Details subject change without notice 250-mA MULTI-INPUT LOW-DROP

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Details subject change without notice 250-mA MULTI-INPUT LOW-DROP

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AAT1201
Details subject change without notice
250-mA MULTI-INPUT LOW-DROPOUT REGULATOR WITH DUAL-OUTPUT POWER MANAGEMENT
Features Complete Power Management Automatic Input Voltage Selection Input Voltage Source Detector with Hysteresis 250-mA Load Current Capability with VCC50 VSB50 AUX33 Input Source Integrated rDS(on Switch Dual Regulated Output 3.3V (fixed) 2.5V (fixed) Output Short Circuit Protection (SCP) Configuration Description AAT1201 multi-input low-dropout regulator (LDO) designed card. provides dual constant output supply 3.3V 2.5V output capable driving 250-mA load. output (OUT25) disabled connecting EN25 GND. AAT1201 provides dual regulated power output systems with multiple input sources require dual constant voltage source with low-dropout voltage. This intelligent power source selection device with regulator either VCC50 VSB50 inputs, low-resistance bypass switch AUX33 input. AAT1201 allows transitions progress smoothly from input supply another without generating glitch outside specified range 3.3-V 2.5-V output. device equipped with incorporated reverse-blocking scheme prevent excess leakage from input terminals event when output voltage greater than input voltage. input voltage prioritized following order: VCC50, VSB50, AUX33.
VIEW
VSB50 VCC50 OUT33 AUX33 EN25 OUT25
8-PIN
Advanced Analog Technology, Inc.
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AAT1201
Function Table
INPUT VOLTAGE STATUS
INPUT SELECTED
None None AUX33 AUX33 VSB50 VSB50 VSB50 VSB50 VCC50 VCC50 VCC50 VCC50 VCC50 VCC50 VCC50 VCC50
OUTPUTV
OUT33
OUTPUT
Iout33+Iout25
EN25 VCC50 VSB50 AUX33 VCC50/VSB50/AUX33
OUT25
Description
TERMINAL TERMINAL NAME
VSB50 VCC50 OUT33 AUX33 OUT25 EN25
Description
Standby Supply Input Main Supply Input 3.3V Regulated Output 3.3V Auxiliary Supply Input 2.5V Regulated Output Enable Input OUT25 Ground Ground
Advanced Analog Technology, Inc.
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AAT1201
Absolute Maximum Ratings
Main Supply Voltage, V(VCC50 V~7V Standby Supply Voltage, V(VSB50 V~7V Auxiliary Supply Voltage, V(AUX33) Output Current Limit, (LIMIT .1.5A Continuous Power Dissipation, Note 1.1W Electrostatic Discharge Susceptibility, Human Body Mode.2kV Operating Free-Air Temperature Range, Storage Temperature Range, Tstorage +125 Operating Junction Temperature Range, +130 Lead TemperatureSoldering seconds, T(LEAD) .260
Note 1The device deteriorates with increase ambient temperature, Thermal Information section.
Recommended Operating Conditions
Parameter Main Supply Input, VCC50 Standby Supply Input, VSB50 3.3V Auxiliary Supply Input, AUX33 Load Capacitance, Load Current, Operating Free-Air Temperature, Unit
4.23 4.70 5.17
Advanced Analog Technology, Inc.
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AAT1201
Electrical Characteristics Over Recommended Operating Free-Air Temperature, 4.7µF (unless otherwise specified)
Parameter
Inputs 3.3V Output 2.5V Output Line Regulation Voltage
Load Regulation Voltage Quiescent Supply Current
Symbol
VCC50 VSB50 OUT33 OUT25
LIMIT TTSD Thys (REV SWITCH
Test Condition
3.300 2.500
4.05
3.465 2.625
Unit
250mA 200mA
VSB50 VCC50 4.5V 5.5V mAIL250 From VCC50 VSB50 Terminals, 250mA From AUX33 Terminal,
3.135 2.375
0.25
Out33 Load Current Out25 Load Current Output Current Limit Thermal Shutdown
(Note
Out33 Out25 Output Shortened
Thermal Hysteresis (Note Load Capacitance Reverse Leakage Output Current Threshold Voltage, Threshold Voltage, High Auxiliary Switch Resistance Thermal Impedance, Junction-to-Ambient (Note
4.25
Minimal Insure Stability Regulated Output Tested Grounded Input AUX33, VSB50 VCC50 GND, Out33 3.3V VSB50 VCC50 VSB50 VCC50 VSB50 VCC50 AUX33 3.3V, 150mA Without Copper Heat Spreading With Copper Heat Spreading
3.85
Note 2Design targets only. tested production. Note 3Please refer "Thermal Information"
Advanced Analog Technology, Inc.
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AAT1201
Block Diagram
Advanced Analog Technology, Inc.
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AAT1201
Typical Characteristics
Fig. 3.3V VCC50 Cold Start
Fig. 2.5V VCC50 Cold Start
Advanced Analog Technology, Inc.
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AAT1201
Typical Characteristics
Fig. 3.3V AUX33 Cold Start
Fig. 2.5V AUX33 Cold Start
Advanced Analog Technology, Inc.
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AAT1201
Typical Characteristics
Fig. 3.3V VCC50 Power (VSB50=5V)
