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AiT - SYNCHRONUS BOOST STEP-UP DC-DC CONVERTER

Numéro de référence A7533
Description SYNCHRONUS BOOST STEP-UP DC-DC CONVERTER
Fabricant AiT 
Logo AiT 





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A7533 fiche technique
AiT Semiconductor Inc.
www.ait-ic.com
A7533
0.85V STARTUP, 1MHZ, 300mA IOUT
SYNCHRONUS BOOST STEP-UP DC-DC CONVERTER
DESCRIPTION
The A7533 is a step-up converter that provides a
boosted output voltage from a low voltage source.
Because of its proprietary design, it starts up at a
very low input voltage down to 850mV, making it an
ideal choice for single cell alkaline/ NiMH battery
operations.
A switching frequency of 1MHz minimizes solution
footprint by allowing the use of tiny, low profile
inductors and ceramic capacitors. The current
mode PWM design is internally compensated,
reducing external parts count.
The A7533 is available in SOT-25 and SOT-89-3
Package.
ORDER INFORMATION
Package Type
Part Number
SOT-25
E5
A7533E5R-XX
A7533E5VR-XX
SOT-89-3
K3
A7533K3R-XX
A7533K3VR-XX
XX=Output , ADJ=Adjustable
Note
V: Green Package
R : Tape & Reel
AiT provides all Pb free products
Suffix “ V “ means Green Package
FEATURES
Up to 95% Efficiency
Output voltage accuracy ±3%
1MHz Switching Frequency allows small
inductor and output cap
Input boost-strapping allows using small or no
input cap
Low VIN Start-up Voltage down to 850mV Ideal
for Single Alkaline Cell operations
Maximum Output Current up to 300mA
Low Noise PWM control
Internally Compensated Current Mode Control
Internal Synchronous Rectifier
Logic Control Shutdown (IQ < 1uA)
Available in SOT-25 and SOT-89-3 Package.
APPLICATION
One to Three Cell Battery Operated Devices
Medical Instruments
Bluetooth Headsets
Flash-Based MP3 Players
Noise Canceling Headphones
TYPICAL APPLICATION
NOTE: Input capacitor (CIN = 0.47uF) and Output capacitor (COUT 4.7uF) are recommended in all application circuit.
REV1.1
- JUL 2010 RELEASED, JUL 2011 REVISED -
-1-

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