AP2145/AP2155 0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE Description Pin Assignments SO-8 The AP2145 and AP2155 are integrated high-side power switches optimized for Universal Serial Bus (USB) and other hot-swap applications. The family of devices complies with USB 2.0 and available with both polarities of Enable input. They offer current and thermal limiting and short circuit protection as well as controlled rise time and under-voltage lockout functionality. A 7ms deglitch capability on the open-drain Flag output prevents false over-current reporting and does not require any external components. EN 1 8 OUT FLG 2 7 IN GND 3 6 OUT NC 4 5 NC NEW PRODUCT All devices are available in SO-8 and MSOP-8EP packages. Features • • • • • • • • • • • • • • • • Notes: (Top View) Single USB port power switches Over-current and thermal protection 0.8A accurate current limiting Reverse Current Blocking 90mΩ on-resistance Input voltage range: 2.7V – 5.5V 0.6ms typical rise time Very low shutdown current: 1uA (max) Fault report (FLG) with blanking time (7ms typ) ESD protection: 6KV HBM, 400V MM Active high (AP2155) or active low (AP2145) enable Ambient temperature range -40ºC to 85°C SO-8 and MSOP-8EP (Exposed Pad): Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1) UL Recognized, File Number E322375 IEC60950-1 CB Scheme Certified MSOP-8EP EN 1 8 OUT FLG 2 7 IN GND 3 6 OUT NC 4 5 NC (Top View) Applications • • • Consumer electronics – LCD TV & Monitor, Game Machines Communications – Set-Top-Box, GPS, Smartphone Computing – Laptop, Desktop, Servers, Printers, Docking Station, HUB 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. Typical Application Circuit OUT IN Power Supply 2.7V to 5.5V 10k 10uF Load 0.1uF 0.1uF 120uF FLG EN ON GND OFF Available Options Part Number Channel Enable pin (EN) Current limit (typical) Recommended maximum continuous load current AP2145 AP2155 1 1 Active Low Active High 0.8A 0.8A 0.5A 0.5A AP2145/AP2155 Document number: DS32031 Rev. 2 - 2 1 of 13 www.diodes.com September 2010 © Diodes Incorporated AP2145/AP2155 0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE Pin Descriptions NEW PRODUCT Pin Name EN FLG GND NC OUT IN Pin Number 1 2 3 4, 5 6, 8 7 Descriptions Enable input, active low (AP2145) or active high (AP2155) Over-current and over-temperature fault report; open-drain flag is active low when triggered Ground No internal connection Voltage output pin (all OUT pins must be tied together externally) Voltage input pin Functional Block Diagram AP2145, AP2155 IN Current Sense OUT Current Limit FLG UVLO Driver EN Deglitch Thermal Sense GND Absolute Maximum Ratings Symbol Parameter ESD HBM Human Body Model ESD Protection ESD MM VIN Machine Model ESD Protection Input Voltage Ratings Unit 6 KV 400 6.5 VOUT Output Voltage VIN + 0.3 V V V VEN , VFLG Enable Voltage 6.5 V Internal Limited A 150 °C -65 to 150 °C Iload TJmax TST Notes: Maximum Continuous Load Current Maximum Junction Temperature Storage Temperature Range (Note 2) 2. UL Recognized Rating from -30°C to 70°C (Diodes qualified TST from -65°C to 150°C) AP2145/AP2155 Document number: DS32031 Rev. 2 - 2 2 of 13 www.diodes.com September 2010 © Diodes Incorporated AP2145/AP2155 0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE Recommended Operating Conditions Symbol Parameter Input voltage Output Current Operating Ambient Temperature VIN IOUT TA Min Max Unit 2.7 0 -40 5.5 500 85 V mA °C NEW PRODUCT Electrical Characteristics (TA = 25oC, VIN = +5.0V, unless otherwise stated) Symbol Parameter Test Conditions Typ. Max Unit 1.6 1.9 2.5 V VUVLO Input UVLO ISHDN Input Shutdown Current Disabled, OUT = open 0.5 1 μA IQ Input Quiescent Current Enabled, OUT = open 45 70 μA ILEAK Input Leakage Current Disabled, OUT grounded 