TPS22990NDMLT - 10A, 5.5V, 3.9mOhm Load Switch | TI
부품 번호: TPS22990NDMLT ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $1.43 | $1.43 |
| 10 | $1.29 | $12.90 |
| 100 | $1.16 | $116.00 |
| 500 | $1.09 | $545.00 |
| 1,000 | $1.02 | $1,020.00 |
TPS22990NDMLT 개요
A load switch is a power management IC that sits between a supply rail and its load, using an internal MOSFET to connect or disconnect power under logic control. Load switches belong to the broader family of power distribution switches and hot-swap devices within power management ICs. They protect downstream circuitry during power sequencing, limit inrush current, and isolate faulty or idle loads to save energy in multi-rail systems.
Key differentiating features of the TPS22990NDMLT include the very low 3.9 mOhm on-resistance, which minimizes conduction losses at the full 10 A continuous current (approximately 0.39 W of estimated I2R dissipation), the wide 0.6 V to 5.5 V input range that supports low-voltage core rails as well as standard 5 V and 3.3 V rails, adjustable rise time for inrush-current control, and soft-start behavior. An integrated power-good output simplifies rail monitoring and power-sequencing handshakes, and the TPS22990N variant adds optional output discharge functionality to actively pull the output low when the switch is off.
Technically, the device uses an N-channel MOSFET as the pass element and requires a bias supply above the input rail to fully enhance the switch, keeping the on-resistance low even at sub-volt input levels. The controlled turn-on circuitry charges the output gradually, with the slew rate settable by an external capacitor, allowing designers to trade startup time against inrush current and voltage droop on the upstream rail.
Typical applications include SSD and storage power distribution, server and datacenter point-of-load switching, FPGA and ASIC core-rail power sequencing, battery-powered portable systems, and industrial 5 V rail isolation.
When designing with this part, provide a solid ground plane and adequate copper area for the VOUT pins, since 10 A of continuous current demands low-impedance thermal and electrical paths.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
드롭인 대체품: TPS22990NDMLT — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: TPS22990NDMLT (동일 폼 팩터 및 풋프린트) — 차이점: Power Good Indicator, Product Type.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
TPS22990DMLT
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
TPS22990NDMLR
✅ 드롭인✓ 재고 있음
$0.47 / 개
데이터시트 보기 →TPS22990DMLR
✅ 드롭인✓ 재고 있음
$0.95 / 개
데이터시트 보기 →TPS22990NDMLT 최대 정격 & 전기적 특성
| Product Type | Single-channel load switch (N-channel high-side) |
| 입력 전압 범위 | 0.6 V to 5.5 V |
| Maximum Continuous Current | 10 A |
| On-Resistance (RON) | 3.9 mOhm |
| Number of Channels | 1 |
| Output Discharge | Optional (TPS22990N variant feature) |
| Power Good Indicator | Yes (integrated PG output) |
| 상승 시간 | Adjustable / controlled turn-on |
| 소프트 스타트 | Yes |
| 동작 온도 | -40C to +105C |
| 패키지 | 10-WSON (3x2 mm) |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
| Unit Price (Reference) | USD 1.4254 (distributor unit price, as of 2026-10-19) |
TPS22990NDMLT 10-wson (3x2 mm) 핀 구성 가이드
TPS22990NDMLT(10-wson (3x2 mm) 패키지)의 핀 구성입니다. 핀 번호, 기능, 연결 다이어그램은 제조사 데이터시트에 정의되어 있습니다. 정확한 풋프린트와 솔더링 지침은 해당 문서를 참조하십시오.
다음에 대한 상세 핀아웃 데이터 없음: TPS22990NDMLT.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
TPS22990NDMLT 적합 용도: 6 애플리케이션s: SSD and Storage Power Distribution, Server and Datacenter Point-of-Load Switching, FPGA and ASIC Core Rail Power Sequencing, Battery-Powered Portable Systems, Industrial 5V Rail Isolation and Protection, Test and Measurement Instrument Power Gating.
SSD and Storage Power Distribution
The TPS22990NDMLT fits SSD and storage module power distribution because its 3.9 mOhm on-resistance and 10 A continuous rating cover the peak currents of high-bandwidth NAND arrays with only about 39 mV of drop at full load. Placed between the 3.3 V or 5 V input rail and the storage controller domain, its adjustable soft-start limits inrush into the large bulk capacitance typical of storage modules, preventing upstream sag. The integrated power-good output lets the controller confirm rail validity before releasing the interface, supporting hot-plug style power management.
추천
Server and Datacenter Point-of-Load Switching
In server and datacenter systems, the TPS22990NDMLT acts as a high-current isolation and sequencing element on 0.6 V to 5.5 V point-of-load rails. Its 10 A rating and 3.9 mOhm RON keep conduction losses near an estimated 0.39 W at full load, easing thermal design in dense chassis. The power-good flag enables the rail-dependent handshakes multi-rail servers require, and the optional output discharge of the TPS22990N version ensures dormant boards do not leave floating rails, improving fault isolation and brownout recovery behavior across blades and mezzanine cards.
추천
FPGA and ASIC Core Rail Power Sequencing
FPGA and ASIC power-up sequences often demand precise rail order and valid-rail confirmation. The TPS22990NDMLT serves as the final staging switch ahead of a core or I/O bank: its controlled, adjustable turn-on ramps the rail slowly into large decoupling networks, while the PG output signals the sequencer or microcontroller that the rail is within tolerance. With a 0.6 V minimum input it even switches sub-volt rails that many load switches cannot handle, and its 10 A capacity covers current-hungry core domains of mid-range devices.
