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reference designIS32PM3427 | Demoboard IS32PM3427 DEMO BOARD

ISSI IS32PM3427 | Demoboard IS32PM3427 DEMO BOARD

3.8V TO 36V, 4A, 2.2MHZ, SYNCHRONOUS STEP-DOWN VOLTAGE REGULATOR

Overview

TopologyOther Topology
Input voltage9-16 V
Switching frequency100-2200 kHz
Output 124 V
IC revisionA

Description

The IS32PM3427 regulator is a fully integrated and high frequency synchronous step-down DC-DC converter that can drive a load current of up to 4A. It can operate within an input voltage range of 3.8V to 36V. The IS32PM3427 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 control-loop compensation and fast transient response. The IS32PM3427 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.

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% at 25°C
  • ±2% over -40°C ~ +150°C
  • 93% efficiency (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 ~ +150°C
  • WFCQFN-14 (3mm × 4mm) compact package
  • RoHS & Halogen-Free Compliance
  • TSCA Compliance
  • AEC-Q100 Qualified with Temperature Grade 1: -40°C to 125°C

Typical applications

  • Automotive LED lighting system, Automotive body electronics
  • General-purpose power supply

More information

Products

Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC max.(mΩ)
fres(MHz)
Mount
Tol. L
IR,40K(A)
RDC typ.(mΩ)
Material
Samples
74437336047
WE-LHMI SMT Power Inductor, 4.7 µH, 4.35 A
Simu­lation
Downloads9 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

Download all 9 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-LHMI SMT Power Inductor
Inductance4.7 µH
Performance Rated Current4.35 A
Saturation Current @ 10%3.85 A
Saturation Current @ 30%7.6 A
DC Resistance53 mΩ
Self Resonant Frequency25 MHz
MountSMT 
Inductance±20% 
Rated Current3.9 A
DC Resistance50 mΩ
–
78439346056
WE-XHMA SMD Power Inductor, 5.6 µH, 8.9 A
Simu­lation–
Downloads9 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

Download all 9 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-XHMA SMD Power Inductor
Inductance5.6 µH
Performance Rated Current8.9 A
Saturation Current @ 10%5.8 A
Saturation Current @ 30%12.1 A
DC Resistance16.5 mΩ
Self Resonant Frequency25 MHz
MountSMT 
Inductance±20% 
Rated Current6.9 A
DC Resistance15 mΩ
MaterialHyperflux