AAT2510 Datasheet, PDF (2/19 Pages) Advanced Analogic Technologies – Dual 400mA, 1MHz Step-Down DC-DC Converter

DATA SHEET
AAT2510
Dual 400mA, 1MHz Step-Down DC/DC Converter
Pin Descriptions
Pin #
1, 4
2, 5
3, 6
7, 10
8, 11
9, 12
EP
Symbol
EN1, EN2
FB1, FB2
SGND1, SGND2
GND2, GND1
LX2, LX1
VIN2, VIN1
Function
Converter enable input. 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 floating. When not actively controlled, this pin can be tied directly to the source voltage
(VIN1, VIN2).
Feedback input pin. For fixed output voltage versions, this pin is connected to the converter out-
put, forcing the converter to regulate to the specified voltage. For adjustable versions, an external
resistive divider ties to this point and programs the output voltage to the desired value.
Signal ground. For external feedback, return the feedback resistive divider to this ground. For
internal fixed version, tie to the point of load return. See section on PCB layout guidelines and
evaluation board layout diagram.
Main power ground return. Connect to the input and output capacitor return. See section on PCB
layout guidelines and evaluation board layout diagram.
Output switching node that connects to the respective output inductor.
Input supply voltage. Must be closely decoupled to the respective power gnd.
Exposed paddle (bottom). Use properly sized vias for thermal coupling to the ground plane. See
section on PCB layout guidelines.
Pin Configuration
TDFN33-12
(Top View)
EN1 ¹
FB1 ²
SGND1 ³
EN2 ⁴
FB2 ⁵
SGND2 ⁶
12 _VIN1
11 _LX1
10 _GND1
9 _VIN2
8 _LX2
7 _GND2
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202020B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 19, 2013