LP38856

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Hochgenauer Ultra-Low-Dropout-Spannungsregler, 3 A, niedrige VIN (1,15 V) mit Aktivierung

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Datenblatt

document-pdfAcrobat LP38856 3-A Fast-Response High-Accuracy LDO Linear Regulator With Enable datasheet (Rev. F) (Englisch) PDF | HTML

LP38856

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Output options

Fixed Output

Iout (max) (A)

3

Vin (max) (V)

5.5

Vin (min) (V)

1.15

Vout (max) (V)

1.2

Vout (min) (V)

0.8

Fixed output options (V)

0.8, 1.2

Rating

Catalog

Noise (µVrms)

150

PSRR at 100 KHz (dB)

37

Iq (typ) (mA)

10

Thermal resistance θJA (°C/W)

32

Load capacitance (min) (µF)

10

Regulated outputs (#)

1

Features

Enable

Accuracy (%)

1

Dropout voltage (Vdo) (typ) (mV)

240

Operating temperature range (°C)

-40 to 125

Output options

Fixed Output

Iout (max) (A)

3

Vin (max) (V)

5.5

Vin (min) (V)

1.15

Vout (max) (V)

1.2

Vout (min) (V)

0.8

Fixed output options (V)

0.8, 1.2

Rating

Catalog

Noise (µVrms)

150

PSRR at 100 KHz (dB)

37

Iq (typ) (mA)

10

Thermal resistance θJA (°C/W)

32

Load capacitance (min) (µF)

10

Regulated outputs (#)

1

Features

Enable

Accuracy (%)

1

Dropout voltage (Vdo) (typ) (mV)

240

Operating temperature range (°C)

-40 to 125

TO-220 (NDH)

5

86.0552 mm² 10.16 x 8.47

TO-263 (KTT)

5

154.8384 mm² 10.16 x 15.24

Input Voltage: 1.1 V to 5.5 V
Wide V_BIAS Supply Operating
Range: 3 V to 5.5 V
Standard V_OUT: 0.8 V and 1.2 V
Stable with 10-µF Ceramic Capacitors
Dropout Voltage of 240 mV (Typical) at 3-A
Load Current
Precision Output Voltage Across All Line and
Load Conditions:
- ±1% for T_J = 25°C
- ±2% for 0°C ≤ T_J ≤ +125°C
- ±3% for –40°C ≤ T_J ≤ +125°C
Overtemperature and Overcurrent Protection
–40°C to +125°C Operating Temperature Range

Input Voltage: 1.1 V to 5.5 V
Wide V_BIAS Supply Operating
Range: 3 V to 5.5 V
Standard V_OUT: 0.8 V and 1.2 V
Stable with 10-µF Ceramic Capacitors
Dropout Voltage of 240 mV (Typical) at 3-A
Load Current
Precision Output Voltage Across All Line and
Load Conditions:
- ±1% for T_J = 25°C
- ±2% for 0°C ≤ T_J ≤ +125°C
- ±3% for –40°C ≤ T_J ≤ +125°C
Overtemperature and Overcurrent Protection
–40°C to +125°C Operating Temperature Range

The LP38856 is a high-current, fast-response regulator which can maintain output voltage regulation with an extremely low input-to-output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: V_BIAS provides power for the internal bias and control circuits, as well as drive for the gate of the N-MOS power transistor, while V_IN supplies power to the load. The use of an external bias rail allows the part to operate from ultra-low V_IN voltages. Unlike bipolar regulators, the CMOS architecture consumes extremely low quiescent current at any output load current. The use of an N-MOS power transistor results in wide bandwidth, yet minimum external capacitance is required to maintain loop stability.

The fast transient response of this device makes it suitable for use in powering DSP, microcontroller core voltages, and switch mode power supply post regulators. The LP38856 is available in 5-pin TO-220 and DDPAK/TO-263 packages.

Dropout Voltage: 240 mV (typical) at 3-A load current.
Low Ground Pin Current: 10 mA (typical) at 3-A load current.
Shutdown Current: 1 µA (typical) I_IN(GND) when EN pin is low.
Precision Output Voltage: ±1% for T_J = 25°C and ±2% for 0°C ≤ T_J ≤ +125°C, across all line and load conditions.

The LP38856 is a high-current, fast-response regulator which can maintain output voltage regulation with an extremely low input-to-output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: V_BIAS provides power for the internal bias and control circuits, as well as drive for the gate of the N-MOS power transistor, while V_IN supplies power to the load. The use of an external bias rail allows the part to operate from ultra-low V_IN voltages. Unlike bipolar regulators, the CMOS architecture consumes extremely low quiescent current at any output load current. The use of an N-MOS power transistor results in wide bandwidth, yet minimum external capacitance is required to maintain loop stability.

The fast transient response of this device makes it suitable for use in powering DSP, microcontroller core voltages, and switch mode power supply post regulators. The LP38856 is available in 5-pin TO-220 and DDPAK/TO-263 packages.

Dropout Voltage: 240 mV (typical) at 3-A load current.
Low Ground Pin Current: 10 mA (typical) at 3-A load current.
Shutdown Current: 1 µA (typical) I_IN(GND) when EN pin is low.
Precision Output Voltage: ±1% for T_J = 25°C and ±2% for 0°C ≤ T_J ≤ +125°C, across all line and load conditions.

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Alle anzeigen 4

	Typ	Titel		Datum
*	Data sheet	LP38856 3-A Fast-Response High-Accuracy LDO Linear Regulator With Enable datasheet (Rev. F)	PDF \| HTML	27 Aug 2015
	Selection guide	Power Management Guide 2018 (Rev. R)		25 Jun 2018
	Selection guide	Low Dropout Regulators Quick Reference Guide (Rev. P)		21 Mär 2018
	EVM User's guide	AN-1479 LP38856S-1.2 Evaluation Board (Rev. B)		24 Apr 2013

Design und Entwicklung

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

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LP38856

Hochgenauer Ultra-Low-Dropout-Spannungsregler, 3 A, niedrige VIN (1,15 V) mit Aktivierung

LP38856

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