LM73100RPWR - 5.5A Ideal Diode Load Switch, 2.7-23V, VQFN-HR-10 | TI
部品番号: LM73100RPWR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.18 | $11.80 |
| 100 | $0.95 | $95.00 |
| 500 | $0.82 | $410.00 |
| 1,000 | $0.71 | $710.00 |
| 3,000 | $0.62 | $1,860.00 |
LM73100RPWR 概要
What is an ideal diode? An ideal diode is an active circuit that emulates a forward-biased rectifier using a MOSFET and a control loop, achieving much lower forward voltage drop than a Schottky diode while also providing reverse-current blocking. Ideal diodes belong to the broader ORing controller / power-path protection category within power management ICs, and they are widely used in N+1 redundant supply architectures, battery backup systems, and USB Type-C power delivery paths where minimizing conduction loss and heat is critical.
Key features of the LM73100RPWR include 28 mOhm Rds(on) (typ), 5.5 A continuous load current capability, an analog current monitor output (IMON) for accurate load-current sensing, input reverse-polarity protection, overvoltage lockout, inrush-current control with adjustable slew rate, and an operating junction temperature range of -40C to +125C. The HotRod QFN package provides low parasitic inductance and improved thermal performance versus conventional wire-bonded QFN packages of similar size.
The architecture combines a charge-pump-driven N-channel pass FET with a fast ideal-diode control loop that responds to reverse current within microseconds. The current-monitor pin produces an analog current proportional to the load current, enabling closed-loop power budgeting, fault telemetry, and system health monitoring without a discrete sense resistor. Internal diagnostics include thermal warning, fault flag output, and load-fault timer.
Typical applications include USB Type-C Power Delivery (PD) power-path switching in laptops and tablets, N+1 redundant power supply ORing, battery backup systems in industrial and telecom equipment, eFuse / hot-swap circuits in enterprise servers, and high-side load switching with reverse-polarity protection in factory automation modules.
When designing with this part, place input and output bulk capacitors close to the VIN and VOUT pins to minimize ringing. Use the ILIM resistor to set the fast-trip threshold and the dVdt capacitor to control the inrush slew rate, both per the datasheet typical-application circuit. For 5 A continuous operation, provide at least 100 mm^2 of copper pour on the RPW thermal pad to keep the junction below 125C.
This page synthesizes distributor pricing, drop-in alternatives in the same VQFN-HR-10 footprint, and practical layout and protection guidance drawn from the manufacturer datasheet - information not consolidated on a single distributor page.
ドロップイン代替品: LM73100RPWR — 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:
LM73100RPWT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LM73100RPWRG4
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS25948
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS25948-Q1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS25200
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LM73100RPWR 最大定格＆電気的特性
| Product Type | Integrated ideal diode / load switch with protection |
| 入力電圧範囲 | 2.7 V to 23 V |
| Continuous Load Current | 5.5 A |
| On-Resistance (Rds(on), typ) | 28 mOhm |
| Number of Channels | 1 |
| トポロジー | N+1 ORing controller, N-Channel 1:1 |
| Reverse Polarity Protection | Yes (input) |
| Overvoltage Protection | Yes (adjustable) |
| Overcurrent / Short-Circuit Protection | Yes (adjustable via ILIM) |
| 熱シャットダウン | Yes (with auto-retry) |
| Current Monitor Output (IMON) | Yes (analog) |
| Adjustable Slew Rate (dVdt) | Yes |
| 静止電流 | 426 uA |
| 動作接合温度 | -40C to +125C |
| パッケージ | VQFN-HR-10 (RPW) 2 mm x 2 mm |
| 実装タイプ | Surface Mount (HotRod QFN) |
| MSLレベル | MSL Level-2-260C-1 YEAR |
| RoHS / Green Compliance | RoHS & Green compliant |
LM73100RPWR ピン構成
| ピン 1 | IN — Power input - supply to the load |
| ピン 2 | GND — Ground reference |
| ピン 3 | IMON — Analog current-monitor output (current source proportional to load) |
| ピン 4 | ILIM — Current-limit threshold set resistor |
| ピン 5 | dVdt — Slew-rate / inrush control capacitor |
| ピン 6 | FLG — Open-drain fault flag output |
| ピン 7 | EN — Active-high enable input |
| ピン 8 | PG — Open-drain power-good output |
| ピン 9 | OUT — Power output to the load |
| ピン 10 | OUT — Power output to the load (bonds to internal FET and exposed pad) |
主な用途
LM73100RPWR の用途: 6 件s: USB Type-C Power Delivery Power-Path Switching, N+1 Redundant Power Supply ORing, Battery Backup and Power-Path Management, Industrial 24 V Hot-Swap / eFuse, Server and Storage 12 V Load Switch, Portable Medical and Wearable Device Protection.
