component
LM5122MH
Public Made by Adomby adom
Texas Instruments DC-DC Converters, HTSSOP-20-EP. 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
markdownLM5122MH
Texas Instruments · DC-DC Converters · HTSSOP-20-EP
LM5122MH from Texas Instruments, in a HTSSOP-20-EP. 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 | SYNCOUT | output | Clock output pin providing 180° phase-shifted clock for interleaved multi-phase operation. |
| 2 | OPT | input | Clock synchronization selection pin enabling/disabling SYNCOUT for master/slave configuration. |
| 3 | CSN | input | Inverting input of current sense amplifier, connect to negative terminal of current sense resistor. |
| 4 | CSP | input | Non-inverting input of current sense amplifier, connect to positive terminal of current sense resistor. |
| 5 | VIN | power_in | Supply voltage input for VCC regulator, operating range 4.5V to 65V with 3V minimum after startup. |
| 6 | UVLO | input | Undervoltage lockout programming pin providing shutdown below 0.4V and standby mode below 1.2V threshold. |
| 7 | SS | input | Soft-start programming pin controlled by internal 10-μA current source setting error amplifier ramp rate. |
| 8 | SYNCIN/RT | input | Oscillator frequency programming resistor connection or external synchronization pulse input up to 1MHz. |
| 9 | AGND | power_in | Analog ground connection providing return for internal voltage reference and analog circuits. |
| 10 | FB | input | Feedback inverting input of error amplifier with 1.2V regulation threshold for output voltage control. |
| 11 | COMP | output | Error amplifier output for connection to loop compensation network between COMP and FB pins. |
| 12 | SLOPE | input | Slope compensation programming pin controlled by single resistor between SLOPE and AGND. |
| 13 | MODE | input | Switching mode selection pin determining forced PWM mode above 1.2V or diode emulation mode below 1.2V. |
| 14 | RES | output | Restart timer pin for external capacitor configuring hiccup mode off-time and reload delay. |
| 15 | PGND | power_in | Power ground connection for low-side MOSFET driver, connect directly to low-side switch source. |
| 16 | LO | output | Low-side MOSFET gate drive output with robust 3A integrated driver through short, low-inductance path. |
| 17 | VCC | power_out | VCC bias supply pin providing regulated 6.9V to 8.3V from internal regulator, locally decouple to PGND. |
| 18 | SW | bidirectional | Switching node of boost regulator connected to bootstrap capacitor and both high-side and low-side switches. |
| 19 | HO | output | High-side MOSFET gate drive output with robust 3A integrated driver through short, low-inductance path. |
| 20 | BST | power_in | Bootstrap supply for high-side gate driver, connect to bootstrap diode cathode and capacitor. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-20-EP |
| Category | Power Management (PMIC) |
| Pins | 21 |
CAD (KiCad official)
- Symbol:
LM5122MH - Footprint:
Package_SO:TSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP2.15x3.35mm - 3D model: HTSSOP-20-EP (KiCad packages3D, STEP)
- 3D model files:
lm5122mh-etched.step/lm5122mh-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm5122mh.step/lm5122mh.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (57 pp, sha256
7bd611bdc5bece00, retrieved 2026-10-01, 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-4-5-20251001(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).