LTC4416IMS#PBF - 36V Dual Ideal Diode Controller | Analog Devices
MPN: LTC4416IMS#PBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.88 | $48.80 |
| 100 | $4.32 | $432.00 |
| 500 | $3.91 | $1,955.00 |
| 1,000 | $3.58 | $3,580.00 |
LTC4416IMS#PBF Overview
An ideal diode controller is a power management IC that regulates the gate of an external MOSFET so the MOSFET behaves like a diode with a very low forward voltage drop, replacing lossy Schottky diodes in power ORing circuits. In the power management hierarchy - power management IC, power path controller, ideal diode controller - these devices sit between multiple power sources and a shared load, automatically steering current from the highest-priority or highest-voltage source while blocking reverse current.
Key features include a wide 36V maximum operating voltage suited to 12V, 24V, and Power-over-Ethernet-adjacent high-voltage rails, dual-channel 2:2 source selection for true two-source ORing, and near-zero forward drop operation that dramatically reduces power loss and self-heating compared with diode ORing. Because the forward drop of the external PFET can be milliohms-level, conduction losses fall by an order of magnitude in high-current paths.
Technically, the LTC4416 regulates each external P-channel MOSFET gate to maintain a small, controlled forward voltage, forward-biasing the FET when its source is powered and pulling the gate low to block reverse current when the input falls below the output. The LTC4416-1 variant differs only in its priority/switchover behavior, giving designers a choice of arbitration scheme without changing the PCB. Low quiescent operation preserves battery life in portable and backup-power systems.
Typical applications include diode-ORing of wall adapters with backup batteries, hot-standby power switchover in telecom and industrial equipment, high-voltage battery backup systems, and redundant supply feeds for PoE or 24V instrumentation rails.
When designing, choose external PFETs whose Vds rating and Rds(on) match the rail voltage and load current, and provide adequate gate-charge-driven transition control; the controller does not limit inrush by itself, so series resistance or a downstream hot-swap controller may be needed for large load capacitances.
This page synthesizes distributor pricing, verified drop-in alternatives, lifecycle status, and practical design notes not found in the manufacturer datasheet, giving engineers a single citable reference for sourcing and design decisions.
Drop-in alternatives for LTC4416IMS#PBF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LTC4416IMS#PBF (same form factor and footprint) — differing in Function, Package, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC4416IMS-1#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC4416EMS#PBF
✅ Drop-In✓ In Stock
$3.84 / Unit
View Datasheet →LTC4416HMS#PBF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LTC4416IMS#PBF Maximum Ratings & Electrical Characteristics
| Function | Dual ideal diode / PowerPath controller (OR controller, source selector) |
| Number of Channels | 2 (controls two sets of external P-channel MOSFETs) |
| Maximum Supply Voltage | 36 V |
| External Switch Type | P-channel MOSFET |
| Configuration | 2:2 source selector / near-ideal diode ORing |
| Operating Temperature Range | -40C to +125C (I grade, guaranteed and tested) |
| E Grade Temperature Range | 0C to +85C (LTC4416E) |
| Package | 10-lead MSOP (MS) |
| Mounting Type | Surface Mount |
| Manufacturer Part Status | Active (also available as LTC4416-1 variant) |
| RoHS Status | RoHS3 Compliant (#PBF suffix = lead-free) |
| REACH Status | REACH Unaffected |
| MSL Rating | MSL 1 (Unlimited) |
| Primary Applications | Power switchover, battery backup, diode ORing of multiple power sources |
| Key Benefit | Highly efficient ORing for extended battery life and low self heating |
LTC4416IMS#PBF 10-lead msop (ms) Pin Configuration Guide
Pin configuration for LTC4416IMS#PBF (10-lead msop (ms) package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for LTC4416IMS#PBF.
Refer to the datasheet for full pin configuration.
Typical Applications
LTC4416IMS#PBF is suitable for 6 applications: Wall Adapter + Battery Backup ORing, Telecom and Industrial Hot-Standby Power Switchover, High-Voltage Battery Backup Systems, Redundant Supply Feeds for Network Equipment, PoE-Adjacent and 24V Instrumentation Rails, Portable and Battery-Powered Instruments.
Wall Adapter + Battery Backup ORing
The LTC4416IMS#PBF controls two P-channel MOSFETs to OR a wall adapter with a backup battery, automatically steering load current from the active source while blocking reverse discharge into the idle source. Its 36V maximum rating covers 12V adapters and multi-cell battery stacks, and the near-ideal diode behavior (milliohm-level forward drop with a suitable low-Rds(on) PFET) cuts conduction loss by an order of magnitude versus Schottky ORing diodes, extending battery runtime and reducing self-heating in enclosed products. Place the controller between the sources and the load rail with per-input bypass capacitors; verify MOSFET Vds margin above the highest adapter open-circuit voltage.
Recommended
Telecom and Industrial Hot-Standby Power Switchover
In telecom and industrial equipment fed from redundant supplies, the LTC4416IMS#PBF implements glitch-free hot-standby switchover between a primary and secondary 24V or 36V rail. The dual-channel architecture blocks reverse current on both inputs, so a failed or shorted supply cannot drag down the live bus. The I-grade -40C to +125C rating supports uncooled outdoor cabinets and factory floors. Designers should select PFETs with adequate SOA for the switchover transient and add downstream hot-swap control when the load presents large bulk capacitance, since the LTC4416 regulates forward drop but does not itself limit inrush current.
Recommended
High-Voltage Battery Backup Systems
The 36V operating rating of the LTC4416IMS#PBF makes it directly applicable to high-voltage battery backup, where a 24V or 28V battery string must silently take over when a main supply fails. Using external large PFETs keeps the series resistance in the milliohm range, so the backup path dissipates far less heat than a diode-OR equivalent - important for low self-heating in sealed enclosures. The 10-MSOP package conserves PCB area in compact UPS and backup modules. Size the MOSFET gate drive transition time so switchover completes before the output bulk capacitance discharges below the load's minimum operating voltage.
Recommended
Redundant Supply Feeds for Network Equipment
Routers, switches, and baseband cards frequently OR two -48V-derived or 12V intermediate bus feeds for redundancy. The LTC4416IMS#PBF provides two independent ideal diode channels in one 10-MSOP, halving the controller footprint versus two single-channel parts, with a 36V ceiling covering 12V and 24V intermediate bus architectures. Near-ideal diode action prevents circulating current between paralleled supplies, keeping each brick within its current-share specification. Keep gate-drive traces short to limit switching transients, and place 0.1uF plus 10uF bypass capacitance at both supply inputs per the LTC4416 datasheet application circuits.
Recommended
PoE-Adjacent and 24V Instrumentation Rails
Mouser classifies the LTC4416 as a 36V dual PowerPath controller for large PFETs, a fit for PoE-adjacent and 24V instrumentation systems where a powered feed and a local auxiliary supply must be ORed. The controller's forward regulation holds the PFET drop small under load, protecting measurement accuracy on sensitive analog rails by minimizing voltage sag during source transitions. With I-grade temperature guarantee and RoHS3/MSL1 compliance, it suits both lab instruments and field-deployed data acquisition hardware. Confirm that transients on the powered feed, including PoE classification surges, remain below the 36V absolute maximum at the controller pins.
Recommended
Portable and Battery-Powered Instruments
For portable instruments switching between an internal battery and an external charge/adapter input, the LTC4416IMS#PBF extends battery life because the ORing loss is the IxR drop of a low-Rds(on) PFET rather than a fixed ~0.4V diode drop. The datasheet explicitly targets highly efficient ORing of multiple power sources for extended battery life and low self heating. The small 10-MSOP package fits dense handheld PCBs, and the I-grade range covers outdoor use. Add reverse-polarity protection ahead of the adapter channel if field connectors permit miswiring, since the controller blocks reverse current but not reversed input voltage.
Recommended
Recommended Products Summary
Engineering reference data for LTC4416IMS#PBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC4416IMS-1#PBF | LTC4416EMS#PBF | LTC4416HMS#PBF |
|---|---|---|---|---|
| Package | 10-MSOP | 10-MSOP - same | 10-MSOP - same | 10-MSOP - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Max Supply Voltage | 36 V | 36 V | 36 V | 36 V |
| Channels | 2 (dual PowerPath) | 2 | 2 | 2 |
| External MOSFET Type | P-channel | P-channel | P-channel | P-channel |
| Priority / Switchover Logic | Standard LTC4416 arbitration | LTC4416-1 alternate arbitration | Standard LTC4416 arbitration | Standard LTC4416 arbitration |
| RoHS Compliance | RoHS3 Compliant (#PBF) | RoHS3 Compliant (#PBF) | RoHS3 Compliant (#PBF) | RoHS3 Compliant (#PBF) |
Key Differentiators
- Dual-channel 2:2 source selection in one 10-MSOP (vs LTC4414)
- Pin-compatible arbitration variants (vs LTC4416IMS-1#PBF)
- Industrial I-grade temperature guarantee (vs LTC4416EMS#PBF)
Design Notes
The LTC4416 controls the gates of external P-channel MOSFETs; it is not a protection IC. It does not limit inrush current, so charging large downstream bulk capacitance at switchover can exceed the MOSFET's safe operating area. Select PFETs with Vds rating comfortably above the maximum rail voltage (e.g., 40V-60V devices for a 24V rail) and verify SOA for the transition transient. Add a downstream hot-swap controller if the load presents more than a few hundred microfarads.
Keep the gate-drive traces from each LTC4416 gate output to its PFET gate short and wide to minimize inductance and switching transients. Place bypass capacitance (0.1uF ceramic plus 10uF bulk) directly at each supply input pin per the LTC4416 datasheet application circuits. The 10-MSOP has an exposed pin pattern but no thermal pad in this suffix; the controller itself dissipates little power since losses occur in the external FETs, so normal SMD land patterns suffice.
The forward drop in an LTC4416 ideal diode path is I_load x Rds(on) of the external PFET. Estimated: with a 10 milliohm FET at 5 A load, the drop is 50 mV and conduction loss is 0.25 W - versus roughly 0.4 V x 5 A = 2 W for a Schottky diode OR, an 8x loss reduction. This is the datasheet's stated benefit of highly efficient ORing for extended battery life and low self heating; it is a design estimate, not a datasheet specification.
Compliance Information
RoHS3 Compliant, REACH Unaffected, MSL 1 (Unlimited) per PartGenie compliance data. #PBF suffix denotes lead-free package per Analog Devices convention.
