APW7178A Datasheet, PDF (1/16 Pages) Anpec Electronics Coropration – 1.5MHz, 1A Synchronous Buck Regulator

APW7178A
1.5MHz, 1A Synchronous Buck Regulator
Features
• 1A Output Current
• Wide 2.7V~6.0V Input Voltage
• Fixed 1.5MHz Switching Frequency
• Low Dropout Operating at 100% Duty Cycle
• 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
Pin Configuration
General Description
APW7178A is a 1.5MHz high efficiency monolithic syn-
chronous buck regulator. Design with current mode
scheme, the APW7178A is stable with ceramic output
capacitor. Input voltage from 2.7V to 6.0V makes the
APW7178A 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 using of small surface mount inductors and
capacitors. The synchronous switches included inside
increase the efficiency and eliminate the need of an ex-
ternal Schottky diode.
The APW7178A is available in TDFN2x2-6 packages.
Simplified Application Circuit
VIN I_IN
C1
4.7µF
(MLCC)
APW7178A
VIN SW
NC
RUN FB
GND
L1
2.2µH
V_OUT
C2
R1
C3
10µF
(MLCC)
R2
R1 ≤ 1MΩ is recommended
R2 ≤ 200KΩ is recommended
Place C1 closed VIN/GND. Without via hole is recommended.
APW7178A
NC 1
RUN 2
VIN 3
6 FB
5 GND
4 SW
TDFN2x2-6
(Top View)
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.1 - Sep., 2012
www.anpec.com.tw