ISL85410

Wide VIN 1A Synchronous Buck Regulator

Product Status: Mass Production

OVERVIEW

The ISL85410 is a 1A synchronous buck regulator with an input range of 3V to 40V. It provides an easy-to-use, high efficiency low BOM count solution for a variety of applications.

The ISL85410 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 a forced PWM mode is needed. The ISL85410 switches at a default frequency of 500kHz; however, it can also be programmed using an external resistor from 300kHz to 2MHz. The ISL85410 has the ability to use internal or external compensation. By integrating both NMOS devices and providing internal configuration options, minimal external components are required, which reduces BOM count and complexity of design.

With a wide VIN range and reduced BOM, the ISL85410 provides an easy to implement design solution for a variety of applications while giving superior performance. The ISL85410 provides a very robust design for high-voltage industrial applications and an efficient solution for battery powered applications.

The ISL85410 is available in a small Pb-free 4mmx3mm DFN plastic package with a full-range industrial temperature of -40°C to +125°C.

KEY FEATURES

    • Wide input voltage range: 3V 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 fixed frequency (500kHz) or adjustable switching frequency (300kHz to 2MHz)
    • Continuous output current up to 1A
    • Internal or external soft-start
    • Minimal external components required
    • Power-good and enable functions available

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL85410
Basic Information
Production Status
Mass Production
iSim Model
YES
# of Outputs
1
Topology [Rail 1]
Buck
Input Voltage Min (V) [Rail 1]
3
Input Voltage Max (V) [Rail 1]
40
Output Voltage Min (V) [Rail 1]
0.6
Output Voltage Max (V) [Rail 1]
34
Output Current Max (A) [Rail 1]
1
IQ [Rail 1]
80 µA
Switching Freq. (max) (MHz)
2
Switching Freq. (min) (MHz)
0.3
Max Duty Cycle (%)
See Datasheet
Qualification Level
Standard
Peak Efficiency (%)
94
POR
Yes
SYNCH Capability
Yes
Control Type
Current Mode
Switching Frequency Range (MHz)
0.3 to 2.0
Can Sample
YES
Temperature Range
-40 to +125

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Cross Reference

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Knowledge Base

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FAQs

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This webinar introduces the ISL85003 and ISL85003A synchronous buck (step-down) regulators with integrated high-side and low-side FETs.
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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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