component
LT8618EDDB#TRPBF
Public Made by Adomby adom
Analog Devices DC-DC Converters, DFN-10(2x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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LT8618EDDB#TRPBF
Analog Devices · DC-DC Converters · DFN-10(2x3)
LT8618EDDB#TRPBF from Analog Devices, in a DFN-10(2x3). 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 | BST | power_out | Supplies a drive voltage higher than VIN to the topside power switch; place a 47nF boost capacitor as close as possible to the IC and do not put resistance in series with this pin. |
| 2 | SW | power_out | Output of the internal power switches that connects to the inductor, and this node should be kept small on the PCB for good performance. |
| 3 | BIAS | input | The internal regulator draws current from BIAS instead of VIN when BIAS is above 3.2V; for outputs of 3.3V to 25V it should be tied to VOUT, a 1µF bypass is needed if another supply is used, and it should be tied to GND if no supply is available. |
| 4 | INTVCC | power_out | Internal 3.4V regulator bypass pin with a maximum output current of 2mA that must not be loaded externally, and it needs at least 1µF of low-ESR ceramic decoupling placed close to the IC. |
| 5 | RT | passive | A resistor between RT and ground sets the switching frequency. |
| 6 | FB | input | For the LT8618 this is the feedback input where the feedback resistor divider tap connects, and the part regulates FB to 0.778V. |
| 7 | TR/SS | bidirectional | Output tracking and soft-start pin where a voltage below 0.778V makes FB follow TR/SS, an internal 2µA pull-up sets the output ramp with a capacitor, and a 300Ω pull-down is active during shutdown and fault so a series resistor is needed if driven from a low-impedance output. |
| 8 | PG | output | Open-drain power-good output that stays low until FB is within ±7.5% of the regulation voltage with no fault conditions, and it is valid when VIN is above 3.4V regardless of EN/UV state. |
| 9 | EN/UV | input | The part is shut down when this pin is low and active when high, with a hysteretic threshold of 1.05V rising and 1.00V falling; tie it to VIN if shutdown is not used, and an external resistor divider from VIN can set a UVLO threshold. |
| 10 | VIN | power_in | Supplies the internal circuitry and top-side power switch and must be locally bypassed with the input capacitor's positive terminal as close as possible to VIN, rated 3.4V to 60V operating (65V maximum for transients). |
| 11 | GND | power_in | Exposed pad ground that must be connected to the negative terminal of the input capacitor and soldered to the PCB to lower the thermal resistance. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | DFN-10(2x3) |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Operating Input Voltage | 3.4 | 60 | V | 3 | |||
| Minimum Input Voltage | 2.9 | 3.4 | V | Note 5 | 3 | ||
| VIN Quiescent Current | 1 | 4 | µA | VEN/UV = 0V | 3 | ||
| VIN Quiescent Current | 1.7 | 12 | µA | VEN/UV = 2V, Not Switching | 3 | ||
| LT8618 Feedback Reference Voltage | VFB | 0.762 | 0.778 | 0.798 | V | VIN = 12V, ILOAD = 100µA | 3 |
| FB/OUT Voltage Line Regulation | -0.06 | 0.02 | 0.06 | %/V | VIN = 4V to 60V | 3 | |
| LT8618 FB Pin Input Current | IFB | -20 | 20 | nA | VFB = 0.8V | 3 | |
| Minimum On-Time | 35 | 65 | ns | 3 | |||
| Minimum Off-Time | 90 | 120 | ns | 3 | |||
| Oscillator Frequency | fSW | 140 | 200 | 260 | kHz | RT = 221k | 3 |
| Oscillator Frequency | fSW | 1.85 | 2 | 2.15 | MHz | RT = 18.2k, LT8618/LT8618-3.3/LT8618C | 3 |
| Top Power NMOS Current Limit | 150 | 200 | 250 | mA | 3 | ||
| SW Leakage Current | 15 | µA | VIN = 48V | 3 | |||
| EN/UV Pin Threshold | 0.98 | 1.05 | 1.11 | V | Pin Voltage Rising | 3 | |
| EN/UV Pin Current | -50 | 50 | nA | VEN/UV = 2V | 3 | ||
| PG Upper Threshold Offset from VFB/OUT | 5 | 7.5 | 10 | % | VFB/OUT Rising, LT8618/LT8618-3.3 | 4 | |
| PG Lower Threshold Offset from VFB/OUT | -10 | -7.5 | -5 | % | VFB/OUT Falling, LT8618/LT8618-3.3/LT8618C | 4 | |
| PG Leakage | -200 | 200 | nA | VPG = 42V | 4 | ||
| PG Pull-Down Resistance | 550 | 1200 | Ω | VPG = 0.1V | 4 | ||
| TR/SS Source Current | 1 | 2 | 3.5 | µA | VTR/SS = 0.1V, E- and I-Grades | 4 | |
| TR/SS Pull-Down Resistance | 300 | 900 | Ω | Fault Condition, VTR/SS = 0.1V | 4 | ||
| VIN Pin Voltage | VIN, VEN/UV | -0.3 | 65 | V | Note 4: 65V transients, 60V continuous operation | 2 | |
| PG Voltage | VPG | -0.3 | 42 | V | 2 | ||
| BIAS Voltage | VBIAS | -0.3 | 25 | V | 2 | ||
| FB and TR/SS Voltages | VFB, VTR/SS | -0.3 | 4 | V | FB (LT8618/LT8618C), TR/SS | 2 | |
| Operating Junction Temperature Range | TJ | -40 | 125 | °C | LT8618E/LT8618E-3.3 | 2 | |
| Storage Temperature Range | TSTG | -65 | 150 | °C | 2 | ||
| Thermal Resistance Junction-to-Ambient | θJA | 76 | °C/W | DDB 10-lead (3mm × 2mm) DFN | 2 | ||
| Thermal Resistance Junction-to-Case | θJC | 13.5 | °C/W | DDB 10-lead (3mm × 2mm) DFN | 2 |
CAD (KiCad official)
- Symbol:
LT8618EDDB#TRPBF - Footprint:
Package_DFN_QFN:DFN-10-1EP_2x3mm_P0.5mm_EP0.64x2.4mm - 3D model: DFN-10(2x3) (KiCad packages3D, STEP)
- 3D model files:
lt8618eddb-trpbf-etched.step/lt8618eddb-trpbf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lt8618eddb-trpbf.step/lt8618eddb-trpbf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (29 pp, sha256
4bd6ffbba1021846, retrieved 2026-10-28, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).