MP62170-1/MP62171-1 3.3V/5V, Single-Channel 1.5A Current-Limited Power Distribution Switch with Output Discharge The Future of Analog IC Technology DESCRIPTION FEATURES The MP62170-1/MP62171-1 Power Distribution Switch features internal current limiting to prevent damage to host devices due to faulty load conditions. The MP62170-1/MP62171-1 analog switch has 75mΩ on-resistance and operates from 2.7V to 5.5V input. It is available with guaranteed current limits, making it ideal for load switching applications. The MP621701/MP62171-1 has built-in protection for both over current and increased thermal stress. For over current, the device will limit the current by changing to a constant current mode. • • • • • • • • • • • • • As the temperature increases as a result of short circuit, then the device will shut off. The device will recover once the device temperature reduces to approx 120°C. MP62170-1/MP62171-1 involves discharge function that provides a resistive discharge path for the external output capacitor when the part is disabled. MP62170-1/MP62171-1 is available in 8-pin MSOP and SOIC package without exposed pad. 1.5A Continuous Current Accurate Current Limit Output Discharge Function 2.7V to 5.5V Supply Range 90uA Quiescent Current 75mΩ MOSFET Thermal-Shutdown Protection Under-Voltage Lockout 8ms FLAG Deglitch Time No FLAG Glitch During Power Up Reverse Current Blocking Active High & Active Low Options SOIC8 & MSOP8 Packages APPLICATIONS • • • • • • • Smartphone and PDA Portable GPS Device Notebook PC Set-top-box Telecom and Network Systems PC Card Hot Swap USB Power Distribution “MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION 3.3V / 5V Input 1 GND MP62170-1/ MP62171-1 2, 3 IN 4 EN* OUT 6, 7, 8 To VBUS USB Ports FLAG 5 * EN is active high for MP62171-1 SINGLE-CHANNEL MP62170-1/MP62171-1 Rev.1.0 www.MonolithicPower.com 10/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 1 MP62170-1/MP62171-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH ORDERING INFORMATION Part Number Enable Switch MP62170ES-1* MP62170EK-1 MP62171ES-1 MP62171EK-1 Active Low Free Air Temperature (TA) Maximum Typical ShortContinuous Circuit Current Package Top Marking Load Current @ TA=25C Single 1.5A SOIC8 MSOP SOIC8 MSOP 2.3A Active High 62170ES-1 62170EK-1 62171ES-1 62171EK-1 -20°C to +85°C * For Tape & Reel, add suffix –Z (e.g. MP62170ES-1–Z). For RoHS compliant packaging, add suffix –LF(e.g. MP62170ES-1–LF–Z) PACKAGE REFERENCE TOP VIEW GND 1 8 OUT GND 1 8 OUT IN 2 7 OUT IN 2 7 OUT IN 3 6 OUT EN* 4 5 FLAG IN 3 6 OUT EN* 4 5 FLAG MSOP8 SOIC8 MP62170-1 Single-Channel (* EN is active high for MP62171-1) ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance (3) IN .................................................-0.3V to +6.0V EN, FLAG, OUT to GND ..............-0.3V to +6.0V Continuous Power Dissipation (TA = +25°C) (2) SOIC8..................................................... 1.4W MSOP8...................................................... 0.8W Junction Temperature ...............................150°C Lead Temperature ....................................260°C Storage Temperature............... -65°C to +150°C Operating Junct. Temp (TJ).......-20°C to +125°C SOIC8..................................... 90 ...... 42... °C/W MSOP8…. ............................. 150 ..... 