component
LM27402MHX
Public Made by Adomby adom
Texas Instruments DC-DC Converters, HTSSOP-16-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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LM27402MHX
Texas Instruments · DC-DC Converters · HTSSOP-16-EP
LM27402MHX from Texas Instruments, in a HTSSOP-16-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 | CS+ | input | Current sense positive input and noninverting input to the current-sense comparator. |
| 2 | CS- | input | Current sense negative input and inverting input to the current-sense comparator with 10-µA nominal offset current. |
| 3 | SS/TRACK | bidirectional | Soft-start or tracking input with +3-µA charging current for external capacitor; can be controlled by external voltage source; voltage must not exceed VDD. |
| 4 | FB | input | Feedback input and inverting input to the error amplifier for output voltage setting and control loop compensation. |
| 5 | COMP | output | Output of the internal error amplifier compared to internal ramp at PWM comparator to establish duty cycle command. |
| 6 | FADJ | input | Frequency adjust input; switching frequency programmable between 200 kHz and 1.2 MHz via external resistor to GND. |
| 7 | SYNC | input | Frequency synchronization input for external clock; frequency must exceed FADJ setting; must not exceed VDD and tie to GND if unused. |
| 8 | EN | input | Enable input; apply voltage above 1.17 V typically to enable switching when VIN and VDD exceed UVLO thresholds; 100 mV hysteresis; 2-µA pullup to VDD; must not exceed VDD. |
| 9 | PGOOD | tri_state | Open-drain power good monitor output goes low during overcurrent, short-circuit, UVLO, output overvoltage/undervoltage, overtemperature, or unregulated output; includes 20-μs deglitch filter; voltage should not exceed 5.5 V. |
| 10 | VIN | power_in | Input voltage supply rail with operating range 3 V to 20 V; provides feedforward modulation and internal bias supply generation; requires 1-μF ceramic capacitor to GND. |
| 11 | GND | power_in | Common ground connection providing power and signal return for analog functions, low-side MOSFET gate, soft-start capacitor, and frequency adjust resistor. |
| 12 | VDD | power_out | Internal sub-regulated 4.5-V bias supply for high-side MOSFET switching via CBOOT; 1-µF ceramic capacitor required to GND; cannot connect to separate rail; can connect to VIN only if VIN ≤ 5.5 V. |
| 13 | LG | output | Low-side MOSFET gate drive output. |
| 14 | SW | power_out | Power stage switch-node connection and return path for the high-side gate driver; switching node between high-side MOSFET and inductor. |
| 15 | HG | output | High-side MOSFET gate drive output. |
| 16 | CBOOT | power_out | High-side gate driver supply rail; requires 100-nF ceramic capacitor to SW and Schottky diode from VDD; provides gate drive voltage for high-side MOSFET. |
| 17 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-16-EP |
| Category | Power Management (PMIC) |
| Pins | 17 |
CAD (KiCad official)
- Symbol:
LM27402MHX - Footprint:
Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mm - 3D model: HTSSOP-16-EP (KiCad packages3D, STEP)
- 3D model files:
lm27402mhx-etched.step/lm27402mhx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm27402mhx.step/lm27402mhx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (54 pp, sha256
603650c2a0683cad, retrieved 2026-10-07, 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).
# LM27402MHX
**Texas Instruments** · DC-DC Converters · HTSSOP-16-EP
LM27402MHX from Texas Instruments, in a HTSSOP-16-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 | CS+ | input | Current sense positive input and noninverting input to the current-sense comparator. |
| 2 | CS- | input | Current sense negative input and inverting input to the current-sense comparator with 10-µA nominal offset current. |
| 3 | SS/TRACK | bidirectional | Soft-start or tracking input with +3-µA charging current for external capacitor; can be controlled by external voltage source; voltage must not exceed VDD. |
| 4 | FB | input | Feedback input and inverting input to the error amplifier for output voltage setting and control loop compensation. |
| 5 | COMP | output | Output of the internal error amplifier compared to internal ramp at PWM comparator to establish duty cycle command. |
| 6 | FADJ | input | Frequency adjust input; switching frequency programmable between 200 kHz and 1.2 MHz via external resistor to GND. |
| 7 | SYNC | input | Frequency synchronization input for external clock; frequency must exceed FADJ setting; must not exceed VDD and tie to GND if unused. |
| 8 | EN | input | Enable input; apply voltage above 1.17 V typically to enable switching when VIN and VDD exceed UVLO thresholds; 100 mV hysteresis; 2-µA pullup to VDD; must not exceed VDD. |
| 9 | PGOOD | tri_state | Open-drain power good monitor output goes low during overcurrent, short-circuit, UVLO, output overvoltage/undervoltage, overtemperature, or unregulated output; includes 20-μs deglitch filter; voltage should not exceed 5.5 V. |
| 10 | VIN | power_in | Input voltage supply rail with operating range 3 V to 20 V; provides feedforward modulation and internal bias supply generation; requires 1-μF ceramic capacitor to GND. |
| 11 | GND | power_in | Common ground connection providing power and signal return for analog functions, low-side MOSFET gate, soft-start capacitor, and frequency adjust resistor. |
| 12 | VDD | power_out | Internal sub-regulated 4.5-V bias supply for high-side MOSFET switching via CBOOT; 1-µF ceramic capacitor required to GND; cannot connect to separate rail; can connect to VIN only if VIN ≤ 5.5 V. |
| 13 | LG | output | Low-side MOSFET gate drive output. |
| 14 | SW | power_out | Power stage switch-node connection and return path for the high-side gate driver; switching node between high-side MOSFET and inductor. |
| 15 | HG | output | High-side MOSFET gate drive output. |
| 16 | CBOOT | power_out | High-side gate driver supply rail; requires 100-nF ceramic capacitor to SW and Schottky diode from VDD; provides gate drive voltage for high-side MOSFET. |
| 17 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-16-EP |
| Category | Power Management (PMIC) |
| Pins | 17 |
## CAD (KiCad official)
- Symbol: `LM27402MHX`
- Footprint: `Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mm`
- 3D model: HTSSOP-16-EP (KiCad packages3D, STEP)
- 3D model files: `lm27402mhx-etched.step` / `lm27402mhx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm27402mhx.step` / `lm27402mhx.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm27402) (54 pp, sha256 `603650c2a0683cad`, retrieved 2026-10-07, 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`, primary `claude-haiku-4-5-20251001` (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/lm27402mhx-datasheet.pdf)