Fig.
2.5V VCC50 Power (VSB50=5V)
Advanced Analog Technology, Inc.
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AAT1201
Typical Characteristics
Fig. 3.3V VCC50 Power (AUX33=3.3V)
Fig. 2.5V VCC50 Power (AUX33=3.3V)
Advanced Analog Technology, Inc.
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AAT1201
Typical Characteristics
Fig. 3.3V VSB50 Power (AUX33=3.3V)
Fig. 2.5V VSB50 Power (AUX33=3.3V)
Advanced Analog Technology, Inc.
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AAT1201
Typical Characteristics
Fig. 3.3V VCC50 Power Down (VSB=5V)
Fig. 2.5V VCC50 Power Down (VSB=5V)
Advanced Analog Technology, Inc.
Page
AAT1201
Typical Characteristics
Fig. 3.3V VCC50 Power Down (AUX33=3.3V)
Fig. 2.5V VCC50 Power Down (AUX33=3.3V)
Advanced Analog Technology, Inc.
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AAT1201
Typical Characteristics
Fig.
3.3V Load Transient Response Falling.
Fig.
2.5V Load Transient Response Falling.
Advanced Analog Technology, Inc.
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AAT1201
Typical Characteristics
Fig.
3.3V Load Transient Response Rising
Fig.
2.5V Load Transient Response Rising
Advanced Analog Technology, Inc.
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AAT1201
Thermal Information
ensure reliable operation device, junction temperature output device must within safe operating areaSOA. This achieved having means dissipate heat generated from junction output structure. There components that contribute thermal resistance. They consist paths series. first path junction case thermal resistance, RJC; second path case ambient thermal resistance, RCA. overall junction ambient thermal resistance, RJA, determined RJARJCRCA Package style board layout incorporated application determines ability efficiently dissipate heat from junction. operating junction temperature determined operation ambient temperature, junction power dissipation, junction temperature, equal following thermal equation TJTCPJRJCPJRCA TJTCPJRJA This particular application uses 8-pin package with standard lead frame with dedicated ground terminal. Hence, maximum power dissipation allowable operating ambient temperature maximum junction temperature determined PJTJTC/ PJ15070/701.1W Worst case maximum power dissipation determined Normal operating maximum power dissipation
Note: thermal characteristics AAT1201 were measured using double-sided board with square inches copper area connected pins "heat spreading". multi-layer board construction with power planes will further enhance thermal performance package.
Advanced Analog Technology, Inc.
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AAT1201
Thermal Information
1.78
Power-W
0.781 0.625
Ambient Temperature
NOTE: These curves used guideline purposes only. particular application, more specijic thermal characterization required.
Power Dissipation Derating Curves
Advanced Analog Technology, Inc.
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AAT1201
Application Information
VSB50 VCC50
3.3V
AAT1201
OUT33 EN25
OUT33 Floating 2.5V
AUX33 OUT25
Typical Application Schematic Dual Output
4.7F 0.1F 4.7F 0.1F 3.3V 4.7F 4.7F 0.1F
VSB50
FLOATIN
VCC50
AAT1201
OUT33 EN25
AUX33
OUT25
FLOATIN
Typical Application Schematic Only OUT33 Used
Advanced Analog Technology, Inc.
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AAT1201
Package Dimension
8-Pin
SYMBOLS
DIMENSIONS MILLIMETERS 1.47 0.10 -0.33 0.19 4.80 5.80 3.80 -0.38 1.60 -1.45 0.41 0.20 4.85 6.00 3.90 1.27 0.71 -MAX 1.73 0.22 -0.51 0.25 4.95 6.20 4.00 -1.27 0.076
DEMINSIONS INCHES 0.058 0.004 -0.013 0.0075 0.189 0.228 0.150 -0.015 0.063 -0.057 0.016 0.008 0.191 0.236 0.154 0.050 0.028 -MAX 0.068 0.008 -0.020 0.0098 0.195 0.244 0.157 -0.050
Advanced Analog Technology, Inc.
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AAT1201
Tape Reel
8-Pin
Advanced Analog Technology, Inc.
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AAT1201
Tape Reel
8-Pin (Cont.)
NOTE: SPROCKET HOLE PITCH CUMULATIVE TOLERANCE MILLIMETERS. CAMBER EXCEED MILLIMETER MILLIMETERS MATERIAL: ANTI-STATIC BLACK ADVANTEK POLYSTYRENE. MEASURED PLANE MILLIMETERS ABOVE BOTTOM POCKET.
MEASURED FROM PLANE INSIDE BOTTOM POCKET SURFACE
CARRIER. POCKET POSITION RELATIVE SPROCKET HOLE MEASURED TRUE POSITION POCKET, POCKET HOLE.
Part Marking
SOP8 Marking
AAT1201 XXXXXX
SOP8 Back Marking
YYWW
Advanced Analog Technology, Inc.
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AAT1201
Ordering Information
Advanced Analog Technology, Inc.
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Details subject change without notice 250-mA MULTI-INPUT LOW-DROP

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