View AAT1201_265048.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Advanced Analog Technology, Inc.
AAT1201
Details are subject to 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 or VSB50 or AUX33 Input Source Integrated Low rDS(on ) Switch Dual Regulated Output 3.3V (fixed) & 2.5V (fixed) Output Short Circuit Protection (SCP) Pin Configuration
TOP VIEW
VSB50 VCC50 OUT33 AUX33 1 2 3 4 8 7 6 5 GND GND EN25 OUT25
Description The AAT1201 is a multi-input low-dropout regulator (LDO) designed for LAN card. It provides dual constant output supply 3.3V & 2.5V at the output capable of driving a 250-mA load. The output (OUT25) can be disabled by connecting EN25 pin to GND. The AAT1201 provides 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 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.
( 8-PIN SOP )
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 1 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Function Table
INPUT VOLTAGE STATUS (V)
Hi Lo Hi Lo Hi Lo Hi Lo Hi Lo Hi Lo Hi Lo Hi Lo 0 0 0 0 0 0 0 0 5 5 5 5 5 5 5.0 5.0 0 0 0 0 5 5 5.0 5.0 0 0 0 0 5 5 5.0 5.0 0 0 3.3 3.3 0 0 3.3 3.3 0 0 3.3 3.3 0 0 3.3 3.3
INPUT SELECTED
None None AUX33 AUX33 VSB50 VSB50 VSB50 VSB50 VCC50 VCC50 VCC50 VCC50 VCC50 VCC50 VCC50 VCC50
OUTPUT]
OUT33
0 0 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3
V^ ]
OUT25
0 0 2.5 0 2.5 0 2.5 0 2.5 0 2.5 0 2.5 0 2.5 0
OUTPUT I^] mA^
Iout33+Iout25
0 0 250 250 250 250 250 250 250 250 250 250 250 250 250 250
EN25 VCC50 VSB50 AUX33 VCC50/VSB50/AUX33
Pin Description
TERMINAL TERMINAL NAME NO.
VSB50 VCC50 OUT33 AUX33 OUT25 EN25 GND GND 1 2 3 4 5 6 7 8
I/O
I I O I O I I I
Description
5V Standby Supply Input 5V Main Supply Input 3.3V Regulated Output 3.3V Auxiliary Supply Input 2.5V Regulated Output Enable Input of OUT25 Ground Ground
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 2 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Absolute Maximum Ratings
* Main Supply Voltage, V(VCC50 ) .............................................................. - 0.5 V~7V * Standby Supply Voltage, V(VSB50 ) ............................................................ - 0.5 V~7V * Auxiliary Supply Voltage, V(AUX33) .......................................................... - 0.5 ~7V * Output Current Limit, I (LIMIT ) ................................................................1.5A * Continuous Power Dissipation, Pd ] see Note 1^ ...................................... 1.1W * Electrostatic Discharge Susceptibility, Human Body Mode..............................2kV * Operating Free-Air Temperature Range, TC ..............................................0J to +70J * Storage Temperature Range, Tstorage ....................................................... - 45 J to +125J * Operating Junction Temperature Range, TJ ............................................... - 5 J to +130J * Lead Temperature] Soldering for 10 seconds^ , T(LEAD) ..............................260J
Note 1G The device deteriorates with increase in ambient temperature, TC . See Thermal Information section.
Recommended Operating Conditions
Parameter 5V Main Supply Input, VCC50 5V Standby Supply Input, VSB50 3.3V Auxiliary Supply Input, AUX33 Load Capacitance, C L Load Current, I L Operating Free-Air Temperature, TC Min 4.5 4.5 3.0 Typ Max 5.5 5.5 3.6 Unit V V V
4.23 4.70 5.17 0 250 0 70
F mA
J
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 3 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Electrical Characteristics Over Recommended Operating Free-Air Temperature, TC = 0 to 70 , C L = 4.7F (unless otherwise specified) J J
Parameter
5V Inputs 3.3V Output 2.5V Output Line Regulation Voltage
Load Regulation Voltage Quiescent Supply Current
Symbol
VCC50 VSB50 OUT33 OUT25 VO (VI )
VO (IO ) I 50 I AUX I L33 I L 25 I LIMIT TTSD Thys CL I Ikg (REV ) VLO VHI R SWITCH R JA
Test Condition
Min
4.5
Typ
5.0 3.300 2.500
2 40 1.0 1.0 15 4.7 4.05 4.3 100 70
Max
5.5 3.465 2.625
3.0 3.0 1.5 180
Unit
V V V
mV mV mA mA
I out 33 + I out 25 = 250mA I out 33 =0, I out 25 = 200mA
VSB50 or VCC50 = 4.5V to 5.5V 20 mAO ILO 250 mA From VCC50 VSB50 Terminals, I L = 0 to 250mA From AUX33 Terminal, I L = 0A
3.135 2.375
0.25 0.2
Out33 Load Current Out25 Load Current Output Current Limit Thermal Shutdown
(Note 2)
Out33 or Out25 Output Shortened to 0V
A
150 -
Thermal Hysteresis (Note 2) Load Capacitance Reverse Leakage Output Current Threshold Voltage, Low Threshold Voltage, High Auxiliary Switch Resistance Thermal Impedance, Junction-to-Ambient (Note 3)
J
50 4.25 4.5 0.4 J /W
Minimal ESR to Insure Stability of Regulated 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, I L = 150mA Without Copper for Heat Spreading With Copper for Heat Spreading
3.85 4.1 -
F A V V
Note 2G Design targets only. Not tested in production. Note 3G Please refer to "Thermal Information"
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 4 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Block Diagram
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 5 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Typical Characteristics
Fig. 1. 3.3V VCC50 Cold Start
Fig. 2. 2.5V VCC50 Cold Start
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 6 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Typical Characteristics
Fig. 3. 3.3V AUX33 Cold Start
Fig. 4. 2.5V AUX33 Cold Start
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 7 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Typical Characteristics
Fig. 5. 3.3V VCC50 Power Up (VSB50=5V)
