AOZ1012DI Alpha & Omega Semiconductor Inc, AOZ1012DI Datasheet

IC 3A BUCK REG 8-DFN

AOZ1012DI

Manufacturer Part Number
AOZ1012DI
Description
IC 3A BUCK REG 8-DFN
Manufacturer
Alpha & Omega Semiconductor Inc
Series
EZBuck™r
Type
Step-Down (Buck)r
Datasheet

Specifications of AOZ1012DI

Internal Switch(s)
Yes
Synchronous Rectifier
No
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
785-1148-2
General Description
The AOZ1012D is a high efficiency, simple to use, 3A
buck regulator. The AOZ1012D 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 AOZ1012D comes in 4X5 DFN-8 packages and is
rated over a -40°C to +85°C ambient temperature range.
Typical Application
Rev. 1.3 October 2009
From µPC
C C
R C
VIN
C1
22µF
C5
Figure 1. 3.3V/3A Buck Regulator
EN
COMP
AOZ1012D
AGND
www.aosmd.com
U1
VIN
GND
Features
Applications
4.5V to 16V operating input voltage range
50m
up to 95%
Internal Schottky diode
Internal soft start
Output voltage adjustable to 0.8V
3A continuous output current
Fixed 500kHz PWM operation
Cycle-by-cycle current limit
Short-circuit protection
Thermal shutdown
Small size DFN-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
FB
LX
internal PFET switch for high efficiency:
L1
EZBuck™ 3A Simple Regulator
AOZ1012D
C4
R1
R2
VOUT
C2, C3
Page 1 of 15

Related parts for AOZ1012DI

AOZ1012DI Summary of contents

Page 1

General Description The AOZ1012D is a high efficiency, simple to use, 3A buck regulator. The AOZ1012D works from a 4.5V to 16V input voltage range, and provides continuous output current with an output voltage adjustable down ...

Page 2

... Ordering Information Part Number Ambient Temperature Range AOZ1012DI* -40°C to +85°C * Not recommended for new designs. Replacement part is AOZ1092. All AOS Products are offeed in packages with Pb-free plating and compliant to RoHS standards. Please visit wwww.aosmd.com/web/rohs_compliant.jsp Pin Configuration Pin Description Pin Number ...

Page 3

Absolute Maximum Ratings Exceeding the Absolute Maximum ratings may damage the device. Parameter Supply Voltage (V ) 18V AGND -0. AGND -0. AGND -0. COMP to AGND ...

Page 4

Typical Performance Characteristics Circuit of Figure 25° Light Load (DCM) Operation 1μs/div Startup to Full Load 1ms/div 50% to 100% Load Transient 100μs/div Rev. 1.3 October 2009 = 12V ...

Page 5

... Ambient Temperature (T Rev. 1.3 October 2009 (Continued) = 12V 3.3V unless otherwise specified. OUT Vo 2V/div IL 2A/div AOZ1012DI Efficiency Efficiency (V = 12V) vs. Load Current IN 8.0V OUTPUT 5.0V OUTPUT 3.3V OUTPUT 0.5 1.0 1.5 2.0 Load Current (A) 3.5 3.0 2.5 1.8V OUTPUT 2.0 1.5 1 ...

Page 6

Detailed Description The AOZ1012D is a current-mode step down regulator with integrated high side PMOS switch and a low side freewheeling Schottky diode. It operates from a 4.5V to 16V input voltage range and supplies load ...

Page 7

The combination of R and R should be large enough avoid drawing excessive current from the output, which will cause power loss. Since the switch duty cycle can be as high as 100%, the maximum output voltage ...

Page 8

I (m) CIN_RMS I O 0.2 0 0.5 m Figure 2. I vs. Voltage Conversion Ratio CIN For reliable operation and best performance, the input capacitors must have current rating higher than I at the ...

Page 9

ESR. It can be calculated by the equation below: 1 ⎛ ΔV ΔI × ------------------------- ESR = + ⎝ × × where output capacitor value, and O ESR is the ...

Page 10

However, the bandwidth should not be too high because of system stability concerns. When designing the compensation loop, converter stability under all line and load condition must be considered. Usually recommended to set the ...

Page 11

The thermal performance of the AOZ1012D is strongly affected by the PCB layout. Extra care should be taken by users during the design process to ensure that the IC will operate under the recommended environmental conditions. Several layout tips are ...

Page 12

Package Dimensions, DFN 5x4 D aaa C ccc C A ddd Recommended Land Pattern 2.125 1.775 2.7 0.8 0.5 0.95 Unit: mm Notes: 1. Dimensions and tolerancing conform to ASME Y14.5M-1994. 2. All dimensions are in millimeters. ...

Page 13

Tape Dimensions, DFN 5x4 Tape Unit: mm Package DFN 5x4 5.30 4.30 1.20 ±0.10 ±0.10 ±0.10 (12 mm) Leader/Trailer and Orientation Trailer Tape (300mm Min.) Rev. 1.3 October 2009 ...

Page 14

Reel Dimensions, DFN 5x4 II M 6.45±0.05 6.2 8.9±0.1 14 REF 11.90 41.5 REF 43.00 44.5±0.1 10.0 A 2.00 6.50 Rev. 1.3 October 2009 Zoom In A N=ø100±2 1.8 2.20 5.0 1.8 12 REF 6.50 VIEW: C ...

Page 15

AOZ1012D Package Marking Fab & Assembly Location Rev. 1.3 October 2009 Z1012DI Part Number Code FAYWLT Assembly Lot Code Year & Week Code www.aosmd.com AOZ1012D Page ...

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