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* This specifications are subject to be changed without notice

http://www.ad-tech.co.kr

ADT7350

Sep. 9. 2010 / Rev. 0.0

Part List

Component

Type

Value (Model)

Manufacturer

U1

IC

ADT7350

ADTech

D1

Schottky barrier diode

RSX101M-30

ROHM

L1

Chip inductor

4.7uH / 1.6A

TDK

C2

MLCC

22㎌ / 16V

-

C1

MLCC

10㎌ / 50V

-

CB

MLCC

10㎋

-

R1

Chip resistor

49.9㏀ / 1%

-

R2

Chip resistor

16.2㏀ / 1%

-

GND

FB

EN

VIN

SW

BST

6

4

Pin Description

Pin

No.

Name

Pin Description

1BST

Bootstrap. This pin acts as the power supply for internal Power Transistor driver.

Connect a 10nF capacitor between this pin and SW pin.

2

GND

Ground and heat sink. Connect this pin to a large copper PCB area.

3FB

Feedback voltage input. The voltage of this pin is regulated to 0.81V. The shielding in the

PCB layout is option and connect resistor divider as close as possible.

4EN

Chip enable input. The Enable voltage range is higher than 1.2V and disable voltage is

lower than 0.4V.

5

VIN

Power supply input. The input bypass capacitor should be as close as GND pin.

6

SW

Switching node. The free-wheeling diode is connected between this pin and GND.

• R1,R2 : VOUT 3.3V typical case

5

4

1

4

2

3