ST890CD

ST890 1.2 A current limited high-side power switch with thermal shutdown Datasheet - production data Applications PCMCIA slots Access bus slots Portable equipment Description The ST890 device is a low voltage, P-channel MOSFET power switch intended for high-side load switching applications. The switch operates with inputs from 2.7 V to 5.5 V, making it ideal for both 3 V and 5 V systems. Features 2.7 to 5.5 V input range Programmable current limit up to 1.2 A Low quiescent current Thermal shutdown Active-low FAULT indicator output 90 mΩ (typ.) ON resistance SO8 and DFN8L 3x3 packages December 2016 The internal current limiting circuitry protects the input supply against overload. The thermal overload protection limits power dissipation and junction temperatures. The maximum current limit is 1.2 A. The current limit through the switch is programmed with a resistor from SET to ground. The devices are available in SO8 and DFN8L 3x3 packages. DocID8649 Rev 10 This is information on a product in full production. 1/19 www.st.com Contents ST890 Contents 1 Device summary .............................................................................. 3 2 Pinout information........................................................................... 4 3 4 Absolute maximum ratings and operating conditions ................. 5 Electrical information ...................................................................... 6 4.1 Characteristics and timings ............................................................... 6 4.2 Application circuit .............................................................................. 7 4.3 Functional description ....................................................................... 7 4.4 5 6 7 2/19 4.3.1 Output current limit ............................................................................. 7 4.3.2 Output short-circuit protection ............................................................ 7 4.3.3 Programming ILIM ................................................................................ 8 4.3.4 𝐅𝐀𝐔𝐋𝐓 pin........................................................................................... 8 4.3.5 Thermal protection.............................................................................. 8 Typical performance characteristics .................................................. 9 Package information ..................................................................... 10 5.1 SO8 package information ................................................................ 11 5.2 SO8 tape and reel information ........................................................ 12 5.3 DFN8L 3x3 package information ..................................................... 13 5.4 DFN8L 3x3 tape and reel information ............................................. 15 Ordering information..................................................................... 17 Revision history ............................................................................ 18 DocID8649 Rev 10 ST890 1 Device summary Device summary Figure 1: Schematic diagram Table 1: Truth table for ON /OFF switch ON /OFF OUT L ON H OFF Table 2: Truth table for FAULT FAULT FLAG H Normal operation L Fault condition DocID8649 Rev 10 3/19 Pinout information 2 ST890 Pinout information Figure 2: SO8 and DFN8L 3x3 pin connections (top view) 1. IN 1 8 FAULT IN 2 7 OUT ON 3 6 OUT GND 4 5 SET The exposed pad of the DFN8L 3x3 is not internally connected. It can be connected to the PCB groundplane for best thermal performance. Table 3: SO8 and DFN8L 3x3 pin description 4/19 Pin no. Symbol Name and function 1, 2 IN Input P-channel MOSFET source. Bypass IN with a 1 μF capacitor to ground. 3 ON Active-low switch ON input. A logic low turns the switch ON. 4 GND Ground 5 SET Set current limit input. A resistor from SET to GND sets the current limit for the switch. 6, 7 OUT Switch output. P-channel MOSFET drain. Bypass OUT with a 0.1 μF capacitor to ground. 8 FAULT Fault indicator output. This open drain output goes low when in current limit or when the die temperature exceeds 135 °C. DocID8649 Rev 10 ST890 3 Absolute maximum ratings and operating conditions Absolute maximum ratings and operating conditions Stressing the device above the ratings listed inTable 4: "Absolute maximum ratings" 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 of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 4: Absolute maximum ratings Symbol VI VON VFAULT_N VSET Parameter Value Voltage at IN pin -0.5 to 6 Input voltage at ON pin -0.5 to 6 Input voltage at FAULT_N pin -0.5 to 6 Voltage at SET pin Unit V -0.5 to (VIN + 0.5) IDS Maximum continuous switching current Tstg Storage temperature 1.5 A -65 to 150 °C Table 5: Thermal data Symbol Rthj-amb Parameter SO8 160 Thermal resistance junction-ambient (1) DFN8L Unit (2) °C/W 37.6 Notes: (1) This value depends on the thermal design of the PCB on which the device is mounted. (2)This value depends on the four-layer PCB, JEDEC standard test board. For best thermal performance, the exposed pad PCB area should be connected by a via to the PCB groundplane. Table 6: Operating conditions Symbol VI Toper Parameter ST890CDR Voltage at IN pin ST890BDR ST890DTR 2.7 to 5.5 Operating free-air temperature range DocID8649 Rev 10 0 to 70 -40 to 85 Unit V °C 5/19 Electrical information ST890 4 Electrical information 4.1 Characteristics and timings Table 7: Electrical characteristics Symbol TA = 25 °C Test condition (1) Parameter Unit Min. VI Operating voltage ID = 1 mA ICC ON quiescent supply current VI = 5 V, ON = GND, IO = 0 ICCOFF OFF quiescent supply current VULO Undervoltage lockout VHYST Undervoltage lockout hysteresis RON ON resistance VSET Reference voltage to turn the switch OFF IMAX Maximum programmable output over current limit Rising edge 120 VI = 3 V 90 130 1.24 1.302 IO = 100 mA, VSET rise until VI - VO > 0.8 V 1.178 V mΩ V 1.2 VIH ON input high level voltage 970 1.2 ILIM 1.5 ILIM 1110 1300 A 0.8 VI = 2.7 to 3.6 V 2 VI = 2.7 to 5.5 V 2.4 V ON input leakage current VI = 5.5 V ISET bias current VSET = 1.24 V, IO = 0, VI = VO 0.5 ISINK = 1 mA, VSET = 1.4 V 0.15 FAULT output leakage µA mV 75 VI = 2.7 to 5.5 V FAULT output low voltage 2.6 VI = 4.5 V ON input low level voltage IOH 2.4 100 VIL VOL 2 V 25 5 IO = 500 mA, VO > 1.6 V ISET bias 13 ON = IN, VI = 5.5 V, VO = 0 ILIM to ISET current ratio II 5.5 1 Short-circuit current limit ILIM/ISET 2.7 Max. ON = IN, VI = VOUT = 5.5 V VI = 5 V, OUT connected to GND, device enabled into short-circuit ISC Typ. 1 VFAULT = 5.5 V, VSET = 1 V 3 µA V 1 µA current TPROT Thermal protection 130 THYST Thermal hysteresis 15 Notes: (1)V IN 6/19 = 3 V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = 25 °C DocID8649 Rev 10 °C ST890 Electrical information Table 8: Timing characteristics TA = 25 °C Parameter Test condition (1) Slow current loop response time 20 % current overdrive, VCC = 5 V Symbol tRESP Min. Max. Unit 5 Fast current loop response time tON Typ. 2 VI = 5 V, IO = 500 mA 25 VI = 3 V, IO = 500 mA 50 µs 50 Turn ON time tOFF Turn OFF time VI = 5 V 1 2 10 Notes: (1)V IN 4.2 = 3 V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = 25 °C Application circuit Figure 3: Typical application circuit INPUT IN O UT IN O UT O UT PUT 0.1 μF 100 kΩ FAULT ON G ND SET ON / OFF 1 μF RSET 4.3 Functional description 4.3.1 Output current limit ILIM is the output current that the ST890 device limits under the condition VO (output voltage) > 1.6 V. When ILIM is reached, the FAULT pin is asserted. 4.3.2 Output short-circuit protection The ST890 device provides short-circuit protection by limiting the output current during a short circuit event. Isc is the output short-circuit current limit level (typ. 1.2 x ILIM). When a short circuit event occurs on the output, such as VO < 1.6 V, the ST890 device limits the output current to no more than the Isc level. When a short circuit event occurs on the output, the FAULT pin is asserted. DocID8649 Rev 10 7/19 Electrical information 4.3.3 ST890 Programming ILIM The ST890's ILIM can be programmed through the external resistor, RSET, connected at the SET pin (pin 5). ILIM is determined by the equations below. Equation 1 I SET = VSET RSET Equation 2 I LIM = 1110 I SET Therefore: Equation 3 RSET = 1.24 × 4.3.4 1110 I LIM 𝐅𝐀𝐔𝐋𝐓 pin The FAULT pin (pin 8) is an open drain active-low output. This pin should be connected to an external pull-up resistor. The FAULT pin is asserted low when: IOUT reaches the programmed ILIM value A short-circuit event occurs The device goes into thermal protection 4.3.5 Thermal protection The thermal protection of the ST890 is triggered to turn off the switch when the junction temperature exceeds 130 °C (typ.). 