18V 100mA Step-Up Converter
General Description
The AAT1230/1230-1 is a high frequency, high effi-
ciency boost converter capable of 18V maximum
output voltage. The internal power switch can deliv-
er 100mA load current. It is the ideal power solution
to power OLED, LCD, and CCD applications oper-
ating 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
AAT1230/1230-1 offers a true load disconnect fea-
ture which isolates the load from the power source
when EN/SET is pulled low. This eliminates leak-
age current and maintains zero voltage at the out-
put 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 AAT1230/1230-1 are available in a Pb-free,
thermally-enhanced 16-pin 3x4mm TDFN low-pro-
file package or a Pb-free 12-pin TSOPJW package.
AAT1230/1230-1
SwitchReg
™
Features
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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
Two Turn-On Time Options
— AAT1230: T
SS
= 0.35ms
— AAT1230-1: T
SS
= 3.5ms
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
L
1
2.2µH
LIN
Typical Application
VP
VIN
D
1
Schottky
18V @ 100mA
V
BAT
3.6V
C
1
2.2µF
AAT1230/
AAT1230-1
PGND
SW
R
1
78.7kΩ
R
2
562Ω
R
3
4.99kΩ
C
2
2.2µF, 25V
FB1
Enable/Set
Select
EN/SET
SEL
GND
FB2
1230.2006.10.1.4
1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
