PRODUCT DATASHEET
AAT2713
SystemPower
TM
Pin Descriptions
Pin #
1
2
4, 3
5, 16
6, 15
7, 14
8, 13
Low Noise Dual 600mA Step-Down Converter with Synchronization
Symbol
PS
AGND
FB1, FB2
VIN1, VIN2
N/C
LX1, LX2
PGND1, PGND2
Function
Phase shift pin. Logic high enables the PS feature which forces the two converters to operate
180° out of phase when both are in forced PWM mode.
Analog ground. Return the feedback resistive divider to this ground. See section on PCB layout
guidelines and evaluation board layout diagram.
Feedback input pins. An external resistive divider ties to each and programs the respective out-
put voltage to the desired value.
Input supply voltage pins. Must be closely decoupled to the respective PGND.
Not connected
Output switching nodes that connect to the respective output inductor.
Main power ground return. Connect to the input and output capacitor return. See section on PCB
layout guidelines and evaluation board layout diagram.
Converter enable input pins. A logic high enables the converter channel. A logic low forces the
channel into shutdown mode, reducing the channel supply current to less than 1μA. This pin
should not be left
fl
oating. When not actively controlled, this pin can be tied directly to VIN and/
or VCC.
Control circuit power supply. Connect to the higher voltage of VIN1 or VIN2.
Logic low enables light load mode operation for light loads and
fi
xed-frequency PWM operation
for heavy loads. Logic high forces low noise PWM operation under all operating conditions. Con-
nect to an external clock for synchronization (PWM only).
Exposed paddle (bottom). Use properly sized vias for thermal coupling to the ground plane. See
section on PCB layout guidelines.
10, 9
11
12
EP
EN1, EN2
VCC
MODE/SYNC
Pin Configuration
QFN33-16
(Top View)
PGND2
LX2
N/C
VIN2
16
15
14
13
PS
AGND
FB2
FB1
1
2
3
4
5
6
7
8
12
11
10
9
MODE/SYNC
VCC
EN1
EN2
2
www.analogictech.com
PGND1
LX1
N/C
VIN1
2713.2008.01.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
