LP3997

ACTIVE

250-mA, low-dropout voltage regulator with power good & enable

Product details

Output options Fixed Output Iout (max) (A) 0.25 Vin (max) (V) 6 Vin (min) (V) 2 Vout (max) (V) 3.3 Vout (min) (V) 3.3 Fixed output options (V) 3.3 Noise (µVrms) 100 Iq (typ) (mA) 0.055 Thermal resistance θJA (°C/W) 210 Rating Catalog Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 3 PSRR at 100 KHz (dB) 35 Dropout voltage (Vdo) (typ) (mV) 140 Operating temperature range (°C) -40 to 125
Output options Fixed Output Iout (max) (A) 0.25 Vin (max) (V) 6 Vin (min) (V) 2 Vout (max) (V) 3.3 Vout (min) (V) 3.3 Fixed output options (V) 3.3 Noise (µVrms) 100 Iq (typ) (mA) 0.055 Thermal resistance θJA (°C/W) 210 Rating Catalog Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 3 PSRR at 100 KHz (dB) 35 Dropout voltage (Vdo) (typ) (mV) 140 Operating temperature range (°C) -40 to 125
VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Low 140-mV Dropout at 250-mA Load
  • Stable With Ceramic Capacitor.
  • Low Noise With Bypass Capacitor
  • Less Than 80 µA Typical IQ at 250 mA
  • Virtually Zero IQ (Disabled)
  • Thermal and Short Circuit Protection
  • 3.3-V Output For other voltage options, contact your TI sales office
  • 8-Lead VSSOP Package For other package options, contact your TI sales office.

All trademarks are the property of their respective owners.

  • Low 140-mV Dropout at 250-mA Load
  • Stable With Ceramic Capacitor.
  • Low Noise With Bypass Capacitor
  • Less Than 80 µA Typical IQ at 250 mA
  • Virtually Zero IQ (Disabled)
  • Thermal and Short Circuit Protection
  • 3.3-V Output For other voltage options, contact your TI sales office
  • 8-Lead VSSOP Package For other package options, contact your TI sales office.

All trademarks are the property of their respective owners.

The LP3997 regulator is designed to meet the requirements of portable, battery-powered systems, providing accurate output voltage, low noise, and low quiescent current. The LP3997 provides 3.3V output at up to 250mA load current. The chip architecture is capable of providing output voltages as low as 0.8V. When switched in shutdown mode, the power consumption is virtually zero.

The LP3997 is designed to be stable with space saving ceramic output capacitor as small as 1µF.

The LP3997 also includes an out-of-regulation error flag. When the output is more than 5% below its nominal voltage, the error flag sets to low. If a capacitor is connected to device’s delay pin, a delayed power-on reset signal will be generated.

The LP3997 regulator is designed to meet the requirements of portable, battery-powered systems, providing accurate output voltage, low noise, and low quiescent current. The LP3997 provides 3.3V output at up to 250mA load current. The chip architecture is capable of providing output voltages as low as 0.8V. When switched in shutdown mode, the power consumption is virtually zero.

The LP3997 is designed to be stable with space saving ceramic output capacitor as small as 1µF.

The LP3997 also includes an out-of-regulation error flag. When the output is more than 5% below its nominal voltage, the error flag sets to low. If a capacitor is connected to device’s delay pin, a delayed power-on reset signal will be generated.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 2
Type Title Date
* Data sheet LP3997 Micropower 250mA CMOS LDO Regulator with Error Flag / Power-On-Reset datasheet (Rev. B) 03 May 2013
Application note AN-2146 Power Design for SDI and Other Noise-Sensitive Devices (Rev. A) 26 Apr 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Package Pins Download
VSSOP (DGK) 8 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos