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APW7089 Datasheet Preview

APW7089 Datasheet

Asynchronous Step-Down Converter

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APW7089
4A, 26V, 380kHz, Asynchronous Step-Down Converter
Features
General Description
Wide Input Voltage from 4.5V to 26V
Output Current up to 4A
Adjustable Output Voltage from 0.8V to 90% V
IN
- 0.8V Reference Voltage
- ±2.5% System Accuracy
80mIntegrated P-Channel Power MOSFET
High Efficiency up to 91%
- Pulse-Skipping Mode (PSM) / PWM Mode Op-
eration
Current-Mode Operation
- Stable with Ceramic Output Capacitors
- Fast Transient Response
Power-On-Reset Monitoring
Fixed 380kHz Switching Frequency in PWM Mode
Built-in Digital Soft-Start
Output Current-Limit Protection with Frequency
Foldback
70% Under-Voltage Protection
Over-Temperature Protection
<5µA Quiescent Current During Shutdown
Thermal-Enhanced SOP-8P Package
Lead Free and Green Devices Available
(RoHS Compliant)
Applications
LCD Monitor / TV
Set-Top Box
Portable DVD
Wireless LAN
ADSL, Switch HUB
Notebook Computer
Step-Down Converters Requiring High Efficiency
and 4A Output Current
The APW7089 is a 4A, asynchronous, step-down con-
verter with integrated 80mP-channel MOSFET. The
device, with current-mode control scheme, can convert
4.5~26V input voltage to the output voltage adjustable
from 0.8 to 90% VIN to provide excellent output voltage
regulation.
The APW7089 regulates the output voltage in automatic
PSM/PWM mode operation, depending on the output
current, for high efficiency operation over light to full load
current. The APW7089 is also equipped with power-on-
reset, soft-start, and whole protections (under-voltage,
over-temperature, and current-limit) into a single package.
In shutdown mode, the supply current drops below 5µA.
This device, available in a 8-pin SOP-8P package, pro-
vides a very compact system solution with minimal exter-
nal components and good thermal conductance.
100
90
80 VOUT =5V
70 VOUT =3.3V
60
50
40
30
20
10
0.001
0.01 0.1
1
Output Current, IOUT (A)
10
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.1 - Jan., 2012
1
www.anpec.com.tw




ANPEC

APW7089 Datasheet Preview

APW7089 Datasheet

Asynchronous Step-Down Converter

No Preview Available !

APW7089
Ordering and Marking Information
APW7089
APW7089 KA :
Assembly Material
Handling Code
Temperature Range
Package Code
APW7089
XXXXX
Package Code
KA : SOP-8P
Operating Ambient Temperature Range
I : -40 to 85 oC
Handling Code
TR : Tape & Reel
Assembly Material
G : Halogen and Lead Free Device
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-020D 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).
Pin Configuration
Simplified Application Circuit
VIN 1
8 GND
EN 2 9 7 FB
UGND 3 LX 6 COMP
VCC 4
5 LX
SOP-8P
(Top View)
The Pin 5 must be connected to the Exposed Pad
C3
VIN
C6
Absolute Maximum Ratings (Note 1)
VIN
VCC UGND
LX
U1
APW7089
EN
COMP FB
C1
10µF
C2
L1
4A
D1
R1
1%
R4 GND
C5
R2
1%
C7
(Optional)
VIN
+12
VOUT
+3.3V
C4
22µF
Symbol
Parameter
Rating
Unit
VIN VIN Supply Voltage (VIN to GND)
-0.3 ~ 30
V
VLX LX to GND Voltage
> 100ns
< 100ns
-2 ~ VIN+0.3
-5 ~ VIN+6
V
VCC VCC Supply Voltage (VCC to GND)
VUGND_GND UGND to GND Voltage
VIN > 6.2V
VIN 6.2V
-0.3 ~ 6.5
< VIN+0.3
-0.3 ~ VIN+0.3
V
V
VVIN_UGND VIN to UGND Voltage
-0.3 ~ 7V
V
EN to GND Voltage
-0.3 ~ 20
V
FB, COMP to GND Voltage
-0.3 ~ VCC +0.3
V
Maximum Junction Temperature
150 oC
TSTG
Storage Temperature
-65 ~ 150
oC
TSDR Maximum Lead Soldering Temperature, 10 Seconds
260 oC
Note1: Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are
stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recom-
mended operating conditions" is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device
reliability.
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Jan., 2012
2
www.anpec.com.tw


Part Number APW7089
Description Asynchronous Step-Down Converter
Maker ANPEC
Total Page 24 Pages
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