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this is information on a product in full production. september 2013 doc id 022376 rev. 2 1/19 1 l4989d l4989md low power voltage regulator datasheet ? production data features operating dc supply voltage range 5.6 v to 31 v very low quiescent current with watchdog disabled precision output voltage (3%) low drop voltage (180 mv typ at i o =150ma) reset circuit sensing the output voltage down to 1 v programmable reset delay with external capacitor watchdog disable input programmable watchdog timer with external capacitor thermal shutdown and short circuit protection wide temperature range (t j = -40c to 150c) description the l4989m and l4989md are monolithic integrated 5 v voltage regulators with a low drop voltage at currents up to 150 ma. the output voltage regulating element consists in a p-channel mos and the regulation is performed regardless of input voltage transients up to 40 v. the high precision of the output voltage is obtained with a pre-trimmed reference voltage. the devices are protected against short circuit and an overtemperature protection switches off the devices in case of extremely high power dissipation. the l4989m and l4989md watchdogs are active when the enable pin is high. features like reset and watchdog make this devices particularly suitable to supply micr oprocessor systems in automotive applications. so-8 so-20 table 1. device summary package order codes tube tape and reel so-8 l4989d l4989d013tr so-20 l4989md L4989MD013TR www.st.com
contents l4989d, l4989md 2/19 doc id 022376 rev. 2 contents 1 block diagram and pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3 application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.1 voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.2 reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.3 watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4 package and packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.1 ecopack ? packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.2 so-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.3 so-20 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.4 so-8 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.5 so-20 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
l4989d, l4989md list of tables doc id 022376 rev. 2 3/19 list of tables table 1. device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 table 2. pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 table 3. absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 4. thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 5. general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 table 6. reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 7. watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 8. watchdog enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 9. so-8 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 table 10. so-20 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 table 11. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
list of figures l4989d, l4989md 4/19 doc id 022376 rev. 2 list of figures figure 1. block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 2. pins configuration (top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 3. behavior of output current versus regulated voltage v o . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 figure 4. reset timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 figure 5. watchdog timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 figure 6. so-8 package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 7. so-20 package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 8. so-8 tube shipment (no suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 9. so-8 tape and reel shipment (suffix ?tr?) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 10. so-20 tube shipment (no suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 figure 11. so-20 tape and reel shipment (suffix ?tr?) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
l4989d, l4989md block diagram and pin configuration doc id 022376 rev. 2 5/19 1 block diagram and pin configuration figure 1. block diagram table 2. pins description pin name so-8(d) s0-20(md) function we n 11 watchdog enable input if high watchdog functionality is active gnd 2 4 ground reference gnd 5, 6, 15, 16 ground. connected these pins to a heat spreader ground res 3 7 reset output. it is pulled down when output voltage goes below v o_th or frequency at wi is too low. vcr 4 10 reset timing adjust. a capacitor between vcr pin and gnd, sets the reset delay time (t rd ) vcw 5 11 watchdog timer adjust a capacitor between vcw pin and gnd, sets the time response of the watchdog monitor. wi 6 14 watchdog input. if the frequency at this input pin is too low, the reset output is activated.
