MIC2010_06 MICREL | Alldatasheet

Document overview

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Technical content

Features

  • Compliant to USB power distribution specifi cations
  • UL Recognized Component
  • Two completely independent switches
  • Integrated switching matrix supports ACPI S0/S3 state transitions without external FET circuits
  • Make-before-break switching ensures glitch-free transitions
  • No back-feed of auxiliary supply onto main supply dur- ing standby mode
  • Bi-level current-limit preserves auxiliary supply voltage regulation in standby mode
  • Thermally isolated channels
  • Thermal shutdown protection
  • Fault status outputs with fi lter prevents false assertions during hot-plug events
  • Latched thermal shutdown options with auto-reset (MIC2072)
  • Undervoltage lockout

Applications

  • Desktop PCs
  • Notebook PCs
  • Notebook Docking stations
  • LAN Servers
  • PC Motherboards Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com UL Recognized Component

MIC2012/2072 2 January 2005 Pin Confi guration 1FAULT1 S3# AUX GND

8 FAULT2

8-Pin SOIC (M) 1FAULT1 EN1 S3# NC AUX NC NC GND

16 FAULT2

16-Pin QSOP (QS)

Ordering Information

Part Number Circuit Breaker Temperature Standard Pb-Free Enable Fault Output Range Range Package MIC2012BM(1) MIC2012YM (1) n/a Open-Drain 0°C to +70°C 8-lead SOIC MIC2012CM MIC2012ZM n/a Open-Drain 0°C to +70°C 8-lead SOIC MIC2012PCM MIC2012PZM n/a Internal Pull-Up 0°C to +70°C 8-lead SOIC MIC2012-1PCQS MIC2012-1PZQS Active High Internal Pull-Up 0°C to +70°C 16-lead QSOP MIC2012-2PCQS MIC2012-2PZQS Active Low Internal Pull-Up 0°C to +70°C 16-lead QSOP MIC2072-1PCQS MIC2072-2PZQS Active High Internal Pull-Up Δ 0°C to +70°C 16-lead QSOP MIC2072-2PCQS MIC2072-2PZQS Active Low Internal Pull-Up Δ 0°C to +70°C 16-lead QSOP Note: 1. Contact factory for availablity

January 2005 3 MIC2012/2072 MIC2012 Micrel Pin Description Pin Number Pin Number Pin Name Pin Function 1 1 FAULT1 Fault Status (Output): Internal pull-up or open-drain. Asserted LOW when Channel is in a thermal shutdown state or overcurrent condition for more than 5ms. MIC2072 latches this output in its asserted state upon an over- current condition. Toggling EN1 or removing the load will reset the circuit breaker latch and deassert FAULT1. n/a 2 EN1 Enable (Input): Channel 1, active-high (–1) or active-low (–2). Toggling this input also resets the latched output of the MIC2072. 2 3 S3# Control (Input): When this input is HIGH, the MAIN inputs are connected to OUT1 and OUT2 via 100mΩ MOSFET switches. When this input is LOW the AUX inputs are connected to OUT1 and OUT2 via 500mΩ MOSFET switches. 3 5 AUX Auxiliary 5V Supply (Input): Also used as power supply for internal circuitry. n/a 4, 6, 7 NC No Connection: This pin may be connected to other pins without restriction. 4 8 GND Ground 5 9, 10 OUT2 Channel 2 (Output): For MIC2012-1, -2 both pins must be externally con- nected together. 6 11, 12 MAIN 5V Main Supply (Input): All MAIN inputs must be connected together exter- nally. 7 13, 14 OUT1 Channel 1 (Output): For MIC2012-1, -2 both pins must be externally con- nected together. n/a 15 EN2 Enable (Input): Channel 2, active-high (–1) or active-low (–2). Toggling this input also resets the latched output of the MIC2072. 8 16 FAULT2 Fault Status (Output): Internal pull-up or open-drain. Asserted LOW when Channel 2 is in a thermal shutdown state or overcurrent condition for more than 5ms. MIC2072 latches this output in its asserted state upon an over- current condition. Toggling EN2 or removing the load will reset the circuit breaker latch and deassert FAULT2.

