NJRC NJM2807

NJM2807
Low Dropout Voltage Regulator with Reset
„ GENERAL DISCRIPTION
The NJM2807 is a low dropout voltage regulator with reset
function.
It provides up to 500mA 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.
„ FEATURES
z Output Voltage Accuracy
Vo ±1.0%
z Reset Voltage Accuracy
VRT ±1.0%
z Adjust reset delay time with external capacitor.
z Ripple Rejection
75dB typ. (f=1kHz)
z Output Voltage Monitor type
z Open Collector Output
z Internal Short Circuit Current Limit
z Internal Thermal Overload Protection
z Bipolar Technology
z Package Outline
TO-252-5
„ PACKAGE OUTLINE
NJM2807DL2
NJM2807DL3
„ PIN CONFIGURATION
3
3
1.VOR
2.VIN
3.GND
4.VOUT
5.Cd
123 45
123 45
NJM2806DL2
NJM2806DL3
„ OUTPUT VOLTAGE/ DETECTION VOLTAGE
Device Name
Output Voltage
Detection Voltage
NJM2807DL*-0543
5.0V
4.3V
„ EQUIVALENT CIRCUIT
VIN
VOUT
VOR
Bandgap
Reference
Thermal
Protection
GND
Cd
Ver.2004-12-24
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NJM2807
„ ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
VIN
Power Dissipation
PD
RATINGS
Operating Temperature
Topr
+14
8 (Tc=25°C)
0.8(Ta≤25°C)
−40∼+85
Storage Temperature
Tstg
−40∼+125
(Ta=25°C)
UNIT
V
W
°C
°C
„ ELECTRICAL CHARACTERISTICS
(VIN=Vo+1V, CIN=0.33µF, Co=1.0µF (Co=2.2µF: Vo≤2.4V) Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
Quiescent Current
VIN=Vo+2V, Io=0mA
IQ
MIN.
TYP.
MAX.
UNIT
−
330
430
µA
−1.0%
500
−
650
+1.0%
V
VIN=Vo+1V∼Vo+6.0V, Io=30mA
−
−
−
0.10
%/V
Io=0∼500mA
−
0.03
%/mA
Io=300mA
−
−
0.18
0.28
V
ein=200mVrms, f=1kHz, Io=10mA,
Vo=3.0V Version
−
75
−
dB
Ta=0∼85°C, Io=10mA
−
±50
−
ppm/°C
VNO
f=10Hz∼80kHz, Io=10mA, Vo=3.0V Version
−
50
−
µVrms
VIN=H→L
Reset Output Delay Time
VRT
VRTH
RORL
IORH
IORL
td
Operation Voltage Limit
VOPL
VORL=0.4V
Regulator Block
Dropout Voltage
Vo
Io
∆Vo/∆VIN
∆Vo/∆Io
∆VI_O
Ripple Rejection
RR
Output Voltage
Output Current
Line Regulation
Load Regulation
Output Voltage Temperature
Coefficient
Output Noise Voltage
∆Vo/∆T
Io=30mA
Vo-0.3V
mA
Reset Block
Voltage Detection
Hysteresis Voltage
Low Level Output Voltage
Output Leak Current
On time Output Current
VIN=H→L→H
VIN=VRT-0.5V, RL=100kΩ
VIN= VRT+0.5V
VIN=VRT-0.5V, RL=0Ω
VIN=(VRT-0.5V)→ (VRT+0.5V), Cd=0.1µF
+1.0%
−1.0%
−
VRT ×3% VRT ×5% VRT ×8%
100
300
−
0.1
−
−
5
−
−
9
10
11
−
0.9
−
V
mV
mV
µA
mA
ms
V
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.
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Ver.2004-12-24
NJM2807
„ TIMING CHART
VIN[V]
VO
t
VO[V]
VO
VRTH
VRT
t
VOR[V]
VO
td
td
td
t
∗ When the pull-up of the VOR is carried out to VIN through resistance.
Ver.2004-12-24
-3-
NJM2807
„ TEST CIRCUIT
IQ
VIN
VO
IOR
NJM2807
RL
0.33µF
Cd
VIN
V
VOR
1.0µF *1 IOUT
(Ceramic)
GND
V
0.1µF
VOUT
VOR
*1 Vo≤2.4V: Co=2.2µF (Ceramic)
„ TYPICAL APPLICATIONS
VIN
VIN
VO
NJM2807
100kΩ
0.33µF
Cd
VOUT
VOR
1.0µF *2
VOR
GND
0.1µF
*2 Vo≤2.4V: Co=2.2µF
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Ver.2004-12-24
NJM2807
[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.
Ver.2004-12-24
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