USB Type-C Power Delivery Power-Path Switching
The LM73100RPWR is well suited for USB Type-C Power Delivery power-path switching in laptops, tablets, and docking stations. Its 2.7 V to 23 V input range covers all standard PD source voltages (5 V, 9 V, 15 V, 20 V), the 5.5 A continuous rating supports 100 W PD3.0 EPR operation, and the 28 mOhm Rds(on) minimizes conduction loss - at 5 A this is only 140 mV drop versus 250-500 mV across a Schottky. The integrated ideal diode blocks reverse current when two PD sources are ORed for dual-port charging. Use the dVdt pin to set an inrush-limited startup that meets USB-C attach timing requirements.
おすすめ
N+1 Redundant Power Supply ORing
In N+1 redundant power supply architectures (telecom, datacenter, industrial), the LM73100RPWR provides per-rail ORing between parallel PSU outputs. The integrated ideal diode replaces discrete Schottky + fuse approaches with sub-microsecond reverse-current blocking, hot-swap capability, and accurate IMON telemetry for per-rail load monitoring. The 5.5 A rating covers typical 100-150 W blade-server rails, and the 23 V abs-max input handles transient 24 V bus spikes. Adjustable ILIM allows per-rail current-share tuning during maintenance handoffs.
おすすめ
Battery Backup and Power-Path Management
The LM73100RPWR is an excellent choice for battery backup power-path management in industrial gateways, IoT base stations, and PoE-powered devices. It switches seamlessly between a primary supply and a Li-ion/LiFePO4 backup battery using its ideal-diode function, with <1 us handoff that keeps downstream MCUs and radios running through supply interruptions. The 2.7 V lower-input threshold supports 1S Li-ion cutoff, while the 23 V upper bound tolerates industrial 24 V rails. Reverse-polarity protection on VIN prevents battery damage if a field technician miswires the input.
おすすめ
Industrial 24 V Hot-Swap / eFuse
For industrial 24 V factory-automation modules, PLCs, and sensor hubs, the LM73100RPWR acts as a compact eFuse that provides hot-plug insertion, inrush limiting, and electronic circuit-breaker protection on a single 4 mm^2 footprint. The 23 V abs-max covers 24 V nominal with 4% tolerance, the adjustable ILIM lets designers set per-port current limits, and the integrated thermal shutdown with auto-retry survives sustained short-circuit events on miswired field cables. The analog IMON output feeds a microcontroller ADC for real-time load monitoring.
おすすめ
Server and Storage 12 V Load Switch
In enterprise servers, NVMe storage arrays, and PCIe backplanes, the LM73100RPWR serves as a 12 V high-side load switch with integrated protection. The 28 mOhm Rds(on) at 5.5 A dissipates only ~0.85 W - far less than a discrete MOSFET+driver implementation, allowing placement close to hot-swap connectors. Integrated reverse-current blocking is critical during dual-feed topologies, while the FLG output drives a CPLD for per-rail fault reporting. The -40C to +125C rating covers data-center intake-to-exhaust thermal gradients.
おすすめ
Portable Medical and Wearable Device Protection
The LM73100RPWR delivers compact, low-loss power-path protection for portable medical devices such as patient monitors, infusion pumps, and wearable health trackers. Its 4 mm^2 footprint fits inside wrist-worn enclosures, the 426 uA quiescent current preserves battery life between measurements, and the integrated ideal diode enables seamless USB-charging / battery handoff without a Schottky's 0.3-0.5 V forward drop. The 5.5 A rating is generous for these <2 A applications, providing thermal headroom for sealed plastic enclosures without a heatsink.
