18V 100mA Step-Up Converter
General Description
The AAT1230 is a high frequency, high efficiency
boost converter capable of 18V maximum output
voltage. The internal power switch can deliver
100mA load current. It is the ideal power solution to
power OLED, LCD, and CCD applications operat-
ing from a single cell lithium-ion battery.
Hysteretic control provides up to 2MHz switching
frequency and fast response to load transients with
small, low-cost external components. The fully
integrated control IC simplifies the design while
reducing the total PCB footprint. The AAT1230
offers a true load disconnect feature which isolates
the load from the power source when EN/SET is
pulled low. This eliminates leakage current and
maintains zero voltage at the output while disabled.
The output voltage can be dynamically set by acti-
vating one of two reference levels (FB1 or FB2)
through the SEL logic pin. Optionally, AnalogicTech’s
Simple Serial Control™ (S
2
Cwire™) single wire
interface provides dynamic programmability across
a wide output voltage range through the EN/SET pin.
The AAT1230 is available in a Pb-free, thermally-
enhanced 16-pin 3x4mm TDFN low-profile pack-
age or a Pb-free 12-pin TSOPJW package.
AAT1230
Features
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SwitchReg
™
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•
•
•
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V
IN
Range: 2.7V to 5.5V
Maximum Output: 18V @ 100mA
True Load Disconnect
Dynamic Voltage Control Options
Hysteretic Control
— No External Compensation Components
— Excellent Load Transient Response
— High Efficiency at Light Load
Up to 2MHz Switching Frequency
Ultra-Small Inductor and Capacitors
Integrated Low R
DS(ON)
MOSFET Switches
Up to 85% Efficiency
<1µA Shutdown Current
Integrated Soft Start
Cycle-by-Cycle Current Limit
Short-Circuit, Over-Temperature Protection
Available in TSOPJW-12 or TDFN34-16
Package
-40°C to +85°C Temperature Range
Applications
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CCD Bias Circuit
Digital Still Cameras
LCD Bias Circuit
Mobile Handsets
MP3 Players
OLED Displays
PDAs and Notebook PCs
Typical Application
L
1
2.2µH
Input:
2.7V~5.5V
VP
LIN
D
1
Schottky
18V @ 100mA
C
1
2.2µF
VIN
AAT1230
SW
FB1
R
1
78.7kΩ
R
2
562Ω
R
3
4.99kΩ
C
2
2.2µF, 25V
PGND
Enable/Set
Select
EN/SET
SEL
GND
FB2
1230.2006.03.1.0
1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
