NJRC NJM2898

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
6
6
10
11
5
5
11
12
4
4
12
2
1
3
3
TOP 2
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
1
UNDER
NJM2898PB1
EQUIVALENT CIRCUIT
VIN 1/VIN2
VOUT1/V OUT2
Control1/
Control2
Thermal
Protection
Bandgap
Reference
Noise Bypass1/
Noise Bypass2
GND
Ver.2004-12-22
-1-
NJM2898
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
VIN
Control Voltage
VCONT
Power Dissipation
PD
Operating Temperature
Topr
Storage Temperature
Tstg
(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)
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.
MAX.
+1.0%
180
UNIT
V
µA
100
nA
0.10
0.03
0.18
mA
%/V
%/mA
V
−
dB
−
ppm/°C
−
µVrms
µVrms
−
V
0.6
V
OUTPUT VOLTAGE RANK LIST
Device Name
NJM2898PB1-2828
NJM2898PB1-JJ
NJM2898PB1-0303
NJM2898PB1-0521
-2-
VOUT
CH1
2.8V
2.85V
3.0V
5.0V
CH2
2.8V
2.85V
3.0V
2.1V
Ver.2004-12-22
NJM2898
TEST CIRCUIT
A
I CONT1
*note1
1.0µF
V
VOUT1
V
IOUT1
VCONT1
VOUT1
VOUT1
CONTROL1
NOISE
BYPASS1
A
VIN1
IIN1
VIN1
0.1µF
Cp=0.01µF
NJM2898
NC
A
VIN2
IIN2
VIN2
0.1µF
NOISE
BYPASS2
CONTROL2
Cp=0.01µF
VOUT2
VOUT2
GND
A
I CONT2
V
VCONT2
1.0µF*3
(ceramic)
V
VOUT2
IOUT2
*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
R
CONTROL1
(0 ∼ 300kΩ)
NOISE
BYPASS1
VIN1
VIN1
Cp=0.01µF
0.1µF
NJM2898
NC
VIN2
VIN2
R
NOISE
BYPASS2
0.1µF
(0 ∼ 300kΩ)
CONTROL2
Cp=0.01µF
VOUT2
VOUT2
GND
VOUT2
1.0µF*4
*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”.
-4-
Ver.2004-12-22
NJM2898
2 In use of ON/OFF CONTROL:
VOUT1
1.0µF*note1
R
(0 ∼ 300kΩ)
VOUT1
VOUT1
CONTROL1
NOISE
BYPASS1
VIN1
VIN1
Cp=0.01µF
0.1µF
NJM2898
NC
VIN2
VIN2
0.1µF
NOISE
BYPASS2
CONTROL2
R
(0 ∼ 300kΩ)
Cp=0.01µF
VOUT2
VOUT2
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_3.0V
Output Voltage vs. Output Current
NJM2898_3V
Output Voltage v.s. Input Voltage
3.2
4
@:Ta=25oC
Co=1.0µF(Ceramic)
Cp=0.01µF
3.5
3
Output Voltage :Vo [V]
Output Voltage :Vo [V]
3.1
Io=0A
3
2.9
Io=30mA
2.5
2
1.5
1
@:Ta=25oC
V IN=4V
Co=1.0µF(Ceramic)
Cp=0.01µF
2.8
0.5
Io=100mA
2.7
0
2.7
2.8
2.9
3
3.1
3.2
3.3
3.4
3.5
0
50
100
NJM2898_3V
Ground Pin Current vs. Output Voltage
200
NJM2898_3.0V
Dropout Voltage vs. Output Current
20
0.3
o
@:Ta=25 C
V IN=4V
Co=1.0µF(Ceramic)
Cp=0.01µF
@:Ta=25oC
Co=1.0µF(Ceramic)
Cp=0.01µF
0.25
15
Dropout Voltage :dVi-o [V]
Ground Pin Current :Ignd [mA]
150
Output Current :Io [mA]
Input Voltage :VIN [V]
10
5
0.2
0.15
0.1
