 English |
|
|
|
|
|
|
|
| AAT2511 Datasheet, PDF (8/20 Pages) Advanced Analogic Technologies – Dual 600mA, 1MHz Step-Down DC/DC Converter | |||
| |||
| ◁ |
AAT2511
Dual 600mA, 1MHz Step-Down DC/DC Converter
Functional Block Diagram
FB1
VIN1
EN1
DH
Comp.
Err.
Amp.
Voltage
Reference
Control
Logic
Logic
DL
LX1
GND1
SGND1
FB2
EN2
See
Note
DH
Comp.
Err.
Amp.
See
Note
Voltage
Reference
Control
Logic
Logic
DL
VIN2
LX2
GND2
SGND2
Note: Internal resistor divider included for â¥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.
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.
8
2511.2006.02.1.2
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese