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LT3686IDD#PBF

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Analog Devices DC-DC Converters, DFN-10-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LT3686IDD#PBF

Analog Devices · DC-DC Converters · DFN-10-EP(3x3)

LT3686IDD#PBF from Analog Devices, in a DFN-10-EP(3x3). 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 VIN power_in The VIN pin supplies current to the internal regulator and internal power switch and must be locally bypassed; the input range is 3.6V to 37V.
2 BD passive The BD pin supplies current to the internal Boost Schottky diode, should be tied to the output whenever possible, and regulates an active load when MODE is above 0.8V.
3 FB input The feedback pin regulates to 0.8V, with the output set by VOUT = 0.8(1 + R1/R2) and a recommended R2 of 10k.
4 SS input The soft-start and tracking pin is charged by an internal 2µA source tied to a 2.5V reference, and feedback stops tracking at 0.8V; the pin should float if soft-start is not used.
5 RT input The RT pin programs the oscillator frequency through a resistor selected from Table 1 in the applications section.
6 EN/UVLO input The EN/UVLO pin starts up the device, shuts it down when pulled below 0.4V, provides a 1.27V UVLO threshold, and must not be driven above VIN.
7 MODE input The MODE pin selects the BD active load, which is enabled when MODE is above 0.8V and disabled when tied to GND.
8 BOOST input The BOOST pin provides a drive voltage higher than the input voltage to the internal NPN power switch.
9 DA passive The DA pin is the connection for the catch diode (D1) anode.
10 SW output The SW pin is the output of the internal power switch and connects to the inductor, catch diode and boost capacitor.
11 GND power_in The exposed pad GND pin is the only ground connection for the device and must be soldered to a large copper area to reduce thermal resistance.

Key specifications

Parameter Value
Manufacturer Analog Devices
Package DFN-10-EP(3x3)
Category Power Management ICs
Pins 11

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Quiescent Current at Shutdown IQ 0.1 1 µA VEN/UVLO < 0.4V 3
Quiescent Current at Shutdown IQ 10 15 µA VEN/UVLO = 1V 3
Quiescent Current Not Switching IQ 1.1 1.3 mA Not Switching, MODE ≤ 0.4V 3
Quiescent Current Not Switching IQ 1.2 1.4 mA Not Switching, MODE ≥ 0.8V 3
Internal Undervoltage Lockout 3.4 3.6 V 3
Overvoltage Lockout 37 38 39 V l (full operating temperature range) 3
Feedback Voltage VFB 0.79 0.8 0.81 V l (full operating temperature range) 3
Feedback Voltage VFB 0.785 0.8 0.815 V l (full operating temperature range) 3
FB Pin Bias Current IFB 20 100 nA 3
Minimum On Time 100 110 ns 3
Minimum Off Time 150 200 ns 3
Switch Current Limit 1.9 2.3 2.6 A Note 3 3
Switch Current Limit 1.85 2.3 2.65 A l (full operating temperature range), Note 3 3
Switch Active Current 400 600 µA SW = 10V (Note 4) 3
Switch Active Current 20 30 µA SW = 0V (Note 5) 3
Minimum Boost Voltage Above Switch 2.2 2.4 V ISW = 1.2A 3
Max BD Pin Active Load Current 30 40 mA MODE > 0.8V, BD < 5.2V 3
BD Pin Active Load Disable Threshold 5.2 6.5 V l (full operating temperature range) 3
DA Pin Current to Stop OSC 1.2 1.7 A l (full operating temperature range) 3
MODE High 0.8 V l (full operating temperature range) 3
MODE Low 0.4 V l (full operating temperature range) 3
SS Source Current ISS 1.3 2 2.7 µA VSS = 1V 3
EN/UVLO Threshold to Turn Off 1.22 1.27 1.32 V l (full operating temperature range) 3
EN/UVLO Hysteresis Current 1.8 2.4 3 µA 3
BOOST Pin Above SW Pin VBOOST-SW 25 V 2
FB Voltage VFB 6 V 2
BD Voltage VBD 25 V 2
RT Voltage VRT 6 V 2
SS Voltage VSS 2.5 V 2
MODE Voltage VMODE 6 V 2
Operating Junction Temperature Range TJ -40 125 °C LT3686I 2
Storage Temperature Range TSTG -65 150 °C 2
Thermal Resistance Junction to Ambient θJA 43 °C/W 2

CAD (KiCad official)

  • Symbol: LT3686IDD#PBF
  • Footprint: Package_DFN_QFN:DFN-10-1EP_3x3mm_P0.5mm_EP1.55x2.48mm
  • 3D model: DFN-10-EP(3x3) (KiCad packages3D, STEP)
  • 3D model files: lt3686idd-pbf-etched.step / lt3686idd-pbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lt3686idd-pbf.step / lt3686idd-pbf.glb are the bare package body.

Provenance

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

  • Datasheet: Analog Devices datasheet (28 pp, sha256 21c973cf91b5f4e3, retrieved 2026-10-28, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (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