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NJM2871B/72B
Low Dropout Voltage Regulator
GENERAL DESCRIPTION The NJM2871B/72B are low dropout voltage regulator designed for cellular phone applications. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. FEATURES High Ripple Rejection 75dB typ. (f=1kHz Vo=3V version) Output Noise Voltage Vno=30Vrms typ. (Cp=0.01F) Output capacitor with 1.0uF ceramic capacitor(Vo2.7V: Version) Output Current Io(max.)=150mA High Precision Output Vo 1.0% Low Dropout Voltage 0.10V typ. (Io=60mA) Input Voltage Range +2.3 +14V(Vo2.0V version) ON/OFF Control (Active High) Internal Short Circuit Current Limit Internal Thermal Overload Protection Bipolar Technology Package Outline SOT-23-5 (MTP5) PIN CONFIGURATION
5 4
PACKAGE OUTLINE
NJM2871BF/72BF
123
1. CONTROL (Active High) 2. GND 3. NOISE BYPASS 4. VOUT 5. VIN
5
4
123
1. VIN 2. GND 3. CONTROL (Active High) 4. NOISE BYPASS 5. VOUT
NJM2871BF EQUIVALENT CIRCUIT
VIN Control Bandgap Reference
NJM2872BF
V OUT Thermal Protection Noise Bypass
GND
Ver.2005-01-25
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NJM2871B/72B
OUTPUT VOLTAGE RANK LIST Device Name VOUT Device Name NJM287*BF15 1.5V NJM287*BF26 NJM287*BF18 1.8V NJM287*BF27 NJM287*BF19 1.9V NJM287*BF28 NJM287*BF02 2.0V NJM287*BF29 NJM287*BF21 2.1V NJM287*BF03 NJM287*BF23 2.3V NJM287*BF31 NJM287*BF25 2.5V NJM287*BF32 ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT VOUT 2.6V 2.7V 2.8V 2.9V 3.0V 3.1V 3.2V Device Name NJM287*BF33 NJM287*BF34 NJM287*BF35 NJM287*BF38 NJM287*BF04 NJM287*BF48 NJM287*BF05 VOUT 3.3V 3.4V 3.5V 3.8V 4.0V 4.8V 5.0V
(Ta=25C) RATINGS UNIT +14 V +14(*1) V 350(*2) Power Dissipation PD SOT-23-5 mW 200(*3) Operating Temperature Topr -40 +85 C Storage Temperature Tstg -40 +125 C (*1) : When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage. (*2) : Mounted on glass epoxy board based on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers) (*3) : Device itself Operating voltage VIN=+2.3 +14V (In case of Vo<2.1V version) ELECTRICAL CHARACTERISTICS (VIN=Vo+1V, CIN=0.1F, Co=1.0F: Vo2.7V (Co=2.2F : 1.8VPARAMETER Output Voltage Quiescent Current Quiescent Current at Control OFF Output Current Line Regulation Load Regulation Dropout Voltage (*4) Ripple Rejection Average Temperature Coefficient of Output Voltage Output Noise Voltage Control Voltage for ON-state Control Voltage for OFF-state SYMBOL Vo IQ IQ(OFF) Io Vo/VIN Vo/Io VI-O RR Vo/Ta VNO1 VCONT(ON) VCONT(OFF) Io=30mA Io=0mA, except Icont VCONT=0V Vo-0.3V VIN=Vo+1V Vo+6V, Io=30mA Io=0 100mA Io=60mA ein=200mVrms, f=1kHz, Io=10mA, Vo=3V version Ta=0 +85C, Io=10mA f=10Hz80kHz, Io=10mA, Vo=3V Version TEST CONDITION MIN. -1.0% - - 150 - - - - - - 1.6 - TYP. - 120 - 200 - - 0.10 75 50 30 - - MAX. +1.0% 180 100 - 0.10 0.03 0.18 - - - - 0.6 UNIT V A nA mA %/V %/mA V dB ppm/C Vrms V V
(*4): The output voltage excludes under 2.1V. The above specification is a common specification for all output voltages. Therefore, it may be different from the individual specification for a specific output voltage.