추천
Battery-Powered Portable Systems
Portable and battery-operated equipment benefits from the TPS22990NDMLT's wide 0.6 V to 5.5 V input range, which tracks a discharging single-cell or multi-cell source without losing switch enhancement, thanks to the N-channel MOSFET architecture with bias assist. The low 3.9 mOhm on-resistance minimizes series drop and wasted energy during high-current bursts such as RF power amplifier or motor pulses. The optional output discharge fully powers down downstream circuitry, eliminating leakage through floating loads, which is a meaningful saving in standby power budgets for handheld instruments.
추천
Industrial 5V Rail Isolation and Protection
On industrial 24 V systems, downstream 5 V rails derived from a wide-VIN buck can use the TPS22990NDMLT as a local isolation switch rated to 5.5 V input and 10 A. Its -40C to +105C operating range suits factory-floor temperature extremes, and the adjustable rise time tames inrush when re-energizing heavily capacitive sensor or actuator branches after a fault. The PG output feeds a PLC or monitoring MCU so that a browned-out branch is detected and isolated without disturbing the rest of the distribution network, improving system availability.
추천
Test and Measurement Instrument Power Gating
Bench and modular instruments frequently gate whole functional blocks to manage thermal load and noise. The TPS22990NDMLT provides a clean, low-drop switch for up to 10 A blocks with only milliohm-level series impedance, so measurement accuracy of the powered section is unaffected. The controlled turn-on prevents step loads on shared lab supplies, and the power-good indicator supports self-test routines that verify each gated domain before calibration. Operating from -40C to +105C, it also fits the environmental chamber corners such instruments must validate.
추천
추천 제품 요약
엔지니어링 참조 데이터: TPS22990NDMLT — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TPS22990DMLT | TPS22990NDMLR | TPS22990DMLR |
|---|---|---|---|---|
| Package | 10-WSON (3x2 mm) | 10-WSON (3x2 mm) - same | 10-WSON (3x2 mm) - same | 10-WSON (3x2 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| On-Resistance | 3.9 mOhm | 3.9 mOhm | 3.9 mOhm | 3.9 mOhm |
| Maximum Continuous Current | 10 A | 10 A | 10 A | 10 A |
| Input Voltage Range | 0.6 V to 5.5 V | 0.6 V to 5.5 V | 0.6 V to 5.5 V | 0.6 V to 5.5 V |
| Output Discharge | Yes (optional, N version) | No (output floats when off) | Yes (optional) | No (output floats when off) |
| Power Good Indicator | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C |
| Packing Format | Tape & Reel (T suffix, standard qty) | Tape & Reel (T suffix) | Reel (R suffix, larger qty) | Reel (R suffix, larger qty) |
주요 차별점
- Very low conduction loss at high current (vs TPS22990DMLT)
- Integrated power-good for sequencing (vs TPS22990DMLR)
- Sub-volt input capability (vs Typical 20-100 mOhm commodity load switches)
설계 노트
Estimated: at 10 A continuous load, conduction loss in the 3.9 mOhm switch is I2R = 100 x 0.0039 = 0.39 W, plus switching and gate-drive losses. The 10-WSON (3x2 mm) package relies on its soldered thermal pad and PCB copper for heat extraction; allocate at least 1 square inch of 2-oz copper on the VOUT/GND planes and add thermal vias to inner layers. Verify junction temperature against the +105C maximum operating rating at your worst-case ambient, especially in enclosed server chassis with limited airflow.
Route the 10 A path with wide, short copper: paralleled VOUT and VIN pins must connect to planes, not thin traces, to keep milliohm-level parasitic resistance from dominating the 3.9 mOhm switch resistance. Place the rise-time timing capacitor close to its pin to avoid noise coupling into the controlled turn-on circuit, and keep the PG pull-up resistor (typically 10k to 100k ohm to the logic rail) near the device. Follow the TI datasheet layout section for the 10-WSON thermal pad stencil and via pattern.
Do not assume a generic IN-OUT-GND-EN load switch pinout: TI's E2E forum documents that this family does not follow the conventional layout, and its sibling TPS22991 caused a redesign when a generic footprint was assumed. Confirm the pin map against the official tps22990.pdf before layout. Also verify whether your system needs the output discharged when off - only the TPS22990N versions (including TPS22990NDMLT) offer optional output discharge; the base TPS22990 floats the output, which can back-power downstream ICs through protection diodes.
Size the adjustable turn-on for the downstream bulk capacitance: a slower ramp reduces inrush but extends startup, while an aggressive ramp can momentarily exceed the 10 A rating or trip upstream protection. Estimate inrush as I = C_load x dV/dt; for example, an estimated 100 uF bank charged to 5 V in 1 ms draws about 0.5 A of inrush on top of load current. Confirm bias supply requirements in the datasheet, since the N-channel pass element needs adequate gate drive to maintain the 3.9 mOhm on-resistance at low input voltages.
규정 준수 정보
RoHS compliance indicated by distributor listings; LCSC notes soft-start and output discharge features. AEC-Q100 and other environmental attributes were not itemized in retrieved data - verify via TI product page certificate of conformance.
