L4952

L4952 STMICROELECTRONICS | Alldatasheet

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VOLTAGE REGULATOR FOR CAR RADIO APPLICATIONS OPERATION SUPPLY VOLTAGE 9.5 TO 28V PEAK SUPPLY OVERVOLTAGE PULSE UP TO 52V (VS. GND) FIXED OUTPUT VOLTAGE OF 8.6 ± 0.2V AND OUTPUT CURRENT UP TO 150mA VERY LOW DROP OUTPUT STAGE WITH LOW OUTPUT VOLTAGE DIAGNOSTIC OUTPUT SHORT CIRCUIT AND THERMAL OVERLOAD PROTECTION VERY LOW STANDBY CURRENT (DEVICE DISABLED) TWO INTERNAL OUTPUT VOLTAGE SWITCHES WITH LOW DROPOUT FOR AM/FM SWITCHING DRIVER CIRCUIT FOR EXTERNAL HIGH SIDE SWITCH WITH DROP MONITORING ENABLE INPUT TO SWITCH ON THE DE- VICE ADDITIONAL 10V VERY LOW DROP REGU- LATOR TO SUPPLY THE VARICAP

DESCRIPTION

The L4952 is a monolithic voltage regulator in an advanced BCD60II process with high efficient p- channel transistor. This device is optimized for Car Radio applications to obtain optimum per- formance and supply system integration with high flexibility and minimum peripheral components. June 2000 BLOCK DIAGRAM SO20 (12+4+4) ORDERING NUMBER: L4952D

Symbol Parameter Value Unit Vs DC supply voltage -2.2 .. +28 V Vst Transient operating supply voltage for t = 400ms -2.2 .. +52 V Vo1,2,3,4 Output voltages -0.3 .. +12 V V EN Input voltage of EN -0.3 .. +18 V VIND Input voltage for EN2, EN3, HSON -18 .. +18 V Vs -VIND Max Voltage Difference between Vs and logic inputs EN2, EN3, HSON 52 V VDIAG Diagnostic output -0.3 .. +20 V Io1 Output current out1, out4 short circuit protected mA Io2,3 Output current out2,3 (Note 1) internally limited mA IoDIAG Output current Diagnostic 10 mA IHSSD Driver current for external pnp High side switch internally limited mA TJ Operating junction temperature -40 .. +150 °C Po Power dissipation with on board heat sink 2cm2 1W VESD ESD voltage capability ( MIL 883 C ) ±2000 V Note:Current limiter of OUT1 will also protect OUT2 and OUT3 aslong as OUT1 is notreverse supplied.Output capacitors up to 100µF between OUT and GND will not harm this protection. THERMAL DATA Symbol Parameter Value Unit R th j-amb Thermal Resistance Junction to Ambient with on board heatsink 2cm 2 60 °C/W TJSD Thermal shutdown junction temperature >150 °C OUT1 OUT3 EN3 GND GND GND GND EN2 OUT2 OUT4 DIAG GND GND GND GND HSSD HSSS HSON1 V S EN D95AU401A PIN CONNECTION L4952

The L4952 is a monolithic voltage regulator with an output voltage of typically 8.6V and a maxi- mum output current of 150mA. It ’s a device for audio applications in carradios. The device contain a precision Bandgap refer- ence, a output amplifier with overcurrent protec- tion, two voltage switches, a driver for an external pnp switch, a discharge circuitry for theft detec- tion and a overtemperature protection. For automatic PCB assembly the package is SO12+4+4. To use the maximal current of 150mA a small copper area of 2cm 2 as heat sink on board (Rth=60K/W) is necessary. The device has a very low quiescent current in standby mode. If the digital Input EN is Low the device is switched off (stand by mode) and if EN ELECTRICAL CHARACTERISTICS (V s = 14V; TJ =2 5°C unless otherwise specified) Symbol Parameter Test Condition Min. Typ. Max. Unit Is Vs Quiescent current no Load 1.6 5 mA Issb Vs standby current EN = 0V 0 20 µA VINLEN Low Voltage EN -0.3 0.5 V VINHEN High Voltage EN V S = 18V 3.5 18 V VIN L EN2,3 EN2, EN3, Low Voltage -18 1.05 V VIN H EN2,3 EN2, EN3, High Voltage V S = 18V 1.45 18 V VIN L HSON HSON Low Voltage -18 1.0 V VIN H HSON HSON High Voltage V S = 18V 2.0 18 V IINH Current EN2, EN3, HSON V In =5 V 3 0 7 0 µA IINL Current EN2, EN3, HSON V In = 0V -10 10 µA IIN ON/OFF Current High EN V In = 5V -10 100 200 µA Voltage Regulator (OUT 1) V o1 Output voltage no load 8.4 8.6 8.8 V VDP1 Dropout voltage V s = 8.4V, VDP1 =V s -V out1 Io1= 0.15A, I02,3 = 0mA 0.16 0.6 V Io1= 0.1A, I02,3= 0mA 0.11 0.4 V Io1= 0.05A, I02,3 = 0mA 0.06 0.2 V SVRR Supply Voltage ripple rejection f = 100Hz, C = 10µF ESR = 5Ω 60 70 dB VoLo Load regulation 10mA < I o < 150 mA 30 60 mV IoLim1 Current limits V OUT = 8V 150 300 800 mA Voltage Regulator (OUT 4) V o4 Output voltage no load 9.5 10.0 10.5 V VDP4 Dropout voltage I = 3mA V s = 8.6V 0.14 0.3 V I = 1.5mA Vs = 8.6V 0.075 0.15 V SVRR Supply Voltage ripple rejection f = 100Hz C = 10µF ESR = 5Ω 30 60 dB Vo4Lo Load regulation 0.5mA < I < 3 mA 100 mV Io4Lim Current limits V OUT =8 V 8 6 0 m A Diagnostic Output VLDIAG Output Diagnostic Low voltage RDIAG to 5 V = 10KΩ 0.4 V Δ Vout Output voltage drop before diagnostic activation VS >6 V IO1 = 100mA IO2 =IO3 = 0mA 30 200 mV Voltage Switches Vout2/3 VDP2 Dropout Vout2 Io2 = 50mA, En2 = H 0.25 0.5 V Io2 = 25mA, En2 = H 0.125 0.25 V VDP3 Dropout Vout3 Io3 = 75mA, En3 = L 0.25 0.5 V Io3 = 40mA, En3 = L 0.14 0.28 V High Side Switch Driver VDPHS Low Drop Voltage I out = 50mA, HSON = H 0.26 0.8 V VDPHS Drop detection threshold V Dth =V S -V14, HSON = H 0.7 1 1.3 V L4952

A eB D E L K H A1 C SO20MEC hx4 5° SO20 DIM. mm inch A 2.35 2.65 0.093 0.104 A1 0.1 0.3 0.004 0.012 B 0.33 0.51 0.013 0.020 C 0.23 0.32 0.009 0.013 D 12.6 13 0.496 0.512 E 7.4 7.6 0.291 0.299 e 1.27 0.050 H 10 10.65 0.394 0.419 h 0.25 0.75 0.010 0.030 L 0.4 1.27 0.016 0.050 K0 °(min.)8°(max.) OUTLINE AND MECHANICAL DATA L4952

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics  2000 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com L4952