# MAX6126B21+

**Maxim Integrated** · Voltage References · MSOP-8

MAX6126B21+ from Maxim Integrated, in a MSOP-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 | NR | passive | Noise reduction pin: connect a 0.1µF capacitor to improve wideband noise (60nV/√Hz to 35nV/√Hz at 2.048V output), or leave unconnected if not used. |
| 2 | IN | power_in | Positive power-supply input, which must be within (VOUT + 200mV) to 12.6V for specified operation (absolute maximum +13V). |
| 3 | GND | power_in | Ground reference for the device; all voltages are referenced to GND. |
| 4 | GNDS | power_in | Ground-sense connection for Kelvin sensing: connect to the ground connection at the load, with GNDS limited to -0.3V to +0.3V. |
| 5 | I.C. | unconnected | Internally connected: do not connect anything to this pin. |
| 6 | OUTS | output | Voltage reference sense output, which regulates the voltage at the load and should be shorted to OUTF as close to the load as possible; limited to -0.3V to the lesser of (VIN + 0.3V) or +6V. |
| 7 | OUTF | power_out | Voltage reference force output that supplies load current; bypass with a 0.1µF to 10µF capacitor to GND, placed as close to OUTF as possible, and limited to -0.3V to the lesser of (VIN + 0.3V) or +6V. |
| 8 | I.C. | unconnected | Internally connected: do not connect anything to this pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Maxim Integrated |
| Package | MSOP-8 |
| Category | Power Management ICs |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output Voltage Accuracy (B grade, µMAX) |  | -0.1 |  | 0.1 | % | Referred to VOUT, TA = +25°C | 2 |
| Output Voltage Temperature Coefficient (B grade, µMAX) | TCVOUT |  | 2 | 7 | ppm/°C | TA = -40°C to +85°C | 2 |
| Output Voltage Temperature Coefficient (B grade, µMAX) | TCVOUT |  | 3 | 12 | ppm/°C | TA = -40°C to +125°C | 2 |
| Line Regulation (B grade, µMAX) | ΔVOUT/ΔVIN |  | 2 | 20 | µV/V | 2.7V ≤ VIN ≤ 12.6V, TA = +25°C | 2 |
| Line Regulation (B grade, µMAX) | ΔVOUT/ΔVIN |  |  | 40 | µV/V | TA = -40°C to +125°C | 2 |
| Load Regulation Sourcing (B grade, µMAX) | ΔVOUT/ΔIOUT |  | 0.7 | 25 | µV/mA | Sourcing: 0 ≤ IOUT ≤ 10mA | 2 |
| Load Regulation Sinking (B grade, µMAX) | ΔVOUT/ΔIOUT |  | 1.3 | 25 | µV/mA | Sinking: -10mA ≤ IOUT ≤ 0 | 2 |
| Output Short-Circuit Current | ISC |  | 160 |  | mA | Short to GND | 2 |
| Output Short-Circuit Current | ISC |  | 20 |  | mA | Short to IN | 2 |
| Thermal Hysteresis (µMAX) | ΔVOUT/cycle |  | 80 |  | ppm | µMAX package; cycled TMAX to TMIN, measured at TA = +25°C | 2 |
| Long-Term Stability (µMAX) | ΔVOUT/time |  | 100 |  | ppm/1000hr | 1000hr at TA = +25°C, µMAX | 2 |
| Noise Voltage 0.1Hz to 10Hz | eOUT |  | 1.3 |  | µVP-P | f = 0.1Hz to 10Hz | 3 |
| Noise Voltage Density | eOUT |  | 60 |  | nV/√Hz | f = 1kHz, CNR = 0 | 3 |
| Noise Voltage Density | eOUT |  | 35 |  | nV/√Hz | f = 1kHz, CNR = 0.1µF | 3 |
| Turn-On Settling Time | tR |  | 0.8 |  | ms | To VOUT = 0.01% of final value, CNR = 0 | 3 |
| Turn-On Settling Time | tR |  | 20 |  | ms | To VOUT = 0.01% of final value, CNR = 0.1µF | 3 |
| Capacitive-Load Stability Range | CLOAD | 0.1 |  | 10 | µF | No sustained oscillations | 3 |
| Supply Voltage Range | VIN | 2.7 |  | 12.6 | V | Guaranteed by line-regulation test | 3 |
| Quiescent Supply Current | IIN |  | 380 | 550 | µA | TA = +25°C | 3 |
| Quiescent Supply Current | IIN |  |  | 725 | µA | TA = -40°C to +125°C | 3 |
| IN Pin Voltage (absolute maximum) | IN | -0.3 |  | 13 | V | Referenced to GND | 2 |
| GNDS Pin Voltage (absolute maximum) | GNDS | -0.3 |  | 0.3 | V | Referenced to GND | 2 |
| OUTF, OUTS, NR Pin Voltage (absolute maximum) | OUTF, OUTS, NR | -0.3 |  | 6 | V | Referenced to GND; upper limit is the lesser of (VIN + 0.3V) or +6V | 2 |
| Output Short-Circuit Duration (absolute maximum) |  |  |  | 60 | s | Output short circuit to GND or IN | 2 |
| Operating Temperature Range |  | -40 |  | 125 | °C |  | 2 |
| Junction Temperature (absolute maximum) | TJ |  |  | 150 | °C |  | 2 |
| Storage Temperature Range (absolute maximum) | TSTG | -65 |  | 150 | °C |  | 2 |
| Lead Temperature (absolute maximum) |  |  |  | 300 | °C | Soldering, 10s | 2 |
| Soldering Temperature, reflow (absolute maximum) |  |  |  | 260 | °C | Reflow | 2 |

## CAD (KiCad official)

- Symbol: `MAX6126B21+`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `max6126b21-etched.step` / `max6126b21-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `max6126b21.step` / `max6126b21.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Maxim Integrated datasheet](https://www.analog.com/media/en/technical-documentation/data-sheets/max6126.pdf) (28 pp, sha256 `54fe36ef3780afd6`, retrieved 2026-10-28, tier: manufacturer)
- **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](docs/max6126b21-datasheet.pdf)