ST2042BDR

ST2042 Enhanced power switch Not recommended for new design Features ■ 80 mΩ high-side MOSFET switch ■ 500 mA continuous current per channel ■ Thermal and short-circuit protection with overcurrent logic output ■ Operating range from 2.7 V to 5.5 V ■ CMOS- and TTL-compatible enable inputs r P e 10 ms OC_N fault-blanking ■ 2.5 ms typical rise time ■ Undervoltage lock out ■ 10 μA maximum standby supply current ■ Ambient temperature range, -40 °C to 85 °C ■ Fault-blanking t c u Order code ST2042BDR(1) P e d o r t e l o ) (s Device summary ST2042BD(1) u d o SO-8 ■ Table 1. ) s ( ct s b O Package Packaging SO-8 Tube (50 parts per tube, 40 tube per box) SO-8 Tape and reel (2500 parts per reel) 1. Not recommended for new design (refer to STMPS2242MTR). Contact ST sales office for availability. t e l o s b O November 2010 Doc ID 9679 Rev 6 This is information on a product still in production but not recommended for new designs. 1/13 www.st.com 13 Contents ST2042 Contents 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 ) s ( ct 4.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4.2 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 u d o r P e 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 t e l o ) (s s b O t c u d o r P e t e l o s b O 2/13 Doc ID 9679 Rev 6 ST2042 1 Description Description The ST2042 power distribution switches is intended for application where heavy capacitive loads and short-circuits are likely to be encountered. These devices incorporate 80 mΩ. 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. 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 10 ms 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. ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e t e l o s b O Doc ID 9679 Rev 6 3/13 Block diagram 2 ST2042 Block diagram Figure 1. Block diagram ) s ( ct r P e u d o Power switch t e l o ) (s s b O t c u d o r P e t e l o s b O 4/13 Doc ID 9679 Rev 6 ST2042 3 Pin connections Pin connections Figure 2. Pin connections (top view) Table 2. Pin functions ) s ( ct u d o Pin Symbol 1 GND 2 IN 3 EN1 Enable input. Logic low turns on power switch IN-OUT1. 4 EN2 Enable input. Logic low turns on power switch IN-OUT2. 5 OC2 6 OUT2 7 OUT1 r P e Ground Input voltage t e l o OC1 s b O Overcurrent. Logic output active low IN-OUT2. )- s ( t c 8 Description Power switch output Power switch output Overcurrent. Logic output active low IN-OUT2 u d o r P e t e l o s b O Doc ID 9679 Rev 6 5/13 Electrical ratings ST2042 4 Electrical ratings 4.1 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 Parameter Input voltage range(1) VI VO Output voltage VIENX IO EN Input voltage range Junction operating temperature 1. All voltages are referred to GND. ) (s V e t e ol -0.3 - (VI + 0.3) V -0.3 to 6 V Pr Internally limited s b O 2 kV -40 to 125 °C Recommended operating conditions Table 4. VI VO e t e ol IO s b O t c u Recommended operating conditions od Symbol 6/13 Unit u d o Electrostatic discharge TJ 4.2 -0.3 - 6 range(1) Continuous output current ESD ) s ( ct Value Pr Parameter Input voltage range(1) Min. Typ. Max. Unit 2.7 5.5 V range(1) 0 5.5 V Continuous output current (per switch) 0 500 mA Output voltage 1. All voltages are referred to GND. Doc ID 9679 Rev 6 ST2042 5 Electrical characteristics Electrical characteristics VI = 5.5 V, IO = rated current, VIEN = 0 V, TJ = 25 °C, unless otherwise specified (See Note 1 on page 8). Table 5. Symbol Power switch electrical characteristics Parameter Static drain-source ON-state resistance RDS(on) Test conditions Min. Output rise time IO = 0.5 A 80 100 VI = 5 V IO = 0.5 A, TJ = 85 °C 90 120 VI = 5 V IO = 0.5 A, TJ =125 °C 100 135 VI = 3.3 V IO = 0.5 A 90 125 VI = 3.3 V IO = 0.5 A, TJ = 