Global Mixed-mode Technology
AT1530
General Description
The AT1530 high-efficiency, DC/DC buck converter
delivers up to 3.2A of output current. The device oper-
ates from an input voltage of 2.5V to 6V and provides
an output voltage from 0.8V to V
IN
, making the AT1530
ideal for on-board post-regulation applications.
The AT1530 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. Output under-voltage lockout, short-circuit and
over-temperature protections improve design reliabil-
ity.
The AT1530 are available in a space-saving SOP-8
and TDFN3X3-8 package.
1MHz, All-Ceramic, 3.2A 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
Ordering Information
ORDER
NUMBER
AT1530F11U
AT1530RD1U
Note: F1: SOP-8 (FD)
1: Bonding Code
U: Tape & Reel
MARKING
A1530
A1530
RD: TDFN3X3-8
TEMP.
RANGE
-40°C to +85°C
-40°C to +85°C
PACKAGE
(Green)
SOP-8 (FD)
TDFN3X3-8
Pin Configuration
Typical Application Circuit
AT1530
AT1530
VCC
REF
GND
FB
1
2
3
4
8
7
6
5
VIN
VCC
Thermal
Pad
LX
PGND
EN
REF
GND
FB
1
2
3
4
Thermal
Pad
8
7
6
5
VIN
LX
PGND
EN
10µF
AT1530
V
IN
5V
10Ω
8
VIN
LX
7
2.2µH
C
FB
* (option)
V
OUT
3.3V
1
0.1µF
5
ON OFF
VCC
EN
PGND
6
FB
REF
GND
3
4
2
0.1µF
R1
50k
22µF
R2
16k
SOP-8 (FD)
TDFN3X3-8
V
OUT
= 0.8V
×
(1+
R1
)
R2
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
Ver: 1.1
Dec 05, 2012
TEL: 886-3-5788833
http://www.gmt.com.tw
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