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| ST2052 CURRENT LIMITED POWER DISTRIBUTION SWITCHES I I I I I I I I I I I 80m HIGH-SIDE MOSFET SWITCH 500mA CONTINUOUS CURRENT PER CHANNEL INDEPENDENT THERMAL AND SHORT-CIRCUIT PROTECTION WITH OVERCURRENT LOGIC OUTPUT OPERATING RANGE FROM 2.7V TO 5.5V CMOS- AND TTL-COMPATIBLE ENABLE INPUTS 10 ms OC_N FAULT BLANKING 2.5ms TYPICAL RISE TIME UNDERVOLTAGE LOCKOUT 10A MAXIMUM STANDBY SUPPLY CURRENT AMBIENT TEMPERATURE RANGE, 0C TO 85C ESD PROTECTION SOP DESCRIPTION The ST2052 power distribution switches is intended for application where heavy capacitive loads and short circuits are likely to be encountered. These devices incorporate 80m N-channel MOSFET high-side power switches for power-distribution systems that require multiple powers switches in a single package. Each switch is controlled by an independent logic enable input. Gate drive is provided by an internal charge pump designed to control the power-switch rise times and fall times to minimize current surges during switching. The charge pump requires no external Table 1: Order Codes Type ST2052BD ST2052BDR Temperature Range -40 to 85 C -40 to 85 C Package components and allows operation from supplies as low as 2.7 V. When the output load exceeds the current-limit threshold or a short is present, these devices limit the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) logic output low. A 10ms deglitching circuit provides fault-blanking feature, preventing the OC_N pin to be asserted during hot-insertion or short spikes of overcurrent conditions. When continuous heavy overloads and short circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. Recovery from a thermal shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures the switch remains off until valid input voltage is present. These power-distribution switches are designed to current limit at 0.9 A Comments 50parts per tube / 40tube per box 2500 parts per reel SO-8 (Tube) SO-8 (Tape & Reel) July 2005 Rev. 2 1/9 ST2052 Figure 1: Pin Configuration Table 2: Pin Description Pln N 1 2 3 4 5 6 7 8 Symbol GND IN EN1 EN2 OC2 OUT2 OUT1 OC1 Name And Function Ground Input Voltage Enable Input. Logic High Turns On Power Switch IN-OUT1 Enable Input. Logic High Turns On Power Switch IN-OUT2 Overcurrent. Logic Output Active Low IN-OUT2 Power Switch Output Power Switch Output Overcurrent. Logic Output Active Low IN-OUT2 Table 3: Absolute Maximum Ratings Symbol VI VO VIENX IO ESD TJ Parameter Input Voltage Range (Note 1) Output Voltage Range (Note 1) Input Voltage Range Continuous Output Current Electrostatic Discharge Operating Junction Temperature Value -0.3 to 6 -0.3 to (VI +0.3) -0.3 to 6 Internally Limited 2 -40 to 125 kV C Unit V V V Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Note1: All voltage are referred to GND Table 4: Recommended Operating Condition Symbol VI VO IO Parameter Input Voltage Range (Note 1) Output Voltage Range (Note 1) Continuous Output Current (Per Switch) Min. 2.7 0 0 Typ. Max. 5.5 5.5 500 Unit V V mA 2/9 ST2052 Figure 2: Block Diagram Table 5: Power Switch Electrical Characteristics (VI = 5.5V, IO = rated current, VIEN =VI, TJ = 25C, unless otherwise specified.) (See Note 1) Symbol Parameter VI =5V VI =5V VI =5V Test Conditions IO = 0.5A IO = 0.5ATJ=85C IO = 0.5ATJ=125C Min. Typ. 80 90 100 90 110 120 2.5 3 0.3 0.2 ms Max. 100 120 135 125 145 160 ms Unit m RDS(ON) Static Drain-Source ON-State Resistance VI =3.3V IO = 0.5A VI =3.3V IO = 0.5ATJ=85C VI =3.3V IO = 0.5ATJ=125C tr tf Output Rise Time Output Fall Time VI =5.5V RL=10 CL=1F VI =2.7V RL=10 CL=1F VI =5.5V RL=10 CL=1F VI =2.7V RL=10 CL=1F 3/9 ST2052 Table 6: Enable Input ENx Characteristics (VI = 5.5V, IO = rated current, VIEN =VI, TJ = 25C, unless otherwise specified.) (See Note 1) Symbol VIH VIL II ton toff Parameter High level Input Voltage Low level Input Voltage Input Current Turn-on Time Turn-off Time Test Conditions VI =2.7V to 5.5V VI =4.5V to 5.5V VI =2.7V to 4.5V VIENX = VI or 0V RL=10 CL=100F RL=10 CL=100F -0.5 Min. 2 0.8 0.4 0.5 20 40 A ms ms Typ. Max. Unit V V Table 7: Current Limit Characteristics (VI = 5.5V, IO = rated current, VIEN =VI, TJ = 25C, unless otherwise specified.) (See Note 1) Symbol IOS Parameter Test Conditions Min. 0.7 Typ. 1 Max. 1.3 Unit A Short Circuit Output Current VI =5V, OUT connected to GND, device enabled into short circuit Table 8: Supply Current Characteristics (VI = 5.5V, IO = rated current, VIEN =VI, TJ = 25C, unless otherwise specified.) (See Note 1) Symbol ISOL ISOH IL Parameter Current Low Level Output Current Low High Output Output Leakage Current Test Conditions VIENX = 0, No Load, VIENX = 0, No Load, VIENX = VI, No Load, VIENX = VI, No Load, TJ=-40 to 125C VIENX = 0, Output Connected to GND, TJ=-40 to 125C TJ=-40 to 125C 70 Min. Typ. 0.025 Max. 1 10 90 100 10 A A Unit A Table 9: Undervoltage Characteristics (VI = 5.5V, IO = rated current, VIEN =VI, TJ = 25C, unless otherwise specified.) (See Note 1) Symbol VIL VHYS Parameter Low Level Input Voltage Hysteresys Test Conditions Min. 2 100 Typ. Max. 2.5 Unit V mV Table 10: Overcurrent (OC) Characteristics (VI = 5.5V, IO = rated current, VIEN =VI, TJ = 25C, unless otherwise specified.) (See Note 1) Symbol ISINK VO IOFF TFB Parameter Sink Current Output Low Voltage OFF-State Current Fault-Blanking period VO =5V IO =5mA VO =5V VO =3.3V VI =5.5V, TJ=25C (See Note 2 and 3) 2 10 Test Conditions Min. 10 0.5 1 Typ. Max. Unit mA V A ms Note 1: Pulse testing techniques maintain junction temperature close to ambient temperature: thermal effect must be takes into account separately. Note 2: Specified by design, not production tested. Note 3: Guaranteed by design. 4/9 ST2052 Figure 3: Test Circuit Table 11: Waveform: Propagation Delays (f=1MHz; 50% duty cycle) 5/9 ST2052 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 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 8 (max.) 0.04 0016023/C 6/9 ST2052 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 7/9 ST2052 Table 12: Revision History Date 13-Jul-2005 Revision 2 Description of Changes Add bullet on pag. 1, add paragraph in the description on pag. 1 and add row TFB on Table 10. 8/9 ST2052 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 All other names are the property of their respective owners (c) 2005 STMicroelectronics - All Rights Reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 9/9 |
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