Datasheet L4953K Datasheet (SGS Thomson Microelectronics)



L4953K

MULTIFUNCTIONVOLTAGE REGULATOR FOR CAR RADIO

3 OUTPUTS:

8.25V (500mA); 5V (1A); 5V (100mA)
STANDBY

OUT1 (8.25V) AND OUT2 (5V) WITH INDE­PENDENT ENABLE CONTROL FOR STAND­BY MODE

1.5A HIGH SIDE DRIVER WITH CLAMPED
OUTPUT(16V)

LOGICOUTPUTFOR:
– SUPPLYUNDERVOLTAGE (LVW)
– OVERVOLTAGE(FAULT)
– THERMALPROTECTION (FAULT)

RESETFUNCTION
IGNITIONCOMPARATOR
REVERSE BATTERY AND LOAD DUMP

PROTECTION
THERMALSHUTDOWN

DESCRIPTION

The L4953K contains a triple voltage regulator
and a power switch.

The IC includes a monitoring circuit to warn if a

ORDERING NUMBER: L4953K

low voltage orno voltageconditionis occuring.
In stand-by output is active as long as possible

even when in thermalshutdownor any other fault
conditions.

The STCAP pin allows the use of a reserve sup­ply capacitor that will hold enough energy for the
5V Stand-by line to allow the µP to store data.

Multiwatt 15

BLOCK DIAGRAM

7

V

SIG GND

EN 5V

STCAP

EN 8.25V

EN 16V

IGN INP

POW GND

S

3

1

12

2

15

5

8

D94AU213B

DUMP

LOAD

AND

REV

BATT PROT

VCAP

Vref1 LVW THRESHOLD

REF
GEN

Vref2 Reset THRESHOLD

IGNITION THRESHOLDPROT

IGN OUT LVW/FAULT RESET

June 2000

This is advanced information on a new productnow indevelopmentor undergoingevaluation. Details are subject to change without notice.

5V,

100mA

REGULATOR

STAND-BY

5V,

1000mA

REGULATOR

SWITCHED

8.25V,
REGULATOR

SWITCHED

16V,

VOLTAGE

SWITCHED

500mA

1.5A
CLAMP

OVERVOLTAGE

UNDERVOLTAGE

THERMAL

RESET

PROT

14136

11

9

10

4

STAND-BY 5V

OUT 5V

OUT 8.25V

OUT 16V

1/8

L4953K

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

SDC

V

STR

I

O

T

op

T

stg

PIN CONNECTION (Topview)

DC Operating Supply Voltage –14 to28 V
Transient Supply Voltage 50 V
Output Current internally limited
Operating Temperature Range –40 to85
Storage Temperature –55 to150

C

°

C

°

TAB CONNECTED TO PIN 8

15
14
13
12
11
10

EN 16V
RESET
LVW/FAULT
STCAP
STBY5V

OUT 8.25V
9
8
7
6
5
4
3
2
1

D94AU054B

OUT 5V

PGND

V

S

IGNOUT

IGNINP

OUT 16V

SGND

EN 8.25V

EN 5V

THERMAL DATA

Symbol Parameter Value Unit

Thermal Resistance Junction-case 2

2/8

R

th j-case

C/W

°

L4953K

ELECTRICALCHARACTERISTICS

(V

S

= 14V, T

=25°C, unless otherwise specified.)

amb

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

S

En Output Noise Voltage Any reg. supply,

Operating Supply Voltage 11 18 V

200 400 µV

f = 100Hz to 200KHz

T

shud

Thermal Shutdown Junction

155

Temperature

5V STAND-BYOUTPUT VOLTAGE

V

∆V

∆V

V

dropout

I

qst-by

5st-by

line

load

Stand-by Output Voltage I

= 5mA 4.75 5 5.25 V

Load

Line Regulation 11V < VS< 16V 5 50 mV
Load Regulation 5mA < Iout < 100mA 45 150 mV
Dropout Voltage I
Quiescent Current @ Stand-by I

= 100mA, VS= 5.5V 0.2 0.6 V

out

= 5mA 0.3 0.5 mA

Load

5V/1000mASWITCHED OUTPUT VOLTAGE

V

out5

∆V

line

∆V

load

V

dropout

I

q

SWon Switch ON 3.5 V

SW off Switch OFF 1.5 V

SW hyst Switch Hysteresis 100 200 350 mV

R

in

5V Output Voltage no load 4.75 5 5.25 V
Line Regulation 7V < VS < 18V 5 50 mV
Load Regulation 5mA < Iout < 1A 12 50 mV
Dropout Voltage I
Quiescent Current 75mA < I

