LP38851

ACTIVO

Regulador de voltaje ajustable de 800 mA y baja VIN (0,915 V), de caída ultrabaja, con habilitación

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Hoja de datos

document-pdfAcrobat 800 mA Fast-Response High-Accuracy Adj LDO Linear Reg w/ Enable & Soft-Start datasheet (Rev. C) (Inglés)

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LP38851

ACTIVO

Hoja de datos

Haga su pedido ahora

Detalles del producto

Rating

Catalog

Vin (max) (V)

5.5

Vin (min) (V)

0.915

Iout (max) (A)

0.8

Output options

Adjustable Output

Vout (max) (V)

1.8

Vout (min) (V)

0.8

Noise (µVrms)

90

PSRR at 100 KHz (dB)

50

Iq (typ) (mA)

10

Features

Enable, Soft start

Thermal resistance θJA (°C/W)

60

Load capacitance (min) (µF)

10

Regulated outputs (#)

1

Accuracy (%)

2

Dropout voltage (Vdo) (typ) (mV)

115

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Vin (max) (V)

5.5

Vin (min) (V)

0.915

Iout (max) (A)

0.8

Output options

Adjustable Output

Vout (max) (V)

1.8

Vout (min) (V)

0.8

Noise (µVrms)

90

PSRR at 100 KHz (dB)

50

Iq (typ) (mA)

10

Features

Enable, Soft start

Thermal resistance θJA (°C/W)

60

Load capacitance (min) (µF)

10

Regulated outputs (#)

1

Accuracy (%)

2

Dropout voltage (Vdo) (typ) (mV)

115

Operating temperature range (°C)

-40 to 125

HSOIC (DDA)

8

29.4 mm² 4.9 x 6

TO-220 (NDZ)

7

82.6008 mm² 10.16 x 8.13

TO-263 (KTW)

7

153.924 mm² 10.1 x 15.24

Adjustable V_OUT Range of 0.80V to 1.8V
Wide V_BIAS Supply Operating Range of 3.0V to 5.5V
Stable with 10µF Ceramic Capacitors
Dropout Voltage of 115 mV (Typical) at 800 mA Load Current
Precision V_ADJ across All Line and Load Conditions:
- ±1.5% V_ADJ for T_J = 25°C
- ±2.0% V_ADJ for 0°C ≤ T_J ≤ +125°C
- ±3.0% V_ADJ for -40°C ≤ T_J ≤ +125°C
Over-Temperature and Over-Current Protection
Available in 8-Lead SO PowerPad,
7-Lead SFM and 7-Lead PFM Packages
−40°C to +125°C Operating Junction Temperature Range

All trademarks are the property of their respective owners.

Adjustable V_OUT Range of 0.80V to 1.8V
Wide V_BIAS Supply Operating Range of 3.0V to 5.5V
Stable with 10µF Ceramic Capacitors
Dropout Voltage of 115 mV (Typical) at 800 mA Load Current
Precision V_ADJ across All Line and Load Conditions:
- ±1.5% V_ADJ for T_J = 25°C
- ±2.0% V_ADJ for 0°C ≤ T_J ≤ +125°C
- ±3.0% V_ADJ for -40°C ≤ T_J ≤ +125°C
Over-Temperature and Over-Current Protection
Available in 8-Lead SO PowerPad,
7-Lead SFM and 7-Lead PFM Packages
−40°C to +125°C Operating Junction Temperature Range

All trademarks are the property of their respective owners.

The LP38851-ADJ is a high current, fast response regulator which can maintain output voltage regulation with extremely low input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: V_BIAS provides voltage to drive the gate of the N-MOS power transistor, while V_IN is the input voltage which 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 part is available in PSOP 8–pin, SFM 7–pin, and TO-263 7-pin packages.

Dropout Voltage: 115 mV (typical) at 800 mA load current
Low Ground Pin Current: 10 mA (typical) at 800 mA load current
Soft-Start: Programmable Soft-Start time
Precision ADJ Voltage: ±1.5% for T_J = 25°C, and ±2.0% for 0°C ≤ T_J ≤ +125°C, across all line and load conditions

The LP38851-ADJ is a high current, fast response regulator which can maintain output voltage regulation with extremely low input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: V_BIAS provides voltage to drive the gate of the N-MOS power transistor, while V_IN is the input voltage which 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 part is available in PSOP 8–pin, SFM 7–pin, and TO-263 7-pin packages.

Dropout Voltage: 115 mV (typical) at 800 mA load current
Low Ground Pin Current: 10 mA (typical) at 800 mA load current
Soft-Start: Programmable Soft-Start time
Precision ADJ Voltage: ±1.5% for T_J = 25°C, and ±2.0% for 0°C ≤ T_J ≤ +125°C, across all line and load conditions

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Documentación técnica

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Documentación principal	Tipo	Título	Fecha
*	Data sheet	800 mA Fast-Response High-Accuracy Adj LDO Linear Reg w/ Enable & Soft-Start datasheet (Rev. C)	05 abr 2013
	Selection guide	Power Management Guide 2018 (Rev. R)	25 jun 2018
	Selection guide	Low Dropout Regulators Quick Reference Guide (Rev. P)	21 mar 2018
	Application note	AN-1815 LDOs Ease the Stress of Start-Up (Rev. A)	24 abr 2013

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Encapsulado	Pines	Símbolos CAD, huellas y modelos 3D
HSOIC (DDA)	8	Ultra Librarian
TO-220 (NDZ)	7	Ultra Librarian
TO-263 (KTW)	7	Ultra Librarian

Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

LP38851

Regulador de voltaje ajustable de 800 mA y baja VIN (0,915 V), de caída ultrabaja, con habilitación

Se encuentra disponible una versión más nueva de este producto

Misma funcionalidad con diferente configuración de pines que el dispositivo comparado

LP38851

Detalles del producto

Productos similares que pueden interesarle

Misma funcionalidad con diferente configuración de pines que el dispositivo comparado

Documentación técnica

Diseño y desarrollo

Pedidos y calidad

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

Serie de videos

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