NJM2800
PRELIMINARY
Low Dropout Voltage Regulator with Reset
■ GENERAL DISCRIPTION ■ PACKAGE OUTLINE
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.
■ FEATURES
• Output Voltage Accuracy Vo = ±2.2%
• Reset Voltage Accuracy Vreset = ±2.0%
• Reset Hold Time td = 10mS±2.5mS
• Quiescent Current IQ=300µA (max.)
• Open Collector Output
• Bipolar Technology
• Input 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
NJM2800-2528 2.5V 2.8V
NJM2800-3342 3.3V 4.2V
■ BLOCK DIAGLAM
NJM2800F** NJM2800U**
■ PIN CONFIGURATION
1.VOUT
2.GND
3.Cd
4.VOR
5.VIN
1 5
2
3 4
1.VIN
2.GND
3.VOR
4.Cd
5.VOUT
( MTP-5 )
( SOT-89 )
VO
GND
VIN
Thermal
Protection
Bandgap
Reference
Cd
VOR
5 4
1 2 3
NJM2800
PRELIMINARY
■ ABSOLUTE MAXIMUM RATINGS (Ta=25°
°°
°C)
PARAMETER SYMBOL RATINGS UNIT
Input Voltage VIN +14 V
200 (MTP5)
Power Dissipation PD 350 (SOT-89) mW
Operating Temperature Topr −40∼+85 °C
Storage Temperature
Tstg −40∼+125 °C
■ ELECTRICAL CHARACTERISTICS (VIN=Vo+1V , CIN=0.1µ
µµ
µF, Co=1µ
µµ
µF (
((
( Vo≤2.6V: Co=2.2µ
µµ
µF )
))
) Ta=25°
°°
°C )
PARAMETER SYMBOL CONDITION MIN. TYP. MAX. UNIT
Quiescent Current IQ Io=0mA − 250 350
µA
Regulator Block
Output Voltage Vo Io=30mA −2.2% − +2.2% V
Output Current Io Vo-0.3V 150 200 − mA
Line Regulation ∆Vo/∆VIN VIN=Vo+1V∼Vo+6V, Io=30mA − − 0.10 %/V
Load Regulation ∆Vo/∆Io Io=0∼100mA − − 0.03 %/mA
Dropout Voltage ∆VI_O Io=60mA − 0.10 0.18 V
Ripple Rejection RR Ein=200mVrms, f=1kHz, Io=10mA,Vo=3V − 60 − dB
Output Voltage
Tem
p
erature Coefficient
∆Vo/∆T Ta=0∼85°C, Io=10mA − ±50 − ppm/°C
Output Noise Voltage VNO f=10Hz∼100kHz, Io=10mA, Vo=3V − 45 − µVrms
Reset Block
Voltage Detection VRT VIN=H→L −2% − +2% V
Hysteresis Voltage VRTH VIN=H→L→H VRT×3VRT×5VRT×8mV
Low Level Output RORL VIN=VRT-0.5V, RL=100kΩ − 100 300 mV
Output Leak Current IORH V
IN= VRT-0.5V − − 0.1 µA
On time Output Current IORL VIN=VRT-0.5V, RL=0Ω 5 − − mA
Reset Output Delay
Ti
td VIN=(VRT-0.5V)→ (VRT+0.5V), Cd=0.1µF 9 10 11 mS
Operation Voltage Limit VOPL 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.
NJM2800
PRELIMINARY
■ TIMING CHART
V
RT
V
O
V
O
V
OR
V
O
V
IN
V
RTH
t
d
t
t
t
t
d
t
d
∗ VOR is the case where a pull-up is carried out to VIN through resistance.
NJM2800
PRELIMINARY
■ TEST CIRCUIT
■ TYPICAL APPLICATIONS
NJM2800
VIN V
O
Cd VOR
GND VOUT
IOUT
V
RL
1.0
µ
F
V
0.1
µ
F
0.1
µ
F
VIN
IQ
VOR
IOR
NJM2800
VIN V
O
Cd VOR
GND
VOUT
100kΩ 1.0µF
0.1µF
0.1µF
VIN
VOR
The specifications on this data book are only given for
information, without any guarantee as regards eithe
r
mistakes or omissions. The application circuit in this dat
a
book are described only to show representative usages o
f
the product and not intended for the guarantee o
r
permission of an y right including the industrial right s .
