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| VOL TAGE REGULATOR FOR MIDDLE OUTPUT CURRENT Rx5RE SERIES APPLICATION MANUAL NO.EA-016-0006 VOLTAGE REGULATOR FOR MIDDLE OUTPUT CURRENT R x5RE SERIES OUTLINE The Rx5RE Series are voltage regulator ICs with high output voltage accuracy and ultra-low quiescent current by CMOS process. Each of these ICs consists of a voltage reference unit, an error amplifier, a driver transistor, and resistors for setting output voltage, and a current limit circuit. By use of these ICs, a constant voltage power supply circuit with high efficiency can be constructed because the dropout voltage and quiescent current of these ICs are very small. Furthermore, theses ICs have a built-in current limit circuit. The output voltage of these ICs is fixed with high accuracy. Two types of packages, TO-92 and SOT-89 (Mini-power Mold) are available. FEATURES * Ultra-low Quiescent Current ...........................TYP. 1.1A (Rx5RE30A,VIN=5.0V) * Ultra-low Dropout Voltage ...............................TYP. 0.5V (Rx5RE50A,IOUT=60mA) * Large Output Current ......................................TYP. 120mA (Rx5RE50A) * Low Temperature-Drift Coefficient of Output Voltage ...........................TYP. 100ppm/C * Broad Operating Voltage Range ......................MAX. 10.0V * Excellent Line Regulation ................................TYP. 0.1%/V * High Accuracy Output Voltage ........................2.5% * Output Voltage ...................................................Stepwise setting with a step of 0.1V in the range of 2.0V to 6.0V is possible (refer to Selection Guide) ..................................TO-92, SOT-89 (Mini-power Mold) * Two Types of Packages APPLICATIONS * Power source for battery-powered equipment. * Power source for cameras, video instruments such as camcorders, VCRs, and hand- held communication equipment. * Precision voltage references. BLOCK DIAGRAM VIN 2 3 VOUT + - Vref 1 GND 1 Rx5RE SELECTION GUIDE The package type, the output voltage, the packing type, and the taping type of Rx5RE Series can be designated at the user's request by specifying the part number as follows. Rx5RExxxx-xx Part Number } } a b cd e Code Contents a Designation of Package Type: E: TO-92 H: SOT-89 (Mini-power Mold) Setting Output Voltage (VOUT): Stepwise setting with a step of 0.1V in the range of 2.0V to 6.0V is possible. A Designation of Packing Type: A: Taping C: Antistatic bag for TO-92 and samples Designation of Taping Type: Ex. TO-92 : RF, RR, TZ SOT-89: T1, T2 (refer to Taping Specifications) "TZ" and "T1" are prescribed as a standard. b c d e For example, the product with Package Type SOT-89,Output Voltage 5.0V,Version A and Taping Type T1 are designated by Part Number RH5RE50AA-T1. 