APW7073_12 Datasheet, PDF (1/20 Pages) Anpec Electronics Coropration – Synchronous Buck PWM Controller

APW7073
Synchronous Buck PWM Controller
Features
• Single 12V Power Supply Required
• 0.6V Reference with 1% Accuracy
• Shutdown and Soft-Start Function
• Programmable Frequency Range from 50 kHz to
1000kHz
• Voltage Mode PWM Control Design
• Up to 100% Duty Cycle
• Under-Voltage Protection (UVP)
• Over-Current Protection (OCP)
• SOP-14 Package
• Lead Free and Green Devices Available
(RoHS Compliant)
Typical Application Circuit
12V
R_FS
APW7073
R_OCSET
V_IN
L
V_OUT
C_SS
General Description
The APW7073 is a voltage mode, synchronous PWM
controller which drives dual N-channel MOSFETs. The
device integrates all of the control, monitoring and
protecting functions into a single package, provides
one controlled power output with under-voltage and
over-current protections.
The APW7073 provides excellent regulation for output
load variation. The internal 0.6V temperature-compensated
reference voltage is designed to meet the requirement
of low output voltage applications. The device includes a
200kHz free-running triangle-wave oscillator that is
adjustable from 50kHz to 1000kHz.
The APW7073 has been equipped with excellent protec-
tion functions: POR, OCP, and UVP. The Power-On-Re-
set (POR) circuit can monitor the VCC, EN, and OCSET
voltage to make sure the supply voltage exceeds their
threshold voltage while the controller is running. The
Over-Current Protection (OCP) monitors the output cur-
rent by using the voltage drop across the upper MOSFET’s
R . When the output current reaches the trip point, the
DS(ON)
controller will run the soft-start function until the fault
events are removed. The Under-Voltage Protection (UVP)
monitors the voltage at FB pin (V ) for short-circuit
FB
protection. When the V is less than 50% of V , the
FB
REF
controller will shutdown the IC directly.
Applications
• Graphic Cards
Ordering and Marking Information
APW7073
Assembly Material
Handling Code
Temperature Range
Package Code
Package Code
K : SOP - 14
Operating Ambient Temperature Range
E : -20 to 70°C
Handling Code
TR : Tape & Reel
Assembly Material
L : Lead Free Device G : Halogen and Lead Free Device
APW7073 K :
APW7073
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).
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.7 - Nov., 2012
www.anpec.com.tw