APW8724 Datasheet, PDF (1/22 Pages) Anpec Electronics Coropration – Common single PWM Controller with Multiform supply Voltage

APW8724
Common single PWM Controller with Multiform supply Voltage
Features
General Description
• Adjustable Output Voltage from +0.6V to +5.0V
The APW8724 is a single-phase, constant on-time, syn-
- 0.6V Reference Voltage
chronous PW M controller, which drives N-channel
- +0.6% Accuracy
MOSFETs. The APW8724 steps down high voltage to
• Operates from An Input Battery Voltage Range of ^{generate low-voltage chipset, RAM supplies in notebook}
+3V to +25V
computers or mother board applications.
• Multiform Purpose Input Voltage Collocation
The APW8724 provides excellent transient response and
- V_CC=5V / V_IN=8~19V For NB application
- V =5~12V / V =5~12V For table PC application
accurate DC voltage output in either PFM or PWM Mode.
In Pulse Frequency Mode (PFM), the APW8724 provides
•
CC
IN
Remote Feedback Sense for Excellent Output
very high efficiency over light to heavy loads with loading-
Voltage Regulation
• Power-On-Reset Monitoring on VCC pin
modulated switching frequencies. In PWM Mode, the con-
verter works nearly at constant frequency for low-noise
requirements. The unique ultrasonic mode maintains the
• Excellent line and load transient responses
switching frequency above 37kHz, which eliminates noise
• Ultrasonic Operation Eliminated Audio Noise
in audio application. APW8724 is built in remote sense
• PFM mode for increased light load efficiency
function for applications that require remote sense.
• 300kHz Constant PWM Switching Frequency
The APW8724 is equipped with accurate positive current
• Integrated MOSFET Drivers
• Integrated Bootstrap Forward P-CH MOSFET
• Adjustable Integrated Soft-Start
• Power Good Monitoring
• 70% Under-Voltage Protection
• 125% Over-Voltage Protection
• Adjustable Current-limit protection
- Using Sense Low-Side MOSFET’s RDS(ON)
• Over-Temperature Protection
limit, output under-voltage, and output over-voltage
protections, perfect for multiform applications. The Power-
On-Reset function monitors the voltage on VCC to pre-
vent wrong operation during power-on. The APW8724 has
an internal 4ms digital soft start that ramps up the output
voltage with programmable slew rate to reduce the start-
up current. The enable function can let user easy to apply
APW8724.
The APW8724 is available in 10pin TDFN 3x3 package
respectively.
• TDFN3x3-10 Package
• Lead Free and Green Devices Available
Simplified Application Circuit
(RoHS Compliant)
RPOK
5~12V
VIN
Applications
• Notebook
• Table PC
• Hand-Held Portable
• AIO PC
• Wide input DC/DC Regulators
POK VCC EN
UGATE
Q1
APW8724
L
PHASE
FBRTN
LGATE/
Q2
OCSET
VOUT
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 - Jan., 2013
www.anpec.com.tw