AiT Semiconductor Inc.
A7115B
www.ait-ic.com DC-DC CONVERTER BUCK (STEP-DOWN)
1.5A 2MHz SYNCHRONOUS
REV1.4 - MAY 2018 RELEASED, SEP 2022 UPDATED - - 1 -
DESCRIPTION FEATURES
The A7115B is a 2MHz high-efficiency, PWM
step-down converter with integrated main
switch and synchronous rectifier that is ideal for
powering portable equipment that runs from a
single Li-on or Li-Polymer battery.
The A7115B can supply up to up to 1.5A load
current from a 2.6V to 5.5V input voltage. The
output voltage can be as low as 0.6V.
The A7115B features include <1uA shutdown
current, small external components, such as
ceramic input and output caps, as well as small
inductors, while still providing low output
ripples. This low noise output along with its
excellent efficiency achieved by the internal
synchronous rectifier, making A7115B an ideal
replacement for large power consuming linear
regulators. Internal soft-start control circuitry
reduces inrush current. Short-circuit and
thermal shutdown protection improves design
reliability.
The A7115B is available in SOT-25 and DFN6
(2x2) packages.
High efficiency: up to 97%
2MHz switching frequency
Up to 1.5A Load current
2.6V to 5.5V input Voltage Rage
Current mode control
Low dropout 100% duty operation
Internal compensation and soft-start
Reference 0.6V
Logic control shutdown (I
Q
<1uA)
Thermal shutdown, UVLO
Available in SOT-25 and DFN6 (2x2) packages
APPLICATION
Cellular phones
Microprocessors and DSP Core Supplies
PDA and Smart Phones
MP3 and Portable Media Players
Digital Still and Video Cameras
Portable Instruments
Set Top Box
Wireless and DSL modems
USB supplied devices in notebooks
ORDERING INFORMATION TYPICAL APPLICATION
Package Type Part Number
SOT-25
SPQ: 3,000pcs/Reel
E5
A7115BE5R
A7115BE5VR
DFN6
SPQ: 3,000pcs/Reel
J6
A7115BJ6R
A7115BJ6VR
Note
V: Halogen free Package
R: Tape & Reel
AiT provides all RoHS products
A7115B external Inductor suggest
AiT Semi’s PIA2512L-1R0M & PIA2512L-2R2M
AiT Semiconductor Inc.
A7115B
www.ait-ic.com DC-DC CONVERTER BUCK (STEP-DOWN)
1.5A 2MHz SYNCHRONOUS
REV1.4 - MAY 2018 RELEASED, SEP 2022 UPDATED - - 2 -
PIN DESCRIPTION
Top View
Top View
Pin #
Symbol Function
SOT-25
DFN6
(2x2)
1 2 EN
Enable pin for the IC. Drive the pin to high to enable the part,
and low to disable
2 5 GND Ground.
3 4 SW
Inductor connection. Connect an inductor between SW and the
regulator output.
4 3 V
IN
Supply voltage.
5 6 FB
Feedback input. Connect an external resistor divider from the
output to FB and GND to set the output to a voltage between
0.6V and V
IN
- 1 NC No Connection