ST2054 Current limited Power distribution switches Features ■ 80mΩ high-side MOSFET switch ■ 500mA continuos 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 ■ 10ms OC_N fault blanking ■ 2.5ms typical rise time ■ Under voltage lock out ■ 20µA maximum standby supply current ■ Ambient temperature range, -40°C to 85°C ■ ESD protection SO-16 Description The ST2054 power distribution switches is intended for application where heavy capacitive loads and short circuits are likely to be encountered. These devices incorporate 80mΩ 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 components and allows operation from supplies as low as 2.7 V. Table 1. May 2007 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. Device summary Part number Package Packaging ST2054BD SO-16 Tube (50 parts per tube, 40 tube per box) ST2054BDR SO-16 Tape and reel (2500 parts per reel) Rev 4 1/13 www.st.com 13 Contents ST2054 Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.2 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2/13 ST2054 1 Block diagram Block diagram Figure 1. Block diagram 3/13 Pin connections 2 4/13 ST2054 Pin connections Figure 2. Pin connections (top view) Table 2. Pin functions Pln N° Symbol Description 1 GNDA 2 IN1 Input voltage 3 EN1 Enable input. Logic high turns on power switch IN-OUT1 4 EN2 Enable input. Logic high turns on power switch IN-OUT2 5 GNDB 6 IN2 Input voltage 7 EN3 Enable input. Logic high turns on power switch IN-OUT3 8 EN4 Enable input. Logic high turns on power switch IN-OUT4 9 OC4 Overcurrent. Logic output active low IN-OUT4 10 OUT4 Power switch output 11 OUT3 Power switch output 12 OC3 Overcurrent. Logic output active low IN-OUT3 13 OC2 Overcurrent. Logic output active low IN-OUT2 14 OUT2 Power switch output 15 OUT1 Power switch output 16 OC1 Ground Ground Overcurrent. Logic output active low IN-OUT1 ST2054 Electrical ratings 3 Electrical ratings 3.1 Absolute maximum ratings Stressing the device above the rating listed in the “Absolute Maximum Ratings” table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality documents. Table 3. Absolute maximum ratings Symbol VI VO VIENX IO ESD TJ Parameter Value Unit -0.3 to 6 V -0.3 - (VI + 0.3) V -0.3 to 6 V Input voltage range (1) Output voltage range (1) EN Input voltage range Continuous output current Internally Limited Electrostatic discharge Junction Operating Temperature 2 kV -40 to 125 C 1. All voltage are referred to GND 3.2 Recommended operating conditions Table 4. Recommended operating conditions Symbol VI Parameter Input voltage range (1) (1) VO Output voltage range IO Continuous output current (Per switch) Min Typ Max Unit 2.7 5.5 V 0 5.5 V 0 500 mA 1. All voltage are referred to GND 5/13 Electrical characteristics 4 ST2054 Electrical characteristics VI = 5.5V, IO = rated current, VIEN = VI, TJ = 25°C, unless otherwise specified. (See Note 1) Table 5. Symbol RDS(on) tr tf Table 6. Symbol Parameter Static drain-source ON-state resistance Output rise time Output fall time Test conditions Parameter VIL Low level input voltage Max VI = 5V IO = 0.5A 80 100 VI = 5V IO = 0.5A, TJ = 85°C 90 120 VI = 5V IO = 0.5A, TJ =125°C 100 135 VI = 3.3V IO = 0.5A 90 125 VI = 3.3V IO = 0.5A, TJ = 85°C 110 145 VI = 3.3V IO = 0.5A, TJ = 125°C 120 160 VI = 5.5V 2.5 VI = 2.7V 3 VI = 5.5V Unit mΩ ms RL = 10, CL = 1µF Test conditions VI = 2.7V to 5.5V 0.3 ms 0.2 Min Typ Max 2 Unit V VI = 4.5V to 5.5V 0.8 VI = 2.7V to 4.5V 0.4 V 0.5 µA RL= 10Ω CL=100µF 20 ms RL= 10Ω CL=100µF 40 ms II Input current VIENX = VI or 0V ton Turn-on time toff Turn-off time IOS Typ Enable Input ENx characteristics High level input voltage Symbol Min VI = 2.7V VIH Table 7. 6/13 Power switch electrical characteristics -0.5 Current limit characteristics Parameter Short circuit output current Test conditions VI = 5V, OUT connected to GND, device enabled into short circuit Min Typ Max Unit 0.7 1 1.3 A ST2054 Electrical characteristics Table 8. Symbol Parameter ISOL Current low level output ISOH Current low high output IL Output leakage current Table 9. Symbol VIL VHYS Table 10. Symbol ISINK Note: Supply current characteristics Test conditions Min. VIENX = 0, No Load, Typ. Max. 0.05 2 Unit µA VIENX = 0, No Load, TJ=-40 to 125°C 20 VIENX = VI, No Load, 140 180 µA VIENX = VI, No Load, TJ=-40 to 125°C 200 VIENX = 0, Output connected to GND, TJ=-40 to 125°C 20 µA Max. Unit 2.5 V Undervoltage characteristics Parameter Test conditions Low level input voltage Min. Typ. 2 Hysteresis 100 mV Overcurrent (OC) characteristics Parameter Test conditions Sink current VO = 5V VO Output low voltage IO = 5mA IOFF OFF-state current VO = 5V VO = 3.3V TFB Fault-blanking period VI = 5.5V, TJ = 25°C (See Note 2 and 3) Min. Typ. Max. 10 2 Unit mA 0.5 V 1 µA 10 1 Pulse testing techniques maintain junction temperature close to ambient temperature: thermal effect must be takes into account separately. 2 Specified by design, not production tested. 3 Guaranteed by design. ms 7/13 Electrical characteristics 8/13 Figure 3. Test circuit Figure 4. Waveform - propagation delays (f=1MHz; 50% duty cycle) ST2054 ST2054 5 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com 9/13 Package mechanical data ST2054 SO-16 MECHANICAL DATA DIM. mm. MIN. TYP A a1 inch MAX. MIN. TYP. 1.75 0.1 0.25 b 0.35 b1 0.19 a2 0.068 0.004 0.010 0.46 0.013 0.018 0.25 0.007 1.64 C MAX. 0.063 0.5 0.010 0.019 c1 45° (typ.) D 9.8 10 0.385 0.393 E 5.8 6.2 0.228 0.244 e 1.27 e3 8.89 F 3.8 G L M S 0.050 0.350 4.0 0.149 0.157 4.6 5.3 0.181 0.208 0.5 1.27 0.019 0.050 0.62 0.024 8° (max.) 0016020D 10/13 ST2054 Package mechanical data Tape & Reel SO-16 MECHANICAL DATA mm. inch DIM. MIN. A TYP MAX. MIN. 330 MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 TYP. 0.504 22.4 0.519 0.882 Ao 6.45 6.65 0.254 0.262 Bo 10.3 10.5 0.406 0.414 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 11/13 Revision history 6 ST2054 Revision history 1 Table 11. 12/13 Revision history Date Revision Changes 28-Oct-2004 2 Maturity change 13-Jul-2005 3 Add bullet on pag. 1, add paragraph in the description on pag. 1 and add row TFB on Table 10. 29-May-2007 4 Updated features in cover page, document reformatted ST2054 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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