A6902D_08 Datasheet, PDF (1/12 Pages) STMicroelectronics – Up to 1 A step down switching regulator with adjustable current limit for automotive applications

A6902D
Up to 1 A 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 1 A DC output current
■ Operating input voltage from 8 V to 36 V
■ Output voltage adjustable from 1.235 V to 35 V
■ Precise 3.3 V (±2 %) reference voltage
■ 250 kHz Internally fixed frequency
■ Voltage feedforward
■ Zero load current operation
■ Internal current limiting
■ Protection against feedback disconnection
■ Thermal shutdown
Applications
■ Automotive applications
■ Adjustable current generator
■ Simple step-down converters with adjustable
current limit
SO-8
Figure 1. Application schematic
V_IN=8V to 36V
C1
10µF
35V
V_IN=8V to 36V
C3
220pF
V_CC
V_REF
COMP
C2
22nF
R3
5.1kO
L6902D
GND
OUT
CS+
CS-
FB
L1 22µH
D1
STPS340U
Rsense
100mO
V_OUT=3.3V
R1
5.6kO
R2
3.3kO
C4
100µF
10V
May 2008
Rev 3
1/12
www.st.com
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