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AAT1201 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 AAT1201
기능 MULTI-INPUT LOW-DROPOUT REGULATOR
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AAT1201 데이터시트, 핀배열, 회로
Advanced Analog Technology, Inc.
Details are subject to change without notice
AAT1201
250-mA MULTI-INPUT LOW-DROPOUT REGULATOR
WITH DUAL-OUTPUT POWER MANAGEMENT
Features
Description
z Complete Power Management
z Automatic Input Voltage Selection
The AAT1201 is a multi-input low-dropout
regulator (LDO) designed for LAN card. It
z Input Voltage Source Detector with Hysteresis provides dual constant output supply 3.3V & 2.5V
z 250-mA Load Current Capability with
VCC50 or VSB50 or AUX33 Input Source
at the output capable of driving a 250-mA load.
The output (OUT25) can be disabled by
z Integrated Low rDS(on) Switch
connecting EN25 pin to GND.
z Dual Regulated Output 3.3V (fixed) & 2.5V
(fixed)
The AAT1201 provides dual regulated power
output for systems with multiple input sources and
z Output Short Circuit Protection (SCP)
require dual constant voltage source with a
low-dropout voltage. This is an intelligent power
Pin Configuration
www.DataSheet4U.com
source selection device with a LDO regulator for
either VCC50 or VSB50 inputs, and a
low-resistance bypass switch for the AUX33
input.
The AAT1201 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 & 2.5-V output. The device is
equipped with an incorporated reverse-blocking
scheme to prevent excess leakage from the input
terminals in the event when the output voltage is
greater than the input voltage.
The input voltage is prioritized in the following
order: VCC50, VSB50, AUX33.
––
Advanced Analog Technology, Inc.
Page 1 of 21
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AAT1201 pdf, 반도체, 판매, 대치품
Advanced Analog Technology, Inc.
AAT1201
Electrical Characteristics Over Recommended Operating Free-Air Temperature, TC =
0 to 70 , CL = 4.7µF (unless otherwise specified)
Parameter
Symbol
Test Condition
Min Typ Max Unit
5V Inputs
VCC50
VSB50
4.5 5.0 5.5 V
3.3V Output
OUT33
Iout33 + Iout25 = 250mA
3.135 3.300 3.465 V
2.5V Output
OUT25
Iout33 =0, Iout25 = 200mA
2.375 2.500 2.625 V
Line Regulation Voltage
VO(VI) VSB50 or VCC50 = 4.5V to 5.5V
-
2
- mV
Load Regulation Voltage
VO(IO)
20 mA IL 250 mA
- 40 - mV
Quiescent Supply Current
I 50
From VCC50 VSB50 Terminals,
IL = 0 to 250mA
- 1.0 3.0 mA
IAUX From AUX33 Terminal, IL = 0A - 1.0 3.0 mA
Out33 Load Current
I L33
0.25 -
-
Out25 Load Current
Output Current Limit
I L25
I LIMIT
Out33 or Out25 Output Shortened to
0V
0.2
-
-
-
-A
1.5
Thermal Shutdown
(Note 2)
Thermal Hysteresis
(Note 2)
TTSD
Thys
150 - 180
- 15 -
Load Capacitance
CL
Minimal ESR to Insure Stability of
Regulated Output
-
4.7
- µF
Reverse Leakage Output
Current
IIkg(REV )
Tested for Grounded Input
AUX33, VSB50 or VCC50 = GND,
Out33 = 3.3V
-
- 50 µA
Threshold Voltage, Low
VLO VSB50 or VCC50
3.85 4.05 4.25
V
Threshold Voltage, High
Auxiliary Switch
Resistance
Thermal Impedance,
Junction-to-Ambient
(Note 3)
VHI
R SWITCH
VSB50 or VCC50
VSB50 = VCC50 = 0V,
AUX33 = 3.3V, IL = 150mA
4.1 4.3 4.5 V
- - 0.4
Without Copper for Heat Spreading
-
100
-
R θJA
With Copper for Heat Spreading
- 70 -
/W
Note 2 Design targets only. Not tested in production.
Note 3 Please refer to "Thermal Information"
––
Advanced Analog Technology, Inc.
Page 4 of 21
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AAT1201 전자부품, 판매, 대치품
Advanced Analog Technology, Inc.
Typical Characteristics
AAT1201
Fig. 3. 3.3V AUX33 Cold Start
Fig. 4. 2.5V AUX33 Cold Start
––
Advanced Analog Technology, Inc.
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