Document
AOZ2263QI-15
28V/12A Synchronous EZBuckTM Regulator
General Description
The AOZ2263QI-15 is a high-efficiency, easy-to-use DC/ DC synchronous buck regulator that operates up to 28V. The device is capable of supplying 12A of continuous output current with an output voltage adjustable down to 0.8V (±1.0%).
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 on-time can be externally programmed up to 2.6µs.
The device features multiple protection functions such as VCC under-voltage lockout, cycle-by-cycle current limit, output over-voltage protection, short-circuit protection, and thermal shutdown.
The AOZ2263QI-15 is available in a 4mm x 4mm QFN22L package and is rated over a -40°C to +85°C ambient temperature range.
Features
Wide input voltage range – 2.7V to 28V
12A continuous output current Output voltage adjustable down to 0.8V (±1.0%) Low RDS(ON) internal NFETs
– 18m high-side – 7m low-side Constant On-Time with input feed-forward Programmable on-time up to 2.6µs Selectable PFM light load operation Ceramic capacitor stable Adjustable soft start Ripple reduction Power Good output Integrated bootstrap diode Cycle-by-cycle current limit Short-circuit protection Thermal shutdown Thermally enhanced 4mm x 4mm QFN-22L 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 March 2019
www.aosmd.com
Page 1 of 16
AOZ2263QI-15
Typical Application
RTON
5V
R3 100kΩ
Power Good
C4 4.7μF
Off On
CSS
TON
IN
BST VCC
AOZ2263QI-15
PGOOD
LX
EN PFM SS
FB
AGND PGND
C5 0.1μF
L1 1μH
Input 2.7V to 28V C2 22μF
Output 1.05V, 12A R2
C3 88μF R1
Power Ground Analog Ground
Rev. 2.0 March 2019
www.aosmd.com
Page 2 of 16
Ordering Information
Part Number AOZ2263QI-15
Ambient Temperature Range -40°C to +85°C
Package 22-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.
Pin Configuration
AOZ2263QI-15
Environmental Green Product
PGND
LX
BST
VCC
SS
22
21 20 19 18
PGOOD 1
EN 2
PFM 3 IN
AGND 4
FB 5
TON 6
17 LX
16 LX
15 PGND LX
14 PGND
13 PGND
12 PGND
789
10 11
LX
LX
IN
IN
IN
22-Pin 4mm x 4mm QFN (Top View)
Rev. 2.0 March 2019
www.aosmd.com
Page 3 of 16
AOZ2263QI-15
Pin Description
Pin Number
Pin Name
1
PGOOD
2
3 4 5 6 7, 8, 9 12, 13, 14, 15, 19 10, 11, 16, 17, 18
20
21
22
EN
PFM AGND
FB TON
IN PGND
LX
BST
VCC
SS
Pin Function
Power Good Signal Output. PGOOD is an open-drain output used to indicate the status of the output voltage. It is internally pulled low when the output voltage is 15% lower than the nominal regulation voltage for or 20% higher than the nomin.