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Toshiba Semiconductor and Storage TCR2EN125,LF
- Part No.:
- TCR2EN125,LF
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package:
- 4-XFDFN Exposed Pad
- Datasheet:
-
TCR2EN125,LF.pdf
- Description:
- IC REG LINEAR 1.25V 200MA 4SDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,734
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Product details
Overview
TCR2EN125,LF from Toshiba Electronic Devices & Storage Corporation is a 1.25 V fixed-output CMOS low dropout (LDO) voltage regulator in an ultra-small SDFN4/SDFN4E package (0.8 mm × 0.8 mm × 0.38 mm), delivering up to 200 mA with 360 mV typical dropout at 150 mA load, ±1.0% output accuracy (for VOUT ≥ 1.8 V; 1.25 V variant specified as ±18 mV), and 35 µVrms output noise at 2.5 V - deployed in space-constrained portable power rails such as cellular phone baseband ICs.
For engineers reviewing the TCR2EN125,LF datasheet, TCR2EN125,LF pinout, TCR2EN125,LF application, or TCR2EN125,LF equivalent, this page delivers verified technical context, exact pin roles, real-world load transient behavior (±55 mV step response), Auto-discharge functionality, and validated alternatives for compact, low-noise 1.25 V biasing in battery-powered systems.
Technical Context
The TCR2EN125,LF implements a CMOS-based LDO architecture with integrated on/off control input (CONTROL pin), enabling active discharge of output capacitance when disabled. Its internal reference and error amplifier are optimized for stability with ceramic capacitors as small as 1.0 µF at the output and 0.1 µF at the input.
It features overcurrent protection that limits output current during fault conditions and maintains regulation down to input voltages only 360 mV above the 1.25 V nominal output. The device operates across −40°C to +85°C ambient temperature and supports fast load transients due to high loop bandwidth and low output impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.25 V ±18 mV (typical accuracy spec for VOUT < 1.8 V) |
| Max Output Current | 200 mA - sufficient to power core logic or RF front-end bias circuits |
| Dropout Voltage | 360 mV (typ.) at IOUT = 150 mA - enables operation from Li-ion single-cell (3.0–4.2 V) or 1.8 V/2.5 V system rails |
| Quiescent Current | 35 µA (typ.) at zero load - extends battery life in always-on sensor or standby subsystems |
| Output Noise | 23 µVrms (typ.) at 1.25 V output, 10 Hz–100 kHz - suitable for noise-sensitive analog blocks like ADC references |
| Ripple Rejection | 73 dB (typ.) at 1 kHz - suppresses switching noise from upstream DC-DC converters |
| Load Transient Response | ±55 mV (typ.) for 1 mA ↔ 150 mA step with 1.0 µF COUT - maintains stable supply during burst-mode processor activity |
Pinout & Package
TCR2EN125,LF is housed in the ultra-small SDFN4/SDFN4E plastic mold package (0.8 mm × 0.8 mm × 0.38 mm, 0.6 mg typical weight), featuring a bottom-exposed thermal pad (center electrode) that must be connected to GND or left open per design requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Accepts 1.5–5.5 V input; must be decoupled with ≥0.1 µF ceramic capacitor near pin |
| VOUT | Regulated Output | Delivers stable 1.25 V; requires ≥1.0 µF ceramic output capacitor for stability and transient response |
| GND | Ground Reference | Common return path for input, output, and control circuits; connects to PCB ground plane |
| CONTROL | Enable/Disable Input | Logic-high (≥1.0 V) enables regulation; logic-low (≤0.4 V) disables output and activates Auto-discharge |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge Function | Actively discharges VOUT capacitor when CONTROL = LOW, preventing residual voltage hold-up in power sequencing |
| Ceramic Capacitor Compatibility | Stable with 0.1 µF input and 1.0 µF output ceramic caps - eliminates need for larger, less reliable tantalum or aluminum electrolytics |
| Low Quiescent Bias Current | 35 µA typical at zero load - minimizes standby power loss in battery-backed real-time clocks or IoT wake-up circuits |
| Precision Output Accuracy | ±18 mV tolerance at 1.25 V output - ensures reliable operation of 1.2 V core logic without margin overhead |
| Overcurrent Protection | Current-limiting circuit engages during short-circuit or overload - prevents thermal runaway and protects upstream source |
Applications
| Smartphone Baseband Power | Wearable Sensor Hub |
|---|---|
|
Use Scenario: Providing clean 1.25 V supply to baseband processor cores in LTE/5G handsets where board area is constrained and EMI sensitivity is high. IC Role / Device Role / Timing Role: Primary low-noise LDO for digital core rail, enabled via baseband SoC control signal. Use Value: Ultra-small SDFN4 footprint saves >0.64 mm² vs. standard SOT-23; 23 µVrms noise avoids corruption of RF synthesizer PLLs. |
Use Scenario: Powering ultra-low-power MEMS accelerometers and Bluetooth LE radio in fitness trackers with coin-cell batteries. IC Role / Device Role / Timing Role: Standby-mode LDO with CONTROL pin synchronized to MCU sleep/wake cycles. Use Value: 35 µA quiescent current extends battery life beyond 6 months; Auto-discharge ensures rapid power-down between motion events. |
| Medical Patch Monitor | Industrial Edge Node MCU |
|
Use Scenario: Delivering regulated 1.25 V to analog front-end (AFE) and microcontroller in disposable wireless ECG patches. IC Role / Device Role / Timing Role: Precision analog rail LDO with tight DC accuracy and low noise for biopotential signal integrity. Use Value: ±18 mV output tolerance meets AFE reference stability requirements; 73 dB ripple rejection isolates ECG signals from switching noise. |
Use Scenario: Biasing 1.2 V I/O banks of ARM Cortex-M4 MCUs in programmable logic controllers with wide input voltage range. IC Role / Device Role / Timing Role: Secondary LDO stage following buck converter, providing low-noise local regulation. Use Value: 360 mV dropout allows operation down to 1.61 V input - supports brown-out resilience during 24 V DC field bus dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2112K-1.25TRG1 | 1.25 V fixed output, 600 mA rating, SOT-23-5 package (2.9 mm × 1.6 mm), higher quiescent current (60 µA typ.) | Larger footprint; better suited for higher-current loads but less optimal for ultra-dense layouts | Select if >200 mA output capability or legacy SOT-23 assembly is required; not pin-compatible with TCR2EN125,LF |
| MCP1700T-1202E/TT | 1.2 V output (not 1.25 V), 250 mA rating, SOT-23-3 package, 1.6 µA quiescent current, no CONTROL pin or Auto-discharge | No enable/disable control; lower noise (25 µVrms) but lacks active discharge for precise power sequencing | Choose for ultra-low-IQ applications where 50 mV output voltage mismatch is acceptable and sequencing is handled externally |
Compared with AP2112K-1.25TRG1 and MCP1700T-1202E/TT, the TCR2EN125,LF uniquely combines 1.25 V precision, Auto-discharge, and sub-1 mm² footprint - making it optimal for space- and sequencing-critical portable designs where 200 mA is sufficient.
