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LTC1261LIMS8#TRPBF
Public Unreviewedby Ray
Analog Devices DC-DC Converters, MSOP-8. Datasheet-verified pinout, 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
markdownLTC1261LIMS8#TRPBF
Analog Devices · DC-DC Converters · MSOP-8
LTC1261LIMS8#TRPBF from Analog Devices, in a MSOP-8. 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 | VCC | power_in | Positive power supply input, 2.7V to 5.25V. Must be bypassed to ground with at least a 1µF capacitor placed close to the pin. |
| 2 | C1+ | passive | Flying capacitor positive terminal. Connect a 0.1µF ceramic capacitor between C1+ and C1- to form the charge-pump flying capacitor. |
| 3 | C1- | passive | Flying capacitor negative terminal. Connect a 0.1µF ceramic capacitor from C1+ to C1- to form the charge-pump flying capacitor. |
| 4 | GND | power_in | Device ground. Connect to a low-impedance ground; a ground plane helps minimize output regulation errors. |
| 5 | ADJ/COMP | input | Output adjust / feedback pin on adjustable parts (LTC1261L) - an external resistor divider from OUT to GND sets the regulated negative output voltage using the internal 1.23V reference (typical divider current ≥10µA). On fixed-voltage parts (LTC1261L-4, LTC1261L-4.5) the divider is internal and this pin acts as COMP; a ~100pF capacitor to ground provides loop compensation to reduce output ripple. |
| 6 | OUT | power_out | Regulated negative voltage output (down to -5V, up to 20mA). Bypass to ground with a 1µF or larger capacitor; capacitor value and ESR strongly affect output ripple. |
| 7 | REG | output | Open-drain power-valid / regulation-good status output. Pulls low when the output magnitude is within 5% of the set value; requires an external pull-up (REG will not drive high on its own). Sinks 5mA at VCC = 5V (4mA at VCC = 3.3V); pull-up may exceed VCC up to 6V above ground. |
| 8 | SHDN | input | Active-high shutdown input. When low (or floating - internal 5µA pull-down keeps it low), the LTC1261L operates normally; when pulled high the charge pump is disabled, OUT collapses to 0V, and quiescent current drops to ~5µA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | MSOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
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CAD (KiCad official)
- Symbol:
LTC1261LIMS8#TRPBF - Footprint:
Package_SO:MSOP-8_3x3mm_P0.65mm - 3D model: MSOP-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (14 pp, sha256
336624392408a8a5, 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).