AAT1230 Datasheet, PDF (1/21 Pages) Advanced Analogic Technologies – 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™ (S²Cwire™) 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.
Typical Application
AAT1230
18V 100mA Step-Up Converter
Features
SwitchReg^™
• 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
• CCD Bias Circuit
• Digital Still Cameras
• LCD Bias Circuit
• Mobile Handsets
• MP3 Players
• OLED Displays
• PDAs and Notebook PCs
Input:
2.7V~5.5V
Enable/Set
Select
C₁
2.2µF
VP
LIN
VIN
AAT1230
SW
PGND
FB1
EN/SET
FB2
SEL _GND
L₁
2.2µH
D₁
Schottky 18V @ 100mA
R₁
78.7kΩ
R₂
562Ω
R₃
4.99kΩ
C₂
2.2µF, 25V
1230.2006.03.1.0
1