Skip to main content
Log in
STMicroelectronics VIPER12ASTR-E — Power Management (PMIC / Gate Driver)

VIPER12ASTR-E – STMicro VIPER™ 8 W Offline Switcher, 730 V

MPNVIPER12ASTR-E
Active

STMicroelectronics VIPER™ series, VIPER12ASTR-E, offline switching regulator, 8 W output, 730 V breakdown, 60 kHz switching frequency, 8-SOIC surface-mount package.

$1.3600Ref. price · indicative, final on quote
STMicroelectronics VIPER12ASTR-E datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
SeriesVIPER™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

VIPER12ASTR-E specifications
ParameterValue
SeriesVIPER™
MountingSurface Mount
Voltage - start up14.5 V
Voltage - breakdown730V
Voltage - supply (Vcc (Vdd))9V ~ 38V
Power (Watts)8 W
Frequency60kHz
Operating temperature-40°C ~ 150°C (TC)
PackageTape & Reel (TR) Cut Tape (CT)
Case8-SOIC (0.154\", 3.90mm Width)
Fault protectionCurrent Limiting, Over Temperature, Over Voltage
Output isolationNon-Isolated
Internal switchYes

Product details

8 W offline switcher with 730 V avalanche-rugged MOSFET

The VIPER12ASTR-E integrates a 730 V breakdown power MOSFET and a 60 kHz PWM controller in a single 8-SOIC package, delivering up to 8 W in non-isolated flyback or buck topologies. The 14.5 V start-up threshold and 9 V to 38 V supply range allow direct connection to the rectified mains bus without an auxiliary winding for start-up.

Junction temperature rating and protection set

On-chip fault protection includes current limiting, over-temperature shutdown, and over-voltage clamping — no external sense resistor or OVP comparator needed for basic protection.

Active production status and package availability

The base product number is VIPER12. Sourced per RFQ against BOM quantity.

Frequently asked questions

Can I use VIPER12A instead of VIPER12ASTR-E?

The VIPER12A is the base product number for the same die. The VIPER12ASTR-E is the specific ordering code for the 8-SOIC package on tape-and-reel. If your BOM calls for the bare die or a different package variant, confirm the suffix matches your assembly process. For the 8-SOIC surface-mount version, VIPER12ASTR-E is the correct orderable part.

What is the closest pin-compatible alternative to VIPER12ASTR-E in the VIPER family?

Within the VIPER™ series, the VIPER12A (same base die) shares the same pinout and package footprint. The VIPER12ASTR-E is the tape-and-reel variant of that base part. No other ST VIPER device with a different power rating (e.g., VIPER17 or VIPER22) is pin-compatible — the pin assignments differ.