ISSI IS31PM3426 | Demoboard IS31PM3426 DEMO BOARD

Beschreibung

The IS31PM3426 regulator is a fully integrated and high frequency synchronous step-down DC-DC converter that can drive a load current of up to 2A. It can operate within an input voltage range of 3.8V to 36V. The IS31PM3426 provides exceptional efficiency, output accuracy and drop-out voltage in a very small solution size. Constant on-time control mode isemployed to achieve simple control-loop compensation and fast transient response. The IS31PM3426 supports both Forced Continuous Conduction Mode (FCCM) and Pulse Frequency Modulation mode (PFM) at light-load condition, which is selected by the FPWM pin. It requires few external components. Pin arrangement allows simple, optimum PCB layout. Protection features include thermal shutdown, VDD under-voltage lockout, cycle-by-cycle current limit, over-voltage and output short-circuit protection.

Eigenschaften

• Input voltage range from 3.8V to 36V
• 1μA (Typ.) shutdown current
• 25μA quiescent current (typical, no switching)
• Up to 2A output current capability
• Adjustable output voltage, 1V to 24V
• Output regulation accuracy: ±1%
• 95% efficiency at full load (5V/2A)

• 91% efficiency at light load (5V/100mA)

• Integrated 80mΩ High-Side and 40mΩ Low-Side MOSFETs
• Operating frequency range: 100kHz to 2.2MHz
• Programmed by a single resistor
• Synchronized to external clock
• Pin-selectable FCCM or PFM operation mode
• Spread spectrum to minimize EMI
• Few external components
• Internal loop compensation
• Internal soft-start
• Power good flag output
• Fault protections
• Cycle by cycle current limit
• Precision enable to program system UVLO
• Output short-circuit protection with hiccup mode
• Output over-voltage protection
• VDD under-voltage lockout
• Thermal shutdown protection
• WFCQFN-14 (3mm × 4mm) compact package
• RoHS & Halogen-Free Compliance
• TSCA Compliance

Typische Anwendungen

• Buck Converter, General-purpose power supply

Weiterführende Informationen

• Datenblatt
• Produktseite des IC-Herstellers