'99.7.22
LOW NOISE 150mA LDO REGULATOR
R1111N SERIES
s OUTLINE
The R1111N 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 R1111N 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.
s FEATURES
Ultra-Low Supply Current.........................................TYP. 35µA Standby Mode ...........................................................TYP. 0.1µA Low Dropout Voltage ................................................TYP. 0.2V(IOUT=100mA) High Ripple Rejection ...............................................TYP. 70dB(f=1kHz) Low Temperature-Drift Coefficient of Output Voltage...........................................................TYP. ±100ppm/°C Excellent Line Regulation .........................................TYP. 0.05%/V High Output Voltage Accuracy..................................±2.0% Excellent Line Transient Response and Load Transient Response 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: “L” active , B: “H” active) Pinout ........................................................................Similar to the LP2980
s APPLICATIONS
Power source for cellular phones such as GSM,CDMA and various kind of PCSs. Power source for electrical appliances such as cameras, VCRs and camcorders. Power source for battery-powered equipment.
s BLOCK DIAGRAM
R1111NXX1A R1111NXX1B
1 VDD
5 VOUT
1 VDD
5 VOUT
Vref CE 3 Current Limit GND 2 CE 3
Vref Current Limit GND 2
Rev.1.11
-1-
s 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 : R1111XXX1X-XX ↑↑↑↑ abcd Code a b c d ←Part Number
Contents Designation of Package Type : N:SOT-23-5 (Mini-mold) 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 :“L” active type B :“H” active type Designation of Taping Type : Ex. TR, TL (refer to Taping Specifications ;TR type is the standard direction.)
s PIN CONFIGURATION
SOT-23-5
5 4
VOUT (mark side) VDD GND
NC
CE
1
2
3
s PIN DESCRIPTION
Pin No. 1 2 3 4 5 VDD GND CE or CE NC VOUT Symbol Input Pin Ground Pin Chip Enable Pin No Connection Output pin Description
Rev.1.11
-2-
s ABSOLUTE MAXIMUM RATINGS
Item Input Voltage Input Voltage( CE or CE Pin) Output Voltage Power Dissipation Operating Temperature Range Storage Temperature Range Symbol VIN VCE VOUT PD Topt Tstg Rating 9 -0.3 ~ VIN+0.3 -0.3 ~ VIN+0.3 250 -40 ~ 85 -55 ~ 125 Unit V V V mW °C °C
s ELECTRICAL CHARACTERISTICS
