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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
123 45
123 45
1.VOR 2.VIN 3.GND 4.VOUT 5.Cd
NJM2806DL2
NJM2806DL3
OUTPUT VOLTAGE/ DETECTION VOLTAGE Device Name Output Voltage Detection Voltage NJM2807DL*-0543 5.0V 4.3V
EQUIVALENT CIRCUIT
VIN VOR
Thermal Protection
VOUT
Bandgap Reference
GND Cd
Ver.2004-12-24
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NJM2807
ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL
Input Voltage Power Dissipation Operating Temperature Storage Temperature VIN PD Topr Tstg (Ta=25°C) UNIT V W
RATINGS +14 8 (Tc=25°C) 0.8(Ta≤25°C) −40∼+85
−40∼+125
°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
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
MIN.
− −1.0% 500 − − − − − −
TYP.
330 − 650 − − 0.18 75 ±50 50
MAX.
430 +1.0% − 0.10 0.03 0.28 − − −
UNIT
µA V mA %/V %/mA V dB ppm/°C µVrms V mV mV µA mA ms V
Vo Io ∆Vo/∆VIN ∆Vo/∆Io ∆VI_O RR ∆Vo/∆T VNO VRT VRTH RORL IORH IORL td VOPL
Io=30mA Vo-0.3V VIN=Vo+1V∼Vo+6.0V, Io=30mA Io=0∼500mA Io=300mA ein=200mVrms, f=1kHz, Io=10mA, Vo=3.0V Version Ta=0∼85°C, Io=10mA f=10Hz∼80kHz, Io=10mA, Vo=3.0V Version VIN=H→L 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 VORL=0.4V
+1.0% −1.0% − VRT ×3% VRT ×5% VRT ×8% 100 300 − 0.1 − − 5 − − 9 10 11 − 0.9 −
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
0.33µF VIN
RL
Cd GND
VOR
V V
1.0µF *1 IOUT (Ceramic) VOR VOUT
0.1µF *1 Vo≤2.4V: Co=2.2µF (Ceramic)
TYPICAL APPLICATIONS
VIN
VIN
VO
VOUT
NJM2807
0.33µF
100kΩ
1.0µF *2 VOR
Cd GND
0.1µF
VOR
*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
-5-
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