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MaxLinear XR76203-Q

5A 40V Synchronous Step Down COT Regulator PowerBlox™

Overview

TopologyBuck Converter
Input voltage24 V
Switching frequency100-800 kHz
Output 13.3 V / 5 A
IC revision1C

Description

The XR76203-Q is a synchronous step-down regulator combining the controller, drivers, bootstrap diode and MOSFETs in a single package for point-of-load supplies. The XR76203-Q has a load current rating of 5A. A wide 3.0V to 40V input voltage range allows for single supply operation from industry standard 24V ±10%, 18V-36V, and rectified 18VAC and 24VAC rails.With a proprietary emulated current mode Constant On-Time (COT) control scheme, the XR76203-Q provides extremely fast line and load transient response using ceramic output capacitors. It requires no loop compensation, simplifying circuit implementation and reducing overall component count. The control loop also provides 0.07% load and 0.15% line regulation and maintains constant operating frequency. A selectable power saving mode allows the user to operate in discontinuous conduction mode (DCM) at light current loads thereby significantly increasing the converter efficiency.A host of protection features, including over-current, over-temperature, short-circuit and UVLO, helps achieve safe operation under abnormal operating conditions.The XR76203-Q is available in a RoHS-compliant, green/halogen-free space-saving QFN 5x5mm package.

Features

  • Controller, drivers, bootstrap diode and MOSFETs integrated in one package
  • 5A step down regulator
  • Wide 5.0V to 40V input voltage range
  • ◦3V to 40V PVIN with 5V bias
  • ◦4.5 to 5.5V single supply operation
  • ◦≥0.6V adjustable output voltage
  • Proprietary Constant On-Time Control ◦No loop compensation required
  • ◦Stable ceramic output capacitor operation
  • ◦Programmable 200ns to 2µs on-time
  • ◦Constant 100kHz to 800kHz frequency
  • Selectable CCM or CCM/DCM
  • ◦CCM/DCM for high efficiency at light-load
  • ◦CCM for constant frequency at light-load
  • Programmable hiccup current limit with thermal compensation
  • Precision enable and power good flag
  • Programmable soft-start
  • 30-pin 5x5mm QFN package
  • Pin compatible 3A regulator, XR76203
  • Pin compatible 8A regulator, XR76208

Typical applications

  • Power supply modules
  • Distributed power architecture
  • FPGA, DSP, and processor supplies
  • Base stations, switches/routers, and servers
  • Point-of-load converters

More information

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Mount Samples
74437368047
STE ALT EAG CAD LTS PSP SPE IGS CADWE-LHMI SMT Power Inductor 4.7 7 19 15 15.5 16 SMT
Order Code Data­sheet
74437368047
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Mount Samples