MP62260-1/MP62261-1 3.3V/5V, Single-Channel 2A Current-Limited Power Distribution Switch with Output Discharge The Future of Analog IC Technology DESCRIPTION FEATURES The MP62260-1/MP62261-1 Power Distribution Switch features internal current limiting to prevent damage to host devices due to faulty load conditions. The MP62260-1/MP62261-1 operates from 2.7V to 5.5V nominal input voltage and includes a 45mΩ Power MOSFET to handle up to 2A continuous load with a 3A typical current limit. The MP62260-1/MP622611 has built-in protection for both over current and increased thermal stress. For over-current protection (OCP), the device will limit the current by going into a constant current mode. • • • • • • • • • • • • • When continuous output overload condition exceeds power dissipation of the package, the thermal protection will shut the part off. The device will recover once the device temperature reduces to approx 120°C. The MP62260-1/MP62261-1 involves output discharge function that provides a resistive discharge path for the external output capacitor when the part is disabled. The MP62260-1/MP62261-1 is available in SOIC8 package. 2A Continuous Current 3A Accurate Current Limit Output Discharge Function 2.7V to 5.5V Supply Range 90uA Quiescent Current 45mΩ 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 Package 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 Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION MP62260-1/ MP62261-1 * (*is active high for MP62261-1) MP62260-1/MP62261-1 Rev. 0.9 www.MonolithicPower.com 1/12/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 1 MP62260-1/MP62261-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH WITH OUTPUT DISCHARGE ORDERING INFORMATION Part Number Enable Switch Maximum Continuous Load Current Typical ShortCircuit Current Package @ TA=25°C Top Free Air Marking Temperature (TA) MP62260DS-1* Active Low Single 2A 3A SOIC8 62260DS1 -40°C to +85°C MP62261DS-1 Active High Single 2A 3A SOIC8 62261DS1 -40°C to +85°C * For Tape & Reel, add suffix –Z (eg. MP62260DS-1–Z). For RoHS Compliant Packaging, add suffix –LF (eg. MP62260DS-1–LF–Z) PACKAGE REFERENCE TOP VIEW GND 1 8 OUT IN 2 7 OUT IN 3 6 OUT EN* 4 5 FLAG SOIC8 MP62260-1/MP62261-1 Single-Channel (*is active high for MP62261-1) 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) SOIC8 ........................................................ 1.4W Junction Temperature ...............................150°C Lead Temperature ....................................260°C Storage Temperature............... -65°C to +150°C Operating Junct. Temp (TJ)...... -40°C to +125°C Thermal Resistance (3) θJA θJC SOIC8..................................... 90 ...... 42... °C/W 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. MP62260-1/MP62261-1 Rev. 0.9 www.MonolithicPower.com 1/12/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 2 MP62260-1/MP62261-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH WITH OUTPUT DISCHARGE ELECTRICAL CHARACTERISTICS (4) VIN=5V, TA=+25°C, unless otherwise noted. Parameter Condition IN Voltage Range Min Typ 2.7 Max Units 5.5 V 120 µA Supply Current Device Enabled, IOUT=0 90 Shutdown Current Device Disabled, VOUT=float, VIN=5.5V 1 µA Off Switch Leakage Device Disabled, VIN=5.5V 1 µA Current Limit 2.2 Trip Current Under-voltage Lockout Current Ramp (slew rate≤100A/s) on Output Rising Edge 1.95 Under-voltage Hysteresis FET On Resistance 3 3.8 A 3.3 4.3 A 2.30 2.65 V 250 IOUT=100mA and -40°C≤TA≤85°C EN Input Logic High Voltage 45 mV 70 2 V EN Input Logic Low Voltage FLAG Output Logic Low Voltage ISINK=5mA FLAG Output High Leakage Current VIN=VFLAG=5.5V mΩ 0.8 V 0.4 V 1 µA Thermal Shutdown 140 °C Thermal Shutdown Hysteresis 20 °C VIN=5.5V, CL=1uF, RL=5Ω 0.9 ms VIN=2.7V, CL=1uF, RL=5Ω 1.7 ms VOUT Rising Time, Tr (5) VOUT Falling Time, Tf (6) Turn On Time, Ton (7) Turn Off Time, Toff (8) VIN=5.5V, CL=1uF, RL=5Ω 0.5 ms VIN=2.7V, CL=1uF, RL=5Ω 0.5 ms CL=100µF, RL=5Ω 3 ms CL=100µF, RL=5Ω 10 ms Discharge Resistance 100 FLAG Deglitch Time 4 EN Input Leakage -1 Reverse Leakage Current VOUT=5.5V, VIN=GND 8 Ω 15 ms µA 0.2 µA NOTE: 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. MP62260-1/MP62261-1 Rev. 0.9 www.MonolithicPower.com 1/12/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 3 MP62260-1/MP62261-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH WITH OUTPUT DISCHARGE PIN FUNCTIONS Pin # SOIC8 Name Description 1 GND Ground. 2, 3 IN 4 ——— EN _________ Input Voltage. Accepts 2.7V to 5.5V input. Active Low: (MP62260-1), Active High: (MP62261-1). 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). 