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Ver.2005-01-25
NJM2871B/72B
TEST CIRCUIT
IIN VIN VOUT IOUT
A
VIN
0.1F
NJM287*B
1.0F
*5
V
VOUT
A V
VCONT
ICONT CONTROL GND
NOISE BYPASS Cp=0.01F
*5
1.8VTYPICAL APPLICATION 1 In the case where ON/OFF Control is not required:
VIN
VIN 0.1F
VOUT
VOUT
NJM287*B
1.0F
*6
R (0300k) CONTROL GND NOISE BYPASS Cp=0.01F
*6
1.8VConnect control terminal to VIN terminal The quiescent current can be reduced by using a resistance "R". Instead, it increases the minimum operating voltage. For further information, please refer to Figure "Output Voltage vs. Control Voltage".
Ver.2005-01-25
-3-
NJM2871B/72B
2 In use of ON/OFF CONTROL:
VIN
VIN
VOUT
VOUT
0.1F R
NJM287*B
1.0F
*6
CONTROL GND
NOISE BYPASS Cp=0.01F
*6
1.8VState of control terminal: *"H" output is enabled. *"L" or "open" output is disabled. Noise bypass Capacitance Cp Noise bypass capacitance Cp reduces noise generated by band-gap reference circuit. Noise level and ripple rejection will be improved when larger Cp is used. Use of smaller Cp value may cause oscillation. Use the Cp value of 0.01uF greater to avoid the problem. POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJM2871B/72BF Power Dissipation (Topr=-40+85,Tj=125,PD =200mW(Ta25))
500
Power Dissipation PD(mW)
400
On Board(114.3x76.2x1.6mm, FR-4)
300 Device itself 200
100
0 -50 -25 0 25 50 75 100
Ambient Temperature Ta()
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Ver.2005-01-25
NJM2871B/72B
ELECTRICAL CHARACTERISTICS
NJM2871B_3V Output Voltage v.s. Input Voltage
3.2 @:Ta=25 C Co=1.0uF(Ceramic) Cp=0.01uF 3.1
o
NJM2871B_3V Output Voltage vs. Output Current
4
3.5
Output Voltage :Vo [V]
3
Io=0A 3
Output Voltage :Vo [V]
2.5
2
2.9 Io=30mA 2.8 Io=100mA 2.7 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
1.5
1
0.5
@:Ta=25 C VIN=4V Co=1.0uF(Ceramic) Cp=0.01uF
o
0 0 50 100 150 200 250 300
Input Voltage :Vin [V]
Output Current :Io [mA]
NJM2871B_3V Ground Pin Current vs. Output Voltage
20 @:Ta=25 C VIN=4V Co=1.0uF(Ceramic) Cp=0.01uF
o
NJM2871B_3.0V Dropout Voltage vs. Output Current
0.3 @:Ta=25 C Co=1.0uF(Ceramic) Cp=0.01uF 0.25
o
Ground Pin Current :Ignd [mA]
15
Dropout Voltage :dVi-o [V]
0 50 100 150 200
0.2
10
0.15
0.1
5
0.05
0
0 0 50 100 150 200
Output Current :Io [mA]
Output Current :Io [mA]
NJM2871B_3.0V Control Current v.s. Control Voltage
30 @:Ta=25 C Vin=4.0V Co=1.0uF(Ceramic) Cp=0.01uF Io=30mA
o
NJM2871B_3.0V Output Voltage v.s. Control Voltage
4 @:Ta=25 C Vin=4.0V Co=1.0uF(Ceramic) Cp=0.01uF Io=30mA Rc=0 2.5 Rc=50k 2 Rc=100k 1.5
o
3.5
25
