Power Management Switch ICs for PCs and Digital Consumer Products 1ch High Side Switch ICs for USB Devices and Memory Cards BD2041AFJ,BD2051AFJ,BD6519FJ No.11029EBT03 ●Description Single channel high side switch IC for USB port is a high side switch having over current protection used in power supply line of universal serial bus (USB). N-channel power MOSFET of low on resistance and low supply current are realized in this IC. And, over current detection circuit, thermal shutdown circuit, under voltage lockout and soft start circuit are built in. ●Features 1) Built-in low on resistance Nch MOS FET Switch. Typ = 80mΩ (BD2041AF/BD2051AFJ) Typ = 100mΩ (BD6519FJ) 2) Continuous current load 0.5A 3) Control input logic Active-Low : BD2041AFJ/ BD6519FJ Active-High : BD2051AFJ 4) Soft start circuit 5) Over current detection 6) Thermal shutdown 7) Under voltage lockout 8) Open drain error flag output 9) Reverse-current protection when power switch off 10) Power supply voltage range 2.7V~5.5V (BD2041AF/BD2051AFJ) 3.0V~5.5V (BD6519FJ) 11) Operating temperature range -40°C~85°C ●Applications USB hub in consumer appliances, Car accessory, PC, PC peripheral equipment, and so forth ●Lineup Parameter Continuous current load (A) Output current at short (A) Control input logic ●Absolute Maximum Ratings Parameter Supply voltage Enable voltage /OC voltage /OC current OUT voltage Storage temperature Power dissipation BD2041AFJ 0.5 1.0 Low Symbol VIN VEN, V/EN V/OC IS/OC VOUT TSTG PD BD2051AFJ 0.5 1.0 High Limits -0.3 to 6.0 -0.3 to 6.0 -0.3 to 6.0 10 -0.3 to 6.0 -55 to 150 560*1 BD6519FJ 0.5 1.1 Low Unit V V V mA V °C mW *1 In the case of exceeding Ta = 25°C, 4.48mW should be reduced per 1°C. * This chip is not designed to protect itself against radioactive rays. ※ IN, EN (/EN), and /OC terminal of BD2041AFJ/BD2051AFJ correspond to VDD, CTRL, and FLAG terminal of BD6519FJ, respectively. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 1/18 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ ●Operating conditions ◎BD2041AF/BD2051AFJ Parameter Operating voltage Operating temperature Continuous output current Symbol VIN TOPR ILO Limits 2.7 to 5.5 -40 to 85 0 to 500 Unit V °C mA ◎BD6519FJ Parameter Operating voltage Operating temperature Continuous output current Symbol VIN TOPR ILO Limits 3.0 to 5.5 -40 to 85 0 to 500 Unit V °C mA ●Electrical characteristics ◎BD2041AFJ (Unless otherwise specified, VIN = 5.0V, Ta = 25°C) Limits Parameter Symbol Min. Typ. Operating Current IDD 90 Standby Current ISTB 0.01 V/EN 2.0 /EN input voltage V/EN /EN input current I/EN -1.0 0.01 /OC output LOW voltage V/OC /OC output leak current IL/OC 0.01 ON resistance RON 80 Output current at short Output rise time Output turn on time Output fall time Output turn off time UVLO threshold Max. 120 1 0.8 0.4 1.0 0.5 1 100 Unit μA μA V V V μA V μA mΩ ISC 0.7 1.0 1.3 A TON1 TON2 TOFF1 TOFF2 VTUVH VTUVL 2.1 2.0 1.2 1.5 1 3 2.3 2.2 10 20 20 40 2.5 2.4 ms ms μs μs V V (Unless otherwise specified, VDD = 5.0V, Ta = 25°C) Limits Parameter Symbol Min. Typ. 90 Operating Current IDD Standby Current 0.01 2.5 CTRL input voltage VCTRL CTRL input voltage ICTRL -1.0 0.01 FLAG output resistance RFLAG 180 FLAG output leak current ILFLAG 0.01 FLAG output delay TDFLAG 2.5 100 ON resistance RON 140 Short circuit output current ISC 0.6 Output leak current ILEAK Output rise time TON1 1 Output turn on delay time TON2 1.3 Output fall time TOFF1 1 Output turn off delay time TOFF2 3 Thermal shutdown threshold TTS 135 VTUVH 2.3 2.5 UVLO threshold VTUVL 2.1 2.3 Condition V/EN = 0V, OUT = OPEN V/EN = 5V, OUT = OPEN High input Low input Low input 2.7V≤ VIN ≤4.5V V/EN = 0V or V/EN = 5V I/OC = 5mA V/OC = 5V IOUT = 500mA VIN = 5V, VOUT = 0V, CL = 100μF (RMS) RL = 10Ω , CL = OPEN Increasing VIN Decreasing VIN ◎BD6519FJ www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 2/18 Max. 140 2 0.7 1.0 450 1 8 140 180 1.6 10 4 6 20 20 2.7 2.5 Unit μA μA V V μA Ω μA ms mΩ mΩ A μA ms ms μs μs °C V V Condition VCTRL= 0V, OUT = OPEN VCTRL= 5V, OUT = OPEN High