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MAX20051AUD
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Analog Devices Inc Maxim Integrated LED Drivers, TSSOP-14-EP. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
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PCB Footprint
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Datasheet
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README
markdownMAX20051AUD
Analog Devices Inc Maxim Integrated · LED Drivers · TSSOP-14-EP
MAX20051AUD from Analog Devices Inc Maxim Integrated, in a TSSOP-14-EP. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | PGND | power_in | Power ground for the integrated low-side MOSFET / buck converter power stage. Return path for the switching current; bypass IN to PGND with at least 1μF ceramic capacitor. |
| 2 | IN | power_in | Power-supply input, 4.5V to 65V. Feeds the internal buck power stage and the 5V VCC LDO. Bypass to PGND with a minimum of 1μF ceramic capacitor. Pins 2 and 3 are tied together internally. |
| 3 | IN | power_in | Power-supply input, 4.5V to 65V (second bond of the IN net for current handling). Tie externally to pin 2 and bypass to PGND with a minimum of 1μF ceramic capacitor. |
| 4 | CS+ | input | Positive input of the high-side average current-mode control amplifier. Connect to the junction of the output inductor and the top of the current-sense resistor. Common-mode range −0.2V to +65V; 200mV full-scale differential sense. |
| 5 | CS- | input | Negative input of the high-side average current-mode control amplifier. Connect to the anode of the LED string and to the other end of the current-sense resistor. Sets LED current together with CS+. |
| 6 | PWM | input | Logic-level PWM dimming input. Drive low to disable the current regulator, float or drive high for 100% duty. Absolute max −0.3V to +6V. If held low for >210ms the device turns off; also used to synchronize switching frequency. |
| 7 | FLT | output | Active-low, open-drain fault output. Pulled low to flag output overload, short-circuit, or overtemperature conditions (see Fault Pin Behavior). Requires external pull-up; absolute max −0.3V to +6V. |
| 8 | COMP | output | External loop compensation node (present on MAX20051/MAX20053 only). Connect an RC network from COMP to AGND to set the transconductance error-amplifier loop compensation. Voltage rating −0.3V to VCC+0.3V. |
| 9 | AGND | power_in | Analog ground reference for control circuitry, LDO, REFI, and COMP. Star-tie to PGND at the power-stage return. The exposed pad (EP) must be connected to AGND. |
| 10 | REFI | input | Analog dimming control input, 0 to 1.2V. Sets the full-scale LED current reference (200mV/CS_gain=5V/V typ). Below ~180mV the regulator zero-current threshold is reached and the output is disabled. Internally clamped to ~1.3V. |
| 11 | VCC | power_out | 5V internal LDO regulator output (10mA capable). Bias supply for the gate drivers and internal analog. Bypass to AGND with a 1μF ceramic capacitor. Do not load externally beyond spec. |
| 12 | BST | passive | Bootstrap capacitor node for the high-side MOSFET gate driver. Connect a 0.1μF ceramic capacitor from BST to LX. Absolute max BST-to-LX is 6V; BST-to-AGND is 75V (45V for C/D variants). |
| 13 | LX | power_out | Switching node - drain of internal high-side MOSFET and source of internal low-side MOSFET. Connect to one end of the output inductor. Pins 13 and 14 are internally tied and both must be connected together on the PCB. |
| 14 | LX | power_out | Switching node (second bond of the LX net for current handling, up to 2.1A). Tie externally to pin 13 and to the output inductor. |
| EP | EP | power_in | Exposed thermal pad on the bottom of the TSSOP-14-EP package. Connect to a large-area ground plane for effective power dissipation and tie to AGND. Do not use as the only ground connection. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc Maxim Integrated |
| Package | TSSOP-14-EP |
| Category | LED Drivers |
| Pins | 15 |
Ordering variants
Same part, different packaging or reel option.
MAX20051AUDMAX20051AUDAAUDMAX20051AUDEAUDMAX20051AUDBAUDMAX20051AUDCAUD
CAD (KiCad official)
- Symbol:
MAX20051AUD - Footprint:
Package_SO:TSSOP-14-1EP_4.4x5mm_P0.65mm - 3D model: TSSOP-14-EP (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices Inc Maxim Integrated datasheet (None pp, sha256
bc10df94e5116eff, retrieved 2026-08-17, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).