Texas Instruments TPS22999YCHR

Overview

TPS22999YCHR from Texas Instruments is a single-channel N-channel load switch IC designed for low-voltage, high-speed power sequencing in space-constrained systems. It delivers 1.5-A continuous current with 7.5-mΩ typical on-resistance, regulated inrush current (1.33-A max), fast turn-on time (<200 μs at 1.0 V VIN), and integrated quick output discharge (5.3-Ω typical). It serves as a controlled power gate in wearables, SSDs, and optical modules.

For engineers reviewing the TPS22999YCHR datasheet, TPS22999YCHR pinout, TPS22999YCHR application, or TPS22999YCHR equivalent, key selection criteria include its 0.1–4.5-V input range, 2.3–5.5-V bias supply requirement, open-drain Power-Good signaling, thermal shutdown behavior, and DSBGA-8 (YCH) package compatibility with fine-pitch PCB layouts.

Technical Context

The TPS22999YCHR integrates a charge-pump–driven N-channel MOSFET to enable operation down to 0.1 V VIN while maintaining low RON across input voltages from 0.5 V to 4.5 V. Its regulated inrush control actively limits peak current during VOUT ramp-up, decoupling turn-on speed from output capacitance size.

Control logic includes smart EN pulldown (500-kΩ typical) for GPIO-compatible enable sequencing, UVLO on VBIAS (1.85-V nominal threshold), and thermal shutdown latching at 131°C (typical). The PG signal asserts low only after MOSFET enhancement completes, confirming stable RON before downstream load activation.

Key Specifications

Pinout & Package

The TPS22999YCHR is housed in an 8-pin DSBGA (Die Size Ball Grid Array) package designated YCH, measuring 1.4 mm × 0.7 mm with 0.35-mm pitch. This wafer-level chip-scale package supports high-density routing and thermal performance via bottom-side solder balls.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar load switch applications.

Compared with TPS22975YFPR and TPS22965DSGR, the TPS22999YCHR uniquely combines regulated inrush, sub-200-μs turn-on at 1-V VIN, and PG confirmation in a 1.4×0.7-mm DSBGA - making it optimal for high-reliability, space-constrained, low-voltage sequencing where rail stability must be verified before load activation.

Availability

TPS22999YCHR is available at Aetrix Electronics and suitable for wearables, solid-state drives, and optical modules requiring stable component supply, consistent parametric performance across temperature, and long-term production continuity.

Supply support for TPS22999YCHR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability, thermally robust IC design.

The TPS22999YCHR belongs to TI's ultra-low-RON, fast-turn-on load switch product line - engineered specifically for power integrity in miniaturized, battery-powered, and thermally demanding applications such as portable medical devices and high-speed interconnect modules.

FAQ

What is the minimum input voltage supported by the TPS22999YCHR?

The TPS22999YCHR supports an input voltage range from 0.1 V to 4.5 V. At 0.1 V VIN, the device remains functional with specified RON and inrush regulation, enabling use in emerging ultra-low-voltage logic domains and energy-harvesting systems. Performance parameters such as turn-on time and RON are characterized down to 0.5 V VIN per the datasheet.

Does the TPS22999YCHR require an external pullup resistor on the PG pin?

Yes, the TPS22999YCHR PG pin is an open-drain output and requires an external pullup resistor to a valid voltage source (e.g., VOUT or another system rail). A typical value is 10 kΩ. Without this pullup, the PG signal cannot assert high-Z or low states correctly, and the power-good status cannot be read by monitoring circuitry.

How does the regulated inrush current function in the TPS22999YCHR?

The TPS22999YCHR regulates inrush current to a maximum of 1.33 A (typical 1.0 A) during turn-on, independent of output capacitance size. This is achieved via internal current-sensing and gate-drive control, preventing input rail collapse and ensuring stable power-up of large capacitive loads like SSDs or optical modules without external components.

What is the purpose of the VBIAS pin on the TPS22999YCHR?

The VBIAS pin supplies the internal charge pump that drives the N-channel MOSFET gate. It must be biased between 2.3 V and 5.5 V and decoupled with a 0.1-μF capacitor to GND. VBIAS enables low-RON operation even at sub-1-V VIN levels and powers the PG output driver - PG is invalid if VBIAS is absent or below UVLO threshold.

Can the TPS22999YCHR operate without the VBIAS supply?

No, the TPS22999YCHR cannot operate without VBIAS. The internal charge pump relies on VBIAS to generate sufficient gate voltage for the N-channel MOSFET. If VBIAS is missing, below 2.3 V, or disconnected, the device remains in UVLO lockout, the MOSFET stays off, and PG is high-impedance - even if EN is asserted and VIN is present.