# MX1210E

**Wuxi Maxinmicro** · AC-DC Controllers And Regulators · SOT-23-6

MX1210E from Wuxi Maxinmicro, 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 | GND | power_in | Ground pin. |
| 2 | FB | input | Feedback input pin; PWM duty cycle is determined by the voltage level into this pin and the CS current-sense signal, with over load protection threshold VFB_OLP of 4.0 to 4.8V and absolute maximum of -0.3 to 7V. |
| 3 | DMAG | input | Demagnetization input that senses input and output voltages from the auxiliary winding, with absolute maximum of -0.3 to 7V and valley detection at 85mV falling. |
| 4 | CS | input | Current sense pin, connect resistors to ground; absolute maximum -0.3 to 7V with 300ns leading edge blanking and 0.5V typical zero-duty current limit threshold. |
| 5 | VDD | power_in | Power supply pin with recommended range 10-48V, absolute maximum 60V, UVLO on 7.2V and off 16.5V typical. |
| 6 | GATE | output | Gate driver output for the external MOSFET, clamped at 11.5V typical. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Wuxi Maxinmicro |
| 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 |
|---|---|---|---|---|---|---|---|
| VDD supply voltage (recommended) | VDD | 10 |  | 48 | V |  | 2 |
| Power dissipation | PD |  |  | 0.59 | W | @TA=25℃ | 2 |
| VDD DC supply voltage | VDD |  |  | 60 | V |  | 2 |
| FB input voltage | FB | -0.3 |  | 7 | V |  | 2 |
| CS input voltage | CS | -0.3 |  | 7 | V |  | 2 |
| DMAG input voltage | DMAG | -0.3 |  | 7 | V |  | 2 |
| Junction temperature | TJ | -40 |  | 150 | ℃ |  | 2 |
| Ambient temperature | TA | -40 |  | 85 | ℃ |  | 2 |
| Storage temperature | TSTG | -55 |  | 150 | ℃ |  | 2 |
| ESD (HBM) | ESD | -2 |  | 2 | kV | HBM | 2 |
| Lead temperature |  |  |  | 260 | ℃ | soldering, 10secs | 2 |
| Thermal resistance junction-ambient | RθJA |  | 200 |  | ℃/W | SOT23-6 | 2 |
| VDD startup current | I startup |  | 5 | 20 | μA | VDD=UVLO_OFF-1V | 4 |
| VDD normal operation current | I_VDD |  | 2.8 | 3.3 | mA | VFB=3V | 4 |
| Burst mode operation current | I_Burst |  | 0.45 | 0.48 | mA | VFB=0.5V | 4 |
| VDD under voltage lockout enter | UVLO_ON | 6.7 | 7.2 | 7.7 | V |  | 4 |
| VDD under voltage lockout exit | UVLO_OFF | 15.5 | 16.5 | 17.5 | V |  | 4 |
| Over voltage protection voltage | VDD_OVP | 50 | 52 | 54 | V | FB=3V, VDD ramp up until gate clock is off | 4 |
| Over load protection | VFB_OLP | 4 | 4.4 | 4.8 | V |  | 4 |
| Max duty cycle | D_MAX | 70 |  | 90 | % | @ VDD=18V, VFB=3V, VCS=0.3V | 4 |
| Internal current limiting threshold voltage with zero duty cycle | VCS_PK | 0.492 | 0.5 | 0.508 | V |  | 4 |
| Secondary rectifier diode short protection threshold voltage | VCS_SRST | 1.1 | 1.2 | 1.3 | V |  | 4 |
| External OTP delay time | TD_EXOTP | 42 | 49 | 56 | ms |  | 4 |
| Normal frequency of high output voltage | FOSC_NOM | 60 | 65 | 70 | kHz | VDD=15V, FB=3V, CS=0V | 5 |
| Frequency jittering | FOSC_JT | -7 |  | 7 | % |  | 5 |
| Output over voltage protection threshold voltage | VTH_OVP | 3.5 | 3.6 | 3.7 | V | MX1210E only | 5 |
| Output under-voltage protection threshold voltage | VTH_UVP | 0.3 | 0.35 | 0.4 | V |  | 5 |
| Output under voltage protection delay time | TD_UVP | 9 | 12 | 15 | ms |  | 5 |
| Brown in protection threshold current | IDMAG_BNI | 115 | 130 | 145 | μA |  | 5 |
| Brown out protection threshold current | IDMAG_BNO | 120 | 135 | 150 | μA |  | 5 |
| Brown out protection delay time | TD_BNO | 42 | 49 | 56 | ms | FOSC=83KHz | 5 |
| Pull-up PMOS active | V_Pull/up |  | 10 |  | V |  | 4 |
| Latch release voltage | V_Latch |  | 4.8 |  | V | External OTP/VDD_OVP/VO_OVP | 4 |
| Restart time for auto-recovery protection | T_recovery |  | 1.4 |  | s | Other protection | 4 |
| Internal OTP | OTP_in |  | 155 |  | ℃ |  | 5 |

## CAD (KiCad official)

- Symbol: `MX1210E`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `mx1210e-etched.step` / `mx1210e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mx1210e.step` / `mx1210e.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Wuxi Maxinmicro datasheet](docs/mx1210e-datasheet.pdf) (13 pp, sha256 `2b6d135bc2935bf4`, retrieved 2026-10-23, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/mx1210e-datasheet.pdf)