TI AUTOMOTIVE · PART DECISION PAGE

TPS7B81-Q1

150mA, 40V automotive LDO

An automotive LDO for low-current rails with 2.7 µA typical light-load quiescent current. Its 40V input rating does not support a nominal 48V bus; calculate dissipation before selecting current and package.

AutomotiveActiveExample package: HVSSOP (DGN) · 8 pinVerified 2026-11-06

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5-second verdict

AutomotiveAEC-Q100 Grade 1

Temperature−40°C to +125°C (TA); +150°C (TJ)

Functional safetyFunctional Safety-Capable

LifecycleActive

In one sentence: Qualification is grounded in this TI product's documentation; no grade is inferred from temperature. An ordering table may show junction or variant-specific limits, which must be distinguished from ambient conditions. TI explicitly lists Functional Safety-Capable. This is a device-documentation category, not system ASIL certification; assess the exact function, assumptions and safety manual.

Key specifications

Input range3–40 V

Maximum output current150 mA; thermal limits apply

Light-load IQ (typical)2.7 µA

Fixed output options2.5 V / 3.3 V / 5 V; OPN dependent

Stability capacitor1–200 µF; ESR conditions apply

Orderable variants (OPNs)

The GPN is for selection; the full OPN is for ordering. These examples were observed on the verification date, not live stock. Variants may differ in package, temperature, gain/threshold and, for PMICs, NVM/sequencing. Distinguish TA from TJ in the exact datasheet.

OPN	Package	Temperature	Note
TPS7B8125QDGNRQ1	HVSSOP (DGN) · 8 pin	-40 to +150°C (TI OPN listing; verify TA/TJ)	Verify exact OPN, temperature definition and revision; not a stock claim.
TPS7B8133QDGNRQ1	HVSSOP (DGN) · 8 pin	-40 to +150°C (TI OPN listing; verify TA/TJ)	Verify exact OPN, temperature definition and revision; not a stock claim.
TPS7B8133QDRVRQ1	WSON (DRV) · 6 pin	-40 to +150°C (TI OPN listing; verify TA/TJ)	Verify exact OPN, temperature definition and revision; not a stock claim.
TPS7B8133QKVURQ1	TO-252 (KVU) · 5 pin	-40 to +150°C (TI OPN listing; verify TA/TJ)	Verify exact OPN, temperature definition and revision; not a stock claim.
TPS7B8133QWDRVRQ1	WSON (DRV) · 6 pin	-40 to +150°C (TI OPN listing; verify TA/TJ)	Verify exact OPN, temperature definition and revision; not a stock claim.
TPS7B8150QDGNRQ1	HVSSOP (DGN) · 8 pin	-40 to +150°C (TI OPN listing; verify TA/TJ)	Verify exact OPN, temperature definition and revision; not a stock claim.
TPS7B8150QDRVRQ1	WSON (DRV) · 6 pin	-40 to +150°C (TI OPN listing; verify TA/TJ)	Verify exact OPN, temperature definition and revision; not a stock claim.
TPS7B8150QKVURQ1	TO-252 (KVU) · 5 pin	-40 to +150°C (TI OPN listing; verify TA/TJ)	Verify exact OPN, temperature definition and revision; not a stock claim.

TPS7B8125QDGNRQ1-40 to +150°C (TI OPN listing; verify TA/TJ)

HVSSOP (DGN) · 8 pinVerify exact OPN, temperature definition and revision; not a stock claim.

TPS7B8133QDGNRQ1-40 to +150°C (TI OPN listing; verify TA/TJ)

HVSSOP (DGN) · 8 pinVerify exact OPN, temperature definition and revision; not a stock claim.

TPS7B8133QDRVRQ1-40 to +150°C (TI OPN listing; verify TA/TJ)

WSON (DRV) · 6 pinVerify exact OPN, temperature definition and revision; not a stock claim.

TPS7B8133QKVURQ1-40 to +150°C (TI OPN listing; verify TA/TJ)

TO-252 (KVU) · 5 pinVerify exact OPN, temperature definition and revision; not a stock claim.

TPS7B8133QWDRVRQ1-40 to +150°C (TI OPN listing; verify TA/TJ)

WSON (DRV) · 6 pinVerify exact OPN, temperature definition and revision; not a stock claim.

TPS7B8150QDGNRQ1-40 to +150°C (TI OPN listing; verify TA/TJ)

HVSSOP (DGN) · 8 pinVerify exact OPN, temperature definition and revision; not a stock claim.

TPS7B8150QDRVRQ1-40 to +150°C (TI OPN listing; verify TA/TJ)

WSON (DRV) · 6 pinVerify exact OPN, temperature definition and revision; not a stock claim.

TPS7B8150QKVURQ1-40 to +150°C (TI OPN listing; verify TA/TJ)

TO-252 (KVU) · 5 pinVerify exact OPN, temperature definition and revision; not a stock claim.

Official ordering page: https://www.ti.com/product/TPS7B81-Q1

Typical applications

Always-on low-power MCU supplyLow-current body-control rails

FAQ

Can it run directly from a 48V input?

Not with a 40V continuous-input rating. A 48V system needs a suitable preregulator/protection stage before evaluating this LDO.

Is 150mA continuous at any voltage drop?

No. Linear loss is approximately (VIN−VOUT)×IOUT, plus quiescent loss. Check junction temperature using the actual board thermal design.

How should I verify the TPS7B81-Q1 orderable?

The page lists 8 OPN examples from official material checked on 2026-11-06. Match package, function options and temperature definitions; obtain live price/stock from TI or authorized distributors.

Sources and verification

Related selection and design checks

All selection guides →What does TI Q1 mean →AEC-Q100 grades →Model Y TI BOM →

NuAxi is an independent semiconductor market-intelligence platform and is not affiliated with Texas Instruments. Information is for selection reference only and is not a design, certification or procurement guarantee; verify against TI's official datasheet, ordering page and terms.