RN5RG50AA

VOL TAGE REGULATOR WITH EXTERNAL POWER TRANSISTOR RN5RG SERIES APPLICATION MANUAL NO.EA-020-0006 VOLTAGE REGULATOR WITH EXTERNAL POWER TRANSISTOR RN5RG SERIES OUTLINE The RN5RG Series are voltage regulator ICs with an external power transistor with high output voltage accuracy and lowest supply current by CMOS process. Each of these voltage regulator ICs consists of a voltage reference unit, an error amplifier and resistors. These ICs are suitable for constructing regulators with ultra-low dropout voltage and an output current in the range of several tens mA to several hundreds mA. Furthermore, these ICs have a chip enable function, so that the supply current on standby can be minimized. Since the package for these ICs are SOT-23-5 (Mini-mold) package, high density mounting of the ICs on boards is possible. FEATURES • Ultra-Low Supply Current ..............................TYP. 50µA • Standby Mode.....................................................TYP. 0.2µA • Ultra-Low Dropout Voltage .............................TYP. 0.1V (IOUT=100mA : dependent on External Tr.) • Low Temperature-Drift Coefficient of Output Voltage ...................TYP. ±100 ppm/˚C • Excellent Line Regulation ................................TYP. 0.1%/V • 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). • High Accuracy Output Voltage ........................±2.5% • Small Package ..................................................SOT-23-5(Mini-Mold) APPLICATIONS • Power source for battery-powered equipment. • Power source for cameras, VCRs, camcorders, hand-held audio instruments, and hand-held communication equipment. • Power source for domestic appliances. BLOCK DIAGRAM VDD 2 4 EXT VOUT 3 + – Vref GND 1 CE 5 1 RN5RG SELECTION GUIDE The output voltage, the version, the packing type, and the taping type for the ICs can be selected at the user's request. The selection can be made by designating the part number as shown below : RN5RG ×××× – × × ← Part Number } } ↑ ↑↑ a bc ↑ d Code Contents a b 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: c A: Taping C: Antistatic bag for samples Designation of Taping Type: Ex. TR, TL d (refer to Taping Specifications) “TR” is prescribed as a standard. For example, the product with Output Voltage 5.0V, Version A, and Taping Type TR is designated by Part Number RN5RG50AA-TR. 2 RN5RG PIN CONFIGURATION • SOT-23-5 5 4 (mark side) 1 2 3 PIN DESCRIPTION Pin No. Symbol Description 1 2 3 4 5 GND VDD VOUT EXT CE Ground Pin Input Pin Output Pin External Transistor Drive Pin (Nch Open Drain Output) Chip Enable Pin ABSOLUTE MAXIMUM RATINGS Symbol Item Rating Unit VIN VCE VEXT IEXT PD Topt Tstg Tsolder Input Voltage Input Voltage (CE Pin) EXT Output Voltage EXT Output Current Power Dissipation Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering) +12 –0.3 to VIN+0.3 +12 50 150 –40 to +85 –55 to +125 260˚C,10s V 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. 