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A6902D Datasheet(PDF) 1 Page - STMicroelectronics

Part # A6902D
Description  Up to 1A step down switching regulator with adjustable current limit for automotive applications
PDF  12 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

A6902D Datasheet(HTML) 1 Page - STMicroelectronics

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November 2007
Rev 2
1/12
12
A6902D
Up to 1A step down switching regulator with adjustable
current limit for automotive applications
Features
■ Qualified following the AEC-Q100
requirements (temperature Grade 3), see
PPAP for more details.
■ Temperature range -40°C to 85°C
■ Up to 1A DC output current
■ Operating input voltage from 8V to 36V
■ Output voltage adjustable from 1.235V to 35V
■ Precise 3.3V (±2%) reference voltage
■ 250kHz Internally fixed frequency
■ Voltage feedforward
■ Zero load current operation
■ Internal current limiting
■ Protection against feedback disconnection
■ Thermal shutdown
Applications
■ Dedicated to automotive applications
■ Adjustable current generator
■ Simple step-down converters with adjustable
current limit
Figure 1.
Typical application
Description
The A6902D is a complete and simple step down
switching regulator with adjustable current limit,
capable to deliver up to 1A at output voltages from
1.2V to 35V. The internal robust P-channel DMOS
transistor with a typical of 250m
Ω assures high
efficiency and a minimum dropout even at high
output current level. The internal fixed switching
frequency of 250kHz, and the SO-8 package pin
allow to built an ultra compact DC/ DC converter
with a minimum board space.
SO-8
R1
5.6kO
R2
3.3kO
R3
5.1kO
Rsense
100mO
C1
10µF
35V
C2
22nF
C3
220pF
C4
100µF
10V
L1 22µH
D1
STPS340U
L6902D
VCC
VREF
COMP
GND
FB
OUT
CS+
CS-
VIN=8V to 36V
VOUT=3.3V
VIN=8V to 36V
R1
5.6kO
R2
3.3kO
R3
5.1kO
Rsense
100mO
C1
10µF
35V
C2
22nF
C3
220pF
C4
100µF
10V
L1 22µH
D1
STPS340U
L6902D
VCC
VREF
COMP
GND
FB
OUT
CS+
CS-
VIN=8V to 36V
VOUT=3.3V
VIN=8V to 36V
www.st.com


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