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PDF NJW4107 Data sheet ( Hoja de datos )
| Número de pieza | NJW4107 | |
| Descripción | LDO | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJW4107 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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NJW4107
45V Io=300mA LDO
■FEATURES
■GENERAL DESCRIPTION
● Fast Transient Response
● Operating Voltage
4.0V to 40V
● Operating Temperature Ta=-40 C to 125°C
●Output Voltage Accuracy
● Output Current
● ON/OFF Control
VO 1.0%(Ta=25 C)
VO 1.5%(Ta=-40 C to 125°C)
IO(min.)=300mA
A ver. only
● Correspond to MLCC
● Under Voltage Lock Out circuit
● Thermal Shutdown Circuit
● Over Current Protection Circuit
● Package Outline
A ver. SOT-89-5-2
B ver. SOT-89-3
The NJW4107 is a 45V, Io=300mA fast response low
dropout regulator. It achieves fast transient response,
therefore it provides stable output voltage at line/load
fluctuations.
Output voltage accuracy is guaranteed 1.5% under
wide range conditions: VIN=Vo+1V to 40V, Io=0mA to
300mA and Ta=-40 C to 125°C.
Because of wide input voltage range and wide
operating temperature range, the NJW4107 is suitable
for various applications including automotive
applications.
■APPLICATION
● Automotive infotainment
● Automotive ECU unit
● Industrial equipment
■TYPICAL APPLICATION
VIN VIN
VOUT
1.0μF
NJW4107-A
VOUT
2.2μF
CONTROL
GND
NC
■BLOCK DIAGRAM
A version
B version
Ver.1.0
http://www.njr.com/
-1-
1 page  
NJW4107
■THERMAL CHARACTERISTICS
PARAMETER
Junction-to-ambient
thermal resistance
Junction-to-Top of package
characterization parameter
SYMBOL
θja
ψjt
VALUE
SOT-89-3/-5-2
SOT-89-3/-5-2
200(6)
52(7)
43(6)
19(7)
UNIT
°C/W
°C/W
(6): Mounted on glass epoxy board. (76.2 114.3 1.6mm: based on EIA/JEDEC standard, 2Layers)
(7): Mounted on glass epoxy board. (76.2´114.3´1.6mm: based on EIA/JEDEC standard, 4Layers), internal Cu area: 74.2x74.2mm
(For 4Layers :Applying 74.2 x 74.2mm inner Cu area and thermal via hole to board based on JEDEC standard JESD51-5)
■POWER DISSIPATION vs. AMBIENT TEMPERATURE
3000
NJW4107U2/U3 (SOT-89-5-2/SOT-89-3)
Power Dissipation
(Topr = -40ºC to +125ºC, Tj=150ºC)
2500
on 4 layers board (7)
2000
1500
1000
500
on 2 layers board (6)
0
-50 -25
0 25 50 75 100 125 150
Temperature : (ºC)
Ver.1.0
http://www.njr.com/
-5-
5 Page 
NJW4107
■APPLICATION NOTE / GLOSSARY
*Under Voltage Lockout UVLO
The NJW4107 includes UVLO circuit to prevent malfunction in case of low input voltage.
When the input voltage increases and exceeds the “UVLO Release voltage” (2.8V typ.),UVLO is released and the
output voltage rises up.
The UVLO circuit has hysteresis(350mV typ.). Therefore, if the input voltage decreases below the threshold
voltage:“UVLO Release voltage” – “UVLO Hysteresis Voltage”, the output voltage shuts down.
NJW4107
Output Voltage vs Input Voltage
6
UVLO Release
5 UVLO Detect
4
3
2
@Ta=25ºC
1 Io=0mA
CIN=1.0µF(Ceramic)
Co=2.2µF(Ceramic)
0
012345678
Input Voltage : VIN (V)
*Input Capacitor CIN
The input capacitor CIN is required in order to prevent oscillation and reduce power supply ripple of applications when high
power supply impedance or a long power supply line.
Therefore, the recommended capacitance (refer to conditions of ELECTRIC CHARACTERISTIC) or larger input capacitor,
connected between VIN and GND as short path as possible, is recommended in order to avoid the problem.
*Output Capacitor CO
The output capacitor CO is required for a phase compensation of the internal error amplifier, and the capacitance and the
equivalent series resistance (ESR) influence stable operation of the regulator.
If use a smaller output capacitor than the recommended capacitance (refer to conditions of ELECTRIC CHARACTERISTIC),
it may cause excess output noise or oscillation of the regulator due to lack of the phase compensation. Therefore, the
recommended capacitance or larger output capacitor, connected between VOUT and GND as short path as possible, is
recommended for stable operation. The recommended capacitance may be different by output voltage, therefore confirm the
recommended capacitance of the required output voltage.
Furthermore, a larger output capacitor reduces output noise and ripple output, and also improves Output Transient Response
when a load changes rapidly.
Selecting the output capacitor, should consider varied characteristics of a capacitor: frequency characteristics, temperature
characteristics, DC bias characteristics and so on. Therefore, the capacitor that has a sufficient margin of the rated voltage
against the output voltage and superior temperature characteristics, is recommended for CO.
Ver.1.0
http://www.njr.com/
- 11 -
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet NJW4107.PDF ] | |
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