APW7085 Datasheet, PDF (1/24 Pages) Anpec Electronics Coropration – 2A, 26V, 380kHz, Asynchronous Step-Down Converter

APW7085
2A, 26V, 380kHz, Asynchronous Step-Down Converter
Features
General Description
• Wide Input Voltage from 4.5V to 26V
• Output Current up to 2A
• Adjustable Output Voltage from 0.8V to 90%V_IN
- 0.8V Reference Voltage
- ±2.5% System Accuracy
• 100mΩ Integrated 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
• SOP-8 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 2A Output Current
The APW7085 is a 2A, asynchronous, step-down con-
verter with integrated 100mΩ P-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% V_IN to provide excellent output voltage
regulation.
The APW7085 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 APW7085 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-8 package, pro-
vides a very compact system solution with minimal exter-
nal components.
100
90
V_OUT=5V
80
70
60
V_OUT=3.3V
50
40
30
20
10
0
0.001
0.01
0.1
1
10
Output Current, I_OUT (A)
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 - Sep., 2010
www.anpec.com.tw