PRODUCT DATASHEET
AAT1160
SwitchReg
TM
General Description
The AAT1160 is an 800kHz high efficiency step-down
DC/DC converter. With a wide input voltage range of
4.0V to 13.2V, the AAT1160 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 3A to the load.
The AAT1160 is a highly integrated device, simplifying
system-level design. Minimum external components are
required for the converter.
The AAT1160 optimizes efficiency throughout the entire
load range. It operates in a combination PWM/Light Load
mode for improved light-load efficiency. It can also
operate in a forced Pulse Width Modulation (PWM) mode
for easy control of the switching noise as well as faster
transient response. The high switching frequency allows
the use of small external components. The low current
shutdown feature disconnects the load from V
IN
and
drops shutdown current to less than 1μA.
The AAT1160 is available in a Pb-free, space-saving,
thermally-enhanced 16-pin TDFN34 package and is rated
over an operating temperature range of -40°C to
+85°C.
12V, 3A Step-Down DC/DC Converter
Features
• Input Voltage Range: 4.0V to 13.2V
• Up to 3A Load Current
• Fixed or Adjustable Output:
▪
Output Voltage: 0.6V to V
IN
• Low 150μA No-Load Operating Current
• Less than 1μA Shutdown Current
• Up to 96% Efficiency
• Integrated Power Switches
• 800kHz Switching Frequency
▪
Synchronizable to External Clock
▪
Forced PWM or Light Load Mode
• Soft Start Function
• Short-Circuit and Over-Temperature Protection
• Minimum External Components
• TDFN34-16 Package
• Temperature Range: -40°C to +85°C
Applications
•
•
•
•
•
•
•
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
22μF
R4
10
C2
0.1μF
EN
DGND
AIN
C8
1μF
SYNC
COMP
R5
50k
C7
150pF
C9
1μF
LDO
PGND
AGND
LX
2.2 to 3.8μH
R3
432k
C3, C4
2x22μF
R6
59k
L
Output:
0.94 x Input max
AAT1160
FB
1160.2007.11.1.1
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