MIC2012/2072 4 January 2005 Absolute Maximum Ratings (Note 1, Note 4) Operating Ratings (Note 2) Package Thermal Resistance

Electrical Characteristics

VMAIN = 5V; AUX = 5V; TA = 25°C; unless noted Symbol Parameter Condition Min Typ Max Units V MAIN MAIN Supply Voltage 4.5 5.0 5.5 V IMAIN (ON) MAIN Supply Current Switches On S3# = 1, no load 16 22 µA Note 5 IMAIN (OFF) MAIN Supply Current Switches Off S3# = 1, no load 5 µA Note 5, (MIC20x2-1, MIC20x2-2 only) ILEAK MAIN Reverse Leakage Current, S3# = 0, both switches ON, V MAIN = 0V –10 +10 µA VAUX AUX Supply Voltage 4.5 5.0 5.5 V IAUX ON AUX Supply Current, No load 0.6 1 mA both switches on, Note 5 S3# = 0 IAUX OFF AUX Supply Current, switches No load 5 µA off. (MIC20x2-1, MIC20x2-2 only) S3# = 0 VUV/AUX AUX Undervoltage Lockout V AUX increasing 3.1 4.0 V Threshold V AUX decreasing 2.9 3.8 V VHYS AUX Undervoltage Lockout 200 mV Hysteresis RDSMAIN MAIN On-Resistance, Each Output S3# = 1, I OUT = 500mA 100 140 mΩ RDSAUX AUX On-Resistance, Each Output S3# = 0, I OUT = 100mA 500 700 mΩ ILIMIT(MAIN) MAIN Current-Limit Threshold S3# = 1, V OUT = 4.0V, ramped load 0.8 2.0 A MAIN Short-Circuit Current-Limit V OUT = 0V 0.65 1.8 A ILIMIT(AUX) AUXCurrent-Limit Threshold S3# = 0, V OUT = 4.0V, ramped load 105 150 195 mA AUX Short-Circuit Current-Limit V OUT = 0V, COUT = 100µF 80 mA VTH S3#, EN1, EN2. Input High-to-Low transition 0.8 1.5 V Threshold Voltage Low-to-High transition 1.7 2.0 V (EN1, EN2, for MIC20x2-x only) VHYS EN1, EN2 and S3# Input Hysteresis 200 mV (EN1, EN2, for MIC20x2-x only) IIN S3#, EN1, EN2 Input Current VS3/EN = 5V, 0V –1 1 µA (EN1, EN2, for MIC20x2-x only) IOFF OUT1, OUT2 Leakage Current Outputs are off, VOUT = 0 –10 10 µA (MIC2012-x, MIC2072-x only) Pull-Up Current During Latched Outputs latched off 1 mA Output State (MIC2072-1, -2)

January 2005 5 MIC2012/2072 MIC2012 Micrel Symbol Parameter Condition Min Typ Max Units VTH LATCH Latch Reset Threshold V OUT Rising 1.95 V (MIC2072, MIC2072-x only) Minimum Output Slew Rate 0.4 V/s to Reset Latch (MIC2072, MIC2072-x only), Note 6 Overtemperature Threshold T J increasing, single channel 140 °C T J decreasing, single channel 120 °C T J increasing, both channels 160 °C T J decreasing, both channels 150 °C VOL FAULT Output Low Voltage I FAULT = 5mA 0.2 V VOH FAULT Output High Voltage I FAULT = –20µA 4 V (MIC2012-1P,-2P),(MIC2072-1P,-2P) FAULT Output Off Current V FAULT = 5V 0.2 10 µA (Not Applicable to 'P' Options) TH MAIN to S3# Hold Time, Note 6 Figure 5 5 ms TS MAIN to S3# Set-up Time, Note 6 Figure 5 0 ms tDLY FAULT Delay Filter Response Time Output shorted to ground, Figure 4 5 10 20 ms (Overcurrent only), Note 7 tOC Overcurrent Response Time Output shorted to ground, Figure 4 MAIN output 2 µs AUX output 2 µs t ON(MAIN) MAIN Output Turn-On Time R L = 10Ω, CL = 1µF, Figure 3 2 ms tOFF(MAIN) MAIN Output Turn-Off Time R L = 10Ω, CL = 1µF, Figure 3 35 µs (MIC20x2-x only) tr(MAIN) MAIN Output Rise Time R L = 10Ω, CL = 1µF, Figure 3 2 ms tf(MAIN) MAIN Output Fall Time R L = 10Ω, CL = 1µF, Figure 3 32 µs (MIC20x2-x only) tON(AUX) AUX Output Turn-On Time R L = 50Ω, CL = 1µF, Figure 3 0.6 ms tOFF(AUX) AUX Output Turn-Off Time R L = 50Ω, CL = 1µF, Figure 3 120 µs (MIC20x2-x only) tr(AUX) AUX Output Rise Time R L = 50Ω, CL = 1µF, Figure 3 0.5 ms tf(AUX) AUX Output Fall Time R L = 50Ω, CL = 1µF, Figure 3 115 µs (MIC20x2-x only) tXMA MAIN to AUX S3# transition to 0 5 7.5 ms Cross Conduction Time, Note 8 tXAM AUX to MAIN S3# transition to 1 5 7.5 ms Cross Conduction Time, Note 8 Note 1. Exceeding the absolute maximum rating may damage the device. Note 2. The device is not guaranteed to function outside its operating rating. Note 4. All voltages are referenced to ground. occurs when VEN < 0.8V. Note 6. Guaranteed by design. Not production tested. Note 7. Assumes only one channel in current-limit. Delay circuitry is shared among channels so it is possible for t DLY to be 40ms max if one channel enters current-limit as the other is about to time-out. Note 8. Cross conduction time is the duration in which both MAIN and AUX internal switches are on subsequent to S3# transitioning.

