RECOMMENDED OPERATING CONDITIONS

(5)

MIN

NOM

MAX

UNITS

1.8

5.25

V

2.5

5.5

V

CE

0

V

All other pins

0

5.5

V

-40

85

°C

-40

125

°C

(5) The device is not guaranteed to function outside its operating conditions.

ELECTRICAL CHARACTERISTICS

PARAM ETER

SYM BOL

CONDITIONS

MIN

TYP

(6)

MAX

UNITS

1.78

V

0.1

V

Quiescent Current

10

μA

27

μA

Shutdown Current

0.1

1

μA

CE High-Level Threshold

CE Rising

1.2

V

CE Low-Level Threshold

CE Falling

0.3

V

Soft-start time

1

ms

Linear Charge Current Limit

(7)

8425A

0.75

A

8425B

1.3

A

8425A

0.7

A

8425B

1.2

A

Output Discharge Resistor

For

8425A only

100

Ω

20

m

Ω

40

m

Ω

Switching Frequency

500

KHz

Maximum Duty Cycle

90

95

%

Main N-FET Current Limit

(7) (8)

5.0

6.5

A

Feedback Reference Voltage

1.182

1.2

1.218

V

Output Over Voltage Protection

5.8

V

LBI Voltage Threshold

1.176

1.2

1.224

V

LBI Input Hysteresis

20

mV

Thermal Shutdown

(7)

150

°C

Thermal Shutdown Hysteresis

(7)

20

°C

(6) Typical numbers are at 25°C and represent the most likely norm.

(7) Specification is guaranteed by characterization and not 100% tested in production.

(8) Duty cycle affects current limit due to ramp generator.

LESHAN RADIO COMPANY, LTD.

Ver0.5

5/7