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Linear & low-dropout (LDO) regulators

LP38869

ACTIVE

1-A, high-PSRR, ultra-low-dropout voltage regulator with enable

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Data sheet

LP38869

ACTIVE
Data sheet Order now

Product details

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 Rating Catalog Noise (µVrms) 50 PSRR at 100 KHz (dB) 50 Iq (typ) (mA) 0.6 Thermal resistance θJA (°C/W) 141 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Soft start Accuracy (%) 2 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 Rating Catalog Noise (µVrms) 50 PSRR at 100 KHz (dB) 50 Iq (typ) (mA) 0.6 Thermal resistance θJA (°C/W) 141 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Soft start Accuracy (%) 2 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 VOUT Tolerance ±0.5%
  • Adjustable VREF 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 VOUT Tolerance ±0.5%
  • Adjustable VREF 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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Type Title Date
* 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

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