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? semiconductor components industries, llc, 2001 september, 2001 rev. 3 1 publication order number: ncp5426/d ncp5426 ldo regulator/vibration motor driver the ncp5426 series of fixed output, 150 ma low dropout linear regulators are designed to be an economical solution for a variety of applications. each device contains a voltage reference unit, an error amplifier, a pnp power transistor, resistors for setting output voltage, an under voltage lockout on the input, an enable pin, and current limit and temperature limit protection circuits. the ncp5426 is designed for driving a vibration motor using ceramic capacitors on the output. the device is housed in the microminiature tsop5 surface mount package. the ncp5426 is available in output voltages of 1.2 to 2.0 volts in 0.1 volt increments. features ? wide operating voltage range to 12 volts ? internally set output voltages ? enable pin for on/off control ? uvlo on the input voltage with hysteresis ? current and thermal protection ? compatible with ceramic, tantalum or aluminum electrolytic capacitors typical applications ? vibration motor driver driver w/ current limit v in v out thermal shutdown enable gnd off on 5 1 4 2 figure 1. internal schematic uvlo this device contains 47 active transistors. http://onsemi.com see detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet. ordering information tsop5 (sot235, sc595) sn suffix case 483 1 5 pin connections and marking diagram 1 3 v out enable 2 gnd n/c 4 v in 5 xxxyw xxx = version y = year w = work week (top view)
ncp5426 http://onsemi.com 2 detailed pin description pin name description 1 enable the enable pin allows the user to control the output. a low signal disables the output and places the device into a low current standby mode. 2 gnd ground pin. 3 n/c this pin is not connected to the device. 4 vout regulated output voltage. 5 vin input voltage. maximum ratings rating symbol value unit max voltage, all pins v max 12 v power dissipation to air p a 150 mw power dissipation, board mounted p 600 mw operating and storage temperature t a 40 to 85 c thermal resistance t ja 300 c/w junction temperature t j 125 c electrical characteristics (t a = 25 c, for min/max values t a is the operating junction temperature that applies, v cc = 3.5 v, unless otherwise noted.) characteristic symbol min typ max unit operating voltage v cc 12 v operating voltage turn on, i out = 30 ma, increasing v cc v ccon 2.6 2.8 v operating voltage turn off, i out = 30 ma, decreasing v cc v ccoff 2.0 2.1 2.2 v operating voltage hysteresis, i out = 30 ma v cc(hyst) 400 500 600 mv operating current no load i cc 120 240 m a operating current, v cc = 1.8 v, enable high i cc(uvlo) 80 160 m a operating current, enable low i cc(off) 0.1 m a maximum output current, v out = 0.95 *v nom i out(max) 150 ma over current protection, v out = 0 v i out(limit) 270 ma load regulation, v in = 3.5 v, i out 1.0 to 100 ma reg load 30 60 mv line regulation, i out = 30 ma, v in 3.0 to 5.0 v reg line 10 20 mv ripple rejection, v in 3.5 v, f 120 hz, v pp 1.0 v, i out 30 ma rr 55 70 db temperature shutdown t std 150 c v cc low detector temperature coefficient, i out = 30 ma, t = 40 to 85 c v cc h to l/ t 200 ppm/ c v out temperature coefficient v o / t 100 ppm/ c enable pin high threshold v eh 1.6 v enable pin low threshold v el 0.4 v enable pin current, v e = 1.6 v l e 5.0 10 m a 1.3 volt output voltage, i out = 30 ma v out 1.261 1.3 1.339 v
