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TPS62933PDRLR

Texas Instruments

Texas Instruments TPS62933PDRLR, Buck, Step-Down, Adjustable Output, 3 A, 200 kHz to 2.2 MHz, SOT-583, Surface Mount, -40°C to 150°C.

Texas Instruments TPS62933PDRLR
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[IN STOCK] In Stock: 1,660 pcs
$1.25/ pc

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MOQ 1 · Tape & Reel (TR); Cut Tape (CT) · RoHS · EIA-481 · DAP/DDP · T/T

[ORIGINAL SEALED] [PRE-SHIP HD PHOTOS] [30D WARRANTY · COC] [TRACKED DAP/DDP]

Technical specifications

TPS62933PDRLR specifications
Parameter / AttributeSpecification / Value
Output typeAdjustable
MountingSurface Mount
Voltage - input3.8V
Voltage - output22V
Voltage - output (Min (Fixed))0.8V
Output current3A
Frequency - switching200kHz ~ 2.2MHz
I/O channels1
Operating temperature-40°C~150°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionStep-Down
TopologyBuck
CaseSOT-583
Output configurationPositive
Synchronous rectifierYes
100% Footprint Match · Solder-Ready (No PCB Redesign Needed)

Need Stock or a Drop-in Second-Source for TPS62933PDRLR?

Package: SOT-23-THIN-6 (DDC) · Pin-compatible replacements with immediate Shenzhen spot stock

Footprint Match 98%
Supply Chain & Allocation Reality:

The TPS54302 is the modern tiny buck of industrial and consumer boards - 4.5V to 28V input, 3A output, SOT-23-THIN-6, with the EMI spread-spectrum and light-load pulse-skipping that certificate-bound designs lean on. Inside the TI family the substitution is easy and documented: the 2A/3A/4A members are pin-to-pin. Outside the family the SOT-23-6 outline is a siren call - dozens of parts from six-plus manufacturers share the body, and very few survive the four questions that separate a functional replacement from a BOM line that fails EMI retest or drops out under light load.

Verified Pin-Compatible Replacements (3 verified alternatives)

TPS54202 Texas Instruments SOT-23-THIN-6 (DDC)
Pin-to-Pin (Minor Clock/Init Tuning)
Availability & Target Pricing:

The 2A Member of the Same Ladder

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

Pin-to-pin sibling rated 2A instead of 3A, same 400kHz class fixed frequency, peak current mode and the same light-load architecture.

Same 4.5V to 28V input envelope; the output current ceiling is the difference.

Compatibility & Drop-In Notes: The safe direction is down only with the load budget checked: a 2A part in a 3A socket is a thermal plan, not a substitution. As a documented same-family swap it is otherwise clean.
Package & Solder Footprint: Identical DDC land pattern and pinout - the family was designed as one layout scaled by current.
Shenzhen Warehouse Stock & MOQ: Stocked across the ladder; quote the grade the load actually needs.
Request Volume Quote for TPS54202 Compare TPS62933PDRLR vs TPS54202 Spec Matrix
TPS54308 Texas Instruments SOT-23-THIN-6 (DDC)
Pin-to-Pin (Minor Clock/Init Tuning)
Availability & Target Pricing:

Same Footprint, Different Light-Load Behavior

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The same six-pin footprint at a fixed 350kHz in forced-continuous-conduction mode: no pulse-skipping at light load, no spread-spectrum EMI feature.

Same input range class; check the datasheet figures for the exact grade.

Compatibility & Drop-In Notes: The classic gotcha of this family: pin-identical, behaviorally different. In a battery or standby design the 54308 runs hotter at light load; in an EMI-certified design it loses the spread-spectrum the certificate may lean on. Check both before the swap.
Package & Solder Footprint: Identical DDC pinout.
Shenzhen Warehouse Stock & MOQ: Stocked as the FCCM option for noise-sensitive loads that disliked pulse-skipping.
Request Volume Quote for TPS54308 Compare TPS62933PDRLR vs TPS54308 Spec Matrix
TPS62933 Texas Instruments SOT-583
Functional Equivalent
Availability & Target Pricing:

The Modern Successor - Board Revision Included

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

TIs current recommended alternate: 3.8V to 30V input, 3A, lower quiescent current and higher switching frequency for smaller passives.

