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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 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.
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 R1122NXX1B
3 VDD
1 VOUT
3 VDD
1 VOUT
Vref CE 4 Current Limit GND 2 CE 4
Vref Current Limit 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 -- ab c Code a b c 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.)
Rev. 1.10
-2-
n PIN CONFIGURATION
SOT-23-5
5 4
NC (mark side) VOUT GND
CE
VDD
1
2
3
n PIN DESCRIPTION
Pin No. 1 2 3 4 5 Symbol VOUT GND VDD CE or CE NC Description Output pin Ground Pin Input Pin Chip Enable Pin No Connection
Rev. 1.10
-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 -40 ~ 85 -55 ~ 125 Unit V V V mA mW C C
n ELECTRICAL CHARACTERISTICS
l R1122NXX1A Symbol VOUT IOUT DVOUT/DIOUT VDIF ISS Istandby DVOUT/DVIN RR VIN DVOUT/DT Ilim RPU VCEH VCEL en Item 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 Topt = 25C MAX. Unit VOUT V 1.02
Output Voltage Output Current Load Regulation Dropout Voltage Supply Current Supply Current (Standby) Line Regulation Ripple Rejection Input Voltage Output Voltage Temperature Coefficient Short Current Limit CE Pull-up Resistance CE Input Voltage "H" CE Input Voltage "L" Output Noise
Rev. 1.10
-4-
l
R1122NXX1B Symbol VOUT IOUT DVOUT/DIOUT VDIF ISS Istandby DVOUT/DVIN RR VIN DVOUT/DT Ilim RPD VCEH VCEL en
Item Output Voltage Output Current Load Regulation Dropout Voltage Supply Current Supply Current (Standby) Line Regulation Ripple Rejection Input Voltage Output Voltage Temperature Coefficient Short Current Limit CE Pull-down Resistance CE Input Voltage "H" CE Input Voltage "L" Output Noise
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
Topt=25C MAX. Unit VOUT V 1.02
l
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 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
Rev. 1.10
-5-
n OPERATION
R1122XX1A R1122XX1B
3 VDD
1 VOUT
3 VDD
1 VOUT
R1 Vref CE 4 Current Limit R2 GND CE 4 Vref Current Limit
R1
R2
GND
2
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 4 4 CE
IN
VDD 3
VOUT
R1122Nxx1B R1121Nxx1B Series Series
1
OUT IOUT 2.2F
IN ISS
VDD 3
VOUT
R1122Nxx1B R1121Nxx1B Series Series
1
OUT
2.2F 2 0.1F 2.2mF GND
2 0.1F 2.2mF GND
Fig.1 Standard test Circuit
Fig.2 Supply Current Test Circuit
CE 4
CE 4
IN
VDD 3
R1122Nxx1B R1121Nxx1B Series Series
VOUT 1
OUT IOUT
IN
VDD 3
R1122Nxx1B R1121Nxx1B Series Series
VOUT 1
OUT
P.G
2 GND
2 1F 2.2mF GND I1 I2
Fig.3 Ripple Rejection, Line Transient Response Test Circuit
Fig.4 Load Transient Response Test Circuit
Rev. 1.10
-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
R1122Nxx1A VDD Series R1111NXX1A VOUT
OUT
IN
R1122Nxx1B VDD Series R1111Nxx1B VOUT
OUT
Cap.
GND
Cap.
Cap.
GND
Cap.
(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-
n TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current
R11x2N151B 1.8 1.6 Output Voltage Vout[V] 1.4 1.2 1 0.8 0.6 0.4 0.2 0 0 100 200 300 400 500 Output Current Iout[mA]
VIN=2.0V VIN=2.5V VIN=3.5V
R11x2N201B 2.5 Output Voltage Vout[V] 2
VIN=2.3V VIN=2.5V VIN=3.0V VIN=4.0V
1.5 1
0.5 0 0 100 200 300 400 Output Current Iout[mA] 500
R11x2N301B 3.5 Output Voltage Vout[V] Output Voltage Vout[V] 3 2.5 2 1.5 1 0.5 0 0 100 200 300 400 Output Current Iout[mA] R11x2N501B 500 0 0 100
VIN=3.3V VIN=3.5V VIN=4.0V VIN=5.0V
R11x2N401B 5 4 3 2 1
VIN=4.3V VIN=4.5V VIN=5.0V VIN=6.0V
200 300 400 Output Current Iout[mA]
500
6 Output Voltage Vout[V] 5 4 3 2 1 0 0 100 200 300 400 Output Current Iout[mA] 500
VIN=5.3V VIN=5.5V VIN=6.0V VIN=7.0V
Rev. 1.10
- 10 -
2)
Output Voltage vs. Input Voltage
R11x2N151B 1.600 1.500 Output Voltage VOUT[V] 1.400 1.300 1.200
Iout=1mA
R11x2N201B 2.100 2.000 1.900 1.800 1.700
Iout=1mA
Output Voltage VOUT[V]
1.100 1.000 1 2 3 4 5
Iout=30mA Iout=50mA
1.600 1.500
Iout=30mA Iout=50mA
6
7
1
2
3
4
5
6
7
Input Voltage VIN[V]
Input Voltage VIN[V] R11x2N401B 4.500
R11x2N301B 3.100 3.000 Output Voltage VOUT[V] 2.900 2.800 2.700
Iout=1mA
Output Voltage VOUT[V]
4.000
3.500
3.000
Iout=1mA Iout=30mA Iout=50mA
2.600 2.500 2 3 4 5
Iout=30mA Iout=50mA
2.500 6 7 2 3 4 5 6 7 Input Voltage VIN[V]
Input Voltage VIN[V]
R11x2N501B 5.500 5.000 4.500 4.000 3.500
Iout=1mA
Output Voltage VOUT[V]
3.000 2.500 2 3 4 5
Iout=30mA Iout=50mA
6
7
Input Voltage VIN[V]
Rev. 1.10
- 11 -
3) Dropout Voltage vs. Output Current
R11x2N151B 0.600 0.500 0.400 0.300 0.200 0.100 0.000 0 50 100 150 Output Current IOUT[mA] R11x2N301B 0.600 0.500 0.400 0.300 0.200 0.100 0.000 0 50 100 150 Output Current IOUT[mA]
R11x2N501B 0.600 Dropout Voltage VDIF[V] 0.500
R11x2N201B 0.600
Dropout Voltage VDIF [V]
Topt=25C Topt=85C
Dropout Voltage VDIF [V]
Topt=-40C
0.500 0.400 0.300 0.200 0.100 0.000 0
Topt=-40C Topt=25C Topt=85C
50 100 Output Current IOUT[mA]
150
R11x2N401B 0.600
Dropout Voltage VDIF[V]
Topt=25C Topt=85C
Dropout Voltage VDIF[V]
Topt=-40C
0.500 0.400 0.300 0.200 0.100 0.000 0
Topt=-40C Topt=25C Topt=85C
50 100 Output Current IOUT[mA]
150
Topt=-40C
0.400 0.300 0.200 0.100 0.000 0 50 100 150 Output Current IOUT[mA]
Topt=25C Topt=85C
Rev. 1.10
- 12 -
4) Output Voltage vs. Temperature
VIN=2.5V CIN=1mF VIN=3.0V CIN=1mF
R11x2N151A/B COUT=2.2mFIOUT=30mA
1.53 1.52 1.51 1.50 1.49 1.48 1.47 -50 -25 2.10 2.08 2.06 2.04 2.02 2.00 1.98 1.96 1.94 1.92 1.90 -50 -25
R11x2N201B Output Voltage VOUT[V]
COUT=2.2mF
IOUT=30mA
Output Voltage VOUT(V)
Temperature Topt(C)
R11x2N301A/B
0
25
50
75
100
0
25
50
75
100
Temperature Topt (C)
R11x2N401A/B
4.08
VIN=5.0V CIN=1mF COUT=2.2mF
VIN=4.0V CIN=1mF COUT=2.2mF
3.06
IOUT=30mA
Output Voltage VOUT(V)
IOUT=30mA
Output Voltage VOUT(V)
3.04 3.02 3.00 2.98 2.96 2.94 -50 -25 0 25 50 75 100
4.06 4.04 4.02 4.00 3.98 3.96 3.94 3.92 -50 -25 0 25 50 75 100
Temperature Topt (C)
Temperature Topt (C)
R11x2N501A/B
5.10 5.08
VIN=6.0V CIN=1mF COUT=2.2mF
IOUT=30mA
Output Voltage VOUT(V)
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
- 13 -
5)
Supply Current vs. Input Voltage
R11x2N151B 120 100 Supply Current ISS{uA] 80 60 40 20 0 1 2 3 4 5 6 7 Input Voltage VIN[V] R11x2N301B R11x2N201B
120 100 Supply Current ISS{uA] 80 60 40 20 0 1 2 3 4 5 Input Voltage VIN[V] 6 7
R11x2N401B
120 100 Supply Current ISS{uA]
Supply Current ISS{uA]
120 100 80 60 40 20 0
80 60 40 20 0 1 2 3 4 5 Input Voltage VIN[V]
R11x2N501B
6
7
1
2
3
4
5
6
7
Input Voltage VIN[V]
120 100 Supply Current ISS{uA] 80 60 40 20 0 1 2 3 4 5 Input Voltage VIN[V] 6 7
Rev. 1.10
- 14 -
6)
Supply Current vs. Temperature
R11x2N151A/B
200
VIN=2.5V CIN=1mF COUT=2.2mF
R11x2N201A/B
200
VIN=3.0V CIN=1mF COUT=2.2mF
Supply Current Iss(uA)
150
Supply Current Iss(uA)
-50 -25 0 25 50 75 Temperature Topt (C) 100
150 100 50 0 -50 -25 0 25 50 75 100
100
50
0
Temperature Topt(C)
VIN=5.0V CIN=1mF
VIN=4.0V CIN=1mF
R11x2N301A/B
200
COUT=2.2mF
R11x2N401A/B
200
COUT=2.2mF
Supply Current Iss(uA)
Supply Current Iss(uA)
-50 -25 0 25 50 75 100
150
150
100
100
50
50
0
0 -50 -25 0 25 50 75 100
Temperature Topt(C)
VIN=6.0V CIN=1mF
Temperature Topt (C)
R11x2N501A/B 200
COUT=2.2mF
Supply Current Iss(uA)
150
100
50
0 -50 -25 0 25 50 75 100
(C) Temperature Topt
Rev. 1.10
- 15 -
7)
Ripple Rejection vs. Frequency
R11x2N151A/B 90.00
VIN=2.5V+0.5Vp-p COUT=2.2mF
IOUT=30mA
Ripple Rejection RR [dB]
R11x2N201A/B
VIN=3.0V+0.5Vp-p COUT=2.2mF
90.00 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.1
IOUT=30mA
Ripple Rejection RR [dB]
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]
VIN=4.0V+0.5Vp-p
100
1 10 Frequency Freq [kHz]
R11x2N401A/B
100
VIN=5.0V+0.5Vp-p COUT=2.2mF
R11x2N301A/BCOUT=2.2mF IOUT=30mA
90.00
90.00 80.00 Ripple Rejection RR [dB] 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00
IOUT=30mA
Ripple Rejection RR [dB]
80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.1 1 10
VIN=6.0V+0.5Vp-p
100
0.1
Frequency Freq [kHz]
R11x2N501A/B COUT=2.2mF IOUT=30mA
90.00 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.1 1 10 100
1 10 Frequency Freq [kHz]
100
Ripple Rejection RR [dB]
Frequency Freq [kHz]
Rev. 1.10
- 16 -
8) Ripple Rejection vs. Input Voltage (DC bias)
R11x2N301B 90.00 80.00 Ripple Rejection RR[dB 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 3.10 3.20 3.30 Input Voltage VIN[V]
COUT =Ceramic 2.2mF
R11x2N301B
f=400Hz f=1kHz f=10kHz
COUT =Ceramic 2.2mF
IOUT=1mA
R11x2N301B
COUT =Ceramic 2.2mF
90.00 80.00 Ripple Rejection RR[dB] 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00
3.50
IOUT=10mA
f=400Hz f=1kHz f=10kHz
3.40
3.10
3.20
3.30 3.40 Input Voltage VIN[V]
3.50
90.00 80.00 Ripple Rejection RR[dB] 70.00 60.00 50.00 40.00 30.00
IOUT=50mA
f=400Hz f=1kHz f=10kHz
20.00 10.00 0.00 3.10 3.20 3.30 Input Voltage VIN[V] 3.40
3.50
9) Input Transient Response R11X2N151B Topt=25C
VIN
VOUT
VIN=2.5V<-->3.5V IOUT=30mA CIN =none COUT=2.2mF tr/tf=5ms
Rev. 1.10
- 17 -
R11X2N201B
Topt=25C
VIN
VOUT
VIN=3.0V<-->4.0V IOUT=30mA CIN =none COUT=2.2mF tr/tf=5ms
R11X2N301B
Topt=25C
VIN
VOUT
VIN=4.0V<-->5.0V IOUT=30mA CIN =none COUT=2.2mF tr/tf=5ms
R11X2N401B
Topt=25C
VIN
VOUT
VIN=5.0V<-->6.0V IOUT=30mA CIN =none COUT=2.2mF tr/tf=5ms
Rev. 1.10
- 18 -
R11X2N501B
Topt=25C
VIN
VOUT
VIN=6.0V<-->7.0V IOUT=30mA CIN =none COUT=2.2mF tr/tf=5ms
10) Load Transient Response R11X2N151B Topt=25C
IOUT
VOUT
IOUT=50mA<-->100mA VIN=2.5V CIN=2.2mF COUT=2.2mF tr/tf=5 s
R11X2N201B
Topt=25C
IOUT
VOUT
IOUT=50mA<-->100mA VIN=3.0V CIN=2.2mF COUT=2.2mF tr/tf=5ms
Rev. 1.10
- 19 -
R11X2N301B
Topt=25C
IOUT
VOUT
IOUT=50mA<-->100mA VIN=4.0V CIN=2.2mF COUT=2.2mF tr/tf=5ms
R11X2N401B
Topt=25C
IOUT
VOUT
IOUT=50mA<-->100mA VIN=5.0V CIN=2.2mF COUT=2.2mF tr/tf=5ms
R11X2N501B
Topt=25C
IOUT
VOUT
IOUT=50mA<-->100mA VIN=6.0V CIN=2.2mF COUT=2.2mF tr/tf=5ms
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
1
R1122NXX1B
Ceramic Cap.
Ceramic Cap. ESR IOUT
Spectrum Analyzer
3
S.A.
VDD
2
GND
VIN
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
COUT=2.2uF,CIN=2.2uF 100 100
R11X2N151B
COUT=4.7uF,CIN=2.2uF
10
10
ESR[Ohm]
ESR[Ohm]
1
1
0.1
0.1
0.01 0 30 60 90 120 150
0.01 0 30 60 90 120 150
IOUT[mA]
IOUT[mA]
R11X2N301B
COUT=2.2uF,CIN=2.2uF
100 100
R11X2N301B
COUT=4.7uF,CIN=2.2uF
10
10
ESR[Ohm]
ESR[Ohm]
1
1
0.1
0.1
0.01 0 30 60 90 120 150
0.01 0 30 60 90 120 150
IOUT[mA]
IOUT[mA]
Rev. 1.10
- 22 -

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