AAT1205 AAT, AAT1205 Datasheet

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AAT1205

Manufacturer Part Number
AAT1205
Description
MULTI-INPUT LOW-DROPOUT REGULATOR
Manufacturer
AAT
Datasheet
Details are subject to change without notice
Features
Pin Configuration
OUT33
VSB50
VCC50
Complete Power Management
Automatic Input Voltage Selection
Input Voltage Source Detector With
Hysteresis
400-mA Load Current Capability With
VCC50、VSB50 or AUX33 Input Source
Integrated Low
Dual Regulated Output 3.3V(fixed)& 2.5V
(fixed)
Output Short Circuit Protection (SCP)
AUX33
( 8-PIN SOP )
1
2
3
4
TOP VIEW
400-mA MULTI-INPUT LOW-DROPOUT REGULATOR WITH DUAL
Advanced Analog Technology, Inc.
r
DS
8
7
6
5
( )
on
Switch
OUT25
GND
GND
EN25
Advanced Analog Technology, Inc
台灣類比科技股份有限公司
www.DataSheet4U.com
Page 1 of 21
Description
The AAT1205 is a multi-input low-dropout
regulator (LDO) specially designed for LAN cards.
It provides advanced dual constant output supply
3.3V & 2.5V at the output capable of driving a
400-mA load.
disabled by connecting EN25 pin to GND.
The AAT1205 is equipped with dual regulated
power output for systems with multiple input
sources and require dual 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 AAT1205 allows transitions to progress
smoothly from one input supply to another without
generating a glitch outside of the specified range
of 3.3V & 2.5V output. Furthermore, this device
has an incorporated reverse-blocking scheme to
prevent excessive 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.
OUTPUT POWER MANAGEMENT
The output (OUT25) can be
.
V 1.0
AAT1205

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AAT1205 Summary of contents

Page 1

... It provides advanced dual constant output supply 3.3V & 2.5V at the output capable of driving a 400-mA load. disabled by connecting EN25 pin to GND. The AAT1205 is equipped with dual regulated power output for systems with multiple input sources and require dual constant voltage source with a low-dropout voltage. This is an intelligent www ...

Page 2

... Auxiliary Supply Input O 2.5V Regulated Output I Enable Input of OUT25 I Ground I Ground 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1205 OUTPUT OUTPUT (V) (I)(mA) OUT33 OUT25 Iout33+Iout25 ...

Page 3

... Page ………………….……….260℃ ) LEAD Min Typ Max 4.5 - 5.5 4.5 - 5.5 3.0 - 3.6 4.23 4.70 5. 400 – – . AAT1205 − V~7V − V~ − V~ ℃ ℃ − to +125 ℃ ℃ − to +130 ℃ ℃ Unit ...

Page 4

... Advanced Analog Technology, Inc Page Min Typ 4.5 5.0 3.135 3.300 2.375 2.500 - 1 1.0 L 0 150 - - 4.0 4.2 4.25 4. – – 1.0 AAT1205 Max Unit 5.5 V 3.465 V 2.625 3 1.5 180 ℃ µF 50 µA 4.4 V 4.65 V 0.4 Ω ℃ ...

Page 5

... Function Block VCC50 AUX33 GND – – + 3.3V - VCC50 Control Detector Low on Resistance 2.5V Over Temperature Protection 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1205 VSB50 + 3.3V - OUT33 VSB50 Detector EN25 + - OUT25 – – 1.0 ...

Page 6

... Advanced Analog Technology, Inc. Typical Characteristics – – Fig. 1. 3.3V VCC50 Cold Start Fig. 2. 2.5V VCC50 Cold Start 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1205 – – 1.0 ...

Page 7

... Advanced Analog Technology, Inc. Typical Characteristics – – Fig. 3. 3.3V AUX33 Cold Start Fig. 4. 2.5V AUX33 Cold Start 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1205 – – 1.0 ...

Page 8

... Advanced Analog Technology, Inc. Typical Characteristics – – Fig. 5. 3.3V VCC50 Power Up (VSB50=5V) Fig. 6. 2.5V VCC50 Power Up (VSB50=5V) 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1205 – – 1.0 ...

Page 9

... Advanced Analog Technology, Inc. Typical Characteristics – – Fig. 7. 3.3V VCC50 Power Up (AUX33=3.3V) Fig. 8. 2.5V VCC50 Power Up (AUX33=3.3V) 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1205 – – 1.0 ...

Page 10

... Advanced Analog Technology, Inc. Typical Characteristics – – Fig. 9. 3.3V VSB50 Power Up (AUX33=3.3V) Fig. 10. 2.5V VSB50 Power Up (AUX33=3.3V) 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1205 – – 1.0 ...

Page 11

... Advanced Analog Technology, Inc. Typical Characteristics – – Fig.11. 3.3V VCC50 Power Down (VSB=5V) Fig. 12. 2.5V VCC50 Power Down (VSB=5V) 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1205 – – 1.0 ...

Page 12

... Advanced Analog Technology, Inc. Typical Characteristics Fig. 13. 3.3V VCC50 Power Down (AUX33=3.3V) Fig. 14. 2.5V VCC50 Power Down (AUX33=3.3V) – – 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1205 – – 1.0 ...

Page 13

... Advanced Analog Technology, Inc. Typical Characteristics – – Fig. 15. 3.3V Load Transient Response Falling Fig. 16. 2.5V Load Transient Response Falling 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1205 – – 1.0 ...

Page 14

... Advanced Analog Technology, Inc. Typical Characteristics – – Fig. 17. 3.3V Load Transient Response Rising Fig. 18. 2.5V Load Transient Response Rising 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1205 – – 1.0 ...

Page 15

... The AAT1205 is housed in a thermal enhanced package where the power pad is located in the bottom of the device. When the power pad is soldered on a double-sided printed circuit board with two square inches of copper allocated for "heat spreading", the resulting θ allowable for an operating ambient temperature and a maximum junction temperature of 150 determined as : ...

Page 16

... PCB Layout Example – – Ambient Temperature -°C Power Dissipation Derating Curves 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page 104 150 – – 1.0 AAT1205 ...

Page 17

... Typical Application Schematic - Only OUT33 Used 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page GND 7 GND 6 TO OUT33 or EN25 FLOATING 5 2.5V 4.7μ GND or GND FLOATIN 7 GND 6 GND EN25 5 GND or OUT25 FLOATIN – – . AAT1205 V 1.0 ...

Page 18

... Advanced Analog Technology, Inc Page AAT1205 θ DEMINSIONS IN 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 ...

Page 19

... 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 AAT1205 – – 1.0 ...

Page 20

... POCKET POSITION RELATIVE TO SPROCKET HOLE IS MEASURED AS TRUE POSITION OF POCKET, NOT POCKET HOLE. Part Marking SOP8 Top Marking AAT1205 XXXXXX SOP8 Back Marking YYWW – – ± 0.2 MILLIMETERS. 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1205 – – 1.0 ...

Page 21

... Advanced Analog Technology, Inc. Ordering Information – – 台灣類比科技股份有限公司 Advanced Analog Technology, Inc Page AAT1205 – – 1.0 ...

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