Wider input window; modern low-Iq design point.

Compatibility & Drop-In Notes: The honest sentence: the 62933 replaces the 54302 in a design review, not in a socket. SOT-583 is a different land pattern; where a repair needs the board to stay, stay on the DDC family.
Package & Solder Footprint: SOT-583 against SOT-23-THIN-6 - different footprint.
Shenzhen Warehouse Stock & MOQ: Active TI production; stocked for redesign builds.
Request Volume Quote for TPS62933 Compare TPS62933PDRLR vs TPS62933 Spec Matrix
Buyer & Quality Checklist for Sourcing Alternatives
  • The four questions before any SOT-23-6 buck swap: switching frequency (sets the inductor), control architecture (peak current mode against voltage-mode or COT), light-load mode (pulse-skipping against forced continuous), and EMI features (spread spectrum present or not). A part that fails any of the four is a board project, not a BOM substitution.
  • Inside the TPS54202/54302/4A ladder the swap is documented pin-to-pin; choose the current grade against the real load and thermal plan, not the datasheet headline.
  • TPS54308 shares the footprint but runs FCCM without spread spectrum - the two visible deltas are light-load efficiency and conducted EMI.
  • Beware lookalikes: the six-pin outline is shared by dozens of parts across manufacturers; most differ in at least one of the four questions. Verify each against the datasheet, never by package photo.
  • On repair, check the passive network first: the inductor value and the feedback divider are tuned to the specific part. A substitution with a different frequency or reference voltage silently changes the output.
  • Ripple and thermal budget scale with frequency: when the substitution changes fsw, re-check the output ripple and the inductor saturation at the highest ambient the board sees.
Frequently Asked Technical Questions

Q: Is TPS54202 pin-compatible with TPS54302?

A: Yes - the 2A and 3A members of the TIs six-pin SOT-23-6 buck ladder are pin-to-pin on the same layout, as is the 4A member. Substitute downward only with the load and thermal budget checked.

Q: Can TPS54308 replace TPS54302?

A: Same footprint and pinout, different behavior: the 54308 runs forced-continuous at about 350kHz without the 54302 spread-spectrum EMI feature. Fine as a substitution where ripple and light-load efficiency allow; verify EMI and standby budgets first.

Q: Why do other SOT-23-6 bucks not just work?

A: Because the package is not the design: frequency, control loop, light-load mode and EMI behavior all live inside the six pins. A lookalike with a different control architecture changes the loop compensation and the transient response even when it physically fits.

Technical details

Buck regulator in a small SOT-583 — what it covers

The Texas Instruments TPS62933PDRLR is a synchronous step-down (buck) regulator delivering up to 3 A from a 3.8 V to 30 V input rail. The switching frequency is programmable between 200 kHz and 2.2 MHz via a single resistor to ground, letting you balance efficiency against inductor size and EMI filter design. Internal synchronous rectification eliminates the freewheeling Schottky diode, shrinking the BOM count and improving light-load efficiency. The SOT-583 package keeps the footprint small — useful when board area is tight, as in automotive ECU modules, industrial sensors, or distributed power architectures.

Switching frequency — the efficiency vs. size trade-off

The programmable frequency from 200 kHz to 2.2 MHz lets you choose: lower frequencies reduce switching losses (better efficiency at heavy load) but require larger inductors and output capacitors; higher frequencies shrink the passives and push switching harmonics above the AM band, easing EMI compliance. The RT pin resistor sets the frequency per the datasheet curve. Note that the upper end (2.2 MHz) may conflict with sensitive RF bands if the layout is not shielded — plan your PCB stack-up accordingly.

ROHS3 compliance is confirmed. For new designs, this part is a safe selection from a lifecycle standpoint — no imminent obsolescence risk.

TPS62933PDRLR
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