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Alpha & Omega Semiconductors

AOZ1268QI-01 Datasheet Preview

AOZ1268QI-01 Datasheet

28V/10A Synchronous EZBuck Regulator

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AOZ1268QI-01
28V/10A Synchronous EZBuckTM Regulator
General Description
The AOZ1268-01 is a high-efficiency, easy-to-use DC/DC
synchronous buck regulator that operates up to 28V.
The device is capable of supplying 10A of continuous
output current with an output voltage adjustable down to
0.8V (±1.0%).
The AOZ1268-01 integrates an internal linear regulator
to generate 5.3V VCC from input. If input voltage is lower
than 5.3V, the linear regulator operates at low drop-
output mode, which allows the VCC voltage is equal to
input voltage minus the drop-output voltage of the
internal linear regulator.
A proprietary constant on-time PWM control with input
feed-forward results in ultra-fast transient response while
maintaining relatively constant switching frequency over
the entire input voltage range. The switching frequency
can be externally programmed up to 1MHz.
The device features multiple protection functions such as
VCC under-voltage lockout, cycle-by-cycle current limit,
output over-voltage protection, short-circuit protection, as
well as thermal shutdown.
The AOZ1268-01 is available in a 4mm x 4mm QFN-23L
package and is rated over a -40°C to +85°C ambient
temperature range.
Features
Wide input voltage range
6.5V to 28V
10A continuous output current
Output voltage adjustable down to 0.8V (±1.0%)
Low RDS(ON) internal NFETs
28mhigh-side
8mlow-side
Constant On-Time with input feed-forward
Programmable frequency up to 1MHz
Selectable PFM light load operation
Ceramic capacitor stable
Adjustable soft start
Power Good output
Integrated bootstrap diode
Cycle-by-cycle current limit
Short-circuit protection
Thermal shutdown
Thermally enhanced 4mm x 4mm QFN-23L package
Applications
Portable computers
Compact desktop PCs
Servers
Graphics cards
Set-top boxes
LCD TVs
Cable modems
Point-of-load DC/DC converters
Telecom/Networking/Datacom equipment
Rev. 2.0 July 2014
www.aosmd.com
Page 1 of 15




Alpha & Omega Semiconductors

AOZ1268QI-01 Datasheet Preview

AOZ1268QI-01 Datasheet

28V/10A Synchronous EZBuck Regulator

No Preview Available !

AOZ1268QI-01
Typical Application
RTON
R3
100kΩ
Power Good
C4
1μF
Off On
CSS
TON
IN
VCC
BST
AOZ1268-01
PGOOD
LX
EN
PFM
SS
FB
AGND
PGND
C5
0.1μF
L1
1μH
Input
6.5V to 28V
C2
33μF
R1
2.5kΩ
1%
R2
8kΩ
1%
Output
1.05V, 10A
C3
88μF
*Suggestion: VOUT / (R1 + R2) > 40μA
Ordering Information
Part Number
AOZ1268QI-01
Ambient Temperature Range
-40°C to +85°C
Package
23-Pin 4mm x 4mm QFN
AOS Green Products use reduced levels of Halogens, and are also RoHS compliant.
Please visit www.aosmd.com/media/AOSGreenPolicy.pdf for additional information.
Environmental
Green Product
Pin Configuration
23 22 21 20 19 18
PGOOD 1
17 LX
EN 2
16 LX
PFM 3
AGND 4
IN
15 PGND
LX
14 PGND
FB 5
13 PGND
TON 6
12 PGND
789
10 11
23-Pin 4mm x 4mm QFN
(Top View)
Rev. 2.0 July 2014
www.aosmd.com
Page 2 of 15


Part Number AOZ1268QI-01
Description 28V/10A Synchronous EZBuck Regulator
Maker Alpha & Omega Semiconductors
Total Page 15 Pages
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