65... °C/W θJA θJC Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD (MAX) = (TJ (MAX)-TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) Measured on JESD51-7， 4-layer PCB. MP62170-1/MP62171-1 Rev.1.0 www.MonolithicPower.com 10/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 2 MP62170-1/MP62171-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH ELECTRICAL CHARACTERISTICS (4) VIN=5V, TA=+25°C, unless otherwise noted. Parameter Condition IN Voltage Range Supply Current Shutdown Current Off Switch Leakage Typ Max Units 5.5 120 V µA µA µA 2.3 3 A 2.5 3.3 A 2.65 0.8 0.4 V mV mΩ V V V 1 µA 0.5 0.5 3 °C °C ms ms ms ms ms 10 ms 2.7 EN Enabled, IOUT=0 Device Disable, VOUT=float, VIN=5.5V Device Disable, VIN=5.5V Current Limit 90 1 1 1.6 Trip Current Under-voltage Lockout Under-voltage Hysteresis FET On Resistance EN Input Logic High Voltage EN Input Logic Low Voltage FLAG Output Logic Low Voltage FLAG Output High Leakage Current Thermal Shutdown Thermal Shutdown Hysteresis VOUT Rising Time, Tr (5) VOUT Falling Time, Tf (6) Turn On Time, Ton (7) Turn Off Time, Toff Min (8) Discharge Resistance FLAG Deglitch Time EN Input Leakage Reverse Leakage Current Current Ramp (slew rate≤100A/s) on Output Rising Edge 1.95 250 75 IOUT=100mA (-20°C≤TA≤+85°C) 130 2 ISINK=5mA VIN=VFLAG=5.5V 140 20 0.9 1.7 VIN=5.5V, CL=1uF, RL=5.5Ω VIN=2.7V, CL=1uF, RL=5.5Ω VIN=5.5V, CL=1uF, RL=5.5Ω VIN=2.7V, CL=1uF, RL=5.5Ω CL=100µF, RL=5.5Ω CL=100µF, RL=5.5Ω 500 4 VOUT =5.5V, VIN =GND 8 1 0.2 Ω 15 ms µA µA Notes: 4) Production test at +25°C. Specifications over the temperature range are guaranteed by design and characterization. 5) Measured from 10% to 90% output signal. 6) Measured from 90% to 10% output signal. 7) Measured from 50% EN signal to 90% output signal. 8) Measured from 50% EN signal to 10% output signal. MP62170-1/MP62171-1 Rev.1.0 www.MonolithicPower.com 10/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 3 MP62170-1/MP62171-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH PIN FUNCTIONS SOIC8 MSOP8 Name Description 1 2, 3 GND IN Ground. Input Voltage. Accepts 2.7V to 5.5V input. 4 ——— 5 FLAG IN-to-OUT Over-current, active-low output flag. Open-Drain. 6, 7, 8 OUT IN-to-OUT Power-Distribution Output (for all 3 output pins) Active High: (MP62171-1), Active Low: (MP62170-1). EN TYPICAL PERFORMANCE CHARACTERISTICS TA = +25ºC, unless otherwise noted. OUTx tf tr RL CL Vo (OUTx) 90% 10% 90% 10% TEST CIRCUIT 50% ENx 50% ENx toff ton Vo (OUTx) 90% 50% 50% ton Vo (OUTx) toff 90% 10% 10% VOLTAGE WAVEFORMS Figure 1—Test Circuit and Voltage Waveforms MP62170-1/MP62171-1 Rev.1.0 www.MonolithicPower.com 10/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 4 MP62170-1/MP62171-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED) VIN = 5V, VEN = 0V, VCC = 5V, CL = 2.2uF, TA = +25°C, unless otherwise noted. 3 2.5 2 1.5 2.5 3 3.5 4 4.5 5 5.5 1.8 1.1 RISE TIME(ms) 3.5 1 2 1.2 TURN OFF DELAY (ms) TURN ON DELAY (ms) 4 1 0.9 1.4 1.2 1 0.8 2.5 6 1.6 3 INPUT VOLTAGE (V) 3.5 4 4.5 5 5.5 0.8 6 2.5 3 INPUT VOLTAGE (V) 3.5 4 4.5 5 5.5 6 INPUT VOLTAGE (V) 70 SUPPLY CURRENT (uA) 120 65 FALL TIME (us) STATIC DRAIN-SOURCE ON-STATE RESISTANCE VARIATION (%) Supply Current, Output Enabled Static Drain-Source On-State Resistance Variation vs. vs.Input Voltage Ambient Temperature 60 55 50 45 2.5 3 3.5 4 4.5 5 5.5 110 100 90 80 70 2.5 3 6 INPUT VOLTAGE (V) 3.5 4 4.5 5 5.5 6 AMBIENT TEMPERATURE (oC) INPUT VOLTAGE (V) Static Drain-Source On-State Resistance vs. Input Voltage Current Limit vs. Input Voltage Input to Output Voltage vs. Load Current 130 120 110 100 90 80 2.5 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) 6 2.3 200 180 160 CURRENT LIMIT (A) INPUT TO OUTPUT VOLTAGE (mV) STATIC DRAIN-SOURCE ON-STATE IO=1.5A 140 70 IO=0.1A 30 25 20 15 10 5 0 -5 -10 -15 -20 -25 -30-20-10 0 10 20 30 40 50 60 70 80 90 140 120 100 80 60 40 2.2 2.1 2 1.9 20 0 1.8 0 0.3 0.6 0.9 1.2 OUTPUT CURRENT (A) 1.5 2.5 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) MP62170-1/MP62171-1 Rev.1.0 www.MonolithicPower.com 10/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 6 5 MP62170-1/MP62171-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED) Threshold Trip Current vs. Input Voltage 2.8 2.7 2.6 2.5 2.4 2.3 2.5 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) 6 CURRENT LIMIT RESPONSE TIME (us) THRESHOLD TRIP CURRENT (A) VIN = 5V, VEN = 0V, VCC = 5V, CL = 2.2uF, TA = +25°C, unless otherwise noted. Current Limit Response vs. Peak Current 12 10 8 6 4 2 4 6 8 1012 1416182022242628 PEAK CURRENT (A) VOUT 2V/div. VOUT 2V/div. VOUT 2V/div. EN 2V/div. EN 2V/div. EN 2V/div. 1ms/div. 100us/div. 1ms/div. Short Circuit Current, Device Enabled into Short Threshold Trip Current with Ramped Load on Enabled Device VOUT 2V/div. IOUT 1A/div. VOUT 2V/div. EN 2V/div. EN 2V/div. IOUT 1A/div. 400us/div. 400us/div. MP62170-1/MP62171-1 Rev.1.0 www.MonolithicPower.com 10/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 1ms/div. 6 MP62170-1/MP62171-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED) VIN = 5V, VEN = 0V, VCC = 5V, CL = 2.2uF, TA = +25°C, unless otherwise noted. 220uF Flag 2V/div. IOUT 1A/div. IOUT 1A/div. 470uF 100uF IOUT 1A/div. EN 2V/div. 2ms/div. Flag 5V/div. 1ms/div. 2ms/div. VOUT 2V/div. EN 2V/div. Flag 5V/div. IOUT 1A/div. 2ms/div. MP62170-1/MP62171-1 Rev.1.0 www.MonolithicPower.com 10/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 7 MP62170-1/MP62171-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH FUNCTION BLOCK DIAGRAM UVLO IN Current Sense -- -- -- OUT -- -- -- -- Charge Pump -Vref -- --- AMP + + Logic -- -- EN* FLAG Deglitch -- -- Thermal Sense GND * EN is active high for MP62171-1 Figure 2—Functional Block Diagram MP62170-1/MP62171-1 Rev.1.0 www.MonolithicPower.com 10/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 8 MP62170-1/MP62171-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH DETAILED DESCRIPTION Over Current When the load exceeds trip current (minimum threshold current triggering constant-current mode) or a short is present, MP621701/MP62171-1 switches into to a constant-current mode (current limit value). MP62170-1/MP621711 will be shutdown only if the over current condition stays long enough to trigger thermal protection. Trigger over current protection for different overload conditions occurring in applications: 1) The output has been shorted or overloaded before the device is enabled or input applied. MP62170-1/MP62171-1 detects the short or overload and immediately switches into a constant-current mode. 2) A short or an overload occurs after the device is enabled. After the current-limit circuit has been tripped (reached the trip current threshold), the device switches into constantcurrent mode. However, high current may flow for a short period of time before the current-limit circuit can react. 3）Output current has been gradually increased beyond the recommended operating current. The load current rises until the trip current threshold is reached or until the thermal limit of the device is exceeded. The MP62170-1/ MP62171-1 is capable of delivering current up to the trip current threshold without damaging the device. Once the trip threshold has been reached, the device switches into its constantcurrent mode. Thermal Protection The purpose of thermal protection is to prevent damage in the IC by allowing exceptive current to flow and heating the junction. The die temperature is internally monitored until the thermal limit is reached. Once this temperature is reached, the switch will turn off and allow the chip to cool. The switch has a built-in hysteresis. Under-voltage Lockout (UVLO) This circuit is used to monitor the input voltage to ensure that the MP62170-1/MP62171-1 is operating