input Low input VCTRL = 0V or VCTRL = 5V IFLAG = 1mA VFLAG = 5V VDD = 5V, IOUT = 500mA VDD = 3.3V, IOUT = 500mA VDD = 5V , VOUT = 0V VCTRL = 5V RL = 10Ω , CL = OPEN Tj increase VDD increasing VDD decreasing 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ (Unless otherwise specified, VIN = 5.0V, Ta = 25°C) Limits Parameter Symbol Min. Typ. Operating Current IDD 90 Standby Current ISTB 0.01 VEN 2.0 EN input voltage VEN EN input current IEN -1.0 0.01 /OC output LOW voltage V/OC /OC output leak current IL/OC 0.01 ON resistance RON 80 ◎BD2051AFJ Output current at short Output rise time Output turn on time Output fall time Output turn off time UVLO threshold www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. Max. 120 1 0.8 0.4 1.0 0.5 1 100 Unit μA μA V V V μA V μA mΩ ISC 0.7 1.0 1.3 A TON1 TON2 TOFF1 TOFF2 VTUVH VTUVL 2.1 2.0 1.2 1.5 1 3 2.3 2.2 10 20 20 40 2.5 2.4 ms ms μs μs V V 3/18 Condition VEN = 5V, OUT = OPEN VEN = 0V, OUT = OPEN High input Low input Low input 2.7V≤ VIN ≤4.5V VEN = 0V or VEN = 5V I/OC = 5mA V/OC = 5V IOUT = 500mA VIN = 5V, VOUT = 0V, CL = 100μF (RMS) RL = 10Ω , CL = OPEN Increasing VIN Decreasing VIN 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ ●Measurement circuit VIN VIN A 1uF 1uF GND OUT OUT IN OUT IN OUT IN OUT EN(/EN) /OC EN(/EN) /OC GND OUT IN RL CL VEN (V/EN ) VEN (V/EN ) Operating current VIN EN, /EN input voltage, Output rise, fall time VIN VIN 10k 1uF VIN 1uF I/OC GND OUT GND OUT IN OUT IN OUT IN OUT IN OUT EN(/EN) /OC EN(/EN) /OC IOUT CL VEN (V/EN ) VEN (V/EN ) ON resistance, Over current detection /OC output LOW voltage Fig.1 Measurement circuit ●Timing diagram ◎BD2041AFJ/BD6519FJ ◎BD2051AFJ TOFF1 TOFF1 TON1 VOUT TON1 90% 10% 90% VOUT 90% 10% 10% 90% 10% TOFF2 TOFF2 TON2 TON2 V/EN VEN 50% 50% 50% Fig.2 Timing diagram 50% Fig.3 Timing diagram ※IN, EN (/EN), and /OC terminal of BD2041AFJ/BD2051AFJ correspond to VDD, CTRL, and FLAG terminal of BD6519FJ, respectively. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 4/18 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ ●Reference data (BD2041AFJ/BD2051AFJ) 120 1.0 120 Ta=25°C 100 80 60 40 20 3 4 5 SUPPLY VOLTAGE : VIN [V] 80 0.6 60 0.4 40 0.2 20 0 -50 0 2 0.8 OPERATING CURRENT : ISTB [μA] OPERATING CURRENT : IDD [μA] 6 1.0 VIN=5.0V 0.4 0.2 0.0 ENABLE INPUT VOLTAGE : VEN, V/EN[V] ENABLE INPUT VOLTAGE : VEN, V /EN[V] 0 0.6 1.5 1.5 Low to High High to Low 1.0 High to Low 0.5 0.0 0.0 2 3 4 5 SUPPLY VOLTAGE : VIN [V] -50 6 0.5 0.2 0.1 0.4 ON RESISTANCE : R ON[mΩ] 0.3 Ta=25°C VIN=5.0V /OC OUTPUT LOW VOLTAGE : V/OC[V] 0.4 0.3 0.2 0.1 150 100 0.0 0.0 3 4 5 SUPPLY VOLTAGE : VIN [V] Fig.10 /OC output LOW voltage 200 0 50 100 AMBIENT TEMPERATURE : Ta[℃] 2 Fig.11 /OC output LOW voltage 0 -50 SHORT CIRCUIT CURRENT : ISC[A] Ta=25°C 1.0 50 0.5 Fig.13 ON resistance www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. VIN=5.0V 1.5 1.0 0.5 0.0 0.0 0 50 100 AMBIENT TEMPERATURE : Ta[℃] 6 2.0 1.5 100 3 4 5 SUPPLY VOLTAGE : VIN [V] Fig.12 ON resistance 2.0 VIN=5.0V 150 50 0 -50 6 100 200 0.5 Ta=25°C 0 50 AMBIENT TEMPERATURE : Ta[℃] Fig.9 EN,/EN input voltage Fig.8 EN,/EN input voltage Fig.7 Operating current EN,/EN Disable 2 Low to High 1.0 0.5 0 50 100 AMBIENT TEMPERATURE : Ta[℃] 6 2.0 Ta=25°C 0.8 -50 3 4 5 SUPPLY VOLTAGE : VIN [V] Fig.6 Operating current EN,/EN Disable 2.0 VIN=5.0V OPERATING CURRENT : ISTB [μA] 2 Fig.5 Operating current EN,/EN Enable Fig.4 Operating current EN,/EN Enable /OC OUTPUT LOW VOLTAGE : V/OC[V] 0.0 0 50 100 AMBIENT TEMPERATURE : Ta[℃] SHORT CIRCUIT CURRENT : ISC[A] OPERATING CURRENT : IDD [μA] 100 ON RESISTANCE : R ON [mΩ] Ta=25°C VIN=5.0V 2 3 4 5 SUPPLY VOLTAGE : VIN [V] 6 Fig.14 Output current at shortcircuit (BD2041AFJ/51AFJ) 5/18 -50 0 50 100 AMBIENT TEMPERATURE : Ta[℃] Fig.15 Output current at shortcircuit (BD2041AFJ/51AFJ) 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ 5.0 5.0 5.0 4.0 3.0 2.0 1.0 TURN ON TIME : TON2 [ms] 4.0 RISE TIME : TON1 [ms] 3.0 3.0 2.0 2.0 1.0 0.0 2 3 4 5 SUPPLY VOLTAGE : VIN [V] 1.0 0.0 -50 6 0.0 Fig.17 Output rise