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Texas Instruments TPS2231MRGPR-3 — Power Management (PMIC / Gate Driver)

TI TPS2231MRGPR-3 ExpressCard Power Switch, 45 mOhm, 1.3 A

MPNTPS2231MRGPR-3
Active

Texas Instruments TPS2231MRGPR-3 ExpressCard™ power switch, 45 mOhm Rds(on), 1.3 A per output, 3 high-side outputs, dual-rail 1.5 V / 3.3 V load, Power Good & Status Flag, 20-VFQFN exposed pad, -40 to 85 °C.

$1.7460Ref. price · indicative, final on quote
Texas Instruments TPS2231MRGPR-3 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TPS2231MRGPR-3 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
Case20-VFQFN Exposed Pad
Fault protectionCurrent Limiting (Fixed), Over Temperature
Output configurationHigh Side
Ratio - Input:Output1:1

Product details

ExpressCard slot power — three independent high-side outputs

The Texas Instruments TPS2231MRGPR-3 is a dedicated ExpressCard™ power switch that delivers three independent high-side outputs, each rated for 1.3 A maximum, from a 20-VFQFN exposed-pad package. It handles the dual-rail ExpressCard requirement directly: the 3.3 V rail for VCC and the 1.5 V rail for VPP, with a typical on-resistance of 45 mOhm per channel.

45 mOhm Rds(on) — thermal budget in a 4x4 QFN

At 1.3 A per output, the 45 mOhm typical on-resistance produces roughly 76 mW of conduction loss per channel — about 230 mW total with all three outputs active. The 20-QFN with exposed pad (4x4 mm) dissipates this comfortably with a proper thermal via pattern to the ground plane. The fixed current-limiting and over-temperature fault protection prevent the switch from exceeding its SOA during a short-circuit event; the Status Flag output alerts the host controller so it can sequence a power-down.

Frequently asked questions

Is TPS2231MRGPR-3 obsolete or end-of-life?

No.

What is the closest pin-compatible alternative to TPS2231MRGPR-3?

The base product number TPS2231 covers multiple package and temperature variants; the MRGPR-3 suffix specifies the 20-QFN (4x4) package and Tape & Reel delivery.

What are the key features of the TPS2231MRGPR-3?

The switch includes Power Good and Status Flag outputs for system-level fault monitoring, fixed current limiting and over-temperature protection, and operates from a 1.5 V / 3.3 V dual-rail load without requiring a separate Vcc/Vdd supply.