Designated client product
This product will be discontinued its production in the near term.
And it is provided for customers currently in use only, with a time limit.
It can not be available for your new project. Please select other new or
existing products.
For more information, please contact our sales office in your region.
New Japan Radio Co.,Ltd.
http://www.njr.com/
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 input 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
NJM2800U/U1
FEATURES
Output Voltage Accuracy Vo
= ±1.0%
Reset Voltage Accuracy V
RT
= ±1.0%
Adjust reset delay time with external capacitor.
Ripple Rejection
60dB typ. (f=1kHz)
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
1.V
IN
2.GND
3.V
OR
4.C
d
1 2 3
5.V
OUT
NJU2800F
4
5
1
1.V
OUT
2.GND
3.C
d
4.V
OR
5.V
IN
2 3
NJU2800U/U1
2
4
OUTPUT VOLTAGE/ DETECTION VOLTAGE
Device Name
Output Voltage
Detection Voltage
NJM2800U1-/U/F1803
1.8V
3.0V
NJM2800U1-/F2528
2.5V
2.8V
NJM2800U1-/U/F3342
3.3V
4.2V
EQUIVALENT CIRCUIT
V
IN
Thermal
Protection
Bandgap
Reference
V
OUT
V
OR
GND
Cd
NJM2800
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Power Dissipation
Operating Temperature
Storage Temperature
P
D
Topr
Tstg
(Ta=25°C)
RATINGS
UNIT
+14
V
350(*1)
SOT-23-5
mW
200(*2)
SOT89-5 350(*2)
−
40∼+85
−
40∼+125
°C
°C
(*1): Mounted on glass epoxy board based on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers)
(*2): Device itself.
Operating voltage
V
IN
=+2.3
∼
+14V (In case of Vo<2.1V version)
ELECTRICAL CHARACTERISTICS
(V
IN
=Vo+1V, C
IN
=0.1µF, Co=1µF
(1.8<Vo≤2.6V: Co=2.2
µ
F, Vo≤1.8V: Co=4.7
µ
F)
,Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
250
350
V
IN
=Vo+2V, Io=0mA
Quiescent Current
I
Q
µA
−
Regulator Block
Output Voltage
Io=30mA
+1.0%
V
−1.0%
−
Vo
Output Current
Vo-0.3V
150
200
mA
−
Io
Line Regulation
0.10 %/V
−
−
∆Vo/∆V
IN
V
IN
=Vo+1V∼Vo+6V, Io=30mA
Load Regulation
0.03 %/mA
−
−
∆Vo/∆Io
Io=0∼100mA
0.10 0.18
V
Dropout Voltage(*3)
−
∆V
I_O
Io=60mA
Ripple Rejection
ein=200mVrms,f=1kHz,Io=10mA,
RR
60
dB
−
−
Vo=3V Version
Output Voltage
Ta=0∼85°C, Io=10mA
±50
−
−
ppm/°C
∆Vo/∆T
Temperature Coefficient
Output Noise Voltage
Reset Block
Voltage Detection
Hysteresis Voltage
Low Level Output
Output Leak Current
On time Output Current
Reset Output Delay
Operation Voltage Limit
V
NO
V
RT
V
RTH
R
ORL
I
ORH
I
ORL
t
d
V
OPL
f=10Hz∼100kHz, Io=10mA,
Vo=3V Version
V
IN
=H→L
V
IN
=H→L→H
−
45
−
µVrms
+1.0%
−1.0%
−
V
RT
×3
V
RT
×5
V
RT
×8
%
%
%
100
300
V
IN
=V
RT
-0.5V, R
L
=100kΩ
−
V
IN
= V
RT
+0.5V
0.1
−
−
5
V
IN
=V
RT
-0.5V, R
L
=0Ω
−
−
9
10
11
V
IN
=(V
RT
-0.5V)→ (V
RT
+0.5V), C
d
=0.1µF
0.9
V
ORL
=0.4V
−
−
V
V
mV
µA
mA
ms
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.
NJM2800
TIMING CHART
V
IN
[V]
V
RTH
V
RT
V
O
t
V
O
[V]
V
O
t
V
OR
[V]
td
td
td
t
∗
V
OR
is the case where a pull-up is carried out to V
IN
through resistance.
NJM2800
TEST CIRCUIT
I
Q
V
IN
V
O
I
OR
NJM2800
0.1µF
V
IN
R
L
C
d
GND
V
OR
V
1.0µF*4
V
0.1µF
I
OUT
(Ceramic)
V
OUT
V
OR
*4 1.8V<Vo≤2.6V: Co=2.2µF (Ceramic)
Vo≤1.8V: Co=4.7µF (Ceramic)
TYPICAL APPLICATIONS
V
IN
V
IN
V
O
V
OUT
NJM2800
0.1µF
100kΩ
1.0µF*5
V
OR
C
d
GND
0.1µF
V
OR
*5 1.8V<Vo≤2.6V: Co=2.2µF
Vo≤1.8V: Co=4.7µF
POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJM2800F Power Dissipation
(Topr=-40½+85℃,Tj=125℃)
500
Power Dissipation P
D
(mW)
400
On Board(114.3×76.2×1.6mm, FR-4)
300
Device itself
200
100
0
-50
-25
0
25
50
75
100
Ambient Temperature Ta(℃)
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