AAT1230_07 Datasheet, PDF (1/21 Pages) Advanced Analogic Technologies – 18V 100mA Step-Up Converter

AAT1230/1230-1
18V 100mA Step-Up Converter
General Description
Features
SwitchReg^™
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 inte-
grated control IC simplifies the design while reduc-
ing the total PCB footprint. The AAT1230/1230-1
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 AAT1230/1230-1 are available in a Pb-free,
thermally-enhanced 16-pin 3x4mm TDFN low-pro-
file package or a Pb-free 12-pin TSOPJW package.
• 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
Typical Application
V_BAT
3.6V
C₁
2.2μF
Enable/Set
Select
• CCD Bias Circuit
• Digital Still Cameras
• LCD Bias Circuit
• Mobile Handsets
• MP3 Players
• OLED Displays
• PDAs and Notebook PCs
VP
VIN
LIN
AAT1230/
AAT1230-1
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
1230.2007.06.1.6
1