Availability
TCR2EN125,LF is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor hubs, medical patch monitors, industrial edge node MCUs, and portable instrumentation requiring stable component supply with guaranteed long-term sourcing.
Supply support for TCR2EN125,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-reliability semiconductor solutions, with expertise in power management, logic, memory, and discrete devices for consumer, industrial, and automotive markets.
The TCR2EN series targets ultra-compact, low-noise LDO applications in battery-powered portable electronics - emphasizing minimal footprint, fast transient response, and seamless integration with ceramic capacitors.
FAQ
What is the output voltage tolerance specification for TCR2EN125,LF?
The TCR2EN125,LF has a guaranteed output voltage tolerance of ±18 mV at 1.25 V under typical conditions (IOUT = 50 mA, Tj = 25°C). This specification applies specifically to output voltages below 1.8 V, as confirmed in the Electrical Characteristics table. The TCR2EN125,LF does not fall under the ±1.0% accuracy bin reserved for 1.8 V and higher variants.
Does TCR2EN125,LF support ceramic output capacitors, and what value is recommended?
Yes, the TCR2EN125,LF is fully compatible with ceramic output capacitors. The datasheet specifies stable operation with a minimum 1.0 µF X5R/X7R ceramic capacitor at the VOUT pin. Using smaller values may degrade load transient response or cause instability; ESR should remain below 10 Ω per Toshiba's application guidance.
How does the CONTROL pin function on TCR2EN125,LF, and what are its voltage thresholds?
The CONTROL pin on TCR2EN125,LF enables or disables regulation. It asserts ON when voltage is ≥1.0 V and OFF when ≤0.4 V. During OFF state, the device enters standby mode (IB(OFF) ≤ 1.0 µA) and activates Auto-discharge to rapidly deplete VOUT capacitance. The pin includes an internal pull-down to GND, eliminating need for external resistors.
What is the maximum allowable input voltage for TCR2EN125,LF, and what happens beyond that limit?
The absolute maximum input voltage for TCR2EN125,LF is 6.0 V. Operation above this level risks permanent damage to the internal CMOS pass transistor and protection circuitry. Within normal operating range (1.5–5.5 V), line regulation remains within 15 mV, ensuring robustness against upstream DC-DC ripple or battery voltage fluctuations.
Is thermal performance data available for TCR2EN125,LF on standard PCB layouts?
Yes - Toshiba characterizes power dissipation on a defined FR4 test board (40 mm × 40 mm × 1.6 mm, 50% copper coverage both sides). At 200 mA and 1.25 V output, worst-case power dissipation is ~250 mW, resulting in junction temperature rise of ~85°C above ambient under those conditions. Derating is required above 85°C ambient per the Absolute Maximum Ratings table.
TCR2EN125,LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- TCR2EN
- Package/Case:
- 4-XFDFN Exposed Pad
- 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):
- 1.25V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 150mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- -
- PSRR:
- 73dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-SDFN (0.8x0.8)
TCR2EN125,LF FAQ
1.How can I place an order for TCR2EN125,LF through Aetrix?
Please submit a Request for Quotation (RFQ) for TCR2EN125,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 TCR2EN125,LF reliable?
The price and inventory of TCR2EN125,LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCR2EN125,LF is usually 5 days.
3.What payment methods are accepted for TCR2EN125,LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCR2EN125,LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCR2EN125,LF?
TCR2EN125,LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCR2EN125,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 TCR2EN125,LF?
For technical support, including TCR2EN125,LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCR2EN125,LF requirements.
6.How does Aetrix verify that TCR2EN125,LF is sourced from the original manufacturer or authorized distributors?
All TCR2EN125,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 TCR2EN125,LF meets industry standards.
7.What is the process for return or replacement of TCR2EN125,LF?
All TCR2EN125,LF units undergo pre-shipment inspection (PSI). If there is an issue with TCR2EN125,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 TCR2EN125,LF part is unused and in its original packaging.
Return procedure for TCR2EN125,LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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