NJM2890
2ch LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION The NJM2890 is a dual low dropout voltage regulator. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. FEATURES High Ripple Rejection 70dB typ. (f=1kHz,Vo=3V Version) Output Noise Voltage Vno=30µVrms typ.(Cp=0.01µF) Output capacitor with 1.0uF ceramic capacitor (Vo≥2.7V) Output Current Io(max.)=150mA × 2ch High Precision Output Vo±1.0% Low Dropout Voltage 0.10V typ. (Io=60mA) Operating Voltage Range +2.5V∼+14V (Vo≤2.0V version) ON/OFF Control (Active High) Internal Short Circuit Current Limit Internal Thermal Overload Protection Bipolar Technology Package Outline VSP10 PIN CONFIGURATION PACKAGE OUTLINE
NJM2890R
10 9 8 7 6
PIN FUNCTION 1. CONTROL1 2. VIN1 3. GND 4. VIN2 5. CONTROL2 6. NOISE BYPASS2 7. VOUT2 8. GND 9. VOUT1 10. NOISE BYPASS1
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NJM2890R EQUIVALENT CIRCUIT
VIN1/ VIN2 Cont1/Cont2
Thermal Protection Bandgap Reference
VOUT1/ VOUT2
Noise Bypass1 / Noise Bypass2
GND
NJM2890
(Ta=25°C) RATINGS UNIT +14 V +14(*1) V 320 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. ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT Power Dissipation PD Operating Temperature Topr Storage Temperature Tstg OPERATING RANGE VIN= VIN=+2.5V ∼ +14.0V (In case of Vo2.0V version : 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 Output Voltage Quiescent Current Quiescent Current at Control OFF Output Current Line Regulation Load Regulation Dropout Voltage 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 VNO VCONT(ON) VCONT(OFF) Io=30mA Io=0mA, expect 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∼85°C, Io=10mA f=10Hz∼80kHz, Io=10mA, Vo=3V Version TEST CONDITION MIN. -1.0% − − 150 − − − − − − 1.6 − TYP. − 120 − 200 − − 0.10 70 ±50 30 − − MAX. +1.0% 180 100 0.10 0.03 0.18 − − − − 0.6 UNIT V µA nA mA %/V %/mA V dB ppm/°C µVrms V V
(Vo≤2.0V version : 1CH/2CH : VIN=Vo+1V, CIN=0.1µF, Co=2.2uF, Cp=0.01µF, Ta=25°C)
PARAMETER Output Voltage Quiescent Current Quiescent Current at Control OFF Output Current Line Regulation Load Regulation 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 RR ∆Vo/∆Ta VNO VCONT(ON) VCONT(OFF) Io=30mA Io=0mA, expect Icont VCONT=0V Vo−0.3V VIN=Vo+1V ∼ Vo+6V, Io=30mA Io=0 ∼ 100mA ein=200mVrms,f=1kHz, Io=10mA, Vo=1.8V Version Ta=0∼85°C, Io=10mA f=10Hz∼80kHz, Io=10mA, Vo=1.8V Version TEST CONDITION MIN. -1.0% − − 150 − − − − − 1.6 − TYP. − 120 − 200 − − 75 ±50 22 − − MAX. +1.0% 180 100 0.10 0.03 − − − − 0.6 UNIT V µA nA mA %/V %/mA dB ppm/°C µVrms V V
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.
NJM2890
OUTPUT VOLTAGE RANK LIST Device Name CH1 NJM2890R2121 2.1V NJM2890R2727 2.7V NJM2890R2818 2.8V NJM2890R2828 2.8V NJM2890R0318 3.0V NJM2890R0303 3.0V NJM2890R3325 3.3V NJM2890R3333 3.3V NJM2890R0403 4.0V NJM2890R0521 5.0V Vout CH2 2.1V 2.7V 1.8V 2.8V 1.8V 3.0V 2.5V 3.3V 3.0V 2.1V
TEST CIRCUIT
NOISE BYPASS1
A
ICONT1 VCONT1 V
CONTROL
Cp=0.01µ F
A
IIN1 VIN1 0.1µF
VIN1
VOUT1 1.0µ F*2 (Ceramic) IOUT1 VOUT1
V
NJM2890
GND GND
A
IIN2 VIN2 0.1µF
VIN2
VOUT2 1.0µ F*2 (Ceramic) NOISE BYPASS2 IOUT2 VOUT2
V
A
ICONT2 VCONT2
CONTROL
V
Cp=0.01µ F
*2
Vo≤2.6V version: Co=2.2µF(ceramic)
NJM2890
TYPICAL APPLICATION 1 In the case where ON/OFF Control is not required:
CONTROL R (0∼300kΩ) NOISE BYPASS1
Cp=0.01µ F
VIN1
VIN1
VOUT1 1.0µ F
*3
VOUT1
0.1µF
NJM2890
GND GND
VIN2
VIN2
VOUT2 1.0µF*3 VOUT2
0.1µF R (0∼300kΩ) CONTROL NOISE BYPASS2
Cp=0.01µ F
*3
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”.
