APW8723 Datasheet, PDF (1/23 Pages) Anpec Electronics Coropration – 5V to 12V Single Buck Voltage Mode PWM Controller

APW8723
5V to 12V Single Buck Voltage Mode PWM Controller
Features
General Description
• Wide 5V to 12V Supply Voltage
The APW8723 is a voltage mode, fixed 300kHz switching
• Power-On-Reset Monitoring on VCC
frequency, synchronous buck converter. The APW8723
• Excellent Output Voltage Regulations
allows wide input voltage that is either a single 5V~12V
- 0.8V Internal Reference
or two supply voltage(s) for various applications. The
- ±1% Over Temperature Range
power-on-reset (POR) circuit monitors the VCC supply
• Integrated Soft-Start
voltage to prevent wrong logic controls. A built-in soft-start
•
circuit prevents the output voltages from overshoot as
Voltage Mode PWM Operation with External
well as limits the input current. An internal 0.8V tempera-
Compensation
ture-compensated reference voltage with high accuracy
• Up to 90% Duty Ratio for Fast Transient Response _{is designed to meet the requirement of low output volt-}
• Constant Switching Frequency
age applications. The APW8723 provides excellent out-
- 300kHz ±10%
put voltage regulations against load current variation.
• Integrated Bootstrap Forward P-CH MOSFET
APW8723 is built in reference voltage offset function for
• Drive Dual Low Cost N-MOSFETs with Adaptive applications that require adjusting supply voltage.
Dead Time Control
• 50% Under-Voltage Protection
• 125% Over-Voltage Protection
• Adjustable Over-Current Protection Threshold
- Using the R of Low-Side MOSFET
DS(ON)
• Shutdown Control by COMP
• Power Good Monitoring
• TDFN3x3-10 Package
The controller’s over-current protection monitors the out-
put current by using the voltage drop across the R_DS(ON) of
low-side MOSFET, eliminating the need for a current sens-
ing resistor that features high efficiency and low cost. In
addition, the APW8723 also integrates excellent protec-
tion functions, The over-voltage protection (OVP) , under-
voltage protection (UVP) and over-temperature protec-
tion (OTP). OVP circuit which monitors the FB voltage to
prevent the PWM output from over voltage, and UVP cir-
• Lead Free and Green Devices Available
cuit which monitors the FB voltage to prevent the PWM
(RoHS Compliant)
output from under voltage or short circuit. OTP circuit which
monitors the junction temperature to prevent over-heat-
ing conditions.
The APW8723 is available in TDFN3x3-10 package.
Applications
• Graphic Cards
• DSL, Switch HUB
• Wireless Lan
• Notebook Computer
• Mother Board
• LCD Monitor/TV
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 - Apr., 2013
www.anpec.com.tw