Texas Instruments TPS22970YZPT

Overview

TPS22970YZPT from Texas Instruments is a single-channel 4-A load switch IC with integrated N-channel MOSFET, controlled slew-rate turn-on, and quick output discharge (QOD). It operates from 0.65 V to 3.6 V input, delivers 4.7 mΩ typical on-resistance at ≥1.8 V VIN, supports ≤0.9 V logic-enable threshold, and features thermal shutdown - used in power rail sequencing for portable computing and telecom infrastructure.

For engineers reviewing the TPS22970YZPT datasheet, TPS22970YZPT pinout, TPS22970YZPT application, or TPS22970YZPT equivalent, this page delivers verified electrical specs, thermal behavior across temperature, QOD resistor value, turn-on timing vs. input voltage, and validated alternative load switches for low-voltage, high-current switching in space-constrained designs.

Technical Context

The TPS22970YZPT integrates an internal charge pump to fully enhance the NMOS pass FET across its full 0.65–3.6 V input range, enabling consistent low R_ON without external gate drive. Its slew-rate control is implemented via internal analog circuitry - not programmable - delivering fixed t_ON of 1530 µs at 3.6 V and 815 µs at 0.65 V under standard test conditions (C_L = 0.1 µF, R_L = 10 Ω).

Thermal shutdown activates at 170°C junction temperature with 30°C hysteresis, and the 150-Ω QOD resistor connects automatically when the ON pin is deasserted, discharging VOUT to GND without requiring external components. The device draws only 30 µA quiescent current when enabled and 1 µA in shutdown above 1.8 V VIN.

Key Specifications

Pinout & Package

TPS22970YZPT uses an 8-pin DSBGA (WCSP) package measuring 1.90 mm × 0.90 mm with 0.5-mm ball pitch. The package is marked "1CNI" and rated MSL Level-1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22970YZPT, the TPS22975YZPR trades thermal shutdown and 4-A capacity for lower cost and smaller die size, while the TPS22965DSGR sacrifices WCSP miniaturization for adjustable slew-rate control - making TPS22970YZPT optimal for fixed-timing, thermally constrained, ultra-compact 4-A switching.

Availability

TPS22970YZPT is available at Aetrix Electronics and suitable for notebook, industrial PC, and telecom infrastructure applications requiring stable component supply, high reliability under thermal stress, and ultra-small packaging for dense PCB layouts.

Supply support for TPS22970YZPT 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies with over 90 years of innovation history.

The TPS22970YZPT belongs to TI's NanoFree™ load switch product line, engineered specifically for space-constrained, low-voltage, high-current power gating in portable and infrastructure equipment where thermal resilience and minimal BOM count are critical.

FAQ

What is the maximum continuous current rating for the TPS22970YZPT?

The TPS22970YZPT is rated for 4 A maximum continuous switch current under recommended operating conditions. This rating assumes proper PCB thermal design - including adequate copper pour and vias - to maintain junction temperature below 125°C. At 4 A and 4.7 mΩ R_ON, power dissipation is ~75 mW, requiring ≤130°C/W thermal resistance to ambient per datasheet specifications.

Does the TPS22970YZPT include thermal shutdown protection?

Yes, the TPS22970YZPT includes integrated thermal shutdown that disables the switch when junction temperature exceeds 170°C, with 30°C hysteresis (re-enabling at ~140°C). This protection is internal and automatic - no external components or configuration are needed. The shutdown behavior is documented in Section 6.5 of the SLVSDF2A datasheet.

What is the purpose and value of the Quick Output Discharge (QOD) feature in the TPS22970YZPT?

The QOD feature in the TPS22970YZPT connects a 150-Ω internal resistor between VOUT and GND when the switch is disabled, ensuring rapid discharge of output capacitance. This prevents floating supply states that could cause undefined logic levels or unintended wake-up in downstream circuits. Measured performance shows VOUT discharges to <10% of VIN within ~1 ms into typical 100–1000 µF loads.

Can the TPS22970YZPT operate with a 0.8-V input supply?

Yes, the TPS22970YZPT supports input voltages as low as 0.65 V, making it compatible with 0.8-V rails. At 0.8 V, R_ON increases to ~5.5 mΩ (interpolated from 0.65 V and 1.05 V data points), and t_ON falls between 815 µs (0.65 V) and 1170 µs (1.8 V). Full functionality - including enable threshold and QOD - remains valid across the entire 0.65–3.6 V range.

What package type and dimensions does the TPS22970YZPT use?

The TPS22970YZPT uses an 8-pin DSBGA (Die Size Ball Grid Array) package designated YZP, with nominal body size 1.90 mm × 0.90 mm and 0.5-mm ball pitch. It features NanoFree™ construction - no leadframe - and is marked "1CNI". The package is MSL Level-1 rated and compatible with standard Pb-free reflow profiles up to 260°C peak.