ADT7220 ADTECH [ADTech], ADT7220 Datasheet - Page 2

• Manufacturer Part Number: ADT7220
• Description: power supply chip with 3.3V regulated output
• Manufacturer: ADTECH [ADTech]

Jun. 16. 2008 / Rev. 0.1
Part List
Pin Configuration
*1 : For cost down , it is possible to use discrete component with a PNP transistor and a schottky barrier diode.
Barrier Diode
Component
Component
Schottky
having equivalent specification in the
Table A
In this case, you make use the discrete components with proper electrical specification.
Table A
PNP
U1
Q1
C1
C2
C3
L1
*1
shows the required key electrical limits. It is recommended to use PNP and schottky barrier diode
: Selection guide for the discrete components
Collector to Emitter Voltage
Collector Current
Repetitive Peak Reverse Voltage
Average Rectified Current
Composite type with a PNP transistor
and schottky barrier diode
PNP transistor
Output filter inductor
Output filter capacitor
Bypass capacitor
Load capacitor for LDO
* This specifications are subject to be changed without notice
Parameter
Description
Table
A.
2/6
1
2
3
Ratings
700
-20
30
-2
IC
Chip transistor
Chip inductor
Tantalum capacitor
Tantalum capacitor
Tantalum capacitor
6
5
4
Unit
mA
V
A
V
Type
Recommend
‘2SB1424’ by ROHM or Equivalent IC
Recommend
‘RSX101M-30’ by ROHM or Equivalent
http://www.ad-tech.co.kr
Remarks
FP103
MMBT589LT1
47uH/590mA
47uF/10V
10uF/25V
1uF/10V
Value
ADT7220