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两个直流/直流转换器和一个 LDO 可配置 PMIC
Regulated outputs (#) 3
Vin (Min) (V) 3
Vin (Max) (V) 5.5
Iout (Max) (A) 2
Rating Catalog
LDO 1
Features Enable, Over Current Protection, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO Fixed
Processor name Generic
Processor supplier Generic
Shutdown current (ISD) (Typ) (uA) 0.03
Switching frequency (Typ) (kHz) 2000
Configurability Hardware configurable
  • Step-Down DC/DC Converter (Buck)
    • 3.0–5.5V Input Range
    • Externally Adjustable VOUT:
    • Bucks 1 & 2: 0.8V–3.5V @ 2A
    • 180° Phase Shift Between Bucks Clocks
    • 2 MHz PWM Switching Frequency
    • ±1% feedback Voltage Accuracy
    • Automatic Soft Start
    • Current Overload Protection
    • PWM/PFM efficiency Modes Available
  • Linear Regulator (LDO) Controller
    • 3.0V–5.5V Input Range
    • Externally Adjustable VOUT
    • ±1.5% Feedback Voltage Accuracy
    • Regulated to Low VIN - Low VOUT LI-LO (Low Input Low Output) NFET Operation
    • Input to the LI-LO Configuration, Can Be Post Regulated When Supply is Regulated by Buck2
    • Up to 1000 mA Output Current by Selection of External FET

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The LM26484 is a multi-function, configurable Power Management Unit. This device integrates two highly efficient 2.0A Step-Down DC/DC converters, one LDO Controller, a POR (Power On Reset) circuit, and thermal overload protection circuitry. All regulator output voltages are externally adjustable. The LDO controller is a low-voltage NMOS voltage regulator. The LM26484 is offered in a 5 x 4 x 0.8 mm WQFN-24 pin package.