time Fig.16 Output rise time 3.0 2.0 VIN=5.0V 4.0 4.0 3.0 3.0 FALL TIME : TOFF1 [µs] FALL TIME : T OFF1 [μs] TURN ON TIME : TON2 [ms] 4.0 2.0 2.0 1.0 1.0 1.0 0.0 0.0 2 0 50 100 AMBIENT TEMPERATURE : Ta[℃] 3 4 5 SUPPLY VOLTAGE : VIN [V] VIN=5.0V 4.0 TURN OFF TIME : TOFF2 [μs] 1.0 3 4 5 SUPPLY VOLTAGE : VIN[V] 6 Fig.22 Output turn off time VUVLOL 2.2 2.0 2.1 2.0 0.0 2 VUVLOH 2.3 3.0 1.0 0.0 Fig.21 Output fall time 2.4 4.0 2.0 0 50 100 AMBIENT TEMPERATURE : Ta[℃] 2.5 5.0 Ta=25°C 3.0 -50 6 Fig.20 Output fall time Fig.19 Output turn on time 5.0 6 5.0 Ta=25°C VIN=5.0V 3 4 5 SUPPLY VOLTAGE : VIN [V] Fig.18 Output turn on time 5.0 5.0 0.0 -50 2 0 50 100 AMBIENT TEMPERATURE : Ta[℃] UVLO THRESHOLD VOLTAGE : VUVLOH, V UVLOL[V] RISE TIME : TON1 [ms] 4.0 TURN OFF TIME : TOFF2[μs] Ta=25°C VIN=5.0V Ta=25°C -50 0 50 100 AMBIENT TEMPERATURE : Ta[℃] Fig.23 Output turn off time -50 0 50 100 AMBIENT TEMPERATURE : Ta[℃] Fig.24 UVLO threshold voltage UVLO HYSTERESIS VOLTAGE : VHYS[V] 1.0 0.8 0.6 0.4 0.2 0.0 -50 0 50 100 AMBIENT TEMPERATURE : Ta[℃] Fig.25 UVLO hysteresis voltage www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 6/18 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ ●Waveform data (BD2041AFJ/BD2051AFJ) V/EN (5V/div.) V/EN (5V/div.) V/OC (5V/div.) V/OC (5V/div.) VOUT (5V/div.) VOUT (5V/div.) IOUT (0.5A/div.) VIN=5V RL=10Ω CL=100μF V/EN (1V/div.) VIN=5V RL=10Ω CL=100μF IOUT (0.5A/div.) IOUT (0.2A/div.) V/OC (1V/div.) 220μF 147μF 330μF 47μF VIN=5V RL=10Ω TIME(1ms/div.) TIME(1ms/div.) TIME(0.5ms/div.) Fig.26 Output rise characteristic (BD2041AFJ) Fig.27 Output fall characteristic (BD2041AFJ) Fig.28 Inush current (BD2041AFJ) V/OC (5V/div.) V/OC (5V/div.) VOUT (5V/div.) VOUT (5V/div.) IOUT (0.5A/div.) VIN=5V IOUT (0.5A/div.) VIN=5V TIME(20ms/div.) TIME(2ms/div.) Fig.29 Over current response Ramped load (BD2041AFJ) Fig.30 Over current response Ramped load (BD2041AFJ) V/EN (5V/div.) V/OC (5V/div.) V/OC (5V/div.) V/OC (5V/div.) VOUT (5V/div.) VOUT (5V/div.) VOUT (5V/div.) Thermal Shutdown IOUT (0.5A/div.) VIN=5V CL=100μF IOUT (1A/div.) VIN=5V CL=100μF TIME (2ms/div.) TIME (2ms/div.) Fig.31 Over current response Enable to shortcircuit (BD2041AFJ) Fig.32 Over current response Output shortcircuit at Enable (BD2041AFJ) VIN (5V/div.) VIN (5V/div.) VOUT (5V/div.) VOUT (5V/div.) IOUT (0.5A/div.) IOUT (0.5A/div.) V/OC (5V/div.) RL=10Ω CL=147μF V/OC (5V/div.) VIN=5V CL=100μF IOUT (0.5A/div.) TIME (500ms/div.) Fig.33 Over current response Output shortcircuit at Enable (BD2041AFJ) RL=10Ω CL=147μF TIME (10ms/div.) TIME (10ms/div.) Fig.34 UVLO VDD increasing (BD2041AFJ) Fig.35 UVLO VDD decreasing (BD2041AFJ) Regarding the output rise/fall and over current detection characteristics of BD2051AFJ, refer to the characteristic of BD2041AFJ. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 7/18 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ ●Reference data (BD6519FJ) 120 120 1.0 Ta=25°C VDD=5.0V 60 40 2 3 4 5 SUPPLY VOLTAGE : VDD [V] 80 60 40 20 0 -50 0 6 0.2 0.0 2 0.6 0.4 0.2 VDD=5.0V 2.0 2.0 Low to High 1.5 Low to High 1.5 High to Low 1.0 High to Low 1.0 0.5 0.5 0.0 0.0 0.0 2 0 50 100 AMBIENT TEMPERATURE : Ta[℃] 3 4 5 SUPPLY VOLTAGE : VDD [V] 6 -50 0 50 100 AM BIENT TEM PERATURE : Ta[℃ ] Fig.41 CTRL input voltage Fig.40 CTRL input voltage Fig.39 Operating current CTRL Disable 250 FLAG OUTPUT RESISTANCE : R FLAG[Ω] Ta=25°C 200 150 100 50 200 Ta=25°C VDD=5.0V 200 ON RESISTANCE : RON[mΩ] 250 150 100 150 100 50 50 0 0 0 3 4 5 SUPPLY VOLTAGE : VDD [V] 6 -50 Fig.42 FLAG output resistance 0 -50 SHORT CIRCUIT CURRENT : ISC[A] SHORT CIRCUIT CURRENT : ISC[A] 1.0 0.5 0.5 0.0 0.0 0 50 100 AMBIENT TEMPERATURE : Ta[℃] Fig.45 ON resistance www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. VDD=5.0V 1.5 1.0 50 6 2.0 Ta=25°C 1.5 100 3 4 5 SUPPLY VOLTAGE : VDD [V] Fig.44 ON resistance Fig.43 FLAG output resistance VDD=5.0V 150 2 0 50 100 AMBIENT TEMPERATURE : Ta[℃] 2.0 200 6 2.5 ENABLE INPUT VOLTAGE : VCTRL [V] ENABLE INPUT VOLTAGE : VCTRL [V] 0 0.8 2 3 4 5 SUPPLY VOLTAGE : VDD [V] Fig.38 