MP62340-1/MP62341-1 The Future of Analog IC Technology 3.3V/5V, Dual-Channel 1A Current-Limited Power Distribution Switches with Output Discharge DESCRIPTION FEATURES The MP62340-1/MP62341-1 Power Distribution Switch features internal current limiting to prevent damage to host devices due to faulty load conditions. The MP62340-1/MP62341-1 analog switch has 85mΩ 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 MP623401/MP62341-1 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. 1A Continuous Current Accurate Current Limit Output Discharge Function 2.7V to 5.5V Supply Range 140µA Quiescent Current 85mΩ 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 APPLICATIONS • • • • • • • The MP62340-1/MP62341-1 involves discharge function that provides a resistive discharge path for the external output capacitor when the part is disabled. The MP62340-1/MP62341-1 is available in 8pin MSOP package with exposed pad and SOIC package without exposed pad. PDAs Portable GPS 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 +5V 1 GND 2 IN 3 4 FLAG1 8 7 OUT1 MP62340-1/ MP62341-1 EN1* EN2* OUT2 6 To USB Controller Output 1 Output 2 FLAG2 5 * EN is active high for MP62341-1 MP62340-1/MP62341-1 Rev.0.9 www.MonolithicPower.com 11/2/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 1 MP62340-1/MP62341-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES ORDERING INFORMATION Part Number Enable MP62340DS-1 MP62340DH-1 MP62341DS-1 MP62341DH-1 Active Low Switch Maximum Typical ShortContinuous Circuit Current Load Current @ TA=25C Dual 1A SOIC8 MSOP8E SOIC8 MSOP8E 1.5A Active High Top Marking Package Temperature 62340DS-1 62340DH-1 –40°C to +85°C 62341DS-1 62341DH-1 * For Tape & Reel, add suffix –Z (e.g. MP62340DS-1–Z).For RoHS compliant packaging, add suffix –LF (e.g. MP62340DS-1 -LF–Z) PACKAGE REFERENCE TOP VIEW GND IN EN1* EN2* 1 TOP VIEW 8 2 7 3 6 4 5 FLAG1 GND 1 8 FLAG1 IN 2 7 OUT1 EN1* 3 6 OUT2 EN2* 4 5 FLAG2 θJA θJC OUT1 OUT2 FLAG2 EXPOSED PAD ON BACKSIDE CONNECT TO GND MSOP8E SOIC8 MP62340-1/MP62341-1 Dual-Channel (* EN is active high for MP62341-1) ABSOLUTE MAXIMUM RATINGS (1) IN .................................................-0.3V to +6.0V EN, FLAG, OUT to GND ..............-0.3V to +6.0V Continuous Power Dissipation (TA = +25°C) (2) MSOP8E.................................................... 2.3W SOIC8..................................................... 1.4W Junction Temperature ...............................150°C Lead Temperature ....................................260°C Storage Temperature............... –65°C to +150°C Operating Temperature.............. –40°C to +85°C Thermal Resistance (3) SOIC8..................................... 90 ...... 42... °C/W MSOP8E................................. 55 ...... 12... °C/W Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of themaximum junction temperature TJ (MAX), the junctiontoambient 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. MP62340-1/MP62341-1 Rev.0.9 www.MonolithicPower.com 11/2/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 2 MP62340-1/MP62341-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES ELECTRICAL CHARACTERISTICS (4) VIN=5V, TA=+25°C, unless otherwise noted. Parameter Condition IN Voltage Range Typ Max Units 5.5 V 90 120 µA 140 160 µA 2.7 One Channel Enabled, IOUT=0, One Switch ON Both Channels Enabled, IOUT=0, Both Switches ON Device Disable, VOUT=float, VIN=5.5V Device Disable, VIN=5.5V Supply Current Supply Current Shutdown Current Off Switch Leakage Current Limit 1 1 1.1 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 1.5 2.2 A 1.7 2.4 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 1.95 250 85 IOUT=100mA (-40°C≤TA≤+85°C) µA µA 