TK740xxL DUAL LOW DROPOUT VOLTAGE REGULATOR FEATURES n n n n n n n n n n n n n APPLICATIONS 2 Channel LDO in one Package Outputs can be set by External Resistors High Precision Output Voltage ( 2.0 % or 60 mV) Independent Active High On/Off Control for each LDO Very Low Dropout Voltage (VDROPA = 90 mV at 100 mA, VDROPB = 80 mV at 50 mA) Stable with Ceramic Capacitors Excellent Ripple Rejection Ratio (84 dB @ 400 Hz) 1 A at Shutdown Peak Output Current is 370 mA SOT23L-8 Package Wide Operating Voltage Range (1.8 V ~ 14.5 V) Reverse Bias and Overcurrent Protection Built-in Thermal Shutdown DESCRIPTION The TK740xx is a Dual Ultra Low-Drop-Out regulator with a built-in electronic switch. The A-Side delivers up to 200 mA output current and the B-Side delivers up to 120 mA output current over the full temperature range. The internal switch can be controlled by TTL or CMOS logic levels. The device is in the "on" state when the control pin is pulled to a logic high level. External capacitors can be connected between the FBA and VOUTA and FBB and VOUTB pins to lower the output noise level. n n n n n n n Battery Powered Systems Measurement Systems Mobile Communications Systems Cellular Phones Cordless Phones PDAs Toy Motor Drivers load current is internally monitored and the device will shut down in the presence of a short circuit or overcurrent condition at the output. The TK740xx circuit features very high stability. An output capacitor of 0.22 mF provides stable operation for VOUT 2.0 V. Any type of capacitor can be used; however, the larger this capacitor is, the better the overall characteristics are. The ripple rejection ratio is 84 dB at 400 Hz, and 80 dB at 1 kHz. The TK740xx is available in the SOT23L-8 surface mount package. TK740xxL FBA Internal PNP pass transistors are used to achieve a low dropout voltage of 90 mV (typ.) at 100 mA load current side A and 80 mV (typ.) at 50 mA load current side B. The TK740xx has very low quiescent current. 45 A at no load and 0.4 mA with a 50 mA load. The internal thermal shut down circuitry limits the junction temperature to 150 C. The Temp. Code VIN VOUTB GND ON/OFF CONTROL B BLOCK DIAGRAM VIN VOUT B VOUT A B Side Voltage Code A Side Voltage Code Tape/Reel Code Package Code ON/OFF CONTROL A VOUTA FBB ORDERING INFORMATION TK740 CL- 8 ON / OFF CONTROL A B FBB FBA RIN = 300 k BANDGAP REFERENCE VOLTAGE CODES: PACKAGE CODE: TAPE/REEL CODE: Refer to Table 1 S: SOT23L-8 L: Tape Left Reel Size = 1300 pcs. GND THERMAL & OVER CURRENT PROTECTION BANDGAP REFERENCE GND TEMP. CODE: C: -30 to 80C I: -40 to 85C January 22, 2002 TOKO, Inc. Page 1 TK740xxL ABSOLUTE MAXIMUM RATINGS - C RANK Supply Voltage ............................................... -0.4 to16 V Power Dissipation .............................................. 600 mW Reverse Bias Voltage ................................... -0.4 to 10 V Operating Voltage Range ............................ 1.8 to 14.5 V Storage Temperature Range ..................... -55 to +150 C Operating Temperature Range ..................... -30 to +80 C Noise Bypass Pin Voltage .............................. -0.4 to 5 V Control Pin Voltage ...................................... -0.4 to VOP V Short Circuit Current (A Side) .............................. 430 mA Short Circuit Current (B Side) .............................. 330 mA TK740xx ELECTRICAL CHARACTERISTICS - C RANK Test conditions: TA = 25 C, VIN = VOUT(TYP) + 1 V, IOUT = 1 mA COMMON SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNITS VOUT Output Voltage IOUT = 5 mA See Table 1 Line Reg Line Regulation D V = 5 V (VIN = VOUT(TYP) + 1V to VOUT(TYP) + 6 V) IOUT = 5 mA VIN = 18 V 0.0 5.0 mV IQ Quiescent Current IOUT = 0 mA Excluding ICONT 45 75 mA ISTBY Standby Current VCC = 10 V 0.0 0.1 mA VFB Feedback Term. Voltage 1.11 1.19 1.29 V DVOUT/DTA Temperature Coefficient OFF Mode IOUT = 5 mA 70 ppm / C CONTROL TERMINAL SPECIFICATION (Note 3) ICONT Control Current VCONT Control Voltage Load Reg Load Regulation (Note 1) VOUT = 1.8 V, ON Mode 1.8 SIDE A Output ON SIDE B VDROP 1.8 mA V Output OFF Dropout Voltage 5 0.8 V IOUT = 5 mA to 100 mA 14 30 mV IOUT = 5 mA to 200 mA 33 37 mV IOUT = 100 mA 90 150 mV IOUT = 150 mA 125 180 mV IOUT = 200 mA 160 250 mV IOUT(MAX) Maximum Output Current VOUT = VOUT(TYP) x 0.9 Load Reg Load Regulation (Note 1) IOUT = 5 mA to 100 mA 17 40 mV 125 mV Dropout Voltage IOUT = 50 mA 80 VDROP IOUT = 100 mA 135 220 mV IOUT(MAX) Maximum Output Current Page 2 VOUT = VOUT(TYP) x 0.9 (Note 2) (Note 2) 290 190 380 280 mA mA January 22, 2002 TOKO, Inc. TK740xxL TK740xx ELECTRICAL CHARACTERISTICS - C RANK (CONT.) Test conditions: TA = 25 C, VIN = VOUT(TYP) + 1 V, IOUT = 1 mA SYMBOL RR PARAMETER Ripple Rejection TEST CONDITIONS MIN TYP MAX UNITS f = 400 Hz, CL = 1.0 mF, CN = 0.01 mF, VNOISE = 200 mVRMS, VIN = VOUT(TYP) + 1.5 V, IOUT = 10 mA 84 dB f = 1 