STEVAL-ISA083V1:4 A peak 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40IPUR

The STEVAL-ISA083V1, based on the ST1S40IPUR, is an internally compensated 800 kHz fixed-frequency PWM synchronous step-down converter demonstration board.

The ST1S40 operates from 4.0 V to 18.0 V input, while it regulates an output voltage as low as 0.8 V and up to VIN(100% duty cycle).

The ST1S40 integrates a 95 mΩ high-side switch and a 69 mΩ synchronous rectifier allowing very high efficiency with very low output voltage.

The peak current mode control with internal compensation delivers a very compact solution with a minimum component count.

The ST1S40 is protected through cycle-by-cycle current limiting in case of overload and is also protected by a current foldback function with frequency reduction in case of short-circuit.

The device is available with an enable on/off function.

Key Features

  • Input voltage Vin : 4 V to 18 V
  • Output voltage Vout : 3.3 V
  • Maximum output current: 4 A
  • Switching frequency: 800 kHz
  • Short-circuit protected
  • RoHS compliant
Product Specifications
DescriptionVersionSize
DB1449: 4 A peak 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40IPUR1.1109 KB
Board Manufacturing Specifications
DescriptionVersionSize
STEVAL-ISA083V1 gerber files2.1106 KB
Bill of Materials
DescriptionVersionSize
STEVAL-ISA083V1 BOM1.070 KB
Schematic Packs
DescriptionVersionSize
STEVAL-ISA083V1 schematics1.037 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-ISA083V1ST1S40IPUR511NECEAR99ITALY
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
STEVAL-ISA083V1CARDIndustrialEcopack2
4 A peak 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40IPUR STEVAL-ISA083V1
4 A peak 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40IPUR STEVAL-ISA083V1
4 A peak 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40IPUR STEVAL-ISA083V1
4 A peak 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40IPUR STEVAL-ISA083V1
ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 ST-LINK-V2