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ST1534A
500mA SMART LDO
s
s
s
s s s s
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GLITCH FREE TRANSITION BETWEEN INPUT SOURCES INTERNAL LOGIC SELECTS INPUT SOURCE GATE DRIVE FOR EXTERNAL PMOS BYPASS SWITCH 5V DETECTOR WITH HYSTERESIS 1% 3.3V REGULATED OUTPUT VOLTAGE 500mA GUARANTEED OUTPUT CURRENT OPERATING TEMPERATURE RANGE FROM 0C TO 85C AVAILABLE IN P2PAK PACKAGE PPAK AND SO-8 PACKAGES CAN BE AVAILABLE ON REQUEST
P2PAK
PPAK
SO-8
APPLICATIONS
s s s s
NETWORK INTERFACE CARDS PCMCIA/PCI INTERFACE CARDS DESKTOP COMPUTERS POWER SUPPLY WITH MULTIPLE INPUT SOURCES
DESCRIPTION The ST1534A is intended for application such as power managed PCI and network interface cards (NICs), where operations from 3.3V VAUX supply SCHEMATIC DIAGRAM
VIN
may be required when the 5V supply has been shut down. During regular operation, 3.3V power for the PCI card is provided by the internal LDO regulator, generated from 5V supply. When the 5V VAUX is available, the IC connects this supply directly to its output using an external P-Channel FET. This ensures an uninterrupted 3.3V out even if VIN falls out of specification. When both supplies are available simultaneously, the drive pin DR will be pulled high, turning off the PMOS switch. The device is available in the popular 5 leads P2PAK and PPAK
+
5V Detect
DR
Rpull_down
VIN
Reference
+
-
Error Amp
VOUT GND
April 2003
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ST1534A
ABSOLUTE MAXIMUM RATINGS
Symbol VI VSHDN IO Tstg Top DC Input Voltage Shutdown Input Voltage Output Current Storage Temperature Range Operating Junction Temperature Range Parameter Value -0.3 to 7 -0.3 to 7 Internally limited -40 to +125 0 to +85 Unit V V mA C C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
THERMAL DATA
Symbol Rthj-case Rthj-amb Parameter Thermal Resistance Junction-case Thermal Resistance Junction-ambient PPAK 8 100 P2PAK 3 50 SO-8 20 55 Unit C/W C/W
CONNECTION DIAGRAM (top view)
P2PAK
PPAK
SO-8
PIN DESCRIPTION
Pin PPAK/P2PAK 1 2 3 4 5 Pin SO/8 1 2 5, 6, 7, 8 3 4 Symbol AUX IN GND OUT DR Name and Function Auxiliary Input port typically 3.3V Input port typically 5V Ground LDO 3.3V Output Port Drive Output for external P-Channel MOSFET pass element
ORDERING INFORMATION
TYPE ST1534A PPAK (*) ST1534APT P2PAK (#) ST1534AP2T SO-8 (*) ST1534AD
(*) PPAK and SO-8 are available in Tape & Reel with the suffix "-TR". (#) P2PAK is available in Tape & Reel with the suffix "-R".
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ST1534A
TYPICAL APPLICATION CIRCUIT
3.3V 0.1 F
AUX
DR
5V 4.7 F 0.1 F
IN
GND
OUT 0.1 F 10 F
Vout=3.3V
ELECTRICAL CHARACTERISTICS (Tj = 25C, VI=5V, VAUX=3.3V, IO=10mA, CO = 2.2F, unless otherwise specified)
Symbol VI IIN Parameter Input Voltage Range Input Supply Current VI 4.5V VI 4.5V VI < 4.1V VI < 4.1V IAUX Auxliary Supply Current VI = 0 V VI = 5V 3.3V VOLTAGE REGULATOR BLOCK VO Output Voltage Tj = 0 to 85 C VO VO Vd IO Line Regulation Load Regulation Dropout Voltage Output Current Limit VI = 4.5 to 5.5V IO = 0 to 500mA IO = 500 mA Tj = 0 to 85 C Tj = 0 to 85 C VI falling, IO = 500 mA Tj = 0 to 85 C 550 4.15 70 VI = 4.5 to 5.5V VI < 4.15V IDR tDH Drive Current Drive High Delay (Note 1 and 2) Drive Low Delay (Note 1 and 2) Sinking: VI = 4.15V Sourcing: VI = 4.5V IDR = 200 A IDR = 200 A VDR = 1V VI - VDR = 2V 7 7 3.6 VIN-0.8 100 20 25 2 5 200 4.3 200 3.18 IO = 0mA IO = 0mA IO = 0mA IO = 0mA VAUX = 0V VAUX = 3.3V VAUX = 0V VAUX = 3.3V Test Conditions Min. 4.5 Typ. 5 11 11 2 2 2.2 200 3.3 0.04 0.1 3.42 0.5 1 1.15 Max. 5.5 Unit V mA mA mA mA mA A V % % V mA V mV V mV mA mA s
5V DETECT BLOCK VTHL Low Threshold Voltage VHYST Hysteresis DRIVE OUTPUT BLOCK VDR Drive Output Voltage
CDR = 1.2nF, VIN ramping up, measured from VI = VTH(H) to VDR = 3.3V Tj = 0 to 85 C CDR = 1.2nF, VIN ramping down, measured from VI = VTH(L) to VDR = 200mV Tj = 0 to 85 C
tDL
3
6
s
Note 1: Guaranteed by design Note 2: See timing diagram
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ST1534A
5V DETECT THRESHOLDS
VIN rise and fall times (10% to 90%) to be > 100s
TIMING DIAGRAM
VIN rise and fall times (10% to 90%) to be > 100s
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ST1534A
TYPICAL CHARACTERISTICS (unless otherwise specified Tj = 25C) Figure 1 : Supply Current vs Temperature Figure 4 : Aux Current vs Temperature
Figure 2 : Aux Current vs Temperature
Figure 5 : Drive Output Voltage vs Temperature
Figure 3 : Drive Current vs Temperature
Figure 6 : Drive Current vs VIN-VDR
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ST1534A
Figure 7 : Drive Current vs Temperature Figure 10 : Output Voltage vs Temperature
Figure 8 : Line Regulation vs Temperature
Figure 11 : Load Regulation vs Temperature
Figure 9 : Output Voltage vs Input Voltage
Figure 12 : Threshold Voltage vs Temperature
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ST1534A
Figure 13 : Hysteresis vs Temperature Figure 16 : Threshold
VI=3.5 to 4.5V, ts=tf>100s, No Load CI=0.1+4.7F, CO=33+0.1F
Figure 14 : Threshold
Figure 17 : Glitch
VI=3.5 to 4.5V, ts=tf>100s, IO=500mA, CI=0.1+4.7F, CO=33+0.1F
VI=3.5 to 5V, IO=500mA, CO=33+0.1F, with P-Channel
Figure 15 : Glitch
Figure 18 : Line Transient
VI=3.5 to 5V, IO=500mA, CO=33+0.1F, with P-Channel
VI=4.5 to 5.5V, IO=10mA, CI=0.1+4.7F, CO=33+0.1F, CAUX=0.1F,
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ST1534A
Figure 19 : Load Transient
VI=5 V, I O=0 to 500mA, CI=4.7+0.1F, CO=0.1+33F, CAUX=0.1F
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ST1534A
PPAK MECHANICAL DATA
mm. DIM. MIN. A A1 A2 B B2 C C2 D E G G1 H L2 L4 0.6 2.2 0.9 0.03 0.4 5.2 0.45 0.48 6 6.4 4.9 2.38 9.35 0.8 1 0.023 TYP MAX. 2.4 1.1 0.23 0.6 5.4 0.6 0.6 6.2 6.6 5.25 2.7 10.1 MIN. 0.086 0.035 0.001 0.015 0.204 0.017 0.019 0.236 0.252 0.193 0.093 0.368 0.031 0.039 TYP. MAX. 0.094 0.043 0.009 0.023 0.212 0.023 0.023 0.244 0.260 0.206 0.106 0.397 inch
0078180-B
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ST1534A
P2PAK/A MECHANICAL DATA
mm. DIM. MIN. A A2 C D D1 E F G G1 H1 H2 L L1 L2 M R V2 0 1.27 2.4 0.40 8 0 10.00 15 8 1.40 3.2 0.050 0.094 0.016 8 4.30 0.03 1.17 2.40 8.95 0.45 0.80 3.20 6.60 8.5 10.40 15.85 0.393 0.590 0.315 0.055 0.126 TYP MAX. 4.80 0.23 1.37 2.80 9.35 0.60 1.05 3.60 7.00 MIN. 0.169 0.001 0.046 0.094 0.352 0.017 0.031 0.126 0.260 0.334 TYP. MAX. 0.188 0.009 0.053 0.110 0.368 0.023 0.041 0.142 0.275 0.409 0.409 0.624 inch
7157127/A
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ST1534A
SO-8 MECHANICAL DATA
DIM. A A1 A2 B C D E e H h L k ddd 0.1 5.80 0.25 0.40 mm. MIN. 1.35 0.10 1.10 0.33 0.19 4.80 3.80 1.27 6.20 0.50 1.27 8 (max.) 0.04 0.228 0.010 0.016 TYP MAX. 1.75 0.25 1.65 0.51 0.25 5.00 4.00 MIN. 0.053 0.04 0.043 0.013 0.007 0.189 0.150 0.050 0.244 0.020 0.050 inch TYP. MAX. 0.069 0.010 0.065 0.020 0.010 0.197 0.157
0016023/C
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ST1534A
Tape & Reel DPAK-PPAK MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.80 10.40 2.55 3.9 7.9 6.90 10.50 2.65 4.0 8.0 12.8 20.2 60 14.4 7.00 10.60 2.75 4.1 8.1 0.268 0.409 0.100 0.153 0.311 0.272 0.413 0.104 0.157 0.315 13.0 TYP MAX. 180 13.2 0.504 0.795 2.362 0.567 0.2.76 0.417 0.105 0.161 0.319 0.512 MIN. TYP. MAX. 7.086 0.519 inch
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ST1534A
Tape & Reel D2PAK-P 2PAK-D 2PAK/A-P 2PAK/A MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 10.50 15.70 4.80 3.9 11.9 10.6 15.80 4.90 4.0 12.0 12.8 20.2 60 14.4 10.70 15.90 5.00 4.1 12.1 0.413 0.618 0.189 0.153 0.468 0.417 0.622 0.193 0.157 0.472 13.0 TYP MAX. 180 13.2 0.504 0.795 2.362 0.567 0.421 0.626 0.197 0.161 0.476 0.512 MIN. TYP. MAX. 7.086 0.519 inch
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ST1534A
Tape & Reel SO-8 MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 8.1 5.5 2.1 3.9 7.9 12.8 20.2 60 22.4 8.5 5.9 2.3 4.1 8.1 0.319 0.216 0.082 0.153 0.311 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.335 0.232 0.090 0.161 0.319 MIN. TYP. MAX. 12.992 0.519 inch
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ST1534A
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. (c) The ST logo is a registered trademark of STMicroelectronics (c) 2003 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. (c) http://www.st.com
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