8/19 DocID8649 Rev 10 ST890 4.4 Electrical information Typical performance characteristics Unless otherwise specified Tj = 25 °C. Figure 4: ON resistance vs. supply voltage (A) Figure 5: ON resistance vs. supply voltage (B) Figure 6: ON resistance vs. temperature (A) Figure 7: ON resistance vs. temperature (B) Figure 8: Switching waveforms (A) Figure 9: Switching waveforms (B) DocID8649 Rev 10 9/19 Package information 5 ST890 Package information 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. 10/19 DocID8649 Rev 10 ST890 5.1 Package information SO8 package information Figure 10: SO8 package outline Table 9: SO8 mechanical data Dimensions Ref. Millimeters Min. Typ. A Inches Max. Min. Typ. 1.75 0.069 A1 0.10 A2 1.25 b 0.28 0.48 0.011 0.019 c 0.17 0.23 0.007 0.010 D 4.80 4.90 5.00 0.189 0.193 0.197 E 5.80 6.00 6.20 0.228 0.236 0.244 E1 3.80 3.90 4.00 0.150 0.154 0.157 e 0.25 Max 0.004 0.010 0.049 1.27 0.050 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 L1 k ccc 1.04 0° 0.040 8° 0.10 DocID8649 Rev 10 0° 8° 0.004 11/19 Package information 5.2 ST890 SO8 tape and reel information Figure 11: SO8 tape and reel outline 1. Drawing not to scale Table 10: SO8 tape and reel mechanical data Dimensions Symbol mm Min. Typ. A Max. Min. Typ. 330 12.8 D 20.2 0.795 N 60 2.362 Ao 8.1 Bo 13.2 — Max. 12.992 C T 12/19 Inches 0.504 22.4 0.519 — 0.882 8.5 0.319 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 DocID8649 Rev 10 0.335 ST890 5.3 Package information DFN8L 3x3 package information Figure 12: DFN8L 3x3 package outline 1. 2. Drawing is not to scale Dimensions in millimeters DocID8649 Rev 10 13/19 Package information ST890 Table 11: DFN8L 3x3 mechanical data Dimensions Ref. Millimeters Inches Min. Typ. Max. Min. Typ. Max A 0.80 0.85 0.90 0.031 0.033 0.035 A1 0 0.02 0.05 0 0.001 0.002 b 0.25 0.030 0.35 0.010 0.001 0.014 D 2.95 3 3.05 0.116 0.118 0.120 D2 2.30 2.40 2.50 0.091 0.094 0.098 E 2.95 3 3.05 0.116 0.118 0.120 E2 1.70 1.80 1.90 0.067 0.071 0.075 e L 0.65 0.25 0.30 0.026 0.35 0.010 Figure 13: DFN8L 3x3 recommended footprint 1. 2. 14/19 Drawing not to scale Dimensions in millimeters DocID8649 Rev 10 0.012 0.014 ST890 5.4 Package information DFN8L 3x3 tape and reel information Figure 14: DFN8L 3x3 tape and reel outline 1. 10 sprocket hole pitch cumulative tolerance ±0.20 DocID8649 Rev 10 15/19 Package information ST890 Figure 15: DFN8L 3x3 reel ouline 16/19 DocID8649 Rev 10 ST890 6 Ordering information Ordering information Table 12: Order codes Order code Temperature range ST890CDR 0 to 70 °C ST890BDR ST890DTR -40 to 85 °C Package SO8 DFN8L 3x3 DocID8649 Rev 10 Packaging Marking ST890C Tape and reel ST890B UD91 17/19 Revision history 7 ST890 Revision history Table 13: Document revision history Date Revision Changes 22-Jul-2005 4 Added 3 rows on Table 2 on page 3 10-Aug-2007 5 Removed ST890CD and ST890BD from Table 1 on page 1 Updated short circuit current limit value in Table 8 on page 7 1-Dec-2007 6 Added Section : Contents. Added ST890D and related DFN8L package information. Added Figure 2: DFN8L (3 x 3 mm) pin connection (top view) on page 4. Figure 3: Schematic diagram on page 5: redrawn, no content change. Modified title in Table 5: Truth table for FAULT on page 5. Updated Table 8: Electrical characteristics on page 7. Figure 4: Typical application circuit on page 8: redrawn, no content change. 13-Oct-2008 7 Updated: Table 2 on page 3, Table 3 on page 4. Added: Section 2.1: Functional description on page 9 and Figure 12 on page 18. 04-Mar-2009 8 Replaced ST890B, ST890C and ST890D with ST890. Modified: Table 6: Absolute maximum ratings Updated Figure 1, Figure 3, Table 5, Section 2.1 (overlined “ FAULT ” and “ ON ” pin, minor corrections). 25-Jan-2013 9 Updated Table 3 (added “Exposed pad”). Added cross-references to Section 2. Updated note 2. below Table 7. Updated Table 8 (parameter of IOH symbol corrected to “ FAULT output leakage current”). Updated ECOPACK in Section 3. Minor corrections throughout document. 12-Dec-2016 18/19 10 Updated datasheet layout Table 4: "Absolute maximum ratings": removed reference to the "SURE" program, updated name of parameter VI, and removed parameter Top. Added Table 6: "Operating conditions" Updated SO8 package information Table 11: "DFN8L 3x3 mechanical data": added inches dimensions Added Table 12: "Order codes" DocID8649 Rev 10 ST890 IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2016 STMicroelectronics – All rights reserved DocID8649 Rev 10 19/19