WD3124DA

Will Semiconductor Ltd.

4

Oct, 2017 - Rev. 1.2

Block diagram

RSET BLOCK

RSET

+-

+-

RESISTOR

TAPS

0

1

BG REF

1.26V

50mV

FB

COMP

MUX

2x1

+

-

FB REF

CLK

COUNTER

32 COUNT

CLR

2.2MHz

CLK

135C ON

145C OFF

THERMAL FAULT

OVER TEMP COMP

CLK

ONE

SHOT

FLASH

EN

VIN

FB SGND

C1

C2

VOUT

PGND

MODE SWITCH

0 = 1X

1 = 2X

S

R

0

SET

DOMINANT

FB COMP

RSET REF

FLASH = 1, S = 1, RSET REF

TORCH = 0, S = 0, 50mV

CHARGE PUMP

SWITCHERS

Absolute maximum ratings

These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum Ratings” may cause

substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the

specification is not implied and prolonged exposure to extreme conditions may affect device reliability.

Note 1: Surface mounted on FR-4 Board using 1 square inch pad size, dual side, 1oz copper

Parameter

Symbol

Value

Unit

VIN,VOUT pin voltage range

V

-0.3～6

V

EN, FB pin voltage range

-

-0.3～5.5

V

Output Current Pulse(Flash)

1.5

A

Output Current Continuous(Torch)

0.4

A

Power Dissipation (Note 1)

3

W

Junction to Ambient Thermal Resistance (Note 1)

57

Junction temperature

150

Lead temperature(Soldering, 10s)

260

Operating ambient temperature

Topr

-40 ~ 85

Storage temperature

Tstg

-55 ~ 150

ESD Ratings

HBM

8000

V

MM

400

V