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Toshiba Semiconductor and Storage TCR2EE185,LM(CT
- Part No.:
- TCR2EE185,LM(CT
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package:
- SOT-553
- Datasheet:
-
TCR2EE185,LM(CT.pdf
- Description:
- IC REG LINEAR 1.85V 200MA ESV
- Quantity:
- Payment:
- Shipping:
Inventory:6,766
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Product details
Overview
TCR2EE185,LM(CT from Toshiba Electronic Devices & Storage Corporation is a 1.85 V fixed-output, 200 mA CMOS low dropout regulator with fast load transient response (±60 mV), low noise (35 μVrms), and on/off control input. It operates from 1.5–5.5 V input, features 180 mV dropout at 150 mA, ±1.0% output accuracy (≥1.8 V), and overcurrent protection. It powers sensitive analog/RF circuitry in portable instrumentation and wireless modules.
For engineers reviewing the TCR2EE185,LM(CT datasheet, TCR2EE185,LM(CT pinout, TCR2EE185,LM(CT application, or TCR2EE185,LM(CT equivalent, key selection criteria include dropout voltage at 150 mA, load transient performance with 1.0 μF ceramic output capacitor, control logic thresholds (ON ≥1.0 V, OFF ≤0.4 V), and ESV (SOT-553) package thermal limits.
Technical Context
The TCR2EE185,LM(CT uses a CMOS pass transistor architecture enabling ultra-low quiescent current (35 μA typ.) and high ripple rejection (73 dB at 1 kHz). Its internal Auto-discharge function actively discharges the output when disabled, preventing residual voltage hold-up in power-gated systems.
Designed for stable operation with minimal external components, it supports ceramic input (≥0.1 μF) and output (≥1.0 μF) capacitors and includes integrated overcurrent protection and pull-down on the CONTROL pin to ensure defined OFF-state behavior without external resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.85 V ±1.0% (ensures precision biasing for RF LNA or ADC reference stages) |
| Max output current | 200 mA DC (supports moderate-power microcontrollers or sensor signal chains) |
| Dropout voltage | 230 mV typ. at 150 mA (enables regulation from 2.08 V input, critical for single-cell Li-ion or coin-cell systems) |
| Load transient response | ±60 mV with 1.0 μF COUT (maintains stability during digital core switching events) |
| Output noise | 35 μVrms (10 Hz–100 kHz) (minimizes phase noise in VCO/PLL supply rails) |
| Quiescent current | 35 μA typ. at zero load (extends battery life in always-on sensor nodes) |
| Ripple rejection | 73 dB at 1 kHz (attenuates switching regulator coupling into analog subsystems) |
| Control logic | VCT(OFF) ≤ 0.4 V, VCT(ON) ≥ 1.0 V (compatible with 1.8 V GPIO without level-shifting) |
Pinout & Package
TCR2EE185,LM(CT is packaged in ESV (SOT-553), a 1.6 mm × 1.6 mm × 0.55 mm ultra-small surface-mount package weighing 3.0 mg (typ.). This footprint enables high-density PCB layouts in space-constrained wearables and IoT edge nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input power supply | Accepts 1.5–5.5 V; requires ≥0.1 μF ceramic decoupling close to pin |
| VOUT | Regulated output | Delivers stable 1.85 V; must connect ≥1.0 μF ceramic capacitor directly to GND |
| GND | Ground reference | Common return path for VIN, VOUT, and CONTROL; low-impedance plane required |
| CONTROL | Enable/disable input | Active-high logic: ≥1.0 V enables regulator; ≤0.4 V disables with Auto-discharge active |
| NC | No connect | Internally unconnected; must remain floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 230 mV typ. at 150 mA enables operation from marginal input sources like aging batteries |
| Fast load transient response | ±60 mV deviation with 1 mA ↔ 150 mA step ensures clean power during processor wake/sleep transitions |
| Auto-discharge function | Actively pulls VOUT to GND when CONTROL = LOW, eliminating need for external discharge FET in power sequencing |
| Ceramic capacitor compatibility | Stable with ≥0.1 μF CIN and ≥1.0 μF COUT (no ESR requirements), reducing BOM count and board area |
| High accuracy output | ±1.0% tolerance over temperature (−40°C to +85°C) supports tight-tolerance analog circuits without calibration |
| Pull-down on CONTROL pin | Internal resistor ensures safe default-OFF state, removing need for external pull-down resistor |
Applications
| Wireless Sensor Node Power | RF Front-End Bias Supply |
|---|---|
|
Use Scenario: Powering BLE/Wi-Fi SoC and environmental sensors in battery-operated industrial monitors. IC Role / Device Role / Timing Role: Primary LDO supplying core voltage (1.85 V) to MCU and radio transceiver. Use Value: Low 35 μA quiescent current extends shelf life; fast transient response prevents radio TX/RX glitches during burst transmission. |
Use Scenario: Providing clean bias to low-noise amplifiers (LNAs) and mixers in 2.4 GHz ISM-band receivers. IC Role / Device Role / Timing Role: Noise-sensitive analog supply rail decoupled from noisy digital domains. Use Value: 35 μVrms output noise and 73 dB ripple rejection suppress switching noise from adjacent DC-DC converters. |
| Portable Medical Instrumentation | Wearable Health Monitor Core Supply |
|
Use Scenario: Regulating power for ECG/PPG analog front-ends and low-power ADCs in handheld diagnostics. IC Role / Device Role / Timing Role: Precision voltage source for signal conditioning and data acquisition stages. Use Value: ±1.0% output accuracy ensures consistent gain calibration; Auto-discharge prevents patient electrode leakage paths after shutdown. |
Use Scenario: Supplying 1.85 V to motion sensor hubs and ultra-low-power MCUs in fitness trackers. IC Role / Device Role / Timing Role: Always-on regulated rail enabling rapid wake-from-sleep response. Use Value: ESV package minimizes PCB footprint; 230 mV dropout allows operation down to 2.08 V, maximizing usable battery range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, fast-transient LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCS201850000000 | 200 mA, 1.85 V output, 250 mV dropout (150 mA), 50 μVrms noise, SOT-23-5 package | Larger footprint (2.9 mm × 2.8 mm), higher noise degrades RF sensitivity | Choose if SOT-23-5 is preferred for legacy layout compatibility |
| XC6218D185MR-G | 200 mA, 1.85 V output, 200 mV dropout (150 mA), 40 μVrms noise, SOT-25 package | Requires external pull-down on EN pin; no Auto-discharge function | Choose if lower dropout is prioritized and external discharge circuitry is acceptable |
Compared with TCR2EE185,LM(CT, the TCS201850000000 trades smaller noise margin and larger size for broader distributor availability, while the XC6218D185MR-G offers marginally better dropout but lacks integrated Auto-discharge-requiring additional components for safe power-down sequencing.
