LP3905

AKTIV

Power-Management-IC (PMIC) für energieeffiziente Handheld-Anwendungen

Produktdetails

Regulated outputs (#) 4 Configurability Factory programmable, Hardware configurable Vin (min) (V) 3 Vin (max) (V) 5.5 Vout (min) (V) 1 Vout (max) (V) 3.3 Iout (max) (A) 0.6 Features Enable pin, Overcurrent protection, Thermal shutdown Step-up DC/DC converter 0 Step-down DC/DC converter 2 Step-down DC/DC controller 0 Step-up DC/DC controller 0 LDO 2 Iq (typ) (mA) 0.14 Rating Catalog Switching frequency (max) (kHz) 2000 Operating temperature range (°C) -40 to 85 Shutdown current (ISD) (typ) (µA) 6.5 Switching frequency (typ) (kHz) 2000
Regulated outputs (#) 4 Configurability Factory programmable, Hardware configurable Vin (min) (V) 3 Vin (max) (V) 5.5 Vout (min) (V) 1 Vout (max) (V) 3.3 Iout (max) (A) 0.6 Features Enable pin, Overcurrent protection, Thermal shutdown Step-up DC/DC converter 0 Step-down DC/DC converter 2 Step-down DC/DC controller 0 Step-up DC/DC controller 0 LDO 2 Iq (typ) (mA) 0.14 Rating Catalog Switching frequency (max) (kHz) 2000 Operating temperature range (°C) -40 to 85 Shutdown current (ISD) (typ) (µA) 6.5 Switching frequency (typ) (kHz) 2000
WSON (NHL) 14 16 mm² 4 x 4
  • Two Buck Regulators for Powering High Current Processor Functions or Peripheral Devices
  • Two Linear Regulators for Powering Internal Processor Functions and I/Os
  • One Enable Pin for Buck1 and Linear Regulators 1 and 2
  • Separate Enable Pin for Buck2
  • Thermal and Current Overload Protection
  • Small 14–Pin WSON Package (4x4mmx0.8mm)

Key Specifications

  • Buck Regulators
    • Fixed and Adjustable Voltage Options, Range 1.0V to 3.3V(1)
    • Up to 90% Efficiency
    • Auto-Switching PFM-PWM Mode and Fixed PWM Mode
    • 2MHz PWM Fixed Switching Frequency (Typ)
    • 600mA Output Current
    • ±4% Output Voltage Accuracy Over Temp
    • Internal SoftStart
    • 2.2µH Inductor, 10µF Input and Output Caps
  • Linear Regulators
    • Output Options in the Range 1.5V to 3.3V
    • 13.5µVrms Output Voltage Noise
    • PSRR - 70dB @ 1kHz
    • ±3% Output Voltage Accuracy Over Full Line and Load Regulation
    • 0mA to 150mA Output Current
    • Cin = 1.0µF, Cout = 0.47µF for 100mA O/P
    • Cin = 1.0µF, Cout = 1.0µF for 150mA O/P
    • 80mV Dropout Voltage
  • Two Buck Regulators for Powering High Current Processor Functions or Peripheral Devices
  • Two Linear Regulators for Powering Internal Processor Functions and I/Os
  • One Enable Pin for Buck1 and Linear Regulators 1 and 2
  • Separate Enable Pin for Buck2
  • Thermal and Current Overload Protection
  • Small 14–Pin WSON Package (4x4mmx0.8mm)

Key Specifications

  • Buck Regulators
    • Fixed and Adjustable Voltage Options, Range 1.0V to 3.3V(1)
    • Up to 90% Efficiency
    • Auto-Switching PFM-PWM Mode and Fixed PWM Mode
    • 2MHz PWM Fixed Switching Frequency (Typ)
    • 600mA Output Current
    • ±4% Output Voltage Accuracy Over Temp
    • Internal SoftStart
    • 2.2µH Inductor, 10µF Input and Output Caps
  • Linear Regulators
    • Output Options in the Range 1.5V to 3.3V
    • 13.5µVrms Output Voltage Noise
    • PSRR - 70dB @ 1kHz
    • ±3% Output Voltage Accuracy Over Full Line and Load Regulation
    • 0mA to 150mA Output Current
    • Cin = 1.0µF, Cout = 0.47µF for 100mA O/P
    • Cin = 1.0µF, Cout = 1.0µF for 150mA O/P
    • 80mV Dropout Voltage

LP3905 is a multi-functional Power Management Unit, optimized for low power handheld applications. This device integrates two 600mA DC-DC buck regulators and two 150mA linear regulators. Fixed and adjustable buck output versions are available. The LP3905 additionally features two enable pins for the device output control and is offered in an WSON package.

LP3905 is a multi-functional Power Management Unit, optimized for low power handheld applications. This device integrates two 600mA DC-DC buck regulators and two 150mA linear regulators. Fixed and adjustable buck output versions are available. The LP3905 additionally features two enable pins for the device output control and is offered in an WSON package.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LP3905 Power Management Unit For Low Power Handheld Applications datasheet (Rev. D) 03 Mai 2013
EVM User's guide AN-1501 LP3905-30 Evaluation Board Information (Rev. A) 30 Apr 2013
User guide AN-1527 LP3905-A3 Application Board Information (Rev. B) 30 Apr 2013

Design und Entwicklung

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