Control Current :Icont [uA]
20
15 Rc=0 Rc=50k 10
Output Voltage :Vo [V]
3
1 5 0.5 Rc=100k 0 0 0.5 1 1.5 2 2.5 3 3.5 4 0 0 0.5 1 1.5 2 2.5 3
Control Voltage :Vcont [V]
Control Voltage :Vcont [V]
Ver.2005-01-25
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NJM2871B/72B
ELECTRICAL CHARACTERISTICS
NJM2871B_3V Load Regulation vs. Output Current
0 300
NJM2871B_3V Peak Output Current vs. Input Voltage
250 -10
Peak Output Current :Io MAX [mA]
Load Regulation :dVo/dIo [mV]
200
-20
150
-30
100
-40
@:Ta=25 C VIN=4V Co=1.0uF(Ceramic) Cp=0.01uF 0 50 100 150 200
o
50
@:Ta=25 C Co=1.0uF(Ceramic) Cp=0.01uF
o
-50
0 4 6 8 10 12 14
Output Current :Io [mA]
Input Voltage :Vin [V]
NJM2871B_3.0V Quiescent Current v.s. Input Voltage
2000 @:Ta=25 C Output is open. Co=1.0uF(Ceramic) Cp=0.01uF including Icont
o
300
NJM2871B_3.0V Output Noise Voltage vs. Noise Bypass Capacitor
@:Ta=25 C VIN=4V Co=1uF(Ceramic) Io=10mA
o
Output Noise Voltage : Vn(uVrms)
1600
250
Quiescent Current : Iq [uA]
200
1200
150
800
100
400
50
0 0 5 10 15
0 -12 1p 10
-11 10p 10
-10 100p 10
-9 1000p 10
-8 0.01u 10
-7 0.1u 10
Input Voltage :Vin [V]
Noise Bypass Capacitor : Cp(F)
100
NJM2871B_3.0V Output Noise Voltage vs. Output Current
@:Ta=25 C VIN=4V Cp=0.01uF LPF:80kHz
o
NJM2871B_3.0V Ripple Rejection Ratio v.s. Frequency
90 Io=0mA 80 Io=10mA
Output Noise Voltage :Vn [uVrms]
80
Ripple Rejection Ratio :RR [dB]
70 Io=30mA 60
60
40
50
Co=1.0uF(Ceramic)
40 @:Ta=25 C VIN=4.0V ein=200mVrms Co=1uF(Ceramic) Cp=0.01uF 1k 1000
4 10k 10 5 100k 10 o
20 Co=2.2uF(Ceramic)
30
0 0.001
20 0.01 0.1 1 10 100 10 10 100
Output Current :Io [mA]
Frequency :f [Hz]
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Ver.2005-01-25
NJM2871B/72B
ELECTRICAL CHARACTERISTICS
NJM2871B_3.0V Ripple Rejection vs. Output Current
100
NJM2871B_3.0V Equivalent Series Resistance vs. Output Current
100 @:Ta=25 C VIN=4V Co=1.0uF(Ceramic) Cp=0.01uF 10
o
f=1kHz 80
70 f=10kHz
Equivalent Series Resistance :ESR [ohm]
90
Ripple Rejection : RR (dB)
60
STABLE REGION
1
50
40 @:Ta=25 C VIN=4.0V ein=200mVrms Co=1.0uF(Ceramic) 0.01 0.1 1 10 100
o
0.1
30
20 0.001
0.02 0.001 0.01 0.1 1 10 100
Output Current : Io(mA)
Output Current :Io [mA]
NJM2871B_3.0V Dropout Voltage v.s. Temperature
0.3 @:Io=60mA Co=1.0uF(Ceramic) Cp=0.01uF 0.25 2
NJM2871B_3.0V Control Voltage v.s. Temperature
@:VIN=4.0V Output is open. Co=1.0uF(Ceramic) Cp=0.01uF
0.2
Control Voltage :Vcont-off [V]
1.5
Dropout Voltage :dVi-o [V]
0.15
1
0.1
0.5
0.05
0 -50 0 50 100
o
0 150 -50 0 50 100
o
150
Temperature :Ta [ C]
Temperature :Ta [ C]
