APW7165C Datasheet, PDF (1/20 Pages) Anpec Electronics Coropration – 5V to 12V Synchronous Buck Controller

APW7165C
5V to 12V Synchronous Buck Controller
Features
General Description
• Wide Operation Supply Voltage from 5V to 12V
• Power-On-Reset Monitoring on VCC
• Excellent Reference Voltage Regulations
- 0.6V Internal Reference
- ±1% Over Temperature Range
• Integrated Soft-Start
• Automatic PSM/PWM Modes
• Voltage Mode PWM Operation with 90% (Max.)
Duty Cycle
• Under-Voltage Protection
• Adjustable Over-Current Protection Threshold
- Sensing the R_DS(ON) of Low-Side MOSFET
• Over-Voltage Protection
• Under-Voltage Protection
• Simple SOP-8P Package
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• Graphic Cards
• DSL, Switch HUB
• Wireless Lan
• Notebook Computer
• Mother Board
• LCD Monitor/TV
Pin Configuration
The APW7165Cis a voltage mode, fixed 300kHz-switch-
ing frequency, and synchronous buck controller. The
APW7165C allows wide input voltage that is either a
single 5~12V or two supply voltage(s) for various
applications. A power-on-reset (POR) circuit monitors the
VCC supply voltage to prevent wrong logic controls. A built-
in digital soft-start circuit prevents the output voltages from
overshoot as well as limits the input current. An internal
0.6V temperature-compensated reference voltage with
high accuracy is designed to meet the requirement of
low output voltage applications. The APW7165C provides
excellent output voltage regulations against load current
variation.
The controller’s over-current protection monitors the out-
put current by using the voltage drops across the R
DS(ON)
of low-side MOSFET, eliminating the need for a current
sensing resistor that features high efficiency and low cost.
The APW7165C also integrates over-voltage protection
(OVP) and under-voltage protection circuit which moni-
tors the FB voltage to prevent the PWM output from over
and under voltage.
The APW7165C is available in a simple SOP-8P package.
Simplified Application Circuit
OFF
ON
V_VCC
APW7165C
5 _VCC BOOT ¹
7
UGATE ²
COMP
PHASE ⁸
LGATE ⁴
6 _{FB GND}
3
V_IN
V_OUT
BOOT 1
UGATE 2
GND 3
LGATE 4
9
GND
8 PHASE
7 COMP
6 FB
5 VCC
SOP-8P
(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.2 - Oct., 2012
www.anpec.com.tw