1 μA IREV Reverse Leakage Current Disabled, VIN= 0V, VOUT= 5V, IREV at VIN 1 MSO-8-EP SO-8 90 95 140 140 mΩ mΩ VIN = 3.3V, IOUT= 0.5A, -40oC≤ TA ≤85oC 120 160 mΩ Short-Circuit Current Limit Enabled into short circuit, CIN=10μF, CL=100μF 0.7 ILIMIT Over-Load Current Limit VIN= 5V, VOUT= 4.5V, CIN=10μF, CL=100μF, 40oC≤ TA ≤85oC ITrig Current limiting trigger threshold RDS(ON) Switch on-resistance ISHORT TSHORT Rload=1kΩ Min VIN = 5V, IOUT= 0.5A, o o 40 C≤ TA ≤85 C EN Input Logic Low Voltage EN Input Logic High Voltage VIN = 2.7V to 5.5V VIN = 2.7V to 5.5V ISINK EN Input leakage VEN = 5V IO-LEAK Output Leakage Current Disabled TD(ON) Output turn-on delay time CL=1μF, Rload=10Ω TR TF 0.6 Output Current Slew rate (<100A/s), CIN=10μF, CL=22μF VOUT = 0V to IOUT = ILIMIT (short applied to output), Short-Circuit Response Time CL=100μF VIL VIH TD(OFF) -1 0.8 μA A 1.0 A 1.0 A 10 μs 0.8 V V 1 μA 2 μA 1 0.05 ms Output turn-on rise time CL=1μF, Rload=10Ω 0.6 Output turn-off delay time CL=1μF, Rload=10Ω 0.01 Output turn-off fall time CL=1μF, Rload=10Ω 0.05 0.1 ms 20 40 Ω 15 ms RFLG FLG output FET on-resistance VIN = 3.3V or 5V, CIN=10μF, IFLG =10mA IFLG 1.5 ms ms μA FLG Leakage Current VFLG = 5V TBlank FLG blanking time VIN = 3.3V or 5V, CIN=10μF, CL=100μF TSHDN Thermal Shutdown Threshold Enabled, Rload=1kΩ 135 °C THYS Thermal Shutdown Hysteresis 25 °C Thermal Resistance Junction- SO-8 (Note 3) to-Ambient MSO-8-EP (Note 4) 110 o C/W 60 o C/W θJA Notes: 1 4 7 3. Test condition for SO-8: Device mounted on FR-4, 2oz copper, with minimum recommended pad layout. 4. Test condition for MSO-8-EP: Device mounted on 2” x 2” FR-4 substrate PC board, 2oz copper, with minimum recommended pad on top layer and thermal vias to bottom layer ground plane. AP2145/AP2155 Document number: DS32031 Rev. 2 - 2 3 of 13 www.diodes.com September 2010 © Diodes Incorporated AP2145/AP2155 0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE Typical Performance Characteristics VEN 50% TD(ON) NEW PRODUCT TD(ON) 90% 10% TD(OFF) TR TF 90% 50% 50% TD(OFF) TR VOUT VEN 50% VOUT 10% TF 90% 10% 90% 10% Figure 1. Voltage Waveforms: AP2145 (left), AP2155 (right) All Enable Plots are for AP2155 Active High Turn-Off Delay and Fall Time Turn-On Delay and Rise Time Ven 5V/div Ven 5V/div Vout 2V/div Vout 2V/div CL=1uF CL=1uF TA=25°C TA=25°C RL=10Ω RL=10Ω 500us/div 500us/div Turn-On Delay and Rise Time Turn-Off Delay and Fall Time Ven 5V/div Ven 5V/div Vout 2V/div Vout 2V/div CL=100uF CL=100uF TA=25°C TA=25°C RL=10Ω 500us/div AP2145/AP2155 Document number: DS32031 Rev. 2 - 2 RL=10Ω 500us/div 4 of 13 www.diodes.com September 2010 © Diodes Incorporated AP2145/AP2155 0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE Typical Performance Characteristics (Continued) Short Circuit Current, Device Enabled Into Short Inrush Current CL=100uF Ven 5V/div NEW PRODUCT Ven 5V/div Iout 200mA/div VIN=5V TA=25°C RL=10Ω Iin 200mA/div VIN=5V TA=25°C CL=470uF CL=220uF CL=100uF 500us/div 1ms/div 3 Ω Load Connected to Enabled Device 2 Ω Load Connected to Enabled Device VIN=5V TA=25°C CL=100uF Vflag 2V/div Iout 500mA/div VIN=5V TA=25°C CL=100uF Vflag 2V/div Iout 500mA/div 2ms/div 2ms/div Short Circuit with Blanking Time and Recovery Power On Vflag 5V/div Vout 5V/div Vflag 5V/div VIN=5V TA=25°C CL=100uF Iout 1A/div TA=25°C CL=100uF RL=10Ω Iout 200mA/div Vin 5V/div Vout 5V/div 50ms/div AP2145/AP2155 Document number: DS32031 Rev. 2 - 2 1ms/div 5 of 13 www.diodes.com September 2010 © Diodes Incorporated AP2145/AP2155 0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE Typical Performance Characteristics (Continued) Device Enabled Power Off TA=25°C CL=100uF RL=10Ω Vflag 5V/div Vflag 5V/div NEW PRODUCT Iout 200mA/div Iout 200mA/div Vin 5V/div Ven 5V/div Vout 5V/div Vout 5V/div