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Anpec Electronics Coropration

APW7065 Datasheet Preview

APW7065 Datasheet

Synchronous Buck PWM Controller

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APW7065
Synchronous Buck PWM Controller
Features
Single 12V Power Supply Required
Fast Transient Response
- 0~90% Duty Ratio
0.8V Reference with 1% Accuracy
Shutdown Function by Controlling
COMP Pin Voltage
Internal Soft-Start (3.4ms) Function
Voltage Mode PWM Control Design
Under-Voltage Protection
Over-Current Protection
- Sense Low Side MOSFET’s RDS(ON)
300kHz Fixed Switching Frequency
SOP-8 Package
Lead Free and Green Devices Available
(RoHS Compliant)
Simplified Application Circuit
12V
VIN
APW7065
L VOUT
Pin Configuration
General Description
The APW7065 uses fixed 300kHz switching frequency,
voltage mode, and synchronous PWM controller which
drives dual N-channel MOSFETs. The device integrates
the control, monitoring and protection functions into a
single package, provides one controlled power output
with under-voltage and over-current protections.
The APW7065 provides excellent regulation for output
load variation. The internal 0.8V temperature-
compensated reference voltage is designed to meet
the requirement of low output voltage applications. An
built-in digital soft-start with fixed soft-start interval
prevents the output voltage from overshoot as well as
limiting the input current.
The APW7065 with excellent protection functions:
POR, OCP and UVP. The Power-On-Reset (POR)
circuit can monitor VCC supply voltage exceeds its
threshold voltage while the controller is running, and a
built-in digital soft-start provides output with controlled
voltage rise. The Over-Current Protection (OCP)
monitors the output current by using the voltage drop
across the lower MOSFET’s R , comparing with
DS(ON)
internal V (0.29V), when the output current reaches
OCP
the trip point, the controller will run the soft-start
function until the fault events are removed. The Under-
Voltage Protection (UVP) monitors the voltage of FB
pin for short-circuit protection, when the VFB is less
than 50% of VREF (0.4V), the controller will shutdown
the IC directly.
BOOT 1
UGATE 2
GND 3
LGATE 4
8 PHASE
7 COMP
6 FB
5 VCC
Applications
Graphics Card
Mother Board
SOP-8
(APW7065)
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.
Rev. A.5 - Mar., 2008
1
www.anpec.com.tw




Anpec Electronics Coropration

APW7065 Datasheet Preview

APW7065 Datasheet

Synchronous Buck PWM Controller

No Preview Available !

APW7065
Ordering and Marking Information
APW7065
Assembly Material
Handling Code
Temp. Range
Package Code
Package Code
K : SOP-8
Operating Ambient Temp. Range
E : -20 to 70 °C
Handling Code
TR : Tape & Reel
Assembly Material
L : Lead Free Device
G : Halogen and Lead Free Device
APW7065
K : APW7065
XXXXX
XXXXX - Date Code
Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which
are fully compliant with RoHS. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J-STD-020C for
MSL classification at lead-free peak reflow temperature. ANPEC defines “Green” to mean lead-free (RoHS compliant) and halogen
free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by
weight).
Block Diagram
VCC
GND
Power-
On-
Reset
Digital
Soft Start
O.C.P
Comparator
Error Amp
50%VREF
2
Sense Low Side
0.29V
U.V.P
Comparator
PWM
Comparator Gate
Control
VREF
Oscillator
Sawtooth
Wave FOSC
300kHz
FB COMP
Copyright © ANPEC Electronics Corp.
Rev. A.5 - Mar., 2008
2
BOOT
UGATE
PHASE
LGATE
www.anpec.com.tw


Part Number APW7065
Description Synchronous Buck PWM Controller
Maker Anpec Electronics Coropration
Total Page 19 Pages
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