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Toshiba Semiconductor and Storage TCK321G,LF
- Part No.:
- TCK321G,LF
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package:
- 16-UFBGA, CSPBGA
- Datasheet:
-
TCK321G,LF.pdf
- Description:
- IC PWR SWITCH N-CHAN 2:1 16WCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,410
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Product details
Overview
TCK321G,LF from Toshiba is a 36 V dual-input single-output power multiplexer IC with overvoltage protection, designed for battery charge path selection in portable electronics. It delivers 2.0 A DC output per channel, features 98 mΩ typical ON resistance at 4.5 V/−1.0 A, supports 2.3–36 V input range, and integrates reverse current blocking, thermal shutdown, and flag signaling.
For engineers reviewing the TCK321G,LF datasheet, TCK321G,LF pinout, TCK321G,LF application, or TCK321G,LF equivalent, key selection criteria include its 12.0 V (typ.) OVLO threshold per input, auto/manual selection modes, break-before-make switching, and WCSP16C package suitability for high-density mobile PCB layouts.
Technical Context
The TCK321G,LF implements dual N-channel MOSFET power switches (Q1/Q2) controlled by internal logic that enforces break-before-make timing (15 ms typical) to prevent shoot-through. Its charge pump drives gate voltages above VIN to ensure low RON across the full 2.3–36 V input range.
OVLO is independently applied to both VINA and VINB at 12.0 V (typ.), with hysteresis (−0.5 V falling threshold); UVLO activates at 2.9 V (typ.). The open-drain FLAG pin asserts low when either input exceeds OVLO or falls below UVLO, enabling system-level fault monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3 V to 36 V - supports wide-range power sources including USB PD, adapters, and Li-ion batteries. |
| Max Output Current | 2.0 A DC per channel - sufficient for main system rail switching in smartphones and wearables. |
| ON Resistance | 98 mΩ (typ.) at VIN = 4.5 V, −1.0 A - minimizes conduction loss and thermal rise under load. |
| OVLO Threshold | 12.0 V (typ.) on both VINA and VINB - protects downstream circuitry from overvoltage transients. |
| Package | WCSP16C (1.9 mm × 1.9 mm, 0.5 mm pitch) - enables ultra-compact placement in space-constrained mobile designs. |
| Thermal Shutdown | Active at TJ ≥ 150°C - prevents permanent damage during sustained overload or poor heatsinking. |
| Reverse Current Blocking | Enabled in SW OFF state - eliminates backfeed from VOUT to disabled input rails. |
Pinout & Package
Delivered in a 0.5 mm pitch wafer-level chip-scale package (WCSP16C), the TCK321G,LF uses bottom-side solder bumps for mounting. The package measures 1.9 mm × 1.9 mm × 0.5 mm (typ.) and weighs 3.9 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | FLAG | Open-drain fault indicator - pulled low during OVLO/UVLO events; requires external pull-up. |
| A2 | VSEL | Selection mode control - low = manual mode, high = auto mode with VINA priority. |
| A3 | CNT | Mode enable - low = Q1/Q2 controlled by VSEL, high = VINB forced active (Q2 ON). |
| A4 | GND | Power ground reference - must be low-impedance connection to minimize noise and thermal resistance. |
| B1/C1/D1, B4/C4/D4 | VINA / VINB | Dual independent inputs - each with dedicated OVLO/UVLO comparators and reverse-blocking capability. |
| B2/C2/D2, B3/C3/D3 | VOUT | Single shared output - routed from active input via internal N-MOSFETs; supports up to 2.0 A continuous. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-selection with VINA priority | Automatically selects highest valid input (VINA first), eliminating need for external arbitration logic. |
| Inrush current reduction | Internal slew-rate control limits dV/dt at VOUT during turn-on, preventing supply rail collapse and capacitor stress. |
| Break-before-make switching | 15 ms guaranteed dead time between input disconnection and reconnection - prevents cross-conduction and short-circuit faults. |
| Flag-driven fault reporting | Single open-drain FLAG pin signals OVLO/UVLO on either input, simplifying host MCU interrupt handling. |
| Thermal shutdown with hysteresis | Shuts down at 150°C junction temperature and remains off until TJ drops ~20°C - avoids thermal cycling instability. |
Applications
| Smartphone Battery Charging | USB-C Dual-Source Power Selection |
|---|---|
Use Scenario: Selecting between wall adapter and USB OTG power while charging a smartphone battery. IC Role / Device Role / Timing Role: Dual-input power multiplexer managing charge path integrity and preventing backfeed. Use Value: Enables seamless source handover with 15 ms break-before-make timing and reverse current blocking to protect battery and USB interface. | Use Scenario: Choosing between upstream host and downstream peripheral power in USB-C alternate mode devices. IC Role / Device Role / Timing Role: Single-output load switch with auto-selection logic and OVLO monitoring on both ports. Use Value: Ensures safe 12 V tolerance on VBUS lines and prevents overvoltage damage during hot-plug events. |
| Wearable Health Monitor Power Path | Industrial Handheld Scanner Power Management |
Use Scenario: Managing power from coin-cell backup and primary Li-poly battery in compact medical wearables. IC Role / Device Role / Timing Role: Low-RON (98 mΩ) power selector minimizing voltage drop in milliamp-level systems. Use Value: Extends runtime via efficient conduction and maintains system uptime during battery swap using UVLO hysteresis (2.9 V rising). | Use Scenario: Switching between AC adapter and removable Li-ion pack in rugged handheld scanners. IC Role / Device Role / Timing Role: High-reliability power mux with thermal shutdown and FLAG fault signaling for firmware diagnostics. Use Value: Prevents field failures due to overheating or input overvoltage, with traceable fault logs via FLAG assertion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2113AIDGKR | Lower max input voltage (20 V), no integrated OVLO, 120 mΩ RON at 5 V. | Lacks built-in overvoltage protection; requires external OVLO circuitry for 12 V+ inputs. | Choose when cost sensitivity outweighs integrated protection and board space allows discrete OVLO design. |
| RT9759GJ5 | Same 36 V rating and WCSP package, but fixed 15 V OVLO (no TCK321G,LF's 12 V option) and no FLAG pin. | Missing fault reporting capability; unsuitable where system-level OVLO event logging is required. | Prefer when only basic dual-input selection is needed and fault visibility is handled externally. |
Compared with TPS2113AIDGKR and RT9759GJ5, the TCK321G,LF provides tighter OVLO matching (12.0 V typ.), integrated FLAG signaling, and lower RON - making it optimal for space-constrained, safety-critical portable charge path designs requiring autonomous fault response.
Availability
TCK321G,LF is available at Aetrix Electronics and suitable for smartphone battery charging, USB-C dual-source power selection, and wearable health monitor power path applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TCK321G,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 and manufactures high-performance analog, power, and logic ICs for consumer, industrial, and automotive markets.
The TCK321G,LF belongs to Toshiba's power multiplexer product line, engineered specifically for intelligent, compact power-path selection in battery-powered portable electronics with stringent size and protection requirements.
FAQ
What is the overvoltage lockout threshold for TCK321G,LF?
The TCK321G,LF has a 12.0 V (typical) overvoltage lockout threshold on both VINA and VINB inputs, with ±1.5 V tolerance over temperature (10.5 V to 13.5 V). This ensures reliable protection against transient overvoltages in USB-C and adapter-based power systems without requiring external clamping components. The threshold is factory-trimmed and applies independently to each input rail.
Does TCK321G,LF support automatic input selection?
Yes, the TCK321G,LF supports auto-selection mode when VSEL is pulled high. In this mode, it prioritizes VINA and automatically connects the valid input (within 2.3–36 V and within OVLO/UVLO windows) to VOUT. If both inputs are valid, VINA takes precedence. The TCK321G,LF also provides a FLAG signal to indicate selection status and fault conditions during auto-mode operation.
What is the maximum continuous output current rating of TCK321G,LF?
The TCK321G,LF is rated for 2.0 A DC output current per channel under steady-state conditions, as specified in its Absolute Maximum Ratings table. This rating assumes proper PCB thermal design (e.g., 4-layer FR4 board per Toshiba's test condition) and ambient temperatures up to +85°C. Pulse current capability reaches 3.0 A for 1 ms pulses at 1% duty cycle.
How does TCK321G,LF prevent reverse current flow?
The TCK321G,LF prevents reverse current flow by disabling the internal N-channel MOSFETs when the switch is turned off, effectively blocking conduction from VOUT back to either VINA or VINB. This reverse current blocking function is active in the SW OFF state and verified to limit IRB to ≤10 μA at 5.0 V VOUT, ensuring no backfeed into inactive power sources during system sleep or battery swap scenarios.
What package type is used for TCK321G,LF?
The TCK321G,LF is packaged in WCSP16C - a 0.5 mm pitch wafer-level chip-scale package measuring 1.9 mm × 1.9 mm × 0.5 mm (typical height) with 16 solder bumps on the bottom side. This ultra-compact package enables high-density routing in mobile phone and wearable PCBs, and its thermal performance supports 1.65 W power dissipation on a standard 4-layer FR4 board.
TCK321G,LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package/Case:
- 16-UFBGA, CSPBGA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Type:
- General Purpose
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 2:1
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 2.3V ~ 36V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 2A
- Rds On (Typ):
- 98mOhm
- Input Type:
- -
- Features:
- Slew Rate Controlled, Status Flag
- Fault Protection:
- Over Temperature, Over Voltage, Reverse Current, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WCSPC (1.9x1.9)
TCK321G,LF FAQ
1.How can I place an order for TCK321G,LF through Aetrix?
Please submit a Request for Quotation (RFQ) for TCK321G,LF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TCK321G,LF reliable?
The price and inventory of TCK321G,LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCK321G,LF is usually 5 days.
3.What payment methods are accepted for TCK321G,LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCK321G,LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCK321G,LF?
TCK321G,LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCK321G,LF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TCK321G,LF?
For technical support, including TCK321G,LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCK321G,LF requirements.
6.How does Aetrix verify that TCK321G,LF is sourced from the original manufacturer or authorized distributors?
All TCK321G,LF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TCK321G,LF meets industry standards.
7.What is the process for return or replacement of TCK321G,LF?
All TCK321G,LF units undergo pre-shipment inspection (PSI). If there is an issue with TCK321G,LF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TCK321G,LF part is unused and in its original packaging.
Return procedure for TCK321G,LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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