130 2 ISINK=5mA VIN=VFLAG=5.5V 140 20 0.9 1.7 VIN=5.5V, CL =1µF, RL =5.5Ω VIN=2.7V, CL =1µF, RL =5.5Ω VIN=5.5V, CL =1µF, RL =5.5Ω VIN=2.7V, CL =1µF, RL =5.5Ω CL=100µF, RL=5.5Ω CL=100µF, RL=5.5Ω 100 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. MP62340-1/MP62341-1 Rev.0.9 www.MonolithicPower.com 11/2/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 3 MP62340-1/MP62341-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES PIN FUNCTIONS SOIC8 MSOP8E Name Description GND, Ground. MSOP8E exposed pad must be connected to a pround plane for optional Exposed Pad thermal performance. (MSOP8E) 1 2 IN Input Voltage. Accepts 2.7V to 5.5V input. 3 EN1 Active Low: (MP62340-1), Active High: (MP62341-1) 4 EN2 Active Low: (MP62340-1), Active High: (MP62341-1) 5 FLAG2 IN-to-OUT2 Over-current, active-low output flag. Open-Drain. 6 OUT2 IN-to-OUT2 Power-Distribution Switch Output. 7 OUT1 IN-to-OUT1 Power-Distribution Switch Output 8 FLAG1 IN-to-OUT1 Over-current, active-low output flag. Open-Drain. TYPICAL PERFORMANCE CHARACTERISTICS TA = +25ºC, unless otherwise noted. OUTX RL tf tr CL VO(OUTX) 90% 10% 90% 10% TEST CIRCUIT 50% 50% 50% VI(ENX) 50% VI(ENX) toff ton VO(OUTX) 90% ton VO(OUTX) 10% toff 90% 10% VOLTAGE WAVEFORMS Figure 1—Test Circuit and Voltage Waveforms MP62340-1/MP62341-1 Rev.0.9 www.MonolithicPower.com 11/2/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 4 MP62340-1/MP62341-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES TYPICAL PERFORMANCE CHARACTERISTICS VIN=5V, CL=1µF,Ta=25℃, for only one channel unless otherwise noted. 1.5 1.7 1.6 TURN OFF DELAY (ms) 3 2.5 2 1.5 1.4 1.3 1.2 1.1 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) 1.4 1.3 1.2 1.1 1 0.9 1 2.5 3 1.5 RISE TIME(ms) TURN ON DELAY (ms) 3.5 1 6 2.5 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) 0.8 2.5 6 Supply Current, Output Enable vs. Input Voltage SUPPLY CURRENT (uA) 55 50 45 40 35 30 2.5 3 100 90 80 70 60 3.5 4 4.5 5 5.5 6 INPUT VOLTAGE (V) 120 110 100 90 80 2.5 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) 6 INPUT TO OUTPUT VOLTAGE (mV) STATIC DRAIN-SOURCE ON-STATE IO=1A 130 70 3 3.5 4 4.5 5 5.5 6 INPUT VOLTAGE (V) 25 6 IO=0.1A 20 15 10 5 0 -5 -10 -15 -20 -25 -40 -20 0 20 40 60 80 AMBIENT TEMPERATURE (oC) Input to Output Voltage vs. Load Current Static Drain-Source On-State Resistance vs. Input Voltage 140 2.5 Current Limit vs. Input Voltage 1.8 140 Vin=2.7V 120 CURRENT LIMIT (A) FALL TIME (us) 60 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) Static Drain-Source On-State Resistance Variation vs. Ambient Temperature STATIC DRAIN-SOURCE ON-STATE RESISTANCE VARIATION (%) 110 65 3 Vin=3.3V 100 80 Vin=4V 60 Vin=5V 40 Vin=5.5V 20 1.7 1.6 1.5 1.4 0 0 0.2 0.4 0.6 0.8 OUTPUT CURRENT (A) 1 2.5 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) MP62340-1/MP62341-1 Rev.0.9 www.MonolithicPower.com 11/2/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 6 5 MP62340-1/MP62341-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES TYPICAL PERFORMANCE CHARACTERISTICS(continued) VIN=5V, CL=1µF,Ta=25℃, for only one channel, unless otherwise noted. Current Limit Response Time vs. Peak Current THRESHOLD TRIP CURRENT (A) Threshold Trip Current vs. Input Voltage 2.3 20 2.2 16 2.1 2 12 1.9 1.8 8 1.7 1.6 2.5 4 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) 2 6 VOUT 5V/div VOUT 5V/div EN 5V/div EN 5V/div Flag 5V/div IOUT 1A/div Flag 5V/div IOUT 1A/div 4 6 8 10 12 14 16 18 20 PEAK CURRENT (A) VOUT 2V/div EN 5V/div 100us/div 400us/div Flag 5V/div IOUT 1A/div Short Circuit Current, Device Enabled into Short VOUT 2V/div IOUT 500mA/div EN 5V/div 400us/div Threshold Trip Current with Ramped Load on Enabled Device VOUT 2V/div EN 5V/div