NJRC NJM2891

NJM2891
2ch LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
The NJM2891 is low dropout voltage regulator designed
for cellular phone application.
Advanced Bipolar technology achieves low noise, high ripple
rejection and low quiescent current.
PACKAGE OUTLINE
NJM2891PB1
FEATURES
High Ripple Rejection
70dB typ. (f=1kHz , Vo=3V Version)
Output Noise Voltage
Vno=30µVrms typ.(Cp=0.01µF)
Output capacitor with 1.0µF 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)
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
1
2
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
BOTTOM
NJM2891PB1
EQUIVALENT CIRCUIT
VIN1/ VIN2
VOUT1/ VOUT2
Cont1/Cont2
Thermal
Protection
Bandgap
Reference
GND
Noise Bypass1 /
Noise Bypass2
NJM2891
(Ta=25°C)
RATINGS
UNIT
+14
V
+14(*1)
V
300(*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):On board. (25mm×25mm×0.2mm)
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
VIN
Control Voltage
VCONT
Power Dissipation
PD
Operating Temperature
Topr
Storage Temperature
Tstg
Operating Voltage
VIN=+2.5V ∼ +14.0V (In case of Vo<2.1V)
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. MAX. UNIT
+1.0%
V
Output Voltage
Vo
Io=30mA
-1.0%
−
Quiescent Current
Io=0mA, expect Icont
IQ
120
180
µA
−
Quiescent Current
100
nA
VCONT=0V
IQ(OFF)
−
−
at Control OFF
mA
Output Current
Io
150
200
Vo−0.3V
−
Line Regulation
0.10 %/V
∆Vo/∆VIN
VIN=Vo+1V ∼ Vo+6V, Io=30mA
−
−
Load Regulation
0.03 %/mA
∆Vo/∆Io
Io=0 ∼ 100mA
−
−
Dropout Voltage
Io=60mA
0.10 0.18
V
∆VI−O
−
ein=200mVrms,f=1kHz, Io=10mA,
70
dB
Ripple Rejection
RR
−
−
Vo=3V Version
Average Temperature
∆Vo/∆Ta
Ta=0∼85°C, Io=10mA
±50
−
− ppm/°C
Coefficient of Output Voltage
f=10Hz∼80kHz, Io=10mA,
30
Output Noise Voltage
VNO
µVrms
−
−
Vo=3V Version
Control Voltage for ON-state VCONT(ON)
V
1.6
−
−
Control Voltage for OFF-state VCONT(OFF)
0.6
V
−
−
(*3):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.
OUTPUT VOLTAGE RANK LIST
Device Name
CH1
NJM2891PB1-2121
2.1V
NJM2891PB1-2725
2.7V
NJM2891PB1-2727
2.7V
NJM2891PB1-2825
2.8V
NJM2891PB1-2828
2.8V
NJM2891PB1-J18
2.85V
NJM2891PB1-2929
2.9V
NJM2891PB1-0328
3.0V
NJM2891PB1-0303
3.0V
NJM2891PB1-3332
3.3V
NJM2891PB1-0521
5.0V
Vout
CH2
2.1V
2.5V
2.7V
2.5V
2.8V
1.8V
2.9V
2.8V
3.0V
3.2V
2.1V
NJM2891
TEST CIRCUIT
A
I CONT1
1.0µF *note1
V
VOUT1
V
IOUT1
VCONT1
VOUT1
VOUT1
CONTROL1
NOISE
BYPASS1
A
VIN1
IIN1
VIN1
0.1µF
Cp=0.01µF
NJM2891
NC
A
VIN2
IIN2
VIN2
0.1µF
NOISE
BYPASS2
CONTROL2
Cp=0.01µF
VOUT2
V
VOUT2
IOUT2
1.0µF *4
(ceramic)
*4 Vo≤2.6V version: Co=2.2µF(ceramic)
VOUT2
GND
A
ICONT2
V
VCONT2
NJM2891
TYPICAL APPLICATION
1 In the case where ON/OFF Control is not required:
VOUT1
1.0µF *note1
VOUT1
VOUT1
R
CONTROL1
NOISE
BYPASS1
(0~300kΩ)
VIN1
VIN1
Cp=0.01µF
0.1µF
NJM2891
NC
VIN2
VIN2
R
NOISE
BYPASS2
Cp=0.01µF
VOUT2
0.1µF
(0~300kΩ)
CONTROL2
VOUT2
GND
VOUT2
1.0µF *5
*5 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”.
NJM2891
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
NJM2891
NC
VIN2
VIN2
0.1µF
NOISE
BYPASS2
Cp=0.01µF
VOUT2
CONTROL2
VOUT2
R
(0~300kΩ)
GND
VOUT2
1.0µF *5
*5 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.
