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this is information on a product in full production. june 2013 docid17785 rev 3 1/22 stod03a dual dc-dc converter for powering amoled displays datasheet - production data features ? step-up and inverter converters ? operating input voltage range from 2.3 v to 4.5 v ? synchronous rectification for both dc-dc converters ? 200 ma output current ? 4.6 v fixed positive output voltages ? programmable negative voltage by s wire from - 2.4 v to - 5.4 v ? typical efficiency: 85% ? pulse skipping mode in light load condition ? 1.5 mhz pwm mode control switching frequency ? enable pin for shutdown mode ? low quiescent current: < 1 a in shutdown mode ? soft-start with inrush current protection ? overtemperature protection ? temperature range: - 40 c to 85 c ? true-shutdown mode ? fast discharge outputs of the circuits after shutdown ? package dfn12l (3 x 3) 0.6 mm height applications ? active matrix amoled power supply ? cellular phones ? camcorders and digital still cameras ? multimedia players description the stod03a is a dual dc-dc converter for amoled display panels. it integrates a step-up and an inverting dc-dc converter making it particularly suitable for battery operated products, in which the major concern is overall system efficiency. it works in pulse skipping mode during low load conditions and pwm-mode at 1.5 mhz frequency for medium/high load conditions. the high frequency allows the value and size of external components to be reduced. the enable pin allows the device to be turned off, therefore reducing the current consumption to less than 1 a. the negative output voltage can be programmed by an mcu through a dedicated pin which implements single-wire protocol. soft-start with controlled inrush current limit and thermal shutdown are integrated functions of the device. dfn12l (3 x 3 mm) table 1. device summary order code positive voltage negative voltage package packaging STOD03ATPUR 4.6v -2.4v to -5.4v dfn12l (3 x 3mm) 3000 parts per reel www.st.com
contents stod03a 2/22 docid17785 rev 3 contents 1 schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6 detailed description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.1 s wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.1.1 s wire features and benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.1.2 s wire protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.1.3 s wire basic operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.2 negative output voltage levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 7 application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7.1 external passive components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7.1.1 inductor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7.1.2 input and output capacitor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7.2 recommended pcb layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 7.3 general description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7.3.1 multiple operation modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7.3.2 enable pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7.3.3 soft-start and inrush current limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 7.3.4 undervoltage lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 7.3.5 overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 7.3.6 fast discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 8 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 9 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
docid17785 rev 3 3/22 stod03a schematic 22 1 schematic note: all the above components refer to the typical application performance characteristics. operation of the device is not limited to the choice of these external components. inductor values ranging from 2.2 h to 6.8 h can be used together with the stod03a. see section 7.1.1 for peak inductor current calculation. figure 1. application schematic l 1 l 2 c mid c o2 c ref l x2 v o2 v mid pgnd agnd c in v bat l x1 v ina v inp en s wire v ref stod03a s-wire en l 1 l 2 c mid c o2 c ref l x2 v o2 v mid pgnd agnd c in v bat l x1 v ina v inp en s wire v ref stod03a s-wire en table 2. typical external components component manufacturer part number value size l 1 abco lpf2807t-4r7m 4.7h 2.8 x 2.8 x 0.7mm l 2 (1) abco lpf3509t-4r7m 4.7h 3.5 x 3.5 x 1.0mm tdk vlf4014at-4r7m1r1 4.7h 3.7 x 3.5 x 1.4mm c in murata grm21br61e475ka12 4.7f 0805 c mid murata grm21br61e475ka12 4.7f 0805 c o2 murata grm21br61e475ka12 4.7f 0805 c ref murata grm155r60j105ke19 1f 0402 1. from - 5.0 v to -5.4 v, 200 ma load can be provided with inductor saturation current as a minimum of 1 a.
