A7501
AiT Semiconductor Inc.
www.ait-ic.com
DC-DC CONVERTER/BOOST(STEP-UP)
SUPER-SMALL PACKAGE VFM CONTROL
STEP-UPSWITCHING REGULATOR
DESCRIPTION
FEATURES
The A7501 Series is a CMOS VFM-control step-up
switching regulator that mainly consists of a reference
voltage source, an oscillator, and a comparator.
Enabling products with a low ripple over a wide
range, high efficiency, and high output current.
Products with a fixed duty ratio of 75 %（Lower Output
Voltage）or 88%(Higher Output Voltage) are also
available. With the A7501 Series, a step-up switching
regulator can be configured by using an external coil,
capacitor, and diode. A protection circuit turns off the
built-in MOSFET when the voltage at the CONT pin
exceeds the limit to prevent it from being damaged.
This feature, along with the mini package and low
current consumption, makes the A7501 Series ideal
for applications such as the power supply unit of
portable equipment.
Low voltage operation: Start up at 0.9V min
(IOUT=1mA) guaranteed
Low input current: During maximum operation:
18μA (VOUT=3.3V, typ.)
Duty ratio: 77% Built-in fixed-type PFM
controller
External parts: Coil, capacitor, and diode
Output voltage: Settable to between
2.5V to 5.5V , accuracy of 2%
Available in SOT-89-3 and SOT-23 Packages
APPLICATION
Power supply for portable equipment such as
digital cameras, electronic notebooks, and PDA
Power supply for audio equipment such as
portable CD/MD players
Constant voltage power supply for cameras,
video equipment and communications
equipment
A7501 is available in SOT-89-3 and SOT-23
packages.
Power supply for microcomputers
TYPICAL APPLICATION CIRCUIT
ORDER INFORMATION
Package Type
SOT-89-3
Part Number
A7501K3R-XX
A7501K3VR-XX
A7501E3R-XX
A7501E3VR-XX
K3
E3
SOT-23
XX: Output Voltage,
27=2.7V, 30=3.0V,
Note
R: Tape & Reel
V: Halogen free Package
AiT provides all RoHS products
Suffix “ V “ means Halogen free Package
Components Normal Value: C1=10uF, C2=47uF,
L=22uH, D1 1N5818
REV1.3
- MAR 2009 RELEASED, JUN 2013 UPDATE-
- 1 -
AITSEMI [ AiT Semiconductor ]