3 R N5RG ELECTRICAL CHARACTERISTICS Symbol Item Conditions MIN. TYP. MAX. Unit Topt=25˚C Note VOUT IOUT IEXT ∆VOUT ∆IOUT VDIF ISS Istandby IEXTleak ∆VOUT ∆VIN VIN VEXT ∆VOUT ∆Topt VCEH VCEL ICEH ICEL (Note) Output Voltage Output Current EXT Current Load Regulation Dropout Voltage Supply Current Supply Current (Standby) EXT Leakage Current Line Regulation Input Voltage EXT Output Voltage Output Voltage Temperature Coefficient CE Input Voltage “H” CE Input Voltage “L” CE Input Current “H” CE Input Current “L” VIN=8.0V IOUT=50mA VIN–VOUT=1.0V VIN=4.0V, VEXT=2.0V VIN–VOUT=1.0V 1mA≤IOUT≤100mA IOUT=100mA VIN–VOUT=1.0V IOUT=0mA (at no load) VIN=8V × 0.975 1000 10 –60 100 50 0.01 0.2 VOUT × 1.025 VOUT V mA mA Note 60 200 80 1.0 0.5 mV mV µA µA µA %/V V V ppm/˚C V IOUT=50mA VOUT+0.5V≤VIN≤8V 0 0.1 0.3 8 8 IOUT=10mA –40˚C≤Topt≤85˚C 1.5 ±100 0.25 0 –5 –3 0.1 –0.1 V µA µA *) The output current depends upon the performance of External PNP Transistor. Use External PNP Transistor of a low saturation type, with an hFE of 100 or more. With respect to Test Circuits, refer to the Typical Application. 4 R N5RG OPERATION In these ICs, Output Voltage VOUT is detected by External PNP Transistor Feed-back Registers RA, RB, and the detected Output Voltage is compared with a reference voltage by Error Amplifier, so that the base current of External PNP OUT IN VDD 4 2 EXT RA VOUT 3 Error Amplifier + – Vref Transistor is adjusted and Output Voltage VOUT is regulated. RB 1 GND GND CE 5 SELECTION GUIDE FOR EXTERNAL COMPONENTS 1.External PNP Transistor External PNP Transistor VIN R1 R2 4 OUT Select External PNP Transistor from the viewpoints of output current, input voltage and power dissipation. Generally External PNP Transistor with low VCE (SAT) and high hFE is suitable. EXT 3 VOUT CL 2.Base Resistor R2 EXT Pin of these ICs is protected by a current limit circuit from the destruction caused by excess current. However, since this current limit circuit is provided for the purpose of protecting the IC, use a resistor R2 for the protection of the External Transistor, although this IC can be operated without such a resistor. It is required that the resistance of the Resistor R2 be determined with the input voltage, output voltage,output current, temperature, and the hFE value taken into consideration and the dispersion of these values. Before making such a determination, check the characteristics by calculating the respective values by using the following formula : VIN [MIN.] –1.2(V) R2 – 0.7(V) R1 > IOUT [MAX.] hFE 3.Phase Compensation In these ICs, phase compensation is made for securing stable operation even when the load current is varied. For this purpose, be sure to use a capacitor CL (tantalum type) with a capacitance of 10µF or more and a resistor R1 with a resistance of about 10kΩ between the base and the emitter.There may be the case the loop oscillation takes place when a tantalum capacitor CL with a large ESR is used, so select the CL carefully including the frequency characteristics. 5 R N5RG TEST CIRCUITS PNP PNP 10kΩ IN VDD 2 4 10kΩ IOUT IN OUT ISS VDD 2 2SA1213 EXT VOUT 3 2SA1213 EXT VOUT 4 3 OUT RN5RG SERIES 10 µF 5 10 µF 10 µF 1 RN5RG SERIES CE (2) 5 1 GND CE GND (1) Test Circuit 1 : Typical Characteristics 1) to 4) Test Circuit 2 : Typical Characteristics 5) to 7) PNP 10kΩ IN VDD 2 4 PNP 2SA1213 10kΩ IN Oscilloscope 1µF VDD 2 4 2SA1213 EXT VOUT 3 EXT VOUT 3 Oscilloscope RN5RG SERIES GND 10mA 1 5 P.G. RN5RG SERIES CL GND 1 5 300mA CE CE Test Circuit 3 : Typical Characteristics 8) to 10) Test Circuit 4 : Typical Characteristics 11) 6 R N5RG TYPICAL CHARACTERISTICS 1) Output Voltage vs. Input Voltage RN5RG50A 5.0 Output Voltage VOUT(V) Output Voltage VOUT(V) IOUT=0mA 4.5 IOUT=100mA IOUT=500mA 4.0 Topt=25˚C 3.2 3.1 3.0 2.9 2.8 2.7 2.6 2.5 2.4 2.3 3.0 3.0 2.2 4.0 5.0 6.0 7.0 Input Voltage VIN(V) 8.0 2 3 4 5 6 7 Input Voltage VIN(V) 8 IOUT=0mA IOUT=100mA IOUT=500mA RN5RG30A Topt=25˚C 3.5 2) Output Voltage vs.Output Current RN5RG50A 4.962 4.960 Output Voltage VOUT(V) 4.958 4.956 4.954 4.952 4.950 4.948 4.946 4.944 4.942 0 100 200 300 400 Output Current IOUT(mA) 500 5.1V Topt=25˚C VIN=6.0V Output Voltage VOUT(V) 2.974 2.972 2.970 2.968 3.1V 2.966 2.964 2.962 2.960 0 100 200 300 400 500 Output Current IOUT(mA) RN5RG30A Topt=25˚C VIN=4.0V 3) Dropout Voltage vs. Output Curret RN5RG50A 0.45 0.40 Dropout Voltage VDIF(V) 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 0 200 400 600 800 1000 Output Current IOUT(mA) –40˚C 25˚C Dropout Voltage VDIF(V) Topt=85˚C 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 0 200 400 600 800 Output Current IOUT(mA) 1000 –40˚C Topt=85˚C RN5RG30A 25˚C 7 R N5RG 4) Output Voltage vs.Temperature RN5RG30A VIN=4V,IOUT=10mA 3.05 Output Voltage Vout (V) Output Voltage Vout (V) 3.03 3.01 2.99 2.97 2.95 -60 -40 -20 5.1 5.08 5.06 5.04 5.02 5 0 20 40 60 80 100 RN5RG50A VIN=6V,IOUT=10mA -60 -40 -20 0 20 40 60 80 100 Temperature Topt (˚C) Temperature Topt (˚C) 5) Supply Current vs. Input Voltage RN5RG30A IOUT=0mA 100 90 Supply Current Iss(µA) Supply Current Iss(µA) 80 70 60 50 40 30 20 10 0 2 3 4 5 6 7 8 Input Voltage VIN(V) 85˚C Topt=-40˚C 25˚C 100 90 80 70 60 50 40 30 20 10 0 4 RN5RG50A IOUT=0mA Topt=-40˚C 25˚C 85˚C 5 6 Input Voltage VIN(V) 7 8 6) Supply Current vs. Temperature RN5RG30A VIN=4V,IOUT=0mA 60 Supply Current Iss(µA) 50 Supply Current Iss(µA) 40 30 20 10 0 -60 -40 -20 60 50 40 30 20 10 RN5RG50A VIN=6V,IOUT=0mA 0 20 40 60 80 100 0 -60 -40 -20 0 20 40 60 80 100 Temperature Topt (˚C) Temperature Topt (˚C) 8 R N5RG 7) Standby Current vs. Input Voltage RN5RG30A Standby Current Istandby(µA) Standby Current Istandby(µA) 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 1 2 3 4 5 6 7 8 Temperature Topt (˚C) –40˚C 25˚C Topt=85˚C RN5RG30A 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 1 2 3 4 5 6 7 8 Temperature Topt (˚C) –40˚C 25˚C Topt=85˚C 8) Ripple Rejection RN5RG50A 60 Ripple Rejection RR(dB) 50 9) Line Transient Response (1) Topt=25˚C 8 RN5RG50A Topt=25˚C IOUT=10mA 50 40 30 20 Output Voltage Deviation VOUT(V) Output Voltage Deviation VOUT(mV) Input Voltage 40 30 20 10 0 10 Input Voltage VIN(V) 7 6 10 Output Voltage 5 0 –10 100 1k 10k 100k Frequency f(Hz) 4 0 20 40 60 –20 80 100 120 140 CL=10 µF IOUT=200mA VIN=6Vdc+0.5(p-p) Time t(µs) CL=1µF 10) Line Transient Response (2) 8 11) Load Transient Response RN5RG50A Topt=25˚C IOUT=100mA Input Voltage RN5RG50A Output Voltage Deviation VOUT(mV) 50 40 30 20 500 400 Output Current IOUT(mA) 300 200 100 0 –100 –200 –300 0 4 8 12 16 Time t(ms) Output Voltage Output Current Topt=25˚C VIN=6.0V 500 400 300 200 100 0 Input Voltage VIN(V) 7 6 Output Voltage 5 10 0 –10 4 0 20 40 –20 60 80 100 120 140 Time t(µs) 20 –100 24 140 CL=1µF CL=1µF 9 R N5RG TYPICAL APPLICATION PNP Tr EXT IN + Cap. VDD RN5RG SERIES VOUT + OUT Cap. GND CE Parts Transistor : 2SA1213 Resistor : 10kΩ Capacitor : 10µF(tantalum type) 10