Fig. 6.
2.5V VCC50 Power Up (VSB50=5V)
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 8 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Typical Characteristics
Fig. 7. 3.3V VCC50 Power Up (AUX33=3.3V)
Fig. 8. 2.5V VCC50 Power Up (AUX33=3.3V)
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 9 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Typical Characteristics
Fig. 9. 3.3V VSB50 Power Up (AUX33=3.3V)
Fig. 10. 2.5V VSB50 Power Up (AUX33=3.3V)
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 10 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Typical Characteristics
Fig. 11. 3.3V VCC50 Power Down (VSB=5V)
Fig. 12. 2.5V VCC50 Power Down (VSB=5V)
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 11 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Typical Characteristics
Fig. 13. 3.3V VCC50 Power Down (AUX33=3.3V)
Fig. 14. 2.5V VCC50 Power Down (AUX33=3.3V)
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 12 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Typical Characteristics
Fig.
15.
3.3V Load Transient Response Falling.
Fig. 16.
2.5V Load Transient Response Falling.
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 13 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Typical Characteristics
Fig.
17.
3.3V Load Transient Response Rising
Fig.
18.
2.5V Load Transient Response Rising
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 14 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Thermal Information
To ensure reliable operation of the device, the junction temperature of the output device must be within the safe operating area] SOA^ . This is achieved by having a means to dissipate the heat generated from the junction of the output structure. There are two components that contribute to thermal resistance. They consist of two paths in series. The first path is the junction to case thermal resistance, RJC; the second path is the case to ambient thermal resistance, RCA. The overall junction to ambient thermal resistance, RJA, is determined byG RJAx RJCI RCA Package style and board layout incorporated in the application determines the ability to efficiently dissipate the heat from the junction. The operating junction temperature is determined by the operation ambient temperature, TC, and the junction power dissipation, PJ. The junction temperature, TJ, is equal to the following thermal equationG PJ] RCA^ TJx TCI PJ] RJC^I TJx TCI PJ] RJA^ This particular application uses the 8-pin SO package with standard lead frame with a dedicated ground terminal. Hence, the maximum power dissipation allowable for an operating ambient temperature of 70J , and a maximum junction temperature of 150J is determined asG PJx] PJx] TJ TC^ / RJA 150 70^ /70x 1.1W
Worst case maximum power dissipation is determined byG Pdx] 5.5 2.375^ x0.25x 0.781W
Normal operating maximum power dissipation isG Pdx] 5 2.5^ x0.25x 0.625W
Note: The thermal characteristics of the AAT1201 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.
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 15 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Thermal Information
1.78
Power-W
0.781 0.625
25
95
106
150
Ambient Temperature - X C
NOTE: These curves are to be used for guideline purposes only. F or a particular application, a more specijic thermal characterizis required. ation
Power Dissipation Derating Curves
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 16 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Application Information
1 VSB50 4.7g F 0.1g F 2 4.7g F 0.1g F 3 4.7g F 4 4.7g F 0.1g F VCC50 GND GND
8
7
3.3V
AAT1201
OUT33 EN25
6
to OUT33 or Floating 2.5V 4.7g F
5 AUX33 OUT25
Typical Application Schematic - Dual Output
1 4.7g F 0.1g F 2 4.7g F 0.1g F 3 3.3V 4.7g F 4 4.7g F 0.1g F
VSB50
GND
8
GND or FLOATIN
VCC50
GND
7
AAT1201
OUT33 EN25
6 GND
AUX33
OUT25
5
GND or FLOATIN
Typical Application Schematic - Only OUT33 Used
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 17 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Package Dimension
8-Pin SOP
SYMBOLS A A1 A2 b C D E E1 e L y
DIMENSIONS IN MILLIMETERS MIN 1.47 0.10 --0.33 0.19 4.80 5.80 3.80 --0.38 --0 TYP 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 0
DEMINSIONS IN INCHES MIN 0.058 0.004 --0.013 0.0075 0.189 0.228 0.150 --0.015 --0 TYP 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 0 0
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 18 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Tape and Reel
8-Pin SOP
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 19 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Tape and Reel
8-Pin SOP (Cont.)
NOTE: 1. 10 SPROCKET HOLE PITCH CUMULATIVE TOLERANCE 0.2 MILLIMETERS. 2. CAMBER NOT TO EXCEED 1 MILLIMETER IN 100 MILLIMETERS 3. MATERIAL: ANTI-STATIC BLACK ADVANTEK POLYSTYRENE. 4. A 0 AND B 0 ARE MEASURED ON A PLANE 0.3 MILLIMETERS ABOVE THE BOTTOM OF THE POCKET. 5. 6.
K 0 IS MEASURED FROM A PLANE ON THE INSIDE BOTTOM OF THE POCKET TO THE TOP SURFACE OF
THE CARRIER. POCKET POSITION RELATIVE TO SPROCKET HOLE IS MEASURED AS TRUE POSITION OF POCKET, NOT POCKET HOLE.
Part Marking
SOP8 Top Marking
AAT1201 XXXXXX
SOP8 Back Marking
YYWW
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 20 of 21 V 1.0
Advanced Analog Technology, Inc.
AAT1201
Ordering Information
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 21 of 21 V 1.0

▲Up To Search▲

Price & Availability of AAT1201

	To Download AAT1201 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .