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AST1S31PUR - STMicroelectronics

Description: Up to 4 V, 3 A step-down 1.5 MHz switching regulator for automotive applications

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AST1S31PUR - STMicroelectronics PCB footprint - Small Outline No-lead - Small Outline No-lead - Figure 25. VFDFPN8 (3 x 3 x 1.0 mm) package outline
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3D Models
AST1S31PUR - STMicroelectronics  - 3D model - Small Outline No-lead - Figure 25. VFDFPN8 (3 x 3 x 1.0 mm) package outline
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AST1S31PUR Details

  • Manufacturer Part Number:

    AST1S31PUR

  • Brand Name:

    STMicroelectronics

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    3 X 3 MM, 1 MM HEIGHT, ROHS COMPLIANT, VFDFP-8

  • Country Of Origin:

    Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Factory Lead Time:

    16 Weeks

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    8

  • Additional Feature:

    ADJUSTABLE OUTPUT VOLTAGE RANGE FROM 0.8 VOLT TO 4 VOLT

  • Analog IC - Other Type:

    SWITCHING REGULATOR

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    4 V

  • Input Voltage-Min:

    2.8 V

  • Input Voltage-Nom:

    4 V

  • JESD-30 Code:

    S-PDSO-N8

  • JESD-609 Code:

    e4

  • Length:

    3 mm

  • Moisture Sensitivity Level:

    3

  • Number of Functions:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current-Max:

    6 A

  • Output Voltage-Min:

    0.8 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HVSON

  • Package Shape:

    SQUARE

  • Package Style:

    SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE

  • Peak Reflow Temperature (Cel):

    260

  • Screening Level:

    AEC-Q100

  • Seated Height-Max:

    1 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK

  • Switching Frequency-Max:

    1900 kHz

  • Temperature Grade:

    AUTOMOTIVE

  • Terminal Finish:

    Nickel/Palladium/Gold (Ni/Pd/Au)

  • Terminal Form:

    NO LEAD

  • Terminal Pitch:

    0.65 mm

  • Terminal Position:

    DUAL

  • Width:

    3 mm

AST1S31PUR Frequently Asked Questions (FAQs)

  • The recommended power-up sequence is to first apply VDD (1.8V to 3.6V) and then VBAT (1.1V to 3.6V). This ensures proper initialization of the internal registers and oscillators.
  • To configure the AST1S31PUR for low-power mode, set the LPEN bit in the Control Register (CR) to 1. This will reduce the power consumption of the device. Additionally, you can also use the Power-Down mode by setting the PD bit in the CR to 1.
  • The internal oscillator on the AST1S31PUR has an accuracy of ±10% over the entire operating temperature range (-40°C to 85°C). This accuracy is sufficient for most applications, but if higher accuracy is required, an external crystal oscillator can be used.
  • Yes, the AST1S31PUR can be used as an RTC in battery-backed mode. The device has a built-in battery switch that allows the RTC to continue running even when the main power supply (VDD) is removed. The VBAT pin should be connected to a battery or a supercapacitor to maintain the RTC operation.
  • The AST1S31PUR can be reset by applying a low signal to the RST pin or by setting the SWRST bit in the Control Register (CR) to 1. The device will reset and restart its operation from the default values.

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AST1S31PUR Overview

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About STMicroelectronics

STMicroelectronics (ST) is a global semiconductor company that designs, manufactures, and markets a broad range of integrated circuits (ICs), discrete devices, and other electronic components. STMicroelectronics offers a diverse portfolio of semiconductor products covering a wide range of applications and industries. Their product categories include microcontrollers, analog and mixed-signal ICs, MEMS (Micro-Electro-Mechanical Systems) sensors, power management ICs, RF (Radio Frequency) transceivers, aut

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