STEVAL-ISA152V1:3.3 V/3 A high efficiency step down DC-DC converter (VIN= 4.5 to 60 V) based on the L7987

The STEVAL-ISA152V1 product evaluation board is a step-down switching power supply based on the L7987 regulator in an HTSSOP16 package. The output voltage can be set starting from 0.8 V. Low drop-out operation, with almost 100% duty cycle, can be achieved.

The L7987 is a 61 V, 3 A step-down asynchronous switching regulator with embedded power MOSFET caable of delivering up to 3 A of current, depending on the application conditions.

The embedded switch-over feature on the VBIAS pin and the light load management (pulse skipping) are intended to maximize power conversion efficiency across the entire load range.

The soft-start, current limit threshold and the switching frequency are adjustable for application optimization.

The device includes an internal 250 kHz oscillator that can be externally adjusted up to 1.5 MHz; two L7987 regulators can be synchronized in a 180° out-of-phase configuration for reduced total input RMS current

Key Features

  • 3.3 V output voltage
  • 3 A DC output current
  • 4.5 V to 60 V input voltage
  • 500 kHz switching frequency
  • 3.5 ms programmed soft-start
  • VBIAS switch-over for improved efficiency at light load
  • 180° out of phase synchronization available
  • Open drain PGOOD available
  • Auto recovery overcurrent and thermal protection
  • RoHS compliant
Product Specifications
DescriptionVersionSize
DB2108: 3.3 V/3 A high efficiency step down DC-DC converter (VIN= 4.5 to 60 V) based on the L79871.0131 KB
Board Manufacturing Specifications
DescriptionVersionSize
STEVAL-ISA152V1 gerber files1.01 MB
Bill of Materials
DescriptionVersionSize
STEVAL-ISA152V1 BOM1.047 KB
Schematic Packs
DescriptionVersionSize
STEVAL-ISA152V1 schematics1.048 KB
License Agreement
DescriptionVersionSize
Evaluation products license agreement1.0125 KB
Sample & Buy
Part NumberCore ProductUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
STEVAL-ISA152V1L798779.631NECEAR99ITALY
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
STEVAL-ISA152V1CARDIndustrialEcopack2
3.3 V/3 A high efficiency step down DC-DC converter (VIN= 4.5 to 60 V) based on the L7987 STEVAL-ISA152V1
3.3 V/3 A high efficiency step down DC-DC converter (VIN= 4.5 to 60 V) based on the L7987 STEVAL-ISA152V1
3.3 V/3 A high efficiency step down DC-DC converter (VIN= 4.5 to 60 V) based on the L7987 STEVAL-ISA152V1
3.3 V/3 A high efficiency step down DC-DC converter (VIN= 4.5 to 60 V) based on the L7987 STEVAL-ISA152V1
ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 ST-LINK-V2