AAT2510
Dual 400mA, 1MHz Step-Down DC-DC Converter
Functional Block Diagram
FB1
VIN1
DH
Comp.
Err.
Amp.
LX1
Logic
Voltage
Reference
DL
Control
EN1
GND1
Logic
VIN2
See
Note
SGND1
DH
Comp.
Err.
Amp.
FB2
LX2
Logic
Voltage
Reference
DL
Control
EN2
GND2
Logic
See
Note
SGND2
Note: Internal resistor divider included for ≥1.2V versions. For low voltage versions, the feedback pin is tied directly to the error amplifier input.
Both converters are designed to operate with an
input voltage range of 2.7V to 5.5V. The output
Operation
voltage ranges from 0.6V to the input voltage for
Device Summary
the internally fixed version and up to 2.5V for the
The AAT2510 is a constant frequency peak current
externally adjustable version. The 0.6V fixed model
mode PWM converter with internal compensation.
shown in Figure 1 is also the adjustable version
Each channel has independent input, enable, feed-
and is externally programmable with a resistive
back, and ground pins with non-synchronized
divider as shown in Figure 2. The converter MOS-
1MHz clocks.
FET power stage is sized for 400mA load capabili-
ty with up to 96% efficiency. Light load efficiency
exceeds 80% at a 500µA load.
8
2510.2005.08.1.5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
