NJM2881/82
-1-
Ver.2006-02-22
LOW DROPOUT VOLTAGE REGULATOR
! GENERAL DESCRI PTION ! PACKAGE OUTLINE
NJM2881/82 is a low dropout voltage regulator with ON/OFF
control.
Advanced Bipolar technology achieves low noise, high ripple
rejection and low quiescent current.
It is mounted on SOT-23-5 as small package and 1.0µF ceramic
capacitor is available. Therefore it is suitable for cellular phone,
camcorder , IC decoder , camera, and other portable items.
! FEATURES
" High Ripple Rejection 75dB typ. (f=1kHz ,V o=3V version)
" Low Output Noise V oltage Vno=30µV rms (Cp=0.01µF)
" Output capacitor with 1.0µF ceramic capacitor (V o≥2.7 V)
" Output Current Io(max.)=300mA
" High Precision Output V o±1. 0%
" Low Dropout V oltage 0.10V typ. (Io=100mA)
" ON/OFF Control (Active High)
" Internal Short Circuit Current Limit
" Internal Thermal Overload Protection
" Bipolar Technology
" Package Outline SOT -23-5
! PIN CONFIGURA TION
! EQUIVALENT CI RCUIT
V
OUT
Thermal
Protection
Bandgap
Reference Noise
Bypass
V
IN
Control
GND
123
45
123
45
1. CONTROL(Active High
)
2. GND
3. NOISE BYPASS
4. V
OUT
5. V
IN
1. V
IN
2. GND
3. CONTROL (Active High)
4. NOISE BYPASS
5. V
OU
T
NJM2881F
123
45
123
45
NJM2882F
NJM2881/82F
NJM2881/82
- 2 -
Ver.2006-02-22
! OUTPUT VOL TAGE RANK LIST
Device Name V
OUT
Device Name V
OUT
Device Name V
OUT
NJM288*F15 1.5V NJM288*F29 2.9V NJM288*F38 3.8V
NJM288*F17 1.7V NJM288*F03 3.0V NJM288*F04 4.0V
NJM288*F18 1.8V NJM288*F31 3.1V NJM288*F43 4.3V
NJM288*F21 2.1V NJM288*F32 3.2V NJM288*F47 4.7V
NJM288*F25 2.5V NJM288*F33 3.3V NJM288*F05 5.0V
NJM288*F28 2.8V NJM288*F345 3.45V
NJM288*F285 2.85V NJM288*F35 3.5V
! ABSOLUTE MAXIMUM RATINGS (Ta=25°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
V
IN
=+2. 3 ∼ +6V (In case of Vo<2.1V)
! ELECTRICAL CHARA CTERISTICS
(V o>2.0V version: V
IN
=V o+1V, C
IN
=0.1µF, Co=1.0µF: V o≥2.7V (Co=2.2µF: V o≤2.6V), Cp=0.01µF, T a=25°C)
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Output V oltage V o Io=30mA -1.0% - +1.0% V
Quiescent Current I
Q
Io=0mA, except Icont - 120 180
µA
Quiescent Current
at Control OFF I
Q(OFF)
V
CONT
=0V - - 100 nA
Output Current Io Vo-0.3V 300 400 - mA
Line Regulation ∆Vo/∆V
IN
V
IN
=V o+1V ∼ V o+6V , Io=30mA - - 0.10 %/V
Load Regulation ∆Vo/∆Io Io=0 ∼ 300mA - - 0.03 %/mA
Dropout V oltage ∆V
I-O
Io=100mA - 0.10 0.18 V
Ripple Rejection RR ein=200mVrms,f=1kHz,Io=10mA,
Vo=3V version - 75 - dB
Average Temperature
Coefficient of Output
V oltage ∆Vo/∆Ta Ta=0 ∼ 85°C, Io=10mA - ± 50 - ppm/°C
Output Noise V oltage V
NO
f=10Hz ∼ 80kHz, Io=10mA, V o=3V version - 30 -
µVrms