2 Rx5RE PIN CONFIGURATION * TO-92 * SOT-89 (mark side) (mark side) 1 2 3 1 2 3 PIN DESCRIPTION * TO-92 Pin No. Symbol * SOT-89 Pin No. Symbol 1 2 3 GND VIN VOUT 1 2 3 GND VIN VOUT 3 Rx5RE ABSOLUTE MAXIMUM RATINGS Symbol Item Rating Unit VIN VOUT IOUT PD Topt Tstg Tsolder Input Voltage Output Voltage Output Current Power Dissipation Operating Temperature Storage Temperature Lead Temperature (Soldering) +12 -0.3 to VIN+0.3 300 300 -40 to +85 -55 to +25 260C, 10s V V mA mW C C ABSOLUTE MAXIMUM RATINGS Absolute Maximum ratings are threshold limit values that must not be exceeded even for an instant under any conditions. Moreover, such values for any two items must not be reached simultaneously. Operation above these absolute maximum ratings may cause degradation or permanent damage to the device. These are stress ratings only and do not necessarily imply functional operation below these limits. 4 Rx5RE ELECTRICAL CHARACTERISTICS Topt=25C Symbol Item Conditions MIN. TYP. MAX. Unit VOUT IOUT VOUT IOUT VDIF ISS VOUT VIN VIN Ilim VOUT Topt Output Voltage Output Current Load Regulation Dropout Voltage Quiescent Current Line Regulation Input Voltage Current Limit Output Voltage Temperature Coefficient VIN=4.0V,IOUT=10mA VIN=4.0V VIN=4.0V 1mAIOUT50mA IOUT=30mA VIN=4.0V IOUT=10mA VOUT+1.0VVIN10V 1.950 40 2.000 60 40 0.5 1.0 0.1 2.050 V mA 80 0.7 3.0 mV V A %/V 10 240 IOUT=10mA -40CTopt85C 100 V mA ppm/C * Rx5RE30A Symbol Item Conditions MIN. TYP. MAX. Topt=25C Unit VOUT IOUT VOUT IOUT VDIF ISS VOUT VIN VIN Ilim VOUT Topt Output Voltage Output Current Load Regulation Dropout Voltage Quiescent Current Line Regulation Input Voltage Current Limit Output Voltage Temperature Coefficient VIN=5.0V,IOUT=10mA VIN=5.0V VIN=5.0V 1mAIOUT60mA IOUT=40mA VIN=5.0V IOUT=10mA VOUT+1.0VVIN10V 2.925 50 3.000 80 40 0.5 1.1 0.1 3.075 V mA 80 0.7 3.3 mV V A %/V 10 240 IOUT=10mA -40CTopt85C 100 V mA ppm/C 5 Rx5RE * Rx5RE40A Symbol Item Conditions MIN. TYP. MAX. Topt=25C Unit VOUT IOUT VOUT IOUT VDIF ISS VOUT VIN VIN Ilim VOUT Topt Output Voltage Output Current Load Regulation Dropout Voltage Quiescent Current Line Regulation Input Voltage Current Limit Output Voltage Temperature Coefficient VIN=6.0V,IOUT=10mA VIN=6.0V VIN=6.0V 1mAIOUT70mA IOUT=50mA VIN=6.0V IOUT=10mA VOUT+1.0VVIN10V 3.900 65 4.000 100 40 0.5 1.2 0.1 4.100 V mA 80 0.7 3.6 mV V A %/V 10 240 IOUT=10mA -40CTopt85C 100 V mA ppm/C * Rx5RE50A Symbol Item Conditions MIN. TYP. MAX. Topt=25C Unit VOUT IOUT VOUT IOUT VDIF ISS VOUT VIN VIN Ilim VOUT Topt Output Voltage Output Current Load Regulation Dropout Voltage Quiescent Current Line Regulation Input Voltage Current Limit Output Voltage Temperature Coefficient VIN=7.0V,IOUT=10mA VIN=7.0V VIN=7.0V 1mAIOUT80mA IOUT=60mA VIN=7.0V IOUT=10mA VOUT+1.0VVIN10V 4.875 80 5.000 120 40 0.5 1.3 0.1 5.125 V mA 80 0.7 3.9 mV V A %/V 10 240 IOUT=10mA -40CTopt85C 100 V mA ppm/C 6 Rx5RE * Rx5RE60A Symbol Item Conditions MIN. TYP. MAX. Topt=25C Unit VOUT IOUT VOUT IOUT VDIF ISS VOUT VIN VIN Ilim VOUT Topt Output Voltage Output Current Load Regulation Dropout Voltage Quiescent Current Line Regulation Input Voltage Current Limit Output Voltage Temperature Coefficient VIN=8.0V,IOUT=10mA VIN=8.0V VIN=8.0V 1mAIOUT80mA IOUT=60mA VIN=8.0V IOUT=10mA VOUT+1.0VVIN10V 5.850 80 6.000 120 40 0.5 1.4 0.1 6.150 V mA 80 0.7 4.2 mV V A %/V 10 240 IOUT=10mA -40CTopt85C 100 V mA ppm/C 7 Rx5RE ELECTRICAL CHARACTERISTICS BY OUTPUT VOLTAGE Output Voltage Part Number Conditions OutputCurrent IOUT(mA) MAX. Conditions MIN. TYP. Load Regulation Dropout Voltage VDIF(V) Conditions TYP. MAX. VOUT(V) MIN. TYP. VOUT/IOUT(mV) Conditions TYP. MAX. Rx5RE20A Rx5RE21A Rx5RE22A Rx5RE23A Rx5RE24A Rx5RE25A Rx5RE26A Rx5RE27A Rx5RE28A Rx5RE29A Rx5RE30A Rx5RE31A Rx5RE32A Rx5RE33A Rx5RE34A Rx5RE35A Rx5RE36A Rx5RE37A Rx5RE38A Rx5RE39A Rx5RE40A Rx5RE41A Rx5RE42A Rx5RE43A Rx5RE44A Rx5RE45A Rx5RE46A Rx5RE47A Rx5RE48A Rx5RE49A Rx5RE50A Rx5RE51A Rx5RE52A Rx5RE53A Rx5RE54A Rx5RE55A Rx5RE56A Rx5RE57A Rx5RE58A Rx5RE59A Rx5RE60A 1.950 2.048 2.145 2.243 2.340 2.438 2.535 2.633 2.730 2.828 2.925 3.023 3.120 3.218 3.315 3.413 VIN- 3.510 VOUT 3.608 =2.0V 3.705 3.803 3.900 3.998 IOUT 4.095 =10mA 4.193 4.290 4.388 4.485 4.583 4.680 4.778 4.875 4.973 5.070 5.168 5.265 5.363 5.460 5.558 5.655 5.753 5.850 2.000 2.100 2.200 2.300 2.400 2.500 2.600 2.700 2.800 2.900 3.000 3.100 3.200 3.300 3.400 3.500 3.600 3.700 3.800 3.900 4.000 4.100 4.200 4.300 4.400 4.500 4.600 4.700 4.800 4.900 5.000 5.100 5.200 5.300 5.400 5.500 5.600 5.700 5.800 5.900 6.000 2.050 2.152 2.255 2.357 2.460 2.562 2.665 2.767 2.870 2.972 3.075 3.177 3.280 3.382 3.485 3.587 3.690 3.792 3.895 3.997 4.100 4.202 4.305 4.407 4.510 4.612 4.715 4.817 4.920 5.022 5.125 5.227 5.330 5.432 5.535 5.637 5.740 5.842 5.945 6.047 6.150 VIN- VOUT =2.0V 1mA IOUT 50mA VIN- VOUT =2.0V 40 60 IOUT =30mA 1mA IOUT 60mA 50 80 VIN- VOUT =2.0V 40 80 0.5 0.7 IOUT =40mA VIN- VOUT =2.0V 1mA IOUT 70mA 65 100 IOUT =50mA VIN- VOUT =2.0V 1mA 80 120 IOUT 80mA IOUT =60mA 8 Rx5RE Topt=25C Quiescent Current Iss(A) Conditions TYP. MAX. Line Regulation Input Voltage Current Limit Output Voltage Tempco. VOUT/VIN(%/V) VIN(V) Ilim(mA) VOUT/T(ppm/C) Conditions TYP. MAX. TYP. Conditions TYP. 1.0 3.0 1.1 3.3 IOUT =10mA VIN- VOUT =2.0V 1.2 3.6 VOUT+ 1.0V VIN 10V 0.1 10 240 -40C Topt 85C IOUT =10mA 100 1.3 3.9 1.4 4.2 9 Rx5RE OPERATION Output Voltage VOUT divided at the node between VIN Error Amplifire - + Vref R2 GND FIG. 1 