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Toshiba Semiconductor and Storage TCR3DM28,LF
- Part No.:
- TCR3DM28,LF
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
TCR3DM28,LF.pdf
- Description:
- IC REG LINEAR 2.8V 300MA 4DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,334
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Product details
Overview
TCR3DM28,LF from Toshiba Electronic Devices & Storage Corporation is a 2.8 V fixed-output, 300 mA CMOS low-dropout regulator with inrush current protection, auto-discharge, and on/off control input. It delivers 210 mV typical dropout at full load, 38 μVrms output noise, and ±80 mV load transient response with 1.0 μF ceramic capacitors-designed for power rail stabilization in space-constrained portable electronics.
For engineers reviewing the TCR3DM28,LF datasheet, TCR3DM28,LF pinout, TCR3DM28,LF application, or TCR3DM28,LF equivalent, key selection criteria include its DFN4/DFN4E (1.0 mm × 1.0 mm) ultra-small package, guaranteed 2.8 V ±1.0% output accuracy, -40°C to +85°C operating range, and compatibility with low-ESR ceramic input/output capacitors.
Technical Context
The TCR3DM28,LF integrates a CMOS pass transistor with internal inrush current limiting and an active auto-discharge circuit tied to the CONTROL pin. Its feedback loop is optimized for stability with 1.0 μF ceramic output capacitance and achieves 70 dB ripple rejection at 1 kHz.
It operates across 1.75–5.5 V input voltage range and features dual-level protection: thermal shutdown triggers at ~150°C junction temperature, while overcurrent protection limits output current to prevent latch-up under short-circuit conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±1.0% - ensures stable core or I/O rail for microcontrollers and sensors without external feedback components. |
| Max Output Current | 300 mA - supports moderate-power subsystems like RF transceivers or display drivers in handheld devices. |
| Dropout Voltage | 210 mV typ. at 300 mA - enables regulation from 3.01 V input, extending battery runtime in single-cell Li-ion or Li-poly systems. |
| Output Noise | 38 μVrms (10 Hz–100 kHz) - minimizes interference in noise-sensitive analog signal chains and ADC reference supplies. |
| Load Transient Response | ±80 mV (1 mA ⇔ 300 mA, COUT = 1.0 μF) - maintains voltage integrity during rapid processor wake/sleep transitions. |
| Ripple Rejection | 70 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Quiescent Current | 68 μA typ. at 2.8 V - reduces standby power loss in always-on sensor nodes and IoT edge devices. |
| Control Logic | CONTROL pin: ON ≥1.0 V, OFF ≤0.4 V - enables clean power sequencing with standard GPIOs without level-shifting. |
Pinout & Package
TCR3DM28,LF uses the ultra-compact DFN4/DFN4E package (1.0 mm × 1.0 mm × 0.58 mm), with exposed center pad for thermal conduction and mechanical anchoring. Weight is 1.3 mg (typ.).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Accepts 1.75–5.5 V; requires 1.0 μF ceramic decoupling capacitor placed adjacent to pin for stability. |
| VOUT | Regulated Output | Delivers fixed 2.8 V; connects directly to load; 1.0 μF ceramic output capacitor mandatory for transient response and PSRR. |
| GND | Ground Reference | Common return path for input, output, and control circuits; must be low-impedance and tied to center pad for thermal performance. |
| CONTROL | Enable/Disable Input | Active-high logic input; internal pull-down ensures default OFF state; drives high (>1.0 V) to enable regulator output. |
Key Features
| Feature | Design Value |
|---|---|
| Inrush Current Protection | Prevents input voltage sag and system brownout during cold-start by limiting initial charge current into output capacitor. |
| Auto-Discharge Function | Internally discharges VOUT to GND within milliseconds after CONTROL goes low-eliminates need for external bleed resistor in power-gated domains. |
| Ultra-Small DFN4/DFN4E | 1.0 mm × 1.0 mm footprint saves >70% board area vs. SOT-23 packages-critical for multi-rail PMIC consolidation in smartphones and wearables. |
| Low-Noise CMOS Architecture | 38 μVrms output noise enables direct powering of precision analog front-ends, RF synthesizers, and high-resolution ADCs without additional filtering. |
| Thermal & Overcurrent Protection | Integrated shutdown circuits protect against sustained overload or PCB-level thermal runaway-no external thermal sensor or current-sense resistor required. |
| Ceramic Capacitor Compatibility | Stable operation with 1.0 μF X5R/X7R ceramics (ESR <10 Ω) simplifies BOM and eliminates tantalum or aluminum electrolytic dependencies. |
Applications
| Smartphone Application Processor Core Rail | Wearable Heart Rate Sensor Module |
|---|---|
Use Scenario: Powers ARM Cortex-A/M series CPU cores requiring tightly regulated 2.8 V supply with fast dynamic response during burst-mode execution. IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering clean power to SoC core domain, synchronized to system power management IC via CONTROL pin. Use Value: ±80 mV load transient response prevents core voltage collapse during 1–300 mA current steps, ensuring deterministic instruction execution and avoiding reset events. | Use Scenario: Supplies photodiode amplifier and analog signal chain in optical PPG sensor worn on wrist with strict size and battery life constraints. IC Role / Device Role / Timing Role: Low-noise bias source for transimpedance amplifier and ADC reference buffer; enabled only during measurement cycles via CONTROL pin. Use Value: 38 μVrms noise floor preserves SNR in sub-μV physiological signal acquisition; auto-discharge eliminates residual voltage that could bias photodiode between readings. |
| Bluetooth LE Audio Earbud Codec Power | Industrial Wireless Sensor Node MCU Rail |
Use Scenario: Provides stable 2.8 V to low-power DSP and audio codec IC in true wireless stereo earbuds where EMI and thermal density are critical. IC Role / Device Role / Timing Role: Dedicated LDO for audio processing block, isolated from noisy digital rails; CONTROL pin coordinated with Bluetooth stack sleep/wake states. Use Value: 70 dB ripple rejection attenuates switching noise from shared buck converter, preventing audible artifacts in 24-bit/96 kHz playback. | Use Scenario: Powers ARM Cortex-M4 MCU and sub-GHz RF transceiver in battery-operated predictive maintenance sensor mounted on rotating machinery. IC Role / Device Role / Timing Role: Main system rail regulator with CONTROL pin driven by MCU GPIO to disable power during deep-sleep intervals (10 μA quiescent). Use Value: 68 μA quiescent current extends 10-year battery life; -40°C to +85°C rating ensures reliable operation in uncontrolled industrial ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, ultra-small LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCS2120L-28V | 200 mA max output, 180 mV dropout at 200 mA, no auto-discharge function | Lacks integrated discharge path; requires external MOSFET/resistor for VOUT bleed | Select when lower cost and reduced feature set suffice for non-power-gated systems. |
| XC6219B282MR-G | 300 mA output, 250 mV dropout at 300 mA, 45 μVrms noise, no inrush protection | No dedicated inrush limiting circuit; higher risk of input rail disturbance during startup | Choose when ultra-low noise is secondary to cost and footprint, and input source has robust current limiting. |
Compared with TCR3DM28,LF, TCS2120L-28V offers smaller solution size but sacrifices 100 mA drive capability and auto-discharge functionality, while XC6219B282MR-G matches current rating and noise performance but lacks inrush current protection-making TCR3DM28,LF uniquely suited for battery-powered systems requiring controlled startup and zero-volt hold-off.
Availability
TCR3DM28,LF is available at Aetrix Electronics and suitable for smartphone power management, wearable biosensor modules, Bluetooth audio subsystems, industrial wireless sensor nodes, and portable medical diagnostics requiring stable component supply and long-term lifecycle support.
Supply support for TCR3DM28,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 solutions for consumer, industrial, and automotive markets, with emphasis on energy efficiency and miniaturization.
The TCR3DM series targets portable electronics requiring ultra-compact, low-noise, feature-rich LDOs-specifically engineered to replace larger regulators in space-constrained battery-powered devices while maintaining robust protection and precise regulation.
FAQ
What is the guaranteed output voltage tolerance for TCR3DM28,LF?
The TCR3DM28,LF guarantees ±1.0% output voltage accuracy across its operating conditions (IOUT = 50 mA, Tj = 25°C). This specification applies specifically to the 2.8 V output variant and ensures stable power delivery to sensitive loads such as microcontroller cores and analog sensors without requiring external trimming.
Does TCR3DM28,LF require external components for stable operation?
Yes, TCR3DM28,LF requires two 1.0 μF ceramic capacitors-one at VIN and one at VOUT-for guaranteed stability, transient response, and PSRR performance. The datasheet specifies ESR <10 Ω for optimal behavior, and no additional resistors, diodes, or compensation networks are needed due to its internally optimized control loop.
How does the auto-discharge function operate in TCR3DM28,LF?
When the CONTROL pin is pulled low (<0.4 V), the TCR3DM28,LF activates an internal discharge switch between VOUT and GND, rapidly draining the output capacitor. This action brings VOUT to near-zero volts within milliseconds, eliminating residual voltage that could interfere with power sequencing or cause leakage in downstream circuits.
What thermal derating applies to TCR3DM28,LF at elevated ambient temperatures?
TCR3DM28,LF's maximum power dissipation decreases linearly above 25°C ambient, with full 420 mW rating valid only on a defined FR4 test board (40 mm × 40 mm, 50% copper coverage). At 85°C ambient, usable power drops to approximately 200 mW-requiring careful thermal design and layout to maintain safe junction temperature below 150°C.
Can TCR3DM28,LF be used with input voltages below 2.8 V?
No-TCR3DM28,LF requires minimum input voltage of 1.75 V, but regulation is only possible when VIN ≥ VOUT + VDO. With 210 mV typical dropout, it needs at least 3.01 V input to sustain 2.8 V output at 300 mA. Below that threshold, output voltage collapses linearly with input, and the device enters dropout mode without regulation.
TCR3DM28,LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- TCR3DM
- Package/Case:
- 4-UDFN 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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 65 µA
- Current - Supply (Max):
- 78 µA
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-DFN (1x1)
TCR3DM28,LF FAQ
1.How can I place an order for TCR3DM28,LF through Aetrix?
Please submit a Request for Quotation (RFQ) for TCR3DM28,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 TCR3DM28,LF reliable?
The price and inventory of TCR3DM28,LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCR3DM28,LF is usually 5 days.
3.What payment methods are accepted for TCR3DM28,LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCR3DM28,LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCR3DM28,LF?
TCR3DM28,LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCR3DM28,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 TCR3DM28,LF?
For technical support, including TCR3DM28,LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCR3DM28,LF requirements.
6.How does Aetrix verify that TCR3DM28,LF is sourced from the original manufacturer or authorized distributors?
All TCR3DM28,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 TCR3DM28,LF meets industry standards.
7.What is the process for return or replacement of TCR3DM28,LF?
All TCR3DM28,LF units undergo pre-shipment inspection (PSI). If there is an issue with TCR3DM28,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 TCR3DM28,LF part is unused and in its original packaging.
Return procedure for TCR3DM28,LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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