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: LM73100RPWR — 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 | LM73100RPWT | LM73100RPWRG4 | TPS25948 | TPS25948-Q1 | TPS25200 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VQFN-HR-10 (RPW) 2x2 mm | VQFN-HR-10 (RPW) 2x2 mm - same | VQFN-HR-10 (RPW) 2x2 mm - same | VQFN-HR-10 (RPW) 2x2 mm - same | VQFN-HR-10 (RPW) 2x2 mm - same | VQFN-HR-10 (RPW) 2x2 mm - same |
| Input Voltage Range | 2.7 V to 23 V | 2.7 V to 23 V - same | 2.7 V to 23 V - same | 3 V to 23 V | 3 V to 23 V | 2.5 V to 6.5 V |
| Continuous Load Current | 5.5 A | 5.5 A - same | 5.5 A - same | 5 A (-9%) | 5 A (-9%) | 5 A (-9%) |
| On-Resistance (typ) | 28 mOhm | 28 mOhm - same | 28 mOhm - same | 30 mOhm | 30 mOhm | 30 mOhm |
| Integrated Ideal Diode | Yes | Yes - same | Yes - same | No (eFuse only) | No (eFuse only) | No (eFuse only) |
| IMON Current Monitor | Yes (analog) | Yes - same | Yes - same | No | No | No |
| Automotive Grade (AEC-Q100) | No | No | No | No | Yes (qualified) | No |
| Reverse-Polarity Protection | Yes (input) | Yes - same | Yes - same | Yes | Yes | No |
主な差別化要因
- Integrated ideal diode with analog current monitor （vs TPS25948)
- Wide 2.7-23 V input range covers both 5 V USB and 24 V industrial （vs TPS25200)
- Automotive-grade option in the same footprint （vs TPS25948-Q1)
設計ノート
Estimated: At 5 A continuous load with VIN = 12 V and VOUT drop of 28 mOhm, the LM73100RPWR dissipates approximately 5 A * 5 A * 0.028 ohm = 0.7 W internally. The VQFN-HR-10 (RPW) package with a 100 mm^2 copper-pour thermal pad on a 1 oz 4-layer PCB typically achieves theta_JA near 55 C/W, giving a junction temperature rise of 0.7 W * 55 C/W = 38.5 C above ambient. At 85 C ambient the junction is approximately 123.5 C - just under the 125 C limit. Designers targeting 70 C ambient with margin should increase the copper pour to 200 mm^2 or use external heatsinking. Always refer to the datasheet SOA curve for final thermal validation.
Place a 1 uF / 35 V X7R ceramic capacitor (e.g., GRM21BR71H105KA12L) within 2 mm of the IN pin and a 22 uF / 35 V ceramic or polymer (e.g., GRM32ER71H226KE15L) within 5 mm of the OUT pin to suppress switching transients and provide the bulk capacitance required by the ideal-diode loop. Connect the RPW thermal pad to a 100 mm^2 copper pour on the top layer with at least 6 thermal vias (0.3 mm drill, 0.5 mm pad) to inner-layer ground planes. Keep the IMON, ILIM, dVdt, and FLG traces away from the OUT power path to avoid noise injection into the current-monitor output.
Three common pitfalls when using the LM73100RPWR: (1) Do not leave the dVdt pin floating - without the capacitor, the inrush is uncontrolled and the part can latch into overcurrent during hot-plug. A 10 nF to 100 nF capacitor sets a safe inrush slew rate. (2) The ILIM pin must have a resistor to GND; floating ILIM disables current protection. (3) Do not apply a reverse voltage greater than the abs-max (typically -0.3 V) on the OUT pin without external blocking - although the ideal diode blocks reverse current, sustained OUT-negative transients can damage the body diode path. Always consult the datasheet Section 8 for absolute maximum ratings.
コンプライアンス情報
RoHS & Green compliance per PartGenie parts database and TI product page. Not AEC-Q100 qualified - for automotive, see TPS25948-Q1. REACH status not explicitly stated in TI datasheet; refer to TI's REACH declaration. MSL Level-2-260C-1 YEAR per PartGenie (3rd party). Halogen-free status not confirmed in provided data.
