TPS2291L02BYCJR - 2A 22mΩ Load Switch | TI
MPN: TPS2291L02BYCJR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.42 | $0.42 |
| 10 | $0.36 | $3.60 |
| 100 | $0.28 | $28.00 |
| 500 | $0.22 | $110.00 |
| 1,000 | $0.18 | $180.00 |
TPS2291L02BYCJR Overview
A load switch is a power management IC that places a power MOSFET between a supply rail and its load, allowing a controller to gate power on and off electronically. In the system power hierarchy, load switches sit between the voltage regulator (or battery) and downstream loads such as sensors, radios, and processors, providing controlled power sequencing, inrush limiting, and leakage isolation. They are essential in battery-powered designs where every microamp of standby drain matters.
Key features of the TPS2291L02 include an input voltage range of 1.05V to 5.5V, a maximum continuous current of 2A, and an extremely low 90 nA quiescent current. A quick output discharge (QOD) function actively pulls the output low when the switch is disabled, preventing floating rails from back-powering the load. The controlled turn-on time limits inrush current during startup, and the enable (EN) pin interfaces directly with low-voltage control signals from MCUs and processors.
Internally, the device uses an N-channel MOSFET as the pass element, driven by an internal charge pump, which enables low RON across the full input range while keeping the die tiny enough for a 0.62 mm square DSBGA footprint. This makes it suitable for space-constrained portable designs.
Typical applications include smartphone and tablet peripheral rail switching, battery-powered IoT sensor power gating, camera module power control, and power sequencing in multi-rail processor systems where module power-up order must be enforced.
When designing with this part, remember that DSBGA packages require careful PCB layout: lands must be non-solder-mask-defined per TI recommendation, and inspection is best done with X-ray. Also budget for the switch's RON-related drop at 2A continuous load.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for TPS2291L02BYCJR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS2291L02BYCHR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS2291L02BYCJR Maximum Ratings & Electrical Characteristics
| Input Voltage Range | 1.05 V to 5.5 V |
| Maximum Continuous Current | 2 A |
| On-Resistance (RON) | 22 mOhm (Mouser listing cites 30 mOhm) |
| Quiescent Current (IQ) | 90 nA |
| Switch Type | N-Channel MOSFET, High Side |
| Control Interface | EN pin, compatible with low-voltage control signals |
| Quick Output Discharge (QOD) | Yes |
| Controlled Turn-On Time | Yes (inrush limiting) |
| Package | 4-DSBGA (0.62 mm x 0.62 mm) |
| Mounting Type | Surface Mount |
| Configuration | 1:1 switch |
| Product Type | Load Switch / Power Distribution Switch |
TPS2291L02BYCJR 4-dsbga (0.62 mm x 0.62 mm) Pin Configuration Guide
Pin configuration for TPS2291L02BYCJR (4-dsbga (0.62 mm x 0.62 mm) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for TPS2291L02BYCJR.
Refer to the datasheet for full pin configuration.
Typical Applications
TPS2291L02BYCJR is suitable for 6 applications: Smartphone Peripheral Rail Switching, Battery-Powered IoT Sensor Power Gating, Multi-Rail Power Sequencing for Processors, Camera Module Power Control, Wearable and Hearable Load Switching, Industrial Module Power Gating.
Smartphone Peripheral Rail Switching
The TPS2291L02BYCJR is well suited to switching camera modules, sensor hubs, and RF front-end rails in smartphones because its 0.62 mm x 0.62 mm 4-DSBGA package occupies almost no board area, while the 2A rating covers the peak inrush of camera and RF blocks. The 90 nA quiescent current keeps the switch invisible to the phone's power budget, and the quick output discharge guarantees that a camera module powered down between shots is fully de-energized before re-enable. The controlled turn-on time limits inrush into large downstream capacitance, avoiding upstream rail droop. With an input range of 1.05V to 5.5V, one part can switch 1.8V sensor rails and 5V flash-charger feeds alike.
Recommended
Battery-Powered IoT Sensor Power Gating
In duty-cycled IoT sensor nodes, the TPS2291L02BYCJR lets an MCU completely de-energize radios, MEMS sensors, and flash between measurements. Its 90 nA quiescent current means the switch itself contributes negligible drain, and the 1.05V minimum input allows direct switching of single-cell battery or boost-converter outputs. The quick output discharge function prevents partially charged downstream capacitors from back-powering a sleeping radio through its ESD diodes, which is a common source of unexpected sleep-mode current. The controlled turn-on ramps the rail slowly enough to avoid inrush-triggered brownouts of the boost converter when a 2A-class load such as a cellular module powers up.
Recommended
Multi-Rail Power Sequencing for Processors
Processors, FPGAs, and SoCs require core, I/O, and analog rails to power up in a defined order. The TPS2291L02BYCJR acts as a sequencing element: an supervisor or GPIO asserts the EN pin in the required order, and the switch's controlled turn-on produces a monotonic, inrush-limited ramp. The quick output discharge then guarantees a clean 0V state on disable, so downstream hot-swap cycles start from a known condition. With 2A continuous capability and only 22 mOhm (nominal) of series resistance, voltage droop stays within a few tens of millivolts at high current, keeping rails within tolerance during sequencing windows.
Recommended
Camera Module Power Control
Camera modules typically need their analog, digital, and I/O supplies gated independently for standby and privacy-shutter modes. The TPS2291L02BYCJR, with its 1.05V to 5.5V input range and EN pin compatible with low-voltage control signals, can switch each rail directly from the image-sensor ISP's GPIOs without level translation. The 2A rating handles AF actuator and flash inrush, the 90 nA IQ keeps standby drain minimal, and quick output discharge ensures the sensor power-down sequence completes fully before re-enable, preventing the I2C bus latch-up conditions that floating rails commonly cause in multi-camera designs.
Recommended
Wearable and Hearable Load Switching
Wearables demand the smallest possible solution size, and the 4-DSBGA (0.62 mm x 0.62 mm) package of the TPS2291L02BYCJR is among the smallest 2A-class switch footprints available. The 90 nA quiescent current preserves multi-day battery life in always-on devices, while the 1.05V minimum input supports switching directly off a single lithium-cell regulated rail or even a low-voltage energy-harvesting output. The EN pin draws control signals from low-voltage PMIC GPIOs without extra level shifting, and quick output discharge cleanly isolates the display, sensor, or BLE radio subsystem when the wearable enters its sleep state between activity events.
Recommended
Industrial Module Power Gating
Industrial sensor transmitters and field instruments use the TPS2291L02BYCJR to gate power to high-drain blocks such as 4-20 mA interfaces, wireless modules, and heaters, switching them on only when a measurement or transmission is scheduled. The 5.5V maximum input covers standard 5V and 3.3V instrument rails, and the 2A continuous rating accommodates the transmit burst of industrial RF modules. Controlled turn-on prevents inrush from tripping upstream current limits, and the quick output discharge provides a defined reset state for field-recoverable module hangs. Its small DSBGA footprint also fits the densely packed analog front ends typical of loop-powered instruments.
Recommended
Recommended Products Summary
Engineering reference data for TPS2291L02BYCJR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS2291L02BYCHR |
|---|---|---|
| Package | 4-DSBGA (0.62x0.62) | 4-DSBGA (0.62x0.62) - same |
| Brand | Texas Instruments | Texas Instruments |
| Input Voltage Range | 1.05 V to 5.5 V | 1.05 V to 5.5 V |
| Max Continuous Current | 2 A | 2 A |
| Quiescent Current | 90 nA | 90 nA |
| Quick Output Discharge | Yes | Yes |
| Controlled Turn-On | Yes | Yes |
Key Differentiators
- Ultra-low 90 nA quiescent current (vs TPS2291L02BYCHR)
- Smallest 2A-class footprint (vs TPS2291L02BYCHR)
- Integrated quick output discharge and controlled turn-on (vs TPS2291L02BYCHR)
Design Notes
The 4-ball DSBGA (0.62 mm x 0.62 mm) package demands wafer-level layout discipline. Use non-solder-mask-defined (NSMD) lands per TI's DSBGA application guidance, keep traces between the lands short and wide for the 2A current path, and place at least 4.7 uF ceramic capacitance on both input and output as close to the balls as possible. Reflow profiles must be tightly controlled, and post-reflow inspection should use X-ray since solder voids under the balls are not optically visible.
Estimated: with 22 mOhm RON at 2A continuous, conduction loss is I^2 x R = 4 x 0.022 = 88 mW, which a small copper pour can handle. However, if the worst-case 30 mOhm listing value applies, dissipation rises to about 120 mW through a sub-square-millimeter die, so maximize local copper area and consider thermal vias near the lands. Keep in mind RON increases with junction temperature, so verify the switch drop at your highest ambient condition rather than room temperature only.
Do not exceed the 5.5V absolute input rating - 5V rails with tolerances can approach this limit, so check the upstream regulator accuracy. Verify enable polarity and threshold against the datasheet electrical characteristics before interfacing with a 1.2V-domain GPIO; the EN pin is designed for low-voltage control signals, but the exact VIH/VIL must come from the datasheet table. Also confirm the quick output discharge pulldown resistance is acceptable for your re-enable timing, as large output capacitors take time to discharge through QOD.
Compliance Information
Compliance details were not present in the provided web data; consult the TI product page quality section for TPS2291L02BYCJR certification status.
