L5970D Datasheet PDF - STMicroelectronics
Part Number | L5970D | |
Description | UP TO 1A STEP DOWN SWITCHING REGULATOR | |
Manufacturers | STMicroelectronics | |
Logo | ||
There is a preview and L5970D download ( pdf file ) link at the bottom of this page. Total 10 Pages |
Preview 1 page 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
|
|
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
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for L5970D electronic component. |
Information | Total 10 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Download | [ L5970D.PDF Datasheet ] |
Share Link :
Electronic Components Distributor
An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists. |
SparkFun Electronics | Allied Electronics | DigiKey Electronics | Arrow Electronics |
Mouser Electronics | Adafruit | Newark | Chip One Stop |
Featured Datasheets
Part Number | Description | MFRS |
L5970 | The function is UP TO 1A STEP DOWN SWITCHING REGULATOR. STMicroelectronics | |
L5970AD | The function is 1.5A SWITCH STEP DOWN SWITCHING REGULATOR. STMicroelectronics | |
L5970D | The function is UP TO 1A STEP DOWN SWITCHING REGULATOR. STMicroelectronics | |
Semiconductors commonly used in industry:
1N4148 |  
BAW56 |
1N5400 |
NE555 | | ||
Quick jump to:
L597
1N4
2N2
2SA
2SC
74H
BC
HCF
IRF
KA |