NJM2800
Low Dropout Voltage Regulator with Reset
! GENERAL DISCRIPTION
The NJM2800 is a low dropout voltage regulator with
reset function.
It provides up to 150mA of logic supply, and the reset
function monitors either input or output voltage of the
regulator with 1% accuracy.
It is suitable for local power supply and reset for small
micro controller and other logic chips.
! PACKAGE OUTLINE
NJM2800F
! FEATURES
" Output Voltage Accuracy Vo = ±1.0%
" Reset Voltage Accuracy Vreset = ±1.0%
" Reset Hold Time
td = 10mS±1.0mS
" Ripple Rejection
60dB typ. (f=1kHz)
" Quiescent Current
IQ=250µA (typ.)
" Input Voltage Monitor type
" Open Collector Output
" Internal Short Circuit Current Limit
" Internal Thermal Overload Protection
" Bipolar Technology
" Package Outline
SOT89-5 (NJM2800U/U1), SOT-23-5(NJU2800F)
! PIN CONFIGURATION
5
4
1 2 3
1.VIN
2.GND
3.VOR
4.Cd
5.VOUT
NJU2800F
5
1
2
4
2
3
1.VO
2.GND
3.Cd
4.VOR
5.VIN
NJU2800U/U1
! OUTPUT VOLTAGE/ DETECTION VOLTAGE
Device Name
Output Voltage
Detection Voltage
NJM2800F/U1803
1.8V
3.0V
NJM2800F/U1-2528
2.5V
2.8V
NJM2800U3342
3.3V
4.2V
NJM2800U/U1
NJM2800
! EQUIVALENT CIRCUIT
VO
VIN
Thermal
Protection
VOR
Bandgap
Reference
GND
Cd
! ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
VIN
Power Dissipation
200 (SOT-23-5)
PD
Operating Temperature
Storage Temperature
(Ta=25°C)
RATINGS
UNIT
+14
V
Topr
Tstg
350 (SOT-89-5)
−40∼+85
−40∼+125
mW
°C
°C
! ELECTRICAL CHARACTERISTICS (VIN=Vo+1V, CIN=0.1µF, Co=1µF (Vo≤2.6V: Co=2.2µF) Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
−
250
350
µA
Io=30mA
−1.0%
−
+1.0%
V
Vo-0.3V
150
200
−
mA
IQ
VIN=Vo+2V, Io=0mA
Output Voltage
Vo
Output Current
Io
Line Regulation
∆Vo/∆VIN
VIN=Vo+1V∼Vo+6V, Io=30mA
−
−
0.10
%/V
Load Regulation
∆Vo/∆Io
Io=0∼100mA
−
−
0.03
%/mA
Dropout Voltage
∆VI_O
Io=60mA
−
0.10
0.18
V
Ripple Rejection
RR
Quiescent Current
Regulator Block
ein=200mVrms, f=1kHz, Io=10mA,Vo=3V
−
60
−
dB
Ta=0∼85°C, Io=10mA
−
±50
−
ppm/°C
VNO
f=10Hz∼100kHz, Io=10mA, Vo=3V
−
45
−
µVrms
VRT
VIN=H→L
−1.0%
−
+1.0%
V
Hysteresis Voltage
VRTH
VIN=H→L→H
Low Level Output Voltage
RORL
VIN=VRT-0.5V, RL=100kΩ
Output Leak Current
IORH
VIN= VRT+0.5V
On time Output Current
IORL
VIN=VRT-0.5V, RL=0Ω
5
−
−
mA
VIN=(VRT-0.5V)→ (VRT+0.5V), Cd=0.1µF
9
10
11
mS
VORL=0.4V
−
0.9
−
V
Output Voltage Temperature
Coefficient
Output Noise Voltage
∆Vo/∆T
Reset Block
Voltage Detection
Reset Output Delay Time
Operation Voltage Limit
td
VOPL
VRT×3% VRT×5% VRT×8%
mV
−
100
300
mV
−
−
0.1
µA
(note 1) 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.
NJM2800
! TIMING CHART
VIN [V]
VRTH
VRT
VO
t
VO [V]
VO
t
VOR [V]
td
td
td
t
∗ VOR is the case where a pull-up is carried out to VIN through resistance.
NJM2800
! TEST CIRCUIT
IQ
VIN
VO
IOR
NJM2800
RL
0.1µF
Cd
VIN
V
VOR
1.0µF
GND
V
0.1µF
IOUT
VOR
! TYPICAL APPLICATIONS
VIN
VIN
VOUT
VO
NJM2800
100kΩ
1.0µF
0.1µF
Cd
VOR
GND
0.1µF
VOR
VOUT
NJM2800
! ELECTRICAL CHARACTERISTICS
NJM2800_3.3V
Output Voltage vs. Input Voltage
3.5
@:Ta=25oC
Co=1µF(Ceramic)
Cd=0.1µF
3.5
3.4
3
Io=0A
Ou tpu t Voltage :Vo [V]
Vo(V
(V
(V))
Output Vo ltage : Vo
NJM2800_Vo=3.3V
Outpu t Voltage vs. Outpu t Current
4
3.3
3.2
Io=30mA
3.1
2.5
2
1.5
1
o
Io=100mA
3
3
3.1
3.2
3.3
3.4
@:Ta=25 C
V IN=4.3V
Co=1.0µF(Ceramic)
0.5
3.5
3.6
0
3.7
0
50
NJM2800_3.3V
Ground Pi n Current v.s. Output Current
20
200
250
300
o
o
@:Ta=25 C
Co=1µF(Ceramic)
Cd=0.1µF
0.25
15
Dropout Voltage:dV I-O ( V)
Ground Pi n Current : IGND (mA)
150
NJM2800_3.3V
Dropout Voltage vs. Output Current
0.3
@:Ta=25 C
VIN=4.3V
Co=1.0µF(Ceramic)
Cd=0.1µF
10
5
0.2
0.15
0.1
0.05
0
0
0
50
100
150
200
0
50
Output Current : IO(mA)
300
150
200
-20
-30
-40
NJM2800_3.3V
Peak Output Current vs. Input Voltage
250
Peak Output Current : IoMAX (mA)
@:Ta=25oC
VIN=4.3V
Co=1µF(Ceramic)
Cd=0.1µF
-10
100
Output Current:Io(mA)
NJM2800_3.3V
Load Regulati on vs. Output Current
0
dVo/dIo(m
(m
(mV)
V)
Load Regulati on : dVo/dIo
100
Outpu t Current :Io [mA]
Input Voltage : V IN (V)
200
150
100
50
@:Ta=25oC
Co=1µF(Ceramic)
Cp=0.01µF
0
-50
0
50
100
150
Output Current : Io(mA)
200
6
8
10
Input Voltage : VIN(V)
12
14
NJM2800
! ELECTRICAL CHARACTERISTICS
NJM2800_3.3V
Qui escent Current v.s. Input Voltage1
2000
NJM2800_3.3V
Outpu t Noi se Vol tage vs. Output Current
100
o
@:Ta=25 C
VIN=4.3V
Cd=0.1µF
LPF:100kHz
Output Noise Voltage : Vn( µ Vrms)
Quiescent Current : IQ (µA)
@:Ta=25oC
Output is open.
Co=1.0µF(Ceramic)
1500
1000
500
5
10
Co=1.0µF(Ceramic)
60
40
Co=2.2µF(Ceramic)
20
0
0.001
0
0
80
15
0.01
Input Vol tage : VIN(V)
100
100
90
90
Ripple Rejecti on Ratio : RR (dB)
Ri pple Rejecti on Ratio : RR (dB)
NJM2800_3.3V
Ripple Rejection Ratio v.s. Frequency
80
Io=0mA
Io=10mA
70
60
Io=30mA
50
40
@:Ta=25 oC
VIN=4.3V
ein=200mVrms
Co=1µF (Ceramic)
Cd=0.1µF
30
20
10
10k
100k
Frequency : f (Hz)
Equi valent Serise Resistance : ESR( Ω)
100
@:Ta=25oC
V IN=4.3V
Co=1.0µF(Ceramic)
10
STABLE REGION
0.1
0.02
1µ
10µ
100µ
1m
Output Current : Io(mA)
10
100
NJM2800_3.3V
Ri pple Rejecti on Rati o v.s. Outpu t Current
70
f=1kHz
60
f=10kHz
50
40
@:Ta=25oC
Co=1.0µF(Ceramic)
Cd=0.1µF
V IN=4.3V
ein=200mVrms
20
0.001
0.01
0.1
1
Output Current : Io (mA)
NJM2800_3.3V
Equival en t Seri se Resistance vs. Output Current
1
1
80
30
1k
100
0.1
Output Current : Io(mA)
10m
100m
10
100
NJM2800
! ELECTRICAL CHARACTERISTICS
NJM2800_3.3V
Dropout Voltage v.s. Temperature
0.3
NJM2800_Vo= 3.3V
Output Voltage vs. Temperature
3.4
VIN=4.3V
Io=30mA
Co=1µF
@:V IN=4.3V
Io=60mA
Co=1µF(Ceramic)
0.25
Outpu t Voltage :Vo [V]
Dropout Voltage:dV I-O ( V)
3.35
0.2
0.15
0.1
3.3
3.25
0.05
0
3.2
-50
0
50
100
o
-50
150
0
50
NJM2800_3.3V
Quiescent Current v.s. Temperature
0.1
@:dVIN=4.3-9.3V
Io=30mA
Co=1.0µF(Ceramic)
200
150
100
@:V IN=5.3V
Output is open.
Co=1µF(Ceramic)
50
Line Regulation : dVo/dIo (%/V)
250
Quiescent Current : IQ (µA)
150
NJM2800_3.3V
Line Regulation v.s. Temperatu re
300
0.05
0
-0.05
0
-50
0
50
o
100
-0.1
-50
150
0
Temperature : Ta ( C)
@:V IN=4.3V
Output is short to ground.
Co=1µF(Ceramic)
Sh ort Ci rcui t Current : IS C (mA)
0.015
0.01
0.005
0
50
o
Temperature : Ta (o C)
150
100
@:VIN=4.3V
Io=0-100mA
Co=1.0µF(Ceramic)
0.02
0
-50
100
o
NJM2800_3.3V
Short Ci rcuit Current v.s. Temperature
0.03
0.025
50
Temperature : Ta ( C)
NJM2800_3.3V
Load Regulation v.s. Temperature
Load Regulati on : dVo/dIo (%/mA)
100
o
Temperature : Ta[ o C]
Temperature : Ta ( C)
100
150
80
60
40
20
0
-50
0
50
o
Temperature : Ta ( C)
100
150
NJM2800
[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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