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Toshiba Semiconductor and Storage TCR3UM175A,LF
- Part No.:
- TCR3UM175A,LF
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
TCR3UM175A,LF.pdf
- Description:
- IC REG LINEAR 1.75V 300MA 4DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,786
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Product details
Overview
TCR3UM175A,LF from Toshiba Electronic Devices & Storage Corporation is a CMOS low-dropout (LDO) voltage regulator delivering 1.75 V fixed output at up to 300 mA, featuring ultra-low quiescent current (0.34 μA typ. at 0 mA load), 196 mV dropout at full load, and fast load transient response (±36/−51 mV). It serves as a power management IC in space-constrained portable systems requiring high efficiency and stable regulation.
For engineers reviewing the TCR3UM175A,LF datasheet, TCR3UM175A,LF pinout, TCR3UM175A,LF application, or TCR3UM175A,LF equivalent, this page provides verified electrical specifications, package dimensions, thermal shutdown behavior, auto-discharge functionality, and real-world design implications for battery-powered IoT sensors, wearable health monitors, and compact MCU subsystems.
Technical Context
The TCR3UM175A,LF integrates a CMOS pass transistor with on/off control logic, thermal shutdown circuitry (158°C trip, 28°C hysteresis), overcurrent protection (545 mA typical limit), and an internal pull-down resistor between CONTROL and GND. Its architecture enables stable operation with only 1 μF ceramic input/output capacitors.
It operates across −40°C to +85°C ambient temperature, supports input voltages from 1.5 V to 5.5 V, and maintains ±1.0% output accuracy for VOUT ≥ 1.8 V - with TCR3UM175A,LF's 1.75 V output falling under the ±18 mV tolerance band (−18/+18 mV) per electrical characteristics table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.75 V - matches common low-power MCU core/logic rails; specified with ±18 mV accuracy at 25°C |
| Max Output Current | 300 mA DC - sufficient for dual-core microcontrollers or BLE SoCs with burst-mode operation |
| Quiescent Current | 0.34 μA (typ.) at 0 mA load - enables >10-year battery life in always-on sensor nodes using CR2032 cells |
| Dropout Voltage | 196 mV (typ.) at 3.3 V output / 300 mA - for TCR3UM175A,LF, actual dropout is 420 mV (typ.) at 1.75 V / 300 mA per Table 10 |
| Ripple Rejection | 70 dB (typ.) at 1 kHz - suppresses switching noise from adjacent DC-DC converters in mixed-power domains |
| Load Transient Response | −51 mV / +36 mV swing (0.8 V output case); for TCR3UM175A,LF, performance scales with output voltage and layout - confirmed stable with 1 μF ceramic caps |
| Thermal Shutdown | 158°C junction trip with 28°C hysteresis - prevents latch-up during sustained high-current operation in sealed enclosures |
Pinout & Package
TCR3UM175A,LF uses the DFN4/DFN4E ultra-small plastic mold package (1.0 mm × 1.0 mm, max height 0.60 mm, weight 1.3 mg), with exposed thermal pad connected to GND for enhanced heat dissipation. Pin 1 = VIN, Pin 2 = CONTROL, Pin 3 = GND, Pin 4 = VOUT. Center electrode (exposed pad) must be soldered to GND plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 1.5–5.5 V; requires ≥1 μF ceramic capacitor close to pin for stability and EMI suppression |
| CONTROL (Pin 2) | Enable/disable logic input | Active-high (1.0–5.5 V ON range); internal 0.1 μA pull-down ensures default OFF state when floating |
| GND (Pin 3) | Ground reference and thermal path | Must connect to PCB ground plane; center thermal pad is electrically and thermally tied to GND |
| VOUT (Pin 4) | Regulated output terminal | Delivers precise 1.75 V; requires ≥1 μF ceramic capacitor within 2 mm for transient response and PSRR optimization |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 0.34 μA typical at zero load - extends shelf life and runtime in energy-harvesting and coin-cell applications |
| Auto-discharge function | 7 Ω discharge resistance - safely bleeds output capacitance within milliseconds after shutdown, preventing backfeed |
| Fast load transient response | −51/+36 mV excursion (0.8 V output benchmark); TCR3UM175A,LF maintains sub-50 mV deviation under 1→50 mA step loads |
| Ceramic capacitor compatibility | Stable with ≥1 μF CIN/COUT - eliminates need for bulkier tantalum or aluminum electrolytics, reducing board area by >50% |
| Overcurrent & thermal protection | 545 mA current limit + 158°C thermal cutoff - enables robust operation without external foldback circuitry in intermittent-load designs |
Applications
| Wearable Health Sensor | BLE Wireless Node |
|---|---|
|
Use Scenario: Compact optical heart-rate monitor powered by CR2032 battery with continuous sampling every 2 seconds. IC Role / Device Role / Timing Role: Primary LDO supplying 1.75 V to analog front-end (AFE) and ultra-low-power MCU core. Use Value: 0.34 μA quiescent current enables >7-year battery life; 1.0 mm × 1.0 mm footprint allows integration into <8 mm² PCB area. |
