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PDF NJU7691 Data sheet ( Hoja de datos )
| Número de pieza | NJU7691 | |
| Descripción | 300mA Synchronous Step-Down switching regulator IC | |
| Fabricantes | NJR | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJU7691 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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NJU7691www.DataSheet4U.com
300mA Synchronous Step-Down switching regulator IC
■GENERAL DESCRIPTION
The NJU7691 is a synchronous rectification type switching
regulator IC with a power MOSFET (300mA output).
It has an over current detection and an overheat protection
circuit. Therefore, the circuit can be configured with few
external parts.
The output voltage can be set from 0.8V. It is suitable for
supplying power to a digital chip and a logic IC with low
voltage.
■PACKAGE OUTLINE
NJU7691RB1
■FEATURES
● 300mA Synchronous Step-Down
● PWM switching control
● Operating Voltage
2.2V to 7V
● Wide Oscillator Range 300kHz to 1MHz
● Maximum Duty Cycle 100%
● Stand-by Current
5µA max.
● Soft-Start Function
4ms typ.
● Over Current Protection
● C-MOS Technology
● Package Outline
NJU7691RB1 : TVSP8
■PIN CONFIGURATION
1
2
3
4
NJU7691RB1
8
7
6
5
PIN FUNCTION
1. SW
2. V+
3. FB
4. IN-
5. ON/OFF
6. RT
7. AGND
8. PGND
Ver.2010-04-14
-1-
1 page  
■TYPICAL CHARACTERISTICS
Oscillation Frequency vs. Timing Resistance
1000
(V+=3.3V, Ta=25oC)
100
10
100
Timing Resistance RT (kΩ)
Reference Voltage vs. Operating Voltage
0.82
(RT=47kΩ, Ta=25oC)
0.81
0.8
0.79
0.78
0
246
Operating Voltage V+ (V)
8
Quiescent Current vs. Operating Voltage
3 (RT=47kΩ, RL=Non Load, Ta=25oC)
2.5
2
1.5
1
0.5
0
02468
Operating Voltage V+ (V)
Ver.2010-04-14
NJU7691www.DataSheet4U.com
Oscillation Frequency vs. Operating Voltage
740 (RT=47kΩ, Ta=25oC)
720
700
680
660
0
246
Operating Voltage V+ (V)
8
Switching Current Limit vs. Operating Voltage
900 (RT=47kΩ, Ta=25oC)
800
700
600
500
400
0
246
Operating Voltage V+ (V)
8
Standby Current vs. Operating Voltage
100 (VON/OFF=0V, Ta=25oC)
10
1
0.1
0.01
0.001
0
246
Operating Voltage V+ (V)
8
-5-
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet NJU7691.PDF ] | |
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