kHz, CL = 1.0 mF, CN = 0.01 mF, VNOISE = 200 mVRMS, VIN = VOUT(TYP) + 1.5 V, IOUT = 10 mA 80 dB Note 1: This value depends on the output voltage. This is a reference value for a 3V output device. The details of each device are described in the individual specifications. Note 2: The output current is limited by the power dissipation of the total of both sides. Note 3: Pull down resistor for control terminal is not built in. General Note: Parameters with only typical values are just reference. (Not guaranteed) General Note: Limits are guaranteed by production testing or correction techniques using Statistical Quality Control (SQC) methods. Unless otherwise noted. VIN = VOUT(TYP) + 1V; IOUT= 1 mA (Tj = 25C) The operation of -30 to 80C is guaranteed in the design by a usual inspection. General Note: Exceeding the "Absolute Maximum Rating" may damage the device. January 22, 2002 TOKO, Inc. Page 3 TK740xxL ABSOLUTE MAXIMUM RATINGS - I RANK Supply Voltage ............................................... -0.4 to16 V Power Dissipation .............................................. 600 mW Reverse Bias Voltage ................................... -0.4 to 10 V Operating Voltage Range ............................... 2.1 to 14 V Storage Temperature Range ..................... -55 to +150 C Operating Temperature Range ..................... -40 to +85 C Noise Bypass Pin Voltage .............................. -0.4 to 5 V Control Pin Voltage ...................................... -0.4 to VOP V Short Circuit Current (A Side) .............................. 430 mA Short Circuit Current (B Side) .............................. 330 mA TK740xx ELECTRICAL CHARACTERISTICS - I RANK Test conditions: TA = 25 C, Bold typeface applies over the -40C to 85C Ambient Temperature Range. Operational Voltage Range is (2.1 V VOP 14 V). Unless otherwise noted. VIN = VOUT(TYP) + 1 V, IOUT = 1 mA COMMON SYMBOL PARAMETER TEST CONDITIONS VOUT Output Voltage IOUT = 5 mA Line Reg Line Regulation D V = 5 V (VIN = VOUT(TYP) + 1V to VOUT(TYP) + 6 V) IOUT = 5 mA VIN = 18 V IQ Quiescent Current IOUT = 0 mA Excluding ICONT ISTBY Standby Current VCC = 10 V VFB Feedback Term. Voltage DVOUT/DTA Temperature Coefficient MIN TYP MAX UNITS See Table 2 OFF Mode 1.11 IOUT = 5 mA 0.0 5.0 7.0 mV 45 75 95 mA 0.0 0.1 3 mA 1.19 1.30 V 70 ppm / C Control Terminal Specification (Note 3) ICONT Control Current VOUT = 1.8 V Output ON VCONT 1.8 ON Mode 1.8 2.0 Control Voltage IOUT = 5 mA to 100 mA 0.8 0.6 V 14 30 39 mV 33 70 90 mV 90 150 180 mV 125 180 230 mV 160 250 300 mV Load Regulation (Note 1) SIDE A IOUT = 5 mA to 200 mA IOUT = 100 mA VDROP Dropout Voltage IOUT = 150 mA IOUT = 200 mA IOUT(MAX) Page 4 mA V Output OFF Load Reg 5 7 Maximum Output Current VOUT = VOUT(TYP) x 0.9 (Note 2) 290 250 380 mA January 22, 2002 TOKO, Inc. TK740xxL TK740xx ELECTRICAL CHARACTERISTICS (I RANK) (CONT.) Test conditions: TA = 25 C, Bold typeface applies over the -40C to 85C Ambient Temperature Range. Operational Voltage Range is (2.1 V VOP 14 V). Unless otherwise noted. VIN = VOUT(TYP) + 1 V, IOUT = 1 mA SYMBOL SIDE B Load Reg PARAMETER Load Regulation (Note 1) TEST CONDITIONS MIN IOUT = 5 mA to 100 mA IOUT = 50 mA VDROP RR MAX UNITS 17 40 50 mV 80 125 175 mV 135 220 280 mV Dropout Voltage IOUT = 100 mA IOUT(MAX) TYP Maximum Output Current Ripple Rejection VOUT = VOUT(TYP) x 0.9 (Note 2) 190 150 380 f = 400 Hz, CL = 1.0 mF, CN = 0.01 mF, VNOISE = 200 mVRMS, VIN = VOUT(TYP) + 1.5 V, IOUT = 10 mA 84 f = 1 kHz, CL = 1.0 mF, CN = 0.01 mF, VNOISE = 200 mVRMS, VIN = VOUT(TYP) + 1.5 V, IOUT = 10 mA 80 mA dB dB Note 1: This value depends on the output voltage. This is a reference value for a 3V output device. The details of each device are described in the individual specifications. Note 2: The output current is limited by the power dissipation of the total of both sides. Note 3: Pull down resistor for control terminal is not built in. General Note: Parameters with only typical values are just reference. (Not guaranteed) General Note: Limits are guaranteed by production testing or correction techniques using Statistical Quality Control (SQC) methods. Unless otherwise noted. VIN = VOUT(TYP) + 1V; IOUT= 1 mA (Tj = 25C) The operation of -40 to 85C is guaranteed in the design by a usual inspection. General Note: Exceeding the "Absolute Maximum Rating" may damage the device. January 22, 2002 TOKO, Inc. Page 5 TK740xxL TK740xx ELECTRICAL CHARACTERISTICS TABLE 1 Test Conditions: VIN = VOUT(TYP) + 1 V, IOUT = 5 mA, TA = 25 C, unless otherwise specified. Standard Temp. Range Spec. Extended Temp. Range. Spec. Room Temp (TA = 25C) Full Temp (TA = -40 to 85C) Output Voltage Voltage Code VOUT Min VOUT Max 1.3 V 13 1.240 V 1.360V 1.4 V 14 1.340 V 1.460 V 1.5 V 15 1.440 V 1.560 V 1.6 V 16 1.540 V 1.660 V 1.7 V 17 1.640 V 1.760 V * 1.8 V 18 1.740 V 1.860 V * 1.9 V 19 1.840 V 1.960 V * 2.0 V 