schematic stod03a 4/22 docid17785 rev 3 figure 2. block schematic step-up control inverting control discharge fast discharge fast vref logic control otp s-wire vinp ring killer osc s-wire control dmd dmd vref uvlo l x2 v o2 v mid pgnd agnd l x1 v ina v inp en s wire v ref n1 p1a p1b p2 n2 step-up control inverting control discharge fast discharge fast vref logic control otp s-wire vinp ring killer osc s-wire control dmd dmd vref uvlo l x2 v o2 v mid pgnd agnd l x1 v ina v inp en s wire v ref n1 p1a p1b p2 n2
docid17785 rev 3 5/22 stod03a pin configuration 22 2 pin configuration figure 3. pin configuration (top view) table 3. pin description pin name pin number description lx 1 1 switching node of the step-up converter pgnd 2 power ground pin v mid 3 step-up converter output voltage (4.6v) nc 4 not internally connected agnd 5 signal ground pin. this pin must be connected to the power ground pin v ref 6 voltage reference output. 1f bypass capacitor must be connected between this pin and agnd s wire 7 negative voltage setting pin. uses s wire protocol, see details in section 6.1.2 en 8 enable control pin. on=v ina . when pulled low it puts the device in shutdown mode v o2 9 inverting converter output voltage (default -4.9v). lx 2 10 switching node of the inverting converter v in a 11 analogic input supply voltage v in p 12 power input supply voltage exposed pad internally connected to agnd. exposed pad must be connected to agnd and pgnd in the pcb layout in order to guarantee proper operation of the device
maximum ratings stod03a 6/22 docid17785 rev 3 3 maximum ratings note: absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditions is not implied. table 4. absolute maximum ratings symbol parameter value unit v ina , v inp dc supply voltage -0.3 to 6 v en, s wire logic input pins -0.3 to 4.6 v il x2 inverting converter switching current internally limited a l x2 inverting converter switching node voltage -10 to v inp +0.3 v v o2 inverting converter output voltage -10 to agnd+0.3 v v mid step-up converter and output voltage -0.3 to 6 v l x1 step-up converter switching node voltage -0.3 to v mid +0.3 v il x1 step-up converter switching current internally limited a v ref reference voltage -0.3 to 3 v p d power dissipation internally limited mw t stg storage temperature range -65 to 150 c t j maximum junction temperature 150 c esd esd protection hbm 2 kv table 5. thermal data symbol parameter value unit r thja thermal resistance junction-ambient referred to the fr-4 pcb 48.8 c/w r thjc thermal resistance junction-case 2.6 c/w
docid17785 rev 3 7/22 stod03a electrical characteristics 22 4 electrical characteristics t j = 25 c, v ina = v inp = 3.7 v, i mid,o2 = 30 ma, c in = 4.7 f, c mid,o2 = 4.7 f, c ref = 1 f, l1 = 4.7 h, l2 = 4.7 h, v en = v ina = v inp , v mid = 4.6 v, v o2 = -4.9 v unless otherwise specified. table 6. electrical characteristics symbol parameter test conditions min. typ. max. unit general section v ina, v inp supply input voltage 2.3 4.5 v uvlo_h undervoltage lockout high v ina rising 2.22 2.25 v uvlo_l undervoltage lockout low v ina falling 1.9 2.18 v i_v i input current no load condition (sum of v ina and v inp ) 1.3 1.7 ma i q_sh shutdown current v en =gnd (sum of v ina and v inp ); t j =-40c to +85c; 1a v en h enable high threshold v ina =2.3v to 4.5v, t j =-40c to +85c; 1.2 v v en l enable low threshold 0.4 i en enable input current v en =v ina =4.5v; t j =-40c to +85c; 1a f s switching frequency pwm mode 1.2 1.5 1.7 mhz d1 max step-up maximum duty cycle no load 87 % d2 max inverting maximum duty cycle no load 87 % n total system efficiency i mid,o2 =10 to 30ma, v mid =4.6v v o2 =-4.9v 80 % i mid,o2 =30 to 150ma, v mid =4.6v, v o2 =-4.9v 85 % v ref voltage reference i ref =10a 1.208 1.220 1.232 v i ref voltage reference current capability at 98.5% of no load reference voltage 100 a step-up converter section v mid positive voltage total variation v ina =v inp =2.5v to 4.5v; i mid =5ma to 150ma, i o2 no load, t j =-40c to +85c 4.55 4.6 4.65 v temperature accuracy v ina =v inp =3.7v; i mid =5ma; i o2 no load; t j =-40c to +85c 0.5 % v mid lt line transient v ina,p =3.5v to 3.0v, i mid =100ma; t r =t f =50s -12 mv
