NJM2898
2ch ULTRA LOW NOISE LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION The NJM2898 is a 2ch ultra low noise low dropout voltage regulator designed for VCO Applications. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. PACKAGE OUTLINE
NJM2898PB1
FEATURES High Ripple Rejection Output Noise Voltage
75dB typ. (f=1kHz,Vo=3V Version) Vno=19µVrms typ. (Cp=0.01µF, Co=1.0µF(Ceramic)) Vno=12µVrms typ. (Cp=0.1µF, Co=10µF(Tantalum)) Output capacitor with 1.0uF ceramic capacitor Output Current Io(max.)=100mA × 2ch High Precision Output Vo±1.0% Low Dropout Voltage 0.10V typ. (Io=60mA) ON/OFF Control (Active High) Internal Short Circuit Current Limit Internal Thermal Overload Protection Bipolar Technology Package Outline FFP12-B1 (2.0×2.0×0.85mm)
PIN CONFIGURATION
9 8 7 7 8 9 10 11 12
10 11 12 1 2 3
6 5 4
6 5 4 3 2 1
PIN FUNCTION 1. VOUT2 2. VOUT2 3. GND 4. CONTROL2 5. VIN2 6. VIN1
7. CONTROL1 8. VOUT1 9. VOUT1 10. NOISE BYPASS1 11. NC 12. NOISE BYPASS2
TOP TOP
UNDER
NJM2898PB1
EQUIVALENT CIRCUIT
VIN 1/VIN2 Control1/ Control2 Bandgap Reference Thermal Protection Noise Bypass1/ Noise Bypass2 VOUT1/V OUT2
GND
Ver.2004-12-22
-1-
NJM2898
(Ta=25°C) RATINGS UNIT +14 V +14(*1) V 350(*2) mW -40 ∼ +85 °C -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) ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT Power Dissipation PD Operating Temperature Topr Storage Temperature Tstg ELECTRICAL CHARACTERISTICS (1CH/2CH: VIN=Vo+1V, CIN=0.1µF, Co=1.0uF: Vo≥2.7V (Co=2.2uF: Vo≤2.6V), Cp=0.01µF, Ta=25°C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. Output Voltage Vo Io=30mA -1.0% − Quiescent Current IQ Io=0mA, except Icont, per 1ch 120 − Quiescent Current VCONT=0V, per 1ch IQ(OFF) − − at Control OFF Output Current Io 100 130 Vo−0.3V Line Regulation ∆Vo/∆VIN VIN=Vo+1V ∼ Vo+6V, Io=30mA − − Load Regulation ∆Vo/∆Io Io=0 ∼ 100mA − − Io=60mA 0.10 Dropout Voltage ∆VI−O − ein=200mVrms,f=1kHz, Io=10mA, Ripple Rejection RR 75 − Vo=3V Version Average Temperature Coefficient of Output ∆Vo/∆Ta Ta=0 ∼ 85°C, Io=10mA ± 50 − Voltage f=10Hz ∼ 80kHz, Io=10mA, Cp=0.01µF, Output Noise Voltage1 VNO1 19 − Co=1.0µF(Ceramic), Vo=3V Version f=10Hz ∼ 80kHz, Io=10mA, Cp=0.1µF, Output Noise Voltage2 VNO2 12 Co=10µF(Tantalum), Vo=3V Version Control Voltage for 1.6 VCONT(ON) − ON-state Control Voltage for VCONT(OFF) − − OFF-state 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. OUTPUT VOLTAGE RANK LIST Device Name NJM2898PB1-2828 NJM2898PB1-JJ NJM2898PB1-0303 NJM2898PB1-0521 VOUT CH1 2.8V 2.85V 3.0V 5.0V CH2 2.8V 2.85V 3.0V 2.1V
MAX. +1.0% 180 100 0.10 0.03 0.18 − − −
UNIT V µA nA mA %/V %/mA V dB ppm/°C µVrms µVrms
− 0.6
V V
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Ver.2004-12-22
NJM2898
TEST CIRCUIT
A
1.0µF
*note1
I CONT1
V
VOUT1 IOUT1
V
VCONT1 VOUT1 VOUT1 CONTROL1
NOISE BYPASS1 Cp=0.01µF
VIN1 0.1µF
A
IIN1 VIN1
NC
NJM2898
VIN2 0.1µF
A
IIN2 VIN2
NOISE BYPASS2 CONTROL2 Cp=0.01µF VOUT2 VOUT2 GND
A
I CONT2
V
VCONT2
V
VOUT2 IOUT2
1.0µF*3 (ceramic)
*3 Vo≤2.6V version: Co=2.2µF(ceramic)
Ver.2004-12-22
-3-
NJM2898
TYPICAL APPLICATION 1 In the case where ON/OFF Control is not required:
VOUT1 1.0µF*note1
VOUT1
VOUT1
CONTROL1
R (0 ∼ 300kΩ)
NOISE BYPASS1 Cp=0.01µF
VIN1
VIN1
0.1µF
NC
NJM2898
VIN2
VIN2
R NOISE BYPASS2 Cp=0.01µF VOUT2 VOUT2 1.0µF*4 VOUT2 GND (0 ∼ 300kΩ) CONTROL2
0.1µF
*4 Vo≤2.6V version: Co=2.2µF
Connect 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”.
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Ver.2004-12-22
NJM2898
2 In use of ON/OFF CONTROL:
VOUT1 1.0µF*note1 R (0 ∼ 300kΩ) VOUT1 VOUT1 CONTROL1
NOISE BYPASS1 Cp=0.01µF
VIN1 0.1µF
VIN1
NC
NJM2898
VIN2 0.1µF
VIN2
NOISE BYPASS2 CONTROL2 Cp=0.01µF VOUT2 VOUT2
R (0 ∼ 300kΩ)
GND
VOUT2 1.0µF*4
*4 Vo≤2.6V version: Co=2.2µF
State 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.
Ver.2004-12-22
-5-
NJM2898
ELECTRICAL CHARACTERISTICS
NJM2898_3V Output Voltage v.s. Input Voltage
3.2 @:Ta=25oC Co=1.0 µF(Ceramic) Cp=0.01 µF 3.1 4
NJM2898_3.0V Output Voltage vs. Output Current
3.5
Output Voltage :Vo [V]
3 Io=0A 3
Output Voltage :Vo [V]
2.5
2
2.9 Io=30mA
1.5
1 2.8 Io=100mA 2.7 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 0.5
@:Ta=25oC V IN=4V Co=1.0 µF(Ceramic) Cp=0.01 µF
0 0 50 100 150 200
Input Voltage :VIN [V]
Output Current :Io [mA]
NJM2898_3V Ground Pin Current vs. Output Voltage
20 @:Ta=25 C V IN=4V Co=1.0 µF(Ceramic) Cp=0.01 µF
o
NJM2898_3.0V Dropout Voltage vs. Output Current
0.3 @:Ta=25oC Co=1.0 µF(Ceramic) Cp=0.01 µF
0.25
Ground Pin Current :Ignd [mA]
15
Dropout Voltage :dVi-o [V]
0 20 40 60 80 100 120
0.2
10
0.15
0.1
5
0.05
0
0 0 20 40 60 80 100 120
Output Current :Io [mA]
Output Current :Io [mA]
NJM2898_3.0V Control Current v.s. Control Voltage
30 @:Ta=25oC V IN=4.0V Co=1.0 µF(Ceramic) Cp=0.01µF Io=30mA
NJM2898_3.0V Output Voltage v.s. Control Voltage
4 @:Ta=25 oC VIN=4.0V Co=1.0 µF(Ceramic) Cp=0.01µF Io=30mA Rc=0Ω 2.5 Rc=50kΩ
3.5
25
Control Current :Icont [ A] µ
20
Rc=0Ω 15 Rc=50kΩ
Output Voltage :Vo [V]
3
2 Rc=100kΩ 1.5
10
1 5 0.5 Rc=100kΩ 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]
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Ver.2004-12-22
NJM2898
ELECTRICAL CHARACTERISTICS
NJM2898_3.0V Load Regulation vs. Output Current
0
NJM2898_3.0V Peak Output Current vs. Input Voltage
o
200
@:Ta=25 C Co=1.0 µF(Ceramic) Cp=0.01 µF
Peak Output Current :IoMAX [mA]
-10
Load Regulation :dVo/dIo [mV]
150
-20
100
-30
50
-40
@:Ta=25 oC VIN=4V Co=1.0 µF(Ceramic) Cp=0.01µF 0 50 100 150
- 50
0 4 6 8 10 12 14
Output Current :Io [mA]
Input Voltage :VIN [V]
NJM2898_3.0V Quiescent Current v.s. Input Voltage
2000 @:Ta=25oC Output is open. Co=1.0µF(Ceramic) Cp=0.01 µF including Icont 100
NJM2898_3V Output Noise Voltage vs. Output Current
@:Ta=25 oC V IN=4V LPF:80kHz
1200
Output Noise Voltage :Vn [ Vrms] µ
1600
80
Quiescent Current : Iq µ A] [
60
800
40 Co=1.0 µF(Ceramic) Cp=0.01µF 20 Co=10µF(Tant.) Cp=0.1 µF
400
0 0 5 10 15
0 0.001
0.01
0.1
1
10
100
Input Voltage :Vin [V]
Output Current :Io [mA]
NJM2898_3.0V Ripple Rejection Ratio v.s. Frequency
90 Io=0mA
100
NJM2898_3.0V Ripple Rejection vs. Output Current
90 80
f=10kHz
Ripple Rejection Ratio :RR [dB]
Io=10mA 70 Io=30mA 60
Ripple Rejection : RR (dB)
80
70 f=1kHz
60
50
50
40 @:Ta=25 oC V IN=4.0V ein=200mVrms Co=1 µF(Ceramic) Cp=0.01µF 10 10 100 100 1k 1000 10k 104 100k 105
40
30
30
@:Ta=25 C V IN=4V ein=200mVrms Co=1.0 µF(Ceramic) Cp=0.01µF 0.01 0.1 1 10 100
o
20
20 0.001
Frequency :f [Hz]
Output Current : Io(mA)
Ver.2004-12-22
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NJM2898
