AAT2784 Analogic Corporation, AAT2784 Datasheet - Page 2

• Manufacturer Part Number: AAT2784
• Manufacturer: Analogic Corporation

Pin Descriptions
Pin Configuration
2
2
SystemPower
SystemPower
Pin #
10
11
12
13
14
15
16
EP
1
2
3
4
5
6
7
8
9
Symbol
PGND2
PGND3
PGND1
VP1_2
AGND
FB2
EN1
EN2
EN3
FB3
VP3
FB1
LX3
LX1
LX2
IN
EP
TM
TM
Function
Power ground return pin 2. Connect to the output and input capacitor return.
Feedback input pin for channel 2. Connect an external resistor divider to this pin to program the output volt-
age to the desired value.
Enable pin for channel 1. Active high.
Enable pin for channel 2. Active high.
Signal Ground.
Input supply pin for device. Supplies bias for the internal circuitry.
Enable pin for channel 3. Active high.
Feedback input pin for channel 3. Connect an external resistor divider to this pin to program the output volt-
age to the desired value.
Power ground return for channel 3. Connect to the output and input capacitor return.
Power switching node for channel 3. Output switching node connects to the output inductor.
Input power supply pin for channel 3. Must be closely decoupled.
Feedback input pin for channel 1. Connect an external resistor divider to this pin to program the output volt-
age to the desired value.
Power ground return for channel 1. Connect to the output and input capacitor return.
Power switching node for channel 1. Output switching node connects to the output inductor.
Input power supply pin for channels 1 and 2. Must be closely decoupled.
Power switching node for channel 2. Output switching node connects to the output inductor.
Exposed pad. Connect to ground directly under the device. Use properly sized vias for thermal coupling to
the ground plane. See section on PCB layout guidelines.
PGND2
AGND
EN1
EN2
EN3
FB2
FB3
w w w . a n a l o g i c t e c h . c o m
w w w . a n a l o g i c t e c h . c o m
IN
1
2
3
4
5
6
7
8
TDFN34-16
(Top View)
3-Channel Step-Down DC/DC Converter
3-Channel Step-Down DC/DC Converter
16
15
14
13
12
11
10
9
LX2
VP1_2
LX1
PGND1
FB1
VP3
LX3
PGND3
PRODUCT DATASHEET
PRODUCT DATASHEET
AAT2784
AAT2784
2784.2007.11.1.1
2784.2007.11.1.1