q R1111NXX1A Symbol VOUT IOUT ∆VOUT/∆IOUT VDIF ISS Istandby ∆VOUT/∆VIN RR VIN ∆VOUT/∆T Ilim RPU 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-up Resistance CE Input Voltage “H” CE Input Voltage “L” Output Noise Topt=25°C Conditions MIN. TYP. MAX. Unit VIN = Set VOUT+1V VOUT VOUT V 1mA ≤ IOUT ≤ 30mA ×0.98 ×1.02 Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE VIN = Set VOUT+1V 12 40 mV 1mA ≤ IOUT ≤ 80mA Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE VIN = Set VOUT+1V 35 70 µA VIN = VCE = Set VOUT+1V 0.1 1.0 µA Set VOUT+0.5V ≤ VIN ≤ 8V 0.05 0.20 %/V IOUT = 30mA f = 1KHz, Ripple 0.5Vp-p 70 dB VIN = Set VOUT+1V 8 V IOUT = 30mA ppm ±100 -40°C ≤ Topt ≤ 85°C /°C VOUT = 0V 50 mA 2.5 5 10 MΩ 1.5 VIN V 0 0.25 V 30 BW = 10Hz ∼ 100kHz µVrms
Rev.1.11
-3-
q
R1111NXX1B Symbol VOUT IOUT ∆VOUT/∆IOUT VDIF ISS Istandby ∆VOUT/∆VIN RR VIN ∆VOUT/∆T 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
Topt=25°C Conditions MIN. TYP. MAX. Unit VIN = Set VOUT+1V VOUT VOUT V 1mA ≤ IOUT ≤ 30mA ×0.98 ×1.02 Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE VIN = Set VOUT+1V 12 40 mV 1mA ≤ IOUT ≤ 80mA Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE VIN = Set VOUT+1V 35 70 µA VIN = Set VOUT+1V 0.1 1.0 µA VCE=GND Set VOUT+0.5V ≤ VIN ≤ 8V 0.05 0.20 %/V IOUT = 30mA f = 1KHz, Ripple 0.5Vp-p 70 dB VIN = Set VOUT+1V 8 V ppm IOUT = 30mA ±100 /°C -40°C ≤ Top t ≤ 85°C VOUT = 0V 50 mA 2.5 5 10 MΩ 1.5 VIN V 0 0.25 V 30 BW = 10Hz ∼ 100kHz µVrms Topt = 25°C Output Current IOUT (mA) Condition MIN. 100 VIN - VOUT = 1.0V 150 Topt = 25°C
q
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Output Voltage 1.5 ≤ VOUT ≤ 1.7 1.8 ≤ VOUT ≤ 5.0
Output Voltage VOUT (V) 1.5 1.6 1.7 1.8 ≤ VOUT ≤ 1.9 2.0 ≤ VOUT ≤ 2.4 2.5 ≤ VOUT ≤ 2.7 2.8 ≤ VOUT ≤ 3.3 3.4 ≤ VOUT ≤ 5.0
Dropout Voltage VDIF (V) Condition MIN. TYP. 0.5 0.4 0.3 0.60 IOUT = 100mA 0.35 0.24 0.20 0.17
MAX.
1.40 0.70 0.35 0.30 0.26
Rev.1.11
-4-
s OPERATION
R1111NXX1A R1111NXX1B
1 VDD
5 VOUT
1 VDD
5 VOUT
R1 Vref CE 3 Current Limit R2 GND CE 3 Vref Current Limit
R1
R2
GND
2
2
In these ICs, fluctuation of Output Voltage, VOUT is detected by Feed-back Registers R1, 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.1.11
-5-
s TEST CIRCUITS
CE 3 3 CE
IN
VDD 1
VOUT R1111Nxx1B Series 5
OUT IOUT 2.2µF
IN ISS
VDD 1
VOUT R1111Nxx1B Series 5
OUT
2 0.1µF GND
2 0.1µF GND
2.2µF
Fig.1 Standard test Circuit
CE 3
Fig.2 Supply Current Test Circuit
CE 3
IN
VDD 1
VOUT R1111Nxx1B Series 5
OUT IOUT
IN
VDD 1
VOUT R1111Nxx1B Series 5
OUT
P.G
2 GND 1µF
2 GND I1 I2
Fig.3 Ripple Rejection, Line Transient Response Test Circuit
Fig.4 Load Transient Response Test Circuit
Rev.1.11
-6-
s TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current R1111N181B
Topt = 25°C 2.0 1.8
R1111N301B
Topt = 25°C 3.5 3.0 5.0V 4.0V 2.5 2.0 1.5 1.0 0.5 VIN = 3.3V 3.5V
Output Voltage VOUT (V)
1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0 100 200 300 400 Output Current IOUT (mA) 500 VIN = 2.1V 2.3V
Output Voltage VOUT (V)
1.6
3.8V
2.8V
0.0 0 100 200 300 400 Output Current IOUT (mA) 500
R1111N401B
Topt = 25°C 5.0 4.5 6.0 5.0
R1111N501B
Topt = 25°C
Output Voltage VOUT (V)
4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 100 200 300 400 Output Current IOUT (mA) 500 VIN = 4.3V
7.0V 6.0V 5.5V
Output Voltage (V)
6.0V 5.0V 4.5V
4.0 3.0 2.0
VIN = 5.3V 1.0 0.0 0 100 200 300 400 Output Current IOUT (mA) 500
2)
Output Voltage vs. Input Voltage R1111N181B
Topt = 25°C 2.0 1.9
Output Voltage VOUT (V)
R1111N301B
Topt = 25°C 3.1 IOUT=1mA
Output Voltage VOUT (V)
IOUT = 1mA 1.8 1.7 1.6 1.5 1.4 30mA 1.3 50mA 1.2 1.0 2.0 3.0 4.0 5.0 6.0 Input Voltage VIN (V) 7.0 8.0
3.0 2.9 2.8 2.7 30mA 2.6 2.5 2.0 50mA 3.0 4.0 5.0 6.0 Input Voltage VIN (V) 7.0 8.0
Rev.1.11
-7-
R1111N401B
4.5 IOUT = 1mA
Output Voltage VOUT (V)
R1111N501B
Topt = 25°C
Topt = 25°C 5.5 5.0
Output Voltage VOUT (V)
4.0
IOUT = 1mA 4.5 4.0 3.5 30mA 3.0 50mA 2.5 2.0
3.5 30mA 3.0 50mA 2.5 2.0 3.0 4.0 5.0 6.0 Intput Voltage VIN (V) 7.0 8.0
3.0
4.0 5.0 6.0 Intput Voltage VIN (V)
7.0
8.0
3)
Dropout Voltage vs. Output Current R1111N181B
1.20 1.00
Dropout Voltage VDIF (V)
R1111N301B
0.40 0.35 Topt = 85°C 25°C
Topt = 85°C 0.80 0.60 0.40 -40°C 0.20 0.00 0 50 100 Output Current IOUT (mA) 150 25°C
Dropout Voltage VDIF (V)
0.30 0.25 0.20 0.15 0.10 0.05 0.00 0 50 100 Output Current IOUT (mA) 150 -40°C
R1111N401B
0.40 0.35
R1111N501B
0.40 0.35
Dropout Voltage VDIF (V)
Dropout Voltage VDIF (V)
0.30 0.25 0.20 0.15 0.10 0.05 0.00 0 50 100 Output Current IOUT (mA) 150 -40°C Topt = 85°C 25°C
0.30 0.25 0.20 0.15 0.10 0.05 0.00 0
Topt = 85°C 25°C
-40°C
50 100 Output Current IOUT (mA)
150
Rev.1.11
-8-
4)
Output Voltage vs. Temperature R1111N181B
1.90 1.88
Output Voltage VOUT (V)
R1111N301B
VIN = 2.8V IOUT = 30mA
3.10 3.08 VIN = 4.0V IOUT = 30mA
Output Voltage VOUT (V)
1.86 1.84 1.82 1.80 1.78 1.76 1.74 1.72 1.70 -50 -25 0 25 50 Temperature Topt ° 75 100
3.06 3.04 3.02 3.00 2.98 2.96 2.94 2.92 2.90 -50 -25 0 25 50 Temperature Topt ° 75 100
R1111N401B
4.10 4.08
Output Voltage VOUT (V) Output Voltage VOUT (V)
R1111N501B
VIN = 5.0V IOUT = 30mA
5.10 5.08 5.06 5.04 5.02 5.00 4.98 4.96 4.94 4.92 VIN = 6.0V IOUT = 30mA
4.06 4.04 4.02 4.00 3.98 3.96 3.94 3.92 3.90 -50 -25 0 25 50 Temperature Topt ° 75 100
4.90 -50
-25
0 25 50 Temperature Topt °
75
100
5)
Supply Current vs. Input Voltage R1111N181B
Topt = 25°C 60 50
R1111N301B
Topt = 25°C 60 50 Supply Current I ISS µ 40 30 20 10 0 1.0
Supply Current I ISS µ
40 30 20 10 0 1.0
2.0
3.0 4.0 5.0 6.0 Input Voltage VIN (V)
7.0
8.0
2.0
3.0 4.0 5.0 6.0 Input Voltage VIN (V)
7.0
8.0
Rev.1.11
-9-
R1111N401B
60 50 Topt = 25°C
60 50
R1111N501B
Topt = 25°C
Supply Current ISS µ
40 30 20 10 0 1.0
Supply Current ISS µ
2.0 3.0 4.0 5.0 6.0 Intput Voltage VIN (V) 7.0 8.0
40 30 20 10 0 1.0
2.0
3.0 4.0 5.0 6.0 Intput Voltage VIN (V)
7.0
8.0
6)
Supply Current vs. Temperature R1111N181B
VIN = 2.8V 50 45 50 45
R1111N301B
VIN = 4.0V
Supply Current ISS (µA)
40 35 30 25 20 -50
Supply Current ISS (µA)
0 50 Temperature Topt (°C) 100
40 35 30 25 20 -50
0 50 Temperature Topt (°C)
100
R1111N401B
VIN = 5.0V 50 45
50 45
R1111N501B
VIN = 6.0V
Supply Current ISS (µA)
40 35 30 25 20 -50
Supply Current ISS (µA)
0 50 Temperature Topt (°C) 100
40 35 30 25 20 -50
0 50 Temperature Topt (°C)
100
Rev.1.11
- 10 -
7)
Dropout Voltage vs. Set Output Voltage R1111N××1B
Topt = 25 1.0 0.9
Dropout Voltage VDIF (V)
0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 1.0
IOUT = 150mA IOUT = 100mA IOUT = 50mA IOUT = 30mA IOUT = 10mA
2.0 3.0 4.0 Set Output Voltage Vreg (V)
5.0
8)
Ripple Rejection vs. Frequency R1111N181B
VIN = 2.8VDC + 0.5Vp-p COUT = tantal 1.0µF 80 70
80 70 Ripple Rejection RR (dB) 60 50 40 30 20 10 0 0.1
R1111N181B
VIN = 2.8VDC + 0.5Vp-p COUT = tantal 2.2µF
Ripple Rejection RR (dB)
60 50 40 30 20 10 0 0.1 1 10 Frequuency f (kHz) 100 IOUT = 50mA IOUT = 1mA IOUT = 30mA
IOUT= 1mA IOUT = 30mA IOUT = 50mA
1
10
100
Frequuency f (kHz)
R1121N301B
VIN = 4VDC + 0.5Vp-p COUT = tantal 1.0µF 80
80 70 Ripple Rejection RR (dB) 60 50 40 30 20 10 0 0.1
R1121N301B
VIN = 4VDC + 0.5Vp-p COUT = tantal 2.2µF
70
Ripple Rejection RR (dB)
60 50 40 30 20 10 0 0.1 1 10 Frequuency f (kHz) 100 IOUT = 50mA IOUT = 1mA IOUT = 30mA
IOUT = 1mA IOUT = 30mA IOUT = 50mA
1
10
100
Frequuency f (kHz)
Rev.1.11
- 11 -
R1111N401B
VIN = 5.0VDC + 0.5Vp-p COUT = tantal 1.0µF 80
R1111N401B
VIN = 5.0VDC + 0.5Vp-p COUT = tantal 2.2µF 80 70
Ripple Rejection RR (dB)
Ripple Rejection RR (dB)
70 60 50 40 30 20 10 0 0.1 1 10 Frequeney f (kHz) 100 IOUT = 50mA IOUT= 1mA IOUT = 30mA
60 50 40 30 20 10 0 0.1 1 10 100 Frequeney f (kHz) IOUT = 50mA IOUT = 1mA IOUT = 30mA
9)
Ripple Rejection vs. Input Voltage (DC bias) R1111N301B
IOUT = 1mA COUT = 2.2µF 80 70
R1111N301B
IOUT = 10mA COUT = 2.2µF 80 70
Ripple Rejection RR(dB)
Ripple Rejection RR (dB)
60 50 40 30 20 10 0 3.1 3.2 3.3 3.4 Input Voltage VIN (V) 3.5 f = 1kHz f = 10kHz f = 400Hz
60 50 40 30 20 10 0 3.1 3.2 3.3 3.4 Input Voltage VIN (V) 3.5 f = 1kHz f = 10kHz f = 400Hz
R1111N301B
IOUT = 50mA COUT = 2.2µF 80 70 f = 400Hz f = 1kHz f = 10kHz
Ripple Rejection RR(dB)
60 50 40 30 20 10 0 3.1
3.2
3.3
3.4
3.5
Input Voltage VIN (V)
Rev.1.11
- 12 -
10) Line Transient Response R1111N301B
IOUT=30mA tr=tf=5 µs COUT=Tantalum 1.0µF 3.4 6
Output Voltage VOUT (V)
Input Voltage 3.2 3.1 Output Voltage 3.0 2.9 2.8 0 20 40 60 Time t (µs) 80 100 120 2 1 0 4 3
R1111N301B
IOUT=30mA tr=tf=5 µs COUT=Tantalum 2.2µF 3.4 6
Output Voltage VOUT (V)
Input Voltage 3.2 3.1 Output Voltage 3.0 2.9 2.8 0 20 40 60 Time t (µs) 80 100 120 2 1 0 4 3
R1111N301B
IOUT=30mA tr=tf=5 µs COUT=Tantalum 4.7µF 3.4 6
Output Voltage VOUT (V)
Input Voltage 3.2 3.1 3.0 2.9 2.8 0 20 40 60 Time t (µs) 80 100 120 Output Voltage 2 1 0 4 3
Rev.1.11
- 13 -
Input Voltage VIN (V)
3.3
5
Input Voltage VIN (V)
3.3
5
Input Voltage VIN (V)
3.3
5
11) Load Transient Response R1111N301B
VIN=4V CIN=Tantalum 1µF COUT=Tantalum 1.0µF 3.4 150 100 Output Current 3.2 3.1 Output Voltage 3.0 2.9 2.8 0 2 4 6 8 10 12 Time t (µs) 14 16 18 20 -50 -100 -150 50 0
Output Voltage VOUT (V)
3.3
R1111N301B
VIN=4V CIN=Tantalum 1µF COUT=Tantalum 2.2µF 3.4 150 100 Output Current 3.2 3.1 Output Voltage 3.0 2.9 2.8 0 2 4 6 8 10 12 Time t (µs) 14 16 18 20 -50 -100 -150 50 0
Output Voltage VOUT (V)
3.3
R1111N301B
VIN=4V CIN=Tantalum 1µF COUT=Tantalum 4.7µF 3.4 150 100 Output Current 3.2 3.1 3.0 2.9 2.8 0 2 4 6 8 10 12 Time t (µs) 14 16 18 20 50 0 -50 -100 -150
Output Voltage VOUT (V)
3.3
Output Voltage
Rev.1.11
- 14 -
Output Current IOUT (mA)
Output Current IOUT (mA)
Output Current IOUT (mA)
s TECHNICAL NOTES
When using these ICs, consider the following points: 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:
3 CE VOUT 5
Ceramic Capacitor Spectrum Analyzer
R1111N301B 1 VIN
Ceramic Capacitor 1µF
VIN
2
GND
ESR IOUT
S.A.
Measuring Circuit for white noise;R1111N301B The relations between IOUT (Output Current) and ESR of Output Capacitor are shown below. The conditions when the white noise level is under 40µV(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=4V (2) Frequency band :10Hz to 1MHz (3) Temperature : 25°C R1111N301B
Ceramic 1.0µF 100.0
100.0
R1111N301B
Ceramic 2.2µF
ESR (Ω)
10.0 ESR (Ω) 1.0
10.0
1.0
0.1 0 50 100 150 Output Current IOUT (mA)
0.1 0 50 100 Output Current IOUT (mA) 150
Make VDD and GND line sufficient. When the impedance of these is high, the noise might be picked up or not work correctly. Connect the capacitor with a capacitance of 1µF or more between VDD and GND as close as possible. Set external components, especially Output Capacitor, as close as possible to the ICs and make wiring shortest.
Rev.1.11
- 15 -
s TYPICAL APPLICATION
CE CE
IN
VDD
R1111NXX1A VOUT
OUT
IN
VDD
R1111Nxx1B VOUT
OUT
Cap.
GND
Cap.
Cap.
GND
Cap.
Rev.1.11
- 16 -
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