ISSI IS31PM3427 | Demoboard IS31PM3427 DEMO BOARD

Description

The IS31PM3427 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 4A of load current from an input voltage ranging of 3.8V to 36V. The IS31PM3427 provides exceptional efficiency, output accuracy and drop-out voltage in a very small solution size. Constant on-time control mode is employed to achieve simple controlloop compensation and fast transient response. The IS31PM3427 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, cycleby-cycle current limit, over-voltage and output short circuit protection.

Features

• Input voltage range from 3.8V to 36V
• 1μA (Typ.) shutdown current
• 25μA quiescent current (typical, no switching)
• Up to 4A output current capability
• Adjustable output voltage, 1V to 24V
• Output regulation accuracy: ±1%
• 93% efficiency at full load (5V/3A)

• 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
• Operating junction temperature range from -40°C ~ +120°C
• WFCQFN-14 (3mm × 4mm) compact package
• RoHS & Halogen-Free Compliance
• TSCA Compliance

Typical applications

• General-purpose power supply

More information

• Datasheet
• IC product information