January 2005 7 MIC2012/2072 MIC2012 Micrel Test Circuit Device Under Test CL OUT RL VOUT IOUT 90%VOUT 10% 90% 10% tr tf

MIC2012/2072 8 January 2005 Typical Characteristics -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Main Supply Current vs. Temperature (Main 1 and Main 2 = ON) IOUT = 0µA 5.5V MAIN 5.0 VMAIN4.5 VMAIN V MAIN = 4.5, 5.0, 5.5V EN1 = EN2 = [ON],V AUX = S3# = 5.0V 0.025 0.05 0.075 0.1 0.125 0.15 0.175 0.2 0.225 0.25 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Main Supply Current vs. Temperature (Main 1 and Main 2 = OFF) IOUT = 0µA 5.5V MAIN 5.0 VMAIN

4.5 VMAIN

V MAIN = 4.5, 5.0, 5.5V EN1 = EN2 = [OFF],V AUX = S3# = 5.0V 1.00 1.05 1.10 1.15 1.20 1.25 1.30 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Main Short-Circuit Current-Limit vs. Temperature 5.0V AUX 4.5V AUX 5.5V AUX V MAIN = 5.0V 1.10 1.15 1.20 1.25 1.30 1.35 1.40 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Main Short-Circuit Current-Limit Threshold vs. Temperature 5.5V AUX V MAIN = 5.0V 5.0V AUX 4.5V AUX 200 400 600 800 1000 1200 1400 1600 1800 2000 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Main Rise-Time vs. Temperature (EN Toggled) R L = 10Ω C L = 1µF 4.5V AUX

5.0 VAUX

5.5 VAUX

V MAIN = 5.0V 100 200 300 400 500 600 700 800 900 1000 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) AUX Supply Current vs. Temperature (AUX 1 and AUX 2 = ON) IOUT = 0µA EN1 = EN2 = [ON] 5.5V AUX 5.0 VAUX4.5 VAUX V MAIN = S3# = 0V 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) AUX Supply Current vs. Temperature (AUX 1 and AUX 2 = OFF) IOUT = 0µA EN1 = EN2 = [OFF] 5.5V AUX

4.5 VAUX

V MAIN = S3# = 0V 1.2 1.4 1.6 1.8 2.0 2.2 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Enable Threshold (increasing) vs. Temperature (MIC2012-1/-2) 5.5V AUX V MAIN = S3# = 5.0V 1.0 1.2 1.4 1.6 1.8 2.0 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Enable Threshold (decreasing) vs. Temperature (MIC2012-1/-2) 5.5V AUX V MAIN = S3# = 5.0V 1.2 1.4 1.6 1.8 2.0 2.2 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Enable Threshold (increasing) vs. Temperature (MIC2012-1/-2) 5.0V MAIN V AUX = S3# = 5.0V V MAIN = 4.5V to 5.5V 5.5V MAIN 4.5V MAIN 1.0 1.2 1.4 1.6 1.8 2.0 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Enable Threshold (decreasing) vs. Temperature (MIC2012-1/-2) 5.0V MAIN V AUX = S3# = 5.0V V MAIN = 4.5V to 5.5V 5.5V MAIN 4.5V MAIN 200 400 600 800 1000 1200 1400 1600 1800 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Pull-Up Current vs. Temperature (Output Latched Off–MIC2072) 5.5V AUX V MAIN = 5.0 V 5.0V AUX 4.5V AUX

January 2005 9 MIC2012/2072 MIC2012 Micrel 1.50 1.75 2.00 2.25 2.50 2.75 3.00 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Output Reset Threshold vs. Temperature 5.5V AUX V MAIN = 5.0 V (Output Latched Off –MIC2072) VOUT Rising 5.0V AUX4.5V AUX

MIC2012/2072 10 January 2005 VMAIN = VAUX = 5V CL = 100F RL = 10 AUX Start-up by UVLO TIME (500s/div) VAUX (2V/div) FAULT (2V/div) VOUT (2V/div) IOUT (50mA/div) VAUX ramps from 0V to 5V VMAIN = S3# = 0V EN = [ON] RLOAD = 50 CLOAD = 1F VMAIN = VAUX = 5V CL = 100F RL = 10 AUX Shutdown by UVLO TIME (10ms/div) 2.96V VAUX ramps from 5V to 0V VMAIN = S3# = 0V EN = [ON] RLOAD = 50 CLOAD = 1F VAUX (2V/div) FAULT (2V/div) VOUT (2V/div) IOUT (50mA/div) Main Start-up by UVLO TIME (500s/div) 3.20V VMAIN (2V/div) FAULT (2V/div) VOUT (2V/div) IOUT (200mA/div) VMAIN = VAUX;VMAIN & VAUX ramp from 0V to 5V S3# = 5V EN = [ON] RLOAD = 10 CLOAD = 1F S3# = 5V EN = [ON] R LOAD = 10½ CLOAD = 1µF VMAIN = VAUX;VMAIN & VAUX ramp from 5V to 0V VMAIN (2V/div) FAULT (2V/div) VOUT (2V/div) IOUT (200mA/div) Main Shut-down by UVLO TIME (10ms/div) 2.96V Main Turn-On Response TIME (250s/div) VMAIN = VAUX =5V S3# = 5V EN toggles from [OFF] to [ON] RLOAD = 10 CLOAD = 1F EN (5V/div) FAULT (5V/div) VOUT (2V/div) IOUT (200mA/div) Main Turn-Off Response TIME (100s/div) VMAIN = VAUX =5V S3# = 5V EN toggles from [ON] to [OFF] RLOAD = 10 CLOAD = 1F EN (5V/div) FAULT (5V/div) VOUT (5V/div) IOUT (200mA/div) Functional Characteristics

January 2005 11 MIC2012/2072 MIC2012 Micrel AUX Turn-On Response TIME (100s/div) VAUX =5V VMAIN = S3# = 0V EN toggles from [OFF] to [ON] RLOAD = 50 CLOAD = 1F EN (5V/div) FAULT (5V/div) VOUT (5V/div) IOUT (50mA/div) AUX Turn-Off Response TIME (100s/div) VAUX =5V VMAIN = S3# = 0V EN toggles from [ON] to [OFF] RLOAD = 50 CLOAD = 1F EN (5V/div) FAULT (5V/div) VOUT (5V/div) IOUT (50mA/div) Turn-On from S3# to AUX TIME (100s/div) VAUX =5V, VMAIN = 0V EN = [ON] S3# toggles from [HI] to [LOW] RLOAD = 50 CLOAD = 1F S3# (5V/div) FAULT (5V/div) VOUT (5V/div) IOUT (50mA/div) Turn-Off from AUX to S3# TIME (1ms/div) VAUX =5V, VMAIN = 0V S3# toggles from [LO] to [HI] EN = [ON] RLOAD = 50 CLOAD = 1F S3# (5V/div) FAULT (5V/div) VOUT (2V/div) IOUT (50mA/div) Main Inrush Current into CLOAD TIME (500s/div) CL = 560F CL = 100F CL = 10F VMAIN = VAUX = 5V S3# = 5V EN toggles from [OFF] to [ON] RLOAD = OPEN CLOAD = 10F, 100F, 560F EN (5V/div) FAULT (5V/div) VOUT (5V/div) IOUT (500mA/div) Main-Ramped to Short by MOSFET 1.4A TIME (50ms/div) VMAIN = VAUX =5V S3# = 5V, EN = [ON] CLOAD = 1F FAULT (5V/div) VOUT (2V/div) IOUT (500mA/div) RLOAD toggles from > 1k to <0.5

