STEVAL-ISA187V1：38 V, 0.5 A synchronous step-down switching regulator evaluation board based on A6985F
The STEVAL-ISA187V1 is a product evaluation board based on the ST
synchronous step-down switching regulator A6985F, which can deliver up to 0.5 A and, with its
100% duty cycle ability to withstand cold crank events and wide input operating voltage range,
represents the ideal choice for battery-powered automotive systems. Synchronous rectification
helps achieve higher efficiency at full load as well as application compactness, while
high-frequency switching (programmable up to 2 MHz) helps reduce the cost and size of power
passive components while remaining outside the AM band.
The device can operate in low consumption mode (LCM), with a quiescent
current of 30 μA at VIN=12 V and VOUT= 3.3 V that ensures high efficiency under light load,
which is a requirement in typical car body applications that are active when a car is parked.
A low noise mode (LNM) can be selected to meet the requirements of infotainment applications
with forced PWM mode under all load conditions. The default board configuration is LCM active,
2 MHz switching frequency, high ISKIP current and the
switchover feature enabled, but all of these settings can be easily changed so the user can
evaluate different application scenarios.
Key Features
- AECQ100 qualification
- 0.5 A DC output current
- 4 V to 38 V operating input voltage
- Low consumption mode or low noise mode
- Programmable ISKIP
current
- 30 μA IQ
at light load (LCM
VIN
= 12 V and VOUT
=3.3 V)
- 8 μA IQ-SHTDWN
- Adjustable fSW
(250 kHz - 2
MHz)
- Output voltage adjustable from 0.85 V to VIN
- Embedded output voltage supervisor
- Synchronization
- Adjustable soft-start time
- Internal current limiting
- Overvoltage protection
- Output voltage sequencing
- Peak current mode architecture
- RDS(on)HS
= 360 mΩ; RDS(on)LS
= 150 mΩ
- Thermal shutdown
- RoHS compliant
Product Specifications
Board Manufacturing Specifications
Bill of Materials
Schematic Packs
License Agreement
Sample & Buy
| Part Number | Core Product | Unit Price (US$)
* | Quantity | ECCN (EU) | ECCN (US) | Country of Origin |
|---|
| STEVAL-ISA187V1 | A6985F | 24.50 | 1 | NEC | EAR99 | ITALY |
Quality & Reliability
| Part Number | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|
| STEVAL-ISA187V1 | CARD | Industrial | Ecopack2 | |