ELECTRICAL CHARACTERISTICS
NJM2898_3.0V Equivalent Series Resistance vs. Output Current
100 @:Ta=25 C VIN=4V Co=1.0 µF(Ceramic) Cp=0.01µF
o
NJM2898_3.0V Dropout Voltage v.s. Temperature
0.3 @:Io=60mA Co=1.0 µF(Ceramic) Cp=0.01 µF
Equivalent Series Resistance :ESR Ω ] [
0.25
Dropout Voltage :dVi-o [V]
10 100
10
0.2
STABLE REGION
1
0.15
0.1
0.1
0.05
0.02 0.001
0 0.01 0.1 1 -50 0 50 100
o
150
Output Current :Io [mA]
Temperature :Ta [ C]
NJM2898_3.0V Control Voltage v.s. Temperature
2 @:VIN=4.0V Output is open. Co=1.0 µF(Ceramic) Cp=0.01µF 3.1
NJM2898_3.0V Output Voltage v.s. Tem perature
@:V IN=4.0V Io=30mA Co=1.0 µF(Ceramic) Cp=0.01µF 3.05
Control Voltage :Vcont-off [V]
1.5
Output Voltage :Vo [V]
1
3
0.5
2.95
0 -50 0 50 100
o
2.9 150 -50 0 50 100
o
150
Temperature :Ta [ C]
Temperature :Ta [ C]
NJM2898_3.0V Quiescent Current v.s. Temperature
300 @:V IN=4.0V Output is open. Co=1.0 µF(Ceramic) Cp=0.01µF 0.2
NJM2898_3.0V Line Regulation v.s. Temperature
@:V IN=4.0-9.0V Io=30mA Co=1.0µF(Ceramic) Cp=0.01 µF
250
Line Regulation :dVo/dVin [%/V]
0.1
Quiescent Current : Iq [ A] µ
200
150
0
100
-0.1
50
0 -50 0 50 100
o
150
-0.2 -50
0
50
100
o
150
Temperature :Ta [ C]
Temperature :Ta [ C]
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Ver.2004-12-22
NJM2898
ELECTRICAL CHARACTERISTICS
NJM2898_3.0V Load Regulation v.s. Temperature
0.03 @:V IN=4.0V Io=0-60mA Co=1.0µF(Ceramic) Cp=0.01 µF 3.5
NJM2898_3.0V Output Voltage v.s. Tem perature
0.025
3
Load Regulation :dVo/dIo [%/mA]
2.5 0.02
Output Voltage :Vo [V]
2
0.015
1.5
0.01
1 @:VIN=4.0V Io=30mA Co=1.0µF(Ceramic) Cp=0.01 µF -50 0 50 100 150 200
0.005
0.5
0 -50 0 50 100
o
0 150
Temperature :Ta [ C]
Temperature :Ta ["C]
NJM2898_3.0V Short Circuit Current v.s. Temperature
200 @:V IN=4.0V Output is short to ground. Co=1.0µF(Ceramic) Cp=0.01 µF
Short Circuit Current :Isc [mA]
150
100
50
0 -50 0 50 100
o
150
Temperature :Ta [ C]
NJM2898_3V ON/OFF Transient Response without Load
7 15
7
NJM2898_3V ON/OFF Transient Response
15
6 Control Voltage 5 Output Voltage : Vo [V]
10
6 Control Voltage
10
5 Control Voltage : Vo [V]
Output Voltage : Vo [V]
5
5 Control Voltage : Vo [V]
4 Output Voltage 3
0
4 Output Voltage 3
0
-5
-5
2 @:VIN=4.0V Co=1µF(Ceramic) Cp=0.01 µF Io=0mA
-10
2 @:VIN=4.0V Co=1µF(Ceramic) Cp=0.01 µF Io=0mA
-10
1
-15
1
-15
0
-20
0
-20
-1 0 1 2 3 Time : t [S] 4 5
-25
-1 0 4 8 12 Time : t [mS] 16 20
-25
Ver.2004-12-22
-9-
NJM2898
ELECTRICAL CHARACTERISTICS
NJM2898_3V Line Transient Response
3.12 7
3.1
NJM2898_3V Load Transient Response
150
3.1
6
3.08 Output Current
100
Output Voltage : Vo [V]
3.06
4
Output Voltage : Vo [V]
Input Voltage
3.04
0
3.04
3
3.02
-50
3.02
Output Voltage
2
3
Output Voltage
-100
3 @:Co=1µF(Ceramic) Cp=0.01 µF Io=30mA
1
2.98 @:VIN=4V Co=1 µF(Ceramic) Cp=0.01 µF Io=30mA 0 40 80 120 Time : t [ µ S] 160
-150
2.98
0
2.96
-200
2.96 0 40 80 120 Time : t [ µ S] 160
-1 200
2.94
-250 200
[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.
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Ver.2004-12-22
Output Current : Io [mA]
Input Voltage : V IN [V]
3.08
5
3.06
50
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