TPS22990NDMLR - 10A, 5.5V, 3.9mOhm Load Switch | TI
MPN： TPS22990NDMLR ✓ 啟用中TPS22990NDMLR 概覽
A load switch is a power distribution switch, a type of power management IC that sits between a supply rail and its load to gate power on and off, control inrush current, and isolate faults. In the system hierarchy, it belongs to the family of high-side switches used in power trees alongside hot-swap controllers, e-fuses, and DC-DC converters, enabling fine-grained power sequencing and rail management.
Key differentiating features include an ultra-low 3.9 mOhm on-resistance, which minimizes both the voltage drop across the switch and conduction power loss at the full 10 A continuous current, and a wide 0.6 V to 5.5 V input voltage range that spans modern sub-1 V core rails up to standard 5 V rails. The adjustable slew rate (soft-start), set via an external capacitor, suppresses inrush current during turn-on, while the integrated PG output simplifies power-rail sequencing and monitoring without external supervisory circuitry.
The N-channel MOSFET architecture avoids the body-diode conduction and rds(on) penalties of older P-channel designs at high current. Internal control logic drives the gate with a controlled ramp defined by the CT pin capacitor, and the QOD option actively discharges the output when the switch is disabled, preventing floating rails in multi-rail systems. ESD protection on the pins adds robustness during assembly and handling.
Typical applications include SSD and storage power distribution, FPGA and processor core-rail sequencing, networking cards, battery-powered portable systems, and server backplane point-of-load switching, all of which benefit from low-loss high-current switching with controlled turn-on.
Design consideration: at 10 A, conduction loss is approximately I2 x R, so PCB copper pour on the IN and OUT pins is essential for thermal management.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 TPS22990NDMLR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TPS22990NDMLR （相同外形與佔位） — 差異在於 Product Type, Package, Power Good Indicator, Rise Time, RoHS Status.
TPS22990DMLR
✅ 直接替換聯絡詢價
查看資料表 →TPS22990DMLT
✅ 直接替換📋 參考替代品（不在目錄中）
TPS22990NDML
✅ 直接替換📋 參考替代品（不在目錄中）
TPS22991
✅ 直接替換📋 參考替代品（不在目錄中）
TPS22990NDMLR 最大額定值與電氣特性
| Product Type | Single-channel N-channel high-side load switch |
| 輸入電壓範圍 | 0.6 V to 5.5 V |
| Maximum Continuous Current | 10 A |
| On-Resistance | 3.9 mOhm (typical) |
| Number of Channels | 1 |
| Output Discharge Function | Yes (QOD, N version) |
| 軟啟動 | Yes, adjustable via external capacitor |
| Power Good Indicator | Yes, integrated PG output |
| Controlled Turn-On | Yes, adjustable slew rate |
| 工作溫度 | -40C to +105C |
| 封裝 | 10-WSON (3x2 mm) |
| 安裝類型 | Surface Mount |
| ESD Protection | Yes |
TPS22990NDMLR 10-wson (3x2 mm) 腳位配置指南
TPS22990NDMLR（10-wson (3x2 mm) 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： TPS22990NDMLR.
請參閱 資料表 以查看完整腳位配置。
典型應用
TPS22990NDMLR 適用於 6 應用s: SSD and Storage Power Distribution, FPGA and Processor Core-Rail Sequencing, Networking Cards and Line Cards, Battery-Powered Portable Systems, Server Point-of-Load Rail Gating, Industrial Control Power Distribution.
SSD and Storage Power Distribution
The TPS22990NDMLR fits SSD and storage subsystems where multiple rails must be gated with minimal series loss. Its 3.9 mOhm on-resistance drops only about 39 mV at the full 10 A continuous current, preserving voltage margin on low-voltage NAND and controller supply rails. The adjustable soft-start lets the designer ramp the turn-on with an external capacitor so large decoupling capacitance on the storage board does not create inrush droop on the upstream supply. The integrated PG indicator allows the host to verify rail validity before releasing the controller from reset, and the quick output discharge in the N version guarantees the rail reaches ground at shutdown, preventing data-corruption back-power paths. The compact 3x2 mm WSON-10 footprint conserves board area in dense storage form factors.
推薦
FPGA and Processor Core-Rail Sequencing
Multi-rail FPGAs and processors require strict power-up and power-down ordering. The TPS22990NDMLR serves as a sequencing element on medium-current rails: its integrated PG output signals when the switched rail is within regulation, enabling the next rail in the sequence through downstream enable logic. The 0.6 V to 5.5 V input range covers modern core rails down to sub-1 V domains as well as 5 V I/O rails. At the 10 A maximum continuous current, the 3.9 mOhm on-resistance contributes only about 39 mV of drop, which is significant on 0.8 V core rails where margin is scarce. The QOD function actively discharges the rail at turn-off, supporting controlled power-down sequences and preventing latch-up conditions from floating gate supplies.
