LP38869

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1-A-Spannungsregler mit hohem PSRR und extrem niedrigem Dropout und Aktivierung

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Datenblatt

document-pdfAcrobat LP38869 1A FlexCap, Low-Dropout Linear Reg w/ 0.75% Accuracy datasheet (Rev. B) (Englisch)

LP38869

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Output options

Fixed Output

Iout (max) (A)

1

Vin (max) (V)

5.5

Vin (min) (V)

2.7

Vout (max) (V)

2.5

Vout (min) (V)

2.5

Fixed output options (V)

2.5

Noise (µVrms)

50

Iq (typ) (mA)

0.6

Thermal resistance θJA (°C/W)

141

Rating

Catalog

Load capacitance (min) (µF)

1

Regulated outputs (#)

1

Features

Enable, Soft start

Accuracy (%)

2

PSRR at 100 KHz (dB)

50

Dropout voltage (Vdo) (typ) (mV)

200

Operating temperature range (°C)

-40 to 125

Output options

Fixed Output

Iout (max) (A)

1

Vin (max) (V)

5.5

Vin (min) (V)

2.7

Vout (max) (V)

2.5

Vout (min) (V)

2.5

Fixed output options (V)

2.5

Noise (µVrms)

50

Iq (typ) (mA)

0.6

Thermal resistance θJA (°C/W)

141

Rating

Catalog

Load capacitance (min) (µF)

1

Regulated outputs (#)

1

Features

Enable, Soft start

Accuracy (%)

2

PSRR at 100 KHz (dB)

50

Dropout voltage (Vdo) (typ) (mV)

200

Operating temperature range (°C)

-40 to 125

HTSSOP (PWP)

16

32 mm² 5 x 6.4

Operating Input Supply Range: +2.7V to + 5.5V
Maximum Continuous Output Current: 1A
Preset Output Voltage of 2.5V, or Adjustable Output Voltage From 0.8V to 5.0V
Pre-Set Output Initial V_OUT Tolerance ±0.5%
Adjustable V_REF Tolerance of ±0.75%
PSRR of 50dB at 100kHz
Low 200 mV Dropout at 1A
Typical 2 µA Supply Current in Shutdown Mode
Adjustable Soft-Start for Output Current
Fold-Back Output Current Limit
Stable With Ceramic, Tantalum, or Aluminum Capacitors
Stable With 1uF Input/Output Capacitors
Thermal Shutdown
16-pin HTSSOP Package

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Operating Input Supply Range: +2.7V to + 5.5V
Maximum Continuous Output Current: 1A
Preset Output Voltage of 2.5V, or Adjustable Output Voltage From 0.8V to 5.0V
Pre-Set Output Initial V_OUT Tolerance ±0.5%
Adjustable V_REF Tolerance of ±0.75%
PSRR of 50dB at 100kHz
Low 200 mV Dropout at 1A
Typical 2 µA Supply Current in Shutdown Mode
Adjustable Soft-Start for Output Current
Fold-Back Output Current Limit
Stable With Ceramic, Tantalum, or Aluminum Capacitors
Stable With 1uF Input/Output Capacitors
Thermal Shutdown
16-pin HTSSOP Package

All trademarks are the property of their respective owners.

The LP38869 low-dropout linear regulator operates with an input voltage supply from +2.7V to +5.5V input, and delivers a specified 1A load current with a low 200 mV dropout. The high 50 dB PSRR at 100 kHz results from a high gain control loop that also yields excellent transient response. Coupled with a high accuracy output voltage, ±0.75 % over temperature, the LP38869 is an ideal power supply for FPGAs, DSPs or MCUs. Output voltage is preset at +2.5V, or may be adjustable between +0.8V to +5V with an external resistor divider.

The LP38869 only needs 1 μF output capacitance for stability. The FlexCap compensation allows the use of any type of output capacitor, regardless of ESR. Other features include: Soft-Start; delayed reset output; low-power shutdown; short-circuit protection; and thermal shutdown protection

Ground Pin Current: Typically less than 1 mA at 1A load

Shutdown Mode: Typically 2 µA quiescent current when the SHDN pin is pulled low.

Simplified Compensation: Stable with any type of output capacitor.

The LP38869 low-dropout linear regulator operates with an input voltage supply from +2.7V to +5.5V input, and delivers a specified 1A load current with a low 200 mV dropout. The high 50 dB PSRR at 100 kHz results from a high gain control loop that also yields excellent transient response. Coupled with a high accuracy output voltage, ±0.75 % over temperature, the LP38869 is an ideal power supply for FPGAs, DSPs or MCUs. Output voltage is preset at +2.5V, or may be adjustable between +0.8V to +5V with an external resistor divider.

The LP38869 only needs 1 μF output capacitance for stability. The FlexCap compensation allows the use of any type of output capacitor, regardless of ESR. Other features include: Soft-Start; delayed reset output; low-power shutdown; short-circuit protection; and thermal shutdown protection

Ground Pin Current: Typically less than 1 mA at 1A load

Shutdown Mode: Typically 2 µA quiescent current when the SHDN pin is pulled low.

Simplified Compensation: Stable with any type of output capacitor.

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Alle anzeigen 2

	Typ	Titel		Datum
*	Data sheet	LP38869 1A FlexCap, Low-Dropout Linear Reg w/ 0.75% Accuracy datasheet (Rev. B)		08 Apr 2013
	Application note	AN-2261 LP38869EVAL - 800mA LDO with High PSRR and Low Noise (Rev. A)		24 Apr 2013

Design und Entwicklung

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LP38869

1-A-Spannungsregler mit hohem PSRR und extrem niedrigem Dropout und Aktivierung

LP38869

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