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LV3842XFDBVR

Public Made by Adom

by adom

TEXAS INSTRUMENTS Global Sourcing Parts, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LV3842XFDBVR

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lv3842xfdbvr.step / lv3842xfdbvr.glb are 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, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF