AAT1162
12V, 1.5A Step-Down DC/DC Converter
General Description
The AAT1162 is an 800kHz high efficiency step-
down DC/DC converter. With a wide input voltage
range of 4.0V to 13.2V, the AAT1162 is an ideal
choice for dual-cell Lithium-ion battery-powered
devices and mid-power-range regulated 12V-pow-
ered industrial applications. The internal power
switches are capable of delivering up to 1.5A to the
load.
The AAT1162 is a highly integrated device, simpli-
fying system-level design. Minimum external com-
ponents are required for the converter.
The AAT1162 optimizes efficiency throughout the
entire load range. It operates in a combination
PWM/Light Load mode for improved light-load effi-
ciency. The high switching frequency allows the use
of small external components. The low current shut-
down feature disconnects the load from V
IN
and
drops shutdown current to less than 1µA.
The AAT1162 is available in a Pb-free, space-sav-
ing, thermally-enhanced 16-pin TDFN34 package-
and is rated over an operating temperature range
of -40°C to +85°C.
Features
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SwitchReg
™
Input Voltage Range: 4.0V to 13.2V
Up to 1.5A Load Current
Fixed or Adjustable Output:
— Output Voltage: 0.6V to V
IN
Low 115µA No-Load Operating Current
Less than 1µA Shutdown Current
Up to 96% Efficiency
Integrated Power Switches
800kHz Switching Frequency
Soft Start Function
Short-Circuit and Over-Temperature Protection
Minimum External Components
TDFN34-16 Package
Temperature Range: -40°C to +85°C
Applications
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Distributed Power Systems
Industrial Applications
Laptop Computers
Portable DVD Players
Portable Media Players
Set-Top Boxes
TFT LCD Monitors and HDTVs
Typical Application
Input:
4.0V ~ 13.2V
IN
C
IN
EN
DGND
AIN
LX
L
Output:
0.6V min,
1.5A max
2.2µH
AAT1162
FB
C
OUT
47µF
COMP
LDO
PGND
AGND
1162.2007.09.1.2
1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
