AOZ1236QI-01 Regulator Datasheet

AOZ1236QI-01 Datasheet, PDF, Equivalent


Part Number

AOZ1236QI-01

Description

28V/6A Synchronous Regulator

Manufacture

Alpha & Omega Semiconductors

Total Page 16 Pages
Datasheet
Download AOZ1236QI-01 Datasheet


AOZ1236QI-01
AOZ1236QI-01
28V/6A Synchronous EZBuckTM Regulator
General Description
The AOZ1236-01 is a high-efficiency, easy-to-use DC/DC
synchronous buck regulator that operates up to 28V.
The device is capable of supplying 6A of continuous
output current with an output voltage adjustable down to
0.8V (±1.0%).
The AOZ1236-01 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 AOZ1236-01 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
2.7V to 28V
6A continuous output current
Output voltage adjustable down to 0.8V (±1.0%)
Low RDS(ON) internal NFETs
35mhigh-side
12mlow-side SRFET
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 February 2014
www.aosmd.com
Page 1 of 16

AOZ1236QI-01
Typical Application
AOZ1236QI-01
RTON
R3
100kΩ
Power Good
C4
1μF
Off On
CSS
TON
IN
VCC
BST
AOZ1236-01
PGOOD
LX
EN
PFM
SS
FB
AGND
PGND
C5
0.1μF
L1
1μH
C2
20μF
Input
6.5V to 28V
R1
25kΩ
1%
R2
80kΩ
1%
Output
1.05V, 8A
C3
88μF
External VCC Bias
RTON
5V
R3
100kΩ
Power Good
C4
1μF
Off On
CSS
TON
IN
AIN
VCC
BST
AOZ1236-01
PGOOD
LX
EN
PFM
SS
FB
AGND
PGND
C5
0.1μF
L1
1μH
C2
20μF
Input
2.7V to 28V
R1
25kΩ
1%
R2
80kΩ
1%
Output
1.05V, 8A
C3
88μF
Rev. 2.0 February 2014
www.aosmd.com
Page 2 of 16


Features AOZ1236QI-01 28V/6A Synchronous EZBuckTM Regulator General Description The AOZ 1236-01 is a high-efficiency, easy-to-u se DC/DC synchronous buck regulator tha t operates up to 28V. The device is cap able of supplying 6A of continuous outp ut current with an output voltage adjus table down to 0.8V (±1.0%). The AOZ123 6-01 integrates an internal linear regu lator to generate 5.3V VCC from input. If input voltage is lower than 5.3V, th e linear regulator operates at low drop output mode, which allows the VCC volta ge is equal to input voltage minus the drop-output voltage of the internal lin ear regulator. A proprietary constant o n-time PWM control with input feed-forw ard results in ultra-fast transient res ponse while maintaining relatively cons tant switching frequency over the entir e input voltage range. The switching fr equency 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-volta.
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