ADT7221 datasheet(2/6 Pages) ADTECH

2 / 6 page

Jun. 16. 2008 / Rev. 0.1

2/6

* This specifications are subject to be changed without notice

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

ADT7221

Part List

Component

Description

Type

Value

U1*1

Composite type with a PNP transistor

and schottky barrier diode

FP103

PNP transistor

Chip transistor

MMBT589LT1

Output filter inductor

Chip inductor

47uH/590mA

Output filter capacitor

Tantalum capacitor

47uF/10V

Bypass capacitor

Tantalum capacitor

10uF/25V

Load capacitor for LDO

Tantalum capacitor

1uF/10V

Pin Configuration

*1 : For cost down , it is possible to use discrete component with a PNP transistor and a schottky barrier diode.

In this case, you make use the discrete components with proper electrical specification.

Table A shows the required key electrical limits. It is recommended to use PNP and schottky barrier diode

having equivalent specification in the Table A.

Component

Parameter

Ratings

Unit

Remarks

Collector to Emitter Voltage

-20

PNP

Collector Current

-2

Recommend

‘2SB1424’ by ROHM or Equivalent IC

Repetitive Peak Reverse Voltage

Schottky

Barrier Diode

Average Rectified Current

700

Recommend

‘RSX101M-30’ by ROHM or Equivalent

Table A : Selection guide for the discrete components

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