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Anpec Electronics Coropration

APW7065A Datasheet Preview

APW7065A Datasheet

Synchronous Buck PWM Controller

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APW7065A
Synchronous Buck PWM Controller
Features
General Description
Single 12V Power Supply Required
Fast Transient Response
- 0~90% Duty Ratio
0.8V Reference with 1% Accuracy
Shutdown Function by Controlling COMP
The APW7065A uses fixed 300kHz switching frequency,
voltage mode, 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.
Pin Voltage
Internal Soft-Start (1.7ms) Function
Voltage Mode PWM Control Design
Under-Voltage Protection
Over-Current Protection
- Sense Low Side MOSFET’s R
DS(ON)
300KHz Fixed Switching Frequency
SOP-8P Package
Lead Free and Green Devices Available
(RoHS Compliant)
Simplified Application Circuit
12V
VIN
The APW7065A provides excellent regulation for out-
put load variation. The internal 0.8V temperature-com-
pensated reference voltage is designed to meet the re-
quirement 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 in-
put current.
The APW7065A with excellent protection functions:
POR, OCP and UVP. The Power-On-Reset (POR) cir-
cuit can monitor VCC supply voltage exceeds its thresh-
old 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 RDS(ON), comparing with internal VOCP (0.29V),
when the output current reaches the trip point, the IC
APW7065A
shuts off the converter and initiates a new soft-start
L VOUT process. After two over-current events are counted,
the device turns off both high-side and low-side
MOSFETs and the converter's output is latched to be
floating. It requires a POR of VCC to restart. The Under-
Voltage Protection (UVP) monitors the voltage of FB pin
Pin Configuration
BOOT 1
8 PHASE
for short-circuit protection, when the VFB is less than
50% of VREF (0.4V), the controller will shutdown the IC
directly.
UGATE 2
7 COMP
GND 3
LGATE 4
6 FB
5 VCC
Applications
SOP-8P
(APW7065A)
Graphics Card
Mother Board
Thermal Pad
(Connect to GND Plane for better heat dissipation)
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.4 - Mar., 2008
1
www.anpec.com.tw




Anpec Electronics Coropration

APW7065A Datasheet Preview

APW7065A Datasheet

Synchronous Buck PWM Controller

No Preview Available !

APW7065A
Ordering and Marking Information
APW7065A
Assembly Material
Handling Code
Temp. Range
Package Code
Package Code
KA : SOP-8P
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
APW7065A KA :
APW7065
XXXXX A
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).
Absolute Maximum Ratings (Note 1)
Symbol
Parameter
Rating
Unit
VCC
VBOOT
VUGATE
VLGATE
VPHASE
VCOMP, VFB
TJ
TSTG
TSDR
VCC to GND
BOOT to PHASE
UGATE to PHASE
<400ns pulse width
>400ns pulse width
LGATE to GND
PHASE to GND
COMP, FB to GND
<400ns pulse width
>400ns pulse width
<200ns pulse width
>200ns pulse width
Junction Temperature Range
Storage Temperature
Maximum Lead Soldering Temperature, 10 Seconds
-0.3 ~ 16
-0.3 ~ 16
-5 ~ VBOOT+5
-0.3 ~ VBOOT+0.3
-5 ~ VCC+5
-0.3 ~ VCC+0.3
-10 ~ 30
-0.3 ~ 16
-0.3 ~ 7
-20 ~ 150
-65 ~ 150
260
V
V
V
V
V
V
oC
oC
oC
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Thermal Characteristics
Symbol
θJA
θJC
Parameter
Junction-to-Ambient Thermal Resistance in Free Air
SOP-8P
Junction-to-Case Thermal Resistance
SOP-8P
Value
55
20
Unit
oC/W
oC/W
Copyright © ANPEC Electronics Corp.
Rev. A.4 - Mar., 2008
2
www.anpec.com.tw


Part Number APW7065A
Description Synchronous Buck PWM Controller
Maker Anpec Electronics Coropration
Total Page 20 Pages
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