器件名称: ADT7220
功能描述: power supply chip with 3.3V regulated output
文件大小: 117.6KB 共6页
简 介:ADT7220
General Description
The ADT7220 is a power supply chip with 3.3V regulated output. It is composed of one PWM controller and one LDO regulator. It provides the pure and excellent regulated output voltage.
1 A33 2 3 6 5 4
Package outline of the ADT7220
Features
Input voltage range : 7V to 15V Regulated output voltage : 3.3V 350mA output load current available Externally composed LDO pass transistor 500kHz fixed frequency internal oscillator Over voltage protection
Applications
DC-DC Converter for 3.3V output CCD Camera module Navigation & Portable Devices
PWM controller with built-in compensation components
Small outline SOT-26 package (2.9mm x 1.6mm body)
Typical Application Circuit
VIN (12V)
C2
VIN
DRV
Q1
A33
GND
OUT C3
OUT
PWM
FB
(ADT7220)
L1 U1 C1
* This specifications are subject to be changed without notice
Jun. 16. 2008 / Rev. 0.1
1/6
http://www.ad-tech.co.kr
ADT7220
Part List
Component U1*1 Q1 L1 C1 C2 C3 Description Composite type with a PNP transistor and schottky barrier diode PNP transistor Output filter inductor Output filter capacitor Bypass capacitor Load capacitor for LDO IC Chip transistor Chip inductor Tantalum capacitor Tantalum capacitor Tantalum capacitor Type FP103 MMBT589LT1 47uH/590mA 47uF/10V 10uF/25V 1uF/10V Value
*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 specificati……
