2000. 3.13 LOW NOISE 150mA LDO REGULATOR R1122N SERIES n OUTLINE The R1122N Series are voltage regulator ICs with high output voltage accuracy, extremely low supply current, low ONresistance and high ripple rejection by CMOS process. Each of these voltage regulator ICs consists of a voltage reference unit, an error amplifier, resistors, a current limit circuit, and a chip enable circuit. These ICs perform with low dropout voltage and a chip enable function. The line transient response and load transient response of the R1122N Series are excellent, thus these ICs are very suitable for the power supply for hand-held communication equipment. The output voltage of these ICs is fixed with high accuracy. Since the package for these ICs are SOT-23-5 (Mini-mold) package, high density mounting of the ICs on boards is possible. n FEATURES l l l l l l l l l Ultra-Low Supply Current.................................................TYP. 100mA Standby Mode ...................................................................TYP. 0.1mA Low Dropout Voltage ........................................................TYP. 0.19V (IOUT = 100mA, 3V Output type) High Ripple Rejection .......................................................TYP. 80dB (f = 1kHz) Low Temperature-Drift Coefficient of Output Voltage .....TYP. 100ppm/C Excellent Line Regulation .................................................TYP. 0.05%/V High Accuracy Output Voltage..........................................2.0% Small Package ..................................................................SOT-23-5 (Mini-mold) Output Voltage ..................................................................Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V is possible. Built-in chip enable circuit (2 Types; A: active "L", B: active "H") Built-in Fold-back protection circuit .................................Short Current Typ. 30mA Pinout ................................................................................Similar to the TK112, TK111 Ceramic Capacitors are Recommendable to be used with this IC. l l l l n APPLICATIONS l l l Power source for cellular phones such as GSM, CDMA, PCS and so forth. Power source for domestic appliances such as cameras, VCRs and camcorders. Power source for battery-powered equipment. Rev. 1.10 -1- n BLOCK DIAGRAM R1122NXX1A 3 R1122NXX1B 1 VDD 3 VDD VOUT Vref VOUT Vref Current Limit CE 1 4 GND CE 2 Current Limit 4 GND 2 n SELECTION GUIDE The output voltage, the active type, 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 : R1122NXX1X-XX - - a b c Code a b c Rev. 1.10 Part Number Contents Setting Output Voltage (VOUT) : Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V is possible. Designation of