NJM2800
PRELIMINARY
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 2% accuracy.
It is suitable for local power supply and reset for small
micro controller and other logic chips.
■
PACKAGE OUTLINE
NJM2800F**
NJM2800U**
■
PIN CONFIGURATION
■
FEATURES
•
Output Voltage Accuracy
•
Reset Voltage Accuracy
•
Reset Hold Time
•
Quiescent Current
•
Open Collector Output
•
Bipolar Technology
•
Input Voltage Monitor type
•
Package Outline
•
Protection Circuit
Vo
= ±2.2%
Vreset
= ±2.0%
td
=
10mS±2.5mS
I
Q
=300µA
(max.)
( MTP-5 )
1
2
3
4
5
1.V
IN
2.GND
3.V
OR
4.C
d
5.V
OUT
SOT89 (5Pin) / MTP5
1.Current
limit circuit
2.Thermal overload protection circuit
( SOT-89 )
5
4
■
OUTPUT VOLTAGE/RESET VALIDATED VOLTAGE
PART NO
NJM2800-2528
NJM2800-3342
Output Voltage
2.5V
3.3V
Reset Validated
Voltage
2.8V
4.2V
1
2
3
1.V
OUT
2.GND
3.Cd
4.V
OR
5.V
IN
■
BLOCK DIAGLAM
V
IN
Thermal
Protection
V
O
V
OR
Bandgap
Reference
GND
Cd
NJM2800
PRELIMINARY
■
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Input Voltage
Power Dissipation
Operating
Storage
Temperature
Temperature
SYMBOL
V
IN
P
D
Topr
Tstg
RATINGS
+14
200 (MTP5)
350 (SOT-89)
−
40∼+85
−
40∼+125
(Ta=25°C)
°
UNIT
V
mW
°C
°C
■
ELECTRICAL CHARACTERISTICS (V
IN
=Vo+1V , C
IN
=0.1µF, Co=1µF
(
Vo≤2.6V: Co=2.2µF
)
Ta=25°C )
µ
µ
µ
°
PARAMETER
Quiescent Current
Regulator Block
Output Voltage
Output Current
Line Regulation
Load Regulation
Dropout Voltage
Ripple Rejection
Output
Voltage
Temperature Coefficient
SYMBOL
I
Q
Vo
Io
∆Vo/∆V
IN
∆Vo/∆Io
∆V
I_O
RR
∆Vo/∆T
V
NO
V
RT
V
RTH
R
ORL
I
ORH
I
ORL
t
d
V
OPL
Io=0mA
Io=30mA
Vo-0.3V
CONDITION
MIN.
−
−2.2%
150
−
−
−
−
−
−
−2%
TYP.
250
−
200
−
−
0.10
60
±50
45
−
MAX.
350
+2.2%
−
0.10
0.03
0.18
−
−
−
+2%
UNIT
µ
A
V
mA
%/V
%/mA
V
dB
ppm/
°C
V
IN
=Vo+1V
∼
Vo+6V, Io=30mA
Io=0
∼
100mA
Io=60mA
Ein=200mVrms, f=1kHz, Io=10mA,Vo=3V
Ta=0
∼
85
°C
, Io=10mA
f=10Hz
∼
100kHz,
Io=10mA, Vo=3V
V
IN
=H→L
V
IN
=H→L→H
V
IN
=V
RT
-0.5V, R
L
=100kΩ
V
IN
= V
RT
-0.5V
V
IN
=V
RT
-0.5V, R
L
=0Ω
V
IN
=(V
RT
-0.5V)→ (V
RT
+0.5V), C
d
=0.1µF
V
ORL
=0.4V
Output Noise Voltage
Reset Block
Voltage Detection
Hysteresis Voltage
Low
Level
Output
Output Leak Current
On time Output Current
Reset Output Delay
Ti
Operation Voltage Limit
µ
Vrms
V
mV
mV
VRT×3 VRT×5 VRT×8
100
300
−
0.1
−
−
5
−
−
9
10
11
−
0.9
−
µ
A
mA
mS
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.
NJM2800
PRELIMINARY
■
TIMING CHART
V
IN
V
RTH
V
RT
V
O
t
V
O
V
O
t
V
OR
t
d
t
d
t
d
∗
V
OR
is the case where a pull-up is carried out to V
IN
through resistance.
t
NJM2800
PRELIMINARY
■
TEST CIRCUIT
I
Q
V
IN
V
O
I
OR
NJM2800
0.1µF
V
IN
R
L
Cd
GND
V
OR
1.0µF
I
OUT
V
V
OUT
V
0.1µF
V
OR
■
TYPICAL APPLICATIONS
V
IN
V
IN
V
O
V
OUT
NJM2800
0.1µF
100kΩ
1.0µF
V
OR
Cd
GND
0.1µF
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.
This datasheet has been download from:
www.datasheetcatalog.com
Datasheets for electronics components.
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