LTC4414IMS8#PBF - 36V Low Loss PowerPath Controller | Analog Devices
Teilenummer: LTC4414IMS8PBF ✓ AktivLTC4414IMS8PBF Übersicht
A PowerPath controller, also called an ORing controller or ideal-diode controller, is a power management IC that governs an external pass MOSFET so the switch behaves like a diode with near-zero forward voltage. In the power-management hierarchy, it sits between raw power sources (adapters, batteries, backup supplies) and the point-of-load regulator, replacing Schottky ORing diodes that would otherwise waste watts and generate heat.
Key differentiating features include the wide 36V input rating suited to 24V industrial rails, the use of large external P-channel FETs so current handling is limited only by the MOSFET chosen, and the roughly 20mV on-state drop across the FET, which slashes conduction loss versus a 0.3V-0.5V Schottky diode. This permits highly efficient ORing of multiple power sources for extended battery life and low self-heating.
Technically, the LTC4414 monitors the voltage across the external MOSFET's sense terminals and servos the gate to steer load current to the lower-loss source, blocking reverse current when a source fails or falls below the backup. The LTC4414E grade is guaranteed from 0C to 85C; the LTC4414I grade in this part number is guaranteed and tested over -40C to 125C, fitting industrial environments.
Typical applications include diode-ORing of a 24V adapter with a backup battery, server and telecom board-level supply redundancy, and battery-backup switchover in industrial instrumentation where dropout during source transition is unacceptable.
A key design consideration is selecting the external P-channel MOSFET: its on-resistance sets the total drop (20mV is typical at rated current), and its gate rating must tolerate the 36V maximum input range; verify gate-source stress at full Vin.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in-Alternativen für LTC4414IMS8PBF – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
LTC4412IMS8#PBF
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
LTC4412CMS8#PBF
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
LTC4412HS8#TRPBF
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
LTC4414IMS8PBF Grenzwerte & elektrische Eigenschaften
| Funktion | OR Controller / Ideal Diode (PowerPath) Controller |
| Topologie | Controls external P-channel MOSFET |
| Input Voltage Rating | 36 V |
| Forward Voltage Drop (conducting) | 20 mV typical across MOSFET |
| Source Selector | 2:1 P-channel |
| Operating Temperature Range (I grade) | -40C to 125C |
| Operating Temperature Range (E grade) | 0C to 85C |
| Gehäuse | 8-MSOP (MS8) |
| Montageart | Surface Mount |
| Reverse Current Blocking | Yes |
| RoHS-Status | Compliant (#PBF suffix) |
| Lead Free | Yes (#PBF suffix) |
LTC4414IMS8PBF 8-msop (ms8) Pinbelegungsleitfaden
Pinbelegung für LTC4414IMS8PBF (8-msop (ms8)-Gehäuse). Dieses Leistungsbauteil verfügt über Gate-, Drain- und Source-Anschlüsse. Bei nicht gepolten Gehäusen entnehmen Sie die genaue Ausrichtung von Pin 1 und Footprint-Details dem Herstellerdatenblatt. Typische Anwendungen sind Netzteilentwurf, Motoransteuerung und Lastschaltung.
Keine detaillierten Pinbelegungsdaten verfügbar für LTC4414IMS8PBF.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
LTC4414IMS8PBF ist geeignet für 6 Anwendungs: Diode-ORing of Adapter and Backup Battery, Server and Telecom Board Supply Redundancy, Industrial Instrumentation Battery Backup, 24V PLC and Factory Automation Power Entry, Solar and Renewable Energy Source ORing, High-Current Supply Holdup and Hot Swap Handover.
Diode-ORing of Adapter and Backup Battery
The LTC4414's core application is ORing a primary adapter with a backup battery in industrial and telecom equipment. Because the part is rated to 36V, it accommodates 24V adapters with headroom, and its controller architecture delivers a typical 20mV drop across the conducting external P-channel MOSFET, versus 0.3V-0.5V for a Schottky ORing diode. Placed between the two sources and the load, the controller servos the PFET gate so the lower-voltage source is reverse-blocked, then hands over seamlessly on primary failure. The efficiency gain scales with load current: at 5A, replacing a single Schottky saves roughly 2W of continuous dissipation, extending battery runtime and cutting board hot spots. Select the PFET on-resistance to bound total drop and verify gate-source stress at maximum Vin.
Empfohlen
Server and Telecom Board Supply Redundancy
Redundant -48V-rectified or intermediate-bus boards need seamless source handover. The LTC4414's 36V rating and large-PFET drive suit redundant feeds on 24V-class intermediate buses, where a conventional diode-OR would burn several watts per feed. Using the external P-channel MOSFET as a near-ideal diode with a typical 20mV drop, both feeds share current with minimal imbalance and minimal self-heating, keeping inlet airflow budgets intact. The controller blocks reverse current when one feed sags, preventing fault backfeed between rectifiers. Designers should place the sense connections directly across the MOSFET drain and source, use low-ESR decoupling at both source nodes, and derate the PFET for worst-case hot-aisle ambient temperatures common in telecom racks.
Empfohlen
Industrial Instrumentation Battery Backup
Industrial meters, data loggers, and process transmitters must ride through mains outages without corrupting measurements. The LTC4414 I-grade is guaranteed and tested from -40C to 125C per the datasheet, matching unconditioned cabinets and outdoor enclosures. Its low 20mV typical forward drop means the battery is not needlessly discharged through a diode while the adapter is present, and switchover to the battery occurs without an interruption the microcontroller would detect. Because the controller drives a large external PFET, backup current capability is chosen freely - from tens of milliamps to multiple amps - by FET selection. Add a supervisory IC on the microcontroller rail to guarantee orderly reset margins during extended battery sag at the lower end of the discharge curve.
Empfohlen
24V PLC and Factory Automation Power Entry
Programmable-logic-controller I/O racks run from 24V DIN-rail supplies that occasionally coexist with local backup sources. The LTC4414's 36V maximum input directly covers the 24V nominal rail plus tolerance and transients, while its controller topology keeps the ORing loss near 20mV at rated load, reducing cabinet heat versus legacy diode-OR boards. Its -40C to 125C I-grade operation tolerates cold factory floors and hot drive cabinets alike. In a typical entry stage, the controller drives a PFET per source ahead of the rack's DC-DC modules; the near-ideal diode behavior prevents a failed supply from dragging down the shared bus. Verify the PFET's gate protection at maximum supply tolerance and consider input TVS clamping upstream.
Empfohlen
Solar and Renewable Energy Source ORing
Off-grid systems frequently combine a solar-panel-fed charge node with a battery or backup adapter, and the ORing element must tolerate open-circuit panel voltages that can approach 36V in 24V-class systems. The LTC4414's input rating and its large external PFET drive let designers scale ORing current from a few amps to tens of amps, while the typical 20mV conduction drop recovers energy that a Schottky diode would waste around the clock. Reverse-current blocking prevents the battery from feeding a dark panel at night. Place the controller close to the battery node, size the PFET for the panel short-circuit current with margin, and confirm gate-drive behavior across the full panel voltage swing in cold-temperature conditions, where open-circuit voltage rises.
Empfohlen
High-Current Supply Holdup and Hot Swap Handover
Computing and storage blades need millisecond-class ride-through when one feed is removed for service. Because the LTC4414 controls an external P-channel MOSFET, holdup and handover current is a free design variable: choose a low-Rds(on) large PFET and the total drop stays near the datasheet's typical 20mV at full load, minimizing holdup-capacitor sizing and board heating during continuous parallel operation. The near-ideal diode action means both sources can share load continuously rather than one dominating, avoiding thermal cycling of a dedicated standby path. Layout guidance: keep the MOSFET sense traces Kelvin-connected across the FET, provide a solid ground for the controller, and validate switchover under maximum load with an oscilloscope capture of the load rail dip.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für LTC4414IMS8PBF – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | LTC4412IMS8#PBF | LTC4412CMS8#PBF | LTC4412HS8#TRPBF |
|---|---|---|---|---|
| Package | 8-MSOP (MS8) | 8-MSOP (MS8) - same | 8-MSOP (MS8) - same | 8-MSOP (MS8) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Architecture | External P-channel MOSFET PowerPath controller | External P-channel MOSFET PowerPath controller | External P-channel MOSFET PowerPath controller | External P-channel MOSFET PowerPath controller |
| Lifecycle Status | Recommended for new designs (active) | Active family member | Active family member | Active family member |
Wichtigste Unterscheidungsmerkmale
- 36V input rating for 24V industrial rails (vs. LTC4412IMS8#PBF)
- Optimized for large external PFETs (vs. LTC4412CMS8#PBF)
- Trade-off: automotive grade absent (vs. LTC4412HS8#TRPBF)
Designhinweise
Select the external P-channel MOSFET before anything else: its Rds(on) sets the actual forward drop (the datasheet's 20mV is a typical figure at a given current and FET), and its Vgs rating must survive the full 36V input range. Estimated: at 5A with a 4mOhm PFET, conduction drop is about 20mV and dissipation about 0.1W - versus roughly 2.5W for a 0.5V Schottky diode at the same current. Confirm the controller keeps the FET fully enhanced at minimum Vin.
Route the MOSFET sense connections as Kelvin traces directly to the drain and source terminals, not through the power copper, so the controller senses the true FET voltage and regulates the handover threshold accurately. Place a 0.1uF ceramic decoupling capacitor immediately at the controller supply pin and keep the gate-drive trace short to limit ringing when the PFET switches between sources. Refer to the typical application circuit in the Analog Devices LTC4414 datasheet for the reference topology.
Do not assume family interchangeability: the LTC4414 and LTC4412 share a package and concept but are not guaranteed pin-to-pin compatible - verify the pin configuration in each datasheet before substituting. Also respect the temperature grade: the E grade is specified only from 0C to 85C, and using it in a -40C application voids the guaranteed spec, whereas the I grade in this part number is tested to -40C to 125C per the datasheet.
Compliance-Informationen
The #PBF suffix denotes Analog Devices' lead-free (Pb-free) RoHS-compliant packaging per manufacturer part-number convention.
