component
LD2985BM28R
Public Made by Adomby adom
STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. 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
markdownLD2985BM28R
STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L
LD2985BM28R from STMicroelectronics, in a SOT-23-5L. 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 | IN | power_in | Input port; the operating input voltage is 2.5 V to 16 V and the DC input voltage is rated -0.3 V to 16 V. |
| 2 | GND | power_in | Ground pin. |
| 3 | INHIBIT | input | Control switch ON/OFF; inhibit is not internally pulled-up and cannot be left floating, and the device is disabled when this pin is connected to GND or to a positive voltage less than 0.18 V. |
| 4 | Bypass | passive | Bypass pin: capacitor to be connected to GND to improve the thermal noise performance. |
| 5 | OUT | power_out | Output port. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23-5L |
| Category | Power Management (PMIC) |
| Pins | 5 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating input voltage | VOP | 2.5 | 16 | V | 6 | ||
| Output voltage | VO | 2.73 | 2.8 | 2.87 | V | VI = 3.8 V | 6 |
| Output voltage | VO | 2.716 | 2.884 | V | IO = 1 to 150 mA | 6 | |
| Output voltage | VO | 2.688 | 2.912 | V | IO = 1 to 150 mA, TJ = -40 to 125 °C | 6 | |
| Load regulation | 20 | mV | IO = 1 to 150 mA, TJ = -40 to 125 °C | 6 | |||
| Short-circuit current | ISC | 400 | mA | RL = 0 | 6 | ||
| Line regulation | ΔVO/ΔVI | 0.003 | 0.014 | %/V | VI = VO + 1 V to 16 V, IO = 1 mA | 6 | |
| Line regulation | ΔVO/ΔVI | 0.032 | %/V | VI = VO + 1 V to 16 V, IO = 1 mA, TJ = -40 to 125 °C | 6 | ||
| Dropout voltage | VDROP | 1 | 3 | mV | IO = 0 | 7 | |
| Dropout voltage | VDROP | 5 | mV | IO = 0, TJ = -40 to 125 °C | 7 | ||
| Dropout voltage | VDROP | 7 | 10 | mV | IO = 1 mA | 7 | |
| Dropout voltage | VDROP | 15 | mV | IO = 1 mA, TJ = -40 to 125 °C | 7 | ||
| Dropout voltage | VDROP | 40 | 60 | mV | IO = 10 mA | 7 | |
| Dropout voltage | VDROP | 90 | mV | IO = 10 mA, TJ = -40 to 125 °C | 7 | ||
| Dropout voltage | VDROP | 120 | 150 | mV | IO = 50 mA | 7 | |
| Dropout voltage | VDROP | 225 | mV | IO = 50 mA, TJ = -40 to 125 °C | 7 | ||
| Dropout voltage | VDROP | 280 | 350 | mV | IO = 150 mA | 7 | |
| Dropout voltage | VDROP | 575 | mV | IO = 150 mA, TJ = -40 to 125 °C | 7 | ||
| Quiescent current ON mode | IQ | 80 | 100 | µA | IO = 0 | 7 | |
| Quiescent current ON mode | IQ | 150 | µA | IO = 0, TJ = -40 to 125 °C | 7 | ||
| Quiescent current ON mode | IQ | 100 | 150 | µA | IO = 1 mA | 7 | |
| Quiescent current ON mode | IQ | 200 | µA | IO = 1 mA, TJ = -40 to 125 °C | 7 | ||
| Quiescent current ON mode | IQ | 200 | 300 | µA | IO = 10 mA | 7 | |
| Quiescent current ON mode | IQ | 400 | µA | IO = 10 mA, TJ = -40 to 125 °C | 7 | ||
| Quiescent current ON mode | IQ | 600 | 900 | µA | IO = 50 mA | 7 | |
| Quiescent current ON mode | IQ | 1200 | µA | IO = 50 mA, TJ = -40 to 125 °C | 7 | ||
| Quiescent current ON mode | IQ | 2000 | 3000 | µA | IO = 150 mA | 7 | |
| Quiescent current ON mode | IQ | 4000 | µA | IO = 150 mA, TJ = -40 to 125 °C | 7 | ||
| Quiescent current OFF mode | IQ | 0 | µA | VINH < 0.18 V | 7 | ||
| Quiescent current OFF mode | IQ | 2 | µA | VINH < 0.18 V, TJ = -40 to 125 °C | 7 | ||
| Supply voltage rejection | SVR | 45 | dB | CBYP = 0.01 µF, CO = 10 µF, f = 1 kHz | 7 | ||
| Inhibit input logic low | VIL | 0.15 | V | TJ = -40 to 125 °C | 7 | ||
| Inhibit input logic high | VIH | 2 | V | TJ = -40 to 125 °C | 7 | ||
| Inhibit input current | IINH | 5 | 15 | µA | VINH = 0 V, TJ = -40 to 125 °C | 7 | |
| Inhibit input current | IINH | 0 | -1 | µA | VINH = 5 V, TJ = -40 to 125 °C | 7 | |
| Output noise voltage | eN | 30 | µV | B = 300 Hz to 50 kHz, CBYP = 0.01 µF, CO = 10 µF | 7 | ||
| DC input voltage | VI | -0.3 | 16 | V | 5 | ||
| INHIBIT input voltage | VINH | -0.3 | 16 | V | 5 | ||
| Storage temperature range | TSTG | -65 | 150 | °C | 5 | ||
| Operating junction temperature range | TOP | -40 | 125 | °C | 5 | ||
| Thermal resistance junction-case | RthJC | 81 | °C/W | 4 | |||
| Thermal resistance junction-ambient | RthJA | 255 | °C/W | 4 |
CAD (KiCad official)
- Symbol:
LD2985BM28R - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files:
ld2985bm28r-etched.step/ld2985bm28r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ld2985bm28r.step/ld2985bm28r.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (18 pp, sha256
19d9fa271cb4bebe, retrieved 2026-11-05, tier: manufacturer) - 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).