Exact device and ordering identity
TPSM86838RCGR is TI’s 8 A power module for 4.5–28 V input rails, integrating the inductor, power MOSFETs and basic passives in a 19-terminal HotRod package. It is the FCCM member of the TPSM8683x family; the related TPSM86837 uses Eco-mode. This distinction matters for light-load efficiency and ripple requirements even where the nominal input/output ranges overlap.
Operating and control considerations
The adjustable 0.6–5.5 V output range must be reviewed against the VIN headroom and 8 A continuous-current thermal envelope. FCCM maintains continuous-conduction behavior at lighter loads and is relevant when output ripple is a priority, whereas the Eco-mode alternative aims at improved light-load efficiency. A selected switching frequency of 800 kHz or 1.2 MHz also changes EMI, thermal and passive-component decisions.
Package, sourcing and engineering trade-offs
The catalog B3QFN-19(5×5.5) label identifies the supplied form but does not replace the original RCG 19-pin HotRod land-pattern drawing. The module’s integrated inductor simplifies part count, not proper thermal design. Do not infer that its 8 A capability is guaranteed at all input/output combinations or PCB operating temperatures.
Manufacturer-verified selection specifications
| Selection parameter | TI-verified value | Engineering condition |
|---|---|---|
| Function | 8A synchronous buck power module | Integrated inductor/FETs |
| Input voltage | 4.5–28V | Recommended VIN |
| Vout | 0.6–5.5V | Resistor-adjusted output |
| Current | 8A continuous | Thermal/board limits |
| Mode | FCCM TPSM86838 | Do not conflate with TPSM86837 Eco-mode |
| Freq | 800kHz or 1200kHz selected | Two discrete settings; EMI/efficiency choice |
| Pkg | 19pin 5.0×5.5mm RCG B3QFN | TI HotRod footprint distinct from generic B3QFN |
| Catalog package | B3QFN-19(5×5.5) | Match exact TI mechanical drawing before footprint or replacement approval |
Procurement and datasheet
Request a quotation for TPSM86838RCGR using the complete orderable number, target quantity and package requirement. Stock, pricing and delivery timing are not guaranteed by this product page. Source-listed alternative candidates, where present, are for engineering evaluation and do not establish drop-in compatibility.
