APW7178 Datasheet, PDF (1/16 Pages) Anpec Electronics Coropration – 1.5MHz, 1A Synchronous Buck Regulator

APW7178
1.5MHz, 1A Synchronous Buck Regulator
Features
General Description
• 1A Output Current
• Wide 2.7V~6.0V Input Voltage
• Fixed 1.5MHz Switching Frequency
• Low Dropout Operating at 100% Duty Cycle
• 25µA Quiescent Current
• Synchronous Rectifier
• 0.6V Reference Voltage
• <0.5µA Input Current During Shutdown
• Short-Circuit Protection
• Over-Temperature Protection
• Available in TDFN2x2-6 Packages
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• HD STB
• BT Mouse
• PND Instrument
• Portable Instrument
APW7178 is a 1.5MHz high efficiency monolithic synchro-
nous buck regulator. Design with current mode scheme,
the APW7178 is stable with ceramic output capacitor. In-
put voltage from 2.7V to 6.0V makes the APW7178 ideally
suited for single Li-Ion battery powered applications. 100%
duty cycle provides low dropout operation, extending bat-
tery life in portable electrical devices. The internally fixed
1.5MHz operating frequency allows the using of small
surface mount inductors and capacitors. The synchro-
nous switches included inside increase the efficiency
and eliminate the need of an external Schottky diode.
The APW7178 is available in TDFN2x2-6 packages.
Simplified Application Circuit
V_{IN IIN}
C1
4.7µF
(MLCC)
APW7178
VIN SW
PS
RUN FB
GND
L1
2.2µH
V_OUT
C2
R1
C3
10µF
(MLCC)
R2
Pin Configuration
R1 ≤ 1MΩ is recommended
R2 ≤ 200KΩ is recommended
APW7178
PS 1
RUN 2
VIN 3
6 FB/VOUT
5 GND
4 SW
TDFN2x2-6
(Top View)
V_IN
I_IN
C1
4.7µF
(MLCC)
APW7178-10/12/18/33 L1
2.2µH
VIN SW
PS
RUN VOUT
GND
V_OUT
C2
10µF
(MLCC)
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.
1
Rev. A.2 - Jan., 2011
www.anpec.com.tw