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Anpec Electronics Coropration

APW7061 Datasheet Preview

APW7061 Datasheet

Synchronous Buck PWM Controller

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APW7061
Features
Fast Transient Response
- 0~85% Duty Ratio
www.DataSheet4U.comExcellent Output Voltage Regulation
- 0.8V Internal Reference
- ±1% Over Line Voltage and Temperature
Internal Soft-Start
- Typical 2mS
Over Current Protection
- Sense Low-side MOSFET’s RDS(ON)
Under Voltage Lockout
Small Converter Size
- 250kHz Free-running Oscillator
8-lead SOIC Package
Lead Free Available (RoHS Compliant)
Applications
Graphic Cards
Memory Power Supplies
DSL or Cable MODEMs
Set Top Boxes
Low-Voltage Distributed Power Supplies
Synchronous Buck PWM Controller
General Description
The APW7061 is a voltage mode, synchronous PWM
cont roller which drives dual N-c hannel MOSFETs . It
integrates t he c ont rols, monitoring and protec tion
funct ions into a single package, which provides one
c ontrolled power output s wit h under-voltage and
over-current protections.
APW7061 provides excellent regulation for output load
variation. An internal 0.8V temperature-compensated
reference voltage is designed to meet the various low
output voltage applications.
A power-on-reset (POR) circuit limits the VCC minimum
opearting s upply voltage to ass ure the c ontroller
working well. Over current protec tion is achieved by
monit oring t he volt age drop ac ros s the low s ide
MOSFET, eliminating the need for a current sensing
resistor and short circuit condition is detected through
the FB pin. The over-current protection triggers the
soft -start function until the fault events be removed,
but Under-voltage protection will shutdown IC directly.
Pull the COMP pin below 0.4V will shutdown t he
controller, and both gate drive signals will be low.
Pinouts
VCC
FB
COMP
GND
1
2
3
4
8 LGATE
7 BOOT
6 UGATE
5 PHASE
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.
C opyright © ANPEC Electronics C orp.
Rev. A.7 - Nov., 2005
1
www.anpec.com.tw




Anpec Electronics Coropration

APW7061 Datasheet Preview

APW7061 Datasheet

Synchronous Buck PWM Controller

No Preview Available !

APW7061
Ordering and Marking Information
APW7061
www.DataSheet4U.com
LeadFreeCode
HandlingCode
Temp.Range
PackageCode
APW7061 K :
APW7061
XXXXX
PackageCode
K : SOP-8
OperatingJunctionTemp.Range
C : 0 to 70 °C
HandlingCode
TU : Tube TR : Tape & Reel
LeadFreeCode
L : Lead Free Device Blank : Original Device
XXXXX - Date Code
No te : ANPEC lea d-fre e p ro ducts co ntain mo ld ing comp oun ds /di e attach m ate ri als and 100 % matte ti n p la te
te rmin atio n fi nish ; wh ich are full ycompl iant with Ro HS and compa tibl e wi th both SnPb an d le ad-free sold ieri ng
op era tio ns. AN PEC le ad-free produ cts me et or exceed th e l ead -free req uireme nts of IPC /JEDEC J STD -02 0C
fo r MSL classi ficati on at lea d-fre e p eak re flo w temp era ture.
Block Diagram
VCC
GND
Power-On
Reset
Soft Start
50%VREF
2
Gate
Control
VCC
IOCSET
250uA
U.V.P
Comparator
O.C.P
Comparator
VCC
PWM
Comparator
BOOT
UGATE
PHASE
LGATE
Error
Amp
V REF
Triangle
Wave
FB COMP
C opyright © ANPEC Electronics C orp.
Rev. A.7 - Nov., 2005
2
www.anpec.com.tw


Part Number APW7061
Description Synchronous Buck PWM Controller
Maker Anpec Electronics Coropration
Total Page 17 Pages
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