300-mA, low-dropout voltage regulator with enable
Product details
Parameters
Package | Pins | Size
Features
- Input Voltage From 1.65 V to 4 V
- Output Voltage From 0.8 V to 3 V
- 1% Accuracy at Room Temperature
- 125-mV Dropout at 300-mA Load
- 50-µA Quiescent Current at 1-mA Load
- Inrush Current Controlled to 600 mA
- PSRR 65 dB at 1 kHz
- 100-µs Start-Up Time for 1.5-V VOUT
- Stable With Ceramic Capacitors as Small as 0402
- Thermal-Overload and Short-Circuit Protection
Description
Operating from a minimum input voltage of 1.65 V, the LP3991 LDO has been designed to provide fixed stable output voltages for load currents up to 300 mA. This device is suitable where accurate low voltages are required from low input voltage sources and is therefore suitable for post regulation of switched mode regulators. In such applications, significant improvements in performance and EMI can be realized, with little reduction in overall efficiency. The LP3991 provides fixed outputs as low as 1.2 V from a wide input range from 1.65 V to 4 V Using the enable (EN) pin, the device may be controlled to provide a shutdown state, in which negligible supply current is drawn.
The LP3991 is designed to be stable with space-saving ceramic capacitors as small as 0402 case size.
Performance is specified for a –40°C to +125°C junction temperature range. For output voltage options, contact your local Texas Instruments sales office.
For all available packages, see the orderable addendum at the end of the datasheet.Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LP3991 300-mA LDO for Digital Applications datasheet (Rev. J) | Jun. 15, 2016 |
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 | |
Technical article | LDO basics: noise – part 1 | Jun. 14, 2017 | |
Selection guide | TI Components for Aerospace and Defense Guide (Rev. E) | Mar. 22, 2017 | |
User guide | AN-1416 LP3991TL DSBGA Evaluation Board Information (Rev. B) | Apr. 30, 2013 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The LP3991 is a 300mA Linear Voltage Regulator for Digital Applications. Operating from a minimum input voltage of 1.65V, the LP3991 regulator has been designed to provide fixed stable output voltages for load currents up to 300mA. This device is suitable where accurate, low voltages are required (...)
Features
- Operation from 1.65V to 3.6V Input
- 1% accuracy at room temperature
- Output Voltage from 1.2V to 2.8V
- 125mV Dropout at 300mA load
- 50 µA Quiescent Current at 1mA Load
- Inrush Current controlled to 600mA
- PSRR 65dB at 1kHz
- 100 µs Start-Up time for 1.5VOUT
- Stable with Ceramic capacitors as small as 0402
- (...)
Reference designs
Design files
-
download PMP10601 BOM.pdf (123KB) -
download PMP10601 Gerber.zip (9147KB)
Design files
-
download PMP10630 BOM.pdf (96KB) -
download PMP10630 PCB.pdf (604KB) -
download PMP10630 Gerber.zip (406KB)
Design files
-
download PMP10600 BOM.pdf (123KB) -
download PMP10600 Gerber.zip (9189KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
DSBGA (YZR) | 4 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
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- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
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