component
LM2842YM6-ADJ
Public Made by Adomby adom
HGSEMI DC-DC Converters, SOT-23-6. 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
markdownLM2842YM6-ADJ
HGSEMI · DC-DC Converters · SOT-23-6
LM2842YM6-ADJ from HGSEMI, 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 | BST | power_out | Bootstrap pin supplying the positive rail of the internal floating high-side MOSFET driver; a bypass capacitor is connected between BST and SW, and the datasheet limits BST-to-SW to -0.3 V to 6.0 V. |
| 2 | GND | power_in | Ground pin, to be connected as close as possible to the output capacitor and kept away from the high-current switching path. |
| 3 | FB | input | Feedback input to the error amplifier, compared against the internal +0.8 V reference through an external resistor divider from VOUT to GND; the reference is 0.794 V typical (0.778 V to 0.810 V). |
| 4 | EN | input | Enable input, active high with a 1.6 V minimum threshold and 0.6 V hysteresis; pulling it below the threshold shuts the chip down, and leaving it floating shuts the chip down (EN is internally pulled to ground); EN is clamped at 7.5 V. |
| 5 | VIN | power_in | Power input supplying all internal control circuitry and the power switch, with a recommended operating range of 5 V to 40 V and an absolute maximum of -0.3 V to 43 V; a decoupling capacitor to GND is required to reduce switching spikes. |
| 6 | SW | output | High-side switch output that drives the inductor; a low-VF Schottky diode to GND should be placed close to this pin to reduce switching spikes, with the switch voltage limited to -0.3 V to VIN(max)+0.3 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOT-23-6 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Feedback voltage | Vfb | 0.778 | 0.794 | 0.81 | V | 5 | |
| Oscillator frequency (LM2842Y version) | Fosc | 0.95 | 1.25 | 1.5 | MHz | LM2842Y version | 5 |
| Input undervoltage lockout threshold | Vin(UVLO) | 3.3 | 4.2 | V | 5 | ||
| Switch leakage current | Iswleak | 0.1 | 1 | uA | Ven=0V, Vsw=0V | 5 | |
| Shutdown supply current | Isd | 3 | 15 | uA | Ven<0.3V | 5 | |
| EN high-level threshold | Venh | 1.6 | 2 | V | 5 | ||
| Supply voltage (VIN) | VIN | 5 | 40 | V | 4 | ||
| SW terminal voltage | VOUT | 40 | V | Printed as 'Up to 40V' | 4 | ||
| Operating junction temperature | TJ | -40 | 125 | °C | 4 | ||
| Operating ambient temperature | TA | -40 | 85 | °C | 4 | ||
| Supply voltage VIN (absolute) | VIN | -0.3 | 43 | V | 4 | ||
| Switch voltage VSW (absolute) | VSW | -0.3 | V | Upper limit printed as VIN(MAX)+0.3V; not a numeric value | 4 | ||
| BST to SW voltage | VBST-SW | -0.3 | 6 | V | 4 | ||
| Other pins voltage | -0.3 | 5 | V | 4 | |||
| Continuous power dissipation | PD | 0.57 | W | TA=+25°C | 4 | ||
| Junction temperature | 150 | °C | 4 | ||||
| Storage temperature | -65 | 150 | °C | 4 | |||
| Lead soldering temperature | 245 | °C | 10 s | 4 | |||
| Thermal resistance junction to ambient | θJA | 220 | °C/W | SOT-23-6 | 4 | ||
| Thermal resistance junction to case | θJC | 110 | °C/W | SOT-23-6 | 4 | ||
| Switch on-resistance | Rsw | 500 | mΩ | Vbst-Vsw=5V | 5 | ||
| Current limit | Ilim | 1 | A | 5 | |||
| Transconductance COMP to SENSE | Gcs | 3 | A/V | 5 | |||
| Minimum operating voltage | Vin min | 4.2 | V | 5 | |||
| UVLO hysteresis | Vin(UVLO)hys | 0.8 | V | 5 | |||
| Soft-start time | Tss | 0.5 | msec | FB from 0 to 1.8V | 5 | ||
| Minimum switch on-time | Ton min | 100 | ns | 5 | |||
| Quiescent current | Isq | 200 | uA | Vfb=0.9V, no load | 5 | ||
| Thermal shutdown temperature | Temp | 150 | °C | 5 | |||
| EN hysteresis | En hys | 0.6 | V | 5 | |||
| EN clamp voltage | En Vclamp | 7.5 | V | 5 |
CAD (KiCad official)
- Symbol:
LM2842YM6-ADJ - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
lm2842ym6-adj-etched.step/lm2842ym6-adj-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2842ym6-adj.step/lm2842ym6-adj.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (12 pp, sha256
ce9d68e77800fd77, 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).