TPS22919-Q1 - 5.5V 1.5A Load Switch SC-70-6 | Texas Instruments
料号： TPS22919-Q1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.62 | $0.62 |
| 10 | $0.51 | $5.10 |
| 100 | $0.39 | $39.00 |
| 500 | $0.33 | $165.00 |
| 1,000 | $0.28 | $280.00 |
TPS22919-Q1 概述
A load switch is a power management IC that acts as an electronic switch between a power rail and its load, enabling or disabling power delivery under logic control. Load switches sit within the power distribution and protection hierarchy of a system, complementing voltage regulators, e-fuses, and hot-swap controllers. They are used to sequence rails, reduce leakage in standby, and isolate faults downstream.
Key differentiating features of the TPS22919-Q1 include controlled output slew rate for inrush-current limiting during turn-on, adjustable quick output discharge (QOD) that pulls the output low when the switch is off, and integrated self-protection including short-circuit current limiting. According to TI, the device is qualified for automotive applications under AEC-Q100 device temperature grade 1.
The internal N-channel MOSFET pass element gives a low, well-controlled on-resistance of 90 mOhm, which limits voltage drop: at 1 A the drop is roughly 90 mV, dissipating about 90 mW. The controlled slew rate soft-starts capacitive loads, avoiding the large inrush spikes that can sag upstream rails or trip protection circuits. The QOD function is adjustable via an external resistor, letting designers trade discharge speed against pull-down current.
Typical applications include automotive camera and sensor modules, infotainment power distribution, peripheral-rail switching in ADAS domains, and portable or industrial designs needing fault-isolated power gating. The wide 1.6 V to 5.5 V input range covers 1.8 V, 3.3 V, and 5 V rails in one footprint.
For design, account for the Rds(on) power loss at high current, ensure the ON-pin logic threshold matches the controlling GPIO, and size the QOD resistor for the required discharge time. Do not rely on the switch to regulate voltage - it only gates the rail.
This page synthesizes distributor availability data, drop-in alternatives, and practical design guidance not found in the manufacturer datasheet.
直接替换替代料： TPS22919-Q1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
TPS22919QDCKR
✅ 直接替换📋 参考替代料（不在目录中）
TPS22917-Q1
✅ 直接替换📋 参考替代料（不在目录中）
TPS22918-Q1
✅ 直接替换📋 参考替代料（不在目录中）
TPS22991
✅ 直接替换📋 参考替代料（不在目录中）
ET3168
✅ 直接替换📋 参考替代料（不在目录中）
TPS22919-Q1 最大额定值与电气特性
| Product Type | Single-channel load switch with controlled slew rate |
| Pass Element | N-channel MOSFET, high side |
| 输入电压范围 | 1.6 V to 5.5 V |
| Maximum Continuous Current | 1.5 A |
| On-Resistance | 90 mOhm |
| Output Discharge | Adjustable quick output discharge (QOD) |
| Slew Rate Control | Controlled (integrated soft-start) |
| Protection | Self-protected, short-circuit current limiting |
| Automotive Qualification | AEC-Q100 qualified, device temperature grade 1 |
| 封装 | SC-70-6 (DCK) |
| 安装类型 | Surface Mount |
| 通道数 | 1 |
| Switch Type | High-side power switch |
| RoHS 状态 | Compliant |
| 引脚数 | 6 |
TPS22919-Q1 sc-70-6 (dck) 引脚配置指南
TPS22919-Q1（sc-70-6 (dck) 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： TPS22919-Q1.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TPS22919-Q1 适用于 6 应用s: Automotive Camera Module Power Switching, ADAS Domain Controller Peripheral Rail Gating, Infotainment Display and Audio Rail Switching, Battery-Powered Portable Device Power Gating, Industrial Module and Peripheral Hot-Switching, Infotainment and Telematics Sensor Power Sequencing.
Automotive Camera Module Power Switching
The TPS22919-Q1 fits automotive camera module power switching because its AEC-Q100 grade 1 qualification and 1.6 V to 5.5 V input range cover the 3.3 V and 5 V rails typical of camera sensor and serializer supplies, while the 1.5 A rating handles sensor plus image-processor current with margin. The controlled slew rate limits inrush when the module's bulk capacitance charges at turn-on, preventing sag on the shared harness rail that could reset other nodes. Its integrated short-circuit protection isolates a faulted camera from the rest of the network, and the adjustable quick output discharge (QOD) pulls the module rail low when switched off, ensuring a clean reset on the next enable cycle. Place the switch near the module connector with a 1 uF input and 1 uF output ceramic capacitor per the datasheet typical application.
推荐
ADAS Domain Controller Peripheral Rail Gating
In ADAS domain controllers, numerous peripheral rails (radar, lidar, Ethernet PHY, sensor hubs) must be independently switched for power sequencing and fault isolation. The TPS22919-Q1 provides a compact SC-70-6 high-side switch with 90 mOhm on-resistance, so at 1 A the drop is only about 90 mV and dissipation around 90 mW - manageable without copper pours or heatsinking. The controlled slew rate staggers inrush across multiple switches on shared rails, and the ON pin interfaces directly with microcontroller GPIOs to implement sequencing. Short-circuit protection prevents a single failed peripheral from dragging down the domain supply. With a 1.5 A continuous rating and AEC-Q100 grade 1 qualification, one footprint covers 1.8 V, 3.3 V, and 5 V peripheral rails across the vehicle's wide supply conditions.
推荐
Infotainment Display and Audio Rail Switching
Automotive infotainment head units switch display, tuner, and audio amplifier rails selectively to meet standby current budgets. The TPS22919-Q1 suits this because the adjustable quick output discharge actively pulls switched rails to ground on disable, preventing audio pops or ghost display content from floating rails, while leakage is eliminated by fully disconnecting the load. Its 5.5 V maximum input covers post-regulator 5 V rails, and the controlled slew rate avoids audible transients and connector sparking at enable. At a 1 A display-backlight controller load, the 90 mOhm switch dissipates about 90 mW. AEC-Q100 grade 1 qualification addresses the elevated ambient temperatures behind the dashboard. Per the datasheet application section, a 10 uF output capacitor with the QOD resistor sized for sub-100 ms discharge gives clean rail collapse.
推荐
Battery-Powered Portable Device Power Gating
In battery-powered instruments and IoT devices, the TPS22919-Q1 gates power to sensors, radios, or memory banks so idle blocks draw zero current instead of microamp-level quiescent drain. The 1.6 V minimum input supports direct switching from single-cell lithium or two-cell alkaline rails, and the 1.5 A capacity covers radio transmit bursts. The controlled slew rate prevents inrush droop that would brown-out the main regulator when large capacitive loads enable, and the adjustable QOD ensures a defined reset state. The 90 mOhm on-resistance keeps conduction loss low: at 200 mA the drop is 18 mV, negligible for accuracy-critical analog loads. Although the -Q1 suffix targets automotive, the same die is available as the commercial TPS22919 for cost-optimized consumer builds.
推荐
Industrial Module and Peripheral Hot-Switching
Industrial controllers frequently hot-switch module power - IO cards, sensor front ends, fieldbus transceivers - without cycling the backplane supply. The TPS22919-Q1's controlled slew rate ramps the output gently into a module's input capacitance, keeping inrush below upstream breaker or e-fuse thresholds, and its integrated short-circuit protection immediately limits current if a module fails short, protecting connectors and traces. The 1.6 V to 5.5 V range and 1.5 A rating suit 3.3 V and 5 V logic supplies on standard industrial boards, and the SC-70-6 footprint conserves PCB area in dense IO racks. Use the QOD function to guarantee modules see a clean power-down between enable cycles, and consult the datasheet thermal application section when switching loads near the 1.5 A maximum.
推荐
Infotainment and Telematics Sensor Power Sequencing
Telematics units combine GNSS receivers, cellular modems, and IMU sensors whose datasheets mandate strict power-up ordering. The TPS22919-Q1 implements per-rail sequencing economically: each SC-70-6 switch is driven by a GPIO from the host MCU, and the controlled slew rate ensures that when multiple switches turn on nearly simultaneously, combined inrush does not collapse the intermediate DC bus. The short-circuit protection characteristic limits fault current to a safe level if one sensor fails, letting the system log and isolate the fault while remaining operational. With a 1.5 A capacity and 90 mOhm resistance, the same part covers both 3.3 V sensor rails and higher-current 5 V modem PA assist rails, reducing BOM diversity. AEC-Q100 grade 1 qualification suits under-hood telematics boxes.
推荐
推荐产品汇总
工程参考数据： TPS22919-Q1 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TPS22919QDCKR | TPS22917-Q1 | TPS22918-Q1 | TPS22991 | ET3168 |
|---|---|---|---|---|---|---|
| Package | SC-70-6 (DCK) | SC-70-6 (DCK) - same | SC-70-6 (DCK) - same | SC-70-6 (DCK) - same | SC-70-6 (DCK) - same | SC-70-6 (DCK) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | 3PEAK / ETEK |
| AEC-Q100 Qualification | Yes (Grade 1) | No (commercial grade) | Yes (-Q1) | Yes (-Q1) | No | Not verified |
关键差异点
- Integrated short-circuit self-protection （对比 TPS22918-Q1)
- AEC-Q100 Grade 1 automotive qualification （对比 TPS22919QDCKR)
- Controlled slew rate limits inrush （对比 ET3168)
- Adjustable quick output discharge (QOD) （对比 TPS22991)
设计说明
Estimated: with 90 mOhm on-resistance, a continuous 1.5 A load dissipates I^2 x R = 1.5^2 x 0.09 = about 0.20 W in the SC-70-6 package, giving roughly a 50 C junction rise at typical theta_JA near 250 C/W for this small SMD package. For designs running sustained currents above roughly 1 A, verify junction temperature against your board's copper area, and consider spreading the load across two switches or choosing a lower-Ron family member (TI forum threads suggest TPS22950-class parts for lower on-resistance).
Place the input capacitor (1 uF ceramic) within 2-3 mm of the VIN pin and the output capacitor close to VOUT to minimize parasitic inductance during the QOD discharge event - a long discharge path can leave residual rail voltage. Keep the QOD resistor trace short to ground. The ON pin can be driven directly by a logic GPIO, but if the controlling rail is above 5.5 V add a divider. Use the datasheet typical application layout as the reference; the SC-70-6 footprint is thermally limited, so 2 oz copper or short thermal spokes help at high current.
Do not substitute the commercial TPS22919 for the -Q1 in automotive designs - the silicon is identical, but AEC-Q100 grade 1 qualification and traceability differ, which matters for PPAP and customer audits. Conversely, TI's E2E forum confirms no pin-to-pin competitor device preserves the short-circuit protection; if your BOM cross drops to TPS22918-Q1, you lose current limiting and must provide it elsewhere (e-fuse or PTC). Finally, the switch does not regulate voltage - never size the input assuming the TPS22919-Q1 will clean up a dirty rail.
The controlled slew rate converts output capacitance into a defined inrush (I = C x dV/dt), so oversizing the output capacitor directly increases turn-on time and inrush. Estimate the ramp: a 22 uF output with the datasheet's typical slew time yields tens of milliamps of inrush - acceptable on most rails. Keep high-current VIN/VOUT traces at least 0.3 mm wide per amp of current, and place the QOD resistor so its discharge current return path does not share ground routing with sensitive analog grounds.
合规信息
AEC-Q100 qualified at device temperature grade 1 per the TI datasheet. RoHS/lead-free status inferred from standard TI catalog flows for active parts; REACH and halogen-free status not stated in provided data.