NJM2891
ELECTRICAL CHARACTERISTICS
NJM2891_3.0V
Output Voltage vs. Input Voltage
3.2
NJM2891_3.0V
Output Voltage vs. Output Current
4
@:Ta=25oC
Co=1.0µF(Ceramic)
Cp=0.01µF
o
@:Ta=25 C
V IN=4V
Co=1.0µF(Ceramic)
Cp=0.01µF
3.5
3.1
Output Voltage : Vo(V)
Vo(V
(V
(V))
Output Voltage : Vo
3
Io=0A
3
2.9
Io=30mA
2.5
2
1.5
1
2.8
Io=100mA
2.7
2.7
2.8
2.9
3
0.5
3.1
3.2
3.3
0
3.4
0
0.05
0.1
NJM2891_3.0V
Groun d Pin Current vs. Ou tput Cu rren t
20
0.25
0.3
@:Ta=25oC
Co=1.0µF(Ceramic)
Cp=0.01µF
0.25
15
Dropout Voltage:dV I-O ( V)
(mA))
Ground Pi n Current : IG ND (mA
0.2
NJM2890_3.0V
Dropout Voltage vs. O utput Current
0.3
@:Ta=25oC
V IN=4V
Co=1.0µF(Ceramic)
Cp=0.01µF
10
5
0.2
0.15
0.1
0.05
0
0
50
100
150
0
200
0
50
NJM2891_3.0V
Control Curre nt vs. Control Voltage
60
Vo(V
(V
(V))
Output Voltage : Vo
3
30
20
Rc=0Ω
10
Rc=0Ω
2.5
Rc=100kΩ
2
1.5
Rc=50kΩ
1
o
@:Ta=25 C
V IN=4V
Co=1.0µF(Ceramic)
Cp=0.01µF
Io=30mA
0.5
Rc=50kΩ
0
0.5
1
1.5
2
2.5
200
3.5
40
0
150
NJM2891_3.0V
Output Voltage vs. Control Voltage
4
@:Ta=25oC
V IN=4V
Co=1.0µF(Ceramic)
Cp=0.01µF
Io=30mA
50
100
Output Current:Io(mA)
Output Current : Io(mA)
Control Curre nt : Ico nt( µA)
0.15
Output Current : Io(A)
Input Voltage : V IN(V)
3
Control Voltage : Vcont(V)
Rc=100kΩ
0
3.5
4
0
0.5
1
1.5
2
Control Voltage : Vcont(V)
2.5
3
NJM2891
ELECTRICAL CHARACTERISTICS
0
Quiescent Current : IQ (µA)
dVo/dIo(m
(m
(mV)
V)
Load Regu lati on : dVo/dIo
2000
@:Ta=25oC
VIN=4V
Co=1.0µF(Ceramic)
Cp=0.01µF
-10
-20
-30
-40
-50
NJM2891_3.0V
Qui escent Curren t v.s. In put Voltage1
NJM2891_3.0V
Load Regulati on vs. Ou tput Curren t
0
50
100
150
@:Ta=25oC
Output is open.
Co=1.0µF(Ceramic)
Cp=0.01µF
including Icont
1500
1000
500
0
200
0
5
300
NJM2891_3.0V
Output Noi se Voltage vs. Noise Bypass Capacitor
150
100
50
1p
100p
10p
1000p
0.01m
0.1m
Noise Bypass Capacitor : Cp(F)
Io=0mA
80
Ri pple Rejecti on Ratio : RR (dB)
NJM2891_3.0V
Output Noise Voltage vs. Output Current
@:Ta=25 C
V IN=4.0V
Cp=0.01µF
LPF:100kHz
Io=10mA
70
Io=30mA
60
50
@:Ta=25oC
Co=1.0µF(Ceramic)
Cp=0.01µF
VIN=4V
ein=200mVrms
40
10
100
1k
Frequency : f (Hz)
10k
80
60
Co=1.0µF(Ceramic)
40
20
Co=2.2µF(Ceramic)
0
0.001
0.01
0.1
1
Output Current : Io(mA)
NJM2891_3.0V
Ripple Rejection Ratio vs. Frequency
90
15
o
Outpu t Noise Vol tage : Vn( µ Vrms)
Outpu t Noise Vol tage : Vn( µ Vrms)
200
30
100
@:Ta=25oC
VIN=4.0V
Co=1.0µF(Ceramic)
250
0
10
Input Vol tage : VIN(V)
Output Current : Io(mA)
100k
10
100
NJM2891
ELECTRICAL CHARACTERISTICS
NJM2891_3.0V
Ripple Re je ction vs. Output Curre nt(Vo=3.0V)
NJM2891_3.0V
Equivalent Serise Re sistance vs. Output Current
100
80
ESR(Ω
Ω)
Equivalent Serise Re sistance : ESR(
f=1kHz
Ripple Re jection : RR(dB)
70
60
f=10kHz
50
@:Ta=25oC
V IN=4V
ein=200mVrms
Co=1.0µF(Ceramic)
Cp=0.01µF
40
30
0.001
0.01
0.1
1
10
@:Ta=25oC
VIN=4V
Co=1.0µF(Ceramic)
Cp=0.01µF
10
0.1
0.02
100
Oscillation Free
1
1µ
10µ
Output Current : Io(mA)
NJM2891_3.0V
Dropout Vol tage vs. Temperature
0.3
Control Voltage : VC ON T( OFF ) (V)
Dropout Voltage:dV I-O (V)
0.15
0.1
0.05
1.5
1
0.5
@:V IN=4V
Output is Open.
