STMPS2242TTR

Overview

The STMPS2242TTR is an enhanced dual-channel power distribution switch manufactured by STMicroelectronics, designed for applications involving heavy capacitive loads and short-circuits. It incorporates two high-side MOSFET switches with a maximum on-resistance of 120 mΩ. The device operates within a load voltage range of 2.7 V to 5.5 V and supports continuous currents up to 500 mA per channel. Key electrical parameters include a maximum operating temperature of +85 °C, a typical rise time of 2.5 ms, and a maximum standby supply current of 13 μA.

Feature Summary

• Integrated thermal protection circuit that automatically shuts off the switch during excessive power dissipation and resumes operation upon cooling.
• Independent short-circuit protection for each channel that limits output current to a safe level via constant current mode.
• Dedicated overcurrent logic output that signals fault conditions by pulling low when load exceeds current limit thresholds.
• Internal circuitry ensures the switch remains off until valid input voltage is present, preventing unintended activation.

Applications

• Power distribution systems requiring multiple switches in a single package
• Applications subject to heavy capacitive loads
• Systems prone to short-circuit events

Procurement Notes

Verify the specific suffix 'TTR' corresponds to the MSOP-8 tape and reel packaging configuration. Confirm RoHS compliance status and ensure the component meets the required ambient temperature range specifications for your target environment. Cross-reference the manufacturer part number with official distributor catalogs to validate authenticity and current production status before finalizing procurement orders.

Selection Notes

Select this component when designing circuits that require independent control of two high-side loads with integrated fault management. It is suitable for systems needing CMOS or TTL compatible inputs and reverse current protection. Consider the 8-MSOP-EP package constraints and the 120 mΩ on-resistance impact on power dissipation when sizing thermal solutions for dense PCB layouts.

Part Context

This device belongs to the STMPS22x2 family of power distribution switches, which includes variants like the STMPS2252 and STMPS2262. These components share similar functional architectures but differ in on-resistance values and current handling capabilities. The STMPS2242 specifically offers a 120 mΩ on-resistance, distinguishing it from lower resistance counterparts in the series while maintaining compatibility with standard power switching interfaces.

Replacement Considerations

The STMPS2262TTR is a confirmed substitute within the same product family. Verify that the alternative's lower on-resistance and higher current rating are compatible with your system's thermal and electrical requirements before swapping components.

FAQ

How does the STMPS2242TTR handle thermal shutdown recovery?

Recovery from thermal shutdown is automatic once the device has cooled sufficiently, without requiring external intervention.

What indicates a short-circuit condition on the STMPS2242TTR?

The device pulls the overcurrent (OCx) logic output low when the output load exceeds the current limit threshold or a short is present.