Control V oltage for O N-state V
CONT(ON)
1.6 - - V
Control V oltage for O FF-state V
CONT(OFF)
- - 0.6 V
PARAMETER SYMBOL RATINGS UNIT
Input V oltage V
IN
+14 V
Control V oltage V
CONT
+14(*1) V
350(*2)
Power Dissipation P
D
SOT-23-5
200(*3) mW
Operating Temperature Topr -40 ∼ +85 °C
S torage Temperature Tstg -40 ∼ +125 °C
NJM2881/82
-
3
-
Ver.2006-02-22
! ELECTRICAL CHARA CTERISTICS
(Vo≤2.0V version: V
IN
=V o+1V, C
IN
=0.1µF, Co=2.2µF: V o≥1.9V (Co=4.7µF: V o≤1.8V), Cp=0.01µF, Ta=25°C)
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Output V oltage V o Io=30mA -1.0% - +1.0% V
Quiescent Current I
Q
Io=0mA, except I
CONT
- 120 180
µA
Quiescent Current
at Control OFF I
Q(OFF)
V
CONT
=0V - - 100 nA
Output Current Io V o-0.3V 300 400 - mA
Line Regulation ∆Vo/∆V
IN
V
IN
=V o+1V ∼ V o+6V , Io=30mA - - 0.10 %/V
Load Regulation ∆Vo/∆Io Io=0 ∼ 300mA - - 0.03 %/mA
Ripple Rejection RR ein=200mVrms,f=1kHz,Io=10mA,
Vo=1.8V version - 80 - dB
Average Temperature
Coefficient of Output V oltage ∆Vo/∆Ta Ta=0 ∼ 85°C, Io=10mA - ± 50 - ppm/°C
Output Noise V oltage V
NO
f=10Hz ∼ 80kHz, Io=10mA, V o=1.8V version - 20 -
µVrms
Control V oltage for O N-state V
CONT(ON)
1.6 - - V
Control V oltage for O FF-state V
CONT(OFF)
- - 0.6 V
The above specification is a common specification for all output volt ages.
Therefore, it may be different from the individual specification for a specific output voltage.
! TEST CIRCUIT
NJM2881/82
V
IN
V
IN
V
OUT
CONTROL
GND
0.1µF
I
IN
I
CONT
V
CON
T
Cp=0.01µF
I
OUT
V
OUT
V
V
A
A
1.0µF
*4
(ceramic)
*4 1.9V
≤ Vo ≤ 2.6V version: Co=2.2µF(ceramic)
Vo
≤ 1.8V version: Co=4.7µF(ceramic)
NOISE
BYPASS
NJM2881/82
- 4 -
Ver.2006-02-22
! TYPICAL APPLICATION
1 In the case where ON/OFF Control is not required:
Connect control terminal to V
IN
terminal
2 In use of ON/OFF CONTRO L:
S tate of control terminal:
•“H”→ out put is enabled.
•“L” or “open” → output is disabled.
%Noise byp ass 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.
%In the case of using a resistance "R" between V
IN
and control.
The current flow into the control terminal while the IC is ON state (I
CONT
) can be reduced when a pull up resistance
"R" is inserted between V
IN
and the control terminal.
The minimum control voltage for ON state (V
CONT (ON)
) is increased due to the voltage drop caused by I
CONT
and the
resistance "R". The I
CONT
is temperature dependence as shown in the "Control Current vs. Temperature"
characteristics. Therefore, the resistance "R" should be carefully selected to ensure the control volt age exceeds
the V
CONT (ON)
over the required temperature range.
