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PDF NJM2873 Data sheet ( Hoja de datos )
| Número de pieza | NJM2873 | |
| Descripción | LOW DROPOUT VOLTAGE REGULATOR | |
| Fabricantes | JRC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJM2873 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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NJM2873
LOW DROPOUT VOLTAGE REGULATOR
! GENERAL DESCRIPTION
The NJM2873 is low dropout voltage regulator designed for cellular
phone application.
Advanced Bipolar technology achieves low noise, high ripple
rejection and low quiescent current.
! PACKAGE OUTLINE
NJM2873PB1
! FEATURES
" High Ripple Rejection
70dB typ. (f=1kHz)
" Output Noise Voltage
Vno=30µVrms (Cp=0.01µF)
" Output capacitor with 1.0µF ceramic capacitor (Vo≥2.7V)
" Output Current
Io(max.)=150mA
" High Precision Output
Vo±1%
" Low Dropout Voltage
0.10V typ. (Io=60mA)
" ON/OFF Control
(Active High)
" Internal Short Circuit Current Limit
" Internal Thermal Overload Protection
" Bipolar Technology
" Package Outline
FFP12-B1 (2.0×2.0×0.85mm)
! PIN CONFIGURATION
98 7
7 89
10 6 6
11 5 5
12 4 4
123
3 21
TOP
BOTTOM
NJM2873PB1
! EQUIVALENT CIRCUIT
VIN
Cont
PIN FUNCTION
1. VIN
10 2. VIN
11
3. VIN
4. CONTROL
12 5. GND
6. GND
7. GND
8. NOISE BYPASS
9. NC
10. VOUT
11. VOUT
12. VOUT
Thermal
Protection
VOUT
Bandgap
Reference
Noise Bypass
GND
Ver.2006-02-22
-1-
1 page  
www.DataSheet4U.com
2 In use of ON/OFF CONTROL:
VOUT
VIN
VOUT
VOUT
NC
NJM2873
1.0µF *4
VOUT
VIN
0.1µF
VIN
VIN
NJM2873
NOISE
BYPASS
GND
CONTROL
R
(0 ~ 300kΩ)
*4 Vo≤2.6V version: Co=2.2µF
GND
GND
Cp=0.01µF
State of control terminal:
•“H”→ output is enabled.
•“L” or “open” → output is disabled.
&Noise bypass Capacitance Cp
Noise bypass capacitance Cp reduces noise generated by band-gap reference circuit. Noise level and ripple
rejection will be improved when larger Cp is used. Use of smaller Cp value may cause oscillation.
Use the Cp value of 0.01µF greater to avoid the problem.
&In the case of using a resistance "R" between VIN and control.
The current flow into the control terminal while the IC is ON state (ICONT) can be reduced when a pull up resistance
"R" is inserted between VIN and the control terminal.
The minimum control voltage for ON state (VCONT (ON)) is increased due to the voltage drop caused by ICONT and the
resistance "R". The ICONT is temperature dependence as shown in the "Control Current vs. Temperature"
characteristics. Therefore, the resistance "R" should be carefully selected to ensure the control voltage exceeds the
VCONT (ON) over the required temperature range.
Ver.2006-02-22
-5-
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet NJM2873.PDF ] | |
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