20 1.940 V 2.1 V 21 2.2 V Availability VOUT Min VOUT Max 1.720 V 1.880 V 2.060 V 1.920 V 2.080 V 2.040 V 2.160 V 2.020 V 2.180 V 22 2.140 V 2.260 V 2.120 V 2.280 V 2.3 V 23 2.240 V 2.360 V 2.220 V 2.380 V 2.4 V 24 2.340 V 2.460 V 2.320 V 2.480 V 2.5 V 25 2.440 V 2.560 V 2.420 V 2.580 V 2.6 V 26 2.540 V 2.660 V 2.520 V 2.680 V * 2.7 V 27 2.640 V 2.760 V 2.620 V 2.780 V * 2.8 V 28 2.740 V 2.860 V 2.720 V 2.880 V * 2.9 V 29 2.840 V 2.960 V 2.820 V 2.980 V * 3.0 V 30 2.940 V 3.060 V 2.920 V 3.080 V * 3.1 V 31 3.038 V 3.162 V 3.020 V 3.180 V * 3.2 V 32 3.136 V 3.264 V 3.120 V 3.280 V * * * Page 6 January 22, 2002 TOKO, Inc. TK740xxL TK740xx ELECTRICAL CHARACTERISTICS TABLE 1 (CONT) Test Conditions: VIN = VOUT(TYP) + 1 V, IOUT = 5 mA, TA = 25 C, unless otherwise specified. Standard Temp. Range Spec. Room Temp (TA = 25C) Extended Temp. Range. Spec. Full Temp (TA = -40 to 85C) Availability Output Voltage Voltage Code VOUT Min VOUT Max VOUT Min VOUT Max * 3.3 V 33 3.234 V 3.366 V 3.220 V 3.380 V 3.4 V 34 3.232 V 3.468 V 3.320 V 3.480 V * 3.5 V 35 3.430 V 3.570 3.420 V 3.580 V * 3.6 V 36 3.528 V 3.672 V 3.520 V 3.680 V 3.7 V 37 3.626 V 3.774 V 3.620 V 3.780 V 3.8 V 38 3.724 V 3.876 V 3.720 V 3.880 V 3.9 V 39 3.822 V 3.978 V 3.820 V 3.980 V 4.0 V 40 3.920 V 4.080 V 3.910 V 4.090 V 4.1 V 41 4.018 V 4.182 V 4.009 V 4.191 V 4.2 V 42 4.116 V 4.284 V 4.108 V 4.292 V 4.3 V 43 4.214 V 4.386 V 4.197 V 4.393 V 4.4 V 44 4.312 V 4.488 V 4.306 V 4.494 V 4.5 V 45 4.410 V 4.590 V 4.405 V 4.595 V 4.6 V 46 4.508 V 4.692 V 4.504 V 4.696 V 4.7 V 47 4.606 V 4.794 V 4.606 V 4.797 V 4.8 V 48 4.704 V 4.896 V 4.702 V 4.898 V 4.9 V 49 4.802 V 4.998 V 4.801 V 4.999 V 5.0 V 50 4.900 V 5.100 V 4.900 V 5.100 V * * * * * January 22, 2002 TOKO, Inc. Page 7 TK740xxL TEST CIRCUIT CONT B 4 0.01 F VOUTB GND VIN VOUTA 8 CL B 0.1 F CONT A CL A 0.1 F TYPICAL PERFORMANCE CHARACTERISTICS A and B: COMMON CHARACTERISTICS QUIESCENT CURRENT vs. VIN STANDBY CURRENT vs. VIN (ON MODE) IOUT = 0 mA (OFF MODE) LINE REGULATION 1 mV/DIV VOUT(TYP) 3.0 ISTBY(A) IQ(mA) 1E-6 VOUT = 3 V VOUT = 4 V 2.0 VOUT = 5 V 1.0 0 0 1E-7 1E-8 1E-9 10 VIN (V) 20 1E-10 0 CONTROL CURRENT vs. CONTROL VOLTAGE IOUT = 0 mA 10 VCC (V) 0 20 10 VIN (V) 20 CONTROL VOLTAGE (VOUT' ON/OFF POINT) CONTROL CURRENT vs. TEMPERATURE vs. TEMPERATURE 2 50 5 25 VCONT(V) ON ICONT(A) ICONT(A) 4 VOUT 3 2 VCONT = 1.8 V 1 OFF ICONT 0 0 Page 8 5.0 VCONT(V) 1 10 0 -50 0 50 TA (C) 100 0 -50 0 50 TA (C) 100 January 22, 2002 TOKO, Inc. TK740xxL TYPICAL PERFORMANCE CHARACTERISTICS (CONT) SIDE A SIDE B SHORT CIRCUIT CURRENT B 3.5 3.0 3.0 2.5 2.5 VOUT(V) VOUT(V) SHORT CIRCUIT CURRENT A 3.5 2.0 1.5 2.0 1.5 1.0 1.0 0.5 0.5 0.0 0 100 200 300 IOUT(mA) 400 0.0 0 500 3.04 3.04 3.02 3.02 3.00 3.00 2.98 2.96 2.92 2.92 100 IOUT(mA) 150 200 2.90 0 VIN vs. VOUT A 50 100 IOUT(mA) 150 200 VIN vs. VOUT B IOUT = 0, 50, 100, 150, 200, 250 (mA) in 50 mA STEPS VOUT(TYP) 500 2.96 2.94 50 400 2.98 2.94 2.90 0 200 300 IOUT(mA) LOAD REGULATION B VOUT(V) VOUT(V) LOAD REGULATION A 100 IOUT = 0, 50, 100, 150, 200 (mA) in 50 mA STEPS VOUT(TYP) IOUT = 0 mA VOUT(25mV/DIV) VOUT(25mV/DIV) IOUT = 0 mA IOUT = 250 mA IOUT = 200 mA VIN = VOUT VIN = VOUT VIN (100 mV/DIV) VIN (100 mV/DIV) January 22, 2002 TOKO, Inc. Page 9 TK740xxL TYPICAL PERFORMANCE CHARACTERISTICS (CONT) SIDE A SIDE B DROPOUT VOLTAGE B DROPOUT VOLTAGE A 0 -0.05 -0.05 VDROP(V) VDROP(V) 0 -0.10 -0.10 -0.15 -0.15 -0.20 0 50 100 IOUT(mA) 150 200 -0.20 0 10 10 8 8 6 4 2 0 0 Page 10 100 IOUT(mA) 150 200 GROUND PIN CURRENT vs. OUTPUT CURRENT B IGND(mA) IGND(mA) GROUND PIN CURRENT vs. OUTPUT CURRENT A 50 6 4 2 100 IOUT(mA) 200 0 0 100 IOUT(mA) 200 January 22, 2002 TOKO, Inc. TK740xxL TYPICAL PERFORMANCE CHARACTERISTICS (CONT) SIDE A SIDE B AMBIENT TEMPERATURE BEHAVIOR GROUND PIN CURRENT vs. TEMPERATURE GROUND PIN CURRENT vs. TEMPERATURE 10 10 9 9 8 7 6 IGND(mA) IGND(mA) 8 IOUT = 200 mA 7 5 4 IOUT = 100 mA 3 6 5 IOUT = 100 mA 4 3 2 1 2 1 0 -40 -20 0 20 40 TA (C) 60 0 -40 -20 80 100 DROPOUT VOLTAGE vs. TEMPERATURE 0 20 40 TA (C) 60 80 100 DROPOUT VOLTAGE vs. TEMPERATURE 300 300 IOUT = 200 mA 250 250 200 150 VDROP(mV) VDROP(mV) IOUT = 100 mA 200 150 100 IOUT = 100 mA 100 50 0 -40 -20 0 20 40 TA (C) 60 0 -40 -20 80 100 MAXIMUM OUTPUT CURRENT vs. TEMPERATURE 500 500 400 400 300 200 100 0 -40 -20 0 20 40 TA (C) 60 80 100 MAXIMUM OUTPUT CURRENT vs. TEMPERATURE IOUT(mA) IOUT(mA) IOUT = 50 mA 50 300 200 100 0 20 40 TA (C) January 22, 2002 TOKO, Inc. 60 80 100 0 -40 -20 0 20 40 TA (C) 60 80 100 Page 11 TK740xxL TYPICAL PERFORMANCE CHARACTERISTICS (CONT) OUTPUT VOLTAGE TEMPERATURE BEHAVIOR TK74020M 2.010 2.005 5.000 4.995 5.000 1.995 4.990 VOUT VOUT TK74050M 5.010 5.005 4.985 1.990 1.985 4.980 1.980 4.975 1.975 4.970 1.970 4.965 4.960 -40 -20 1.965 1.960 -40 -20 0 20 40 TA (C) 60 80 100 0 1.820 1.815 4.000 3.995 1.810 1.805 3.990 3.985 1.790 1.785 3.970 1.780 3.965 3.960 -40 -20 