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

LP2954A

AKTIV

Low-Dropout-Spannungsregler, 250 mA, 30 V mit hoher Genauigkeit

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Datenblatt

LP2954A

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Output options Adjustable Output Iout (max) (A) 0.25 Vin (max) (V) 30 Vin (min) (V) -20 Vout (max) (V) 29 Vout (min) (V) 1.23 Noise (µVrms) 80 Iq (typ) (mA) 0.21 Thermal resistance θJA (°C/W) 44 Rating Catalog Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 3 PSRR at 100 KHz (dB) 14 Dropout voltage (Vdo) (typ) (mV) 800 Operating temperature range (°C) -40 to 125
Output options Adjustable Output Iout (max) (A) 0.25 Vin (max) (V) 30 Vin (min) (V) -20 Vout (max) (V) 29 Vout (min) (V) 1.23 Noise (µVrms) 80 Iq (typ) (mA) 0.21 Thermal resistance θJA (°C/W) 44 Rating Catalog Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 3 PSRR at 100 KHz (dB) 14 Dropout voltage (Vdo) (typ) (mV) 800 Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² 4.9 x 6 TO-220 (NDE) 3 46.5328 mm² 10.16 x 4.58 TO-263 (KTT) 3 154.8384 mm² 10.16 x 15.24
  • 5-V Output within 1.2% Over Temperature
    (A Grade)
  • Adjustable 1.23-V to 29-V Output Voltage Available (LP2954IM and LP2954AIM)
  • Ensured 250-mA Output Current
  • Extremely Low Quiescent Current
  • Low Dropout Voltage
  • Reverse Battery Protection
  • Extremely Tight Line and Load Regulation
  • Very Low Temperature Coefficient
  • Current and Thermal Limiting
  • Pin Compatible with LM2940 and LM340
    (5-V Version Only)
  • Adjustable Version Adds ERROR Flag to Warn of Output Drop and a Logic-Controlled Shutdown
  • 5-V Output within 1.2% Over Temperature
    (A Grade)
  • Adjustable 1.23-V to 29-V Output Voltage Available (LP2954IM and LP2954AIM)
  • Ensured 250-mA Output Current
  • Extremely Low Quiescent Current
  • Low Dropout Voltage
  • Reverse Battery Protection
  • Extremely Tight Line and Load Regulation
  • Very Low Temperature Coefficient
  • Current and Thermal Limiting
  • Pin Compatible with LM2940 and LM340
    (5-V Version Only)
  • Adjustable Version Adds ERROR Flag to Warn of Output Drop and a Logic-Controlled Shutdown

The LP2954 is a 5-V micropower LDO with very low quiescent current (90 μA typical at 1-mA load) and very low dropout voltage (typically 60 mV at light loads and 470 mV at 250-mA load current).

The quiescent current increases only slightly at dropout (120 μA typical), which prolongs battery life.

The LP2954 with a fixed 5-V output is available in three-pin TO-220 and DDPAK/TO-263 packages. The adjustable LP2954 is provided in an 8-pin, small-outline SOIC package. The adjustable version also provides a resistor network which can be pin strapped to set the output to any voltage from to 1.23 V to 29 V.

Reverse battery protection is provided for the IN pin.

The tight line and load regulation (0.04% typical), as well as very low output temperature coefficient make the LP2954 well suited for use as a low-power voltage reference.

Output accuracy is ensured at both room temperature and over the entire operating temperature range.

For all available packages, see the orderable addendum at the end of the data sheet.

The LP2954 is a 5-V micropower LDO with very low quiescent current (90 μA typical at 1-mA load) and very low dropout voltage (typically 60 mV at light loads and 470 mV at 250-mA load current).

The quiescent current increases only slightly at dropout (120 μA typical), which prolongs battery life.

The LP2954 with a fixed 5-V output is available in three-pin TO-220 and DDPAK/TO-263 packages. The adjustable LP2954 is provided in an 8-pin, small-outline SOIC package. The adjustable version also provides a resistor network which can be pin strapped to set the output to any voltage from to 1.23 V to 29 V.

Reverse battery protection is provided for the IN pin.

The tight line and load regulation (0.04% typical), as well as very low output temperature coefficient make the LP2954 well suited for use as a low-power voltage reference.

Output accuracy is ensured at both room temperature and over the entire operating temperature range.

For all available packages, see the orderable addendum at the end of the data sheet.
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Technische Dokumentation

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* Data sheet LP2954, LP2954A 5-V and Adjustable Micropower LDOs datasheet (Rev. E) PDF | HTML 28 Jul 2016

Design und Entwicklung

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Simulationsmodell

LP2954A Unencrypted PSpice Transient Model

SNVMAB2.ZIP (2 KB) - PSpice Model
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Simulationsmodell

lp2954a PSpice Transient Model

SLVMAI9.ZIP (47 KB) - PSpice Model
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Referenzdesigns

TIDA-00181 — Isolierte Stromversorgung mit IGBT-Gate-Treiber, Gegentaktwandler und 4 Ausgängen

This reference design provides isolated positive and negative voltage rails required for Insulated Gate Bipolar Transistor (IGBT) gate drivers from a single 24-volt DC input supply. IGBTs are used in three phase inverters for variable-frequency drives to control the speed of AC motors. This (...)
Design guide: PDF
Schaltplan: PDF
Gehäuse Pins Herunterladen
SOIC (D) 8 Optionen anzeigen
TO-220 (NDE) 3 Optionen anzeigen
TO-263 (KTT) 3 Optionen anzeigen
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