AAT1203 AAT, AAT1203 Datasheet

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AAT1203

Manufacturer Part Number
AAT1203
Description
MULTI-INPUT LOW-DROPOUT REGULATOR
Manufacturer
AAT
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AAT1203
Manufacturer:
AAT
Quantity:
309
Part Number:
AAT1203(B65142.15)
Manufacturer:
N/A
Quantity:
20 000
Details are subject to change without notice
Features
Pin Configuration
Complete Power Management
Automatic Input Voltage Selection
Input Voltage Source Detector With
Hysteresis
250-mA Load Current Capability With
VCC50 or VSB50 or AUX33 Input Source
Integrated Low
Regulated Output 3.3V (fixed)
Output Short Circuit Protection
OUT33
VSB50
VCC50
AUX33
( 8-PIN SOP )
1
2
3
4
TOP VIEW
Advanced Analog Technology, Inc.
r
DS
( )
on
8
7
6
5
Switch
Advanced Analog Technology, Inc
台灣類比科技股份有限公司
GND
GND
250-mA MULTI-INPUT LOW-DROPOUT REGULATOR
GND
GND
www.DataSheet4U.com
Page 1 of 16
Description
The AAT1203 is a multi-input low-dropout
regulator designed for LAN cards. It provides
constant output supply 3.3V at an output capable
of driving a 250-mA load.
The AAT1203 is equipped with regulated power
output for systems that have multiple input
sources and require constant voltage source with a
low-dropout voltage. This is an intelligent power
source selection device with a low-dropout
regulator for either VCC50 or VSB50 inputs, and
a low-resistance bypass switch for the AUX33
input.
The AAT1203 allows transitions to progress
smoothly from one input supply to another
without generating a glitch outside of the specified
range of the 3.3-V output. The device has an
incorporated reverse-blocking scheme to prevent
excess leakage from the input terminals in the
event that the output voltage is greater than the
input voltage.
The input voltage is prioritized in the following
order: VCC50, VSB50, AUX33.
.
WITH V
AUX
AAT1203
SWITCH
V 1.0

Related parts for AAT1203

AAT1203 Summary of contents

Page 1

... LAN cards. It provides constant output supply 3. output capable of driving a 250-mA load. The AAT1203 is equipped with regulated power output for systems that have multiple input sources and require constant voltage source with a low-dropout voltage. This is an intelligent power source selection device with a low-dropout www ...

Page 2

... T …………….……………………….. LEAD Page AAT1203 OUTPUT OUTPUT (V) (I) (mA) OUT33 Iout33 ...

Page 3

... Minimal ESR to insure stability of regulated L output Tested for grounded input AUX33, VSB50 or VCC50 = GND, ) Out33 = 3.3V VSB50 or VCC50 ↓ VSB50 or VCC50 ↑ VSB50 = VCC50 = 0V, ) AUX33 = 3.3V 150mA L Without copper for heat spreading JA With copper for heat spreading Page AAT1203 Min Typ Max Unit 4.5 - 5.5 V 4.5 - 5.5 V 3.0 - 3.6 V 4.23 4.70 5.17 µ ...

Page 4

... Advanced Analog Technology, Inc. Note 2 : Design targets only. Not tested in production. Note 3 : Please refer to "Thermal Information" Block Diagram – – 0 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1203 – – ...

Page 5

... VCC50 Detector AUX33 GND GND – – Control Low on Resistance Over Temperature Protection 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1203 VSB50 + 3.3V - OUT33 VSB50 Detector GND GND – – ...

Page 6

... Advanced Analog Technology, Inc. Typical Characteristics – – 0 Fig. 1. 3.3V VCC50 Cold Start Fig. 2. 3.3V VUX33 Cold Start 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1203 – – ...

Page 7

... Advanced Analog Technology, Inc. Typical Characteristics Fig. 3. 3.3V VCC50 Power Up (VSB50=5V) Fig. 4. 3.3V VCC50 Power Up (AUX33=3.3V) – – 0 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1203 – – ...

Page 8

... Advanced Analog Technology, Inc. Typical Characteristics Fig. 5. 3.3V VSB50 Power Up (AUX33=3.3V) Fig. 6. 3.3V VCC50 Power Down (VSB=5V) – – 0 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1203 – – ...

Page 9

... Advanced Analog Technology, Inc. Typical Characteristics Fig. 7. 3.3V VCC50 Power Down (AUX33=3.3V) Fig. 8. 3.3V Load Transient Response Falling. – – 0 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1203 – – ...

Page 10

... Advanced Analog Technology, Inc. Typical Characteristics Fig. 9. 3.3V Load Transient Response Rising – – 0 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1203 – – ...

Page 11

... P =(5-3.3)×0.25=0.425W d Note: The thermal characteristics of the AAT1203 were measured using a double-sided board with two square inches of copper area connected to the GND pins for "heat spreading". The use of multi- layer board construction with power planes will further enhance the thermal performance of the package. ...

Page 12

... VCC50 0.1μF AAT1203 3 OUT33 4.7μF 4 AUX33 0.1μF Typical Application Schematic 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1203 120 150 8 GND GND 7 GND GND 6 GND GND 5 GND GND – ...

Page 13

... Advanced Analog Technology, Inc Page AAT1203 MIN TYP MAX 0.058 0.063 0.068 0.004 --- 0.008 --- 0.057 --- 0.013 0.016 0.020 0.0075 0.008 0.0098 0.189 ...

Page 14

... Advanced Analog Technology, Inc. Tape and Reel 8-Pin SOP – – 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1203 – – 1.0 ...

Page 15

... POCKET POSITION RELATIVE TO SPROCKET HOLE IS MEASURED AS TRUE POSITION OF POCKET, NOT POCKET HOLE. Part Marking SOP8 Top Marking SOP8 Back Marking – – ± 0.2 MILLIMETERS. 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1203 – – 1.0 ...

Page 16

... Advanced Analog Technology, Inc. Ordering Information – – 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1203 – – 1.0 ...

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