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Texas Instruments TPS2231PWPRG4 — Power Management (PMIC / Gate Driver)

TI TPS2231PWPRG4 ExpressCard Power Switch, 45 mOhm, Obsolete

MPNTPS2231PWPRG4
Obsolete

Texas Instruments TPS2231PWPRG4 ExpressCard™ switch, 3-output high-side, 45 mOhm Rds(on) typ, 1.3 A max per output, 1.5V/3.3V load, 24-HTSSOP exposed pad, -40°C to 85°C.

Texas Instruments TPS2231PWPRG4 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TPS2231PWPRG4 specifications
ParameterValue
TypeExpressCard™ Switch
MountingSurface Mount
Voltage - load1.5V, 3.3V
Voltage - supply (Vcc (Vdd))Not Required
Output current1.3A
I/O channels3
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR)
FeaturesPower Good, Status Flag
Rds on45mOhm
Case24-TSSOP (0.173\", 4.40mm Width) Exposed Pad
Fault protectionCurrent Limiting (Fixed), Over Temperature
Output configurationHigh Side
Ratio - Input:Output1:1

Product details

ExpressCard slot power switch with three managed outputs

The Texas Instruments TPS2231PWPRG4 is a three-output high-side power switch designed for ExpressCard™ slot power management. It switches the 1.5 V and 3.3 V rails to the card with a typical on-resistance of 45 mOhm per channel, delivering up to 1.3 A per output. The switch integrates fixed current limiting and over-temperature protection, plus a power-good output and a status flag for fault reporting to the host controller.

45 mOhm Rds(on) and 1.3 A per channel — thermal budget for the slot

At 1.3 A per output, the 45 mOhm typical Rds(on) produces conduction loss per channel.

24-HTSSOP with exposed pad — footprint and rework

The package with a 4.40 mm body width and an exposed thermal pad requires a solder-paste stencil aperture on the centre pad for reliable solder-joint formation. The supplier device package is 24-HTSSOP — the 'H' denotes the exposed pad.

Frequently asked questions

What is the Rds(on) of TPS2231PWPRG4?

The typical on-resistance is 45 mOhm per channel, specified at the load voltage. This is the conduction loss floor at 25°C junction; actual Rds(on) increases with temperature per the normalised curve in the datasheet.

Does TPS2231PWPRG4 have over-temperature protection?

Yes, the switch includes over-temperature shutdown and fixed current limiting as fault protections, along with a power-good output and a status flag for fault reporting.