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Toshiba Semiconductor and Storage TCR3UG31A,LF
- Part No.:
- TCR3UG31A,LF
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
TCR3UG31A,LF.pdf
- Description:
- IC REG LINEAR 3.1V 300MA 4WCSP-F
- Quantity:
- Payment:
- Shipping:
Inventory:3,024
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Product details
Overview
TCR3UG31A,LF from Toshiba Electronic Devices & Storage Corporation is a CMOS low-dropout linear regulator with fixed 3.1 V output, ultra-low quiescent current (0.34 μA typ. at 0 mA load), 140 mV dropout at 300 mA, and auto-discharge functionality - designed for power management in space-constrained portable electronics.
For engineers reviewing the TCR3UG31A,LF datasheet, TCR3UG31A,LF pinout, TCR3UG31A,LF application, or TCR3UG31A,LF equivalent, this device delivers verified fast load transient response (±60 mV), ±1.0% output accuracy (≥1.8 V), and stable operation with 1 μF ceramic input/output capacitors - critical for battery-powered IoT sensors, wearable health monitors, and compact wireless modules.
Technical Context
The TCR3UG31A,LF integrates a CMOS pass transistor with on/off control logic, thermal shutdown, overcurrent protection, and an internal auto-discharge switch (RSD = 10 Ω). Its architecture enables stable regulation down to 1.5 V input while maintaining ultra-low IB(ON) across output voltages up to 5.0 V.
It operates within −40°C to +85°C ambient temperature, supports 1.5–5.5 V input range, and achieves 70 dB ripple rejection at 1 kHz - enabled by internal compensation optimized for 1 μF ceramic capacitors without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.1 V - eliminates external feedback network; ensures precise rail for 3.3 V–tolerant microcontrollers and RF transceivers. |
| Dropout Voltage | 140 mV (typ.) at 300 mA - enables >95% efficiency at VIN = 3.24 V, extending battery runtime in single-cell Li-ion/Li-poly systems. |
| Quiescent Current | 0.34 μA (typ.) at IOUT = 0 mA - reduces standby power loss to <1 nW per μA, critical for multi-year battery life in BLE/Wi-Fi edge nodes. |
| Ripple Rejection | 70 dB at 1 kHz - suppresses switching noise from DC-DC converters feeding the LDO input, preserving analog sensor signal integrity. |
| Load Transient | ±60 mV deviation (0.8 V-output test condition) - maintains system stability during rapid MCU wake/sleep transitions in wearables. |
| Accuracy | ±1.0% (for VOUT ≥ 1.8 V) - guarantees 3.069–3.131 V output under full temperature/load range, meeting tight ADC reference and PLL supply requirements. |
| Package | WCSP4F (0.645 mm × 0.645 mm, 0.33 mm max height) - smallest footprint in its class; enables placement beneath BGA packages or in <3 mm² PCB areas. |
Pinout & Package
TCR3UG31A,LF uses the WCSP4F ultra-miniature wafer-level chip-scale package (0.645 mm × 0.645 mm, 0.33 mm max thickness, 0.26 mg typical weight), optimized for high-density portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A) | VIN | Main power input (1.5–5.5 V); requires local 1 μF ceramic capacitor to minimize impedance and ensure stability. |
| 2 (B) | VOUT | Regulated 3.1 V output; connects directly to load; 1 μF ceramic capacitor mandatory for transient response and PSRR performance. |
| A (top-left) | GND | Power ground reference; must be tied to low-impedance PCB plane adjacent to VIN/VOUT pads to prevent noise coupling. |
| B (top-right) | CONTROL | Active-high enable input (VCT(OFF) ≤ 0.4 V, VCT(ON) ≥ 1.0 V); includes internal pull-down (0.1 μA) for default OFF state. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 10 Ω discharge path activates when CONTROL = LOW, rapidly draining VOUT capacitance to prevent residual voltage in sleep mode. |
| Ultra-low quiescent current | 0.34 μA typ. at zero load - reduces no-load power dissipation to <0.85 μW with 2.5 V input, enabling decade-scale coin-cell operation. |
| Ceramic capacitor compatibility | Stable with ≥1 μF X5R/X7R ceramics on both input and output - eliminates tantalum/Al-elec cost, size, and reliability concerns. |
| Fast load transient response | ±60 mV output deviation during 1 mA ↔ 50 mA step changes - prevents brownout resets in burst-mode wireless transceivers. |
| Thermal & overcurrent protection | Self-limiting shutdown triggers at Tj ≥ 150°C or ILIM exceeded - protects IC and PCB during short-circuit or overload events without external circuitry. |
Applications
| Smart Wearable Sensors | BLE/Wi-Fi Edge Node Power |
|---|---|
|
Use Scenario: Continuous ECG/PPG monitoring in wrist-worn health trackers with 10+ year coin-cell battery life. IC Role / Device Role / Timing Role: Primary 3.1 V supply for ultra-low-power MCU, analog front-end, and optical sensor ASIC. Use Value: 0.34 μA quiescent current and auto-discharge extend shelf life and eliminate leakage-induced battery drain during storage. |
Use Scenario: Compact environmental sensor node transmitting data via Bluetooth Low Energy every 5 seconds. IC Role / Device Role / Timing Role: Post-regulator for RF transceiver and MCU core, decoupling noisy DC-DC converter output. Use Value: 70 dB ripple rejection at 1 kHz prevents digital switching noise from corrupting RF receive sensitivity and ADC measurements. |
| Portable Medical Diagnostics | Miniature IoT Asset Tags |
|
Use Scenario: Handheld pulse oximeter operating from AAA alkaline batteries with strict 3.0–3.3 V supply window. IC Role / Device Role / Timing Role: Precision voltage source for LED drivers and photodiode amplifier bias rails. Use Value: ±1.0% output accuracy ensures consistent LED intensity and analog gain calibration across temperature and battery discharge. |
