AAT1110_06 Datasheet, PDF (1/19 Pages) Advanced Analogic Technologies – Fast Transient 800mA Step-Down Converter

AAT1110
Fast Transient 800mA Step-Down Converter
General Description
Features
SwitchReg^™
The AAT1110 SwitchReg™ is a member of
AnalogicTech's Total Power Management IC™
(TPMIC™) product family. It is a 1.4MHz step-
down converter with an input voltage range of 2.7V
to 5.5V and output as low as 0.6V. Its low supply
current, small size, and high switching frequency
make the AAT1110 the ideal choice for portable
applications.
The AAT1110 is available in either a fixed version
with internal feedback or a programmable version
with external feedback resistors. It can deliver up
to 800mA of load current while maintaining a low
27µA no load quiescent current. The 1.4MHz
switching frequency minimizes the size of external
components while keeping switching losses low.
The AAT1110 feedback and control delivers excel-
lent load regulation and transient response with a
small output inductor and capacitor.
The AAT1110 is designed to maintain high efficien-
cy throughout the operating range and provides
fast turn-on time.
The AAT1110 is available in a space-saving
2.0x2.1mm SC70JW-8 package and is rated over
the -40°C to +85°C temperature range.
• V_IN Range: 2.7V to 5.5V
• V_OUT Fixed or Adjustable from 0.6V to V_IN
• 27µA No Load Quiescent Current
• Output Current Up to 800mA
• 1.4MHz Switching Frequency
• 120µs Soft Start
• Fast Load Transient
• Over-Temperature Protection
• Current Limit Protection
• 100% Duty Cycle Low-Dropout Operation
• <1µA of Shutdown Current
• SC70JW-8 Package
• Temperature Range: -40°C to +85°C
Applications
• Cellular Phones
• Digital Cameras
• Handheld Instruments
• Microprocessor / DSP Core / IO Power
• PDAs and Handheld Computers
• USB Devices
Typical Application (Fixed Output Voltage)
V_IN
C2
4.7μF
U1
AAT1110
3 _VIN
LX ⁴
1 _EN
OUT ²
5 _{AGND PGND} 7
8 _{PGND PGND} 6
L1
4.7μH
V_O
C1
22μF
1110.2006.04.1.0
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