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LTC3440EMS#TRPBF

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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#TRPBF

Analog Devices · DC-DC Converters · MSOP-10

LTC3440EMS#TRPBF 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 passive Timing resistor pin that programs the oscillator frequency over a 300kHz to 2MHz range.
2 MODE/SYNC input Selects Burst Mode operation when driven high or fixed-frequency operation when driven low, and accepts an external clock at twice the switching frequency with a 100ns to 2µs pulse width for synchronization.
3 SW1 passive Switch node where internal switches A and B connect; the inductor is connected from SW1 to SW2, and an optional Schottky diode may be connected from SW1 to ground.
4 SW2 passive Switch node where internal switches C and D connect; for output voltages above 4.3V a Schottky diode is required from SW2 to VOUT.
5 GND power_in Signal and power ground for the IC.
6 VOUT power_out Output of the synchronous rectifier, with a filter capacitor from VOUT to GND; output is adjustable from 2.5V to 5.5V.
7 VIN power_in Input supply pin and internal VCC for the IC, operating from 2.5V to 5.5V and requiring a ceramic bypass capacitor placed close to VIN and GND.
8 SHDN/SS input Grounding this pin shuts down the IC, a level above 1.5V enables it, and a level above 2.5V keeps the error amp from being clamped during soft-start, with an RC here limiting the VC rise time.
9 FB input Feedback pin connected to the resistor divider tap, with a typical reference of 1.22V that sets an output adjustable from 2.5V to 5.5V.
10 VC output Error amplifier output, to which a frequency compensation network is connected from VC to FB to compensate the loop.

Key specifications

Parameter Value
Manufacturer Analog Devices
Package MSOP-10
Category Power Management (PMIC)
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 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
Input Start-Up Voltage 2.4 2.5 V 2
Feedback Input Current 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 % Boost (% Switch C On) 3
Frequency Accuracy 0.8 1 1.2 MHz 3
MODE/SYNC Threshold 0.4 2 V 3
MODE/SYNC Input Current 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 Input Current 0.01 1 µA VSHDN = 5.5V 3
Input Current Limit 1 A 3
Maximum Duty Cycle Buck 100 % Buck (% Switch A On) 3
Minimum Duty Cycle 0 % 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
Error Amp AVOL AVOL 90 dB 3
Error Amp Source Current 15 µA 3
Error Amp Sink Current 380 µA 3
SHDN/SS Threshold, When EA is at Maximum Boost Duty Cycle 2.2 V When EA is at Maximum Boost Duty Cycle 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 -0.3 6 V 2
Operating Temperature Range -40 85 °C Note 2 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#TRPBF
  • Footprint: Package_SO:MSOP-10_3x3mm_P0.5mm
  • 3D model: MSOP-10 (KiCad packages3D, STEP)
  • 3D model files: ltc3440ems-trpbf-etched.step / ltc3440ems-trpbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ltc3440ems-trpbf.step / ltc3440ems-trpbf.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 2026-10-18, tier: lcsc)
  • 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