component

LT8609AIMSE#PBF

Public Unreviewed

by Ray

Analog Devices DC-DC Converters, MSOP-10-EP. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpower management (pmic)lt8609aimse#pbf
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

PCB Footprint

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Datasheet

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Download PDF
Contents

README

markdown

LT8609AIMSE#PBF

Analog Devices · DC-DC Converters · MSOP-10-EP

LT8609AIMSE#PBF from Analog Devices, in a MSOP-10-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 BST passive Bootstrap capacitor pin providing the drive voltage (above VIN) for the internal top-side power NMOS switch. Place a 0.1µF ceramic capacitor from BST to SW as close to the IC as possible; do not place a series resistor.
2 SW power_out Switch node - output of the internal top-side and synchronous bottom-side power MOSFETs. Connect to the external inductor and to the bootstrap capacitor. Keep this node small on the PCB for good EMI/thermal performance.
3 INTVCC power_out Internal 3.5V LDO regulator bypass pin that supplies the internal gate drivers and control circuits. Voltage varies from 2.8V to 3.5V; max output 20mA. Decouple to GND with at least a 1µF low-ESR ceramic capacitor. Do not load with external circuitry.
4 RT input Oscillator frequency-set pin. Tie a resistor from RT to GND to program the switching frequency between 200kHz (RT = 221kΩ) and 2.2MHz (RT = 16.2kΩ).
5 SYNC input External clock synchronization / mode-select input. Tie to GND for low-ripple Burst Mode; drive with an external clock (200kHz-2.2MHz) to synchronize; leave floating for pulse-skipping mode; tie to INTVCC or 3.2V-5.0V for pulse-skipping mode with spread-spectrum modulation.
6 FB input Feedback input for the adjustable-output LT8609A. Regulated to 0.782V. Connect to the tap of the external VOUT-to-GND resistor divider that programs the output voltage. Add a ~10pF phase-lead capacitor from VOUT to FB when using large divider resistors.
7 TR/SS input Output tracking and soft-start pin. An internal 2µA pull-up from INTVCC charges an external capacitor to program the output-voltage slew rate. Below 0.782V the part regulates FB to the TR/SS voltage; above 0.782V tracking is disabled. Pulled to GND through a 300Ω MOSFET in shutdown and fault conditions.
8 PG output Power-good open-drain output. Held low until FB is within ±8.5% of the regulation setpoint and no fault is present. Absolute max 42V; valid when VIN > 3.2V regardless of EN/UV state. Requires an external pull-up resistor.
9 VIN power_in Main input supply pin, 3.0V to 42V. Supplies internal control circuitry and the internal top-side power switch. Locally bypass with a low-ESR ceramic capacitor placed close to VIN and the exposed-pad GND.
10 EN/UV input Enable / input under-voltage lockout pin. Rising threshold 1.05V, falling 1.00V. Ground to shut the part down (IQ ≈ 1µA); tie to VIN if shutdown/UVLO is not used, or use an external VIN divider to program a precise VIN turn-on threshold. Absolute max 42V.
11 GND power_in Exposed thermal pad - signal and power ground return. Must be soldered directly to the PCB ground plane both for the electrical return path and to achieve the specified θJA = 40°C/W thermal resistance.

Key specifications

Parameter Value
Manufacturer Analog Devices
Package MSOP-10-EP
Category Power Management (PMIC)
Pins 11

Ordering variants

Same part, different packaging or reel option.

  • LT8609AIMSE#PBFEMSE
  • LT8609AIMSE#PBF
  • LT8609AIMSE#PBFHMSE
  • LT8609AIMSE#PBFJMSE
  • LT8609AIMSE#PBFEMSE16
  • LT8609AIMSE16
  • LT8609AIMSE#PBFHMSE16
  • LT8609AIMSE#PBFJMSE16
  • LT8609AIMSE#PBFEDDM
  • LT8609AIMSE#PBFJDDM
  • LT8609AIMSE#PBFHDDM
  • LT8609AIMSE#PBFEDDM-3.3
  • LT8609AIMSE#PBFJDDM-3.3
  • LT8609AIMSE#PBFEDDM-5
  • LT8609AIMSE#PBFJDDM-5
  • LT8609AIMSE#PBFHDDM-5

CAD (KiCad official)

  • Symbol: LT8609AIMSE#PBF
  • Footprint: Package_SO:MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm
  • 3D model: MSOP-10-EP (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Analog Devices datasheet (30 pp, sha256 bb514bf594e97238, 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).

Datasheet PDF