900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






ETC

LM3940 Datasheet Preview

LM3940 Datasheet

Voltage Regulator

No Preview Available !

Bay Linearwww.DataSheet4U.com
Inspire the Linear Power
1.25A High Current Low Dropout
Voltage Regulator for Convert 5V & 3.3V
LM3940
Description
The Bay Linear LM3940 is a 1.25A high accuracy, low dropout
voltage regulator with only 40mV at light loads and
350mV(Typ.)@ 1.0A) and low quiescent current of 240µA typical.
The LM3940 is designed for low voltage a application that requires
lower dropout voltage and faster transient response. This device is
an excellent choice for use in powering low voltage applications
where require a lower dropout, faster transient response to regulate
from +2.5V to 3.8V supplies and as a post regulator for switching
supplies applications.
The LM3940 offers full protection against over-current faults,
reversed input polarity, reversed load insertion, and positive and
negative transient voltage. On-Chip trimming adjusts the reference
voltage to 1%.
The LM3940 are offered in a 3-pin SOT-223, TO-220 & TO-263
package compatible with other 3 terminal regulators. The LM3940
is also offer in a new LPDD (Low Profile TO-263) package from
4.47 mm (DD) tickness down to only 1.27 mm (LPDD) total
tickness.
Features
High output accuracy of 1%
Fix Output 5.0v & 3.3V
Output Current of 1.25A
Low Dropout Voltage
Low quiescent current
Extremely Tight Load & Line Regulation
Reverse-battery and “Load Dump” Protection
Zero Current Shutdown Mode (5-pin version)
Offer in TO-263, TO-252, TO-220, SOT-223, &
New Slim LPDD
Similar to industry Standard LM3940
Applications
Powering VGA & Sound Card
LCD Monitor
Battery Powered Equipments/Laptop & Notebook
SMPS Post Regulator / DC to DC Modules
High Efficiency Linear Power Supply
Adjustable Power Supply
Bar Code Scanners
Pin Connection
Ordering Information
Devices
LM3940T
LM3940S
LM3940D
LM3940N
LM3940J
XX=Output Voltage
Package
TO-220-3
TO-263-3
TO-252
SOT-223-3
LPDD-3
Temp.
-40 °C to 125 °C
-40 °C to 125 °C
-40 °C to 125 °C
-40 °C to 125 °C
-40 °C to 125 °C
Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556
www.baylinear.com




ETC

LM3940 Datasheet Preview

LM3940 Datasheet

Voltage Regulator

No Preview Available !

www.DataSheet4U.com
ABSOLUTE MAXIMUM RATINGS
Lead Temp. (Soldering, 5 Seconds).................................260°C
Storage Temperature Range.............................. -65° to +150°C
Operating Junction Temperature Range
LM3940 Control Section........................... -45°C +125°C
LM3940 Power Transistor..........................-45°C +150°C
LM3940
Input Voltage ........................................................26V
Maximum Output Current....................................3.5A
Input Supply Voltage (Survival) .......... -20V to +60V
ELECTRICAL CHARACTERISTICS IOUT = 5mA, V IN =V OUT + 1V, I l = 1250mA, C L = 10µF. Ta=25°C, unless otherwise specified.
PARAMETER
CONDITIONS
Typ LM3940 Units
Min Max
Output Voltage
5mAIL1.25A
3.3
3.267
3.330
3.3
3.234
3.366
V
Output Voltage
5mAIL1.25A
5.0 4.95 5.05
5.0 4.90 5.10
V
Line Regulation
IO = 5mA, 4.5VVIN 5.5V
20
40 mV
Load Regulation
50mA IOUT1.25 A
35 50 mV
Dropout Voltage
Quiescent Current
Short Circuit Current
IO = 5mA
IO = 1000mA
IO = 1250mA
IO = 5mA, VIN = VOUT, +1V
IO = 1000mA, VIN = VOUT, +1V
IO = 1.25A
RL = 0
120 180
400 600
500 800
240 350
22 35
35 70
1.7 1.2
mV
µA
mA
A
Current Limit
Output Noise Voltage
(10Hz to 100kHz)
IL = 100mA
VOUT = 0V (Note 4)
CL = 10µF
CL = 33µF
1.7 1.5
400
260
A
µV RMS
BLOCK DIAGRAM
Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556
www.baylinear.com


Part Number LM3940
Description Voltage Regulator
Maker ETC
PDF Download

LM3940 Datasheet PDF






Similar Datasheet

1 LM394 LM194/LM394 Supermatch Pair
National Semiconductor
2 LM3940 1A Low Dropout Regulator
National Semiconductor
3 LM3940 Voltage Regulator
ETC
4 LM3940 1-A Low-Dropout Regulator
etcTI





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy