AAT2511IWP-AA-T1 ANALOGICTECH [Advanced Analogic Technologies], AAT2511IWP-AA-T1 Datasheet - Page 8

• Manufacturer Part Number: AAT2511IWP-AA-T1
• Description: Dual 600mA, 1MHz Step-Down DC/DC Converter
• Manufacturer: ANALOGICTECH [Advanced Analogic Technologies]

Functional Block Diagram
Note: Internal resistor divider included for ≥1.2V versions. For low voltage versions, the feedback pin is tied directly to the error amplifier input.
Operation
Device Summary
The AAT2511 is a constant frequency peak current
mode PWM converter with internal compensation.
Each channel has independent input, enable, feed-
back, and ground pins with non-synchronized
1MHz clocks.
8
SGND1
EN2
FB2
EN1
FB1
Note
See
Note
See
Reference
SGND2
Voltage
Reference
Voltage
Dual 600mA, 1MHz Step-Down DC/DC Converter
Amp.
Amp.
Err.
Err.
Control
Logic
Control
Logic
Comp.
Comp.
Both converters are designed to operate with an
input voltage range of 2.7V to 5.5V. The output
voltage ranges from 0.6V to the input voltage. The
0.6V fixed model shown in Figure 1 is also the
adjustable version and is externally programmable
with a resistive divider as shown in Figure 2. The
converter MOSFET power stage is sized for
600mA load capability with up to 97% efficiency.
Light load efficiency exceeds 80% at a 500µA load.
Logic
Logic
DH
DH
DL
DL
VIN1
AAT2511
LX1
GND1
VIN2
LX2
GND2
2511.2006.02.1.2