LTC1479CG#PBF - Dual Battery PowerPath Controller 36-SSOP | Analog Devices
部品番号: LTC1479CG#PBF ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $24.96 | $24.96 |
| 10 | $23.5 | $235.00 |
| 25 | $22.1 | $552.50 |
| 100 | $20.4 | $2,040.00 |
| 250 | $18.9 | $4,725.00 |
LTC1479CG#PBF 概要
A PowerPath controller is a specialized power management IC (PMIC) that sits between multiple power sources and a system load, orchestrating which source feeds the system rail while managing inrush current and seamless source transitions. In the power-management hierarchy, it belongs to the battery management IC family - sitting above simple power multiplexers because it adds adaptive current limiting, MOSFET gate control, and source-priority arbitration rather than merely switching rails.
Key features of the LTC1479 include low-loss N-channel MOSFET switch control for minimal series voltage drop, an adaptive current-limiting scheme that reduces capacitor and battery inrush current by controlling MOSFET gates during transitions, and direct interfacing to the LT1510, LT1511, and LT1620/LTC1435 battery charging circuits. This allows the LTC1479 to act as the coordinating hub of a complete charging-and-powering subsystem rather than an isolated switch.
Architecturally, the LTC1479 arbitrates among three power sources - two battery packs and a DC input such as an AC adapter - and steers the highest-priority valid source to the system regulator input. Transitions between sources are managed by controlling external MOSFET gates with soft current limiting, which prevents large transient currents from discharging bypass capacitors into the battery or collapsing the system rail during handoff.
Typical applications include single and dual battery notebook computers, portable instruments, battery-powered test equipment, and industrial portable devices where a DC input must take priority over battery power. Its multi-chemistry support makes it suitable for designs that may migrate between Li-Ion and NiMH packs.
When designing with the LTC1479, select external N-channel MOSFETs with low RDS(on) at the available gate drive and verify that the adaptive current-limit thresholds coordinate with downstream regulator inrush behavior. Consult the manufacturer datasheet for MOSFET selection guidance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: LTC1479CG#PBF — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
LTC1479CG#TRPBF
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LTC1479IG#PBF
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LTC1479CG#PBF 仕様
| 機能 | Dual Battery PowerPath Controller |
| Battery Chemistry Support | Lead Acid, Li-Ion, NiCd, NiMH |
| Number of Battery Inputs | 2 battery packs + 1 DC source |
| 入力電圧範囲 | 6 V to 28 V |
| 動作温度 | 0C to +70C |
| パッケージ / ケース | 36-SSOP (0.209 in, 5.30 mm width) |
| 実装タイプ | Surface Mount |
| Packaging | Tube |
| Switch Control | External N-channel MOSFET gate control |
| Current Limiting | Adaptive current limiting (inrush reduction) |
| Compatible Chargers | LT1510, LT1511, LT1620/LTC1435 |
| カテゴリ | Battery Power Management IC |
| Manufacturer | Analog Devices Inc. |
| Typical Switching Frequency (system note) | 30 kHz (Typ) |
LTC1479CG#PBF 36-ssop (0.209 in, 5.30 mm width) ピン配置ガイド
LTC1479CG#PBF (36-ssop (0.209 in, 5.30 mm width) パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: LTC1479CG#PBF.
詳細は データシート をご参照ください。
主な用途
LTC1479CG#PBF の用途: 6 件s: Dual Battery Notebook Computers, Portable Instrument Power Management, AC Adapter Priority Power Systems, Multi-Chemistry Battery Platforms, Industrial Portable Data Terminals, Battery Hot-Swap Systems.
Dual Battery Notebook Computers
The LTC1479CG#PBF was designed primarily as the power management heart of single and dual battery notebook computers. In this role it arbitrates between two battery packs and the AC adapter DC input, steering the highest-priority valid source to the main switching regulator input while managing hot-swap inrush via adaptive MOSFET gate control. Its 6V to 28V input range covers standard 16V-20V notebook adapters and 2- to 4-cell Li-Ion stacks. Because the LTC1479 drives external N-channel MOSFETs, the designer selects switches with milliohm-class RDS(on) to keep series losses minimal during battery operation, directly extending runtime. Pairing with LT1511 or LTC1435 charging circuits creates a complete charge-and-power subsystem.
おすすめ
Portable Instrument Power Management
Battery-powered portable instruments benefit from the LTC1479CG#PBF ability to seamlessly hand off between an external DC supply and onboard battery packs without dropping the system rail. The adaptive current-limiting scheme controls external MOSFET gates during transitions, preventing inrush currents from discharging bypass capacitors or resetting the instrument electronics. Multi-chemistry support (Li-Ion, NiCd, NiMH, Lead Acid) lets instrument makers standardize on one power-path architecture across product variants with different battery types. The 36-SSOP surface-mount package suits compact instrument mainboards, and coordination with LT1510 charger circuits provides a proven, datasheet-supported topology for reliable field charging.
