AAT1153 Datasheet, PDF (2/19 Pages) Advanced Analogic Technologies – 2A Step-Down Converter

DATA SHEET
AAT1153
2A Step-Down Converter
Pin Descriptions
Pin #
1
2
3
4, 6
5
7, 8
9, 10
Symbol
EN
IN
AIN
AGND
FB
LX
PGND
EP
Function
Enable pin. Active high. In shutdown, all functions are disabled drawing <1μA supply current. Do not leave
EN floating.
Power supply input pin. Must be closely decoupled to AGND with a 2.2μF or greater ceramic capacitor.
Analog supply input pin. Provides bias for internal circuitry.
Analog ground pin
Feedback input. Connect FB to the center point of the external resistor divider. The feedback threshold
voltage is 0.6V.
Switching node pin. Connect the output inductor to this pin.
Power ground pin
Power ground exposed pad. Must be connected to bare copper ground plane.
Pin Configuration
TDFN-10
(Top View)
EN 1
IN 2
AIN 3
AGND ⁴
FB/OUT ⁵
10 _PGND
9 PGND
8 LX
7 _LX
6 _AGND
1. FB pin for the adjustable voltage version (AAT1153IDE-0.6), OUT pin for the fixed voltage version (AAT1153IDE-1.8).
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201992B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 18, 2013