AAT1204 AAT, AAT1204 Datasheet

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AAT1204

Manufacturer Part Number
AAT1204
Description
MULTI-INPUT LOW-DROPOUT REGULATOR
Manufacturer
AAT
Datasheet
Features
Pin Configuration
OUT33
VSB50
VCC50
AUX33
Complete Power Management
Automatic Input Voltage Selection
Input Voltage Source Detector With
Hysteresis
400-mA Load Current Capability With
VCC50 or VSB50 or AUX33 Input Source
Integrated Low r
Regulated Output 3.3V (fixed)
Output Short Circuit Protection
( 8-PIN SOIC )
1
2
3
4
TOP VIEW
Advanced Analog Technology, Inc.
DS (on)
8
7
6
5
Switch
GND
GND
GND
GND
台灣類比科技股份有限公司
Advanced Analog Technology, Inc
400-mA MULTI-INPUT LOW-DROPOUT REGULATOR
www.DataSheet4U.com
Description
The AAT1204 is a multi-input low-dropout
regulator that provides constant output supply
3.3V at the output capable of driving a 400-mA
load.
The AAT1204 provides regulated power output
for systems that have multiple input sources and
require
low-dropout voltage. This is a 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.
Transitions may occur from one input supply to
another without generating a glitch outside of the
specification range on 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.
constant
voltage
.
WITH V
source
AUX
AAT1204
SWITCH
V 1.0
with
a

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AAT1204 Summary of contents

Page 1

... GND AUX33 ( 8-PIN SOIC ) – 400-mA MULTI-INPUT LOW-DROPOUT REGULATOR Description The AAT1204 is a multi-input low-dropout regulator that provides constant output supply 3.3V at the output capable of driving a 400-mA load. The AAT1204 provides regulated power output for systems that have multiple input sources and require low-dropout voltage ...

Page 2

... LEAD ( ) 台灣類比科技股份有限公司 Advanced Analog Technology, Inc AAT1204 OUTPUT OUTPUT (V) (I) (mA) OUT33 ...

Page 3

... 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 台灣類比科技股份有限公司 Advanced Analog Technology, Inc AAT1204 Min Typ Max Unit 4.5 5.5 V 4.5 5 ...

Page 4

... Advanced Analog Technology, Inc. VCC50 3.3V 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 AAT1204 VSB50 + 3.3V - OUT33 VSB50 Detector GND GND – 1.0 ...

Page 5

... Advanced Analog Technology, Inc. TYPICAL CHARACTERISTICS Figure 1. 3.3V VCC50 Cold Start Figure 2. 3.3V AUX33 Cold Start – 台灣類比科技股份有限公司 Advanced Analog Technology, Inc AAT1204 – 1.0 ...

Page 6

... Advanced Analog Technology, Inc. TYPICAL CHARACTERISTICS Figure 3. 3.3V VCC50 Power Up(VSB50=5V) Figure 4. 3.3V VCC50 Power Up(AUX33=3.3V) – 台灣類比科技股份有限公司 Advanced Analog Technology, Inc AAT1204 – 1.0 ...

Page 7

... Advanced Analog Technology, Inc. TYPICAL CHARACTERISTICS Figure 5. 3.3V VSB50 Power Up(AUX33=3.3V) Figure 6. 3.3V VCC50 Power Down(VSB=5V) – 台灣類比科技股份有限公司 Advanced Analog Technology, Inc AAT1204 – 1.0 ...

Page 8

... Advanced Analog Technology, Inc. TYPICAL CHARACTERISTICS Figure 7. 3.3V VCC50 Power Down(AUX33=3.3V) Figure 8. 3.3V Load Transient Response Falling. TYPICAL CHARACTERISTICS – 台灣類比科技股份有限公司 Advanced Analog Technology, Inc AAT1204 – 1.0 ...

Page 9

... Advanced Analog Technology, Inc. Figure 9. 3.3V Load Transient Response Rising – 台灣類比科技股份有限公司 Advanced Analog Technology, Inc AAT1204 – 1.0 ...

Page 10

... D Note: The thermal characteristics of the AAT1204 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 11

... NOTE: These curves are to be used for guideline purposes only. For a particular application, a more specijic thermal characterization is required. Power Dissipation Derating Curves – 台灣類比科技股份有限公司 Advanced Analog Technology, Inc 83 102 150 – . AAT1204 V 1.0 ...

Page 12

... Typical Application Schematic – 台灣類比科技股份有限公司 Advanced Analog Technology, Inc 1 8 VSB50 GND 7 2 VCC50 GND AAT1204 6 3 OUT33 GND 5 4 GND AUX33 AAT1204 GND GND GND GND – 1.0 ...

Page 13

... Advanced Analog Technology, Inc AAT1204 E1 7°(4X) eB Nom Max 1.600 1.702 0.610 0.66 0.406 0.508 4.826 4.877 3.912 3.962 5 ...

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