1.775 1.770 -40 -20 60 80 100 0 3.000 2.995 2.800 2.895 2.990 VOUT VOUT Page 12 2.810 2.805 2.985 80 100 60 80 100 2.890 2.885 2.980 2.880 2.975 2.875 2.970 2.870 2.965 2.960 -40 -20 2.865 2.860 -40 -20 20 40 TA (C) 20 40 TA (C) TK74028M TK74030M 3.010 3.005 0 60 1.800 3.980 20 40 TA (C) 80 100 1.795 3.975 0 60 TK74018M 4.010 4.005 VOUT VOUT TK74040M 20 40 TA (C) 60 80 100 0 20 40 TA (C) January 22, 2002 TOKO, Inc. TK740xxL TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) Ripple Rejection (Tk74030M) CFB = 0 CFB = 4700 pF 1 10 100 FREQUENCY(kHz) 1000 CL = 0.1 F (MLCC) CL = 1.0 F (MLCC) 1 10 100 FREQUENCY(kHz) 1000 Conditions: VIN = 4.0 V VRIPPLE = 500 mVp-p CIN = 0 mF IOUT = 10 mA COUT = 1.0 mF (MLCC) CFB = 4700 pF CL = 0.1 F (MLCC) RR(dB) 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 0.1 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 0.1 CL = 1.0 F (MLCC) RR(dB) RR(dB) 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 0.1 CL = 1.0 F (Tantalum) 1 10 100 FREQUENCY(kHz) 1000 With CFB 200 mVp-p Input Wave Form VIN GND VIN VOUT 740xx CL VCONT CFB 4700 pF GND The Ripple Rejection characteristic improves by enlarging the capacitor on the output side. The characteristic of the high frequency area is decided by the characteristic of the output side capacitor. January 22, 2002 TOKO, Inc. Page 13 TK740xxL TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) Ripple Rejection When I/O Voltage difference is few When the difference between the input voltage and the output voltage decreases, the Ripple Rejection characteristic is different in Side A and Side B. The characteristic on the A side (where the power transistor is large) improves. RIPPLE REJECTION vs. VIN RIPPLE REJECTION vs. VIN (SIDE A) 0 -10 CL = 0.22 F CFB = 4700 pF -20 -30 dB -60 -60 -70 -80 10 KHz, 10 mA +0.4 V 10 KHz, 10 mA -90 -100 1 KHz, 10 mA +0.2 V 1 KHz, 100 mA -50 -70 -90 -100 10 KHz, 100 mA -40 1 KHz, 100 mA -50 -80 CL = 0.22 F CFB = 4700 pF -20 -30 10 KHz, 100 mA -40 dB (SIDE B) 0 -10 +0.6 V 1 KHz, 10 mA +0.2 V +0.4 V +0.6 V VIN = VOUT VIN = VOUT 200 mVp-p Input Wave Form Without CFB VIN GND VIN VOUT 740xx CL VCONT CFB 0 pF GND RIPPLE REJECTION vs. VIN RIPPLE REJECTION vs. VIN (SIDE A) 0 -10 -20 -30 dB dB -60 -60 -70 -80 10 KHz, 10 mA -90 -100 1 KHz, 10 mA +0.2 V VIN = VOUT +0.4 V +0.6 V 1 KHz, 100 mA -50 -70 -80 10 KHz, 100 mA -40 1 KHz, 100 mA -50 CL = 0.22 F CFB = None -20 -30 10 KHz, 100 mA -40 Page 14 (SIDE B) 0 -10 CL = 0.22 F CFB = None 10 KHz, 10 mA -90 -100 1 KHz, 10 mA +0.2 V +0.4 V +0.6 V VIN = VOUT January 22, 2002 TOKO, Inc. TK740xxL TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) OUTPUT NOISE NOISE DENSITY vs. CL (TK74030M) NOISE DENSITY vs. IOUT (TK74030M) 400 350 Conditions VIN = 4.0 V 350 300 CIN = 0.1 F (Tanalum) CFB = 4700 pF (Ceramic) 300 250 200 150 100 ch ch ch ch A B A B 1.0 F (MLCC) 1.0 F (MLCC) 1.0 F (Tantalum) 1.0 F (Tantalum) 50 0 NOISE (VRMS) NOISE (VRMS) 400 50 100 IOUT(mA) 150 200 CIN=0.1F (Tanalum) IOUT=200mA(ch A) IOUT=100mA(ch B) 250 200 150 100 0.1 ch ch ch ch 50 0 0 Conditions VIN=4.0V 1 CL(F) A B A B CFB =0 CFB =472 CFB =0 CFB =472 10 The noise in the low current region decreases when a tantalum capacitor is used. As for the output side capacitor, a tantalum capacitor of 0.1 mF is recommended. The characteristic of the capacitor greatly influences the amount of the noise. January 22, 2002 TOKO, Inc. Page 15 TK740xxL TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) Line Transient VIN = 4 V to 5 V to 4 V, CIN = 1.0 F(MLCC), CFB = 4700 pF A Side (IOUT = 100 mA) B Side (IOUT = 50 mA) VIN VIN CL = 0.47 F (MLCC) VOUTA CL = 1.0 F (MLCC) CL = 1.0 F (MLCC) VOUTA VOUTB CL = 3.3 F (MLCC) 10 mV/div 25 s/div VOUTA VOUTA Page 16 10 mV/div 25 s/div VIN CL = 0.47 F (MLCC) VOUTB CL = 1.0 F (MLCC) VOUTB CL = 3.3 F (MLCC) VOUTA CL = 3.3 F (MLCC) VOUTB VIN VOUTA CL = 0.47 F (MLCC) VOUTB 10 mV/div 25 s/div VOUTB CL = 0.47 F (MLCC) CL = 1.0 F (MLCC) CL = 3.3 F (MLCC) 10 mV/div 25 s/div January 22, 2002 TOKO, Inc. TK740xxL TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) Load Transient VIN = 4 V, CIN = 1.0 F(MLCC) A Side (IOUT) = 5 - 100 - 5 mA) B Side (IOUT) = 5 - 50 - 5 mA) CL = 1.0 F(Tantalum) IOUT CL = 1.0 F(Tantalum) IOUT 5 to 100 to 5 mA STEP VOUTA 5 to 50 to 5 mA STEP VOUTB CFB = 0 CFB = 0 200 mV/div 25 s/div VOUTA 200 mV/div 25 s/div VOUTB CFB = 4700 pF CFB = 4700 pF C = 4700 pF FB IOUT C = 4700 pF FB IOUT 5 to 100 to 5 mA STEP CL = 0.47 F(MLCC) CL = 0.47 F(MLCC) VOUTA VOUTB CL = 1.0 F(MLCC) CL = 1.0 F(MLCC) VOUTB VOUTA VOUTA 5 to 50 to 5 mA STEP CL = 3.3 F(MLCC) 200 mV/div 250 s/div 200 mV/div 250 s/div CL = 3.3 F(MLCC) VOUTB C = 4700 pF FB FCFB = 4700 pF IOUT 5 to 100 to 5 mA STEP IOUT CL = 0.47 F(MLCC) CL = 0.47 F(MLCC) VOUTA VOUTB CL = 1.0 F(MLCC) VOUTB VOUTA 200 mV/div 50 s/div VOUTA 5 to 100 to 5 mA STEP CL = 3.3 F(MLCC) CL = 3.3 F(MLCC) January 22, 2002 TOKO, Inc. CL = 1.0 F(MLCC) VOUTB 500 mV/div 50 s/div Cfb=4 7 2 Page 17 TK740xxL TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) ON / OFF Transient IOUT = 10 mA, CIN = 0.11 F(MLCC), CL = 1.0 F (MLCC) A Side B Side 2 V/div 2 V/div VCONT VCONT CFB = 0 CFB = 0 VOUT VOUT VOUT CFB = 100 pF 200 mV/div 50 s/div VOUT CFB = 100 pF 2 V/div VCONT 2 V/div VCONT CFB = 1000 pF CFB = 1000 pF VOUT VOUT CFB =3300 pF CFB =3300 pF VOUT VOUT CFB =4700 pF 200 mV/div 1 ms/div VOUT 2 V/div VCONT The difference by CFB is negligible 200 mV/div 100 s/div Page 18 CFB =4700 pF 200 mV/div 1 ms/div VOUT VCONT VOUT 200 mV/div 25 s/div VOUT 2 V/div The difference by CFB is neligible 200 mV/div 100 s/div January 22, 2002 TOKO, Inc. TK740xxL TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) Cross Regulation CIN = 0.1 mF CL = 1.0 mF(MLCC) CFB = None The following graphs show the effect on both output voltages when rapidly changing the load current on only one side (A side or B side in 5-50 , 5-100, 5-200 mA steps). The current on the side where the load current is not allowed to change is 5 mA constant. The measurement sensitivity on the side without the current change is 5 mV/div: the side with the current change is 200 mV/DIV. A: = 5 mA(const) B: 5 to 100 mA Step A: = 5 mA(const) B: 5 to 50 mA Step 5 mV/div 250 s/div A VOUTA 5 mV/div 250 s/div A VOUTA B B 200 mV/div 250 s/div 200 mV/div 250 s/div VOUTB VOUTB IOUT = 100 to 5 mA STEP IOUT = 50 to 5 mA STEP I OUTB TIME (250 S) I OUTB A: = 5 to 50 mA Step B: 5 mA(const) IOUT = 50 to 5 mA STEP IOUTA VOUTA A: = 5 to 100 mA Step IOUT = 100 to 5 mA STEP IOUTA A VOUTA A 200 mV/div 250 s/div 200 mV/div 250 s/div B B V OUTB V OUTB 5 mV/div 250 s/div A: = 5 to 200 mA Step IOUTA VOUTA B: 5 mA(const) 5 mV/div 250 s/div B: 5 mA(const) IOUT = 200 to 5 mA STEP A 200 mV/div 250 s/div B V OUTB 5 mV/div 250 s/div January 22, 2002 TOKO, Inc. Page 19 TK740xxL DEFINITION AND EXPLANATION OF TECHNICAL TERMS OUTPUT VOLTAGE (VOUT) RIPPLE REJECTION RATIO (RR) The output voltage is specified with VIN = (VOUT(TYP) + 1 V) and IOUT = 5 mA. The rated output current is specified under the condition where the output voltage drops to VOUT(TYP) x 0.9. The input voltage is set to VOUT(TYP) +1 V, and the current is pulsed to minimize temperature effect. The output current decreases during low voltage operation. Ripple rejection is the ability of the regulator to attenuate the ripple content of the input voltage at the output. It is specified with 500 mVRMS, 100 Hz and 1 MHz signal superimposed on the input voltage, where VIN = VOUT + 1.5 V. The output decoupling capacitor is set to 1.0 F, the CFB capacitor is set to 4700 pF, and the load current is set to 10 mA. Ripple rejection is the ratio of the ripple content of the output vs. the input and is expressed in dB. Ripple rejection can be improved by increasing the CFB capacitor (However, the on/off response time will increase). DROPOUT VOLTAGE (VDROP) STANDBY CURRENT (ISTBY) The dropout voltage is the difference between the input voltage and the output voltage at which point the regulator starts to fall out of regulation (this is the point when the output voltage decreases by 100 mV). Below this value, the output voltage will fall as the input voltage is reduced. It is dependent upon the load current and the junction temperature. Standby current is the current into the regulator when the output is turned off by the control function. It is measured with an input voltage of 8 V. MAXIMUM OUTPUT CURRENT (IOUT(MAX)) LINE REGULATION (Line Reg) Line regulation is the ability of the regulator to maintain a constant output voltage as the input voltage changes. The line regulation is specified as the input voltage is changed from VIN = VOUT + 1 V to VIN = VOUT + 6 V. It is a pulsed measurement to minimize temperature effects. LOAD REGULATION (Load Reg) Load regulation is the ability of the regulator to maintain a constant output voltage as the load current changes. It is a pulsed measurement to minimize temperature effects with the input voltage set to VIN = VOUT +1 V. The load regulation is specified under two output current step conditions of 5 mA to 100 mA and 5 mA to 200 mA. QUIESCENT CURRENT (IQ) The quiescent current is the current which flows through the ground terminal under no load conditions (IOUT = 0 mA). GROUND PIN CURRENT(IGND) The ground pin current is the current which flows through the GND terminal according to load current. It is measured by (input current-output current). OVER CURRENT SENSOR The overcurrent sensor protects the device when there is excessive output current. it also protects the device if the output is accidentally shorted to ground. THERMAL SENSOR The thermal sensor protects the device if the junction temperature exceeds the safe value (Tj = 150 C). This temperature rise can be caused by extreme