|
|
PDF L5970 Data sheet ( Hoja de datos )
| Número de pieza | L5970 | |
| Descripción | UP TO 1A STEP DOWN SWITCHING REGULATOR | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de L5970 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
|
No Preview Available !
L5970D
UP TO 1A STEP DOWN SWITCHING REGULATOR
s UP TO 1A OUTPUT CURRENT
s OPERATING INPUT VOLTAGE FROM 4.4V
TO 36V
s 3.3V / (±2%) / REFERENCE VOLTAGE
s OUTPUT VOLTAGE ADJUSTABLE FROM
1.2V TO 35V
s LOW DROPOUT OPERATION: 100% DUTY
CYCLE
s 250KHz INTERNALLY FIXED FREQUENCY
s VOLTAGE FEEDFORWARD
s ZERO LOAD CURRENT OPERATION
s INTERNAL CURRENT LIMITING
s INHIBIT FOR ZERO CURRENT
CONSUMPTION
s SINCHRONIZATION
s PROTECTION AGAINST FEEDBACK
DISCONNECTION
s THERMAL SHUTDOWN
APPLICATIONS:
s CONSUMER: STB, DVD, TV, VCR,CAR
RADIO, LCD MONITORS
s NETWORKING: XDSL, MODEMS,DC-DC
MODULES
s COMPUTER: PRINTERS, AUDIO/GRAPHIC
CARDS, OPTICAL STORAGE, HARD DISK
DRIVE
s INDUSTRIAL: CHARGERS, CAR BATTERY
DC-DC CONVERTERS
TEST APPLICATION CIRCUIT
SO8
ORDERING NUMBERS: L5970D (SO8)
L5970D013TR (T&R)
DESCRIPTION
The L5970D is a step down monolithic power
switching regulator capable to deliver up to 1A at
output voltages from 1.2V to 35V.
The device uses an internal P-Channel D-MOS
transistor (with a typical Rdson of 250mΩ) as
switching element to minimize the size of the ex-
ternal components.
An internal oscillator fixes the switching frequency
at 250KHz.
Having a minimum input voltage of 4.4V only, it is
particularly suitable for 5V bus, available in all
computer related applications.
Pulse by pulse current limit with the internal fre-
quency modulation offers an effective constant
current short circuit protection.
VREF
3.3V
VIN = 4.4V to 35V
VCC
SYNC.
6
8
2
L5970D
1
C1
10µF
35V
CERAMIC
COMP
C4
22nF
43
INH.
C3
220pF
R3
4.7K
5
7
GND
OUT L1 33µH
VOUT=3.3V
D1
STPS2L40U R1
FB
5.6K
C2
100µF
10V
R2
3.3K
D98IN954C
May 2003
1/10
1 page  
L5970D
Figure 7. Quiescent Current vs. Junction
Temperature
Iq (mA)
2
Figure 9. Switching Frequency vs.Junction
Temperature
Fsw (KHz)
260
1.8 250
1.6
Vcc = 12V
DC = 0%
1.4
1.2
-50
0 50 100 150
Tj (°C)
Figure 8. Shutdown Current vs.Junction
Temperature
Ishd (µA)
70
240
230
220
-50
Vcc = 12V
Vo = 3.3V
0 50 100
Tj (C)
150
60
Vcc = 12V
50
40
30
-50
0 50 100 150
Tj (°C)
5/10
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet L5970.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| L5970 | UP TO 1A STEP DOWN SWITCHING REGULATOR | STMicroelectronics |
| L5970AD | 1.5A SWITCH STEP DOWN SWITCHING REGULATOR | STMicroelectronics |
| L5970D | UP TO 1A STEP DOWN SWITCHING REGULATOR | STMicroelectronics |
| L5970D013 | UP TO 1A STEP DOWN SWITCHING REGULATOR | STMicroelectronics |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |