APW8816 Datasheet, PDF (1/26 Pages) Anpec Electronics Coropration – Single Buck PWM Controller With Linear Regulator

APW8816
Single Buck PWM Controller With Linear Regulator
Features
General Description
PWM Controller
• Adjustable Output Voltage from +0.75V to +3.3V
- 0.75V Reference Voltage
- ±1% Accuracy Over-Temperature
• Operates from An Input Battery Voltage Range of
+3V to +28V
• Power-On-Reset Monitoring on VCC Pin and PVCC
Pin to Avoid Wrong Sequence
• Excellent Line and Load Transient Responses
• PFM Mode for Increased Light Load Efficiency
• Programmable PWM Frequency from 100kHz to
500kHz
• Integrated MOSFET Drivers
• Integrated Bootstrap Forward P-CH MOSFET
• Integrated Soft-Start
• Selectable Forced PWM or Automatic PFM/PWM
Mode
• Power Good Monitoring
• 70% Under-Voltage Protection
• 125% Over-Voltage Protection
• Adjustable Current-Limit Protection
- Using Sense Low-Side MOSFET’s R_DS(ON)
• Over-Temperature Protection
LDO Controller
• 0.75V Reference Voltage with 1.5% Accuracy Over
Temperature
• Independent Enable and Power OK Function
• 50% Under-Voltage Protection
• Integrated Soft-Start Function
• TQFN-16 3x3 package
• Lead Free and Green Device Available (RoHS
Compliant)
The APW8816 is a single-phase, constant on-time,
synchronous PWM controller with linear regulator, which
drives N-channel MOSFETs. The APW8816 steps down
high voltage to generate low-voltage chipset or RAM
supplies in notebook computers.
The APW8816 provides excellent transient response and
accurate DC voltage output in either PFM or PWM Mode.
In Pulse Frequency Mode (PFM), the APW8816 provides
very high efficiency over light to heavy loads with loading-
modulated switching frequencies. In PWM Mode, the
converter works nearly at constant frequency for low-noise
requirements.
The APW8816 is equipped with accurate positive current
limit, output under-voltage, and output over-voltage
protections, perfect for various applications. The Power-
On-Reset function monitors the voltage on VCC and PVCC
to prevent wrong operation during power-on. The
APW8816 has a 1.5ms digital soft start and built-in an
integrated output discharge device for soft stop. An internal
soft-start ramps up the output voltage with programmable
slew rate to reduce the start-up current. A soft-stop function
actively discharges the output capacitors.
The integrated linear regulator could drive an external N-
Channel MOSFET and provides an adjustable output by
using an external resistive divider. It is easy to be used
because there is independent enable function and power
OK indicator at linear regulator part. Moreover, linear
regulator has soft start, under-voltage and over-
temperature protection to become the great second
output voltage of the APW8816.
The APW8816 is available in 16pin TQFN packages
respectively.
Applications
• Notebook
• Table PC
• Hand-Held Portable
• AIO PC
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 - Apr., 2013
www.anpec.com.tw