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reference designIS32PM3426 | Demoboard IS32PM3426 DEMO BOARD

ISSI IS32PM3426 | Demoboard IS32PM3426 DEMO BOARD

3.8V TO 36V, 2A, 2.2MHZ, SYNCHRONOUS STEP-DOWN VOLTAGE REGULATOR

Overview

TopologyOther Topology
Input voltage3.8-36 V
Output 124 V
IC revision0A

Description

The IS32PM3426 regulator is an automotive focused high-performance 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 IS32PM3426 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 IS32PM3426 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 2A output current capability
  • Adjustable output voltage, 1V to 24V
  • Output regulation accuracy:
  • ±1% at 25°C
  • ±2% over -40°C ~150°C
  • 93% efficiency at full load (5V/2A)

  • 85% efficiency at light load (5V/100mA)

  • Integrated synchronous rectifier
  • 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

Typical applications

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

More information

Products

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Order Code
Data­sheet
Downloads
Status
Product series
L(µH)
Tol. L
IRP,40K(A)
IR,40K(A)
ISAT,30%(A)
fres(MHz)
ISAT,10%(A)
Mount
RDC typ.(mΩ)
Material
SamplesAvailability & Sample
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78439344047
SPECWE-XHMA SMD Power Inductor, 4.7 µH, ±20%

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-XHMA SMD Power Inductor
Inductance4.7 µH
Inductance±20% 
Performance Rated Current5.8 A
Rated Current4.7 A
Saturation Current @ 30%10.5 A
Self Resonant Frequency28 MHz
Saturation Current @ 10%3.7 A
MountSMT 
DC Resistance31 mΩ
MaterialHyperflux 
–Check availability
78439346100
SPECWE-XHMA SMD Power Inductor, 10 µH, ±20%

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-XHMA SMD Power Inductor
Inductance10 µH
Inductance±20% 
Performance Rated Current6.4 A
Rated Current5 A
Saturation Current @ 30%9.7 A
Self Resonant Frequency18 MHz
Saturation Current @ 10%5.05 A
MountSMT 
DC Resistance26.5 mΩ
MaterialHyperflux 
–Check availability