Operating current CTRL Disable Ta=25°C VDD=5.0V OPERATING CURRENT : ISTB [μA] 0.4 0 50 100 AMBIENT TEMPERATURE : Ta[℃] 2.5 1.0 FLAG OUTPUT RESISTANCE : R FLAG[Ω] 0.6 Fig.37 Operating current CTRL Enable Fig.36 Operating current CTRL Enable -50 0.8 OPERATING CURRENT : ISTB[μA] 80 20 ON RESISTANCE : RON [mΩ] Ta=25°C 100 OPERATING CURRENT : IDD [μA] OPERATING CURRENT : IDD [μA] 100 2 3 4 5 SUPPLY VOLTAGE : VDD [V] 6 Fig.46 Output current at shortcircuit 8/18 -50 0 50 100 AMBIENT TEMPERATURE : Ta[℃] Fig.47 Output current at shortcircuit 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ 3.0 2.0 1.0 4.0 4.0 3.0 3.0 2.0 2.0 1.0 0.0 1.0 0.0 2 3 4 5 6 -50 SUPPLY VOLTAGE : VDD[ V] Fig.48 FLAG output delay VDD=5.0V 4.0 2.0 1.0 TURN ON TIME : TON2 [ms] TURN ON TIME : TON2 [ms] 3.0 3.0 3.0 2.0 2.0 1.0 1.0 0.0 -50 0.0 0 50 100 AMBIENT TEMPERATURE : Ta[℃] 2 3 4 5 SUPPLY VOLTAGE : VDD [V] 6 5.0 2.0 1.0 Ta=25°C 4.0 TURN OFF TIME : TOFF2 [μs] 3.0 FALL TIME : T OFF1[μs] 3.0 2.0 1.0 0.0 6 Fig.54 Output fall time 4.0 3.0 2.0 1.0 0.0 UVLO THRESHOLD VOLTAGE : VTUVH , VTUVL[V] VDD=5.0V 0 50 100 AMBIENT TEMPERATURE : Ta[℃] 1.0 2.6 0.8 2.5 VTUVH 2.4 VTUVL 2.3 2.2 0 50 100 AMBIENT TEMPERATURE : Ta[℃] Fig.57 Output turn off delay time www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. -50 0 50 100 AMBIENT TEMPERATURE : Ta[℃] Fig.58 UVLO threshold voltage 9/18 3 4 5 SUPPLY VOLTAGE : VDD [V] 6 Fig.56 Output turn off delay time 2.7 2.1 -50 2 Fig.55 Output fall time 5.0 2.0 0.0 -50 UVLO HYSTERESIS VOLTAGE : VHYS[V] 3 4 5 SUPPLY VOLTAGE : VDD [V] 3.0 1.0 0.0 2 100 5.0 VDD=5.0V 4.0 50 Fig.53 Output turn on delay time 5.0 Ta=25°C 4.0 0 AMBIENT TEMPERATURE : Ta[℃] Fig.52 Output turn on delay time Fig.51 Output rise time 6 5.0 4.0 0.0 -50 3 4 5 SUPPLY VOLTAGE : VDD [V] Fig.50 Output rise time Ta=25°C 4.0 RISE TIME : TON1 [ms] 2 5.0 VDD=5.0V FALL TIME : T OFF1 [μs] 0.0 0 50 100 AMBIENT TEMPERATURE : Ta[℃] Fig.49 FLAG output delay 5.0 TURN OFF TIME : TOFF2 [μs] Ta=25°C VDD=5.0V RISE TIME : T ON1 [ms] Ta=25°C FLAG OUTPUT DELAY : TDFLAG[ms] FLAG OUTPUT DELAY : TDFLAG [ ms] 4.0 5.0 5.0 5.0 0.6 0.4 0.2 0.0 -50 0 50 100 AMBIENT TEMPERATURE : Ta[℃] Fig.59 UVLO hysteresis voltage 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ ●Waveform data (BD6519FJ) VDD=5V RL=10Ω CL=147μF VCTRL (1V/div.) VCTRL (1V/div.) VDD=5V RL=10Ω CL=147μF VOUT (1V/div.) VOUT (1V/div.) CL=330μF CL=220μF CL=147μF CL=47μF VFLAG (5V/div.) VFLAG (1V/div.) VFLAG (1V/div.) VDD=5V RL=10Ω IOUT (0.2A/div.) IOUT (0.2A/div.) IOUT (0.2A/div.) VCTRL (5V/div.) TIME(1ms/div.) TIME(1ms/div.) TIME(0.5ms/div.) Fig.60 Output rise characteristic Fig.61 Output fall characteristic Fig.62 Inrush current characteristic VOUT (1V/div.) VOUT (1V/div.) IOUT (0.2A/div.) IOUT (0.2A/div.) VFLAG (1V/div.) VDD=5V VFLAG (1V/div.) VDD=5V TIME(20ms/div.) TIME(2ms/div.) Fig.63 Over current response Ramped load Fig.64 Over current response Ramped load VCTRL (1V/div.) VOUT (1V/div.) VDD=5V CL=100μF VOUT (1V/div.) VOUT (1V/div.) Thermal Shutdown IOUT (0.5A/div.) IOUT (0.2A/div.) VDD=5V CL=100μF VFLAG (1V/div.) IOUT (0.5A/div.) VFLAG (1V/div.) VDD=5V CL=100μF VFLAG (1V/div.) TIME (1ms/div.) TIME (1ms/div.) TIME (200ms/div.) Fig.65 Over current response Enable to shortcircuit Fig.66 Over current response Output shortcircuit at Enable Fig.67 Over current response Output shortcircuit at Enable VDD (1V/div.) VDD (1V/div.) VOUT (1V/div.) VOUT (1V/div.) IOUT (0.2A/div.) IOUT (0.2A/div.) VFLAG (1V/div.) RL=10Ω CL=147μF RL=10Ω CL=147μF VFLAG (1V/div.) TIME (10ms/div.) TIME (10ms/div.) Fig.68 UVLO VIN increasing Fig.69 UVLO VIN decreasing . www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 10/18 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ ●Block diagram (BD2041AFJ/2051AFJ) GND OUT IN Charge pump UVLO IN OCD OUT Gate logic EN(/EN) OUT Fig.70 Block diagram 5 /OC O 6, 7, 8 OUT O OUT 4 5 /OC EN(/EN) Pin function Ground. Error flag output. Low at over current, thermal shutdown. Open drain output. Power switch output. At use, connect each pin outside. Pin No EN(/EN) 4 /OC 5 OUT 6,7,8 www.rohm.com 6 Enable input. Power switch on at Low level. (BD2041AFJ) Power switch on at High level. (BD2051AFJ) High level input > 2.0V, Low level input < 0.8V. I © 2011 ROHM Co., Ltd. All rights reserved. 