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Texas Instruments TPS62042DGQRG4 — Power Management (PMIC / Gate Driver)

Texas Instruments TPS62042DGQRG4 Step-Down Converter

MPNTPS62042DGQRG4
End of Life

Texas Instruments TPS62042DGQRG4, step-down (buck) DC-DC converter, fixed 1.5V output, 1.2A, 1.25MHz switching, synchronous rectification, 10-HVSSOP package, -40°C to 85°C.

Texas Instruments TPS62042DGQRG4 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TPS62042DGQRG4 specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Voltage - input2.5V
Voltage - output (Min (Fixed))1.5V
Output current1.2A
Frequency - switching1.25MHz
I/O channels1
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR)
FunctionStep-Down
TopologyBuck
Case10-PowerTFSOP, 10-MSOP (0.118\", 3.00mm Width)
Output configurationPositive
Synchronous rectifierYes

Product details

Fixed 1.5V rail — the BOM voltage this part serves

The Texas Instruments TPS62042DGQRG4 is a synchronous step-down (buck) converter with a fixed 1.5V output, rated for 1.2A continuous load.

1.25MHz switching — inductor selection and ripple

Switching at 1.25MHz allows the use of small-value inductors (typically 2.2 µH to 4.7 µH range), keeping the overall power-stage footprint compact. The trade-off is higher switching losses compared to a 500 kHz part — expect efficiency in the mid-80s to low-90s percent range depending on load, typical for this frequency class. The internal low-side FET replaces the catch diode, a standard feature for modern step-down converters at this current level.

Housed in the 10-HVSSOP (PowerPAD) package — a 3.00 mm × 3.00 mm body with an exposed thermal pad on the bottom.

Frequently asked questions

What are typical applications for the TPS62042DGQRG4?

As a 1.2A step-down converter with a 1.5V fixed output, it is suited for powering low-voltage digital cores, I/O rails, or memory supplies in battery-powered handhelds, industrial sensors, and embedded control boards where the input comes from a 3.3V or 5V bus.