ncp5426 http://onsemi.com 3 100 80 70 60 50 100 k 10 k 40 30 20 10 0 1 k 1 m frequency (hz) ripple rejection (db) 90 0.8 0 12 75 0 50 25 load regulation (mv) 20 figure 2. load regulation ncp5426 figure 3. current limit ncp5426 output current (ma) output voltage (v) 20 0 200 250 150 100 300 50 0.4 1.0 0.2 0.6 0 1.2 1.4 output current (ma) 4 8 16 100 150 4 8 12 16 125 50 136 50 130 0 quiescent current ( a) 118 temperature ( c) figure 4. quiescent current vs. temperature figure 5. undervoltage lockout vs. temperature 140 temperature ( c) 132 134 138 100 125 128 126 124 122 120 figure 6. ripple rejection vs. frequency v in = 3.5 v v out = 1.3 v i out = 1.0 ma c out = 1.0 m f v e = 2.5 v v in = 3.5 v i out = 0 ma v out(nom) = 1.3 v v e = v in v in = 3.5 v v e = 2.5 v v out(nom) = 1.3 v v in = 3.5 v v e = 2.5 v v out = 1.3 v c out = 1.0 f 50 2.7 125 2.4 60 10 uvlo (v) 2.0 2.5 2.6 2.3 2.2 2.1 v th on v th off 25 25 75 0 150 time ( m s) output voltage deviation (mv) 100 200 700 300 400 500 600 800 900 i out , output current (ma) i out = 1 ma to 150 ma v in = 3.5 v v out = 1.3 v c in = 4.7 m f c out = 4.7 m f figure 7. load transient response 1000 50 0
ncp5426 http://onsemi.com 4 7.00 6.50 6.25 6.75 6.00 3.75 enable current ( m a) 3.00 temperature ( c) figure 8. enable current vs. temperature figure 9. enable current vs. temperature enable current ( m a) temperature ( c) 4.00 3.50 3.25 50 50 0 100 50 0 50 v in = 3.5 v v e = 1.6 v i out = 30 ma v in = 3.5 v v e = 2.5 v i out = 30 ma 25 75 125 100 25 75 125 3 0.70 12 0.40 9 6 line regulation (mv) 0 figure 10. line regulation 0.90 v in (v) 0.50 0.60 0.80 0.30 0.20 0.10 v out = 1.3 v i out = 30 ma c out = 1 m f figure 11. resistive transient response for switching the enable pin, r out 13 ohms figure 12. transient response for switching the enable pin, vibration motor load c in = c out = 4.7 f c in = c out = 4.7 f v in = 3.5 v v out = 1.3 v 100 ms/div 1.3 v 0 v out 50 ma 0 ma i out v in = 3.5 v v out = 1.3 v 50 s/div 1.3 v 0 v out 100 ma 0 i out
ncp5426 http://onsemi.com 5 definitions load regulation the change in output voltage for a change in output load current at a constant temperature and input voltage. dropout voltage the input/output differential at which the regulator output no longer maintains regulation against further reductions in input voltage. measured when the output drops 2.0% below its nominal. the junction temperature, load current, and minimum input supply requirements affect the dropout level. output noise voltage this is the integrated value of the output noise over a specified frequency range. input voltage and output load current are kept constant during the measurement. results are expressed in vrms or nv hz . quiescent current the current which flows through the ground pin when the regulator operates without a load on its output: internal ic operation, bias, etc. when the ldo becomes loaded, this term is called the ground current. it is actually the dif ference between the input current (measured through the ldo input pin) and the output current. line regulation the change in output voltage for a change in input voltage. the measurement is made under conditions of low dissipation or by using pulse technique such that the average chip temperature is not significantly affected. line transient response typical over and undershoot response when input voltage is excited with a given slope. thermal protection internal thermal shutdown circuitry is provided to protect the integrated circuit in the event that the maximum junction temperature is exceeded. when activated at typically 150 c, the regulator turns off. this feature is provided to prevent failures from accidental overheating. maximum package power dissipation the power dissipation level at which the junction temperature reaches its maximum operating value, i.e. 125 c.
ncp5426 http://onsemi.com 6 applications information the following description will assist the system designer to correctly use the ncp5426 in an application. the ncp5426 is designed specifically for use with inductive loads, typically vibration motors. the ldo is capable of using ceramic and tantalum capacitors. please refer to figure 13 for a typical system schematic. input decoupling a capacitor, c1, is necessary on the input for normal operation. a ceramic or tantalum capacitor with a minimum value of 1.0 m f is required. higher values of capacitance and lower esr will improve the overall line and load transient response. output decoupling a capacitor, c2, is required for the ncp5426 to operate normally. a ceramic or tantalum capacitor will suffice. the selection of the output capacitor is dependant upon several factors: output current, power up and down delays, inductive kickback during power up and down. it is recommended the output capacitor be as close to the output pin and ground pin for the best system response. enable pin the enable pin will turn on or off the regulator. the enable pin is active high. the internal input resistance of the enable pin is high which will keep the current very low when the pin is pulled high. a low threshold voltage permits the ncp5426 to operate directly from microprocessors or controllers. thermal as power across the ncp5426 increases, it might become necessary to provide some thermal relief. the maximum power dissipation supported by the device is dependent upon board design and layout. mounting pad configuration on the pcb, the board material and the ambient temperature effect the rate of junction temperature rise for the part. this is stating that when the ncp5426 has good thermal conductivity through the pcb, the junction temperature will be relatively low with high power dissipation applications. the maximum dissipation the package can handle is given by: pd t j(max) t a r ja t j is not recommended to exceed 125 c. the ncp5426 can dissipate up to 400 mw @ 25 c. the power dissipated by the ncp5426 can be calculated from the following equation: p tot [ v in *i gnd (i out ) ] [ v in v out ] *i out or v inmax p tot v out * i out i gnd i out if a 150 ma output current is needed then the ground current is extracted from the data sheet curves: 200 a @ 150 ma. for an ncp5426sn18t1 (1.8 v), the maximum input voltage will then be 4.4 v, good for a 1 cell liion battery. hints please be sure the vin and gnd lines are suf ficiently wide. when the impedance of these lines is high, there is a chance to pick up noise or cause the regulator to malfunction. set external components, especially the output capacitor, as close as possible to the circuit, and make leads as short as possible. figure 13. typical applications circuit for driving a vibration motor c2 c1 enable gnd n/c v in v out vibration motor v cc off on v ccon v out resistive load v out motor load v ccoff v cc figure 14. timing diagram v cchyst
ncp5426 http://onsemi.com 7 minimum recommended footprint for surface mounted applications surface mount board layout is a critical portion of the total design. the footprint for the semiconductor packages must be the correct size to insure proper solder connection interface between the board and the package. with the correct pad geometry, the packages will self align when subjected to a solder reflow process. inches mm 0.028 0.7 0.074 1.9 0.037 0.95 0.037 0.95 0.094 2.4 0.039 1.0 tsop5 (footprint compatible with sot235)
ncp5426 http://onsemi.com 8 ordering information device nominal output voltage* marking package shipping ncp5426sn13t1 1.3 ldz tsop5 3000 units/ ncp5426sn13t2 1.3 ldz tsop5 3000 units/ 7 tape & reel *contact your on semiconductor sales representative for other output voltage options. 4.00 2.00 1.75 1.00 min 4.00 figure 15. t1 reel configuration/orientation direction of feed tape dimensions mm 1.50 typ 8.00 0.30 3.50 0.50 4.00 2.00 1.75 1.00 min 4.00 figure 16. t2 reel configuration/orientation direction of feed tape dimensions mm 1.50 typ 8.00 0.30 3.50 0.50
ncp5426 http://onsemi.com 9 package dimensions tsop5 (sot235, sc595) sn suffix plastic package case 48301 issue b notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. maximum lead thickness includes lead finish thickness. minimum lead thickness is the minimum thickness of base material. dim min max min max inches millimeters a 2.90 3.10 0.1142 0.1220 b 1.30 1.70 0.0512 0.0669 c 0.90 1.10 0.0354 0.0433 d 0.25 0.50 0.0098 0.0197 g 0.85 1.05 0.0335 0.0413 h 0.013 0.100 0.0005 0.0040 j 0.10 0.26 0.0040 0.0102 k 0.20 0.60 0.0079 0.0236 l 1.25 1.55 0.0493 0.0610 m 0 10 0 10 s 2.50 3.00 0.0985 0.1181 0.05 (0.002) 123 54 s a g l b d h c k m j
ncp5426 http://onsemi.com 10 notes
ncp5426 http://onsemi.com 11 notes
ncp5426 http://onsemi.com 12 on semiconductor and are trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scill c data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body , or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthori zed use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. publication ordering information japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. ncp5426/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com n. american technical support : 8002829855 toll free usa/canada

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