MIC2012/2072 12 January 2005 AUX Ramped to Short by MOSFET TIME (25ms/div) VAUX = 5V VMAIN = S3# = 0V, EN = [ON] RLOAD toggles from >1k to <0.5 CLOAD = 1F FAULT (5V/div) VOUT (2V/div) IOUT (100mA/div) Main Turn-On into Short TIME (2.5ms/div) 1.2A V MAIN = VAUX =5V S3# = 5V EN toggles from [OFF] to [ON] RLOAD = Short CLOAD = 1F EN (5V/div) FAULT (5V/div) VOUT (5V/div) IIN (500mA/div) AUX Turn-On into Short TIME (2.5ms/div) VAUX =5V VMAIN = S3# = 0V EN toggles from [OFF] to [ON] CLOAD = 100F EN (5V/div) FAULT (5V/div) VOUT (2V/div) IOUT (100mA/div) AUX Inrush Current into Large CLOAD TIME (2.5ms/div) 230mA VAUX =5V VMAIN = S3#= 0V EN toggles from [OFF] to [ON] ILOAD < 10mA CLOAD = 220F EN (5V/div) FAULT (10V/div) VOUT (5V/div) IIN (50mA/div) AUX Inrush Current into Small CLOAD TIME (100s/div) VAUX =5V VMAIN = S3# = 0V EN toggles from [OFF] to [ON] ILOAD < 10mA CLOAD = 10F EN (5V/div) FAULT (10V/div) VOUT (5V/div) IIN (50mA/div) Main-to-AUX Cross Conduction TIME (250s/div) 950s VMAIN = VAUX = 5V S3# toggles from [HI] to [LO] EN = [ON] RLOAD = 50 CLOAD = 1F S3# (5V/div) IAUX (50mA/div) VOUT (5V/div) IMAIN (50mA/div)

January 2005 13 MIC2012/2072 MIC2012 Micrel AUX-to-Main Cross Conduction TIME (1ms/div) 3.96ms VMAIN = VAUX =5V S3# toggles from [LO] to [HI] EN = [ON] RLOAD = 50 CLOAD = 1F S3# (5V/div) VOUT (5V/div) IAUX (50mA/div) IMAIN (50mA/div)

MIC2012/2072 14 January 2005 Functional Description The MIC2012/2072 are designed to support the power distri- bution requirements for USB wakeup from the ACPI S3 state. It integrates two independent channels under control of input S3#. When S3# is asserted LOW (S3 state) the MIC2012/2072 will switch a 500mΩ, 100mA MOSFET switch from the AUX input to each of its two outputs. Conversely when the S3# input is HIGH (S0 state) the MIC2012/72 will switch a 100mΩ, 500mA MOSFET switch from the MAIN input to each of its two outputs. The lower current limit during the ACPI S3 state helps to ensure that the standby supply maintains regulation even during fault conditions. Thermal Shutdown Thermal shutdown is employed to protect the device from damage should the die temperature exceed safe margins due mainly to short circuit faults. Thermal shutdown shuts off the output MOSFET and asserts the FAULT output if the die temperature reaches 140°C and the overheated channel is in current limit. The other channel is not affected. If, however, the die temperature exceeds 160°C, both channels will be shut off even if neither channel is in current limit. Power Dissipation The device’s junction temperature depends on several fac- tors such as the load, PCB layout, ambient temperature and package type. The power dissipated in each channel is P D = RDS(on) × IOUT 2 where RDS(on) is the on-resistance of the internal MOSFETs and I OUT is the continuous output current. Total power dissipation of the device will be the summation of PD for both channels. To relate this to junction temperature, the following equation can be used: Functional Diagram Current Limit 10ms Timer Charge Pump Gate Control S3# EN Current Limit MAIN OUT AUX /FAULT AUX Latch To Other Channel MAIN FET AUX FET *MIC2070-1/2 Only Thermal Sense * 'P' options only TJ = P D × θJA + TA where: T J = junction temperature T A = ambient temperature θJA = is the thermal resistance of the package Current Sensing and Limiting The current-limit thresholds are preset internally for each state. The preset level prevents damage to the device and external load but still allows a minimum current of 100mA or 500mA to be delivered to the load depending on the state of the device according to the S3# input. When S3# is LOW the current-limit is set at 100mA minimum. When S3# is HIGH the current-limit is set at 500mA minimum. Should an over-current condition last longer than t DLY, the MIC2072 will latch the faulty output off. The output will remain off until either the load is removed or the EN signal (MIC2072- 1, -2) is toggled. When the MIC2072 enters a latched output condition a 1mA pull-up current source is activated. This provides a way to automatically reset the output once the load is removed without the need to toggle the enable input such as in the MIC2072. Please refer to Figure 7 for timing details. The MIC2012 will automatically reset its output when the die temperature cools down to 120°C. The MIC2012 output and FAULT signal will continue to cycle on and off until the device is disabled or the fault is removed. Figure 6 depicts typical timing. Depending on PCB layout, package, ambient temperature, etc., it may take several hundred milliseconds from the incidence of the fault to the output MOSFET being shut off. This time duration will be shortest in the case of a

MIC2012/2072 16 January 2005

Package Information

16-Pin QSOP (QS) 8-Pin SOIC (M) MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifi cations at any time without notifi cation to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a signifi cant injury to the user. A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2004 Micrel Incorporated