correctly. This UVLO circuit also ensures that there is no operation until the input voltage reaches the minimum spec. Enable The logic pin disables the chip to reduce the supply current. The device will operate once the enable signal reaches the appropriate level. The input is compatible with both COMS and TTL. Output Discharge The part involves a discharge function that provides a resistive discharge path for the external output capacitor. The function will be active when the part is disabled (Input voltage is under UVLO or enable is deasserted) and it will be done in a very limited time. Flag Response The FLAG pin is an open drain configuration. This FAULT will report a fail mode after an 8ms deglitch timeout. This is used to ensure that no false fault signals are reported. This internal deglitch circuit eliminates the need for extend components. The FLAG pin is not deglitched during an over temp. or voltage lockout. MP62170-1/MP62171-1 Rev.1.0 www.MonolithicPower.com 10/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 9 MP62170-1/MP62171-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH APPLICATION INFORMATION Power-Supply Considerations Over 10µF capacitor between IN and GND is recommended. This precaution reduces powersupply transients that may cause ringing on the input and improves the immunity of the device to short-circuit transients. In order to achieve smaller output load transient, placing a high-value electrolytic capacitor on the output pin(s) is recommended when the output load is heavy. 3.3V / 5V Input 1 GND MP62170-1/ MP62171-1 2, 3 IN 4 EN* OUT 6, 7, 8 To VBUS USB Ports FLAG 5 * EN is active high for MP62171-1 SINGLE-CHANNEL Figure 3—Application Circuit MP62170-1/MP62171-1 Rev.1.0 www.MonolithicPower.com 10/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 10 MP62170-1/MP62171-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH PACKAGE INFORMATION MSOP8 0.114(2.90) 0.122(3.10) 5 8 0.114(2.90) 0.122(3.10) PIN 1 ID (NOTE 5) 0.010(0.25) 0.014(0.35) 0.187(4.75) 0.199(5.05) 4 1 0.0256(0.65)BSC BOTTOM VIEW TOP VIEW GAUGE PLANE 0.010(0.25) 0.030(0.75) 0.037(0.95) 0.043(1.10)MAX SEATING PLANE 0.002(0.05) 0.006(0.15) FRONT VIEW 0o-6o 0.016(0.40) 0.026(0.65) 0.004(0.10) 0.008(0.20) SIDE VIEW NOTE: 0.181(4.60) 0.040(1.00) 0.016(0.40) 1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN BRACKET IS IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURR. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.004" INCHES MAX. 5) PIN 1 IDENTIFICATION HAS HALF OR FULL CIRCLE OPTION. 6) DRAWING MEETS JEDEC MO-187, VARIATION AA. 7) DRAWING IS NOT TO SCALE. 0.0256(0.65)BSC RECOMMENDED LAND PATTERN MP62170-1/MP62171-1 Rev.1.0 www.MonolithicPower.com 10/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 11 MP62170-1/MP62171-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH SOIC8 0.189(4.80) 0.197(5.00) 0.050(1.27) 0.024(0.61) 8 5 0.063(1.60) 0.150(3.80) 0.157(4.00) PIN 1 ID 1 0.228(5.80) 0.244(6.20) 0.213(5.40) 4 TOP VIEW RECOMMENDED LAND PATTERN 0.053(1.35) 0.069(1.75) SEATING PLANE 0.004(0.10) 0.010(0.25) 0.013(0.33) 0.020(0.51) 0.0075(0.19) 0.0098(0.25) SEE DETAIL "A" 0.050(1.27) BSC SIDE VIEW FRONT VIEW 0.010(0.25) x 45o 0.020(0.50) GAUGE PLANE 0.010(0.25) BSC 0o-8o 0.016(0.41) 0.050(1.27) DETAIL "A" NOTE: 1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN BRACKET IS IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.004" INCHES MAX. 5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION AA. 6) DRAWING IS NOT TO SCALE. NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP62170-1/MP62171-1 Rev.1.0 www.MonolithicPower.com 10/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 12