Skip to main content
Log in
Texas Instruments TPS62403DRCT — DC-DC Power Modules

TPS62403DRCT Dual Buck Regulator, 2.25 MHz, 400/600 mA

MPNTPS62403DRCT
Active

Texas Instruments TPS62403DRCT, Dual Step-Down Buck Converter, 2.25 MHz, 400 mA + 600 mA Outputs, Programmable Fixed Output, 10-VSON (3x3 mm), -40°C to 85°C, Active.

$2.0000Ref. price · indicative, final on quote
Texas Instruments TPS62403DRCT datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TPS62403DRCT specifications
ParameterValue
Output typeProgrammable (Fixed)
MountingSurface Mount
Voltage - input2.5V
Voltage - output (Min (Fixed))1.1V, 1.575V (2.8V)
Output current400mA, 600mA
Frequency - switching2.25MHz
I/O channels2
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionStep-Down
TopologyBuck
Case10-VFDFN Exposed Pad
Output configurationPositive
Synchronous rectifierYes

Product details

Dual-rail supply in a 3x3 mm footprint

One channel is rated for 400 mA, the other for 600 mA continuous output — a pairing sized for a low-power SoC core (1.1 V) and its I/O or analog rail (1.575 V or 2.8 V) in a single 10-VSON package.

Switching at 2.25 MHz — inductor sizing trade-off

The 2.25 MHz switching frequency lets you use 1 µH to 2.2 µH inductors and small ceramic output capacitors, shrinking the total solution footprint. The trade-off is higher switching losses at light load — expect efficiency to peak above 90% at moderate loads and drop off below 10 mA load. For battery-powered designs where light-load efficiency matters, evaluate the PFM mode behaviour in the datasheet. Both outputs use synchronous rectification, so no external Schottky catch diode is needed. That saves a component and keeps the layout tighter, but the bottom FET's dead-time control sets the efficiency floor at very light loads.

Industrial temperature, not automotive qualified

It is not AEC-Q100 qualified, so do not route it into an under-hood or cabin automotive power tree without a waiver. The supplier device package is 10-VSON (3x3); the PCB land pattern should match the TI recommended footprint in the datasheet.

The TPS62403DRCT is the tape-and-reel variant (2,500/reel); the cut-tape option is also listed for prototype or small-run quantities.

Frequently asked questions

Is TPS62403DRCT pin-compatible with TPS62400?

Yes, the TPS62403DRCT is pin-compatible across the TPS6240x family. The difference is the fixed output voltage options: the TPS62403 has programmable fixed outputs of 1.1 V, 1.575 V, or 2.8 V, while the TPS62400 uses a different voltage set. The pinout and package (10-VSON) are identical, so you can swap without a PCB layout change.

Can TPS62403DRCT be used for dual 1.8 V and 3.3 V outputs?

Not directly with the fixed output option — the available fixed voltages are 1.1 V, 1.575 V, or 2.8 V per the output type 'Programmable (Fixed)'. To get 1.8 V and 3.3 V, you would need an adjustable-output variant in the same family or an external resistor divider if the device supports it. Confirm the feedback pin configuration in the datasheet.

What is the efficiency of TPS62403DRCT at typical output voltages?

Efficiency depends on the input-to-output differential and load current. At 3.6 V input and 1.8 V output, the device typically achieves above 90% efficiency in the 100 mA to 400 mA range. Light-load efficiency drops at 2.25 MHz due to switching losses; evaluate the PFM mode for sub-10 mA loads.