TA=25°C CL=100uF RL=10Ω 10ms/div 1ms/div Device Disabled UVLO Increasing Vflag 5V/div TA=25°C CL=100uF RL=10Ω Vin 2V/div TA=25°C CL=100uF RL=10Ω Iout 200mA/div Ven 5V/div Iout 200mA/div Vout 5V/div 1ms/div 1ms/div UVLO Decreasing TA=25°C CL=100uF RL=10Ω Vin 2V/div Iout 200mA/div 10ms/div AP2145/AP2155 Document number: DS32031 Rev. 2 - 2 6 of 13 www.diodes.com September 2010 © Diodes Incorporated AP2145/AP2155 0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE Typical Performance Characteristics (Continued) Turn-Off Time vs Input Voltage 31 700 31 600 Turn-Off Time (us) Turn-On Time (us) 800 500 400 300 200 CL=1uF RL=10Ω TA=25°C 100 30 CL=1uF RL=10Ω TA=25°C 30 29 29 28 28 0 1.5 2 2.5 3 3.5 4 4.5 5 5.5 1.5 6 2 2.5 3 3.5 4 4.5 5 5.5 6 Input Voltage (V) Input Voltage (V) Fall Time vs Input Voltage Rise Time vs Input Voltage 600 25 500 24 400 23 Fall Time (us) Rise Time (us) 300 CL=1uF RL=10Ω TA=25°C 200 22 CL=1uF RL=10Ω TA=25°C 21 20 100 19 0 1.5 2 2.5 3 3.5 4 4.5 5 5.5 1.5 6 2 2.5 3 3.5 4 4.5 5 5.5 6 Input Voltage (V) Input Voltage (V) Supply Current, Output Disabled vs Ambient Temperature 1.60 Vin=5.5V Vin=5.0V Vin=3.3V Supply Current, Output Disabled (uA) NEW PRODUCT Turn-On Time vs Input Voltage Vin=5.5V 1.40 1.20 Vin=5.0V 1.00 0.80 Vin=3.3V 0.60 Vin=2.7V 0.40 0.20 0.00 -45 -25 -5 15 35 55 75 95 Ambient Temperature (°C) AP2145/AP2155 Document number: DS32031 Rev. 2 - 2 7 of 13 www.diodes.com September 2010 © Diodes Incorporated AP2145/AP2155 0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE Typical Performance Characteristics (Continued) Static Drain-Source On-State Resistance vs Ambient Temperature Short-Circuit Output Current vs Ambient Temperature 750 Static Drain-Source On-State Resistance (mΩ) 135 125 115 105 95 85 Vin=5V 75 Vin=3.3V 745 740 735 730 Vin=5V 725 720 65 -60 -40 -20 0 20 40 60 80 -60 100 -40 -20 20 40 60 80 100 Threshold Trip Current vs Input Voltage Undervoltage Lockout vs Ambient Temperature 1.15 2.05 Threshold Trip Current (A) UVLO Rising 2.04 Undervoltage Lockout (V) 0 Ambient Temperature (°C) Ambient Temperature (°C) 2.03 2.02 2.01 2.00 1.99 UVLO Falling 1.98 1.97 1.14 1.13 1.12 TA=25°C CL=22uF 1.11 1.96 1.10 1.95 -60 -40 -20 0 20 40 60 80 100 2.8 3.3 3.8 4.3 4.8 5.3 Input Voltage (V) Ambient Temperature (°C) Current Limit Response vs Peak Current 45 40 Current Limit Response (us) NEW PRODUCT Short-Circuit Output Current (A) Vin=3.3V 145 35 30 VIN=5V 25 TA=25°C 20 CL=22uF 15 10 5 0 2 3 4 5 6 7 8 9 10 Peak Current (A) AP2145/AP2155 Document number: DS32031 Rev. 2 - 2 8 of 13 www.diodes.com September 2010 © Diodes Incorporated AP2145/AP2155 0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE Application Note NEW PRODUCT Power Supply Considerations A 0.1-μF to 1-μF X7R or X5R ceramic bypass capacitor between IN and GND, close to the device, is recommended. Placing a high-value electrolytic capacitor on the input and output pin(s) is recommended when the output load is heavy. This precaution reduces powersupply transients that may cause ringing on the input. Additionally, bypassing the output with a 0.01-μF to 0.1-μF ceramic capacitor improves the immunity of the device to short-circuit transients. Over-current and Short Circuit Protection An internal sensing FET is employed to check for overcurrent conditions. Unlike current-sense resistors, sense FETs do not increase the series resistance of the current path. When an overcurrent condition is detected, the device maintains a constant output current and reduces the output voltage accordingly. Complete shutdown occurs only if the fault stays long enough to activate thermal limiting. extremely low temperature operation. A recommended capacitor should have temperature characteristics of less than 10% variation of capacitance change when operated at extremely low temp. Our recommended aluminum electrolytic capacitor type is Panasonic FC series. FLG Response When an over-current or over-temperature shutdown condition is encountered, the FLG open-drain output goes active low after a nominal 7-ms deglitch timeout. The FLG output remains low until both over-current and over-temperature conditions are removed. Connecting a heavy capacitive load to the output of the device can cause a momentary over-current condition, which does not trigger the FLG due to the 7-ms deglitch timeout. The AP2145/AP2155 is designed to eliminate false overcurrent reporting without the need of external components to remove unwanted pulses. Power Dissipation and Junction Temperature Three possible overload conditions can occur. In the first condition, the output has been shorted to GND before the device is enabled or before VIN has been applied. The AP2145/AP2155 senses the short circuit and immediately clamps output current to a certain safe level namely ILIMIT. The low on-resistance of the internal MOSFET allows the small surface-mount packages to pass large current. Using the maximum operating ambient temperature (TA) and RDS(ON), the power dissipation can be calculated by: 2 PD = RDS(ON)× I In the second condition, an output short or an overload occurs while the device is enabled. At the instance the overload occurs, higher current may flow for a very short period of time before the current limit function can react. After the current limit function has tripped (reached the over-current trip threshold), the device switches into current limiting mode and the current is clamped at ILIMIT. Finally, calculate the junction temperature: TJ = PD x RθJA + TA Where: TA= Ambient temperature °C RθJA = Thermal resistance PD = Total power dissipation Thermal Protection In the third condition, the load has been gradually increased beyond the recommended operating current. The current is permitted to rise until the current-limit threshold (ITRIG) is reached or until the thermal limit of the device is exceeded. The AP2145/AP2155 is capable of delivering current up to the current-limit threshold without damaging the device. Once the threshold has been reached, the device switches into its current limiting mode and is set at ILIMIT. To protect against short circuit to GND at extremely low temperature (< -30oC), a minimum 120-μF electrolytic capacitor on the output pin is recommended. A correct capacitor type with capacitor voltage rating and temperature characteristics must be properly chosen so that capacitance value does not drop too low at the AP2145/AP2155 Document number: DS32031 Rev. 2 - 2 Thermal protection prevents the IC from damage when heavy-overload or short-circuit faults are present for extended periods of time. The AP2145/AP2155 implements a thermal sensing to monitor the operating junction temperature of the power distribution switch. Once the die temperature rises to approximately 140°C due to excessive power dissipation in an over-current or short-circuit condition the internal thermal sense circuitry turns the power switch off, thus preventing the power switch from damage. Hysteresis is built into the thermal sense circuit allowing the device to cool down approximately 25°C before the switch turns back on. The switch continues to cycle in this manner until the load fault or input power is removed. The FLG open-drain output is asserted when an over-temperature shutdown or over-current occurs with 7-ms deglitch. 