aoz1038di Alpha & Omega Semiconductor, aoz1038di Datasheet

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aoz1038di

Manufacturer Part Number
aoz1038di
Description
Ezbucktm 6 A Synchronous Buck Regulator
Manufacturer
Alpha & Omega Semiconductor
Datasheet

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Part Number:
AOZ1038DI
Manufacturer:
AOS/万代
Quantity:
20 000
General Description
The AOZ1038 is a high efficiency, easy to use, 6 A
synchronous buck regulator. The AOZ1038 works from a
4.5 V to 18 V input voltage range and provides up to 6 A
of continuous output current with an output voltage
adjustable down to 0.8 V.
The AOZ1038 is available in a 5x6 DFN-8 package or an
exposed pad SO-8 package. Both are rated over a -40 °C
to +85 °C ambient temperature range.
Typical Application
Rev. 1.2 February 2011
VIN
C1
22µF
Ceramic
R
C
C
C
EN
COMP
Figure 1. 3.3V 6 A Synchronous Buck Regulator
AGND
VIN
AOZ1038
www.aosmd.com
PGND
LX
FB
Features
Applications
4.5 V to 18 V operating input voltage range
Synchronous Buck: 55 mΩ internal high-side switch
and 12 mΩ Internal low-side switch
High efficiency: up to 95 %
Internal soft start
Active high power good state
Output voltage adjustable to 0.8 V
6 A continuous output current
Fixed 450 kHz PWM operation
Cycle-by-cycle current limit
Pre-bias start-up
Short-circuit protection
Thermal shutdown
Thermally enhanced 5x6 DFN-8 and exposed pad
SO-8 packages
Point of load DC/DC converters
LCD TV
Set top boxes
DVD / Blu-ray players/recorders
Cable modems
PCIe graphics cards
EZBuck™ 6 A Synchronous Buck Regulator
L1
2.2µH
R1
R2
VOUT = 1.2V
C2, C3, C4
22µF
Ceramic
AOZ1038
Page 1 of 14

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aoz1038di Summary of contents

Page 1

General Description The AOZ1038 is a high efficiency, easy to use synchronous buck regulator. The AOZ1038 works from a 4 input voltage range and provides continuous output current with ...

Page 2

... Ordering Information Part Number Ambient Temperature Range AOZ1038DI AOZ1038PI 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 VIN 2 PAD (LX) AGND 5x6 DFN-8 (Top View) Pin Description Pin Number Exposed 5x6 DFN-8 ...

Page 3

Block Diagram UVLO EN & POR Regulator Reference Softstart & Bias + 0.8V EAmp FB – COMP Short Circuit Detection Comparator + – 0.2V Absolute Maximum Ratings Exceeding the Absolute Maximum ratings may damage the device. Parameter Supply Voltage (V ...

Page 4

Electrical Characteristics ° 3.3 V unless otherwise specified. Specifications in BOLD indicate a temperature range OUT of -40 °C to +85 °C. Symbol Parameter V Supply ...

Page 5

Detailed Description The AOZ1038 is a current-mode step down regulator with an integrated high-side PMOS switch and a low-side NMOS switch. It operates from a 4 input voltage range and supplies ...

Page 6

Table 1. Vo (V) R1 (kΩ) 0.8 1.0 1.2 4.99 1.5 10 1.8 12.7 2.5 21.5 3.3 31.1 5.0 52.3 The combination of R and R should be large enough avoid drawing excessive current from the output, ...

Page 7

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 8

In a buck converter, output capacitor current is continuous. The RMS current of the output capacitor is decided by the peak to peak inductor ripple current. It can be calculated by: ΔI L ---------- I = CO_RMS 12 Usually, the ...

Page 9

The equation above can also be simplified to: × --------------------- = easy-to-use application software which helps to design and simulate the compensation loop can be found at www.aosmd.com. Thermal Management and ...

Page 10

Package Dimensions, Exposed Pad 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 ...

Page 11

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

Page 12

Package Dimensions, 5x6 DFN, 8L 0.05 e TOP VIEW BOTTOM VIEW RECOMMENDED LAND PATTERN 0.5000 0.6500 1.6750 3.3500 4.6000 2.7500 1.2700 UNIT: mm Notes: 1. Package body sizes exclude mold flash and gate burrs. Mold flash at ...

Page 13

Tape and Reel Dimensions, 5x6 DFN, 8L Carrier Tape UNIT: MM Package A0 DFN 5x6 6.30 (12mm) ±0.10 Reel R UNIT: MM Tape Size Reel Size ø 330 ø 330.0 ±0.50 Leader/Trailer ...

Page 14

Part Marking Fab & Assembly Location Fab & Assembly Location This datasheet 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. LIFE ...

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