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 MP62260-1/MP62261-1 Rev. 0.9 www.MonolithicPower.com 1/12/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 4 MP62260-1/MP62261-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH WITH OUTPUT DISCHARGE TYPICAL PERFORMANCE CHARACTERISTICS VIN=5V, VEN=0V for MP62260-1, VCC=5V, CL=2.2uF, TA=25℃ unless otherwise noted. Turn off Delay vs. Input Votage Turn on Delay vs. Input Votage IO=2A, CL=100uF 1 3 2.5 2 1.5 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) Fall Time vs. Input Votage IO=2A, CL=1uF FALL TIME (us) 110 90 70 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) 0.4 0.2 1 80 70 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) 6 INPUT TO OUTPUT VOLTAGE (mV) 60 50 6 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) 6 Static Drain-Source On-State Resistance Variation vs. Ambient Temperature IO=0.1A 25 20 15 10 5 0 -5 -10 -15 -20 -25 -30 -40 -20 0 Input to Output Voltage vs. Load Current 70 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) 1.1 0.8 2.5 6 90 60 2.5 6 IO=2A 40 2.5 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) 100 Static Drain-Source On-State Resistance vs. Input Voltage 80 1.2 0.9 110 130 50 2.5 0.6 Supply Current, Output Enabled vs. Input Voltage SUPPLY CURRENT (uA) 150 1.3 0.8 0 2.5 6 IO=2A, CL=1uF STATIC DRAIN-SOURCE ON-STATE RESISTANCE VARIATION (%) 3 1.4 20 40 60 80 Current Limit vs. Input Voltage 3.5 160 VIN=2.7V 140 VIN=3.3V VIN=4V 120 100 VIN=5V 80 VIN=5.5V 60 40 CURRENT LIMIT (A) 1 2.5 IO=2A, CL=100uF RISE TIME(ms) TURN OFF DELAY (ms) TURN ON DELAY (ms) 3.5 Rise Time vs. Input Votage 3.3 3.1 2.9 2.7 20 0 0 0.4 0.8 1.2 1.6 OUTPUT CURRENT (A) 2 2.5 2.5 3 3.5 4 4.5 5 5.5 6 INPUT VOLTAGE (V) MP62260-1/MP62261-1 Rev. 0.9 www.MonolithicPower.com 1/12/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 5 MP62260-1/MP62261-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH WITH OUTPUT DISCHARGE TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED) VIN=5V, VEN=0V for MP62260-1, VCC=5V, CL=2.2uF, TA=25℃ unless otherwise noted. Current Limit Response time vs. Peak Current 4 3.8 3.6 3.4 3.2 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) Threshold Trip Current vs. Input Voltage 60 55 50 45 40 35 30 25 20 15 10 5 0 4 6 8 10 12 14 16 18 20 PEAK CURRENT (A) Turn On Delay and Rise Time with 1uF Load Turn Off Delay and Fall Time with 1uF Load IOUT=2A IOUT=2A Turn On Delay and Rise Time with 100uF Load CL=100uF, IOUT=2A VOUT 2V/div VOUT 2V/div VOUT 2V/div EN 2V/div EN 2V/div EN 2V/div 400us/div 400us/div 200us/div Short Circuit Current, Device Enabled into Short Turn Off Delay and Fall Time with 100uF Load Threshold Trip Current with Ramped Load on Enabled Device CL=100uF, IOUT=2A VOUT 2V/div EN 2V/div 400us/div IOUT 1A/div VOUT 2V/div EN 2V/div IOUT 2A/div 400us/div MP62260-1/MP62261-1 Rev. 0.9 www.MonolithicPower.com 1/12/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 4ms/div 6 MP62260-1/MP62261-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH WITH OUTPUT DISCHARGE TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED) VIN=5V, VEN=0V for MP62260-1, VCC=5V, CL=2.2uF, TA=25℃ unless otherwise noted. Inrush Current with Ramped Load on Different Load Capacitance Enabled Device IOUT=2A 470uF Flag 5V/div IOUT 1A/div IOUT 1A/div 220uF 100uF IOUT 1A/div EN 5V/div 2ms/div Flag 5V/div 400us/div 2ms/div Turn Off Delay and Fall Time with Output Discharge VOUT 2V/div EN 2V/div 200us/div MP62260-1/MP62261-1 Rev. 0.9 www.MonolithicPower.com 1/12/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 7 MP62260-1/MP62261-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH WITH OUTPUT DISCHARGE FUNCTION BLOCK DIAGRAM *: EN is active high for MP62261-1 Figure2—Functional Block Diagram MP62260-1/MP62261-1 Rev. 0.9 www.MonolithicPower.com 1/12/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 8 MP62260-1/MP62261-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH WITH OUTPUT DISCHARGE DETAILED DESCRIPTION Over Current When the load exceeds trip current (minimum threshold current triggering constant-current mode) or a short is present, MP622601/MP62261-1 switches into to a constant-current mode (current limit value). MP62260-1/MP622611 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. MP62260-1/MP62261-1 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 MP622601/MP62261-1 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 constant-current mode. 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 over temperature or voltage lockout. 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, and would recover once cooling down to approx 120°C. Under-voltage Lockout (UVLO) This circuit is used to monitor the input voltage to ensure that the MP62260-1/MP62261-1 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 switch to reduce overall supply current. Once the EN pin reaches EN threshold, the MP62260-1/MP62261-1 is enabled. 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. MP62260-1/MP62261-1 Rev. 0.9 www.MonolithicPower.com 1/12/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 9 MP62260-1/MP62261-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH WITH OUTPUT DISCHARGE 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 ripple, placing a high-value electrolytic capacitor on the output pin(s) is recommended when the load is heavy. MP62260-1/MP62261-1 Rev. 0.9 www.MonolithicPower.com 1/12/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 10 MP62260-1/MP62261-1 –CURRENT-LIMITED POWER DISTRIBUTION SWITCH WITH OUTPUT DISCHARGE PACKAGE INFORMATION 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. MP62260-1/MP62261-1 Rev. 0.9 www.MonolithicPower.com 1/12/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 11