9 of 13 www.diodes.com September 2010 © Diodes Incorporated AP2145/AP2155 0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE Application Note (Continued) Under-voltage Lockout (UVLO) NEW PRODUCT Under-voltage lockout function (UVLO) keeps the internal power switch from being turned on until the power supply has reached at least 1.9V, even if the switch is enabled. Whenever the input voltage falls below approximately 1.9V, the power switch is quickly turned off. This facilitates the design of hot-insertion systems where it is not possible to turn off the power switch before input power is removed. Generic Hot-Plug Applications In many applications it may be necessary to remove modules or pc boards while the main unit is still operating. These are considered hot-plug applications. Such implementations require the control of current surges seen by the main power supply and the card being inserted. The most effective way to control these surges is to limit and slowly ramp the current and voltage being applied to the card, similar to the way in which a power supply normally turns on. Due to the controlled rise times and fall times of the AP2145/AP2155, these devices can be used to provide a softer start-up to devices being hot-plugged into a powered system. The UVLO feature of the AP2145/AP2155 also ensures that the switch is off after the card has been removed, and that the switch is off during the next insertion. By placing the AP2145/AP2155 between the VCC input and the rest of the circuitry, the input power reaches these devices first after insertion. The typical rise time of the switch is approximately 1ms, providing a slow voltage ramp at the output of the device. This implementation controls system surge current and provides a hot-plugging mechanism for any device. Ordering Information AP 21 X 5 XX G - 13 Channel Package Green Packing 5 : 1 Channel S : SO-8 MP : MSOP-8EP G : Green 13 : Tape & Reel Enable 4 : Active Low 5 : Active High Device AP21X5SG-13 AP21X5MPG-13 Notes: Package Code S MP Packaging (Note 5) SO-8 MSOP-8EP 13” Tape and Reel Quantity Part Number Suffix 2500/Tape & Reel -13 2500/Tape & Reel -13 5. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. AP2145/AP2155 Document number: DS32031 Rev. 2 - 2 10 of 13 www.diodes.com September 2010 © Diodes Incorporated AP2145/AP2155 0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE Marking Information (1) SO-8 ( Top view ) 8 7 6 5 NEW PRODUCT Logo Part Number 4 : Active Low 5 : Active High 5 : 1 Channel G : Green YY : Year : 08, 09,10~ WW : Week : 01~52; 52 represents 52 and 53 week X : Internal Code AP21X X YY WW X X 2 1 3 4 (2) MSOP-8EP ( Top view ) 8 7 Logo AP21X X 1 Document number: DS32031 Rev. 2 - 2 5 YWXE Part Number 4 : Active Low 5 : Active High AP2145/AP2155 6 2 3 A~Z : Green MSOP-8L-EP Y : Year : 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week 5 : 1 Channel 4 11 of 13 www.diodes.com September 2010 © Diodes Incorporated AP2145/AP2155 0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE Package Outline Dimensions (All Dimensions in mm) 0.254 0.10/0.20 3.85/3.95 5.90/6.10 (1) Package type: SO-8 Gauge Plane Seating Plane 0.62/0.82 7°~9° 7°~9° 0.15/0.25 1.30/1.50 1.75max. 0.35max. 45° Detail "A" 0°/8° 0.3/0.5 1.27typ 4.85/4.95 5.4 8x-0.60 6x-1.27 8x-1.55 Land Pattern Recommendation (Unit: mm) (2) Package type: MSOP-8EP EXPOSED PAD (BOTTOM) 4.4 4.7/5.1 2.9/3.1 8x-0.45 8x-1.4 6x-0.65 1 Land Pattern Recommendation (Unit:mm) "A" 1 0.25 0.05 2.9/3.1 Gauge plane 0.4/0.8 ° 0.05/0.15 EXPOSED PAD (BOTTOM) 0.95Ref. 0 °/ 8 1.10Max. 0.15Typ. 0.22/0.38 0.75/0.95 1 0.65Bsc. 1.35/1.65 NEW PRODUCT Detail "A" DETAIL "A" 1.65/1.95 AP2145/AP2155 Document number: DS32031 Rev. 2 - 2 12 of 13 www.diodes.com September 2010 © Diodes Incorporated AP2145/AP2155 0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 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Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. 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