Startseite Energiemanagement Linear- und Low-Dropout-Regler (LDO)

LP3997

AKTIV

Low-Dropout-Spannungsregler, 250 mA, mit Power-Good- und Aktivierungsfunktion

Produktdetails

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 Rating Catalog Noise (µVrms) 100 PSRR at 100 KHz (dB) 35 Iq (typ) (mA) 0.055 Thermal resistance θJA (°C/W) 210 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 3 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 Rating Catalog Noise (µVrms) 100 PSRR at 100 KHz (dB) 35 Iq (typ) (mA) 0.055 Thermal resistance θJA (°C/W) 210 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 3 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.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LP3997 Micropower 250mA CMOS LDO Regulator with Error Flag / Power-On-Reset datasheet (Rev. B) 03 Mai 2013
Application note AN-2146 Power Design for SDI and Other Noise-Sensitive Devices (Rev. A) 26 Apr 2013

Design und Entwicklung

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