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L4952D013TR
VOLTAGE REGULATOR FOR CAR RADIO APPLICATIONS
gerTpi' L4952
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 i 0.2V
AND OUTPUT CURRENT UP TO 150mA
n VERY LOW DROP OUTPUT STAGE WITH
LOW OUTPUT VOLTAGE DIAGNOSTIC
n OUTPUT SHORT CIRCUIT AND THERMAL
OVERLOAD PROTECTION SO20 (12+4+4)
. VERY LOW STANDBY CURRENT (DEVICE .
DISABLED) ORDERING NUMBER: L4952D
n TWO INTERNAL OUTPUT VOLTAGE
SWITCHES WITH LOW DROPOUT FOR
AM/FM SWITCHING
n DRIVER CIRCUIT FOR EXTERNAL HIGH DESCRIPTION
SIDE SWITCH WITH DROP MONITORING The L4952 is a monolithic voltage regulator in an
n ENABLE INPUT TO SWITCH ON THE DE- advanced BCD60ll process with high efficient p-
VICE channel transistor. This device is optimized for
I ADDITIONAL 10V VERY LOW DROP REGU- Car Radio applications to obtain optimum per-
LATOR TO SUPPLY THE VARICAP formance and supply system integration with high
flexibility and minimum peripheral components.
BLOCK DIAGRAM
EXTERNAL HIGH SIDE SWITCH
“I Tim
DRIVER cmcu'n' WITH
DROP MONITORING
DIGrTAL VOLTAGE swrrcu
INPUT 1*
INPUT f
VOLTAGE t vs ' VOUT1 _,'"i"
[ _ [ --i
F-- DIGITAL
AMPLIFIER DIAS OUTPUT
MGTAL Ch (1"
INPUT [
Varicap sugary
Note I: CL IU|IF.O I os ESRS I012 al 100 KHz
June 2000 1/8
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VS DC supply voltage -2.2 .. +28 V
Vst Transient operating supply voltage for t = 400ms -2.2 .. +52 V
V012,“ Output voltages -0.3 .. +12 V
VEN Input voltage of EN -0.3 .. +18 V
VIND Input voltage for EN2, EN3, HSON -18 .. +18 V
VS A/may Max Voltage Difference between Vs and logic inputs EN2, 52 V
EN3, HSON
VDIAG Diagnostic output -0.3 .. +20 V
lol Output current out1, out4 short circuit protected mA
lozg Output current out2,3 (Note 1) internally limited mA
IoDlAG Output current Diagnostic 10 mA
le30 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 20m2 1 W
VESD ESD voltage capability ( MIL 883 C ) E000 V
Note: Current limiter ofOUT1 will also protect OUT2 and OUT3 as long as OUT1 is not reverse supplied. Output capacitors up to 100pF between
OUT and GND will not harm this protection.
PIN CONNECTION
OUT1 1 HSON
OUT3 2 HSSS
EN3 3 HSSD
GND 4 GND
GND 5 GND
GND 6 GND
GND 7 GND
EN2 8 DIAG
OUT2 9 OUT4
VS 1 EN
D95AU40IA
THERMAL DATA
Symbol Parameter Value Unit
Rm j-amb ‘Zl'gigmal Resistance Junction to Ambient with on board heatsink 60 "C/W
TJSD Thermal shutdown junction temperature >150 °C