Brock Diagram VOUT Registers R1 and R2 is compared with Reference Voltage by Error Amplifier, so that a constant voltage is output. R1 GND TEST CIRCUITS VIN Rx5RE SERIES VIN VOUT IOUT VOUT VIN ISS VIN Rx5RE SERIES VOUT CI 1F + GND + Co 1F CI + 1F GND FIG. 2 Test Circuit FIG. 3 Quiescent Current Test Circuit VIN Rx5RE SERIES VOUT VOUT P.G GND Co 0.1F + Ro FIG. 4 Line Transient Response Test Circuit 10 Rx5RE TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current Rx5RE30A 3.1 Topt= -40C Output Voltage VOUT(V) 3.0 25C 2.9 85C 2.8 Output Voltage VOUT(V) Topt=-40C 4.0 25C 3.9 VIN=5.0V 4.1 Rx5RE40A VIN=6.0V 3.8 85C 2.7 0 50 100 150 200 Output Current IOUT(mA) 250 3.7 0 150 50 100 Output Current IOUT(mA) 200 Rx5RE50A 5.1 Output Voltage VOUT(V) VIN=7.0V Rx5RE50A 5.1 Output Voltage VOUT(V) 5.0 4.9 4.8 4.7 heatsink 30x30x1mm VIN=7.0V Topt=-40C 5.0 25C 4.9 85C 4.8 with heatsink without heatsink 4.7 0 50 100 150 200 250 300 350 Output Current IOUT(mA) 0 50 100 150 200 Output Current IOUT(mA) 250 2) Output Voltage vs. Input Voltage 2.4 2.2 Output Voltage VOUT(V) 2.0 1.8 1.6 10mA 1.4 1.2 1.0 0.8 1.0 1mA IOUT=1A Topt=25C Rx5RE20A 2.04 Output Voltage VOUT(V) Topt=25C 2.02 IOUT=1A 2.00 1mA 1.98 10mA 1.96 2.0 3.0 4.0 Input Voltage VIN(V) 5.0 2 3 4 5 6 Input Voltage VIN(V) 7 11 Rx5RE Rx5RE30A 3.4 3.2 Output Voltage VOUT(V) Topt=25C Rx5RE30A 3.00 Output Voltage VOUT(V) 2.99 IOUT=1A 2.98 2.97 2.96 2.95 3.0 1mA 10mA Topt=25C 3.0 IOUT=1mA 2.8 2.6 2.4 2.2 2.0 1.8 2.0 10mA 50mA 2.5 3.0 3.5 4.0 Input Voltage VIN(V) 4.5 4.0 5.0 6.0 7.0 Input Voltage VIN(V) 8.0 Rx5RE40A 4.2 Output Voltage VOUT(V) 4.0 IOUT=1mA 3.8 3.6 50mA 3.4 10mA 3.2 2.5 Topt=25C 4.06 Output Voltage VOUT(V) 4.04 4.02 4.00 Rx5RE40A Topt=25C IOUT=1A 1mA 3.98 3.96 10mA 3.5 4.5 5.5 Input Voltage VIN(V) 4 5 6 7 8 Input Voltage VIN(V) 9 Rx5RE50A 5.1 Output Voltage VOUT(V) 5.0 4.8 4.6 4.4 4.2 4.0 Topt=25C Rx5RE50A 5.05 5.04 Output Voltage VOUT(V) 5.03 5.02 5.01 5.00 4.99 4.98 4.97 4.96 4.95 Topt=25C IOUT=1mA 10mA 50mA IOUT=1A 1mA 10mA 4.5 5.0 5.5 6.0 Input Voltage VIN(V) 6.5 5 6 7 8 9 Input Voltage VIN(V) 10 12 Rx5RE 3) Dropout Voltage vs. Output Curret Rx5RE30A 1.4 Dropout Voltage VDIF(V) Dropout Voltage VDIF(V) 1.2 85C 1.0 0.8 0.6 0.4 0.2 0.0 0 20 40 60 80 Output Current IOUT(mA) 100 Topt=-40C 0.0 0 20 40 60 80 Output Current IOUT(mA) 100 25C 1.0 0.8 85C 0.6 25C 0.4 0.2 Topt=-40C Rx5RE40A Rx5RE50A 0.8 0.7 Dropout Voltage VDIF(V) 0.6 0.5 25C 0.4 0.3 0.2 0.1 0.0 0 20 40 60 80 Output Current IOUT(mA) 100 Topt= -40C 85C 4) Output Voltage vs.Temperature Rx5RE30A 3.1 Output Voltage VOUT(V) IOUT=10mA Rx5RE40A 4.1 Output Voltage VOUT(V) IOUT=10mA 3.0 4.0 2.9 -50 -30 -10 10 30 50 70 Temperature Topt(C) 90 3.9 -50 -30 -10 10 30 50 70 Temperature Topt(C) 90 13 Rx5RE Rx5RE50A 5.2 Output Voltage VOUT(V) IOUT=10mA 5.1 5.0 4.9 4.8 -50 -30 -10 10 30 50 70 Temperature Topt(C) 90 5) Quiescent Current vs. Input Voltage Rx5RE20A 1.1 Quiescent Current Iss(A) 1.0 Topt=25C Quiescent Current Iss(A) Rx5RE30A 1.4 Topt=25C 1.3 0.9 0.8 0.7 0.6 3 4 5 6 7 8 Input Voltage VIN(V) 9 10 1.2 1.1 1.0 2 3 4 56 78 Input Voltage VIN(V) 9 10 Rx5RE40A 1.5 Quiescent Current Iss(A) 1.4 1.3 1.2 1.1 1.0 Topt=25C Quiescent Current Iss(A) 1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 4 5 6 7 8 9 10 Input Voltage VIN(V) 11 0.5 5 6 Rx5RE50A Topt=25C 7 8 9 10 11 Input Voltage VIN(V) 12 14 Rx5RE 6) Quiescent Current vs. Temperature Rx5RE20A 1.7 Quiescent Current Iss(A) 1.5 1.3 1.1 0.9 0.7 0.5 -40 -20 VIN=4.0V 1.6 Quiescent Current Iss(A) Rx5RE30A VIN=5.0V 1.4 1.2 1.0 0 20 40 60 80 100 Temperature Topt(C) 0.8 -40 -20 0 20 40 60 80 100 Temperature Topt(C) Rx5RE40A 1.7 Quiescent Current Iss(A) 1.5 1.3 1.1 0.9 0.7 0.5 -40 -20 VIN=6.0V Rx5RE50A 1.5 1.4 Quiescent Current Iss(A) 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 -40 -20 VIN=7.0V 0 20 40 60 80 100 Temperature Topt(C) 0 20 40 60 80 100 Temperature Topt(C) 7) Dropout Voltage vs. Set Output Voltage 0.7 Dropout Voltage VDIF(V) 0.6 0.5 IOUT=50mA 0.4 0.3 0.2 10mA 0.1 0.0 0 1mA 1 2 3 4 5 Set Output Voltage Vreg(V) 6 Rx5RE SERIES Topt=25C 15 Rx5RE 8) Line Transient Response (1) Rx5RE20A Input Voltage/Output Voltage V(V) 5.0 4.5 4.5 3.5 3.0 2.5 2.0 1.5 1.0 1.5 2.0 2.5 3.0 3.5 Time t(ms) Output Voltage Input Voltage IOUT=1mA Input Voltage/Output Voltage V(V) Rx5RE30A 7.0 6.0 5.0 4.0 Output Voltage 3.0 2.0 1.0 1.5 Input Voltage IOUT=1mA 4.0 4.5 2.0 2.5 3.0 3.5 Time t(ms) 4.0 4.5 Rx5RE40A 8.0 Input Voltage/Output Voltage V(V) 7.0 6.0 5.0 Input Voltage IOUT=1mA Input Voltage/Output Voltage V(V) Rx5RE50A 9.0 8.0 7.0 6.0 Output Voltage 5.0 4.0 3.0 0 Input Voltage IOUT=1mA Output Voltage 4.0 3.0 2.0 1.5 2.0 2.5 3.0 3.5 Time t(ms) 4.0 4.5 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Time t(ms) 9) Line Transient Response (2) Rx5RE20A Input Voltage/Output Voltage V(V) 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 1.5 2.0 2.5 3.0 3.5 Time t(ms) 4.0 4.5 Output Voltage Input Voltage IOUT=30mA Input Voltage/Output Voltage V(V) Rx5RE30A 7.0 6.0 5.0 4.0 3.0 2.0 1.0 1.5 Input Voltage IOUT=30mA Output Voltage 2.0 2.5 3.0 3.5 Time t(ms) 4.0 4.5 16 Rx5RE Rx5RE40A Input Voltage/Output Voltage V(V) 8.0 7.0 6.0 5.0 Input Voltage IOUT=30mA Input Voltage/Output Voltage V(V) 9.0 8.0 7.0 6.0 Rx5RE50A IOUT=30mA Input Voltage Output Voltage 4.0 3.0 2.0 1.5 2.0 2.5 3.0 3.5 Time t(ms) 4.0 4.5 Output Voltage 5.0 4.0 3.