electrical characteristics stod03a 8/22 docid17785 rev 3 v midt load transient regulation i mid =3 to 30ma and i mid =30 to 3ma, t r =t f =30s 20 mv i mid =10 to 100ma and i mid =100 to 10ma, t r =t f =30s 25 mv v mid-pp tdma noise line transient regulation i mid =5 to 100ma; v ina,p =2.9v to 3.4v; f=200hz; t r =t f =50s; i o2 no load 20 mv i mid max max. step-up load current v ina,p =2.9v to 4.5v -200 ma i-l 1max step-up inductor peak current v mid 10% below nominal value 0.9 1.1 a r dson p1 1.0 2.0 w r dson n1 0.4 1.0 w inverting converter section v o2 output negative voltage range 31 different values set by the s wire pin (see section 6.1.2 ) -5.4 -2.4 v output negative voltage total variation on default value v ina =v inp =2.5v to 4.5v; t j =-40c to +85c; i o2 =5ma to 150ma, i mid no load -4.97 -4.9 -4.83 v temperature accuracy v ina =v inp =3.7v; t j =-40c to +85c; i o2 =5ma, i mid no load 0.5 % v o2 lt line transient v ina,p =3.5v to 3.0v, i o2 =100ma, t r =t f =50s +12 mv v o2t load transient regulation i o2 =3 to 30ma and i o2 =30 to 3ma, t r =t f =100s 20 mv load transient regulation i o2 =10 to 100ma and i o2 =100 to 10ma, t r =t f =100s 25 mv v o2-pp tdma noise line transient regulation i o2 =5 to 100ma; v ina,p =2.9v to 3.4v; f=200hz; t r =t f =50s; i mid no load 25 mv i o2 maximum inverting output current v ina,p =2.9v to 4.5v -200 ma i-l 2max inverting peak current v o2 below 10% of nominal value -1.2 -0.9 a r dson p2 0.42 w r dson n2 0.43 w thermal shutdown otp overtemperature protection 140 c table 6. electrical characteristics (continued) symbol parameter test conditions min. typ. max. unit
docid17785 rev 3 9/22 stod03a electrical characteristics 22 otp hyst overtemperature protection hysteresis 15 c discharge resistor r dis resistor value 400 w t dis discharge time no load, v mid -v o2 at 10% of nominal value 8ms table 6. electrical characteristics (continued) symbol parameter test conditions min. typ. max. unit
typical performance characteristics stod03a 10/22 docid17785 rev 3 5 typical performance characteristics v o2 = - 4.9 v; t a = 25 c; see ta ble 1 for external components used in the tests below. figure 4. efficiency vs. input voltage figure 5. efficiency vs. output current figure 6. quiescent current vs. v in no load figure 7. max power output vs. v in figure 8. fast discharge v in = 3.7 v, no load figure 9. startup and inrush v in = 3.7 v, no load 66% 68% 70% 72% 74% 76% 78% 80% 82% 84% 86% 88% 90% 2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 vin [v] efficiency [%] io=50ma io=100ma io=150ma io=200ma 50% 55% 60% 65% 70% 75% 80% 85% 90% 0 20 40 60 80 100 120 140 160 180 200 iout [ma] efficiency [%] vin=2.7v vin=3.2v vin=3.7v vin=4.2v 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 vin [v] iq [ma] -40c 25c 85c 100 150 200 250 300 350 400 450 500 2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 v in [v] i out [ma] 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 p out [w] max i out at v o2 = -4.9v max p out 100 150 200 250 300 350 400 450 500 2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 v in [v] i out [ma] 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 p out [w] max i out at v o2 = -4.9v max p out en v mid v o2 i in
docid17785 rev 3 11/22 stod03a typical performance characteristics 22 figure 10. step-up ccm operation fi gure 11. inverting ccm operation v en = v ina = v inp = 3.7 v, i mid = 100 ma, t a = 25 c v en = v ina = v inp = 3.7 v, i o2 = 100 ma, t a = 25 c figure 12. line transient figure 13. output voltage vs. input voltage i mid,o2 = 200 ma, v o2 = - 4.9 v v ina = v inp = 2.9 to 3.4 v, i mid,o2 = 100 ma, t r = t f = 50 s v in v mid v o2 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 1.6 1.8 2 2.2 2.4 2.6 2.8 3 v in [v] v o1 +v o2 [v] -40 c 25 c 85 c 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 1.6 1.8 2 2.2 2.4 2.6 2.8 3 v in [v] v o1 +v o2 [v] -40 c 25 c 85 c
detailed description stod03a 12/22 docid17785 rev 3 6 detailed description 6.1 s wire ? protocol: to digitally communicate over a single cable with single-wire components ? single-wire?s 3 components: 1. an external mcu 2. wiring and associated connectors 3. stod13as device with a dedicated single-wire pin. 6.1.1 s wire features and benefits ? fully digital signal ? no handshake needed ? protection against glitches and spikes though an internal low pass filter acting on falling edges ? uses a single wire (plus analog ground) to accomplish both communication and power control transmission ? simplify design with an interface protocol that supplies control and signaling over a single-wire connection to set the output voltages. 6.1.2 s wire protocol ? single-wire protocol uses conventional cmos/ttl logic levels (maximum 0.6 v for logic ?zero? and a minimum 1.2 v for logic ?one?) with operation specified over a supply voltage range of 2.5 v to 4.5 v ? both master (mcu) and slave (stod13as) are configured to permit bit sequential data to flow only in one direction at a time; master initiates and controls the device ? data is bit-sequential with a start bit and a stop bit ? signal is transferred in real time ? system clock is not required; each single-wire pulse is self-clocked by the oscillator integrated in the master and is asserted valid within a frequency range of 250 khz (maximum). 6.1.3 s wire basic operations ? the negative output voltage levels are selectable within a wide range (steps of 100 mv) ? the device can be enabled / disabled via s wire in combination with the enable pin.
docid17785 rev 3 13/22 stod03a detailed description 22 6.2 negative output voltage levels table 7. negative output voltage levels pulse v o2 pulse v o2 pulse v o2 1 -5.411-4.421-3.4 2 -5.312-4.322-3.3 3 -5.213-4.223-3.2 4 -5.114-4.124-3.1 5 -5.015-4.025-3.0 6 (1) -4.9 16 -3.9 26 -2.9 7 -4.817-3.827-2.8 8 -4.718-3.728-2.7 9 -4.619-3.629-2.6 10 -4.5 20 -3.5 30 -2.5 31 -2.4 1. default output voltage. table 8. en and s wire operation table (1) enable s wire action low low device off low high negative output set by s wire high low default negative output voltage high high default negative output voltage 1. the enable pin must be set to agnd while using the s wire function.
application information stod03a 14/22 docid17785 rev 3 7 application information 7.1 external passive components 7.1.1 inductor selection the inductor is the key passive component for switching converters. for the step-up converter an inductance between 4.7 h and 6.8 h is recommended. for the inverting stage the suggested inductance ranges from 2.2 h to 4.7 h. it is very important to select the right inductor according to the maximum current the inductor can handle to avoid saturation. the step-up and the inverting peak current can be calculated as follows: equation 1 equation 2 where v mid : step-up output voltage, fixed at 4.6 v; v o2 : inverting output voltage including sign (minimum value is the absolute maximum value); i o : output current for both dc-dc converters; v in : input voltage for the stod03a; f s : switching frequency. use the minimum value of 1.2 mhz for the worst case; 1: efficiency of step-up converter. typical value is 0.85; 2: efficiency of inverting converter. typical value is 0.75. the negative output voltage can be set via s wire at - 5.4 v. accordingly, the inductor peak current, at the maximum load condition, increases. a proper inductor, with a saturation current as a minimum of 1 a, is preferred. 7.1.2 input and output capacitor selection it is recommended to use ceramic capacitors with low esr as input and output capacitors in order to filter any disturbance present in the input line and to obtain stable operation for the two switching converters. a minimum real capacitance value of 2 f must be guaranteed for c mid and c o2 in all conditions. considering tolerance, temperature variation, and dc polarization, a 4.7 f 10 v capacitor can be used to achieve the required 2 f. 1 l fs v 2 ) vin v ( vin vin 1 i v i mid min mid min min out mid boost peak ? + = ? l fs vin vo vo vin vin i vo vin i min min min min min out min min inverting peak x x - x x + x x - = - 2 ) 2 ( 2 2 2 ) 2 ( l fs vin vo vo vin vin i vo vin i min min min min min out min min inverting peak x x - x x + x x - = -
docid17785 rev 3 15/22 stod03a application information 22 7.2 recommended pcb layout the stod03a is a high frequency power switching device and therefore requires a proper pcb layout in order to obtain the necessary stability and optimize line/load regulation and output voltage ripple. analog input (v ina ) and power input (v inp ) must be kept separated and connected together at the c in pad only. the input capacitor must be as close as possible to the ic. in order to minimize ground noise, a common ground node for power ground and a different one for analog ground must be used. in the recommended layout, the agnd node is placed close to c ref ground while the pgnd node is centered at c in ground. they are connected by a separated layer routing on the bottom through vias. the exposed pad is connected to agnd through vias. detailed description figure 14. top layer and top silkscreen top figure 15. bottom layer and silkscreen top
application information stod03a 16/22 docid17785 rev 3 7.3 general description the stod03a is a high efficiency dual dc-dc converter which integrates a step-up and inverting power stages suitable for supplying amoled panels. thanks to the high level of integration it needs only 6 external components to operate and it achieves very high efficiency using a synchronous rectification technique for each of the two dc-dc converters. the controller uses an average current mode technique in order to obtain good stability and precise voltage regulation in all possible conditions of input voltage, output voltage, and output current. in addition, the peak inductor current is monitored in order to avoid saturation of the coils. the stod03a implements a power saving technique in order to maintain high efficiency at very light load and it switches to pwm operation as the load increases, in order to guarantee the best dynamic performance and low noise operation. the stod03a avoids battery leakage thanks to the true-shutdown feature and it is self protected from overtemperature. undervoltage lockout and soft-start guarantee proper operation during startup. 