AOZ1212DIL

AOZ1212DIL Datasheet

AOZ1212

Part	Datasheet
AOZ1212DIL	AOZ1212DIL (pdf)

Related Parts	Information
AOZ1212AI_5	AOZ1212AI_5
AOZ1212AIL	AOZ1212AIL

PDF Datasheet Preview
AOZ1212 EZBuck 3A Simple Buck Regulator The AOZ1212 is a high efficiency, simple to use, 3A buck regulator flexible enough to be optimized for a variety of applications. The AOZ1212 works from a 4.5V to 27V input voltage range, and provides up to 3A of continuous output current on each buck regulator output. The output voltage is adjustable down to 0.8V. The AOZ1212 comes in an SO-8 or DFN-8 package and is rated over a -40°C to +85°C ambient temperature range. ● 4.5V to 27V operating input voltage range ● internal NFET, efficiency up to 95% ● Internal soft start ● Output voltage adjustable down to 0.8V ● 3A continuous output current ● Fixed 370kHz PWM operation ● Cycle-by-cycle current limit ● Short-circuit protection ● Thermal shutdown ● Small size SO-8 or DFN-8 package ● Point of load DC/DC conversion ● Set top boxes ● DVD drives and HDD ● LCD monitors and TVs ● Cable modems ● Telecom/networking/datacom equipment C1 22µF AOZ1212 VBIAS COMP GND RC CC L1 6.8µH VOUT R1 C2, C3 22µF Figure 3.3V/3A Buck Regulator Page 1 of 18 AOZ1212 Ordering Information Ambient Temperature Range AOZ1212AI AOZ1212DI -40°C to +85°C -40°C to +85°C Package SO-8 5 x 4 DFN-8 AOS Green Products use reduced levels of Halogens, and are also RoHS compliant. Please visit for additional information. Environmental RoHS Compliant Green Product Pin Configuration LX 1 BST 2 GND 3 SO-8 Top View 8 VBIAS 7 VIN 6 EN 5 COMP LX 1 BST 2 GND 3 VIN GND 8 VBIAS 7 VIN 6 EN 5 COMP DFN-8 Top Thru View Pin Description Pin Number Pin Name COMP VBIAS Pin Function PWM output connection to inductor. LX pin needs to be connected externally. Thermal connection for output stage. Bootstrap voltage input. High side driver supply. Connected to 0.1µF capacitor between BST and LX. Ground. Feedback input. It is regulated to 0.8V. The FB pin is used to determine the PWM output voltage via a resistor divider between the output and GND. External loop compensation. Output of internal error amplifier. Connect a series RC network to GND for control loop compensation. Enable pin. The enable pin is active HIGH. Connect EN pin to VIN if not used. Do not leave the EN pin floating. Supply voltage input. Range from 4.5V to 27V. When VIN rises above the UVLO threshold the device starts up. All VIN pins need to be connected externally. Compensation pin of internal linear regulator. Place put a 1µF capacitor between this pin and ground. Page 2 of 18 Block Diagram VBIAS EN UVLO & POR 5V LDO Regulator Reference & Bias Softstart 0.8V GM = 200µA/V EAmp

PDF Datasheet Preview

AOZ1212

EZBuck 3A Simple Buck Regulator

The AOZ1212 is a high efficiency, simple to use, 3A buck regulator flexible enough to be optimized for a variety of applications. The AOZ1212 works from a 4.5V to 27V input voltage range, and provides up to 3A of continuous output current on each buck regulator output. The output voltage is adjustable down to 0.8V.

The AOZ1212 comes in an SO-8 or DFN-8 package and is rated over a -40°C to +85°C ambient temperature range.
● 4.5V to 27V operating input voltage range
● internal NFET, efficiency up to 95%
● Internal soft start ● Output voltage adjustable down to 0.8V ● 3A continuous output current ● Fixed 370kHz PWM operation ● Cycle-by-cycle current limit ● Short-circuit protection ● Thermal shutdown ● Small size SO-8 or DFN-8 package
● Point of load DC/DC conversion ● Set top boxes ● DVD drives and HDD ● LCD monitors and TVs ● Cable modems ● Telecom/networking/datacom equipment

C1 22µF

AOZ1212

VBIAS

COMP GND

RC CC

L1 6.8µH

VOUT

R1 C2, C3 22µF

Figure 3.3V/3A Buck Regulator

Page 1 of 18

AOZ1212
Ordering Information

Ambient Temperature Range

AOZ1212AI AOZ1212DI
-40°C to +85°C -40°C to +85°C

Package SO-8
5 x 4 DFN-8

AOS Green Products use reduced levels of Halogens, and are also RoHS compliant. Please visit for additional information.

Environmental

RoHS Compliant Green Product

Pin Configuration

LX 1 BST 2 GND 3

SO-8

Top View
8 VBIAS 7 VIN 6 EN 5 COMP

LX 1 BST 2 GND 3

VIN GND
8 VBIAS 7 VIN 6 EN 5 COMP

DFN-8

Top Thru View

Pin Description

Pin Number Pin Name

COMP

VBIAS

Pin Function

PWM output connection to inductor. LX pin needs to be connected externally. Thermal connection for output stage.

Bootstrap voltage input. High side driver supply. Connected to 0.1µF capacitor between BST and LX.

Ground.

Feedback input. It is regulated to 0.8V. The FB pin is used to determine the PWM output voltage via a resistor divider between the output and GND.

External loop compensation. Output of internal error amplifier. Connect a series RC network to GND for control loop compensation.

Enable pin. The enable pin is active HIGH. Connect EN pin to VIN if not used. Do not leave the EN pin floating.

Supply voltage input. Range from 4.5V to 27V. When VIN rises above the UVLO threshold the device starts up. All VIN pins need to be connected externally. Compensation pin of internal linear regulator. Place put a 1µF capacitor between this pin and ground.

Page 2 of 18

Block Diagram

VBIAS EN

UVLO & POR
5V LDO Regulator

Reference & Bias

Softstart
0.8V

GM = 200µA/V

EAmp

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Datasheet ID: AOZ1212DIL 516312