PRODUCT DATASHEET
AAT1162
SwitchReg
TM
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-pow-
er-range regulated 12V-powered industrial applications.
The internal power switches are capable of delivering up
to 1.5A to the load.
The AAT1162 is a highly integrated device, simplifying
system-level design. Minimum external components 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 efficiency. The high switch-
ing frequency allows the use of small external compo-
nents. The low current shutdown feature disconnects the
load from V
IN
and drops shutdown current to less than
1μA.
The AAT1162 is available in a Pb-free, space-saving,
thermally-enhanced 16-pin TDFN34 packageand is rated
over an operating temperature range of -40°C to +85°C.
12V, 1.5A Step-Down DC/DC Converter
Features
• 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
C6
10μF
R4
10
C2
0.1μF
EN
DGND
AIN
C8
1μF
COMP
R5
24k
C7
330pF
C9
1μF
LDO
PGND
AGND
LX
2.2 to 4.7μH
L1
Output:
0.6V min,
1.5A max
AAT1162
FB
C3
22μF
1162.2008.01.1.3
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