NJM2871B_3.0V Output Voltage v.s. Temperature
3.1 @:VIN=4.0V Io=30mA Co=1.0uF(Ceramic) Cp=0.01uF 3.05 300
NJM2871B_3.0V Quiescent Current v.s. Temperature
@:VIN=4.0V Output is open. Co=1.0uF(Ceramic) Cp=0.01uF
250
Quiescent Current : Iq [uA]
-50 0 50 100
o
Output Voltage :Vo [V]
200
3
150
100
2.95
50
2.9 150
0 -50 0 50 100
o
150
Temperature :Ta [ C]
Temperature :Ta [ C]
Ver.2005-01-25
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NJM2871B/72B
ELECTRICAL CHARACTERISTICS
NJM2871B_3.0V Line Regulation v.s. Temperature
0.2 @:VIN=4.0-9.0V Io=30mA Co=1.0uF(Ceramic) Cp=0.01uF 0.1 0.03 @:VIN=4.0V Io=0-100mA Co=1.0uF(Ceramic) Cp=0.01uF
NJM2871B_3.0V Load Regulation v.s. Temperature
0.025
Load Regulation :dVo/dIo [%/mA]
-50 0 50 100
o
Line Regulation :dVo/dVin [%/V]
0.02
0
0.015
0.01
-0.1
0.005
-0.2 150
0 -50 0 50 100
o
150
Temperature :Ta [ C]
Temperature :Ta [ C]
NJM2871B_3.0V Output Voltage v.s. Temperature
3.5 200
NJM2871B_3.0V Short Circuit Current v.s. Temperature
@:VIN=4.0V Output is short to ground. Co=1.0uF(Ceramic) Cp=0.01uF
3
2.5
2
Short Circuit Current :Isc [mA]
50 100
o
150
Output Voltage :Vo [V]
100
1.5
1 @:VIN=4.0V Io=30mA Co=1.0uF(Ceramic) Cp=0.01uF
50
0.5
0 -50 0 150 200
0 -50 0 50 100
o
150
Temperature :Ta [ C]
Temperature :Ta [ C]
NJM2871B_3.0V ON/OFF Transient Response without Load
7 6 Control Voltage 5 Output Voltage : Vo [V] 4 Output Voltage 3 2 1 0 -1 0 1 2 3 Time : t [S] 4 5 -5 -10 -15 -20 -25 @:Ta=25 C VDD=4.0V Co=1.0uF(Ceramic) Cp=0.01uF Io=0mA
o
NJM2871B_3.0V ON/OFF Transient Response
15 10 5 0 7 6 Control Voltage Control Voltage : Vo [V] 5 Output Voltage : Vo [V] 4 Output Voltage 3 2 1 0 -1 0 4 8 12 Time : t [mS] 16 20 -5 -10 -15 -20 -25 @:Ta=25 C VDD=4.0V Co=1.0uF(Ceramic) Cp=0.01uF Io=30mA
o
15 10 5 0
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Ver.2005-01-25
Control Voltage : Vo [V]
NJM2871B/72B
ELECTRICAL CHARACTERISTICS
NJM2871B_3.0V Load Transient Response
3.1 3.08 Output Current 3.06 Output Voltage : Vo [V] 3.04 3.02 Output Voltage 3 2.98 2.96 2.94 0 40 80 120 Time : t [uS] 160 -100 -150 -200 -250 200 @:Ta=25 C VDD=4.0V Co=1.0uF(Ceramic) Cp=0.01uF
o
NJM2871B_3.0V Input Transient Response
150 100 50 0 -50
3.1 3.08
7 6
Output Current : Io [mA]
Output Voltage : Vo [V]
Input Voltage
3.04 3.02 3 Output Voltage 2.98 2.96 2.94 0 40 80 120 Time : t [uS] 160 200 @:Ta=25 C VDD=4.0V Co=1.0uF(Ceramic) Cp=0.01uF Io=30mA
o
4 3 2 1 0 -1
[CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
Ver.2005-01-25
-9-
Input Voltage : VIN [V]
3.06
5

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