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
NJM2800U/U1
!
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
I
Q
=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.V
IN
2.GND
3.V
OR
4.C
d
5.V
OUT
5
2
4
1
2
3
1.V
O
2.GND
3.C
d
4.V
OR
5.V
IN
NJU2800F
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
NJM2800
!
EQUIVALENT CIRCUIT
V
IN
Thermal
Protection
Bandgap
Reference
V
O
V
OR
GND
Cd
!
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
200
(SOT-23-5)
350
(SOT-89-5)
−
40∼+85
−
40∼+125
mW
°C
°C
!
ELECTRICAL CHARACTERISTICS (V
IN
=Vo+1V, C
IN
=0.1µF, Co=1µF
(Vo≤2.6V:
Co=2.2µF) Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
Quiescent Current
Regulator Block
Output Voltage
Output Current
Line Regulation
Load Regulation
Dropout Voltage
Ripple Rejection
Output Voltage Temperature
Coefficient
Output Noise Voltage
Reset Block
Voltage Detection
Hysteresis Voltage
Low Level Output Voltage
Output Leak Current
On time Output Current
Reset Output Delay Time
Operation Voltage Limit
V
RT
V
RTH
R
ORL
I
ORH
I
ORL
t
d
V
OPL
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
−1.0%
−
−
5
9
−
−
100
−
−
10
0.9
+1.0%
V
mV
mV
µA
mA
mS
V
V
RT
×3%
V
RT
×5%
V
RT
×8%
300
0.1
−
11
−
Vo
Io
∆Vo/∆V
IN
∆Vo/∆Io
∆V
I_O
RR
∆Vo/∆T
V
NO
Io=30mA
Vo-0.3V
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
−1.0%
150
−
−
−
−
−
−
−
200
−
−
0.10
60
±50
45
+1.0%
−
0.10
0.03
0.18
−
−
−
V
mA
%/V
%/mA
V
dB
ppm/°C
µVrms
I
Q
V
IN
=Vo+2V, Io=0mA
−
250
350
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
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
I
OUT
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
C
d
GND
0.1µF
V
OR
NJM2800
!
ELECTRICAL CHARACTERISTICS
NJM2800_3.3V
Output Voltage vs. Input Voltage
@:Ta=25
o
C
Co=1µF
(Ceramic)
Cd=0.1µF
3.4
4
3.5
3
3.3
3.5
NJM2800_Vo=3.3V
Outpu t Voltage vs. Outpu t Current
Output Vo ltage : Vo(V )
Vo(V
(V)
Ou tpu t Voltage :Vo [V]
Io=0A
2.5
2
3.2
Io=30mA
1.5
1
0.5
0
0
50
100
150
200
250
300
@:Ta=25 C
V
IN
=4.3V
Co=1.0µF(Ceramic)
o
3.1
Io=100mA
3
3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
Input Voltage : V
IN
(V)
Outpu t Current :Io [mA]
20
NJM2800_3.3V
Ground Pi n Current v.s. Output Current
0.3
NJM2800_3.3V
Dropout Voltage vs. Output Current
@:Ta=25 C
Co=1µF
(Ceramic)
Cd=0.1µF
o
@:Ta=25 C
V
IN
=4.3V
Co=1.0µF
(Ceramic)
Cd=0.1µF
o
0.25
Ground Pi n Current : I
GND
(mA)
15
Dropout Voltage:dV
I-O
( V)
0.2
10
0.15
0.1
5
0.05
0
0
50
100
150
200
0
0
50
100
150
200
Output Current : I
O
(mA)
Output Current:Io(mA)
0
NJM2800_3.3V
Load Regulati on vs. Output Current
@:Ta=25
o
C
V
IN
=4.3V
Co=1µF
(Ceramic)
Cd=0.1µF
300
NJM2800_3.3V
Peak Output Current vs. Input Voltage
250
Peak Output Current : Io
MAX
(mA)
-10
Load Regulati on : dVo/dIo(mV)
dVo/dIo(m
(mV)
200
-20
150
-30
100
-40
50
@:Ta=25
o
C
Co=1µF
(Ceramic)
Cp=0.01µF
6
8
10
12
14
-50
0
50
100
150
200
0
Output Current : Io(mA)
Input Voltage : V
IN
(V)
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