1-A, 26-V, high-PSRR, low-dropout voltage regulator
Product details
Parameters
Package | Pins | Size
Features
- Input Voltage Range = 6 V to 26 V
- Dropout Voltage Typically 0.5 V at IOUT = 1 A
- Output Current in Excess of 1 A
- Output Voltage Trimmed Before Assembly
- Reverse Battery Protection
- Internal Short Circuit Current Limit
- Mirror Image Insertion Protection
- P+ Product Enhancement Tested
Description
The LM2940-N and LM2940C positive voltage regulators feature the ability to source 1 A of output current with a dropout voltage of typically 0.5 V and a maximum of 1 V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground current when the differential between the input voltage and the output voltage exceeds approximately 3 V. The quiescent current with 1 A of output current and an input-output differential of 5 V is therefore only 30 mA. Higher quiescent currents only exist when the regulator is in the dropout mode (VIN − VOUT ≤ 3 V).
Designed also for vehicular applications, the LM2940-N and LM2940C and all regulated circuitry are protected from reverse battery installations or 2-battery jumps. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both the internal circuits and the load. The LM2940-N and LM2940C cannot be harmed by temporary mirror-image insertion. Familiar regulator features such as short circuit and thermal overload protection are also provided.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LM2940x 1-A Low Dropout Regulator datasheet (Rev. J) | Dec. 22, 2014 |
Technical article | LDO basics: capacitor vs. capacitance | Aug. 01, 2018 | |
Technical article | LDO Basics: Preventing reverse current | Jul. 25, 2018 | |
Technical article | LDO basics: introduction to quiescent current | Jun. 20, 2018 | |
Selection guide | Low Dropout Regulators Quick Reference Guide (Rev. P) | Mar. 21, 2018 | |
Technical article | LDO basics: noise – part 1 | Jun. 14, 2017 | |
Application note | Linear power for automated industrial systems | Jan. 09, 2015 | |
More literature | Die D/S LM2940-5.0 MD8 1A Low Dropout Adjustable Regulator | Dec. 20, 2012 | |
Application note | Linear and Switching Voltage Regulator Fundamental Part 1 | Mar. 21, 2007 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- 1080p HD display using DLP4710
- Digital controller for the DLP4710 DMD, DLPC3439
- PMIC/LED driver for the DLP4710 DMD and DLPC3439 controller, DLPA3005
- Production ready RGB LED optical engine from YoungOptics
- DLP4710, DLPC3439 Configuration and Support Firmware
Description
The LMG34XX-BB-EVM is an easy to use breakout board to configure any LMG341x half bridge board, such as the LMG3410-HB-EVM, as a synchronous buck converter. By providing a power stage, bias power and logic circuitry this EVM allows for quick measurements of the GaN device switching. This EVM is (...)
Features
- Input voltage operates up to 600 V
- Simple open loop design to evaluate half-bridge performance of LMG341x daughter cards
- Single PWM input on board for PWM signal with 50 ns dead time
- Convenient probe points for logic and power stage measurements with oscilloscope probes that have short ground spring (...)
Description
The TPA3251EVM Ultra-HD evaluation module demonstrates the TPA3251 integrated circuit from Texas Instruments. The TPA3251 is a high-performance Class-D amplifier that enables true premium sound quality with high efficiency Class-D technology. It features an advanced integrated feedback design and (...)
Features
- Supports Post-Filter Feedback
- Self-contained protection system (short circuit, clip and thermal)
- Standard 2VRMS differential input or single ended line input
- BTL, PBTL and SE output configurations support
- Double-sided, plated-through, 2oz. Cu 2 layer PCB layout
- Supports Audio Plug-In Boards through its (...)
Design tools & simulation
Reference designs
Design files
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download Low Voltage, 50A Sensorless-FOC for Brushless DC BOM.pdf (31KB) -
download Low Voltage, 50A Sensorless-FOC for Brushless DC Assembly Drawing.pdf (210KB) -
download Low Voltage, 50A Sensorless-FOC for Brushless DC PCB.pdf (2386KB) -
download Low Voltage, 50A Sensorless-FOC for Brushless DC CAD Files.zip (1338KB) -
download Low Voltage, 50A Sensorless-FOC for Brushless DC Gerber.zip (312KB)
Design files
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download TIDA-01226 Assembly Drawing DLPDLCR4710EVM-G2.pdf (185KB) -
download TIDA-01226 Layout DLPDLCR4710EVM-G2.zip (642KB) -
download TIDA-01226 Mechanical DLPDLCR4710EVM .zip (1788KB) -
download TIDA-01226 Gerber DLPDLCR4710EVM-G2.zip (1788KB) -
download TIDA-01226 Mechanical Step File DLPDLCR4710EVM-G2.zip (7554KB) -
download TIDA-01226 BOM DLPDLCR4710EVM-G2 (Rev. A).pdf (230KB)
Design files
-
download TIDA-00874 BOM.pdf (318KB) -
download TIDA-00874 BOM.zip (318KB) -
download TIDA-00874 Assembly Drawing.pdf (595KB) -
download TIDA-00874 PCB.pdf (867KB) -
download TIDA-00874 CAD Files.zip (2132KB) -
download TIDA-00874 Gerber.zip (1764KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
(NEB) | 3 | View options |
DDPAK/TO-263 (KTT) | 3 | View options |
SOT-223 (DCY) | 4 | View options |
TO-220 (NDE) | 3 | View options |
WSON (NGN) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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Support & training
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