block diagram and pin configuration l4989d, l4989md 6/19 doc id 022376 rev. 2 figure 2. pins configuration (top view) v o 717 voltage regulator output block to ground with a capacitor >100nf (needed for regulator stability) v s 820 supply voltage block to ground directly at ic pin with a capacitor n.c. 2, 3, 8, 9, 12, 13, 18, 19 not connected table 2. pins description (continued) pin name so-8(d) s0-20(md) function wen gnd re s vcr 1 2 3 4 5 6 7 8 v s vo wi vcw wen n.c. n.c. gnd gnd gnd re s n.c. n.c. vcr 10 9 8 7 6 5 4 3 2 1 20 n.c. n.c. vo gnd gnd wi n.c. n.c. vcw 11 12 1 3 14 15 16 17 1 8 19 v s so-8 so-20 gapgcft00666
l4989d, l4989md electrical specifications doc id 022376 rev. 2 7/19 2 electrical specifications 2.1 absolute maximum ratings note: maximum ratings are absolute ratings; exceeding any one of these values may cause permanent damage to the integrated circuit. 2.2 thermal data table 3. absolute maximum ratings symbol parameter value unit v vsdc dc supply voltage -0.3 to 40 v i vsdc input current internally limited v vo dc output voltage -0.3 to 6 v i vo dc output current internally limited v wi watchdog input voltage -0.3 to v vo + 0.3 v v od open drain output voltage -0.3 to v vo + 0.3 v i od open drain output current internally limited v cr reset delay voltage -0.3 to v vo + 0.3 v v cw watchdog delay voltage -0.3 to v vo + 0.3 v v wen watchdog enable input voltage -0.3 to 40 v t j junction temperature -40 to 150 ?c v esd esd voltage level (hbm-mil std 883c) 2 kv table 4. thermal data symbol parameter s0-8 s0-12+4+4 unit r th-jamb thermal resistance junction to ambient 130 to 180 50 (1) 1. with 6 sq. cm on board heat sink. c/w
electrical specifications l4989d, l4989md 8/19 doc id 022376 rev. 2 2.3 electrical characteristics v s = 5.6 v to 31 v, t j = -40c to +150c unle ss otherwise specified. table 5. general pin symbol parameter test condition min. typ. max. unit v o v o_ref output voltage v s = 5.6 to 31 v; i o = 1 to 150 ma 4.85 5.0 5.15 v v o i short_13 short circuit current v s =13.5v (1) 1. see figure 3 . 160 210 250 ma v o i lim output current limitation v s =13.5v (1) 170 250 290 ma v s , v o v line line regulation voltage v s = 5.6 to 31 v; i o = 1 to 150 ma 25 mv v o v load load regulation voltage i o = 1 to 150 ma 25 mv v s , v o v dp drop voltage i o = 150 ma 180 400 mv v s , v o svr ripple rejection fr = 100 hz 55 db v s , v o i qs_1 current consumption with watchdog not active i qs_1 =i vs -i o v s =13.5v; i o <1ma; we n =low 69 115 a v s , v o i qs_10 current consumption with watchdog not active i qs_10 =i vs -i o v s =13.5v; i o =10ma; we n =low 127 300 a v s , v o i qs_50 current consumption with watchdog not active i qs_50 =i vs -i o v s =13.5v; i o =50ma; we n =low 498 900 a v s , v o i qs_150 current consumption with watchdog not active i qs_150 =i vs -i o v s =13.5v; i o =150ma; we n =low 1.40 2 ma v s , v o i qn_1 current consumption with watchdog active i qn_1 =i vs -i o v s =13.5v; i o <1ma; we n =high 110 170 a v s , v o i qn_10 current consumption with watchdog active i qn_10 =i vs -i o v s =13.5v; i o =10ma; we n =high 168 350 a v s , v o i qn_50 current consumption with watchdog active i qn_50 =i vs -i o v s =13.5v; i o =50ma; we n =high 538 1000 a v s , v o i qn_150 current consumption with watchdog active i qn_150 =i vs -i o v s =13.5v; i o =150ma; we n =high 1.45 2 ma tw thermal protection temperature 150 190 c tw _ hy thermal protection temperature hysteresis 10 c
l4989d, l4989md electrical specifications doc id 022376 rev. 2 9/19 table 6. reset pin symbol parameter test condition min. typ. max. unit res vres_l reset output low voltage r ext =5k ? to v o ; v o >1v 0.4 v res i res_lkg reset output high leakage current v res =5v 1 a res r res pull up internal resistance versus v o 10 20 50 k ? res v o_th reset threshold voltage v s = 5.6 to 31 v; i o = 1 to 150 ma 6% 8% 10% below v o_ref vcr v rlth reset timing low threshold v s = 13.5 v 10% 13% 16% v o_ref vcr v rhth reset timing hi gh threshold v s = 13.5 v 44% 47% 50% v o_ref vcr i cr charge current v s =13.5v 8 15 30 a vcr i dr discharge current v s =13.5v 8 15 30 a res t rr_2 reset reaction time (1) 1. when v o becomes lower than 4v, the reset reaction time decreases down to 2s assuring a faster reset condition in this particular case. v o =v o_th -100 mv 100 250 700 s res t rd reset delay time v s =13.5v; ctr = 1 nf 65 115 165 ms table 7. watchdog pin symbol parameter test condition min. typ. max. unit wi vih input high voltage v s = 13.5 v 3.5 v wi vil input low voltage v s = 13.5 v 1.5 v wi vih input hysteresis v s = 13.5 v 500 mv wi rwi pull down resistor v s = 13.5 v 30 100 250 k ? vcw vwhth high threshold v s = 13.5 v 44% 47% 50% v o_ref vcw vwlth low threshold v s = 13.5 v 10% 13% 16% v o_ref vcw icwc charge current v s =13.5v; vcw = 0.1 v 51020a vcw icwd discharge current v s =13.5v; vcw = 2.5 v 1.25 2.5 5 a vcw twop watchdog period v s =13.5v; ctw = 47 nf 20 40 80 ms res twol watchdog output low time v s =13.5v; ctw = 47 nf 4816ms
electrical specifications l4989d, l4989md 10/19 doc id 022376 rev. 2 table 8. watchdog enable pin symbol parameter test condition min. typ. max. unit we n v wen_l enable input low voltage 1 v we n v wen_h enable input high voltage 3 v we n v wen_hy enable input hysteresis 600 920 1300 mv we n i_leak pull down current v s =13.5v 1 2.5 5 a
l4989d, l4989md application information doc id 022376 rev. 2 11/19 3 application information 3.1 voltage regulator the voltage regulator uses a p-channel mos tran sistor as a regulating element. with this structure a very low dropout voltage at current up to 150 ma is obtained. the output voltage is regulated up to transient input supply voltage of 40 v. no functional interruption due to over-voltage pulses is generated.the voltage regulator is always active and not depending on the state of we n input pin. a short circuit protection to gnd is provided. figure 3. behavior of output current versus regulated voltage v o 3.2 reset the reset circuit supervises the output voltage v o . the v o_th reset threshold is defined with the in-ternal reference voltage and a resistor output divider. if the output voltage becomes lower than v o_th then res goes low with a reaction time trr. the reset low signal is guaranteed for an output voltage v o greater than 1 v. when the output voltage becomes higher than v o_th then res goes high with a delay t rd . this delay is obtained by an internal oscillator. the oscillator period is given by: t osc = [(v rhth -v rlth ) x c tr ] / i cr + [(v rhth -v rlth ) x c tr ] / i dr where: i cr : is an internally generated charge current i dr : is an internally generated discharge current v rhth , v rlth : are two voltages defined with the output voltage and a resistor output divider c tr : is an external capacitance. t rd is given by: t rd = 512 x t osc the reset is always active and not depending on the state of we n input pin. vo vo_ref iout ishort ilim
application information l4989d, l4989md 12/19 doc id 022376 rev. 2 figure 4. reset timing diagram 3.3 watchdog a connected microcontroller is monitored by the watchdog input w i . if pulses are missing, the reset output pin is set to low. the pulse sequence time can be set within a wide range with the external capacitor, c tw . the watchdog circuit di scharges the capacitor c tw , with the constant current i cwd . if the lower threshold v wlth is reached, a watchdog reset is generated. to prevent this the microcontroller must generate a positive edge during the discharge of the capacitor before the voltage has reached the threshold v wlth . in order to calculate the minimum time t, during which the micro-controller must output the positive edge, the following equation can be used: (v whth -v wlth ) x c tw = i cwd x t every w i positive edge switches the current source from discharging to charging. the same happens when the lower threshold is reached. when the voltage reaches the upper threshold, v whth , the current switches from charging to discharging. the result is a saw-tooth voltage at the watchdog timer capacitor c tw . figure 5. watchdog timing diagram trr trr trd4osc 4osc 6rhth 6rlth 2es 6cr 6o 7i 6out?th '!0'#&4 7i 6cw 2es 6wlth 6whth twop twol 6wlth ("1($'5
l4989d, l4989md package and packing information doc id 022376 rev. 2 13/19 4 package and packing information 4.1 ecopack ? packages 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. 4.2 so-8 package information figure 6. so-8 package dimensions '!0'#&4
package and packing information l4989d, l4989md 14/19 doc id 022376 rev. 2 table 9. so-8 mechanical data symbol millimeters min. typ. max. a 1.75 a1 0.10 0.25 a2 1.25 b 0.28 0.48 c 0.17 0.23 d (1) 4.80 4.90 5.00 e 5.80 6.00 6.20 e1 (2) 3.80 3.90 4.00 e1.27 h 0.25 0.50 l 0.40 1.27 l1 1.04 k0 8 ccc 0.10 1. dimensions d does not include mold flash, protrusions or gate burrs. mold flash, potrusions or gate burrs shall not exceed 0.15mm in total (both side). 2. dimension ?e1? does not include interlead flash or pr otrusions. interlead flash or protrusions shall not exceed 0.25mm per side.
l4989d, l4989md package and packing information doc id 022376 rev. 2 15/19 4.3 so-20 package information figure 7. so-20 package dimensions table 10. so-20 mechanical data symbol millimeters min. typ. max. a 2.35 2.65 a1 0.10 0.30 b 0.33 0.51 c 0.23 0.32 d (1) 1. ?d? dimension does not include mold flash, protusions or gat e burrs. mold flash, protusions or gate burrs shall not exceed 0.15mm per side. 12.60 13.00 e 7.40 7.60 e1.27 h 10.0 10.65 h 0.25 0.75 l 0.40 1.27 k0 8 ddd 0.10
package and packing information l4989d, l4989md 16/19 doc id 022376 rev. 2 4.4 so-8 packing information figure 8. so-8 tube shipment (no suffix) figure 9. so-8 tape and reel shipment (suffix ?tr?) all dimensions are in mm. base q.ty 100 bulk q.ty 2000 tube length ( 0.5) 532 a 3.2 b 6 c ( 0.1) 0.6 c b a tape dimensions according to electronic industries association (eia) standard 481 rev. a, feb. 1986 all dimensions are in mm. tape width w 12 tape hole spacing p0 ( 0.1) 4 component spacing p 8 hole diameter d (+0.1/-0) 1.5 hole diameter d1 (min) 1.5 hole position f ( 0.05) 5.5 compartment depth k (max) 4.5 hole spacing p1 ( 0.1) 2 top cover tape end start no components no components components 500mm min 500mm min empty components pockets saled with cover tape. user direction of feed reel dimensions all dimensions are in mm. base q.ty 2500 bulk q.ty 2500 a (max) 330 b (min) 1.5 c ( 0.2) 13 f 20.2 g (+ 2 / -0) 12.4 n (min) 60 t (max) 18.4
l4989d, l4989md package and packing information doc id 022376 rev. 2 17/19 4.5 so-20 packing information figure 10. so-20 tube shipment (no suffix) figure 11. so-20 tape and reel shipment (suffix ?tr?) all dimensions are in mm. base q.ty 40 bulk q.ty 800 tube length ( 0.5) 532 a 3.5 b 13.8 c ( 0.1) 0.6 a c b base q.ty 1000 bulk q.ty 1000 a (max) 330 b (min) 1.5 c ( 0.2) 13 d 20.2 g (+ 2 / -0) 24.4 n (min) 60 t (max) 30.4 tape dimensions according to electronic industries association (eia) standard 481 rev. a, feb. 1986 all dimensions are in mm. tape width w 24 tape hole spacing p0 ( 0.1) 4 component spacing p 12 hole diameter d (+0.1/-0) 1.5 hole diameter d1 (min) 1.5 hole position f ( 0.05) 11.5 compartment depth k (max) 6.5 hole spacing p1 ( 0.1) 2 top cover tape end start no components no components components 500mm min 500mm min empty components pockets saled with cover tape. user direction of feed reel dimensions
revision history l4989d, l4989md 18/19 doc id 022376 rev. 2 5 revision history table 11. document revision history date revision changes 16-apr-2012 1 initial release. this document replace the l4989 datasheet. 19-sep-2013 2 updated disclaimer.
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