Toshiba Semiconductor and Storage TCK22910G,LF

Overview

TCK22910G,LF from Toshiba Electronic Devices & Storage Corporation is a 2 A load switch IC with true reverse current blocking, active-low control, and thermal shutdown-designed for power rail sequencing in space-constrained portable electronics. It delivers 31 mΩ typical R_ON at 5.0 V input, 11 μA quiescent current in ON state, and operates across 1.1–5.5 V input range.

For engineers reviewing the TCK22910G,LF datasheet, TCK22910G,LF pinout, TCK22910G,LF application, or TCK22910G,LF equivalent, key selection criteria include its ultra-low standby current (0.6 μA), built-in UVLO with 0.82 V rising threshold, absence of output auto-discharge, and WCSP6E package compatibility with high-density PCB layouts.

Technical Context

The TCK22910G,LF integrates a low-R_ON N-channel MOSFET power switch with true reverse current blocking (TRCB) circuitry that actively blocks reverse conduction regardless of switch state. Its active-low control logic enables direct interfacing with open-drain or push-pull microcontroller GPIOs without external pull-down resistors.

Thermal shutdown activates at ~170°C junction temperature with 20°C hysteresis, while under-voltage lockout (UVLO) disables the switch when VIN falls below 0.82 V (rising) or 0.77 V (falling). The device lacks output auto-discharge and internal control-to-GND pull-down-distinguishing it from TCK22911G/TCK22913G variants.

Key Specifications

Pinout & Package

Supplied in ultra-compact WCSP6E package (0.8 mm × 1.2 mm, 0.55 mm height, 1 mg weight) with 0.4 mm pitch-optimized for smartphone camera modules and wearable sensor hubs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCK22910G,LF, the TPS22916BYFPR offers lower standby current but mandates control inversion and adds discharge timing complexity, while the AP22653AW5-7 sacrifices reverse blocking and UVLO for lower unit cost-making TCK22910G,LF optimal for compact, safety-critical portable power domains.

Availability

TCK22910G,LF is available at Aetrix Electronics and suitable for smartphone camera modules, wireless earbud charging cases, portable ECG patches, BLE beacon sensor nodes, and other high-density portable electronics requiring stable component supply with guaranteed long-term availability.

Supply support for TCK22910G,LF 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

Toshiba Electronic Devices & Storage Corporation designs high-reliability semiconductor components for automotive, industrial, and consumer applications-with emphasis on power efficiency, miniaturization, and functional safety.

The TCK2291xG series targets ultra-compact portable electronics requiring precise power rail control, true reverse current isolation, and minimal quiescent consumption-addressing design constraints in smartphones, wearables, and medical patches.

FAQ

What is the control logic polarity of the TCK22910G,LF?

The TCK22910G,LF uses active-low control logic: the internal power switch turns ON when the Control pin voltage is below 0.4 V (V_IL), and turns OFF when above 1.0 V (V_IH). Unlike TCK22912G/TCK22913G, it has no internal pull-down resistor-so the Control pin must be actively driven or externally pulled low to ensure reliable OFF-state behavior. This characteristic is explicitly confirmed in the Function Table for TCK22910G,LF.

Does the TCK22910G,LF provide output auto-discharge functionality?

No, the TCK22910G,LF does not include output auto-discharge. Per the Function Table, "Output auto-discharge" is marked "N/A" for TCK22910G,LF-distinguishing it from TCK22911G and TCK22913G variants. When the switch turns OFF, VOUT remains floating unless an external discharge path (e.g., resistor or FET) is added. This omission simplifies timing control in applications requiring hold-up voltage retention, such as memory backup rails.

What is the maximum continuous output current rating for the TCK22910G,LF?

The TCK22910G,LF supports 2.0 A DC continuous output current, as specified in the Absolute Maximum Ratings table under "Output current (DC)". This rating assumes proper PCB thermal design per Toshiba's recommended glass-epoxy board layout (40 mm × 40 mm, 50% copper coverage). Pulse current up to 3.0 A is allowed for ≤100 μs at 2% duty cycle-suitable for short-duration motor or flash LED loads.

How does the true reverse current blocking (TRCB) function operate in the TCK22910G,LF?

The TCK22910G,LF implements true reverse current blocking via dedicated circuitry that actively monitors VOUT–VIN differential voltage. When VOUT exceeds VIN by more than 35 mV (VRB threshold), the TRCB circuit engages-blocking conduction regardless of the main switch's ON/OFF state. This full-time protection eliminates reliance on body diode behavior and prevents backfeed in multi-source systems, such as USB OTG configurations where VOUT may be powered externally while VIN is inactive.

What package type and dimensions does the TCK22910G,LF use?

The TCK22910G,LF is housed in the WCSP6E wafer-level chip-scale package: 0.8 mm × 1.2 mm footprint, 0.55 mm height, and 0.4 mm pin pitch. Its land pattern and mechanical drawings are documented in Toshiba's Package Dimension drawing (TCK2291xG, page 13–14). This ultra-small form factor enables placement beneath camera modules or within <5 mm² wearable PCB areas-verified by Toshiba's stated target application: cellular phone high-density assembly.