component
LV3842XFDBVR
Public Made by Adomby adom
TEXAS INSTRUMENTS Global Sourcing Parts, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Contents
README
markdownLV3842XFDBVR
TEXAS INSTRUMENTS · Global Sourcing Parts · SOT-23-6
LV3842XFDBVR from TEXAS INSTRUMENTS, in a SOT-23-6. 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 | CB | power_out | Bootstrap capacitor connection for the high-side FET driver; connect a high-quality 100 nF capacitor from this pin to the SW pin. |
| 2 | GND | power_in | Power ground terminal connected internally to the low-side FET source; connect to system ground and the ground side of CIN and COUT, keeping the path to CIN as short as possible. |
| 3 | FB | input | Feedback input to the converter, where a resistor divider sets the output voltage; never short this terminal to ground during operation. |
| 4 | EN | input | Precision enable input (High = on, Low = off) that must not float and can be tied to VIN, with adjustable UVLO set by an external resistor divider. |
| 5 | VIN | power_in | Supply input to the internal bias LDO and high-side FET, with input bypass capacitors CIN connected directly to this pin and GND; recommended range 4 V to 36 V, absolute maximum 40 V. |
| 6 | SW | power_out | Switching output of the converter, internally connected to the high-side FET source and low-side FET drain, to be connected to the power inductor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TEXAS INSTRUMENTS |
| Package | SOT-23-6 |
| Category | Global Sourcing Parts |
| Pins | 6 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| VIN operation input voltage | VIN | 4 | 36 | V | 6 | ||
| VIN UVLO rising threshold | VIN_UVLO | 3.55 | 3.75 | 4 | V | Rising threshold | 6 |
| VIN UVLO falling threshold | VIN_UVLO | 3.25 | 3.45 | 3.65 | V | Falling threshold | 6 |
| Shutdown current | ISHDN | 3 | 10 | µA | 6 | ||
| Enable rising threshold voltage | VEN_H | 1.1 | 1.23 | 1.36 | V | 6 | |
| Enable falling threshold voltage | VEN_L | 0.95 | 1.1 | 1.22 | V | 6 | |
| Leakage current at EN pin | IEN | 10 | 200 | nA | VEN = 3.3 V | 6 | |
| Reference voltage | VREF | 0.995 | 1 | 1.005 | V | TJ = 25 °C | 6 |
| Reference voltage | VREF | 0.98 | 1 | 1.02 | V | TJ = -40°C to 125°C | 6 |
| Leakage current at FB pin | IFB | 0.2 | 50 | nA | VFB = 1.2 V | 6 | |
| Recommended input voltage VIN to GND | VIN | 4 | 36 | V | 5 | ||
| Recommended FB voltage | FB | 0 | 4.5 | V | 5 | ||
| Recommended EN voltage | EN | 0 | V | 5 | |||
| Recommended output voltage | VOUT | 1 | V | 5 | |||
| Recommended output current | IOUT | 0 | 600 | mA | 5 | ||
| Operating junction temperature range | TJ | -40 | 125 | °C | 5 | ||
| VIN to GND | VIN | -0.3 | 40 | V | 5 | ||
| EN to GND | EN | -0.3 | V | 5 | |||
| FB to GND | FB | -0.3 | 5.5 | V | 5 | ||
| SW to GND | SW | -0.3 | V | 5 | |||
| SW to GND transient | SW | -3.5 | 40 | V | less than 10 ns transient | 5 | |
| CB to SW | CB | -0.3 | 5.5 | V | 5 | ||
| Junction temperature | TJ | -40 | 150 | °C | 5 | ||
| Storage temperature | Tstg | -65 | 150 | °C | 5 | ||
| Oscillator frequency | fSW | 0.935 | 1.1 | 1.265 | MHz | 7 | |
| VIN UVLO hysteresis | VIN_UVLO | 0.3 | V | 6 | |||
| Enable hysteresis voltage | VEN_HYS | 0.13 | V | 6 | |||
| Negative current limit (FPWM version) | ILS_NEG | -0.5 | A | 6 | |||
| Peak inductor current limit | IHS_LIMIT | 1.1 | A | 6 | |||
| Valley inductor current limit | ILS_LIMIT | 0.8 | A | 6 | |||
| Hiccup threshold of FB pin | VHICCUP | 40 | % of reference voltage | 6 | |||
| High-side MOSFET ON-resistance | RDS_ON_HS | 550 | mΩ | TJ = 25°C | 6 | ||
| Low-side MOSFET ON-resistance | RDS_ON_LS | 285 | mΩ | TJ = 25°C | 6 | ||
| Thermal shutdown threshold | TSHDN | 170 | °C | 6 | |||
| Thermal shutdown hysteresis | THYS | 12 | °C | 6 | |||
| Internal soft-start time | tSS | 1.8 | ms | Time of internal reference to increase from 10% to 90% of VREF, VIN = 12 V | 7 | ||
| Hiccup time | THICCUP | 135 | ms | VIN = 12 V | 7 | ||
| Minimum turn-on time | tON_MIN | 70 | ns | IOUT = 600 mA | 7 | ||
| Minimum turn-off time | tOFF_MIN | 100 | ns | IOUT = 600 mA | 7 | ||
| Maximum turn-on time | tON_MAX | 7.5 | µs | 7 | |||
| Junction-to-ambient thermal resistance | RθJA | 173 | °C/W | DBV (6 pins) | 5 | ||
| Junction-to-case (TOP) thermal resistance | RθJC_T | 116 | °C/W | DBV (6 pins) | 5 | ||
| Junction-to-case (BOTTOM) thermal resistance | RθJC_B | 31 | °C/W | DBV (6 pins) | 5 | ||
| Junction-to-top characterization parameter | ψJT | 20 | °C/W | DBV (6 pins) | 5 | ||
| Junction-to-board characterization parameter | ψJB | 30 | °C/W | DBV (6 pins) | 5 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | The SW pin connecting to the inductor must be as short as possible, and just wide enough to carry the load current without excessive heating. Short, thick traces or copper pours (shapes) must be used | 21 |
CAD (KiCad official)
- Symbol:
LV3842XFDBVR - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
lv3842xfdbvr-etched.step/lv3842xfdbvr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lv3842xfdbvr.step/lv3842xfdbvr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TEXAS INSTRUMENTS datasheet (33 pp, sha256
07a1d11a61f0cd81, retrieved 2026-10-17, 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).