Microchip

MCP16311

30V Input, 1A Output, High-Efficiency,Integrated Synchronous Switch Step-Down Regulator

Topologie: Other
Schaltfrequenz (min.): 425.00 kHz
Schaltfrequenz (max.): 575.00 kHz

Erstveröffentlichung am 30.11.2013, Version B vom

Beschreibung

The MCP16311/2 is a compact, high-efficiency, fixed frequency, synchronous step-down DC-DC converter in a 8-pin MSOP, or 2 x 3 TDFN package that operates from input voltage sources up to 30V. Integrated features include a high-side and a low-side switch, fixed frequency Peak Current Mode Control, internal compensation, peak-current limit and overtemperatureprotection. The MCP16311/2 provides all the active functions for local DC-DC conversion, with fast transient response and accurate regulation.High-converter efficiency is achieved by integrating the current-limited, low-resistance, high-speed lowside and high-side switches, and associated drive circuitry. The MCP16311 is capable of running in PWM/PFM mode. It switches in PFM mode for light load conditions and for large buck conversion ratios.This results in a higher efficiency over all load ranges.The MCP16312 is running in PWM mode-only, and is recommended for noise-sensitive applications.The MCP16311/2 can supply up to 1A of continuous current while regulating the output voltage from 2V to 12V. An integrated, high-performance peak current mode architecture keeps the output voltage tightly regulated, even during input voltage steps and output current transient conditions, that are common in power systems.The EN input is used to turn the device on and off. While off, only a few micro amps of current are consumed from the input.Output voltage is set with an external resistor divider. The MCP16311/2 is offered in a small MSOP-8 and 2 x 3 TDFN surface mount packages.

Merkmale

  • Up to 95% Efficiency
  • Input Voltage Range: 4.4V to 30V
  • 1A Output Current Capability
  • Output Voltage Range: 2.0V to 24V
  • Integrated N-Channel Low and High-SideSwitches:• 170m, Low Side• 300m, High Side
  • Stable Reference Voltage: 0.8V
  • Automatic Pulse Frequency Modulation/Pulse-Width Modulation (PFM/PWM) Operation(MCP16311):• PFM Operation Disabled (MCP16312)• PWM Operation: 500 kHz
  • Low Device Shutdown Current: 3 μA typical
  • Low Device Quiescent Current:• 44 μA (non-switching, PFM Mode)
  • Internal Compensation
  • Internal Soft-Start: 300 μs (EN low to high)
  • Peak Current Mode Control
  • Cycle-by-Cycle Peak Current Limit
  • Undervoltage Lockout (UVLO):• 4.1V typical to start• 3.6V typical to stop
  • Overtemperature Protection
  • Thermal Shutdown:• +150°C• +25°C Hysteresis

Artikel

  Artikel Nr. SPEC Produktserie L1
(µH)
IR 1
(A)
ISAT 1
(A)
RDC1 typ
(mΩ)
RDC1 max.
(mΩ)
fres 1
(MHz)
Muster
744053150 PDF WE-TPC SMT-Speicherdrossel 15 1.38 1.15 80 100 20

Weitere Anwendungen und Artikel von Würth Elektronik zu diesem IC

  • MCP16311
    Topologie: Buck, Eingangsspannung (min.): 12.00 V, Eingangsspannung (max.): 12.00 V, Schaltfrequenz (min.): 425.00 kHz, Schaltfrequenz (max.): 575.00 kHz, Ausgang 1: 5.00 V / 1.000 A
  • MCP16311
    Topologie: Buck, Eingangsspannung (min.): 4.50 V, Eingangsspannung (max.): 30.00 V, Schaltfrequenz (min.): 425.00 kHz, Schaltfrequenz (max.): 575.00 kHz, Ausgang 1: 3.30 V / 1.000 A
  • MCP16311
    Topologie: Buck, Eingangsspannung (min.): 6.00 V, Eingangsspannung (max.): 30.00 V, Schaltfrequenz (min.): 425.00 kHz, Schaltfrequenz (max.): 575.00 kHz, Ausgang 1: 5.00 V / 1.000 A