Flag 5V/div IOUT 1A/div 400us/div IOUT 1A/div 400us/div MP62340-1/MP62341-1 Rev.0.9 www.MonolithicPower.com 11/2/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 4ms/div 6 MP62340-1/MP62341-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES TYPICAL PERFORMANCE CHARACTERISTICS(continued) VIN=5V, CL=1µF,Ta=25℃, for only one channel, unless otherwise noted. Ramped Load Inrush Current with on Enabled Device Different Load Capacitance IOUT=1A 220uF 470uF Flag 5V/div Flag 2V/div IOUT 500mA/div IOUT 1A/div EN 5V/div 2ms/div 100uF IOUT 1A/div 1ms/div 2ms/div Turn Off Delay and Fall Time with Output Discharge IOUT=0A VOUT 2V/div EN 5V/div Flag 5V/div IOUT 500mA/div 200us/div MP62340-1/MP62341-1 Rev.0.9 www.MonolithicPower.com 11/2/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 7 MP62340-1/MP62341-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES FUNCTION BLOCK DIAGRAM Thermal Sense FLAG1 Deglitch EN1* + Logic AMP -- Charge Pump OUT1 Current Sense UVLO + Vref - IN Current Sense Charge Pump OUT2 -Logic AMP + FLAG2 EN2* Deglitch Thermal Sense GND * EN is active high for MP62341-1 Figure 2—Functional Block Diagram MP62340-1/MP62341-1 Rev.0.9 www.MonolithicPower.com 11/2/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 8 MP62340-1/MP62341-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES DETAILED DESCRIPTION Over Current When the load exceeds trip current (minimum threshold current triggering constant-current mode) or a short is present, MP623401/MP62341-1 switches into to a constant-current mode (current limit value). MP62340-1/MP623411 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. MP62340-1/MP62341-1 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 MP62340-1/ MP62341-1 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 temp. is internally monitored until the thermal limit is reached. Once this temp. 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 MP62340-1/MP62341-1 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. MP62340-1/MP62341-1 Rev.0.9 www.MonolithicPower.com 11/2/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 9 MP62340-1/MP62341-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES APPLICATION INFORMATION Power-Supply Considerations Greater than 10µF capacitor between IN and GND is recommended. This precaution reduces power-supply 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. +5V 1 GND FLAG1 2 IN 3 4 OUT1 MP62340-1/ MP62341-1 EN1* EN2* OUT2 8 To USB Controller 7 6 Output 1 Output 2 FLAG2 5 * EN is active high for MP62341-1 Figure 3—Application Circuit MP62340-1/MP62341-1 Rev.0.9 www.MonolithicPower.com 11/2/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 10 MP62340-1/MP62341-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES PACKAGE INFORMATION MSOP8E (EXPOSED PAD) 0.087(2.20) 0.099(2.50) 0.114(2.90) 0.122(3.10) 5 8 0.114(2.90) 0.122(3.10) PIN 1 ID (NOTE 5) 0.187(4.75) 0.199(5.05) 0.062(1.58) 0.074(1.88) Exposed Pad 0.010(0.25) 0.014(0.35) 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 NOTE: 0.181(4.60) 0.040(1.00) 0.016(0.40) 0.016(0.40) 0.026(0.65) SIDE VIEW 0.100(2.54) 0.075(1.90) 0o-6o 0.004(0.10) 0.008(0.20) 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-T. 7) DRAWING IS NOT TO SCALE. 0.0256(0.65)BSC RECOMMENDED LAND PATTERN MP62340-1/MP62341-1 Rev. 0.9 www.MonolithicPower.com 11/2/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 11 MP62340-1/MP62341-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES SOIC8 0.189(4.80) 0.197(5.00) 8 0.050(1.27) 0.024(0.61) 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. MP62340-1/MP62341-1 Rev.0.9 www.MonolithicPower.com 11/2/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 12