NJM 2881/82
V
IN
V
OUT
CONTROL NOISE
BYPASS
GND
0.1µF
Cp=0.01µF
V
OUT
V
IN
R
1.0µF
*5
*5 1.9V
≤ Vo ≤ 2.6V ve rsion: Co= 2.2µF
Vo
≤ 1.8 V version: Co=4.7µF
NJM2881/82
V
IN
V
OUT
CONTROL
GND
0.1µF
Cp=0.01µF
V
OUT
V
IN
1.0µF
*5
*5 1.9V
≤ Vo ≤ 2.6V versio n: Co=2.2µF
Vo
≤ 1.8V version: Co=4.7µF
R
(0∼300kΩ) NOISE
BYPASS
NJM2881/82
-
5
-
Ver.2006-02-22
! PO WER DISSIPATION vs. AMBIENT TEMPE RA TURE
NJM2881/82F Power Dissipation
(Topr=-40～+85℃,Tj=125℃,PD=200mW(Ta≦25℃))
0
100
200
300
400
500
-50 -25 0 25 50 75 100
A m bi ent Temperat ure Ta(℃)
P o we r Di ssipatio n P D(mW)
Device itself
On Board(114.3×7 6.2×1.6mm, FR-4 )
NJM2881/82
-
6
-
Ver.2006-02-22
! ELECTRICAL CHA RACTERISTICS
2.6
2.8
3
3.2
3.4
2.6 2.8 3 3.2 3.4
Inp ut Voltage :Vin [V]
@:Ta=25
o
C
Co=1.0µF(Ceramic)
Cp=0.01µF
Output Voltage :Vo [V]
NJM2881/82_3.0V
Out pu t Volt age v.s. Inpu t Voltag e
Io=0A
Io=100mA
Io=300mA
0
0.5
1
1.5
2
2.5
3
3.5
0 100 200 300 400 500 600
NJM2881/82_3.0V
Output Voltage vs. Output Current
Output Voltage :Vo [V]
Output Curr ent :Io [mA]
@:Ta=25
o
C
Co=1.0µF(Ceramic)
Cp= 0. 0 1µF
0
5
10
15
20
0 100 200 300 400 500
Ground Pin Current :I
GND
[mA]
Output Current :Io [mA]
NJM2881/82_3.0V
Gr ound Pin Current vs. Output Voltage
@:Ta=25
o
C
Co=1.0µF(Ceramic)
Cp=0.01µF
0
0.05
0.1
0.15
0.2
0.25
0.3
0 100 200 300 400 500
Outp u t Current :I o [mA]
@:Ta=25
o
C
Co=1.0µF(Ceramic)
Cp=0.01µF
D rop out Volt age :d Vi -o [V]
NJM2881/82_3.0V
Drop ou t Volta ge vs. Output Current
0
5
10
15
20
0 0.5 1 1.5 2 2.5 3
C ontrol Vo ltage :V
CONT
[V ]
@:Ta=25
o
C
Co=1.0µF(Ceramic)
Cp=0.01µF
Io=30mA
Control Cur rent :I
CONT
[ µ
µ
µ
µA]
NJM2881/82_3.0V
Co ntrol Current v.s. Contr ol Voltage
Rc=0Ω
Rc=50kΩRc=100kΩ
0
0.5
1
1.5
2
2.5
3
3.5
4
00.511.522.53
Control Voltage :V
CONT
[V]
@:Ta=25
o
C
Vin=4.0V
Co=1.0µF(Ceramic)
Cp=0.01µF
Io=30mA
Output Voltage :Vo [V]
NJM2881/82_3.0V
Output Voltage v.s. Contr ol Voltage
Rc=0Ω
Rc=50kΩ
Rc=100kΩ
NJM2881/82
-7-
Ver.2006-02-22
! ELECTRICAL CHA RACTERISTICS
-60
-50
-40
-30
-20
-10
0
0 100 200 300 400 500
Load Regulation :dVo/dIo [mV ]
Output Current :Io [mA]
NJM2881/82_3.0V
Load Regulation vs. Output Current
@:Ta=25
o
C
VIN=4 V
Co=1.0µF(Ceramic)
Cp= 0.01µF
0
200
400
600
800
1000
4 6 8 101214
Peak Output Current :Io
MAX
[mA]
Input Voltage : Vin [V]
NJM2881/82_3.0V
Peak Output Current vs. Input Voltage
@:Ta=25
o
C
Co=1.0µF(Ceramic)
Cp=0.01µF
0
400
800
1200
1600
2000
051015
Qui esc ent Cur rent : Iq [ µ
µ
µ
µA]
NJM2881/82_3.0V
Quiescent Current v.s. Input Voltage
@:Ta=25
o
C
Output is open.