Availability
TCR2EE185,LM(CT is available at Aetrix Electronics and suitable for wireless sensor nodes, RF front-end biasing, portable medical instrumentation, wearable health monitors, and low-power IoT edge devices requiring stable component supply across production lifecycles.
Supply support for TCR2EE185,LM(CT 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 automotive, industrial, and consumer applications, with expertise in power management, logic, and analog ICs.
The TCR2EE series targets space-constrained, battery-powered systems demanding ultra-low quiescent current, fast transient response, and integrated power-control features-especially in portable instrumentation and wireless connectivity modules.
FAQ
What is the maximum input voltage rating for TCR2EE185,LM(CT?
The absolute maximum input voltage for TCR2EE185,LM(CT is 6.0 V. However, 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 sustained operation above this limit risks junction overheating even within thermal derating guidelines. Always verify input source regulation before integrating TCR2EE185,LM(CT into your design.
Does TCR2EE185,LM(CT require an external pull-down resistor on the CONTROL pin?
No, TCR2EE185,LM(CT includes an internal pull-down resistor on the CONTROL pin, ensuring a defined LOW state when left unconnected. This eliminates the need for an external resistor and simplifies PCB layout. The device enters standby mode (IB(OFF) ≤ 1.0 μA) when CONTROL is ≤0.4 V, activating Auto-discharge to safely discharge VOUT.
Can TCR2EE185,LM(CT operate with a 0.47 μF output capacitor?
No-TCR2EE185,LM(CT requires a minimum output capacitance of 1.0 μF, as specified in its operating ranges. Using 0.47 μF violates the stability condition and may cause oscillation or excessive load transient deviation beyond the rated ±60 mV. Ceramic capacitors ≥1.0 μF with ESR <10 Ω are recommended for guaranteed performance.
What is the dropout voltage of TCR2EE185,LM(CT at 100 mA load?
The dropout voltage of TCR2EE185,LM(CT is 230 mV (typ.) at 150 mA. At 100 mA, the dropout is lower-approximately 200 mV (typ.), based on the monotonic trend shown in the Dropout Voltage vs. Output Current curves for 1.8 V ≤ VOUT < 2.5 V products. This enables reliable regulation from as low as 2.05 V input at 100 mA load.
Is TCR2EE185,LM(CT RoHS compliant and lead-free?
Yes, TCR2EE185,LM(CT is RoHS compliant and lead-free, meeting EU Directive 2011/65/EU requirements. Toshiba confirms this status in its official product documentation and environmental compliance reports. For full material declarations and exemption details, refer to Toshiba's official environmental portal or contact their sales support team directly.
TCR2EE185,LM(CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- TCR2EE
- Package/Case:
- SOT-553
- 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):
- 1.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.31V @ 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:
- ESV
TCR2EE185,LM(CT FAQ
1.How can I place an order for TCR2EE185,LM(CT through Aetrix?
Please submit a Request for Quotation (RFQ) for TCR2EE185,LM(CT 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 TCR2EE185,LM(CT reliable?
The price and inventory of TCR2EE185,LM(CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCR2EE185,LM(CT is usually 5 days.
3.What payment methods are accepted for TCR2EE185,LM(CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCR2EE185,LM(CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCR2EE185,LM(CT?
TCR2EE185,LM(CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCR2EE185,LM(CT 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 TCR2EE185,LM(CT?
For technical support, including TCR2EE185,LM(CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCR2EE185,LM(CT requirements.
6.How does Aetrix verify that TCR2EE185,LM(CT is sourced from the original manufacturer or authorized distributors?
All TCR2EE185,LM(CT 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 TCR2EE185,LM(CT meets industry standards.
7.What is the process for return or replacement of TCR2EE185,LM(CT?
All TCR2EE185,LM(CT units undergo pre-shipment inspection (PSI). If there is an issue with TCR2EE185,LM(CT, 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 TCR2EE185,LM(CT part is unused and in its original packaging.
Return procedure for TCR2EE185,LM(CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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