ISL8215M

15A 42V Single-Channel DC/DC Step-Down Power Module

OVERVIEW

The ISL8215M power module is a single-channel, synchronous step-down, non-isolated complete power supply, capable of delivering up to 15A of continuous current. Operating from a single 7V to 42V wide input power rail and integrating the controller, power inductor, and MOSFETs, the ISL8215M requires only a few external components to operate and is optimized for space constrained applications.

Based on a valley current mode PWM control scheme, the ISL8215M provides fast transient response and excellent loop stability. It offers an adjustable output voltage range of 0.6V to 12V with better than 1.5% accuracy over line, load, and temperature. A 40ns typical minimum on time and an adjustable operating frequency allow it to support low duty cycle, single-step down conversions to point-of-load voltages and its operating frequency can also be synchronized with an external clock signal. The ISL8215M implements a selectable Pulse Skipping Mode (PSM) with Diode Emulation Mode (DEM) to improve light-load efficiency for battery related applications. A programmable soft-start reduces the inrush current from the input supply while a dedicated enable pin and power-good flag allow for easy system power rails sequencing with voltage tracking capability. Excellent efficiency and low thermal resistance permit full power operation without heatsinks.

Input Undervoltage Lockout (UVLO), over-temperature, programmable overcurrent, output overvoltage, and output prebias start-up protections ensure safe operations under abnormal operating conditions.

The ISL8215M is available in a compact RoHS compliant thermally-enhanced 19mmx13mmx5.3mm HDA package.

KEY FEATURES

  • 15A single-channel complete power supply
  • Integrates controller, MOSFETs, and inductor
  • 7V to 42V wide input voltage range
  • Adjustable output voltage
  • 0.6V to 12V wide output voltage range
  • 40ns on-time low duty cycle conversion capable
  • ±1.5% accuracy over line, load, and temperature
  • Up to 96.5% efficiency
  • 300kHz to 2MHz adjustable PWM operations
  • External synchronization up to 1MHz
  • Selectable light-load PSM/DEM efficiency mode
  • Enable pin and power-good flag
  • Programmable soft-start or voltage tracking
  • Complete protection
  • UVLO, programmable overcurrent, overvoltage, and over-temperature
  • Prebias output start-up
  • 19mmx13mmx5.3mm HDA package

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL8215M
Input Voltage Min (V)
7
Control Type
Current Mode
Input Voltage Max (V)
42
SYNCH Capability
Yes
Output Voltage Min (V)
0.6
Current Sharing
No
Output Voltage Max (V)
12
Tracking
Yes
Output Current Max (A)
15
Digital
No
IQ
2.5 mA
Qualification Level
Standard
Peak Efficiency (%)
96.5
Configuration
Load
POR
Yes
Switching Frequency Range (MHz)
0.300 to 2
Switching Freq. (max) (MHz)
2
Can Sample
YES
Switching Freq. (min) (MHz)
0.3
Temperature Range
-40 to +85

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