component

LT3439EFE#PBF

Public Made by Adom

by adom

Analog Devices DC-DC Converters, TSSOP-16-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management icslt3439efe#pbffactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
lt3439efe-pbf / README.md
History Download
Ray Publish 0.1.0 c00c08b 10d ago

LT3439EFE#PBF

Analog Devices · DC-DC Converters · TSSOP-16-EP

LT3439EFE#PBF from Analog Devices, in a TSSOP-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 PGND power_in Power ground connected to the emitter of the power switches through an internal sense resistor; it carries large currents and should be tied to a good quality ground plane.
2 NC unconnected No connection; the datasheet pinout lists this pin as NC.
3 COL A output Open-collector output of power switch A, connected to an outer terminal of the center-tapped transformer; keep traces short because of large currents, and COL A voltage is limited to 35V.
4 RSL passive Slew control resistor that sets the maximum current and voltage slew rate of collectors A and B, with a minimum of 3.4k for fast slewing and a maximum of 34k for slow slewing.
5 SYNC input Synchronizes the oscillator to an external clock with RT and CT set about 10% below the external clock frequency; tie to GND if unused, and SYNC voltage is limited to 20V.
6 CT passive Oscillator capacitor pin that works with RT to set the oscillator frequency; for RT = 16.9k, CT(nF) = 70/fOSC(kHz).
7 RT passive Oscillator resistor pin that sets the oscillator capacitor charge and discharge currents; nominal value is 16.9k, adjustable within ±25% of nominal.
8 NC unconnected No connection; the datasheet pinout lists this pin as NC.
9 NC unconnected No connection; the datasheet pinout lists this pin as NC.
10 GND power_in Signal ground for the oscillator, slew control circuitry and internal regulator; keep the connection free of large currents and tie it to the ground plane.
11 SHDN input Shutdown pin where grounding disables the part and the turn-on threshold is about 1.3V; SHDN voltage is limited to 20V, and the pin may be left floating or tied to VIN if unused.
12 NC unconnected No connection; the datasheet pinout lists this pin as NC.
13 VIN power_in Supply pin with an operating range of 2.8V to 17.5V and a 20V absolute maximum, to be bypassed with a 4.7µF or greater low ESR capacitor.
14 COL B output Open-collector output of power switch B, connected to an outer terminal of the center-tapped transformer; keep traces short because of large currents, and COL B voltage is limited to 35V.
15 NC unconnected No connection; the datasheet pinout lists this pin as NC.
16 PGND power_in Power ground connected to the emitter of the power switches through an internal sense resistor; it carries large currents and should be tied to a good quality ground plane.
17 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Analog Devices
Package TSSOP-16-EP
Category Power Management ICs
Pins 17

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
VIN Operating Range VIN 2.8 17.5 V 2
Minimum Input Voltage VIN(MIN) 2.55 2.7 V 2
Supply Current IVIN 12 mA 2.8V ≤ VIN ≤ 17.5V 2
Supply Current in Shutdown Mode IVIN(SHDN) 5 20 µA 2.8V ≤ VIN ≤ 17.5V, VSHDN = 0V 2
Shutdown Turn-On Threshold VSHDN(ON) 1.3 1.4 V 2.8V ≤ VIN ≤ 17.5V 2
Shutdown Turn-Off Threshold VSHDN(OFF) 1.2 1.26 V 2.8V ≤ VIN ≤ 17.5V 2
Shutdown Pin Current Hysteresis ISHDN 10 20 40 µA 2.8V ≤ VIN ≤ 17.5V, VSHDN = 1.4V 2
Oscillator Frequency fMAX 250 kHz 2
Synchronization Frequency Range fSYNC 300 kHz 2
SYNC Pin Threshold VSYNC 1.4 2.25 V 2
SYNC Pin Input Resistance RSYNC 40 kΩ 2
DC Switch Duty Cycle 50 % 2
Output Switch Breakdown Voltage BV 35 50 V 2.8V ≤ VIN ≤ 17.5V 2
Output Switch On Resistance RON 0.5 0.95 Ω ICOLA or ICOLB = 0.75A 2
Switch Current Limit ILIM(MAX) 1.2 1.4 1.65 A 2
Output Voltage Slew Rising Edge VSLEWR 17 V/µs Collector A or B 2
Output Voltage Slew Falling Edge VSLEWF 17 V/µs Collector A or B 2
Output Current Slew Rising Edge ISLEWR 5 A/µs Collector A or B 2
Output Current Slew Falling Edge ISLEWF 5 A/µs Collector A or B 2
VIN Voltage VIN 20 V 2
COL A, COL B Voltage 35 V 2
SHDN, SYNC Voltage 20 V 2
Maximum Junction Temperature 150 °C 2
Operating Junction Temperature Range -40 125 °C 2
Storage Temperature Range -65 150 °C 2
Lead Temperature (Soldering, 10 sec) 300 °C Soldering, 10 sec 2
Junction-to-Ambient Thermal Resistance θJA 40 °C/W TJMAX = 125°C 2

CAD (KiCad official)

  • Symbol: LT3439EFE#PBF
  • Footprint: Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16-EP (KiCad packages3D, STEP)
  • 3D model files: lt3439efe-pbf-etched.step / lt3439efe-pbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lt3439efe-pbf.step / lt3439efe-pbf.glb are the bare package body.

Provenance

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

  • Datasheet: Analog Devices datasheet (13 pp, sha256 ff87a40419427e18, retrieved 2026-10-29, 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