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APW7290 fiches techniques PDF

ANPEC - 1A Synchronous Buck Regulator

Numéro de référence APW7290
Description 1A Synchronous Buck Regulator
Fabricant ANPEC 
Logo ANPEC 





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APW7290 fiche technique
APW7290
1.5MHz, 1A Synchronous Buck Regulator
Features
General Description
1A Output Current
Support 4 AA alkaline, NiCd or NiMH batteries
Wide 3.5V~7.2V Input Voltage
Fixed 1.5MHz Switching Frequency
Low Dropout Operating at 100% duty cycle
Low 25µA Quiescent Current
Integrate Synchronous Rectifier
0.6V Low Reference Voltage
<0.5µA Input Current during Shutdown
Current-Mode Operation with Internal
Compensation
- Stable with Ceramic Output Capacitors
- Fast Line Transient Response
Short-Circuit Protection
Over-Temperature Protection with Hysteresis
Available in TDFN2x2-8 Package
Lead Free and Green Devices Available
(RoHS Compliant)
Applications
E-Book
Toy
Portable Instrument
The APW7290 is a high efficiency monolithic synchro-
nous buck regulator. APW7290 operates with a constant
1.5MHz switching frequency and using the inductor cur-
rent as a controlled quantity in the current mode
architecture. The 3.5V to 7.2V input voltage range makes
the APW7290 ideally suited for single Li-Ion battery pow-
ered applications. 100% duty cycle provides low dropout
operation, extending battery life in portable electrical
devices. The internally fixed 1.5MHz operating frequency
allows the use of small surface mount inductors and
capacitors. The synchronous switches included inside
increase the efficiency and eliminate the need for an ex-
ternal Schottky diode.
The APW7290 is available in TDFN2x2-8 package.
Pin Configuration
GND 1
VIN 2
RUN 3
LBI 4
8 LBO
7 SW
6 VOUT
5 FB
TDFN2x2-8
(Top View)
Simplified Application Circuit
1 GND
Low Battery
Output
R3
VIN
C1
ON
OFF
2 VIN
LBO 8
3 RUN
SW 7
VOUT 6
R4 4 LBI
FB 5
R5 APW7290
L1
R1
R2
VOUT
C2
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.2 - Jun., 2013
1
www.anpec.com.tw

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