= 1A, VS= 5.5V 1 1.5 V

out

< 1A 30 100 mA

out

Input Impedance 25 40 50 K

8.25V/500mASWITCHED OUTPUT VOLTAGE

C

°

Ω

V

out

∆V

line

∆V

load

V

dropout

I

q

SVR Supply Voltage Rejection f = 100Hz

8.25V Output Voltage no load 7.9 8.25 8.6 V
Line Regulation 11V < VS < 18V 5 50 mV
Load Regulation Iout = 500mA 12 50 mV
Dropout Voltage I
Quiescent Current I

= 500mA, 5.5V < VS< 8.8V 0.4 0.9 V

out

= 500mA 10 25 mA

out

f = 10KHz

55
40

75 dB

SWon Switch ON 3.5 V

SW off Switch OFF 1.5 V

SW hyst Switch Hysteresis 100 200 350 mV

R

in

Input Impedance 25 40 50 KΩ

HIGH SIDEDRIVERWITHCLAMPEDOUTPUT(16V)

V

out16

I

O

V

dropout

SWon Switch ON 3.5 V

SW off Switch OFF 1.5 V

SW hyst Switch Hysteresis 100 200 350 mV

R

in

Max. Output Voltage VS= 18V 15 16.2 V
Output Continuous Current VS = 15V 1.5 A
Dropout Voltage I

= 1A, 6V < VS< 15V 0.4 0.9 V

out

Input Impedance 25 40 50 KΩ

3/8

L4953K

ELECTRICALCHARACTERISTICS (continued)

LVW/FAULT(referredto V

Symbol Parameter Test Condition Min. Typ. Max. Unit

THON

THOFF

∆

(LVW-out8.25)

LVW ON Threshold 8.55 9.00 9.45 V

LVW

LVW OFF Threshold 8.75 9.20 9.65 V

LVW

LVW-V

out 8.25

HYST Threshold Hysteresis 50 200 350 mV

OUT

I

leak

LVW Output Voltage 1.5 V

LW

Leakage Current 50 µA

RESET (referred to 5V st-by)

)

S

0.5 0.65 V

THON

THOFF

HYST

OUT

I

leak

Reset ON Threshold 3.6 3.8 4 V

reset

Reset OFF Threshold 3.8 4 4.2 V

reset

Reset Threshold Hysteresis 50 100 250 mV

reset

Reset Output Voltage 1.5 V

reset

Reset Leakage Current 50 µA

IGNITION

TH

HYST

IGN

Ign Comparator Positive

ign

Threshold
Ign Comparator Threshold

ign

Hysteresis
Ignition Comparator Output High 3.5 Vst-by V

high

CIRCUIT CONFIGURATION - PIN EQUIVALENTCIRCUITS

PIN 1:
PIN 2:

EN 5V
EN 8.25V

PIN 4:

20K

5.5 6.5 7.5 V

100 300 500 mV

OUT16V

4/8

18.5K

D95AU402

2.1K

10K

6.5K

D95AU403

L4953K

PIN 5: ING INP

36.3K

9.7K

PIN 7: VS

5.7V 5.3K

D95AU404

PIN 6: IGN OUT

7K

D95AU405

PIN 9: OUT 5V

7.5V

7.5V

5.7V

9K

28K

PIN 10: OUT 8.25V

D95AU408

23K

33K

7.5V

D95AU406

3.8K

780K

4K

D95AU407

PIN 11: STAND-BY5V

123K

D95AU409

5/8

L4953K

PIN 12: ST-CAP

D95AU410

PIN 14: RESET

7.5V

7.5V

7.5V

PIN 13: LVW / FAULT

30K

D95AU411

PIN 15: EN 16V

20K

70K

D95AU412

7.5V

4K

18.5K

2.1K

10K

D95AU413

6/8

L4953K

DIM.

Dia1 3.65 3.85 0.144 0.152

MIN. TYP. MAX. MIN. TYP. MAX.

A5
B 2.65 0.104
C 1.6 0.063
D 1 0.039
E 0.49 0.55 0.019 0.022
F 0.66 0.75 0.026 0.030
G 1.02 1.27 1.52 0.040 0.050 0.060

G1 17.53 17.78 18.03 0.690 0.700 0.710

H1 19.6 0.772
H2 20.2 0.795

L 21.9 22.2 22.5 0.862 0.874 0.886
L1 21.7 22.1 22.5 0.854 0.870 0.88
L2 17.65 18.1 0.695
L3 17.25 17.5 17.75 0.679 0.689 0.699
L4 10.3 10.7 10.9 0.406 0.421 0.429
L7 2.65 2.9 0.104 0.114

M 4.25 4.55 4.85 0.167 0.179 0.191

M1 4.63 5.08 5.53 0.182 0.200 0.218

S 1.9 2.6 0.075 0.102

S1 1.9 2.6 0.075 0.102

mm inch

0.197

0.713

OUTLINE AND

MECHANICAL DATA

6

Multiwatt15 V

7/8

L4953K

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 supportdevices or systems without express written approval ofSTMicroelectronics.

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