3 IN Top View I EN (/EN) (BD2041AFJ/2051AFJ) Symbol OUT 2 Power supply input. Input terminal to the power switch and power supply input terminal of the internal circuit. At use, connect each pin outside. 4 ●I/O circuit 7 IN Fig.71 Pin Configuration ●Pin description (BD2041AFJ/2051AFJ) Pin No. Symbol I/O 1 GND I IN OUT 1 /OC TSD 2, 3 8 GND Equivalent circuit 11/18 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ ●Block diagram (BD6519FJ) GND OUT VDD UVLO VDD Charge pump OUT OCD OUT Gate logic CTRL 8 OUT 7 OUT 3 6 OUT 4 5 FLAG GND 1 VDD 2 VDD CTRL FLAG TSD Fig.72 Block diagram ●Pin description (BD6519FJ) Pin No. Symbol 1 GND Top View Fig.73 Pin Configuration I/O Pin function I Ground. 2, 3 VDD I Power supply input. Input terminal to the power switch and power supply input terminal of the internal circuit. At use, connect each pin outside. 4 CTRL I Enable input. Power switch on at Low level. (BD6519FJ) High level input > 2.5V, Low level input < 0.7V. 5 FLAG O Error flag output. Low at over current, thermal shutdown. Open drain output. 6, 7, 8 OUT O Power switch output. At use, connect each pin outside. ●I/O circuit (BD6519FJ) Symbol Pin No CTRL 4 FLAG 5 OUT 6,7,8 www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. Equivalent circuit 12/18 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ ●Functional description (BD2041AFJ/2051AFJ) 1. Switch operation IN terminal and OUT terminal are connected to the drain and the source of switch MOSFET respectively. And the IN terminal is used also as power source input to internal control circuit. When the switch is turned on from EN/EN control input, IN terminal and OUT terminal are connected by a 80mΩ switch. In on status, the switch is bidirectional. Therefore, when the potential of OUT terminal is higher than that of IN terminal, current flows from OUT terminal to IN terminal. Since a parasitic diode between the drain and the source of switch MOSFET is canceled, in the off status, it is possible to prevent current from flowing reversely from OUT to IN. 2. Thermal shutdown circuit (TSD) If over current would continue, the temperature of the IC would increase drastically. If the junction temperature were beyond 140°C (typ.) in the condition of over current detection, thermal shutdown circuit operates and makes power switch turn off and outputs error flag (/OC). Then, when the junction temperature decreases lower than 120°C (typ.), power switch is turned on and error flag (/OC) is cancelled. Unless the fact of the increasing chips temperature is removed or the output of power switch is turned off, this operation repeats. The thermal shutdown circuit operates when the switch is on (EN,/EN signal is active). 3. Over current detection (OCD) The over current detection circuit limits current (ISC) and outputs error flag (/OC) when current flowing in each switch MOSFET exceeds a specified value. There are three types of response against over current. The over current detection circuit works when the switch is on (EN,/EN signal is active). 3-1. When the switch is turned on while the output is in shortcircuit status When the switch is turned on while the output is in shortcircuit status or so, the switch gets in current limit status soon. 3-2. When the output shortcircuits while the switch is on When the output shortcircuits or large capacity is connected while the switch is on, very large current flows until the over current limit circuit reacts. When the current detection, limit circuit works, current limitation is carried out. 3-3. When the output current increases gradually When the output current increases gradually, current limitation does not work until the output current exceeds the over current detection value. When it exceeds the detection value, current limitation is carried out. 4. Under voltage lockout (UVLO) UVLO circuit prevents the switch from turning on until the VIN exceeds 2.3V(Typ.). If the VIN drops below 2.2V(Typ.) while the switch turns on, then UVLO shuts off the power switch. UVLO has hysteresis of a 100mV(Typ). Under voltage lockout circuit works when the switch is on (EN,/EN signal is active). 5. Error flag (/OC) output Error flag output is N-MOS open drain output. At detection of over current, thermal shutdown, low level is output. Over current detection has delay filter. This delay filter prevents instantaneous current detection such as inrush current at switch on, hot plug from being informed to outside. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 13/18 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ ●Functional description (BD6519FJ) 1. Switch operation VDD terminal and OUT terminal are connected to the drain and the source of switch MOSFET respectively. And the VDD terminal is used also as power source input to internal control circuit. When the switch is turned on from CTRL control input, VDD terminal and OUT terminal are connected by a 100mΩ switch. In on status, the switch is bidirectional. Therefore, when the potential of OUT terminal is higher than that of VDD terminal, current flows from OUT terminal to VDD terminal. Since a parasitic diode between the drain and the source of switch MOSFET is canceled, in the off status, it is possible to prevent current from flowing reversely from OUT to VDD. 2. Thermal shutdown circuit (TSD) If over current would continue, the temperature of the IC would increase drastically. If the junction temperature were beyond 135°C (typ.) in the condition of over current detection, thermal shutdown circuit operates and makes power switch turn off and outputs error flag (FALG). Then, when the junction temperature decreases lower than 125°C (typ.), power switch is turned on and error flag (FLAG) is cancelled. Unless the fact of the increasing chips temperature is removed or the output of power switch is turned off, this operation repeats. The thermal shutdown circuit operates when the switch is on (CTRL signal is active). 3. Over current detection (OCD) The over current detection circuit limits current (ISC) and outputs error flag (FLAG) when current flowing in each switch MOSFET exceeds a specified value. There are three types of response against over current. The over current detection circuit works when the switch is on (CTRL signal is active). 3-1. When the switch is turned on while the output is in shortcircuit status When the switch is turned on while the output is in shortcircuit status or so, the switch gets in current limit status soon. 3-2. When the output shortcircuits while the switch is on When the output shortcircuits or large capacity is connected while the switch is on, very large current flows until the over current limit circuit reacts. When the current detection, limit circuit works, current limitation is carried out. 3-3. When the output current increases gradually When the output current increases gradually, current limitation does not work until the output current exceeds the over current detection value. When it exceeds the detection value, current limitation is carried out. 4. Under voltage lockout (UVLO) UVLO circuit prevents the switch from turning on until the VDD exceeds 2.5V(Typ.). If the VDD drops below 2.3V(Typ.) while the switch turns on, then UVLO shuts off the power switch. UVLO has hysteresis of a 200mV(Typ). Under voltage lockout circuit works when the switch is on (CTRL signal is active). 5. Error flag (FLAG) output Error flag output (FLAG) is N-MOS open drain output. At detection of over current, thermal shutdown, low level is output. Over current detection has delay filter on 2.5ms(Typ.). This delay filter prevents instantaneous current detection such as inrush current at switch on, hot plug from being informed to outside. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 14/18 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ V/EN Output shortcircuit VOUT Thermal shut down IOUT V/OC delay Fig.74 Over current detection, thermal shutdown timing (BD2041AFJ/BD6519FJ) VEN Output shortcircuit VOUT Thermal shut down IOUT V/OC delay Fig.75 Over current detection, thermal shutdown timing (BD2051AFJ) ※ IN, EN (/EN), and /OC terminal of BD2041AFJ/BD2051AFJ correspond to VDD, CTRL, and FLAG terminal of BD6519FJ, respectively. ●Typical application circuit 5V(typ.) VBUS D+ IN Regulator OUT D- Ferrite Beads GND USB Controller 10k~ 100kΩ CIN GND OUT IN OUT IN OUT EN(/EN) /OC VBUS D+ + CL - DFerrite Beads GND Fig.76 Typical application circuit (BD2041AFJ/51AFJ) www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 15/18 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ ●Application information When excessive current flows owing to output shortcircuit or so, ringing occurs by inductance of power source line to IC, and may cause bad influences upon IC actions. In order to avoid this case, connect a bypath capacitor by IN terminal and GND terminal of IC. 1μF or higher is recommended. Pull up /OC output by resistance 10kΩ ~ 100kΩ. Set up value which satisfies the application as CL and Ferrite Beads. This system connection diagram doesn’t guarantee operating as the application. The external circuit constant and so on is changed and it uses, in which there are adequate margins by taking into account external parts or dispersion of IC including not only static characteristics but also transient characteristics. ※ IN, EN (/EN), and /OC terminal of BD2041AFJ/BD2051AFJ correspond to VDD, CTRL, and FLAG terminal of BD6519FJ, respectively. ●Power dissipation character (SOP-J8) 600 POWER DISSIPATION: Pd[mW] 500 400 300 200 100 0 0 25 50 75 100 125 150 AMBIENT TEMPERATURE: Ta [℃] Fig.77 Power dissipation curve (Pd-Ta Curve) ●Notes for use (1) Absolute Maximum Ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down devices, thus making impossible to identify breaking mode such as a short circuit or an open circuit. If any special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take physical safety measures including the use of fuses, etc. (2) Operating conditions These conditions represent a range within which characteristics can be provided approximately as expected. The electrical characteristics are guaranteed under the conditions of each parameter. (3) Reverse connection of power supply connector The reverse connection of power supply connector can break down ICs. Take protective measures against the breakdown due to the reverse connection, such as mounting an external diode between the power supply and the IC’s power supply terminal. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 16/18 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ (4) Power supply line Design PCB pattern to provide low impedance for the wiring between the power supply and the GND lines. In this regard, for the digital block power supply and the analog block power supply, even though these power supplies has the same level of potential, separate the power supply pattern for the digital block from that for the analog block, thus suppressing the diffraction of digital noises to the analog block power supply resulting from impedance common to the wiring patterns. For the GND line, give consideration to design the patterns in a similar manner. Furthermore, for all power supply terminals to ICs, mount a capacitor between the power supply and the GND terminal. At the same time, in order to use an electrolytic capacitor, thoroughly check to be sure the characteristics of the capacitor to be used present no problem including the occurrence of capacity dropout at a low temperature, thus determining the constant. (5) GND voltage Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state. Furthermore, check to be sure no terminals are at a potential lower than the GND voltage including an actual electric transient. (6) Short circuit between terminals and erroneous mounting In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can break down the ICs. Furthermore, if a short circuit occurs due to foreign matters entering between terminals or between the terminal and the power supply or the GND terminal, the ICs can break down. (7) Operation in strong electromagnetic field Be noted that using ICs in the strong electromagnetic field can malfunction them. (8) Inspection with set PCB On the inspection with the set PCB, if a capacitor is connected to a low-impedance IC terminal, the IC can suffer stress. Therefore, be sure to discharge from the set PCB by each process. Furthermore, in order to mount or dismount the set PCB to/from the jig for the inspection process, be sure to turn OFF the power supply and then mount the set PCB to the jig. After the completion of the inspection, be sure to turn OFF the power supply and then dismount it from the jig. In addition, for protection against static electricity, establish a ground for the assembly process and pay thorough attention to the transportation and the storage of the set PCB. (9) Input terminals In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the input terminal. Therefore, pay thorough attention not to handle the input terminals, such as to apply to the input terminals a voltage lower than the GND respectively, so that any parasitic element will operate. Furthermore, do not apply a voltage to the input terminals when no power supply voltage is applied to the IC. In addition, even if the power supply voltage is applied, apply to the input terminals a voltage lower than the power supply voltage or within the guaranteed value of electrical characteristics. (10) Ground wiring pattern If small-signal GND and large-current GND are provided, It will be recommended to separate the large-current GND pattern from the small-signal GND pattern and establish a single ground at the reference point of the set PCB so that resistance to the wiring pattern and voltage fluctuations due to a large current will cause no fluctuations in voltages of the small-signal GND. Pay attention not to cause fluctuations in the GND wiring pattern of external parts as well. (11) External capacitor In order to use a ceramic capacitor as the external capacitor, determine the constant with consideration given to a degradation in the nominal capacitance due to DC bias and changes in the capacitance due to temperature, etc. (12) Thermal shutdown circuit (TSD) When junction temperatures become detected temperatures or higher, the thermal shutdown circuit operates and turns a switch OFF. The thermal shutdown circuit, which is aimed at isolating the LSI from thermal runaway as much as possible, is not aimed at the protection or guarantee of the LSI. Therefore, do not continuously use the LSI with this circuit operating or use the LSI assuming its operation. (13) Thermal design Perform thermal design in which there are adequate margins by taking into account the power dissipation (Pd) in actual states of use. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 17/18 2011.05 - Rev.B Technical Note BD2041AFJ,BD2051AFJ,BD6519FJ ●Ordering part number B D 6 Part No. 5 1 9 F Part No. 2041A 2051A 6519 J - Package FJ: SOP-J8 E 2 Packaging and forming specification E2: Embossed tape and reel (SOP-J8) SOP-J8 <Tape and Reel information> 4.9±0.2 (MAX 5.25 include BURR) +6° 4° −4° 6 5 0.45MIN 7 3.9±0.2 6.0±0.3 8 1 2 3 Tape Embossed carrier tape Quantity 2500pcs Direction of feed E2 The direction is the 1pin of product is at the upper left when you hold ( reel on the left hand and you pull out the tape on the right hand ) 4 0.545 0.2±0.1 0.175 1.375±0.1 S 1.27 0.42±0.1 0.1 S 1pin Reel (Unit : mm) www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 18/18 Direction of feed ∗ Order quantity needs to be multiple of the minimum quantity. 2011.05 - Rev.B Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. 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If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us. ROHM Customer Support System http://www.rohm.com/contact/ www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. R1120A