0.05
0
0
0
20
40
60
80
100
120
0
20
Output Current :Io [mA]
80
100
120
4
30
@:Ta=25oC
V IN=4.0V
Co=1.0µF(Ceramic)
Cp=0.01µF
Io=30mA
@:Ta=25 oC
VIN=4.0V
Co=1.0µF(Ceramic)
Cp=0.01µF
Io=30mA
3.5
Output Voltage :Vo [V]
Control Current :Icont [µ A]
60
NJM2898_3.0V
Output Voltage v.s. Control Voltage
NJM2898_3.0V
Control Current v.s. Control Voltage
25
40
Output Current :Io [mA]
20
Rc=0Ω
15
Rc=50kΩ
10
3
Rc=0Ω
2.5
Rc=50kΩ
2
Rc=100kΩ
1.5
1
5
0.5
Rc=100kΩ
0
0
0
0.5
1
1.5
2
2.5
3
Control Voltage :Vcont [V]
-6-
3.5
4
0
0.5
1
1.5
2
2.5
3
Control Voltage :Vcont [V]
Ver.2004-12-22
NJM2898
ELECTRICAL CHARACTERISTICS
NJM2898_3.0V
Peak Output Current vs. Input Voltage
NJM2898_3.0V
Load Regulation vs. Output Current
0
o
@:Ta=25 C
Co=1.0µF(Ceramic)
Cp=0.01µF
200
Peak Output Current :IoMAX [mA]
Load Regulation :dVo/dIo [mV]
-10
-20
-30
-40
@:Ta=25 oC
VIN=4V
Co=1.0µF(Ceramic)
Cp=0.01µF
150
100
50
0
-50
0
50
100
4
150
6
NJM2898_3.0V
Quiescent Current v.s. Input Voltage
2000
@:Ta=25oC
Output is open.
Co=1.0µF(Ceramic)
Cp=0.01µF
including Icont
12
14
@:Ta=25 oC
V IN=4V
LPF:80kHz
Output Noise Voltage :Vn [µ Vrms]
Quiescent Current : Iq µ
[ A]
10
NJM2898_3V
Output Noise Voltage vs. Output Current
100
1600
8
Input Voltage :VIN [V]
Output Current :Io [mA]
1200
800
400
80
60
40
Co=1.0µF(Ceramic)
Cp=0.01µF
20
Co=10µF(Tant.)
Cp=0.1µF
0
0
5
10
0
0.001
15
0.01
0.1
1
10
100
Output Current :Io [mA]
Input Voltage :Vin [V]
NJM2898_3.0V
Ripple Rejection Ratio v.s. Frequency
NJM2898_3.0V
Ripple Rejection vs. Output Current
100
90
Io=0mA
90
f=10kHz
Io=10mA
Ripple Rejection : RR (dB)
Ripple Rejection Ratio :RR [dB]
80
70
Io=30mA
60
50
40
@:Ta=25 oC
V IN=4.0V
ein=200mVrms
Co=1µF(Ceramic)
Cp=0.01µF
30
20
10
10
100
100
70
1k
1000
4
10k
10
100k
105
f=1kHz
60
50
40
30
Frequency :f [Hz]
Ver.2004-12-22
80
o
@:Ta=25 C
V IN=4V
ein=200mVrms
Co=1.0µF(Ceramic)
Cp=0.01µF
20
0.001
0.01
0.1
1
10
100
Output Current : Io(mA)
-7-
NJM2898
ELECTRICAL CHARACTERISTICS
NJM2898_3.0V
Equivalent Series Resistance vs. Output Current
NJM2898_3.0V
Dropout Voltage v.s. Temperature
100
0.3
@:Io=60mA
Co=1.0µF(Ceramic)
Cp=0.01µF
o
Equivalent Series Resistance :ESR Ω
[]
@:Ta=25 C
VIN=4V
Co=1.0 µF(Ceramic)
Cp=0.01µF
0.25
Dropout Voltage :dVi-o [V]
10
STABLE REGION
1
0.1
0.2
0.15
0.1
0.05
0.02
0.001
0
0.01
0.1
1
10
100
-50
0
50
NJM2898_3.0V
Output Voltage v.s. Tem perature
3.1
2
@:VIN=4.0V
Output is open.
