ISL85413

Wide V<sub>IN</sub> 300mA Synchronous Buck Regulator

Product Status: Mass Production

OVERVIEW

The ISL85413 is a 300mA synchronous buck regulator with an input range of 3.5V to 40V. It provides an easy to use, high efficiency low BOM count solution for a variety of applications.

The ISL85413 integrates both high-side and low-side NMOS FETs and features a PFM mode for improved efficiency at light loads. This feature can be disabled if forced PWM mode is desired. The part switches at a default frequency of 700kHz. By integrating both NMOS devices and providing internal configuration, minimal external components are required, reducing BOM count and complexity of design.

With the wide VIN range and reduced BOM, the part provides an easy to implement design solution for a variety of applications while giving superior performance. It will provide a very robust design for high voltage industrial applications as well as an efficient solution for battery powered applications.

The part is available in a small Pb-free 3mmx3mm TDFN plastic package with an operation junction temperature range of -40°C to +125°C.

KEY FEATURES

  • Wide input voltage range of 3.5V to 40V
  • Synchronous operation for high efficiency
  • No compensation required
  • Integrated high-side and low-side NMOS devices
  • Selectable PFM or forced PWM mode at light loads
  • Internal switching frequency 700kHz
  • Continuous output current up to 300mA
  • Internal soft-start
  • Minimal external components required
  • Power-good and enable functions available Applications

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL85413
Basic Information
Production Status
Mass Production
Topology
Buck
# of Outputs
1
Input Voltage Min (V)
3.5
Input Voltage Max (V)
40
Output Voltage Min (V)
0.6
Output Voltage Max (V)
34
Output Current Max (A)
0.3
IQ
50 µA
Switching Freq. (max) (MHz)
0.784
Switching Freq. (min) (MHz)
0.6
Max Duty Cycle (%)
See Datasheet
Qualification Level
Standard
Peak Efficiency (%)
92
POR
Yes
SYNCH Capability
No
Control Type
Current Mode
Switching Frequency Range (MHz)
0.6 to 0.784
Can Sample
YES
Temperature Range
-40 to +125

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Cross Reference

Intersil Cross Reference

Cross-reference based on data from industry sources. Support for the online tool has been discontinued, but the data is still available.

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Knowledge Base

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FAQs

Related Boards and Kits

Related Videos

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This webinar introduces three buck-boost regulators in QFN packages, ISL91127IR, ISL91107IR, ISL9120IR, for battery-powered portable devices.
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This webinar introduces the ISL85003 and ISL85003A synchronous buck (step-down) regulators with integrated high-side and low-side FETs.
11:01
This webinar introduces the ISL78233, ISL78234 and ISL78235 automotive grade synchronous buck regulators for point-of-load applications.
3:02
Find out how the highly efficient, compact 12V synchronous buck regulator family can meet your power requirements for 12V rails.
9:50
This webinar introduces three buck-boost regulators in QFN packages, ISL91127IR, ISL91107IR, ISL9120IR, for battery-powered portable devices.
3:57
This webinar introduces the ISL85003 and ISL85003A synchronous buck (step-down) regulators with integrated high-side and low-side FETs.
11:01
This webinar introduces the ISL78233, ISL78234 and ISL78235 automotive grade synchronous buck regulators for point-of-load applications.
3:02
Find out how the highly efficient, compact 12V synchronous buck regulator family can meet your power requirements for 12V rails.
9:50
This webinar introduces three buck-boost regulators in QFN packages, ISL91127IR, ISL91107IR, ISL9120IR, for battery-powered portable devices.
3:57
This webinar introduces the ISL85003 and ISL85003A synchronous buck (step-down) regulators with integrated high-side and low-side FETs.
11:01
This webinar introduces the ISL78233, ISL78234 and ISL78235 automotive grade synchronous buck regulators for point-of-load applications.

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