Back to Monolithic Power Systems (MPS)

Monolithic Power Systems (MPS) MP1653N Synchronous Step-Down Converters

Monolithic Power Systems (MPS) MP1653N Synchronous Step-Down Converters provide a compact and highly efficient power conversion solution for space-constrained designs. These converters support a wide 4.5V to 16V input voltage range and deliver up to 3A of continuous output current. Constant-on-time control enables fast transient response and tight output regulation across varying load conditions.

The MPS MP1653N integrates low-resistance internal MOSFETs and operates at a 1.1MHz switching frequency to improve efficiency and reduce external component size. Power-saving mode enhances light-load efficiency, while protection features include short-circuit, over-current, under-voltage, and thermal shutdown. Housed in a compact 1.6mm × 1.6mm SOT563 package, the device is well suited for flat-panel displays, set-top boxes, security cameras, and general-purpose power supplies.

Features

  • Wide 4.5V to 16V operating input voltage range
  • 3A output current
  • 58mΩ/32mΩ low on-resistance internal power MOSFETs
  • 110μA quiescent current
  • 0.6V to 8V output voltage range
  • ±1% Feedback (FB) accuracy at room temperature
  • ±1.5% FB accuracy across the full temperature range
  • 1.1MHz switching frequency
  • Power-Save Mode (PSM) for high light-load efficiency
  • Excellent load transient performance
  • Pre-biased start-up
  • Enable (EN) power sequencing
  • Over-Current Protection (OCP) and hiccup mode
  • Thermal shutdown
  • Available in a SOT563 (1.6mm х 1.6mm) package
  • Optimized performance with the MPS MPL-AL4020/MPL-AL6050 inductor series

Applications

  • Flat-panel TVs and monitors
  • Digital set-top boxes
  • Security cameras
  • General-purpose power supplies

Specifications

  • 4.5V to 16V operating supply voltage range
  • 2W maximum continuous power dissipation
  • Supply current
    • 10μA maximum shutdown
    • 200μA maximum quiescent, 110μA typical
  • MOSFET
    • 58mΩ typical high-side MOSFET (HS-FET) on-resistance
    • 32mΩ typical low-side MOSFET (LS-FET) on-resistance
    • 10μA maximum leakage
  • Current limit and Zero-Current Detection (ZCD)
    • 3.3A to 5.7A valley current limit, 4.5A typical
    • 12.5% typical short hiccup duty cycle
    • 150mA typical ZCD threshold
  • 1000kHz to 1210kHz switching frequency range, 1100kHz typical
  • 45ns (typical) minimum on time
  • 80ns to 150ns (typical) minimum off-time range, 115ns typical
  • Reference and Soft Start (SS)
    • Feedback (FB) voltage
      • 594mV to 606mV range at +25°C, 600mV typical
      • 591mV to 609mV range from -40°C to +125°C, 600mV typical
    • 0.5ms to 1.6ms SS time range, 1ms typical
  • Thermal protection
    • 155°C typical shutdown
    • 20°C typical hysteresis
  • -40°C to +125°C operating junction temperature range
  • +150°C maximum junction temperature
  • +260°C maximum lead temperature

Typical Application

Application Circuit Diagram - Monolithic Power Systems (MPS) MP1653N Synchronous Step-Down Converters

Functional Block Diagram

Block Diagram - Monolithic Power Systems (MPS) MP1653N Synchronous Step-Down Converters

Related Inductors

Monolithic Power Systems (MPS) MPL Surface-Mount Inductors

Designed for optimal performance with MPS ICs, provides an easy, complete power solution.

Learn Moreabout Monolithic Power Systems (MPS) MPL Surface-Mount Inductors View Productsrelated to Monolithic Power Systems (MPS) MPL Surface-Mount Inductors
Published: 2026-10-23 | Updated: 2026-10-23