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L4954

Quad multifunction voltage regulator for car radio

STMicroelectronics 

Electrical specifications

2

Electrical specifications

L4954

2.1

2.2

Absolute maximum ratings

Table 2. Absolute maximum ratings

Symbol

Parameter

VS DC operating supply voltage

VS

Transient supply overvoltages, rise time = 10 ms ,delay

time = 115 ms

VS,ovs

Vin

Vout

Top

Tstg

Overvoltage shutdown

Input voltages (EN1, EN2, EN3)

Output voltages (LVWarn, RESET)

Operating temperature range

Storage temperature range

Thermal data

Table 3. Thermal data

Symbol

Parameter

Rth j-case Thermal resistance junction-to-case

Value

Unit

-0.6 to 26.5

V

34

V

27

V

-0.6 to 6.0

V

-0.6 to 6.0

V

-40 to 85

°C

-40 to 150

°C

Value

2

Unit

°C/W

2.3

Application circuit

Figure 3. Application circuit

+VS

1000μF

0.1μF

EN1

EN2

EN3

HSD1

HSD2

HSD3

2

15

10

10μF(*)

11

14

12

10μF(*)

1

13

L4954

10μF(*)

3

6

10μF(*)

4

47KΩ

7

STCAP

5

9

8

470μF

0.1μF

(*)ESR of output capacitors should be between 0.2Ω to 5.0Ω

10V-REG1

8.5V-REG2

5V-REG3

5V-REG4

-STBY

47KΩ

LVWarn

RESET

0.1μF

D95AU348C

6/13

Doc ID 17719 Rev 1

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