7.3.1 multiple operation modes both the step-up and the inverting stage of the stod03a operate in three different modes: pulse skipping mode (ps), discontinuous conduction mode (dcm), and continuous conduction mode (ccm). it switches automatically between the three modes according to input voltage, output current, and output voltage conditions. pulse skipping operation: the stod03a works in pulse skipping mode when the load current is below some tens of ma. the load current level at which this way of operating occurs depends on input voltage only for the step-up converter and on input voltage and negative output voltage (v o2 ) for the inverting converter. discontinuous conduction mode: when the load increases above some tens of ma, the stod03a enters dcm operation. in order to obtain this type of operation the controller must avoid the inductor current going negative. the discontinuous mode detector (dmd) blocks sense the voltage across the synchronous rectifiers (p1b for the step-up and n2 for the inverting) and turn off the switches when the voltage crosses a defined threshold which, in turn, represents a certain current in the inductor. this current can vary according to the slope of the inductor current which depends on input voltage, inductance value, and output voltage. continuous conduction mode: at medium/high output loads, the stod03a enters full ccm at constant switching frequency mode for each of the two dc-dc converters. 7.3.2 enable pin the device operates when the en pin is set high. if the en pin is set low, the device stops switching, and all the internal blocks are turned off. in this condition the current drawn from v inp /v ina is below 1 a in the whole temperature range. in addition, the internal switches
docid17785 rev 3 17/22 stod03a application information 22 are in an off state so the load is electrically disconnected from the input, this avoids unwanted current leakage from the input to the load. when the en is pulled high, the p1b switch is turned on for 100 s. in normal operation, during this time, apart from a small drop due to parasitic resistance, v mid reaches v in . if, after this 100 s, v mid stays below v in , the p1b is turned off and stays off until a new pulse is applied to the en. this mechanism avoids stod03a starting if a short-circuit is present on v mid . 7.3.3 soft-start and inrush current limiting after the en pin is pulled high, or after a suitable voltage is applied to v inp , v ina , and en, the device initiates the startup phase. as a first step, the c mid capacitor is charged and the p1b switch implements a current limiting technique in order to keep the charge current below 400 ma. this avoids the battery overloading during startup. after v mid reaches v inp voltage level, the p1b switch is fully turned on and the soft-start procedure for the step-up is started. after about 2 ms the soft-start for the inverting is started. the positive and negative voltage is under regulation by around 6 ms after the en pin is asserted high. 7.3.4 undervoltage lockout the undervoltage lockout function avoids improper operation of stod03a when the input voltage is not high enough. when the input voltage is below the uvlo threshold the device is in shutdown mode. the hysteresis of 50 mv avoids unstable operation when the input voltage is close to the uvlo threshold. 7.3.5 overtemperature protection an internal temperature sensor continuously monitors the ic junction temperature. if the ic temperature exceeds 140 c, typical, the device stops operating. as soon as the temperature falls below 125 c, typical, normal operation is restored. 7.3.6 fast discharge when enable turns from high to low level, the device goes into shutdown mode and lx1 and lx2 stop switching. then, the discharge switch between v mid and v in and the switch between v o2 and gnd turn on and discharge the positive output voltage and negative output voltage. when the output voltages are discharged to 0 v, the switches turn off and the outputs are high impedance.
package mechanical data stod03a 18/22 docid17785 rev 3 8 package mechanical data in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark. table 9. dfn 12l 3x3 mechanical data dim. mm min. typ. max. a0.510.550.60 a1 0 0.02 0.05 a3 0.20 b0.180.250.30 d2.8533.15 d2 1.87 2.02 2.12 e2.8533.15 e2 1.06 1.21 1.31 e0.45 l0.300.400.50
docid17785 rev 3 19/22 stod03a package mechanical data 22 figure 16.dfn 12l 3x3 drawing 8085116_b
package mechanical data stod03a 20/22 docid17785 rev 3 figure 17. dfn 12l 3x3 footprint (a) a. all dimensions are in millimeters 8085116_b
docid17785 rev 3 21/22 stod03a revision history 22 9 revision history table 10. document revision history date revision changes 08-sep-2010 1 initial release. 06-dec-2011 2 updated section 6 on page 12 . 19-jun-2013 3 updated table 4: absolute maximum ratings on page 6 , table 5: thermal data on page 6 , table 7: negative output voltage levels on page 13 and section 8: package mechanical data .
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