AOZ3015PI Datasheet, PDF (1/13 Pages) Alpha & Omega Semiconductors – EZBuck™ 3 A Synchronous Buck Regulator

AOZ3015PI
EZBuck™ 3 A Synchronous Buck Regulator
General Description
The AOZ3015PI is a high efficiency, easy to use, 3 A
synchronous buck regulator. The AOZ3015PI works from
4.5 V to 18 V input voltage range, and provides up to 3 A
of continuous output current with an output voltage
adjustable down to 0.8 V.
The AOZ3015PI comes in an exposed pad SO-8
package and is rated over a -40 °C to +85 °C operating
ambient temperature range.
Features
 4.5 V to 18 V operating input voltage range
 Synchronous Buck: 85 mΩ internal high-side switch
and 50 mΩ internal low-side switch (at 12 V)
 PEM (pulse energy mode) enables >85% efficiency
with I_OUT = 10 mA (V_IN = 12 V, V_OUT = 5 V)
 350 µA supply current under typical application
 Up to 95 % efficiency
 Internal soft-start
 Output voltage adjustable to 0.8 V
 3 A continuous output current
 500 kHz PWM operation
 Cycle-by-cycle current limit
 Pre-bias start-up
 Short-circuit protection
 Thermal shutdown
 Exposed pad SO-8 package
Applications
 Point of load DC/DC converters
 LCD TV
 Set top boxes
 DVD and Blu-ray players/recorders
 Cable modems
Typical Application
VIN
C1
10µF
C_CC
VIN VCC
VOUT
EN
AOZ3015PI LX
L1
COMP
R_C
AGND
C_C
FB
PGND
VOUT
R1
C2, C3
22µF
R2
Figure 1. 3 A Synchronous Buck Regulator, Fs = 500 kHz
100
90
80
70
60
50
0.01
Rev. 2.0 July 2013
www.aosmd.com
Efficiency (V_IN = 12V) vs. Load Current
5V OUTPUT
3.3V OUTPUT
2.5V OUTPUT
1.8V OUTPUT
0.1
1
10
Load Current (A)
Page 1 of 13