ST1534A 500mA SMART LDO ■ ■ ■ ■ ■ ■ ■ ■ ■ 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 0°C TO 85°C AVAILABLE IN P2PAK PACKAGE PPAK AND SO-8 PACKAGES CAN BE AVAILABLE ON REQUEST APPLICATIONS ■ ■ ■ ■ 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 P2PAK PPAK SO-8 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 VIN + DR 5V Detect Rpull_down VIN Reference + Error Amp - VOUT GND April 2003 1/15 ST1534A ABSOLUTE MAXIMUM RATINGS Symbol Parameter² VI VSHDN Value Unit DC Input Voltage -0.3 to 7 V Shutdown Input Voltage -0.3 to 7 V Internally limited mA -40 to +125 °C 0 to +85 °C Output Current IO Tstg Storage Temperature Range Top Operating Junction Temperature Range 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 Parameter Rthj-case Thermal Resistance Junction-case Rthj-amb Thermal Resistance Junction-ambient PPAK P2PAK SO-8 Unit 8 3 20 °C/W 100 50 55 °C/W CONNECTION DIAGRAM (top view) PPAK P2PAK SO-8 PIN DESCRIPTION Pin PPAK/P2PAK Pin SO/8 Symbol 1 2 3 4 5 1 2 5, 6, 7, 8 3 4 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 PPAK (*) P2PAK (#) SO-8 (*) ST1534A ST1534APT ST1534AP2T ST1534AD (*) PPAK and SO-8 are available in Tape & Reel with the suffix "-TR". (#) P2PAK is available in Tape & Reel with the suffix "-R". 2/15 ST1534A TYPICAL APPLICATION CIRCUIT 3.3V AUX DR 0.1 µF 5V IN 4.7 µF GND Vout=3.3V OUT 0.1 µF 0.1 µF 10 µF ELECTRICAL CHARACTERISTICS (Tj = 25°C, VI=5V, VAUX=3.3V, IO=10mA, CO = 2.2µF, unless otherwise specified) Symbol Parameter VI Input Voltage Range IIN Input Supply Current IAUX Auxliary Supply Current Test Conditions Min. 4.5 Typ. Max. 5 5.5 Unit V VI ≥ 4.5V IO = 0mA VAUX = 0V 11 mA VI ≥ 4.5V IO = 0mA VAUX = 3.3V 11 mA VI < 4.1V IO = 0mA VAUX = 0V 2 mA VI < 4.1V IO = 0mA VAUX = 3.3V 2 mA VI = 0 V 2.2 mA VI = 5V 200 µA 3.3V VOLTAGE REGULATOR BLOCK VO Output Voltage Tj = 0 to 85 °C 3.18 3.3 3.42 V ∆VO Line Regulation VI = 4.5 to 5.5V 0.04 0.5 % ∆VO Load Regulation IO = 0 to 500mA 0.1 1 % Vd Dropout Voltage IO Output Current Limit IO = 500 mA Tj = 0 to 85 °C Tj = 0 to 85 °C 550 VI falling, 4.15 4.3 V 70 200 mV 5V DETECT BLOCK VTHL Low Threshold Voltage VHYST IO = 500 mA Tj = 0 to 85 °C Hysteresis DRIVE OUTPUT BLOCK VDR Drive Output Voltage VI = 4.5 to 5.5V IDR = 200 µA VI < 4.15V IDR = 200 µA 1.15 3.6 V mA VIN-0.8 100 Sinking: VI = 4.15V VDR = 1V 7 20 Sourcing: VI = 4.5V VI - VDR = 2V 7 25 V 200 mV IDR Drive Current mA tDH Drive High Delay (Note 1 and 2) CDR = 1.2nF, VIN ramping up, measured from VI = VTH(H) to VDR = 3.3V Tj = 0 to 85 °C 2 5 µs tDL Drive Low Delay (Note 1 and 2) CDR = 1.2nF, VIN ramping down, measured from VI = VTH(L) to VDR = 200mV Tj = 0 to 85 °C 3 6 µs mA Note 1: Guaranteed by design Note 2: See timing diagram 3/15 ST1534A 5V DETECT THRESHOLDS VIN rise and fall times (10% to 90%) to be > 100µs TIMING DIAGRAM VIN rise and fall times (10% to 90%) to be > 100µs 4/15 ST1534A TYPICAL CHARACTERISTICS (unless otherwise specified Tj = 25°C) 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 5/15 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 6/15 ST1534A Figure 13 : Hysteresis vs Temperature Figure 16 : Threshold VI=3.5 to 4.5V, ts=tf>100µs, No Load CI=0.1+4.7µF, CO=33+0.1µF Figure 14 : Threshold Figure 17 : Glitch VI=3.5 to 4.5V, ts=tf>100µs, IO=500mA, CI=0.1+4.7µF, CO=33+0.1µF VI=3.5 to 5V, IO=500mA, CO=33+0.1µF, with P-Channel Figure 15 : Glitch Figure 18 : Line Transient VI=3.5 to 5V, IO=500mA, CO=33+0.1µF, with P-Channel VI=4.5 to 5.5V, IO=10mA, CI=0.1+4.7µF, CO=33+0.1µF, CAUX=0.1µF, 7/15 ST1534A Figure 19 : Load Transient VI=5 V, I O=0 to 500mA, CI=4.7+0.1µF, CO=0.1+33µF, CAUX=0.1µF 8/15 ST1534A PPAK MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 2.2 2.4 0.086 0.094 A1 0.9 1.1 0.035 0.043 A2 0.03 0.23 0.001 0.009 B 0.4 0.6 0.015 0.023 B2 5.2 5.4 0.204 0.212 C 0.45 0.6 0.017 0.023 C2 0.48 0.6 0.019 0.023 D 6 6.2 0.236 0.244 E 6.4 6.6 0.252 0.260 G 4.9 5.25 0.193 0.206 G1 2.38 2.7 0.093 0.106 H 9.35 10.1 0.368 0.397 L2 L4 0.8 0.6 0.031 1 0.023 0.039 0078180-B 9/15 ST1534A P2PAK/A MECHANICAL DATA mm. inch DIM. MAX. MIN. A MIN. 4.30 4.80 0.169 0.188 A2 0.03 0.23 0.001 0.009 C 1.17 1.37 0.046 0.053 D 2.40 2.80 0.094 0.110 D1 8.95 9.35 0.352 0.368 E 0.45 0.60 0.017 0.023 F 0.80 1.05 0.031 0.041 G 3.20 3.60 0.126 0.142 G1 6.60 7.00 0.260 0.275 H1 TYP 8.5 TYP. 0.334 MAX. 0.409 H2 10.00 10.40 0.393 0.409 L 15 15.85 0.590 0.624 L1 8 0.315 L2 1.27 1.40 0.050 0.055 M 2.4 3.2 0.094 0.126 R V2 0.40 0˚ 0.016 8˚ 0˚ 8˚ 7157127/A 10/15 ST1534A SO-8 MECHANICAL DATA DIM. mm. MIN. TYP inch MAX. MIN. TYP. MAX. A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.04 0.010 A2 1.10 1.65 0.043 0.065 B 0.33 0.51 0.013 0.020 C 0.19 0.25 0.007 0.010 D 4.80 5.00 0.189 0.197 E 3.80 4.00 0.150 0.157 e 1.27 0.050 H 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 k ddd 8˚ (max.) 0.1 0.04 0016023/C 11/15 ST1534A Tape & Reel DPAK-PPAK MECHANICAL DATA mm. inch DIM. MIN. TYP A MIN. TYP. 180 13.0 13.2 MAX. 7.086 C 12.8 D 20.2 0.795 N 60 2.362 T 12/15 MAX. 0.504 0.512 14.4 0.519 0.567 Ao 6.80 6.90 7.00 0.268 0.272 0.2.76 Bo 10.40 10.50 10.60 0.409 0.413 0.417 Ko 2.55 2.65 2.75 0.100 0.104 0.105 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 7.9 8.0 8.1 0.311 0.315 0.319 ST1534A Tape & Reel D2PAK-P 2PAK-D 2PAK/A-P 2PAK/A MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. 180 13.0 7.086 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 MAX. 0.504 0.512 14.4 0.519 0.567 Ao 10.50 10.6 10.70 0.413 0.417 0.421 Bo 15.70 15.80 15.90 0.618 0.622 0.626 Ko 4.80 4.90 5.00 0.189 0.193 0.197 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 11.9 12.0 12.1 0.468 0.472 0.476 13/15 ST1534A Tape & Reel SO-8 MECHANICAL DATA mm. inch DIM. MIN. A MAX. MIN. 330 13.2 TYP. MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 14/15 TYP 0.504 22.4 0.519 0.882 Ao 8.1 8.5 0.319 0.335 Bo 5.5 5.9 0.216 0.232 Ko 2.1 2.3 0.082 0.090 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319 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. © The ST logo is a registered trademark of STMicroelectronics © 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. © http://www.st.com 15/15