85 °C 110 145 Output fall time Symbol e t e l RL = 10, C L = 1 µF o s b mΩ t c u od 120 Pr 160 2.5 ms 3 0.3 ms 0.2 Enable Input ENx characteristics O ) Parameter Test conditions s ( t c Min. Typ. Max. High level input voltage Low level input voltage VI = 4.5 to 5.5 V 0.8 VIL VI = 2.7 to 4.5 V 0.4 Input current VIENX = 0 V or VI Turn-on time Turn-off time e t e ol ton Table 7. Symbol IOS du o r P toff Unit (s) VIH II O VI = 5.5 V VI = 2.7 V Table 6. bs VI = 5.5 V VI = 2.7 V tf Max. VI = 5 V VI = 3.3 V IO = 0.5 A, TJ = 125 °C tr Typ. VI = 2.7 to 5.5 V 2 Unit V V 0.5 μA RL= 10 Ω, CL= 100 μF 20 ms RL= 10 Ω, CL= 100 μF 40 ms -0.5 Current limit characteristics Parameter Short-circuit output current Test conditions Min. Typ. Max. Unit VI = 5 V, OUT connected to GND, device enabled into short circuit 0.7 1 1.3 A Doc ID 9679 Rev 6 7/13 Electrical characteristics Table 8. Symbol Supply current characteristics Parameter Test conditions Typ. Max. 1 Current low level VIENX = VI, no load, output VIENX = VI, no load, TJ = -40 to 125 °C 0.025 Current low high output VIENX = 0, no load, 70 ISOH IL Output leakage current Symbol VIL VHYS Table 10. Symbol 10 90 VIENX = 0, no load, TJ = -40 to 125 °C 100 VIENX = VI, output connected to GND, TJ = -40 to 125 °C 10 Undervoltage characteristics Parameter Test conditions Min. Low level input voltage od r P e Overcurrent (OC) characteristics Parameter let Test conditions o s b ISINK Sink current VO = 5 V VO Output low voltage IO = 5 mA IOFF OFF-state current VO = 5 V, VO = 3.3 V TFB Fault-blanking period O ) s ( t c VI = 5.5 V, TJ = 25 °C (See Note 2 and Note 3) Min. 2.5 100 Typ. Max. s b O Doc ID 9679 Rev 6 Unit V Unit V 1 μA 10 Specified by design, not production tested. t e l o μA 0.5 2 Guaranteed by design. μA mA Pulse testing techniques maintain junction temperature close to ambient temperature: thermal effect must be takes into account separately. r P e μA mV 10 2 Unit ) s ( t Max. uc 2 Hysteresis u d o Typ. 1 3 8/13 Min. ISOL Table 9. Note: ST2042 ms ST2042 Electrical characteristics Figure 3. Figure 4. Test circuit Waveform - propagation delays (f = 1 MHz; 50% duty cycle) ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e t e l o s b O Doc ID 9679 Rev 6 9/13 Package mechanical data 6 ST2042 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Table 11. SO-8 mechanical data mm. inch Dim. Min. Typ. Max. Min. A 1.35 1.75 0.053 A1 0.10 0.25 0.004 A2 1.10 1.65 0.043 B 0.33 0.51 0.013 C 0.19 0.25 0.007 D 4.80 5.00 E 3.80 4.00 e H 5.80 h 0.25 L 0.40 ddd e t e ol t(s c u d k O ) ) s ( ct 0.010 du ro 0.065 0.020 0.010 0.189 0.197 0.15 0.157 0.050 6.20 0.228 0.244 0.50 0.010 0.020 1.27 0.016 0.050 8° (max.) 0.10 o r P s b O 10/13 Max. 0.069 P e let o s b 1.27 Typ. Doc ID 9679 Rev 6 0.004 ST2042 Package mechanical data Figure 5. Package dimensions ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e t e l o s b O Doc ID 9679 Rev 6 11/13 Revision history 7 ST2042 Revision history Table 12. Revision history Date Revision Changes 13-Jul-2005 4 Add bullet on pag. 1, add paragraph in the description on pag. 1 and add row TFB on Table 10. 29-May-2007 5 Updated features in cover page, document reformatted. 6 Document reformatted, added “Not Recommended for New Design” and Note 1 below Table 1, corrected typo in Features, Description, Figure 1, Table 2 to Table 8, Table 10, title of Figure 4, updated Table 1, Section 4.1, Section 5 and ECOPACK® text in Section 6. 24-Nov-2010 ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e t e l o s b O 12/13 Doc ID 9679 Rev 6 ST2042 ) s ( ct Please Read Carefully: u d o Information in this document is provided solely in connection with ST products. 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