heat, excessive power dissipation caused by large output voltage drops, or excessive output current. The regulator will shut off when the temperature exceeds the safe value. As the junction temperature decreases, the regulator will begin to operate again. Under sustained fault conditions, the regulator output will oscillate as the device turns off then resets. Damage may occur to the device under extreme fault conditions. REVERSE VOLTAGE PROTECTION Reverse voltage protection prevents damage due to the output voltage being higher than the input voltage. This fault condition can occur when the output capacitor remains charged and the input is reduced to zero, or when an external voltage higher than the input voltage is applied to the output side. Toko's regulators do not need an inherent diode connected between the input and output. The maximum reverse bias boltage is 6 V. VIN TK740xx VOUT GND Page 20 January 22, 2002 TOKO, Inc. TK740xxL DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.) PACKAGE POWER DISSIPATION (PD) This is the power dissipation level at which the thermal sensor is activated. The IC contains an internal thermal sensor which monitors the junction temperature. When the junction temperature exceeds the monitor threshold of 150 C, the IC is shut down. The junction temperature rises as the difference between the input power (VIN x IIN) and the output power (VOUT x IOUT) increases. The rate of temperature rise is greatly affected by the mounting pad configuration on the PCB, the board material, and the ambient temperature. When the IC mounting has good thermal conductivity, the junction temperature will be low even if the power dissipation is large. When mounted on the recommended mounting pad, the power dissipation of the SOT23L-8 is increased to 600 mW. For operation at ambient temperatures over 25 C, the power dissipation of the SOT23L-8 device should be derated at 4.8 mW/ C. To determine the power dissipation for shutdown when mounted, attach the device on the actual PCB and deliberately increase the output current (or raise the input voltage) until the thermal protection circuit is activated. Calculate the power dissipation of the device by subtracting the output power from the input power. These measurements should allow for the ambient temperature of the PCB. The value obtained from PD /(150 C - TA) is the derating factor. The PCB mounting pad should provide maximum thermal conductivity in order to maintain low device temperatures. As a general rule, the lower the temperature, the better the reliability of the device. The thermal resistance when mounted is expressed as follows: The range of usable currents can also be found from the graph below. PD(mW) 2 Pd 5 3 4 0 25 50 100 75 TA (C) 150 Procedure: 1) Find PD 2) PD1 is taken to be PD x (~0.8 - 0.9) 3) Plot PD1 against 25 C 4) Connect PD1 to the point corresponding to the 150 C with a straight line. 5) In design, take a vertical line from the maximum operating temperature (e.g., 75 C) to the derating curve. 6) Read off the value of PD against the point at which the vertical line intersects the derating curve. This is taken as the maximum power dissipation, DPD. The maximum operating current is: IOUT = (DPD / (VIN(MAX) - VOUT) Tj = 0jA x PD + TA For Toko ICs, the internal limit for junction temperature is 150 C. If the ambient temperature (TA) is 25 C, then: 150 C = 0jA x PD + 25 C 0jA = 125 C / PD 0jA = 125 C / PD (C / mW) PD is the value when the thermal protection circuit is activated. A simple way to determine PD is to calculate VIN x IIN when the output side is shorted. Input current gradually falls as temperature rises. You should use the value when thermal equilibrium is reached. January 22, 2002 TOKO, Inc. Page 21 TK740xxL APPLICATION INFORMATION CONT B STANDARD APPLICATION 4 Typically, give the capacitor as large a value as practical in consideration of the temperature characteristic. The output noise and ripple noise decrease with a larger capacitance value. In addition, the response to the output side load change also improves. 0.01 F VOUTB GND VIN VOUTA 8 CL B 0.1 F (1.0 F) CONT A CL A 0.1 F (1.0 F) OUTPUT VOLTAGE CHANGE The output voltage on both sides can be set by using R1 and R2. The output voltage is deteremed by the ratio of R1 and R2. The error of the output voltage usually grows because of the tolerance of the external parts. CONT B R2' 4 R1' 0.01 F GND VOUTB VIN VOUT = (R1 / R2 + 1) x 1.19 22 k R2 VOUTA R1 8 R2 CONT A CL A 0.22 F (1.0 F) R1(K) = (VOUT / 1.19 - 1) x R2 CL B 0.1 F (1.0 F) NOISE REDUCTION (IMPROVEMENT OF RIPPLE REJECTION RATIO) Please connect CFB with the FBA terminals (1 and 2) and FBB terminals (3 and 4). It is possible to use CFB only on the needed side. A tantalum capacitor is the best in this application. A small capacitance is sufficient (0.1 F, 0.22 F, etc.). When the