AAT1142IWP-1.8-T1 View Datasheet(PDF) - Advanced Analogic Technologies
Part Name
Description
MFG CO.
'AAT1142IWP-1.8-T1' PDF : 21 Pages View PDF
SwitchRegTM
PRODUCT DATASHEET
AAT1142
800mA Voltage-Scaling Step-Down Converter
Pin Descriptions
Pin Number
TSOPJW-12 TDFN33-12
1
12
2
11
3
10
4
9
5
8
6
7
7
8, 9, 10, 11
121
121
n/a
n/a
6
4, 5
3
1
2
EP
Symbol
LX
PGND
MODE/SYNC
SDA
SCL
EN/SET
FB
AGND
VIN
PVIN
N/C
Function
Connect the output inductor to this pin. The switching node is internally connected
to the drain of both high- and low-side MOSFETs.
Main power ground return pin. Connect to the output and input capacitor return.
Connect to ground for PFM/PWM mode and optimized efficiency throughout the load
range. Connect to high for low noise PWM Only operation under all operating condi-
tions. Connect to an external clock for synchronization (PWM Only).
I2C control pin: Data input.
I2C control pin: Clock input.
I2C enable pin. Pull high to enable the AAT1142; pull low to disable the AAT1142.
Also serves as S2Cwire input for programmable output voltages.
Feedback input pin. This pin is connected directly to the converter output for pro-
grammable output.
Ground connection pin.
Input voltage for the converter.
Input voltage for the power switches.
Not connected.
Exposed paddle (bottom); connect to ground as closely as possible to the device.
Pin Configuration
TSOPJW-12
(Top View)
TDFN33-12
(Top View)
LX 1
PGND 2
MODE/SYNC 3
SDA 4
SCL 5
EN/SET 6
12 VIN
11 AGND
10 AGND
9 AGND
8 AGND
7 FB
PVIN 1
N/C 2
VIN 3
AGND 4
AGND 5
FB 6
12 LX
11 PGND
10 MODE/SYNC
9 SDA
8 SCL
7 EN/SET
1. VIN and PVIN are tied together in the TSOPJW-12 package.
2
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1142.2009.08.1.1
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