おすすめ
AC Adapter Priority Power Systems
Many portable and semi-portable systems must prefer wall-adapter power whenever present, using batteries only as backup. The LTC1479CG#PBF implements this source-priority logic natively: when a valid DC input within the 6V to 28V range is detected, it directs adapter power to the system regulator and can manage battery charging concurrently with companion charger ICs. When the adapter is removed, control transitions to the battery packs with gate-controlled soft switching to avoid voltage transients. This makes it well suited to docking-station-equipped devices, portable test equipment, and medical-style portable units where an unbroken system rail during plug and unplug events is a hard requirement.
おすすめ
Multi-Chemistry Battery Platforms
Product families that must support interchangeable battery types - Li-Ion for high energy density, NiMH for cost-sensitive variants, or Lead Acid for larger portable equipment - can share a single LTC1479CG#PBF power-path design because the controller is chemistry-agnostic on the power steering side. Actual charge algorithms live in the companion charger IC (LT1510, LT1511, or LT1620/LTC1435), selected per chemistry. This separation means the PowerPath layout, MOSFET selection, and PCB footprint remain constant across variants, cutting qualification cost. The adaptive current limiting is particularly valuable with Lead Acid packs, whose low source impedance can otherwise produce large connector inrush during hot insertion.
おすすめ
Industrial Portable Data Terminals
Handheld and vehicle-docked industrial data terminals run from battery in the field and from a dock or vehicle adapter when mounted. The LTC1479CG#PBF provides the required dual-battery or battery-plus-DC source arbitration with controlled transitions, and its 28V maximum input accommodates 24V industrial supply rails with headroom. Hot-swap events at the dock connector are handled by the adaptive inrush limiting, protecting both the dock contacts and the terminal supply rail. Designers should size external MOSFETs for the full input range and verify thermal behavior at maximum continuous load, as the controller itself dissipates little power but the series MOSFETs carry the full system current.
おすすめ
Battery Hot-Swap Systems
Equipment that permits changing a battery pack while the system runs - cameras, portable measurement gear, and modular handheld platforms - needs controlled inrush when the fresh pack contacts live terminals. The LTC1479CG#PBF addresses exactly this: its adaptive current-limiting scheme ramps the external MOSFET gate so the discharged bypass capacitors charge gradually instead of drawing a destructive spike through the pack connector. With support for two battery packs, one pack can be swapped while the other plus DC input maintains the system rail. This makes the LTC1479 a foundational part for any two-bay hot-swappable battery architecture in the 6V to 28V range.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: LTC1479CG#PBF — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | LTC1479CG#TRPBF | LTC1479IG#PBF |
|---|---|---|---|
| Package | 36-SSOP | 36-SSOP - same | 36-SSOP - same |
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Function | Dual Battery PowerPath Controller | Dual Battery PowerPath Controller | Dual Battery PowerPath Controller |
| Input Voltage Range | 6 V to 28 V | 6 V to 28 V | 6 V to 28 V |
| Battery Chemistries | Lead Acid, Li-Ion, NiCd, NiMH | Lead Acid, Li-Ion, NiCd, NiMH | Lead Acid, Li-Ion, NiCd, NiMH |
| Packaging Format | Tube | Tape & Reel | Tube |
主な差別化要因
- True dual-battery source arbitration （vs TPS2113APWRG4)
- Low-loss MOSFET-based power path （vs Integrated-switch mux ICs)
- Adaptive inrush limiting during hot-swap （vs LTC1479CG#TRPBF (packaging comparison))
設計ノート
The LTC1479 drives external N-channel MOSFETs, so the series resistance and current rating of those switches - not the IC itself - set the efficiency and thermal profile of the power path. Select MOSFETs with RDS(on) low enough that I^2*R losses stay acceptable at maximum system current across the full 6V to 28V input range, and confirm gate charge is compatible with the LTC1479 gate-drive capability so transition times remain controlled. Per the datasheet, the adaptive current limiting controls MOSFET gates during transitions to limit inrush; verify the limit coordinates with downstream bulk capacitor sizing on the regulator input.
A frequent error is treating the LTC1479 as a charger - it is a source-steering PowerPath controller only. Charge termination and chemistry-specific algorithms must be implemented by companion ICs such as the LT1510, LT1511, or LT1620/LTC1435, which the LTC1479 interfaces with directly. Also avoid substituting simpler power mux ICs like the TI TPS2113A: they are not pin-compatible and lack dual-battery arbitration. Finally, the commercial grade (CG) part is rated 0C to +70C; use the industrial IG variant if the ambient range extends below freezing.
Layout the 36-SSOP footprint from the manufacturer datasheet mechanical drawing so that both the #PBF (tube) and #TRPBF (tape and reel) variants assemble on the same land pattern. Route high-current MOSFET source/drain paths as short, wide traces or planes to minimize series inductance during source transitions, and place gate-drive traces away from high dV/dt switch nodes. Keep the input bulk and bypass capacitors close to the MOSFET common-drain node feeding the system regulator so that inrush limiting during hot-swap operates against a well-defined capacitance.
コンプライアンス情報
The #PBF suffix indicates Pb-free package per Analog Devices convention, but full RoHS/REACH declaration values were not present in the provided data and must be confirmed from the ADI product page compliance documents.
