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L5951
(Rev.:2001)

TRIPLE OUTPUT MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO WITH IDR/CLASS 2 INTERFACE

STMicroelectronics 

L5951

ELECTRICAL CHARACTERISTICS (continued)

(Tamb = 25°C, VBAT = 14.4V unless otherwise specified. Standard Loads: IREG1 = 0.5mA, IREG2 = 0.5mA, IREG3 = 5mA)

Symbol

Parameter

Test Condition

Min. Typ. Max. Unit

∆Vload Load Regulation

0.5mA ≤ IREG2 ≤ 100mA

(Measure ∆VREG2 Across VLOAD

Range)

14

100 mV

VDROPOUT Dropout Voltage (Measure VBAT - IREG2 =100mA

VREG2 when VREG2 drops 0.1V) IREG2 =5mA

450

mV

22

mV

Ilim2 Current Limit

200

mA

SVR2 Reg2 Supply Voltage Rejection

IREG1 = IREG2 = IREG3 = 50mA

f = 20 to 20kHz

VBAT = 14Vdc, 1Vac,pp

45

dB

7.8V/100mA Regulator Output 3

VREG3 Output Voltage

IREG3 =100mA - 8.8V ≤ VBAT ≤

7.60 7.8

8

V

Range

DVline Line Regulation

8.8V ≤ VBAT ≤ 26V

(Measure ∆VREG3 Across VBAT

Range)

50

mV

DVload Load Regulation

5mA ≤ IREG3 ≤ 100mA

(Measure ∆VREG3 Across VLOAD

Range)

50

mV

VDROPOUT Dropout Voltage

(Measure VBAT - VREG3 when

VREG3 drops 0.1V)

IREG3 = 100mA

IREG3 = 5mA

0.5

V

0.04

V

Ilim3 Current Limit

200

mA

SVR3 Reg3 Supply Voltage Rejection

IREG1 = IREG2 = IREG3 = 50mA

f = 20 to 20kHz

VBAT = 14Vdc, 1Vac,pp

45

dB

DC Characteristics for Class 2 Transceiver

Standard Loads: IREG1 = 0.5mA, IREG2 = 0.5mA, IREG3 = 5mA

BUSih BUS Guaranteed

BUSil Input Voltages

Verify RX > 3 VDC

Verify RX < 3 VDC

4.25 3.7

V

3.50

V

BUSHyst BUS Hysteresis

BUSItoh - BUShhtol

0.15

V

BUSov BUS Output Voltage

TX = 5 VDC,

BUS = 257 to 1380Ω to gnd

VBAT - 8.2 to 16 VDC

VBAT - 6.0 to 8.2 VDC

TX = 0V

7.2

V

5

V

IBUSshort BUS Short Circuit Current

TX = 5VDC

BUS = -2 to 4.8VDC

170

mA

IBUSleak BUS Leakage Current

BUS = -2 to 0 VDC

BUS = 0 to VBAT

0

mA

0

mA

LOADON Load Output

ILOAD = 6mA

0.045

V

7/13

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