Active Type : A : active "L" type B : active "H" type Designation of Taping Type : Ex. TR, TL (refer to Taping Specifications; TR type is the standard direction.) -2- n PIN CONFIGURATION SOT-23-5 5 4 NC CE (mark side) VOUT GND VDD 1 2 3 n PIN DESCRIPTION Pin No. Rev. 1.10 Symbol Description 1 VOUT Output pin 2 GND Ground Pin 3 VDD Input Pin 4 CE or CE Chip Enable Pin 5 NC No Connection -3- n ABSOLUTE MAXIMUM RATINGS Symbol VIN VCE VOUT IOUT PD Topt Tstg Item Input Voltage Input Voltage (CE or CE Pin) Output Voltage Output Current Power Dissipation Operating Temperature Range Storage Temperature Range Rating 7.0 -0.3 ~ VIN+0.3 -0.3~ VIN+0.3 200 250 Unit V V V mA mW -40 ~ 85 C -55 ~ 125 C n ELECTRICAL CHARACTERISTICS l R1122NXX1A Symbol Item VOUT Output Voltage IOUT Output Current DVOUT/DIOUT Load Regulation VDIF Dropout Voltage ISS Istandby Supply Current Supply Current (Standby) DVOUT/DVIN Line Regulation RR Ripple Rejection VIN Input Voltage Output Voltage Temperature Coefficient Short Current Limit CE Pull-up Resistance CE Input Voltage "H" CE Input Voltage "L" Output Noise DVOUT/DT Ilim RPU VCEH VCEL en Rev. 1.10 Topt = 25C MAX. Unit VOUT V 1.02 Conditions MIN. TYP. VIN = Set VOUT+1V VOUT 1mA IOUT 30mA 0.98 VIN = Set VOUT+1V 150 mA When VOUT = Set VOUT-0.1V VIN = Set VOUT+1V 12 40 mV 1mA IOUT 80mA refer to the ELECTICAL CHARACTERISTICS by OUTPUT VOLTAGE VIN = Set VOUT+1V 100 170 mA VIN = VCE = Set VOUT+1V 0.1 1.0 mA Set VOUT+0.5V VIN 8V 0.05 0.20 %/V IOUT = 30mA f = 1KHz, Ripple 0.5Vp-p 80 dB VIN = Set VOUT+1V 2.0 6.0 V ppm IOUT = 30mA 100 -40C Topt 85C /C VOUT = 0V 30 mA 2.5 5 10 MW 1.5 VIN V 0 0.25 V BW = 10Hz ~ 100kHz 30 mVrms -4- l R1122NXX1B Symbol VOUT Output Voltage IOUT Output Current DVOUT/DIOUT Load Regulation VDIF Dropout Voltage ISS Supply Current Istandby Supply Current (Standby) DVOUT/DVIN Line Regulation RR Ripple Rejection VIN Input Voltage Output Voltage Temperature Coefficient Short Current Limit CE Pull-down Resistance CE Input Voltage "H" CE Input Voltage "L" Output Noise DVOUT/DT Ilim RPD VCEH VCEL en l Item Topt=25C MAX. Unit VOUT V 1.02 Conditions MIN. TYP. VIN = Set VOUT+1V VOUT 1mA IOUT 30mA 0.98 VIN = Set VOUT+1V 150 mA When VOUT = Set VOUT-0.1V VIN = Set VOUT+1V 12 40 mV 1mA IOUT 80mA refer to the ELECTICAL CHARACTERISTICS by OUTPUT VOLTAGE VIN = Set VOUT+1V 100 170 mA VIN = Set VOUT+1V 0.1 1.0 mA VCE = GND Set VOUT+0.5V VIN 8V 0.05 0.20 %/V IOUT = 30mA f = 1KHz, Ripple 0.5Vp-p 80 dB VIN = Set VOUT+1V 2.0 6.0 V ppm IOUT = 30mA 100 /C -40C Topt 85C VOUT = 0V 30 mA 2.5 5 10 MW 1.5 VIN V 0 0.25 V BW = 10Hz ~ 100kHz 30 mVrms ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE Output Voltage VOUT (V) 1.5 VOUT 1.6 1.7 VOUT 1.8 1.9 VOUT 2.3 2.4 VOUT 2.7 2.8 VOUT 5.0 Rev. 1.10 Topt = 25C Dropout Voltage VDIF (V) Conditions TYP. MAX. 0.32 0.55 0.28 0.47 IOUT = 100mA 0.25 0.35 0.20 0.29 0.19 0.26 -5- n OPERATION R1122XX1A 3 R1122XX1B 1 VDD 3 1 VDD VOUT VOUT R1 R1 Vref CE 4 Vref Current Limit R2 GND CE 2 4 Current Limit R2 GND 2 In these ICs, fluctuation of Output Voltage, VOUT is detected by Feed-back Registers, R1 and R2, and the result is compared with a reference voltage by Error Amplifier, so that a constant voltage is output. A current limit circuit for protection at short mode, and a chip enable circuit are included. Rev. 1.10 -6- n TEST CIRCUITS CE CE 4 IN 4 VOUT VDD 3 R1122Nxx1B R1121Nxx1B Series Series 1 OUT IN IOUT VDD 3 ISS VOUT R1122Nxx1B R1121Nxx1B Series Series 1 2.2F 2.2F 2 0.1F 2.2mF 2 GND GND 0.1F 2.2mF Fig.1 Standard test Circuit Fig.2 Supply Current Test Circuit CE CE 4 IN P.G VDD 3 4 R1122Nxx1B R1121Nxx1B Series Series VOUT 1 OUT IN VDD 3 IOUT 2 R1122Nxx1B R1121Nxx1B Series Series VOUT OUT 1 2 GND 1F 2.2mF Fig.3 Ripple Rejection, Line Transient Response Test Circuit Rev. 1.10 OUT GND I1 I2 Fig.4 Load Transient Response Test Circuit -7- n TECHNICAL NOTES When using these ICs, consider the following points: Phase Compensation In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this purpose, be sure to use a capacitor COUT with good frequency characteristics and ESR (Equivalent Series Resistance). (note: When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase compensation, the operation might be unstable. Because of this, test these ICs with as same external components as ones to be used on the PCB.) Recommended Capacitors; GRM40X5R225K6.3 (Murata) GRM40-034X5R335K6.3 (Murata) GRM40-034X5R475K6.3 (Murata) PCB Layout Make VDD and GND line sufficient. When the impedance of these is high, it would be a cause of picking up the noise or unstable operation. Connect a capacitor with a capacitance of 2.2mF or more between VDD and GND pin as close as possible. Set external components, especially output capacitor as close as possible to the ICs and make wiring shortest. Rev. 1.10 -8- n TYPICAL APPLICATION CE CE IN Cap. VDD R1122Nxx1A Series R1111NXX1A VOUT GND OUT IN Cap. Cap. R1122Nxx1B VDD Series R1111Nxx1B VOUT GND (External Components) Output Capacitor; Ceramic 2.2mF(Set Output Voltage in the range from 2.5 to 5.0V) Ceramic 4.7mF (Set Output Voltage in the range from 1.5 to 2.5V) Input Capacitor; Ceramic 2.2mF Rev. 1.10 -9- OUT Cap. n TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current R11x2N201B R11x2N151B 2.5 1.8 Output Voltage Vout[V] Output Voltage Vout[V] 1.6 1.4 VIN=2.0V 1.2 VIN=2.3V VIN=2.5V 1.5 VIN=2.5V 1 2 VIN=3.5V 0.8 0.6 VIN=3.0V VIN=4.0V 1 0.5 0.4 0.2 0 0 0 0 100 200 300 400 500 100 200 300 400 Output Current Iout[mA] 500 Output Current Iout[mA] R11x2N401B R11x2N301B 5 3.5 2.5 Output Voltage Vout[V] Output Voltage Vout[V] 3 VIN=3.3V VIN=3.5V 2 VIN=4.0V VIN=5.0V 1.5 1 4 VIN=4.3V 3 VIN=4.5V VIN=5.0V VIN=6.0V 2 1 0.5 0 0 0 100 200 300 400 Output Current Iout[mA] 0 500 R11x2N501B Output Voltage Vout[V] 6 5 VIN=5.3V 4 VIN=5.5V VIN=6.0V 3 VIN=7.0V 2 1 0 0 Rev. 1.10 100 200 300 400 Output Current Iout[mA] 500 - 10 - 100 200 300 400 Output Current Iout[mA] 500 2) Output Voltage vs. Input Voltage R11x2N201B 1.600 2.100 1.500 2.000 Output Voltage VOUT[V] Output Voltage VOUT[V] R11x2N151B 1.400 1.300 1.200 Iout=1mA 1.100 1.900 1.800 1.700 Iout=1mA 1.600 Iout=30mA Iout=30mA Iout=50mA Iout=50mA 1.000 1.500 1 2 3 4 5 6 7 1 2 3 Input Voltage VIN[V] R11x2N301B 5 6 7 R11x2N401B 3.100 4.500 Output Voltage VOUT[V] 3.000 Output Voltage VOUT[V] 4 Input Voltage VIN[V] 2.900 2.800 2.700 Iout=1mA 2.600 4.000 3.500 3.000 Iout=1mA Iout=30mA Iout=30mA Iout=50mA Iout=50mA 2.500 2.500 2 3 4 5 6 2 7 R11x2N501B Output Voltage VOUT[V] 5.500 5.000 4.500 4.000 3.500 Iout=1mA Iout=30mA Iout=50mA 2.500 2 3 4 5 6 7 Input Voltage VIN[V] Rev. 1.10 4 5 Input Voltage VIN[V] Input Voltage VIN[V] 3.000 3 - 11 - 6 7 3) Dropout Voltage vs. Output Current R11x2N151B R11x2N201B 0.600 0.500 Topt=-40C Dropout Voltage VDIF [V] Dropout Voltage VDIF [V] 0.600 Topt=25C 0.400 Topt=85C 0.300 0.200 0.100 0.500 Topt=25C 0.400 0 0.300 0.200 0.100 50 100 0 150 Output Current IOUT[mA] R11x2N301B 50 100 Output Current IOUT[mA] 150 R11x2N401B 0.600 0.600 0.500 0.500 Topt=-40C Topt=25C 0.400 Topt=-40C Dropout Voltage VDIF[V] Dropout Voltage VDIF[V] Topt=85C 0.000 0.000 Topt=25C 0.400 Topt=85C 0.300 Topt=85C 0.300 0.200 0.200 0.100 0.100 0.000 0.000 0 50 100 150 0 Output Current IOUT[mA] R11x2N501B 0.600 Dropout Voltage VDIF[V] Topt=-40C 0.500 Topt=-40C 0.400 Topt=25C Topt=85C 0.300 0.200 0.100 0.000 0 50 100 150 Output Current IOUT[mA] Rev. 1.10 - 12 - 50 100 Output Current IOUT[mA] 150 4) Output Voltage vs. Temperature VIN=2.5V CIN=1mF VIN=3.0V CIN=1mF R11x2N151A/B COUT=2.2mFIOUT=30mA R11x2N201B Output Voltage VOUT[V] Output Voltage VOUT(V) 1.53 1.52 1.51 1.50 1.49 1.48 1.47 -50 -25 0 25 75 0 25 50 R11x2N401A/B IOUT=30mA 75 100 3.02 3.00 2.98 2.96 VIN=5.0V CIN=1mF COUT=2.2mF 4.08 Output Voltage V OUT(V) 3.04 IOUT=30mA 4.06 4.04 4.02 4.00 3.98 3.96 3.94 3.92 2.94 -50 -25 0 25 50 75 -50 100 R11x2N501A/B VIN=6.0V CIN=1mF COUT=2.2mF IOUT=30mA 5.10 5.08 5.06 5.04 5.02 5.00 4.98 4.96 4.94 4.92 4.90 -50 -25 0 25 50 75 100 Temperature Topt(C) Rev. 1.10 -25 0 25 50 75 Temperature Topt (C) Temperature Topt (C) Output Voltage VOUT(V) -25 Temperature Topt (C) VIN=4.0V CIN=1mF COUT=2.2mF 3.06 -50 100 Temperature Topt(C) R11x2N301A/B Output Voltage V OUT(V) 50 IOUT=30mA COUT=2.2mF 2.10 2.08 2.06 2.04 2.02 2.00 1.98 1.96 1.94 1.92 1.90 - 13 - 100 5) Supply Current vs. Input Voltage R11x2N151B R11x2N201B 100 Supply Current ISS{uA] 100 Supply Current ISS{uA] 120 120 80 60 40 20 80 60 40 20 0 0 1 2 3 4 5 6 7 1 2 Input Voltage VIN[V] 120 100 100 80 60 40 40 0 0 3 4 5 Input Voltage VIN[V] 6 1 7 120 100 80 60 40 20 0 1 Rev. 1.10 2 3 4 5 Input Voltage VIN[V] 2 3 4 5 Input Voltage VIN[V] R11x2N501B Supply Current ISS{uA] 60 20 2 7 80 20 1 6 R11x2N401B 120 Supply Current ISS{uA] Supply Current ISS{uA] R11x2N301B 3 4 5 Input Voltage VIN[V] 6 7 - 14 - 6 7 6) Supply Current vs. Temperature R11x2N151A/B R11x2N201A/B 150 100 50 0 150 100 50 0 -50 -25 0 25 50 75 Temperature Topt (C) 100 -50 -25 0 25 100 COUT=2.2mF 200 Supply Current Iss(uA) Supply Current Iss(uA) 75 VIN=5.0V CIN=1mF R11x2N401A/B COUT=2.2mF 200 150 100 50 0 150 100 50 0 -50 -25 0 25 50 75 100 -50 Temperature Topt(C) COUT=2.2mF 200 150 100 50 0 -50 -25 0 25 50 75 -25 0 25 50 75 Temperature Topt (C) VIN=6.0V CIN=1mF R11x2N501A/B Supply Current Iss(uA) 50 Temperature Topt(C) VIN=4.0V CIN=1mF R11x2N301A/B 100 Temperature Topt(C) Rev. 1.10 VIN=3.0V CIN=1mF COUT=2.2mF 200 Supply Current Iss(uA) Supply Current Iss(uA) 200 VIN=2.5V CIN=1mF COUT=2.2mF - 15 - 100 7) Ripple Rejection vs. Frequency VIN=3.0V+0.5Vp-p VIN=2.5V+0.5Vp-p R11x2N151A/B Ripple Rejection RR [dB] 90.00 R11x2N201A/B COUT=2.2mF IOUT=30mA Ripple Rejection RR [dB] 80.00 70.00 90.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.1 1 10 Frequency Freq [kHz] 100 0.1 1 10 Frequency Freq [kHz] VIN=4.0V+0.5Vp-p R11x2N401A/B 90.00 90.00 80.00 80.00 70.00 70.00 Ripple Rejection RR [dB] Ripple Rejection RR [dB] R11x2N301A/BCOUT=2.2mF IOUT=30mA 60.00 50.00 40.00 30.00 20.00 10.00 VIN=5.0V+0.5Vp-p COUT=2.2mF IOUT=30mA 60.00 50.00 40.00 30.00 20.00 0.00 0.1 1 10 100 Frequency Freq [kHz] VIN=6.0V+0.5Vp-p R11x2N501A/B COUT=2.2mF IOUT=30mA 90.00 Ripple Rejection RR [dB] 100 10.00 0.00 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.1 1 10 100 Frequency Freq [kHz] Rev. 1.10 COUT=2.2mF IOUT=30mA - 16 - 0.1 1 10 Frequency Freq [kHz] 100 8) Ripple Rejection vs. Input Voltage (DC bias) R11x2N301B 90.00 COUT =Ceramic 2.2mF R11x2N301B IOUT=1mA 90.00 IOUT=10mA 80.00 Ripple Rejection RR[dB] Ripple Rejection RR[dB 80.00 COUT =Ceramic 2.2mF 70.00 60.00 50.00 40.00 30.00 f=400Hz 20.00 f=1kHz 60.00 50.00 40.00 30.00 f=400Hz f=1kHz 20.00 f=10kHz f=10kHz 10.00 70.00 10.00 0.00 0.00 3.10 3.20 3.30 3.40 3.50 Input Voltage V IN [V] 3.10 3.20 3.30 3.40 Input Voltage VIN[V] 3.50 COUT =Ceramic 2.2mF R11x2N301B 90.00 IOUT=50mA Ripple Rejection RR[dB] 80.00 70.00 60.00 50.00 40.00 30.00 f=400Hz 20.00 f=1kHz f=10kHz 10.00 0.00 3.10 3.20 3.30 3.40 3.50 Input Voltage VIN[V] 9) Input Transient Response R11X2N151B Topt=25C VIN VIN=2.5V<-->3.5V IOUT=30mA CIN =none COUT=2.2mF tr/tf=5ms VOUT Rev. 1.10 - 17 - R11X2N201B Topt=25C VIN VIN=3.0V<-->4.0V IOUT=30mA CIN =none COUT=2.2mF tr/tf=5ms VOUT R11X2N301B Topt=25C VIN VIN=4.0V<-->5.0V IOUT=30mA CIN =none COUT=2.2mF tr/tf=5ms VOUT R11X2N401B Topt=25C VIN VIN=5.0V<-->6.0V IOUT=30mA CIN =none COUT=2.2mF tr/tf=5ms VOUT Rev. 1.10 - 18 - R11X2N501B Topt=25C VIN VIN=6.0V<-->7.0V IOUT=30mA CIN =none COUT=2.2mF tr/tf=5ms VOUT 10) Load Transient Response R11X2N151B Topt=25C IOUT IOUT=50mA<-->100mA VIN=2.5V CIN=2.2mF COUT=2.2mF tr/tf=5 s VOUT R11X2N201B Topt=25C IOUT IOUT=50mA<-->100mA VIN=3.0V CIN=2.2mF COUT=2.2mF tr/tf=5ms VOUT Rev. 1.10 - 19 - R11X2N301B Topt=25C IOUT IOUT=50mA<-->100mA VIN=4.0V CIN=2.2mF COUT=2.2mF tr/tf=5ms VOUT R11X2N401B Topt=25C IOUT IOUT=50mA<-->100mA VIN=5.0V CIN=2.2mF COUT=2.2mF tr/tf=5ms VOUT R11X2N501B Topt=25C IOUT IOUT=50mA<-->100mA VIN=6.0V CIN=2.2mF COUT=2.2mF tr/tf=5ms VOUT Rev. 1.10 - 20 - n TECHNICAL NOTES When using these ICs, be sure to consider following points: l Make VDD and GND line sufficient. When the impedance of these is high, there is a case to pick up the noise or not to work correctly. l Connect the capacitor with a capacitance as much as 2.2mF between VDD and GND as close as possible. l Set external components, especially Output Capacitor, as close as possible to the ICs and make wiring shortest. In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this purpose, be sure to use a capacitor COUT with good frequency characteristics and ESR (Equivalent Series Resistance) of which is in the range described as follows: 4 CE VOUT R1122NXX1B VIN 3 Ceramic Cap. VDD 2 1 Spectrum Analyzer Ceramic Cap. S.A. ESR GND IOUT Measuring Circuit for white noise; R1122NXX1B The relations between IOUT (Output Current) and ESR of Output Capacitor are shown below. The conditions when the white noise level is under 40mV(Avg.) are marked as the hatched area in the graph. (note: When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase compensation, the operation might be unstable. Because of this, test these ICs with as same external components as ones to be used on the PCB.) (1) VIN=VOUT+1V (2) Frequency band :10Hz to 1MHz (3) Temperature : 25C Rev. 1.10 - 21 - R11X2N151B R11X2N151B COUT=2.2uF,CIN=2.2uF COUT=4.7uF,CIN=2.2uF 10 10 ESR[Ohm] 100 ESR[Ohm] 100 1 1 0.1 0.1 0.01 0.01 0 30 60 90 120 0 150 30 R11X2N301B 10 10 1 120 150 1 0.1 0.1 0.01 0.01 90 120 150 0 30 60 90 IOUT[mA] IOUT[mA] Rev. 1.10 150 COUT=4.7uF,CIN=2.2uF 100 ESR[Ohm] ESR[Ohm] COUT=2.2uF,CIN=2.2uF 60 120 R11X2N301B 100 30 90 IOUT[mA] IOUT[mA] 0 60 - 22 -