NJM2801
PRELIMINARY
Low Dropout Voltage Regulator with Reset
GENERAL DISCRIPTION
PACKAGE OUTLINE
The NJM2801 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 2% accuracy.
It is suitable for local power supply and reset for small
micro controller and other logic chips.
FEATURES
Output Voltage Accuracy
Vo
=
2.2
%
Reset Output Voltage
V
ORH
=
3.3V(typ.)
Reset Hold Time
td
=
10mS
2.5mS
Ripple Rejection
RR=60dB (typ.)
Quiescent Current
I
Q
=
300
A(max.)
Open Collector Output
Bipolar Technology
Output Voltage Monitor type
Package Outline
SOT89(5Pin)/MTP5
Protection Circuit
1.Current limit circuit
2.Thermal overload protection circuit
Output Voltage/Reset Validated Voltage
PART NO
Output Voltage
Reset Validated
Voltage
NJM2801-0543
5.0V 4.3V
Block Diaglam
NJM2801F** NJM2801U**
PIN CONFIGURATION
1.V
OUT
2.GND
3.Cd
4.V
OR
5.V
IN
5 4
1 2 3
1 5
2
3 4
1.V
IN
2.GND
3.V
OR
4.C
d
5.V
OUT
( MTP-5 )
( SOT-89 )
V
O
GND
V
IN
Thermal
Protection
Bandgap
Reference
Cd
V
OR
NJM2801
PRELIMINARY
Absolute Maximum Ratings
(Ta=25
C)
PARAMETER SYMBOL
RATINGS
UNIT
Input Voltage
V
IN
+14 V
200 (MTP5)
Power Dissipation
P
D
350 (SOT-89)
mW
Operating Temperature Topr
-
40
+85
C
Storage Temperature Range
Tstg
-
40
+125
C
ELECTRICAL CHARACTERISTICS (V
IN
=Vo+1V , C
IN
=0.1
F, Co=1
F
(
Vo2.6V: Co=2.2
F
)
Ta=25
C )
PARAMETER SYMBOL
CONDITION
MIN.
TYP.
MAX.
UNIT
Quiescent Current
I
Q
Io=0mA
-
200 300
A
Regulator Block
Output Voltage
Vo
Io=30mA
-2.2%
-
+2.2% V
Output Current
Io
Vo-0.3V
150 200
-
mA
Line Regulation
Vo/V
IN
V
IN
=Vo+1V
Vo+6V, Io=30mA
-
-
0.10
%/V
Load Regulation
Vo/Io
Io=0
100mA
-
-
0.03
%/mA
Dropout Voltage
V
I_O
Io=60mA
-
0.10 0.18
V
Ripple Rejection
RR
Ein=200mVrms, f=1kHz, Io=10mA,Vo=3V
-
60
-
dB
Output Voltage
Temperature Coefficient
Vo/T
Ta=0
85
C
, Io=10mA
-
50
-
ppm/
C
Output Noise Voltage
V
NO
f=10Hz
100kHz, Io=10mA, Vo=3V
-
45
-
Vrms
Reset Block
Voltage Detection
V
RT
V
IN
=H
L
-
2%
-
+2% V
Hysteresis Voltage
V
RTH
V
IN
=H
L
H
VRT
3% VRT
5% VRT
8%
mV
Low Level Output R
ORL
V
IN
=V
RT
-0.5V, R
L
=100k
-
100 300
mV
Output Leak Current
I
ORH
V
IN
= V
RT
-0.5V
-
-
0.1
A
On time Output Current
I
ORL
V
IN
=V
RT
-0.5V, R
L
=0
5
-
-
mA
Reset Output Delay
t
d
V
IN
=(V
RT
-0.5V)
(V
RT
+0.5V), C
d
=0.1
F
9
10
11 mS
Operation Voltage Limit
V
OPL
V
ORL
=0.4V
-
0.9
-
V
The above specification is a common specification for all output voltages.
Therefore, it may be different from individual specification for a specific output voltage.
NJM2801
PRELIMINARY
TEST CIRCUIT
TYPICAL APPLICATIONS
NJM2801
V
IN
V
O
Cd V
OR
GND
V
OUT
I
OUT
V
R
L
1.0
F
V
0.1
F
0.1
F
V
IN
I
Q
V
OR
I
OR
NJM2801
V
IN
V
O
Cd V
OR
GND
V
OUT
100k
1.0
F
0.1
F
0.1
F
V
IN
V
OR
The specifications on this data book are only given for
information, without any guarantee as regards either
mistakes or omissions. The application circuit in this data
book 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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