AT1526 Datasheet, PDF (2/2 Pages) Global Mixed-mode Technology Inc – 1MHz, All-Ceramic, 2A PWM Buck DC/DC Converter

Global Mixed-mode Technology
AT1527
1MHz, All-Ceramic, 3A PWM Buck DC/DC Converter
Features
„ Ceramic Input and Output Capacitors
„ Efficiency Up to 94%
„ Operate from 2.5V to 6V supply
„ Adjustable Output from 0.8V to V_IN
„ Internal Soft-Start
„ Short-Circuit and Thermal-Overload Protection
„ Input Over Voltage Protection
„ RoHS Compliant
Applications
„ ASIC/DSP/µP/FPGA Core and I/O Voltages
„ Set-Top Boxes
„ Cellular Base Stations
„ Networking and Telecommunications
General Description
The AT1527 high-efficiency, DC/DC buck converter
delivers up to 3A of output current. The device operates
from an input voltage of 2.5V to 6V and provides an
output voltage from 0.8V to V_IN, making the AT1527
ideal for on-board post-regulation applications.
The AT1527 operate at a fixed frequency of 1MHz with
an efficiency of up to 94%. The high operating fre-
quency minimizes the size of external components.
Internal soft-start control circuitry reduces inrush cur-
rent. Short-circuit and thermal-overload protections
improve design reliability.
The AT1527 are available in a space-saving 8-pin SO
package.
Ordering Information
ORDER
NUMBER
AT1527F11U
Note: F1:SOP-8 (FD)
1: Bonding Code
U: Tape & Reel
MARKING
A1527
TEMP.
RANGE
-40°C to +85°C
PACKAGE
(Green)
SOP-8 (FD)
Pin Configuration
VCC 1
AT1527
8 VIN
REF 2
GND 3
Thermal
Pad
7 LX
6 PGND
FB 4
5 EN
SOP-8 (FD)
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
Typical Application Circuit
VIN
5V
10µF
A1527
8
VIN
7
LX
10Ω
1
0.1µF
5
ON ^OFF
VCC
EN
PGND
6
4
FB
2
REF
GND 0.1µF
3
R1
V_OUT = 0.8V ×
( 1+
R2
)
2.2µH
C_FB* (option)
R1
50k
R2
16k
V_OUT
3.3V
22µF
Ver:1.1
Dec 05, 2012
TEL: [phone]
http://www.gmt.com.tw
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