Voltage Regulator. SPX2940 Datasheet

SPX2940 Regulator. Datasheet pdf. Equivalent


Sipex Corporation SPX2940
www.DataSheet4U.com
®
SPX2940
1A Low Dropout Voltage Regulator
Fixed Output, Fast Response
FEATURES
Guaranted 1.5A Peak Current
Low Quiescent Current
Low Dropout Voltage of 280mV at 1A
Extremely Tight Load and Line Regulation
Extremely Fast Transient Response
Reverse-battery Protection
Internal Thermal Protection
Internal Short Circuit Current Limit
Replacement for LM2940, MIC2940A,
AS2940
Standard TO-220 and TO-263 packages
SPX2940
3 Pin TO-263
1 23
VIN GND VOUT
Now Available in Lead Free Packaging
APPLICATIONS
Powering VGA & Sound Card
LCD Monitors
USB Power Supply
Power PCTM Supplies
SMPS Post-Regulator
PDA or Notebook Computer
High Efficiency Linear Power Supplies
Portable Instrumentation
Constant Current Regulators
Cordless Telephones
Automotive Electronics
DESCRIPTION
The SPX2940 is a 1A, accurate voltage regulators with a low drop out voltage of 280mV (typical)
at 1A. These regulators are specifically designed for low voltage applications that require a low
dropout voltage and a fast transient response. They are fully fault protected against over-current,
reverse battery, and positive and negative voltage transients.
The SPX2940 is offered in 3-pin TO-220 & TO-263 packages. For a 3A version, refer to the
SPX29300 data sheet.
TYPICAL APPLICATIONS CIRCUIT
VIN
6.8µF+
1 SPX2940 3
2
VOUT
+10µF
Figure 1. Fixed Output Linear Regulator.
Date: 5/25/04
SPX2940 1A Low Dropout Voltage Regulator
1
© Copyright 2004 Sipex Corporation


SPX2940 Datasheet
Recommendation SPX2940 Datasheet
Part SPX2940
Description Low Dropout Voltage Regulator
Feature SPX2940; www.DataSheet4U.com ® SPX2940 1A Low Dropout Voltage Regulator Fixed Output, Fast Response FEATUR.
Manufacture Sipex Corporation
Datasheet
Download SPX2940 Datasheet




Sipex Corporation SPX2940
ABSOLUTE MAXIMUM RATINGS
Lead Temperature (soldering, 5 seconds) ................................. 260°C
Storage Temperature Range ..................................... -65°C to +150°C
Operating Junction Temperature Range ................... -40°C to +125°C
Input Voltage (Note 5) ................................................................... 16V
ELECTRICAL CHARACTERISTICS
at VIN=VOUT + 1V and IOUT = 10 mA, CIN = 6.8 µF, COUT = 10µF; TA= 25°C, unless otherwise specified. The
Boldface applies over the junction temperature range. Adjustable versions are set at 5.0V.
PARAMETER
CONDITIONS
TYP
1.8V Version
Output Voltage
2.5V Version
IOUT = 10mA
10mAIOUT1A, 6VVIN16V
1.8
1.8
Output Voltage
IOUT = 10mA
10mAIOUT 1A, 6VVIN16V
2.5
2.5
3.3V Version
Output Voltage
IOUT = 10mA
10mAIOUT 1A, 6VVIN16V
3.3
3.3
5.0V Version
Output Voltage
IOUT = 10mA
10mAIOUT 1A, 6VVIN16V
5.0
5.0
All Voltage Options
Line Regulation
Load Regulation
IO=10mA, (VOUT+1V)VIN16V
VIN=VOUT+1V, 10mAIOUT1A
0.2
0.3
V
Output Voltage
20
T Temperature Coef.
Dropout Voltage (Note 1) IO =100mA
(except 1.8V version) IO =1A
Ground Current (Note 3) IO =750mA, VIN=VOUT, + 1V
IO =1A
70
280
12
18
IGNDDO Ground Pin
Current at Dropout
VIN=0.1V less than specified VOUT
IOUT= 10mA
1.2
Current Limit
Output Noise Voltage
10Hz to 100kHz)
VOUT=0V (Note 2)
CL= 10µF
2.2
400
IL=100mA
CL=33µF
260
Thermal Resistance TO-220 Junction to Case, at Tab 3
TO-220 Junction to Ambient
60
TO-263 Junction to Case, at Tab 3
TO-263 Junction to Ambient
60
MIN
1.746
1.710
2.425
2.375
3.201
3.135
4.850
4.750
1.5
MAX UNITS
1.854
1.890
V
2.575
2.625
V
3.399
3.465
V
5.150
5.250
V
1.0 %
1.5 %
100 ppm/°C
200 mV
550
25 mA
mA
A
µVRMS
°C/W
NOTES:
Note 1: Dropout voltage is defined as the input to output differential when the output voltage drops to 99% of its normal value.
Note 2: VIN=VOUT (NOMINAL) + 1V. For example, use VIN=4.3V for a 3.3V regulator. Employ pulse-testing procedures to minimize temperature rise.
Note 3: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current to the ground current.
Note 4: Thermal regulation is defined as the change in the output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation
effects.
Note 5: Maximum positive supply voltage of 20V must be of limited duration (<100ms) and duty cycle (<1%). The maximum continuous supply voltage is 16V.
Date: 5/25/04
SPX2940 1A Low Dropout Voltage Regulator
2
© Copyright 2004 Sipex Corporation



Sipex Corporation SPX2940
IN
1.240V
Reference
+
-
Ibias
Thermal
Shutdown
O.V
ILIMIT
28V
BLOCK DIAGRAM
OUT
R1
R2
GND
TYPICAL PERFORMANCE CHARACTERISTICS
3.320
3.315
3.310
3.305
3.300
3.295
3.290
3.285
3.280
4 6 8 10
VIN (V)
Figure 2. Line Regulation
3.3V Device
IL = 10mA
CL = 10µF
12 14 16
80.0
70.0
60.0
50.0
40.0
30.0
20.0 3.3V Device
10.0
VIN = 4.3V
CL = 10µF
0.0
0.00 0.25
0.50
0.75
1.00
1.25 1.50
IL (A)
Figure 4. Ground Current vs Load Current
3.310
3.305
3.300
3.295
3.290
3.285
3.280
0.00
0.25
0.50
0.75
IL (A)
Figure 3. Load Regulation
3.3V Device
VIN = 4.3V
CL = 10µF
1.00
1.25
1.50
300
280
260
240
220
3.3V Device
IL = 10mA
200 CL = 10µF
180
4
6
8 10 12 14 16
VIN (V)
Figure 5. Ground Current vs Input Voltage
Date: 5/25/04
SPX2940 1A Low Dropout Voltage Regulator
3
© Copyright 2004 Sipex Corporation







@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)