TPS22990DMLR - 10A, 5.5V, 3.9mOhm Load Switch | TI
부품 번호: TPS22990DMLR ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.35 | $135.00 |
| 500 | $1.12 | $560.00 |
| 1,000 | $0.95 | $950.00 |
TPS22990DMLR 개요
A load switch is a power distribution IC that sits between a supply rail and its load, using an internal MOSFET pass element to connect, disconnect, and protect the rail. In the power-management hierarchy, load switches are siblings of hot-swap controllers and eFuses within power distribution ICs, and they are commonly paired with DC-DC converters and LDO regulators to sequence and gate individual rails.
Key features of the TPS22990 include the ultra-low 3.9 mOhm on-resistance, which minimizes voltage drop and conduction power loss at high load currents; controlled and adjustable turn-on slew rate via an external CT capacitor, which suppresses inrush current and bus voltage sag; and an integrated power-good (PG) indicator for rail monitoring and sequencing. An optional quick output discharge (QOD) function actively pulls the output low when the switch is off.
Architecturally, the device integrates an N-channel MOSFET pass element with gate-drive circuitry powered from a VBIAS supply, allowing the switch to operate down to 0.6 V input while supporting modern low-voltage rails. The adjustable rise time lets designers trade startup time against inrush current for a given output capacitance.
Typical applications include server and notebook point-of-load power gating, SSD and storage rail switching, multi-rail power sequencing in SoC and FPGA systems, and battery-powered equipment where low voltage drop is critical.
A key design consideration: at 10 A, even 3.9 mOhm dissipates roughly 0.39 W, so PCB copper area under the exposed pad is essential for thermal management.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
드롭인 대체품: TPS22990DMLR — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: TPS22990DMLR (동일 폼 팩터 및 풋프린트) — 차이점: Product Type, Package, Power Good Indicator, Rise Time, RoHS Status.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
TPS22990DMLT
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TPS22990NDMLR
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$0.47 / 개
데이터시트 보기 →TPS22990DMLR 최대 정격 & 전기적 특성
| Product Type | Single-channel load switch (high-side) |
| Channel Count | 1 |
| Pass Element | N-channel MOSFET |
| 입력 전압 범위 | 0.6 V to 5.5 V |
| Maximum Continuous Current | 10 A |
| On-Resistance (typical) | 3.9 mOhm |
| On-Resistance (max) | 6 mOhm |
| 상승 시간 | Adjustable via external CT capacitor |
| 파워 굿 출력 | Yes, integrated PG indicator |
| Quick Output Discharge | Optional (TPS22990N variant differs) |
| Maximum Operating Temperature | +105 C |
| 패키지 | 10-WSON (3x2 mm), DML |
| 장착 스타일 | SMD/SMT |
| MSL 레벨 | 2 (260 C, 1 year) |
| RoHS 상태 | RoHS & Green compliant |
| Packaging | Tape & Reel (DMLR suffix) |
TPS22990DMLR 10-wson (3x2 mm), dml 핀 구성 가이드
TPS22990DMLR(10-wson (3x2 mm), dml 패키지)의 핀 구성입니다. 이 전력 소자는 게이트, 드레인, 소스 단자를 갖추고 있습니다. 비편향 패키지의 경우 정확한 핀 1 방향과 풋프린트 세부 정보는 제조사 데이터시트를 참조하십시오. 일반적인 응용 분야로는 전원 공급 장치 설계, 모터 구동, 부하 스위칭이 있습니다.
다음에 대한 상세 핀아웃 데이터 없음: TPS22990DMLR.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
TPS22990DMLR 적합 용도: 6 애플리케이션s: Server Point-of-Load Power Gating, Notebook and Tablet Rail Sequencing, SSD and Storage Power Switching, FPGA and SoC Multi-Rail Power-Up Ordering, Battery-Powered Test and Portable Instruments, Telecom and Networking Card Power Distribution.
Server Point-of-Load Power Gating
In servers, individual boards carry many rails in the 0.6 V to 5.5 V range feeding SoCs, DIMMs, and NICs. The TPS22990DMLR fits these rails precisely: its 0.6 V minimum input supports modern core voltages, and 10 A capability with 3.9 mOhm on-resistance keeps conduction loss to about 0.39 W at full load - roughly a 39 mV drop that preserves voltage margin on tight-tolerance rails. The adjustable CT-controlled turn-on limits inrush when gating large bulk capacitance on a board, preventing upstream converter droop, while the power-good output lets a hot-swap or sequencer controller confirm rail validity before enabling the next stage. Place the switch close to the load with a solid ground plane under the exposed pad; at 10 A, copper resistance in the power path becomes a meaningful part of total loss, so wide traces (at least 5 mm per 10 A) are recommended.
추천
Notebook and Tablet Rail Sequencing
Battery-powered notebooks and tablets switch multiple low-voltage rails (1.0 V to 3.3 V) to cut standby power and enforce startup order. The TPS22990DMLR suits this role because it operates down to 0.6 V input, supporting the lowest core and memory rails, while its 3.9 mOhm resistance avoids wasting battery power in the switch itself. The CT pin sets a controlled slew rate so large output capacitors charge without inrush-induced brownouts, and the power-good flag enables cascaded sequencing where each rail enables the next only after confirming valid output. The quick output discharge option actively pulls the rail low at shutdown, preventing floating rails that can back-bias SoC I/O structures. In the +105 C maximum operating range, a thin 3x2 mm WSON near a hot keyboard deck still needs thermal vias to spread the estimated 0.39 W of conduction heat at sustained 10 A loads.
추천
SSD and Storage Power Switching
SSD controllers draw multi-amp transient currents on 3.3 V and 1.2 V rails, and storage systems benefit from being able to hard-gate a drive for reset or power cycling. The TPS22990DMLR handles these rails with only 3.9 mOhm of series resistance, so the drive sees nearly full rail voltage even at 10 A peaks, and the switch itself dissipates an estimated 0.39 W at full continuous load. The adjustable turn-on is valuable when hot-plugging or sequencing a drive with substantial decoupling capacitance, since a slow, CT-controlled ramp prevents connector-contact stress and upstream sag. The power-good output reports to the storage controller or BMC whether the drive rail is valid, supporting fault isolation in enterprise storage enclosures. For boards switching several drives, the same layout pattern - exposed pad to a stitched ground plane - should be replicated on each channel.
추천
FPGA and SoC Multi-Rail Power-Up Ordering
FPGAs and application processors specify strict power-up ordering between core, aux, and I/O rails. The TPS22990DMLR implements rail sequencing economically: place it on rails that share a common converter output, drive the ON pin from the power-good signal of the preceding stage, and let the integrated PG output chain to the next switch. Because the input range extends down to 0.6 V, it can gate core rails directly. The CT-adjustable slew rate lets each rail rise in a controlled fashion, which both satisfies sequencing timing diagrams and limits inrush into large decoupling networks typical of FPGA designs (hundreds of microfarads). The optional quick output discharge ensures rails fall promptly at shutdown so a subsequent power cycle starts from zero volts - important for repeatable bring-up during firmware development and automated burn-in testing of SoC boards.
추천
Battery-Powered Test and Portable Instruments
Portable instruments switching loads from single-cell lithium or multi-cell alkaline stacks benefit from the TPS22990DMLR's low 0.6 V floor and 5.5 V ceiling, which spans the useful range of battery stacks and boosted rails. With 3.9 mOhm on-resistance, the switch drops only about 39 mV at 10 A - far less than the 100 to 200 mV of generic load switches - preserving runtime by minimizing wasted energy. The controlled turn-on protects sensitive analog front ends from inrush transients when sections of the instrument are powered up selectively, and the power-good output can gate the enable of measurement circuitry so ADCs never sample a rail that is not settled. Estimated conduction loss at full load is 0.39 W, which in a sealed handheld enclosure at +105 C rating still warrants thermal vias beneath the 3x2 mm WSON package.
추천
Telecom and Networking Card Power Distribution
Line cards and network switches distribute 3.3 V and 5 V rails to many subsystems, each of which may need independent gating for hot-swap-like behavior, fault isolation, and inrush management. The TPS22990DMLR provides a 10 A, 3.9 mOhm channel per subsystem, and its CT-controlled ramp prevents the large current step that tripping upstream breakers or ORing controllers would otherwise see when a card section energizes. The power-good indicator feeds back to the card CPLD or BMC for health monitoring, and the quick output discharge lets the controller remove a faulted subsystem cleanly. Operating up to +105 C ambient suits forced-air telecom shelves; at 10 A continuous, design the power pour under the WSON exposed pad with an array of at least 4x4 thermal vias to keep junction temperature within limits.
추천
추천 제품 요약
엔지니어링 참조 데이터: TPS22990DMLR — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TPS22990DMLT | TPS22990NDMLR |
|---|---|---|---|
| Package | 10-WSON (3x2 mm, DML) | 10-WSON (3x2 mm, DML) - same | 10-WSON (3x2 mm, DML) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Maximum Continuous Current | 10 A | 10 A | 10 A |
| On-Resistance (typ) | 3.9 mOhm | 3.9 mOhm | 3.9 mOhm |
| Input Voltage Range | 0.6 V to 5.5 V | 0.6 V to 5.5 V | 0.6 V to 5.5 V |
| Power Good Output | Yes | Yes | Yes |
| Quick Output Discharge | Yes (optional) | Yes (optional) | Different QOD pin configuration - verify before swap |
| Packing | Tape & Reel (3000) | Tape & Reel (smaller quantity) | Tape & Reel |
주요 차별점
- Ultra-low 3.9 mOhm on-resistance (vs TPS22990NDMLR)
- 10 A capability in a tiny 3x2 mm footprint (vs TPS22990DMLT)
- Adjustable inrush control plus power-good (vs TPS22990NDMLR)
설계 노트
Estimated: at 10 A continuous load, conduction loss is I^2 x R = 100 x 0.0039 = 0.39 W. The 3x2 mm WSON package relies almost entirely on the exposed pad for heat removal. Solder the pad to a copper pour with an array of thermal vias (at least a 4x4 grid, 0.3 mm drill) connecting to internal ground planes. Without adequate copper, a 0.39 W dissipation can push the junction well above the +105 C maximum operating rating in warm enclosures.
At 10 A, PCB trace resistance dominates the total path resistance beyond the switch itself. Use wide power pours (rule of thumb: at least 1 mm of trace width per 2 A for 1 oz copper, more with 0.5 oz inner layers) and multiple stitching vias when the power path changes layers. Keep the input and output loops short and place a low-ESR input capacitor close to VIN to handle inrush transients during the CT-controlled turn-on ramp.
Do not exceed the 5.5 V absolute input rating - 5 V rails with transients need TVS protection upstream. The CT pin sets slew rate: size it against Iinrush = Cload x dV/dt for your output capacitance; leaving CT as a no-connect is acceptable when slew control is not needed (confirmed on TI's E2E forum). When considering the TPS22990N variant as a substitute, verify the QOD pin connection against the datasheet pin-configuration table, as the family variants implement output discharge differently.
Use the integrated power-good (PG) output for sequencing rather than polling the output with an external comparator - it avoids extra parts and reacts directly to the internal switch state. For multi-rail systems, chain PG of one switch to the ON pin of the next stage, and stagger CT capacitor values so heavily loaded rails ramp last. This pattern is consistent with the typical application circuits in the TI TPS22990 datasheet.
규정 준수 정보
Listed as RoHS & Green compliant per DigiKey/PartGenie distributor data. REACH and conflict minerals status not stated in provided data - consult TI product page certificates.