Co=1.0µF(Ceramic)
Cp=0.01µF
0
-50
0
50
o
Temperature : Ta (o C)
100
-50
150
0
50
Quiescent Current : IQ (µA)
3
VIN=4V
Io=30mA
Co=1.0µ A
Cp=0.01µ A
0
50
100
o
Temperature Ta ( o C)
150
@:VIN=4V
Output is open.
Co=1.0µF(Ceramic)
Cp=0.01µF
including Icont
250
-50
100
300
3.05
2.95
o
Temperature : Ta (o C)
NJM2891_3.0V
Quiescent Current v.s. Temperature
NJM2891_3.0V
Output Voltage v.s Temperature
3.1
Output Voltage : Vo [V]
100m
NJM2891_3.0V
Control Voltage vs. Temperature
2
0.2
2.9
10m
@:V IN=4V
Io=60mA
Co=1.0µF(Ceramic)
Cp=0.01µF
0.25
0
1m
100µ
Output Curre nt : Io(mA)
200
150
100
50
150
0
-50
0
50
o
Temperature : Ta ( C)
100
150
NJM2891
ELECTRICAL CHARACTERISTICS
NJM2891_3.0V
Line Regulation v.s. Temperature
o
@:dVIN=4-9V
Io=30mA
Co=1.0µF(Ceramic)
Cp=0.01µF
0.05
0
-0.05
0.02
0.015
0.01
0.005
0
0
50
o
100
150
-50
0
Temperature : Ta ( C)
Short Ci rcui t Current : IS C (mA)
Output Voltage : Vo (V)
2
1.5
1
VIN=4V
Io=30mA
Co=1.0µF
Cp=0.01µF
-50
300
250
200
150
100
50
0
50
100
150
0
200
-50
o
0
Temperature : Ta ( C)
NJM2891_3.0V
ON/OFF Trans ie nt Re sponse
Output Vo lt ag e : Vo [ V]
7
5
6
0
-5
4
Output Voltage
-10
3
-15
2
o
@:Ta=25 C
VDD=4.0V
Co=1.0µF(Ceramic)
Cp=0.01µF
Io=30mA
0
-1
0
4
8
12
Time : t [mS]
o
100
150
16
20
10
5
Control Voltage
5
Output Vo lt ag e : Vo [ V]
Control Voltage
10
Co nt rol Voltag e : Vo [V]
6
1
50
Temperature : Ta ( C)
NJM2891_3.0V
ON/OFF Trans ie nt Response without load
7
5
150
@:V IN=4V
Output is short to ground.
Co=1.0µF(Ceramic)
Cp=0.01µF
350
2.5
0
100
400
3
0.5
o
NJM2891_3.0V
Short Ci rcuit Current v.s. Temperature
NJM2891_3.0V
Output Voltage vs. Temperature
3.5
50
Temperature : Ta (o C)
0
-5
4
-10
3
Output Voltage
-15
2
-20
1
-25
0
-30
-1
-20
o
@:Ta=25 C
VDD=4.0V
Co=1.0µF(Ceramic)
Cp=0.01µF
Io=0mA
-25
-30
0
1
2
3
Time : t [mS]
4
5
Co nt rol Voltag e : Vo [V]
-0.1
-50
@:Ta=25 C
V IN=4.0V
Co=1.0µF(Ceramic)
Cp=0.01µF
Io=0-100mA
0.025
Road Regulation : dVo/dIo (%/mA)
Line Regulation : dVo/dIo (%/V)
NJM2891_3.0V
Load Regulation v.s. Temperature
0.03
0.1
NJM2891
ELECTRICAL CHARACTERISTICS
NJM2891_3.0V
Lo ad Transient Re spons e
NJM2891_3.0V
Line Transie nt Re sponse
3.1
3.08
100
3.08
0
-50
3.02
Output Voltage
3
-100
2.98
o
@:Ta=25 C
VDD=4.0V
Co=1.0µF(Ceramic)
Cp=0.01µF
2.96
2.94
0
40
6
5
80
120
Time : t [µ
[µ S]
160
200
3.06
4
3.04
3
2
3.02
Output Voltage
3
-150
2.98
-200
2.96
-250
2.94
1
Input Voltage : V I N [V]
3.04
Output Vo ltag e : Vo [ V]
50
Output Cuurent : Io [mA]
Output Vo ltag e : Vo [ V]
3.1
Input Volage
Output Current
3.06
150
0
o
@:Ta=25 C
VDD=4.0V
Co=1.0µF(Ceramic)
Cp=0.01µF
Io=30mA
-1
-2
0
40
80
120
160
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.