Co=1.0µF(Ceramic)
Cp=0.01µF
@:V IN=4.0V
Io=30mA
Co=1.0µF(Ceramic)
Cp=0.01µF
1.5
3.05
Output Voltage :Vo [V]
Control Voltage :Vcont-off [V]
150
Temperature :Ta [ C]
NJM2898_3.0V
Control Voltage v.s. Temperature
1
3
2.95
0.5
0
2.9
-50
0
50
100
-50
150
0
100
Temperature :Ta [ C]
Temperature :Ta [ C]
NJM2898_3.0V
Quiescent Current v.s. Temperature
NJM2898_3.0V
Line Regulation v.s. Temperature
150
0.2
300
@:V IN=4.0-9.0V
Io=30mA
Co=1.0µF(Ceramic)
Cp=0.01µF
@:V IN=4.0V
Output is open.
Co=1.0µF(Ceramic)
Cp=0.01µF
Line Regulation :dVo/dVin [%/V]
250
50
o
o
Quiescent Current : Iq [µ A]
100
o
Output Current :Io [mA]
200
150
100
0.1
0
-0.1
50
0
-50
0
50
100
o
Temperature :Ta [ C]
-8-
150
-0.2
-50
0
50
100
150
o
Temperature :Ta [ C]
Ver.2004-12-22
NJM2898
ELECTRICAL CHARACTERISTICS
NJM2898_3.0V
Output Voltage v.s. Tem perature
NJM2898_3.0V
Load Regulation v.s. Temperature
3.5
0.03
@:V IN=4.0V
Io=0-60mA
Co=1.0µF(Ceramic)
Cp=0.01µF
3
2.5
Output Voltage :Vo [V]
Load Regulation :dVo/dIo [%/mA]
0.025
0.02
0.015
0.01
0.005
2
1.5
1
@:VIN=4.0V
Io=30mA
Co=1.0µF(Ceramic)
Cp=0.01µF
0.5
0
0
-50
0
50
100
-50
150
0
50
o
Temperature :Ta [ C]
100
150
200
Temperature :Ta ["C]
NJM2898_3.0V
Short Circuit Current v.s. Temperature
200
Short Circuit Current :Isc [mA]
@:V IN=4.0V
Output is short to ground.
Co=1.0µF(Ceramic)
Cp=0.01µF
150
100
50
0
-50
0
50
100
150
o
Temperature :Ta [ C]
NJM2898_3V
ON/OFF Transient Response
NJM2898_3V
ON/OFF Transient Response without Load
7
6
15
7
10
6
15
10
Control Voltage
4
0
Output Voltage
3
-5
2
-10
@:VIN=4.0V
Co=1µF(Ceramic)
Cp=0.01µF
Io=0mA
1
0
-1
0
1
2
3
Time : t [S]
Ver.2004-12-22
4
5
5
5
4
0
Output Voltage
3
-5
2
-10
-15
1
-20
0
-25
-1
@:VIN=4.0V
Co=1µF(Ceramic)
Cp=0.01µF
Io=0mA
Control Voltage : Vo [V]
5
Output Voltage : Vo [V]
5
Control Voltage : Vo [V]
Output Voltage : Vo [V]
Control Voltage
-15
-20
-25
0
4
8
12
16
20
Time : t [mS]
-9-
NJM2898
ELECTRICAL CHARACTERISTICS
NJM2898_3V
Load Transient Response
NJM2898_3V
Line Transient Response
3.12
7
3.1
3.1
6
3.08
150
100
3.06
4
3.04
3
3.02
2
Output Voltage
1
3
@:Co=1µF(Ceramic)
Cp=0.01µF
Io=30mA
2.98
2.96
0
40
80
120
Time : t [µ
µ S]
160
0
-1
200
3.06
50
3.04
0
3.02
-50
3
-100
Output Voltage
Output Current : Io [mA]
Output Voltage : Vo [V]
Input Voltage
Output Voltage : Vo [V]
5
3.08
Input Voltage : V IN [V]
Output Current
-150
2.98
@:VIN=4V
Co=1µF(Ceramic)
Cp=0.01µF
Io=30mA
2.96
2.94
0
40
80
120
160
-200
-250
200
Time : t [µ
µ S]
[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.
- 10 -
Ver.2004-12-22