ISL85001

1A Standard Buck PWM Regulator

OVERVIEW

The ISL85001 is a high-performance, simple output controller that provides a single, high frequency power solution for a variety of point-of-load applications. The ISL85001 integrates a 1A standard buck PWM controller and switching MOSFET.

The PWM controller in the ISL85001 drives an internal switching N-channel power MOSFET and requires an external Schottky diode to generate an output voltage from 0.6V to 19V. The integrated power switch is optimized for excellent thermal performance for up to 1A of output current. The standard buck input voltage range supports a fixed 5V or variable 5.5V to 25V range. The PWM regulator switches at a fixed frequency of 500kHz and utilizes simple voltage mode control with input voltage feed-forward to provide flexibility in component selection and minimize solution size. Protection features include overcurrent, undervoltage and thermal overload protection integrated into the IC. The ISL85001 power-good signal output indicates loss of regulation on the PWM output.

ISL85001 is available in a small 4mmx3mm Dual Flat No-Lead (DFN) package.

KEY FEATURES

  • Standard buck controller with integrated switching power MOSFET
  • Integrated boot diode
  • Input voltage range
  • Fixed 5V ±10%
  • Variable 5.5V to 25V
  • PWM output voltage adjustable from 0.6V to 19V with continuous output current up to 1A
  • ±1% VFB tolerance
  • Voltage mode control with voltage feed-forward
  • Fixed 500kHz switching frequency
  • Externally adjustable soft-start time
  • Output undervoltage protection
  • Enable inputs
  • PGOOD output
  • Overcurrent protection
  • Thermal overload protection
  • Internal 5V LDO regulator
  • Pb-free (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL85001
Basic Information
Production Status
Mass Production
Topology
Buck
# of Outputs
1
Input Voltage Min (V)
5.5
Input Voltage Max (V)
25
Output Voltage Min (V)
0.6
Output Voltage Max (V)
19
Output Current Max (A)
1
IQ
80 µA
Switching Freq. (max) (MHz)
0.5
Switching Freq. (min) (MHz)
0.5
Max Duty Cycle (%)
See Datasheet
Qualification Level
Standard
Peak Efficiency (%)
94
POR
Yes
SYNCH Capability
No
Control Type
Voltage Mode
Switching Frequency Range (MHz)
0.5
Can Sample
YES
Temperature Range
-40 to +85

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