L5951 datasheet(7/13 Pages) STMICROELECTRONICS

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L5951

∆Vload

Load Regulation

0.5mA

≤ IREG2 ≤ 100mA

(Measure

∆VREG2 Across VLOAD

Range)

100

VDROPOUT Dropout Voltage (Measure VBAT -

VREG2 when VREG2 drops 0.1V)

IREG2 =100mA

IREG2 =5mA

450

Ilim2

Current Limit

200

SVR2

Reg2 Supply Voltage Rejection

IREG1 = IREG2 = IREG3 = 50mA

f = 20 to 20kHz

VBAT = 14Vdc, 1Vac,pp

7.8V/100mA Regulator Output 3

VREG3

Output Voltage

IREG3 =100mA - 8.8V ≤ VBAT ≤

Range

7.60

7.8

DVline

Line Regulation

8.8V

≤ VBAT ≤ 26V

(Measure

∆VREG3 Across VBAT

Range)

DVload

Load Regulation

5mA

≤ IREG3 ≤ 100mA

(Measure

∆VREG3 Across VLOAD

Range)

VDROPOUT Dropout Voltage

(Measure VBAT - VREG3 when

VREG3 drops 0.1V)

IREG3 = 100mA

IREG3 = 5mA

0.5

0.04

Ilim3

Current Limit

200

SVR3

Reg3 Supply Voltage Rejection

IREG1 = IREG2 = IREG3 = 50mA

f = 20 to 20kHz

VBAT = 14Vdc, 1Vac,pp

DC Characteristics for Class 2 Transceiver

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

BUSih

BUSil

BUS Guaranteed

Input Voltages

Verify RX > 3 VDC

Verify RX < 3 VDC

4.25

3.7

3.50

BUSHyst

BUS Hysteresis

BUSItoh - BUShhtol

0.15

BUSov

BUS Output Voltage

TX = 5 VDC,

BUS = 257 to 1380

Ω to gnd

VBAT - 8.2 to 16 VDC

VBAT - 6.0 to 8.2 VDC

TX = 0V

7.2

IBUSshort BUS Short Circuit Current

TX = 5VDC

BUS = -2 to 4.8VDC

170

IBUSleak

BUS Leakage Current

BUS = -2 to 0 VDC

BUS = 0 to VBAT

LOADON Load Output

ILOAD = 6mA

0.045

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

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