APW8824 Datasheet, PDF (1/19 Pages) Anpec Electronics Coropration – 1.5MHz, 1A Synchronous Buck Regulator

APW8824
1.5MHz, 1A Synchronous Buck Regulator
Features
• 1A Output Current
• Wide 2.7V~5.5V 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 Compen-
sation
- Stable with Ceramic Output Capacitors
- Fast Line Transient Response
• Over-Voltage Protection
• Under Voltage Protection
• Over-Temperature Protection with Hysteresis
• Available in a TSOT-23-6A Package
• Halogen and Lead Free Available
(RoHS Compliant)
General Description
The APW8824 is a high efficiency monolithic synchro-
nous buck regulator. APW8824 operates with a constant
1.5MHz switching frequency and using the inductor cur-
rent as a controlled quantity in the current mode
architecture. The 2.7V to 5.5V input voltage range makes
the APW8824 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 APW8824 is available in TSOT-23-6A package
Applications
• HD STB
• BT Mouse
• PND Instrument
• Portable Instrument
Simplified Application Circuit
V_IN
I_IN
2.7~ 5. 5V
C1
10 µF
(MLCC)
4 _VIN
LX ³
1 _EN
R3
APW8824
100k
5 _{PG GND} ^FB
6
2
L1
2.2 µH
R1
VOUT
C3
( option)
C2
10 µF
0.6 V~VIN
0~1A
(MLCC)
R2
R1 < 1.5MΩ is recommended
R2 < 200 KΩ is recommended
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 - May., 2013
www.anpec.com.tw