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Time t(ms) 17 Rx5RE TYPICAL APPLICATION In Rx5RE Series, a constant voltage can be obtained VIN C1 VIN + Rx5RE SERIES GND VOUT + C2 without using Capacitors C1 and C2. However, when the VOUT wire connected to VIN is long, use Capacitor C1. Output noise can be reduced by using Capacitor C2. Insert Capacitors C1 and C2 with the capacitance of 0.1F to 2.0F between Input/Output Pins and GND Pin with minimum wiring. GND GND APPLICATION CIRCUITS * VOLTAGE BOOST CIRCUIT The output voltage can be obtained by the following formula : VIN VIN Rx5RE SERIES GND C1 + ISS GND R2 VOUT VOUT + *1 VOUT=Vreg * (1+R2/R1) + ISS * R2 Since the quiescent current of Rx5RE Series is so small that the resistances of R1 and R2 can be set as large as several hundreds k and therefore the supply current of "Voltage Boost Circuit" itself can be reduced. Furthermore, since Rx5RE Series are operated by a constant voltage, the supply current of "Voltage Boost Circuit" is not substantially affected by the input voltage. C2 R1 *1) Vreg : Set Output Voltage of Rx5RE Series. * DUAL POWER SUPPLY CIRCUIT As shown in the circuit diagram, a dual power supIC1 VIN VIN Rx5RE20A VOUT C1 GND IC2 VIN Rx5RE30A C2 GND + GND GND C3 + R VOUT VOUT2 3V + D ISS VOUT1 5V ply circuit can be constructed by using two Rx5RE Series. This circuit diagram shows a dual power supply circuit with an output of 3V and an output of 5V. When the minimum output current of IC2 is larger than ISS of IC1, Resistor R is unnecessary. Diode D is a protection diode for the case where VOUT2 becomes larger than VOUT1. 18 Rx5RE * CURRENT BOOST CIRCUIT Output current of 120mA or more can be obtained Tr.1 by the current boost circuit constructed as shown in this circuit diagram. VIN Rx5RE SERIES GND VOUT VOUT + C2 GND VIN C1 GND + * CURRENT BOOST CIRCUIT WITH OVERCURRENT LIMIT CIRCUIT A circuit for protecting Tr.1 from the destruction caused by output short-circuit or overcurrent is shown in R2 Vbe2 Tr.2 VIN VIN + R1 Rx5RE SERIES GND GND GND VOUT + VOUT C2 IOUT Tr.1 this circuit diagram. When the voltage reduction caused by the current ( aa IOUT) which flows through R2 reaches Vbe2 of Tr.2 by additionally providing the current boost circuit with Tr.2 and R2, Tr.2 is turned ON and the base current of Tr.1 is increased, so that the output current is limited. Current limit of Overcurrent Limit Circuit is obtained as follows : IOUT Vbe2/R2 * CURRENT SOURCE A current source with the structure as shown in IOUT VIN VIN Rx5RE SERIES GND VOUT R ISS this circuit diagram can be used. Output Current IOUT is obtained as follows : *1 IOUT=Vreg /R + ISS Take care that Output Current IOUT does not exceed its allowable current. C1 + *1) Vreg : Set Output Voltage of Rx5RE Series. 19 |
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