LM2991

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Einstellbarer negativer Low-Dropout-Spannungsregler, 1 A, mit Aktivierung

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Datenblatt

document-pdfAcrobat LM2991 Negative Low-Dropout Adjustable Regulator datasheet (Rev. I) (Englisch) PDF | HTML

LM2991

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Output options

Adjustable Output

Iout (max) (A)

1

Vin (max) (V)

0.3

Vin (min) (V)

-26

Vout (max) (V)

-3

Vout (min) (V)

-24

Rating

Catalog

Noise (µVrms)

200

PSRR at 100 KHz (dB)

22

Iq (typ) (mA)

0.7

Thermal resistance θJA (°C/W)

28

Load capacitance (min) (µF)

1

Regulated outputs (#)

1

Features

Enable

Accuracy (%)

5

Dropout voltage (Vdo) (typ) (mV)

600

Operating temperature range (°C)

-40 to 125

Output options

Adjustable Output

Iout (max) (A)

1

Vin (max) (V)

0.3

Vin (min) (V)

-26

Vout (max) (V)

-3

Vout (min) (V)

-24

Rating

Catalog

Noise (µVrms)

200

PSRR at 100 KHz (dB)

22

Iq (typ) (mA)

0.7

Thermal resistance θJA (°C/W)

28

Load capacitance (min) (µF)

1

Regulated outputs (#)

1

Features

Enable

Accuracy (%)

5

Dropout voltage (Vdo) (typ) (mV)

600

Operating temperature range (°C)

-40 to 125

TO-220 (KC)

5

45.212 mm² 10.16 x 4.45

TO-220 (NDH)

5

86.0552 mm² 10.16 x 8.47

TO-263 (KTT)

5

154.8384 mm² 10.16 x 15.24

Output Voltage Adjustable from −3 V to −24 V, Typically −2 V to −25 V
Output Current in Excess of 1 A
Dropout Voltage Typically 0.6 V at 1-A Load
Low Quiescent Current
Internal Short Circuit Current Limit
Internal Thermal Shutdown With Hysteresis
TTL, CMOS Compatible ON/OFF Switch
Functional Complement to the LM2941 Series

Output Voltage Adjustable from −3 V to −24 V, Typically −2 V to −25 V
Output Current in Excess of 1 A
Dropout Voltage Typically 0.6 V at 1-A Load
Low Quiescent Current
Internal Short Circuit Current Limit
Internal Thermal Shutdown With Hysteresis
TTL, CMOS Compatible ON/OFF Switch
Functional Complement to the LM2941 Series

The LM2991 is a low dropout adjustable negative regulator with a output voltage range between −3 V to −24 V. The LM2991 provides up to 1 A of load current and features a ON /OFF pin for remote shutdown capability.

The LM2991 uses new circuit design techniques to provide a low dropout voltage, low quiescent current and low temperature coefficient precision reference. The dropout voltage at 1-A load current is typically 0.6 V and an ensured worst-case maximum of 1 V over the entire operating temperature range. The quiescent current is typically 1 mA with a 1-A load current and an input-output voltage differential greater than 3 V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropout mode (V_OUT − V_IN ≤ 3 V).

The LM2991 is short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when inadvertently overloaded for extended periods. The LM2991 is available in 5-lead TO-220 and DDPAK/TO-263 packages and is rated for operation over the automotive temperature range of −40°C to +125°C. Mil-Aero versions are also available.

The LM2991 is a low dropout adjustable negative regulator with a output voltage range between −3 V to −24 V. The LM2991 provides up to 1 A of load current and features a ON /OFF pin for remote shutdown capability.

The LM2991 uses new circuit design techniques to provide a low dropout voltage, low quiescent current and low temperature coefficient precision reference. The dropout voltage at 1-A load current is typically 0.6 V and an ensured worst-case maximum of 1 V over the entire operating temperature range. The quiescent current is typically 1 mA with a 1-A load current and an input-output voltage differential greater than 3 V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropout mode (V_OUT − V_IN ≤ 3 V).

The LM2991 is short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when inadvertently overloaded for extended periods. The LM2991 is available in 5-lead TO-220 and DDPAK/TO-263 packages and is rated for operation over the automotive temperature range of −40°C to +125°C. Mil-Aero versions are also available.

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Alle anzeigen 4

	Typ	Titel		Datum
*	Data sheet	LM2991 Negative Low-Dropout Adjustable Regulator datasheet (Rev. I)	PDF \| HTML	03 Okt 2016
	More literature	Die D/S LM2991 MD8 MCD2730A Negative Low Dropout Adjustable Regulator		20 Dez 2012
	More literature	Die D/S LM2991 MDC Negative Low Dropout Adj Regulator		20 Sep 2012
	Application note	Linear and Switching Voltage Regulator Fundamental Part 1		21 Mär 2007

Design und Entwicklung

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Gehäuse	Pins	CAD-Symbole, Footprints und 3D-Modelle
TO-220 (KC)	5	Ultra Librarian
TO-220 (NDH)	5	Ultra Librarian
TO-263 (KTT)	5	Ultra Librarian

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LM2991

Einstellbarer negativer Low-Dropout-Spannungsregler, 1 A, mit Aktivierung

LM2991

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