ceramic capacitor is used, the noise grows in the low current region. If 1.0 . (RS 1) is connected in series with the ceramic capacitor, the same characteristics as a tantalum capacitor can be obtained. Please adjust the output side capacitor to the value in which stable operation is done over all required temperature ranges. Damage will not be caused by enlarging this value. Increasing this value will decrease the ripple noise and improve the output load transient response. However, the risetime using the on/off control becomes slower. It is possible to use the noise reduction application with output voltage change application above. CONT B CFB = 4700 pF TK74028 NOISE LEVEL vs. CFB (A = B) 4 CL B 1.0 F CL A 1.0 F VIN VOUTA 8 GND CONT A IOUT = 50 to 200 mA VOUTB CFB 200 NOISE(V) 0.01 F CL= 1.0 F MLCC 100 CL * * F: Any capacitor can be used CL= 1.0 F TANTALUM 0 1 10 100 1k 10k 100k CFB (pF) 4700 pF is recommended for CFB Page 22 January 22, 2002 TOKO, Inc. TK740xxL APPLICATION INFORMATION (CONT.) BOARD LAYOUT ON/OFF B 5 VOUTB 4 GND VOUTA VIN 1 8 ON/OFF A GND SOT23L-8 BOARD LAYOUT 600 -4.8 mW / C PD(mW) Mounted as shown Free Air 0 0 January 22, 2002 TOKO, Inc. 25 50 (85) TA (C) 100 150 Page 23 TK740xxL APPLICATION INFORMATION (CONT.) INPUT-OUTPUT CAPACITORS Linear regulators require input and output capacitors in order to maintain the regulator's loop stability. The equivalent series resistance (ESR) of the output capacitor must be in the stable operation area. However, it is recommended to use as large a value of capacitance as is practical. The output noise and the ripple noise decrease as the capacitance value increases. The IC is never damaged by enlarging the capacitance. ESR values vary widely between ceramic and tantalum capacitors. However, tantalum capacitors are assumed to provide more ESR damping resistance, which provides greater circuit stability. This implies that a higher level of circuit stability can be obtained by using tantalum capacitors when compared to ceramic capacitors with similar values. The IC provides stable operation with an output side capacitor of 0.1 mF (VOUT 1.8 V). If the capacitor is 0.1 mF or more over its full range of temperature, either a ceramic capacitor or tantalum capacitor can be used without considering ESR (VOUT 1.8 V). The recommended value of CL 0.1 mF for IOUT 0.5 mA. For load current 0.5 mA, increase the output capacitor to 1 mF. The input capacitor is necessary when the battery is discharged, the power supply impedance increases, or the line distance to the power supply is long. This capacitor might be necessary on each individual IC even if two or more regulator ICs are used. It is not possible to determine this indiscriminately. Please confirm the stability while mounted. 10 STABLE AREA CL = 0.1 F ESR ( ) ESR ( ) ESR ( ) 1 0.1 0.1 0 50 100 IOUT (mA) All Stable CL 1.0 F 150 1 50 100 IOUT (mA) 150 STABLE AREA CL = 0.1 F 1 0.1 0 50 100 IOUT (mA) 150 1 0.1 0 .01 0 .01 0 All Stable 10 STABLE AREA CL = 0.1 F STABLE AREA CL = 0.1 F 0.1 0 .01 0 .01 All Stable 10 10 STABLE AREA CL = 0.1 F VOUT = 5.0 V 100 All Stable All Stable 1 VOUT = 4.0 V 100 100 ESR ( ) 10 CL = 0.22 F ~ 0.1 F CIN = 0.22 F ~ 0.1 F ESR ( ) 100 TK740xx VOUT = 3.0 V VOUT = 2.0 V VOUT = 1.5 V - 1.9 V 100 VOUT VIN 0 .01 0 50 100 IOUT (mA) 150 0 50 100 IOUT (mA) 150 Please increase the output capacitor value when the load current is 0.5 mA or less. The stability of the regulator improves if a big output side capacitor is used (the stable operation area extends). For evaluation Page 24 KYOCERA CM05B104K10AB, CM05B224K10AB, CM105B104K16A, CM105B224K16A, CM21B225K10A MURATA GRM36B104K10, GRM42B104K10, GRM39B104K25, GRM39B224K10, GRM39B105K6.3 January 22, 2002 TOKO, Inc. TK740xxL APPLICATION INFORMATION (CONT.) Bias Voltage and Temperature Characteristics of Ceramic Capacitors Generally, a ceramic capacitor has both a temperature characteristic and a voltage characteristic. Please consider both characteristics when selecting the part. The B curves are the recommended characteristics. CAPACITANCE vs. BIAS VOLTAGE CAPACITANCE vs. TEMPERATURE 100 B CURVE 90 CAPACITANCE (%) CAPACITANCE (%) 100 80 70 F CURVE 60 50 40 0 2 4 6 8 Bias Voltage (V) January 22, 2002 TOKO, Inc. 10 B CURVE 90 80 70 F CURVE 60 50 -50 - 25 0 25 T A (C) 50 75 100 Page 25 TK740xxL APPLICATION INFORMATION (CONT.) Super-Low I/O Voltage Difference and High Current LDO Connect the following terminals; pin 5 and pin 8, pin 1 and pin 4, pin 2 and pin 3. VDROP = 70 mV at 100 mA; 125 mV at 200 mA; 180 mV at 300 mA is typically obtained. Attention when this application is adopted The control current and the no load current double because the A and B circuits are connected in parallel. A very large current flows at the output during a short-circuit. Therefore, there is a possibility of damage by the current. Please note