C o=1 .0µF(Ceramic)
Cp=0.01 µF
includi ng Ic ont
Input Voltage :Vin [V]
0
50
100
150
200
0.000001 0.00001 0.0001 0.001 0.01 0.1
Noise Bypass Capacitor : Cp(
µ
µµ
µ
F)
Output Noise Voltage : Vn ( µ
µ
µ
µVrms)
NJM2881/82_3.0V
Output Noise Voltage vs. Noise Bypas s Capacitor
@:Ta=25
o
C
V
IN
=4V
Co=1.0µF
(Ceramic)
Io= 10mA
0
20
40
60
80
100
0.001 0.01 0.1 1 10 100
Outp u t Cu rr ent :Io [mA]
Output Noise Voltage :Vn [ µ
µ
µ
µVrms]
NJM2881/82_3.0V
Ou tput Noise V o ltag e vs . Out put Cur r e nt
@:Ta=25
o
C
V
IN
=4V
Co=1.0µF(Ceramic)
Cp=0.01µF
0
20
40
60
80
100
10 100 1000 10
4
10
5
Ripp le Re jection Ratio :RR [dB]
NJM2881/82_3.0V
Ripple Rejection Ra tio v.s. Frequency
Frequenc y :f [Hz]
Io=0mA
Io=10mA
Io=30mA
@:Ta=25
o
C
V
IN
=4.0V
ein=200mVrms
Co=1.0µF(Ceramic)
Cp=0.01µF
100k
10k 1k
10010
NJM2881/82
-
8
-
Ver.2006-02-22
! ELECTRICAL CHA RACTERISTICS
0
20
40
60
80
100
0.001 0.01 0.1 1 10 100 1000
Outpu t Current : Io(m A )
Rippl e Rejection : RR (d B)
NJM2881/82_3.0V
Ripple Rejection vs. Ou tput Current
f=1kHz
f=10kHz
@:Ta=25
o
C
VIN=4 .0V
ein=200mVrms
Co=1.0µF(Ceramic)
Cp=0.01µF
0.1
1
10
100
0.001 0.01 0.1 1 10 100 1000
Outpu t Current :Io [mA]
@:Ta=25
o
C
V
IN
=4V
Co=1.0µF(Ceramic)
Cp=0.01µF
Equ iv alent Seri es Re sistanc e : ESR [ Ω
Ω
Ω
Ω]
NJM2881/82_3.0V
Equivalent Series Resistance vs. Output Current
STAB LE REGION
0.02
0
0.05
0.1
0.15
0.2
0.25
0.3
-50 0 50 100 150
ƒf[ƒ^ 1
NJM2881/82_3.0V
Dropout Voltage v.s. Temperature
Dropout Vol t age : Vi -o [V]
Te mperat ure :Ta [
o
C]
@:Io=100mA
Co =1.0 µF(Ceramic)
Cp=0 .01µF
2.9
2.95
3
3.05
3.1
-50 0 50 100 150
Output Voltage :Vo [V]
NJM2881/82_3.0V
Outp ut Voltage v.s. Temperature
@:V
IN
=4V
Io=30mA
Co=1.0µF(Ceramic)
Cp=0.01µF
Temperatu re :Ta [
o
C]
0
0.5
1
1.5
2
-50 0 50 100 150
Con trol V ol tag e :V c ont-off [V]
NJM2881/82_3.0V
Co nt rol Volt age v .s. Temp erat u re
@:V
IN
=4V
Ou tp ut is ope n.
Co=1.0µF(Ceramic)
Cp=0.01µF
Temperature :Ta [
o
C]
0
2
4
6
8
10
-50 0 50 100 150
Control Current : I
CONT
(
µ
µ
µ
µ
A)
Temp erature Ta (
o
C)
NJM2881/82_3.0V
Control Cu rr ent v. s. Temp e r a ture
@:V
IN
=4V
Outpu t is open .
Co=1.0µF(Ceramic)
Cp=0.01µF
V
CONT
=1.6V
NJM2881/82
-
9
-
Ver.2006-02-22
! ELECTRICAL CHA RACTERISTICS
0
50
100
150
200
250
300
-50 0 50 100 150
Quie sce nt Current : Iq [
µ
µ
µ
µ
A]
NJM2881/82_3.0V
Qu ie scen t Current v .s. T e mperatur e
@:V
IN
=4V
Output is open
Co=1.0µF(Ceramic)
Cp=0.01µF
In clude Icont
Temperatu re :Ta [
o
C]
0
50
100
150
200
-50 0 50 100 150
Short Circuit Current :Isc [mA]
NJM2881/82_3.0V
Short Circ uit Current v.s. Temperature
@:V
IN
=4.0V
Outp ut is sh ort to grou nd .
Co=1.0µF(Ceramic)
Cp=0.01 µF
Temperatu re :Ta [
o
C]
-0.2
-0.1
0
0.1
0.2
-50 0 50 100 150
Line Regulation :dVo/dVin [%/V]
NJM2881/82_3.0V
Line Regulation v.s. Temp erature
@:V
IN
=4.0-9.0V
Io =30mA
C o=1 .0µF(Ceramic)
Cp=0.01 µF
Temperatu re :Ta [
o
C]
0
0.005
0.01
0.015
0.02
0.025
0.03
-50 0 50 100 150
Load Regulation :dVo/dIo [%/mA]
NJM2881/82_3.0V
Load Regulation v.s. Temperature
@:V
IN
=4.0V
Io =0-100mA
C o=1 .0µF(Ceramic)
Cp=0.01 µF
Temperatu re :T a [
o
C]
0
0.5
1
1.5
2
2.5
3
3.5
-50 0 50 100 150 200
Output Voltage :Vo [V]
NJM2881/82_3.0V
Output Vo ltage v.s. T emperature
@:V
IN
=4.0V
Io=30mA
Co=1.0µF(Ceramic)
Cp=0.01µF
Temperatu re :Ta [
o
C]
NJM2881/82
- 1
0
-
Ver.2006-02-22
! ELECTRICAL CHA RACTERISTICS
0
2
4
6
8
10
12
-20
-15
-10
-5
0
5
10
15
20
012345
NJM2881_3.0V
ON/OFF Transient Response without Load
Output Voltage : Vo [V]
Control Voltage : Vo [V]
Time : t [S ]
C ont rol Voltag e
Outp ut Vo ltage
@:Ta=25
o
C
V
DD
=4.0V
Co=1.0µF(Ceramic)
Cp=0.01µF
Io =0 mA
0
2
4
6
8
10
12
-20
-15
-10
-5
0
5
10
15
20
0 4 8 121620
NJM2881_3.0V
ON/OFF Transient Response
Output Voltage : Vo [V]
Control Voltage : Vo [V]
Time : t [ mS]
Control Voltage
Output Voltage
@:Ta=25
o
C
V
DD
=4.0V
Co=1.0µF(Ceramic)
Cp=0.01µF
Io=30mA
2.96
2.98
3
3.02
3.04
3.06
3.08
3.1
3.12
0
50
100
150
200
250
300
350
400
0 40 80 120 160 200
NJM2881/82_3.0V
Load Transient Response
Output Voltage : Vo [V]
Time : t [
µ
µµ
µ
S]
Out p ut Cu r re nt
Output Voltage
@:Ta=25
o
C
V
DD
=4.0V
Co=1.0µF(Ceramic)
Cp=0.01µF
Output Current : Io [mA]
2.96
2.98
3
3.02
3.04
3.06
3.08
3.1
3.12
-4
-2
0
2
4
6
8
10
0 40 80 120 160 200
NJM2881/82_3.0V
Input Transient Response
Ou tput Volta ge : Vo [V ]
Time : t [
µ
µµ
µ
S]
Input Vo ltage
Outp ut Voltage
@:Ta=25
o
C
V
DD
=4.0V
Co=1.0µF(Ceramic)
Cp=0.01µF
Io=30mA
Input Voltage : V
IN
[V]
[CAU TION ]
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.
