ADT7221 ADTECH [ADTech], ADT7221 Datasheet

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ADT7221

Manufacturer Part Number
ADT7221
Description
power supply chip with 5V regulated output
Manufacturer
ADTECH [ADTech]
Datasheet
Jun. 16. 2008 / Rev. 0.1
General Description
Typical Application Circuit
Features
• Input voltage range : 7V to 15V
• Regulated output voltage : 5V
• 350mA output load current available
• PWM controller with built-in compensation components
• Externally composed LDO pass transistor
• 500kHz fixed frequency internal oscillator
• Over voltage protection
• Small outline SOT-26 package (2.9mm x 1.6mm body)
The ADT7221 is a power supply chip with 5V
regulated output. It is composed of one PWM
controller and one LDO regulator. It provides the
pure and excellent regulated output voltage.
(12V)
VIN
C2
U1
* This specifications are subject to be changed without notice
L1
VIN
GND
PWM
(ADT7221)
C1
1/6
DRV
OUT
FB
Applications
• DC-DC Converter for 5V output
• CCD Camera module
• Navigation & Portable Devices
Package outline of the ADT7221
Q1
C3
6
1
http://www.ad-tech.co.kr
A50
5
2
OUT
4
3
ADT7221

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ADT7221 Summary of contents

Page 1

... General Description The ADT7221 is a power supply chip with 5V regulated output composed of one PWM controller and one LDO regulator. It provides the pure and excellent regulated output voltage. Features • Input voltage range : 7V to 15V • Regulated output voltage : 5V • 350mA output load current available • ...

Page 2

... Chip inductor Tantalum capacitor Tantalum capacitor Tantalum capacitor Table A. Parameter Ratings - 700 2/6 Type Value FP103 MMBT589LT1 47uH/590mA 47uF/10V 10uF/25V 1uF/10V Unit Remarks V Recommend ‘2SB1424’ by ROHM or Equivalent Recommend ‘RSX101M-30’ by ROHM or Equivalent http://www.ad-tech.co.kr ADT7221 ...

Page 3

... G Ground O D Switching output I A Feedback voltage input O A LDO output I/O A LDO pass transistor drive signal IO : Input/Output pin Internal REG. OSC BIAS (500kHz) REF + - ERROR AMP ZFB LDO DRV OUT 3/6 ADT7221 Description + - PWM Pre- Modulator DRIVER http://www.ad-tech.co.kr PWM ...

Page 4

... IN Condition I =0mA O I =300mA O I =300mA =300mA O (measured at FB pin voltage) I =300mA 350mA O V =7V to 15V, I =350mA IN O 4/6 ADT7221 Min. Typ. Max 265 -65 - +150 - - +150 - 301.2 - Min. Typ. Max. 7.0 12.0 15.0 - +125 - - ...

Page 5

... This specifications are subject to be changed without notice Jun. 16. 2008 / Rev. 0 550 540 530 520 510 500 60 80 100 5/6 ADT7221 Io vs. Efficiency (VIN=12V) 100 200 300 Io (mA) Temp vs. Frequency (VIN=12V / Io=300mA Temp ( ℃ ) http://www.ad-tech.co.kr 400 80 100 ...

Page 6

... Package ; SOT-26, 2.9mm x 1.6mm body (units : mm) * This specifications are subject to be changed without notice Jun. 16. 2008 / Rev. 0.1 http://www.ad-tech.co.kr 6/6 ADT7221 ...

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