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LTC3440EMS#PBF

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Analog Devices DC-DC Converters, MSOP-10. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LTC3440EMS#PBF

Analog Devices · DC-DC Converters · MSOP-10

LTC3440EMS#PBF from Analog Devices, in a MSOP-10. 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 RT input Timing resistor pin that programs the oscillator frequency over a range of 300kHz to 2MHz.
2 MODE/SYNC input Driving it high enables Burst Mode operation, while a low level or an external clock selects fixed-frequency switching, with the clock at twice the desired switching frequency and a pulse width between 100ns and 2µs.
3 SW1 passive Switch pin where internal switches A and B connect; the inductor connects from SW1 to SW2 and the trace should be kept short to reduce EMI.
4 SW2 passive Switch pin where internal switches C and D connect; a Schottky diode from SW2 to VOUT is required for output voltages above 4.3V.
5 GND power_in Signal and power ground for the IC, to which the VIN bypass capacitor must be returned close to the pin.
6 VOUT power_out Output of the synchronous rectifier, with a filter capacitor from VOUT to GND; the output is adjustable from 2.5V to 5.5V.
7 VIN power_in Input supply pin and internal VCC for the IC, with an input operating range of 2.5V to 5.5V and a ceramic bypass capacitor required close to VIN and GND.
8 SHDN/SS input Combined soft-start and shutdown pin: grounding it shuts down the IC, above 1.5V enables the IC, and above 2.5V keeps the error amp from being clamped during soft-start.
9 FB input Feedback pin connected to the resistor divider tap, with a feedback reference typically 1.22V (1.196V to 1.244V).
10 VC passive Error amplifier output, with a frequency compensation network connected from this pin to FB.

Key specifications

Parameter Value
Manufacturer Analog Devices
Package MSOP-10
Category Power Management ICs
Pins 10

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Input Start-Up Voltage 2.4 2.5 V 2
Input Operating Range 2.5 5.5 V 2
Output Voltage Adjust Range 2.5 5.5 V 2
Feedback Voltage 1.196 1.22 1.244 V 2
Feedback Input Current VFB 1 50 nA VFB = 1.22V 2
Quiescent Current, Burst Mode Operation 25 40 µA VC = 0V, MODE/SYNC = 3V (Note 3) 2
Quiescent Current, Shutdown 0.1 1 µA SHDN = 0V, Not Including Switch Leakage 2
Quiescent Current, Active 600 1000 µA VC = 0V, MODE/SYNC = 0V (Note 3) 2
NMOS Switch Leakage 0.1 5 µA Switches B and C 2
PMOS Switch Leakage 0.1 10 µA Switches A and D 3
Maximum Duty Cycle Boost 55 75 % % Switch C On 3
Maximum Duty Cycle Buck 100 % % Switch A On 3
Minimum Duty Cycle 0 % 3
Frequency Accuracy 0.8 1 1.2 MHz 3
MODE/SYNC Threshold 0.4 2 V 3
MODE/SYNC Input Current VMODE/SYNC 0.01 1 µA VMODE/SYNC = 5.5V 3
SHDN/SS Threshold, When IC is Enabled 0.4 1 1.5 V When IC is Enabled 3
SHDN/SS Threshold, When EA is at Maximum Boost Duty Cycle 2.2 V When EA is at Maximum Boost Duty Cycle 3
SHDN/SS Input Current VSHDN 0.01 1 µA VSHDN = 5.5V 3
NMOS Switch On Resistance 0.19 Ω Switches B and C 3
PMOS Switch On Resistance 0.22 Ω Switches A and D 3
Input Current Limit 1 A 3
Error Amp AVOL 90 dB 3
Error Amp Source Current 15 µA 3
Error Amp Sink Current 380 µA 3
VIN, VOUT Voltage VIN, VOUT -0.3 6 V 2
SW1, SW2 Voltage SW1, SW2 -0.3 6 V 2
VC, RT, FB, SHDN/SS, MODE/SYNC Voltage VC, RT, FB, SHDN/SS, MODE/SYNC -0.3 6 V 2
Operating Temperature Range -40 85 °C 2
Storage Temperature Range -65 125 °C 2
Lead Temperature (Soldering) 300 °C Soldering, 10 sec 2
Maximum Junction Temperature TJMAX 125 °C 2
Thermal Resistance, Junction to Ambient (MS package) θJA 130 °C/W 1 layer board 2
Thermal Resistance, Junction to Ambient (MS package) θJA 100 °C/W 4 layer board 2
Thermal Resistance, Junction to Case (MS package) θJC 45 °C/W 2

CAD (KiCad official)

  • Symbol: LTC3440EMS#PBF
  • Footprint: Package_SO:MSOP-10_3x3mm_P0.5mm
  • 3D model: MSOP-10 (KiCad packages3D, STEP)
  • 3D model files: ltc3440ems-pbf-etched.step / ltc3440ems-pbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ltc3440ems-pbf.step / ltc3440ems-pbf.glb are the bare package body.

Provenance

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

  • Datasheet: Analog Devices datasheet (22 pp, sha256 284b323962287c76, 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