Use Scenario: GPS-tracked logistics tag powered by primary lithium battery, requiring 15-year operational life. IC Role / Device Role / Timing Role: Always-on LDO supplying real-time clock, memory backup, and low-power MCU retention domain. Use Value: WCSP4F package (0.645 mm × 0.645 mm) enables integration into <100 mm² PCB area, reducing bill-of-materials and assembly cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B312MR-G | 3.1 V fixed output, 250 mV dropout at 300 mA, 1.0 μA IQ, SOT-25 package (2.9 × 2.8 mm) | Larger footprint and higher dropout limit minimum input to 3.35 V - unsuitable for single-cell Li-ion below 3.4 V. | Select when board space allows larger package and higher IQ is acceptable for non-battery-critical subsystems. |
| Rohm BD3572EFJ-ME2 | 3.1 V fixed output, 180 mV dropout at 300 mA, 0.6 μA IQ, HTSOP-J8 package (4.0 × 4.0 mm) | No auto-discharge; requires external MOSFET for VOUT bleed; higher thermal resistance limits power density. | Prefer for industrial environments where auto-discharge is unnecessary and thermal margin >10°C is available. |
Compared with TCR3UG31A,LF, the XC6210B312MR-G trades ultra-small size and ultra-low IQ for higher dropout and larger footprint, while BD3572EFJ-ME2 sacrifices auto-discharge and package miniaturization for higher thermal robustness - making TCR3UG31A,LF uniquely suited for space- and battery-limited portable designs.
Availability
TCR3UG31A,LF is available at Aetrix Electronics and suitable for portable medical diagnostics, BLE/Wi-Fi edge nodes, smart wearable sensors, and miniature IoT asset tags requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TCR3UG31A,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-efficiency, miniaturized semiconductor solutions for consumer, industrial, and automotive markets, with emphasis on power management and analog ICs.
The TCR3UG series was developed specifically for ultra-low-power portable electronics - delivering industry-leading quiescent current, WCSP packaging, and integrated protection in a single-chip LDO solution.
FAQ
What is the maximum input voltage rating for TCR3UG31A,LF?
The absolute maximum input voltage for TCR3UG31A,LF is 6.0 V, but the recommended operating range is 1.5 V to 5.5 V. Exceeding 5.5 V may trigger overvoltage stress not covered by warranty, and operation above 6.0 V risks permanent damage. The device is optimized for single-cell Li-ion (up to 4.2 V) and 3.3 V/5 V system rails.
Does TCR3UG31A,LF require external capacitors, and what values are validated?
Yes, TCR3UG31A,LF requires ≥1.0 μF ceramic capacitors on both input (CIN) and output (COUT) for stability and transient performance. Toshiba validates operation with standard X5R/X7R 1 μF capacitors - no ESR tuning or additional components are needed, simplifying layout and reducing BOM count compared to legacy LDOs.
How does the auto-discharge function operate in TCR3UG31A,LF?
In TCR3UG31A,LF, the auto-discharge function activates automatically when the CONTROL pin is pulled LOW, connecting VOUT to GND through an internal 10 Ω switch. This rapidly discharges output capacitance, preventing residual voltage from powering downstream circuits during deep-sleep or shutdown - a key feature absent in the TCR3UG31B variant.
What is the output voltage accuracy specification for TCR3UG31A,LF across temperature?
TCR3UG31A,LF guarantees ±1.0% output voltage accuracy for VOUT ≥ 1.8 V, including the 3.1 V output, over the full operating temperature range of −40°C to +85°C. This is confirmed in the Electrical Characteristics table (Section 9) and applies under 1–300 mA load conditions with proper capacitor selection.
Can TCR3UG31A,LF be used with input voltages below 3.1 V?
No - TCR3UG31A,LF requires VIN ≥ (VOUT + VDO). At 300 mA load, its typical dropout is 140 mV, so minimum functional input is ~3.24 V. Below that, regulation fails and VOUT drops linearly with VIN. For sub-3.1 V inputs, consider lower-VOUT variants like TCR3UG28A (2.8 V) or TCR3UG25A (2.5 V) from the same series.
TCR3UG31A,LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- TCR3UG
- Package/Case:
- 4-XFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.273V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 680 nA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Inrush Current, Over Current, Thermal Shutdown
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-WCSP-F (0.65x0.65)
TCR3UG31A,LF FAQ
1.How can I place an order for TCR3UG31A,LF through Aetrix?
Please submit a Request for Quotation (RFQ) for TCR3UG31A,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 TCR3UG31A,LF reliable?
The price and inventory of TCR3UG31A,LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCR3UG31A,LF is usually 5 days.
3.What payment methods are accepted for TCR3UG31A,LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCR3UG31A,LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCR3UG31A,LF?
TCR3UG31A,LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCR3UG31A,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 TCR3UG31A,LF?
For technical support, including TCR3UG31A,LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCR3UG31A,LF requirements.
6.How does Aetrix verify that TCR3UG31A,LF is sourced from the original manufacturer or authorized distributors?
All TCR3UG31A,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 TCR3UG31A,LF meets industry standards.
7.What is the process for return or replacement of TCR3UG31A,LF?
All TCR3UG31A,LF units undergo pre-shipment inspection (PSI). If there is an issue with TCR3UG31A,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 TCR3UG31A,LF part is unused and in its original packaging.
Return procedure for TCR3UG31A,LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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