推薦
Networking Cards and Line Cards
High-density networking and line cards use point-of-load switching to power zones independently for hot-swap-style isolation and dynamic power management. The TPS22990NDMLR provides a single-channel 10 A switch with controlled turn-on, so large decoupling banks on card sections are charged without excessive inrush. The wide 0.6 V to 5.5 V input range allows one switch SKU to be reused across 1.0 V, 1.8 V, 3.3 V, and 5 V zone rails, simplifying the bill of materials. The 3.9 mOhm on-resistance keeps conduction loss near 3.9 W at full 10 A load, so generous copper pour on the WSON-10 thermal pad maintains junction temperature within the -40C to +105C operating range specified in the TI datasheet.
推薦
Battery-Powered Portable Systems
In battery-powered portable devices, load switches disconnect inactive subsystems to extend runtime. The TPS22990NDMLR operates from input rails as low as 0.6 V, compatible with single-cell chemistry front ends and boost outputs, while its low 3.9 mOhm on-resistance minimizes wasted energy in series conduction. The adjustable soft-start protects the battery from inrush spikes into large bulk capacitance during wake-up events. The PG output gives the power-management MCU immediate confirmation that the switched rail stabilized, and the quick output discharge ensures a powered-down peripheral does not float and parasitically draw current. DigiKey notes the part ships today, supporting portable-product build schedules as of 2026-10-19.
推薦
Server Point-of-Load Rail Gating
Server and datacenter platforms gate individual point-of-load rails for power capping, thermal management, and fault isolation. The TPS22990NDMLR provides a 10 A, 3.9 mOhm high-side switch that slots between a VRM output and the load, with about 39 mV drop at full current so downstream regulation accuracy is preserved. The controlled, adjustable turn-on prevents multi-amp inrush when large output capacitor banks are present, and the PG indicator integrates into platform power-good chains managed by a baseboard controller or CPLD. The QOD function supports controlled power-down for rails that must not back-power shared buses. The 3x2 mm WSON-10 package and -40C to +105C range suit high-density server boards.
推薦
Industrial Control Power Distribution
Industrial controllers distribute power to sensors, actuators, and communication modules that are enabled and disabled during operation. The TPS22990NDMLR gates these loads with 3.9 mOhm on-resistance, so high-current loads up to 10 A experience minimal voltage sag on shared rails. The 0.6 V to 5.5 V input range covers logic-level distribution rails, and the adjustable slew rate limits inrush on long, capacitive wiring harnesses. The PG output allows the PLC or industrial MCU to verify that a switched zone reached regulation before enabling the associated driver, improving fault diagnostics. Its -40C to +105C operating range per the TI datasheet matches typical industrial ambient requirements, and ESD protection aids assembly robustness.
推薦
推薦產品摘要
工程參考資料，適用於 TPS22990NDMLR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TPS22990DMLR | TPS22990DMLT | TPS22990NDML | TPS22991 |
|---|---|---|---|---|---|
| Package | 10-WSON (3x2 mm) | 10-WSON (3x2 mm) - same | 10-WSON (3x2 mm) - same | 10-WSON (3x2 mm) - same | 10-WSON (3x2 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
主要差異化特點
- Integrated quick output discharge (QOD) (對比TPS22990DMLR)
- Ultra-low 3.9 mOhm on-resistance at 10 A (對比TPS22991)
- Integrated PG indicator plus adjustable soft-start in one package (對比TPS22990DMLT)
設計說明
Estimated: at the full 10 A continuous load, conduction loss is I2 x R = 10 A squared x 3.9 mOhm, which is approximately 3.9 W. The WSON-10 (3x2 mm) package relies heavily on PCB copper for heat extraction, so provide large, well-connected pours on the IN and OUT pins and the exposed pad. Derate current if airflow is absent; verify junction temperature stays below the -40C to +105C datasheet operating range in your worst-case ambient.
Use the CT pin capacitor to set the turn-on slew rate so inrush into large output capacitance stays within upstream supply limits. The soft-start ramp trades startup time against inrush: larger CT capacitors give slower, gentler ramps. In multi-rail systems, chain the PG output into the enable logic of the next switch or regulator so rails power up in order and power down in reverse order using the QOD function.
Place the CT capacitor close to the CT pin and keep the high-current IN-to-OUT path as short and wide as possible with multiple vias to internal planes. Star-ground the control-side components (CT, PG pull-up, EN divider) away from the high-current return path to avoid ground bounce corrupting the PG threshold. The exposed pad under the WSON-10 must be soldered to the thermal land for both thermal and electrical performance.
Do not confuse the TPS22990 (non-N) and TPS22990N (with QOD) when ordering: the NDMLR includes quick output discharge, while DMLR/DMLT parts do not, which changes power-down behavior. Also confirm the pinout against the datasheet before substituting other load-switch families - the TI E2E forum documents that some seemingly standard load switches have non-standard pin arrangements, so pin-to-pin compatibility must be verified, not assumed.
合規資訊
Compliance status was not stated in the retrieved web data; verify RoHS/REACH status on the official TI product page for TPS22990NDMLR.
