APW7101
1.5MHz, 600mA, Synchronous Buck Regulator
Features
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600mA Output Current
2.5V to 5.5V Input Voltage Range
1.5MHz Constant Frequency Operation
Low Dropout Operation at 100% Duty Cycle
Synchronous Topology:
No Schottky Diode Required
0.6V Low Reference Voltage
Shutdown Mode Supply Current Under 1µA
Current Mode Operation for Excellent Line and
Load Transient Response
Over-Temperature Protection
Over Current Protection
SOT-23-5 Package
Lead Free and Green Devices Available
(RoHS Compliant)
General Description
The APW7101 is a high efficiency monolithic synchronous
buck regulator. APW 7101 operates with a constant
1.5MHz switching frequency and using the inductor cur-
rent as a controlled quantity in the current mode
architecture. The device is available in an adjustable ver-
sion and fixed output voltages of 1.5V and 1.8V. The 2.5V
to 5.5V input voltage range makes the APW7101 ideally
suited for single Li-Ion battery powered applications.
100% duty cycle provides low dropout operation, extend-
ing battery life in portable electrical devices. The internally
fixed 1.5MHz operating frequency allows the use of small
surface mount inductors and capacitors. The synchro-
nous switches included inside increase the efficiency and
eliminate the need for an external Schottky diode. Low
output voltages are easily supported with the 0.6V feed-
back reference voltage. The APW7101 is available in a
low profile SOT package for saving the printed circuit
board area.
Applications
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Cellular Telephones
Personal Information Appliances
Wireless and DSL Modems
MP3 Players
Digital Still Cameras
Portable Instruments
Pin Configuration
Top View
RUN 1
GND 2
SW 3
APW7101 ADJ
Top View
RUN 1
GND 2
SW 3
4 V
IN
5 V
OUT
4 V
IN
5 V
FB
APW7101 1.5V/1.8V
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Copyright
©
ANPEC Electronics Corp.
Rev. A.4 - Jun., 2008
1
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