NJM2890
2 In use of ON/OFF CONTROL:
CONTROL R (0∼300kΩ) NOISE BYPASS1 Cp=0.01µ F
VIN1
VIN1
VOUT1 VOUT1 1.0µ F*3
0.1µF
NJM2890
GND GND
VIN2
VIN2
VOUT2 1.0µF*3 VOUT2
0.1µ F R (0∼300kΩ) CONTROL NOISE BYPASS2
Cp=0.01µ F *3 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 0.01µF greater to avoid the problem.
NJM2890
ELECTRICAL CHARACTERISTICS
NJM2890_3.0V Output Voltage vs. Input Voltage
@:Ta=25oC Co=1.0µF(Ceramic) Cp=0.01µF 3.1
3.2
4 3.5
NJM2890_3.0V Output Voltage vs. Output Current
@:Ta=25 C V IN=4V Co=1.0µF(Ceramic) Cp=0.01µF
o
3
Output Voltage : Vo(V ) Vo(V (V)
Io=0A 3
Output Voltage : Vo(V)
3.2 3.3 3.4
2.5
2
2.9 Io=30mA 2.8 Io=100mA
1.5 1
0.5 0 0 0.05 0.1 0.15 0.2 0.25 0.3
2.7 2.7
2.8
2.9
3
3.1
Input Voltage : V IN(V)
Output Current : Io(A)
20
NJM2890_3.0V Groun d Pin Current vs. Ou tput Cu rren t
@:Ta=25oC V IN=4V Co=1.0µF(Ceramic) Cp=0.01µF
0.3
NJM2890_3.0V Dropout Voltage vs. O utput Current
@:Ta=25oC Co=1.0µF(Ceramic) Cp=0.01µF
0.25
G Ground Pi n Current : I ND (mA) (mA)
15
Dropout Voltage:dV I-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)
60
NJM2890_3.0V Control Curre nt vs. Control Voltage
@:Ta=25oC V IN=4V Co=1.0µF(Ceramic) Cp=0.01µF Io=30mA
4
NJM2890_3.0V Output Voltage vs. Control Voltage
50
3.5
Control Curre nt : Ico nt( µA)
3
Rc=0Ω
40
Output Voltage : Vo(V ) Vo(V (V)
2.5 Rc=100kΩ
30
2
1.5
20 Rc=0Ω 10 Rc=100kΩ
Rc=50kΩ
o
1
0.5 Rc=50kΩ 0 0.5
@:Ta=25 C V IN=4V Co=1.0µF(Ceramic) Cp=0.01µF Io=30mA 0 0.5 1 1.5 2 2.5 3
0 1 1.5 2 2.5
0 3.5 4
Control Voltage : Vcont(V)
3
Control Voltage : Vcont(V)
NJM2890
ELECTRICAL CHARACTERISTICS
NJM2890_3.0V Load Regulati on vs. Ou tput Curren t
@:Ta=25oC VIN=4V Co=1.0µF(Ceramic) Cp=0.01µF 2000
0
NJM2890_3.0V Qui escent Curren t v.s. In put Voltage1
@:Ta=25oC Output is open. Co=1.0µF(Ceramic) C p=0.01µF including Icont
-10
Load Regu lati on : dVo/dIo(mV) dVo/dIo(m (mV)
-20
Quiescent Current : IQ (µA)
0 50 100 150 200
1500
1000
-30
500
-40
-50
0 0 5 10 15
Output Current : Io(mA)
I nput Input Vol tage : VIN(V)
300
NJM2890_3.0V Output Noi se Voltage vs. Noise Bypass Capacitor
@:Ta=25oC VIN=4.0V Co=1.0µF(Ceramic)
100
NJM2890_3.0V Output Noise Voltage vs. Output Current
@:Ta=25 C V IN=4.0V Cp=0.01µF LPF:100kHz
o
250
Outpu t Noise Vol tage : Vn( µ Vrms)
200
Outpu t Noise Vol tage : Vn( µ Vrms)
80
60 Co=1.0µF(Ceramic) 40
150
100
50
20 Co=2.2µF(Ceramic) 0 0.001
0
1p
10p
100p
1000p
0.01m
0.1m
0.01
0.1
1
10
100
Noise Bypass Capacitor : Cp(F)
Output Current : Io(mA)
90
NJM2890_3.0V Ripple Rejection Ratio vs. Frequency
Io=0mA
80
Ri pple Rejecti on Ratio : RR (dB)
Io=10mA
70
Io=30mA
60
50 @:Ta=25oC Co=1.0µF(Ceramic) Cp=0.01µF VIN=4V ein=200mVrms 10 100 1k 10k 100k
40
30
Frequency : f (Hz)
NJM2890
ELECTRICAL CHARACTERISTICS
NJM2890_3.0V Ripple Re je ction vs. Output Curre nt(Vo=3.0V)
80
100
NJM2890_3.0V Equivalent Serise Re sistance vs. Output Current
@:Ta=25oC VIN=4V Co=1.0µF(Ceramic) Cp=0.01µF
70
Equivalent Serise Re sistance : ESR(Ω )
f=1kHz
Ripple Re jection : RR(dB)
10
60 f=10kHz 50 @:Ta=25oC V IN=4V ein=200mVrms Co=1.0µF(Ceramic) Cp=0.01µF
1
Oscillation Free
40
0.1
30
0.001
0.01
0.1
1
10
100
0.02
1µ
10µ
100µ
1m
10m
100m
Output Current : Io(mA)
Output Curre nt : Io(mA)
0.3
NJM2890_3.0V Dropout Vol tage vs. Temperature
@:V IN=4V Io=60mA Co=1.0µF(Ceramic) C p=0.01µF
2
NJM2890_3.0V Control Voltage vs. Temperature
0.25
Control Voltage : VC ON T( OFF ) (V) (V)
1.5
Dropout Voltage:dV I-O (V) ( V)
0.2
0.15
1
0.1
0.5 @:V IN=4V Output is Open. Co=1.0µF(Ceramic) Cp=0.01µF 0 -50 0 50 100 150
0.05
0
-50
0
o Temperature : Ta ( C)
50
o
100
150
o Temperature : Ta ( C)
o
3.1
NJM2890_3.0V Output Voltage v.s Temperature
NJM2890_3.0V Quiescent Current v.s. Temperature
300 @:VIN=4V Output is open. Co=1.0µF(Ceramic) Cp=0.01µF including Icont
250 3.05
Output Voltage : Vo [V]
Quiescent Current : IQ (µA)
150
200
3
150
100
2.95
VIN=4V Io=30mA Co=1.0µ A Cp=0.01µ A
-50 0 50
o Temperature Ta ( C) o
50
2.9
100
0 -50 0 50
Temperature : Ta ( C)
o
100
150
NJM2890
ELECTRICAL CHARACTERISTICS
NJM2890_3.0V Line Regulation v.s. Temperature
0.1 @:dVIN=4-9V Io=30mA Co=1.0µF(Ceramic) Cp=0.01µ F
0.03
NJM2890_3.0V Load Regulation v.s. Temperature
@:Ta=25 C V IN=4.0V Co=1.0µF(Ceramic) Cp=0.01µF Io=0-100mA
o
0.025
0.05
Road Regulation : dVo/dIo (%/mA)
Line Regulation : dVo/dIo (%/V)
0.02
0
0.015
0.01
-0.05
0.005
-0.1 -50
0
0 50
Temperature : Ta ( C)
o
100
150
-50
0
o Temperature : Ta ( C)
50
o
100
150
3.5
NJM2890_3.0V Output Voltage vs. Temperature
NJM2890_3.0V Short Ci rcuit Current v.s. Temperature
400 350 @:V IN=4V Output is short to ground. Co=1.0µF(Ceramic) Cp=0.01µF
3
Short Ci rcui t Current : IS C (mA) (mA)
50 100
o
Output Voltage : Vo (V)
2.5
300 250 200 150
2
1.5
1 VIN=4V Io=30mA Co=1.0µF Cp=0.01µF
100 50 0 -50 0
0.5
0
-50
0
150
200
Temperature : Ta ( C)
Temperature : Ta ( C)
50
o
100
150
NJM2890_3.0V ON/OFF Trans ie nt Re sponse
7 6 5 Output Vo lt ag e : Vo [ V] 4 Output Voltage 3 2 1 0 -1 0 4 8 12 Time : t [mS] 16 20 -10 -15 -20 -25 -30 Control Voltage 10 5 0 -5 7 6 5 Output Vo lt ag e : Vo [ V] 4 3
NJM2890_3.0V ON/OFF Trans ie nt Response without load
10 5 Control Voltage 0 -5 -10 Output Voltage 2 1 0 -1 0 1 2 3 Time : t [mS] 4 5 -15 -20 -25 -30
Co nt rol Voltag e : Vo [V]
@:Ta=25 C VDD=4.0V Co=1.0µF(Ceramic) Cp=0.01µ F Io=30mA
o
@:Ta=25 C VDD=4.0V Co=1.0µF(Ceramic) Cp=0.01µ F Io=0mA
o
Co nt rol Voltag e : Vo [V]
NJM2890
ELECTRICAL CHARACTERISTICS
NJM2890_3.0V Lo ad Transient Re spons e
3.1 3.08 3.06 Output Vo ltag e : Vo [ V] 3.04 3.02 Output Voltage 3 2.98 2.96 2.94 0 40 80 120 Time : t [µ S] 160 200 -100 -150 -200 -250 Output Current 150 100 50 0 -50 3.1 3.08 Input Volage Output Cuurent : Io [mA] 3.06 Output Vo ltag e : Vo [ V] 3.04 3.02 Output Voltage 3 2.98 2.96 2.94 0 40 80 120 Time : t [µ S] 160 200 1 0 -1 -2 4 3 2 Input Voltage : V I N [V] [V]
NJM2890_3.0V Line Transie nt Re sponse
6 5
@:Ta=25 C VDD=4.0V Co=1.0µF(Ceramic) Cp=0.01µ F
o
@:Ta=25 C VDD=4.0V Co=1.0µF(Ceramic) Cp=0.01µ F Io=30mA
o
[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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