the shortcircuit of the output side and GND. The current value that can regularly be delivered is 300-400 mA. The output current is limited by the permissible electric power loss of the package. The current cannot be delivered exceeding this. However, a large peak current can be delivered for the pulse load with little generation of heat. The permissible loss increases by improving heat radiation. Please make the copper pattern in the IC part installation as wide as possible. For instance, the permissible electric power loss increases greatly if the board thermal plan is bonded to the IC. The characteristic of this application is not guaranteed immediately because Toko does not test to this application. The characteristic of this application is almost obtained by guaranteeing the characteristic on the A side and the B side. The difference appears large; use care when designing. FB B 6 VOUT VIN CL 1 0.22 F 8 VCONT GND FB A IGND vs. IOUT A + B 10 0 A+B -50 IGND(mA) VDROP(mV) DROPOUT VOLTAGE A + B -100 A -150 B -200 8 6 4 2 0 -250 0 100 IOUT(mA) 0 200 LOAD REGULATION 100 IOUT(mA) 200 SHORT CIRCUIT CURRENT VOUT(V) 5 VOUT(TYP) VOUT (10 mV/DIV 4 3 2 1 0 Page 26 100 200 IOUT(mA) 300 400 0 0 500 IOUT(mA) 1000 January 22, 2002 TOKO, Inc. TK740xxL APPLICATION INFORMATION (CONT.) Improvement of load regulation with high current application Please connect a resistor (Max = 1.2 - 1.6 W) between pin 6 of the TK740xx and GND. The load regulation is greatly improved. Please increase the I/O capacitors. LOAD REGULATION FB B RG 6 VIN GND VOUT CL 1 0.22 F 8 VCONT RG = 1.60 VOUT VOUT (TYP) VOUT (10mV/div) FB A 0 January 22, 2002 TOKO, Inc. 100 200 I OUT (mA) 300 400 Page 27 TK740xxL APPLICATION INFORMATION (CONT.) Variable output voltage. Output voltage controled by an external voltage (power supply, DAC, tec.). When VADJ is raised more than 1.25V, the correspoinding output voltage falls. Because the two sides operate independently, one side only can be used, if desired. R = 100 K CONT B VOUTB TK740xx 6 VOUTA 8 CONT A VIN VADJ GND Forward or reverse: Motor drive circuit. The direction of the direct current motor rotation changes with the direction of the current. A bridge circuit can be made with the TK740xx and an external transistor. Each element of the bridge circuit is controlled by an external signal. On/off control of the bridge elements is accomplished and the desired voltage polarity for the motor is selected. The speed changes in accordance with the amount of current (voltage) which flows through the motor. The TK740xx has both the switch function and the variable output voltage function. The motor rotation speed can be controlled by changing the output voltage. The speed and direction of the motor can be controlled by combining the two functions above. The I/O voltage difference of TK740xx is approximately 0.17 V at IOUT = 150 mA. The current when the motor starts is 300 mA Max. Constant speed (fixed voltage) Even if the input voltage changes, the voltage impressed to the motor is constant. Variable speed (variable voltage) When VADJ is raised more than 1.25 V, the output voltage falls. VOUTB CL = 0.1 F CFB = 0.0047 F CONT (F) M CONT (F) TK740xx TK740xx VOUTB CONT 8 (R) CONT (R) VOUTA VIN 8 M VOUTA VIN GND GND Page 28 VADJ January 22, 2002 TOKO, Inc. TK740xxL PACKAGE OUTLINE Marking Information SOT23L-8 0.45 1.0 5 8 e1 3.0 Marking X X A Voltage Code Product Code 1 e 0.8 4 Recommended Mount Pad +0.15 e 0.8 0.3 - 0.05 3.5 0.1 M +0.3 - 0.1 2.2 15 max 1.2 +0.15 - 0.05 0 - 0.1 0.1 0.15 1.4max (0.3) (3.4) 0.4 + 0.3 3.3 Dimensions are shown in milli meters Tolerance: x.x = 0.2 mm (unless otherwise specified) Product Code Part Number TK74013 TK74014 TK74015 TK74016 TK74017 TK74018 TK74019 TK74020 TK74021 TK74022 TK74023 TK74024 TK74025 TK74026 TK74027 TK74028 TK74029 TK74030 TK74031 TK74032 TK74033 TK74034 TK74035 TK74036 TK74037 TK74038 TK74039 TK74040 TK74041 TK74042 TK74043 TK74044 TK74045 TK74046 TK74047 TK74048 TK74049 TK74050 A Voltage Code 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Toko America, Inc. Headquarters 1250 Feehanville Drive, Mount Prospect, Illinois 60056 Tel: (847) 297-0070 Fax: (847) 699-7864 TOKO AMERICA REGIONAL OFFICES Midwest Regional Office Toko America, Inc. 1250 Feehanville Drive Mount Prospect, IL 60056 Tel: (847) 297-0070 Fax: (847) 699-7864 Semiconductor Technical Support Toko Design Center 4755 Forge Road Colorado Springs, CO 80907 Tel: (719) 528-2200 Fax: (719) 528-2375 Visit our Internet site at http://www.tokoam.com The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture of its products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc. TOKO's products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of Toko, Incorporated. January 22, 2002 TOKO, Inc. (c) 1999 Toko, Inc. All Rights Reserved Page 29 IC-264-TK740xx 0798O0.0K Printed in the USA