WD1030

Will Semiconductor Ltd.

2

Dec,2017- Rev. 1.0

Typical applications

VIN

EN

VSEL

GND

FB

LX

L1:1uH

Vin:2.7-5.5V

ON/OFF

PWM/PFM

WD1030DA

100K

R2

60K

C1

22pF

Cout

22uF

PG

Fig1 Schematic Diagram

Pin descriptions

Pin Name

Pin Number

Pin Description

FB

1

Feedback pin. Connected to the feedback resistor for adjustable

version or VOUT for fix output version

EN

2

Enable Control. Pull high to turn on. Do not leave it floating

PG

3

Power Good Indicator.

A pull up resistor is needed.

VSEL

4

Do not leave it floating.

0=PFM, 1=PWM mode

VIN

5

Input pin. Decouple this pin to GND with at least 10 uF ceramic Cap.

LX

6

Inductor pin.

GND

7

Ground pin.

Absolute maximum ratings (1)

Parameter

MIN

MAX

Unit

Power Supply VCC

-0.3

6.0

V

Others Pins

-0.3

VCC+0.6V

V

1.5

W

66

°C /W

5

°C /W

150

°C

Lead Temperature (Soldering,10 sec)

260

°C

Storage Temperature Range

-65

150

°C

(1)

Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These

are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated

under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for

extended periods may affect device reliability.