MPM3840

Active
4A, 5.5V, Synchronous Step-down Power Module with Integrated Inductor and Power Good

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Product Description

The MPM3840 is a monolithic, step-down, switch-mode converter with built-in, internal power MOSFETs and an inductor. The MPM3840 can provide 4A of continuous output current from a 2.8V to 5.5V input voltage with excellent load and line regulation. The MPM3840 is ideal for powering portable equipment that run on a single-cell Lithium-ion (Li+) battery. The output voltage can be regulated as low as 0.6V. Only input capacitors, output capacitors, and feedback (FB) resistors are required to complete the design. The constant-on-time (COT) control scheme provides a fast transient response, high light­load efficiency, and easy loop stabilization. Full protection features include cycle­by­cycle current limiting and thermal shutdown. The MPM3840 requires a minimal number of readily available, standard, external components and is available in an ultra-small QFN-20 (3mmx5mmx1.6mm) package.

Product Features

  • >80% Light-Load Efficiency
  • Low IQ: 40µA
  • Wide 2.8V to 5.5V Operating Input Range
  • Output Voltage as Low as 0.6V
  • 100% Duty Cycle in Dropout
  • 4A Output Current
  • 25mO and 12mO Internal Power MOSFETs
  • 1.2MHz Frequency
  • External Mode Control
  • External Mode Control (PWM.PFM) and Dynamic Analog Voltage
  • EN and Power Good for Power Sequencing
  • Cycle-by-Cycle Over-Current Protection (OCP)
  • 1.5ms Internal Soft-Start Time with Pre-Biased Start-Up
  • Short-Circuit Protection (SCP) with Hiccup Mode
  • Thermal Shutdown
  • Stable with Low ESR Output Ceramic Capacitors
  • Available in a QFN-20 (3mmx5mmx1.6mm) Package

Parametrics

  • fsw (max) (kHz)1200
  • Vin (min) (V)2.8
  • Vin (max) (V)5.5
  • Iout (max) (A)4
  • Isw Limit (typ) (A)5.5
  • Max Duty Cycle (%)1
  • Vfb (typ) (V)0.6
  • Iq (typ) (mA)0.04
  • Regulated Outputs1
  • Vout (max) (V)5.5
  • Vout (min) (V)0.6
  • mps_Status2
  • Mps StatusActive
  • GradeCatalog
  • PackageQFN-20 (3x5x1.6)
  • Special FeaturesLight-Load Efficiency, OCP with Hiccup Mode, PWM and PFM Selection
  • SSInternal
  • PGYes

Evaluation Kit

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Kit details

The MPM3840 is a monolithic step-down converter with built-in internal power MOSFETs and inductor. The DC-DC module is housed in a small surface QFN package which is sized 3mm width by 5mm length by 1.6mm height. It can provide 4A continuous output current from a 2.8V to 5.5V input voltage with excellent load and line regulation. The MPM3840 is ideal for powering portable equipment that runs with a single cell Lithium-Ion (Li+) Battery. The output voltage can be regulated as low as 0.6V. Only input, output capacitors and FB resistors are needed to complete the design.

The Constant-On-time (COT) control scheme provides fast transient response high light-load efficiency and easy loop stabilization. Fault condition protection includes cycle-by-cycle current limit and thermal shutdown.

The MPM3840 requires a minimum number of readily available standard external components and is available in an ultra-small QFN-20 (3mmx5mm) package.

$25.00 + tax