component
LM34927MR
Public Made by Adomby adom
Texas Instruments DC-DC Converters, SO-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM34927MR
Texas Instruments · DC-DC Converters · SO-8
LM34927MR from Texas Instruments, in a SO-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | RTN | power_in | Ground connection of the integrated circuit; the exposed pad must be connected to this pin. |
| 2 | VIN | power_in | Input voltage with an operating input range of 7.5 V to 100 V; the RON resistor connects between this pin and RON to set on-time. |
| 3 | UVLO | input | Input to the undervoltage comparator; a resistor divider from VIN to UVLO to GND sets the undervoltage threshold, and pulling it below 0.66 V externally puts the part in shutdown. |
| 4 | RON | input | On-time control; a resistor between this pin and VIN sets the switch on-time as a function of VIN, with a minimum recommended on-time of 100 ns at maximum input voltage. |
| 5 | FB | input | Feedback pin connected to the inverting input of the internal regulation comparator, with a regulation level of 1.225 V. |
| 6 | VCC | power_out | Output of the internal high-voltage series pass regulator, regulated at 7.6 V, which biases the gate drivers and internal circuitry and requires a 1.0 µF decoupling capacitor. |
| 7 | BST | input | Bootstrap pin; a 0.01 µF ceramic capacitor is required between BST and SW, charged by VCC through an internal diode when SW is low. |
| 8 | SW | output | Power switching node that connects to the output inductor and the bootstrap capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SO-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM34927MR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files:
lm34927mr-etched.step/lm34927mr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm34927mr.step/lm34927mr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (34 pp, sha256
d9409c664f8b501b, retrieved 2026-10-08, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).