AOZ1022DI Alpha & Omega Semiconductor Inc, AOZ1022DI Datasheet

IC 3A SYNC BUCK REG 8-DFN

AOZ1022DI

Manufacturer Part Number
AOZ1022DI
Description
IC 3A SYNC BUCK REG 8-DFN
Manufacturer
Alpha & Omega Semiconductor Inc
Series
EZBuck™r
Type
Step-Down (Buck)r
Datasheet

Specifications of AOZ1022DI

Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
0.8 ~ 16 V
Current - Output
3A
Frequency - Switching
500kHz
Voltage - Input
4.5 ~ 16 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-DFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
785-1156-2

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Part Number
Manufacturer
Quantity
Price
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General Description
The AOZ1022 is a synchronous high efficiency, simple
to use, 3A buck regulator. The AOZ1022 works from a
4.5V to 16V input voltage range, and provides up to 3A
of continuous output current with an output voltage
adjustable down to 0.8V.
The AOZ1022 comes in a DFN 5x4 and an EPAD SO-8
package and is rated over a -40°C to +85°C ambient
temperature range.
Typical Application
Rev. 1.6 December 2010
VIN
C1
22µF
Ceramic
R
C
C
C
Figure 1. 3.3V/3A Synchronous Buck Regulator
EN
COMP
AGND
VIN
AOZ1022
www.aosmd.com
PGOOD
PGND
R3
Features
Applications
LX
FB
4.5V to 16V operating input voltage range
Synchronous rectification: 100m
switch and 20m
High efficiency: up to 95%
Internal soft start
Active high power good state
Output voltage adjustable to 0.8V
3A continuous output current
Fixed 500kHz PWM operation
Cycle-by-cycle current limit
Pre-bias start-up
Short-circuit protection
Thermal shutdown
Small size DFN 5x4 and EPAD SO-8 package
Point of load DC-DC conversion
PCIe graphics cards
Set top boxes
DVD drives and HDD
LCD panels
Cable modems
Telecom/networking/datacom equipment
5V DC
EZBuck™ 3A Synchronous Buck Regulator
L1 4.7µH
Internal low-side switch
R1
R2
VOUT
C2, C3
22µF Ceramic
AOZ1022
internal high-side
Page 1 of 17

Related parts for AOZ1022DI

AOZ1022DI Summary of contents

Page 1

General Description The AOZ1022 is a synchronous high efficiency, simple to use, 3A buck regulator. The AOZ1022 works from a 4.5V to 16V input voltage range, and provides continuous output current with an output voltage adjustable ...

Page 2

... Ordering Information Part Number Ambient Temperature Range AOZ1022DI -40°C to +85°C AOZ1022 -40°C to +85°C AOS Green Products use reduced levels of Halogens, and are also RoHS compliant. Please visit www.aosmd.com/web/quality/rohs_compliant.jsp Pin Configuration PGND 1 LX VIN 2 AGND 3 GND FB 4 5x4 DFN-8 (Top View) ...

Page 3

Block Diagram UVLO EN & POR Reference Softstart & Bias + 0.8V EAmp FB – COMP Frequency Foldback Comparator + – 0.2V PGOOD – + 0.72V Absolute Maximum Ratings Exceeding the Absolute Maximum Ratings may damage the device. Parameter Supply ...

Page 4

Electrical Characteristics T = 25° 12V 3.3V unless otherwise specified OUT Symbol Parameter V Supply Voltage IN V Input Under-Voltage Lockout Threshold UVLO I Supply Current (Quiescent Shutdown Supply ...

Page 5

Typical Performance Characteristics Circuit of Figure 25° Light Load Operation 1s/div Startup to Full Load 1ms/div 50% to 100% Load Transient 100s/div Rev. 1.6 December 2010 = 12V 3.3V ...

Page 6

Efficiency AOZ1022 Efficiency Efficiency (V = 12V) vs. Load Current IN 100 0.5 1.0 1.5 Load Current (A) Thermal Derating Curves Derating Curve at 5V/6V Input 5 4 1.2V, 1.8V OUTPUT 3 ...

Page 7

Detailed Description The AOZ1022 is a current-mode step down regulator with integrated high-side PMOS switch and a low-side NMOS switch. It operates from a 4.5V to 16V input voltage range and supplies load current. The duty ...

Page 8

Some standard value and most used output 1 2 voltage values are listed in Table 1. Ω 0.8 1.0 1.2 4.99 1.5 10 1.8 12.7 2.5 21.5 3.3 31.1 ...

Page 9

I (m) CIN_RMS I O 0.2 0 0.5 m Figure 2. I vs. Voltage Conversion Ratio CIN Note that the ripple current rating from capacitor manu- factures are based on certain amount of life time. ...

Page 10

Loop Compensation The AOZ1022 employs peak current mode control for easy use and fast transient response. Peak current mode control eliminates the double pole effect of the output L&C ...

Page 11

An easy-to-use application software which helps to design and simulate the compensation loop can be found at www.aosmd.com. Thermal Management and Layout Consideration In the AOZ1022 buck regulator circuit, high pulsing current flows through two circuit loops. The first loop ...

Page 12

Package Dimensions, DFN 5x4 Index Area (D/2 x E/2) TOP VIEW A FRONT VIEW RECOMMENDED LAND PATTERN 0.95 Typ. 2.25 1.86 0.65 4.20 0.40 4.51 Notes: 1. Dimensions and tolerancing conform to ASME Y14.5M-1994. 2. All dimensions are in millimeters. ...

Page 13

Tape Dimensions, DFN 5x4 UNIT: mm Package DFN 5x4 5.30 4.30 1.20 (12 mm) ±0.10 ±0.10 ±0.10 Leader/Trailer and Orientation Trailer Tape 300mm Min. Rev. 1.6 December 2010 ...

Page 14

Reel Dimensions, DFN 5x4 II M Tape Size Reel Size M ø330 12mm ø330 +0.3 -4.0 6.450.05 6.2 8.90.1 14 REF 11.90 41.5 REF 43.00 44.50.1 10.0 A Rev. 1.6 December 2010 12.40 2.40 0.5 ...

Page 15

Package Dimensions, EPAD SO (4x) B RECOMMENDED LAND PATTERN 3.70 2.20 2.71 2.87 0.80 1.27 0.635 UNIT: mm Notes: 1. Package body sizes exclude mold flash and gate burrs. 2. Dimension L is measured ...

Page 16

Tape and Reel Dimensions, EPAD SO-8 Carrier Tape UNIT: mm Package A0 B0 SO-8 6.40 5.20 ±0.10 ±0.10 (12mm) Reel R UNIT: mm Tape Size Reel Size M 12mm ø330 ø330.00 ±0.50 Leader/Trailer and Orientation Trailer ...

Page 17

Part Marking Fab & Assembly Location Fab & Assembly Location This data sheet contains preliminary data; supplementary data may be published at a later date. Alpha & Omega Semiconductor reserves the right to make changes at any time without notice. ...

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