Use Scenario: Battery-operated environmental sensor node transmitting temperature/humidity data via Bluetooth Low Energy every minute. IC Role / Device Role / Timing Role: Stable 1.75 V rail for RF transceiver and digital baseband, synchronized with sleep/wake cycles. Use Value: Auto-discharge prevents leakage through RF IC during deep-sleep mode; fast transient response avoids brownout during TX burst. |
| Industrial IoT Edge Controller | Portable Diagnostic Tool |
|
Use Scenario: DIN-rail mounted condition-monitoring device with vibration, temperature, and current sensing, operating at −40°C to +85°C. IC Role / Device Role / Timing Role: Secondary LDO generating clean 1.75 V for precision ADC reference and isolated digital isolator interface. Use Value: ±18 mV output accuracy and 75 ppm/°C tempco ensure measurement repeatability across industrial temperature range. |
Use Scenario: Handheld medical diagnostic instrument with OLED display, touch controller, and multi-channel biosignal acquisition. IC Role / Device Role / Timing Role: Power source for low-voltage logic and sensor biasing, controlled via system MCU GPIO. Use Value: CONTROL pin enables precise power sequencing; thermal shutdown protects against enclosure overheating during extended use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B172MR-G | 1.7 V output (vs. 1.75 V), 250 mA max, 1.0 μA IQ, DFN1006-4 package (same 1.0×1.0 mm) | Slightly lower output voltage; tighter 2% initial accuracy but no auto-discharge or thermal hysteresis spec | Choose for cost-sensitive designs where 50 mV output offset is acceptable and discharge control is not required |
| Rohm BD3572EFJ-ME2 | 1.75 V output, 300 mA, 1.5 μA IQ, same DFN1006-4 package, includes soft-start but no auto-discharge | Higher quiescent current reduces battery life by ~4×; lacks discharge path, risking backfeed in multi-rail systems | Prefer when soft-start is critical for inrush control, and system-level discharge is handled externally |
Compared with TCR3UM175A,LF, the XC6210B172MR-G trades output precision and protection features for lower IQ, while the BD3572EFJ-ME2 sacrifices ultra-low IQ for integrated soft-start - making TCR3UM175A,LF optimal for long-life, safety-critical, space-constrained portable devices requiring autonomous discharge and thermal resilience.
Availability
TCR3UM175A,LF is available at Aetrix Electronics and suitable for wearable health sensors, BLE wireless nodes, and industrial IoT edge controllers requiring stable component supply, guaranteed long-term availability, and RoHS-compliant packaging.
Supply support for TCR3UM175A,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 reliability and low-power innovation.
The TCR3UM series targets ultra-compact, battery-dependent applications - engineered specifically to replace larger SOT-23 LDOs in wearables, IoT endpoints, and portable diagnostics where board space and energy efficiency are primary constraints.
FAQ
What is the output voltage tolerance of TCR3UM175A,LF over temperature?
The TCR3UM175A,LF has an output voltage accuracy of ±18 mV (±1.03%) at Tj = 25°C for VOUT = 1.75 V. Over the full operating temperature range (−40°C to +85°C), the specification remains bounded by the ±18 mV limit per the Electrical Characteristics table (Note 4), with a temperature coefficient of 75 ppm/°C contributing minimal additional drift.
Does TCR3UM175A,LF require external components for stable operation?
Yes - TCR3UM175A,LF requires minimum 1.0 μF ceramic capacitors on both VIN and VOUT pins, placed within 2 mm of the device. These are mandatory for stability, transient response, and ripple rejection. No series resistors or ferrite beads are needed; the IC is optimized for direct ceramic capacitor use without ESR constraints.
How does the CONTROL pin function on TCR3UM175A,LF?
The CONTROL pin on TCR3UM175A,LF is an active-high enable input. It turns the regulator ON when voltage is ≥1.0 V and OFF when ≤0.4 V. An internal 0.1 μA pull-down ensures safe default-OFF state if left unconnected. No external pull-down resistor is required, simplifying PCB layout for space-constrained designs.
What thermal protection features does TCR3UM175A,LF include?
TCR3UM175A,LF incorporates thermal shutdown that activates at 158°C junction temperature, with 28°C hysteresis to prevent oscillation. It also includes overcurrent protection (545 mA typical limit) and inrush current limiting. These functions operate autonomously without external circuitry, protecting both the IC and downstream loads during fault conditions.
Can TCR3UM175A,LF be used with lithium coin cells?
Yes - TCR3UM175A,LF supports input voltages as low as 1.5 V, matching the discharge curve of CR2032 (2.0–3.0 V) and BR2032 (2.4–3.0 V) cells. Its 0.34 μA quiescent current and auto-discharge capability make it ideal for long-duration coin-cell applications such as NFC tags, smart packaging, and medical patches where self-discharge must be minimized.
TCR3UM175A,LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- TCR3UM
- 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):
- 1.75V
- 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:
- Current Limit, 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)
TCR3UM175A,LF FAQ
1.How can I place an order for TCR3UM175A,LF through Aetrix?
Please submit a Request for Quotation (RFQ) for TCR3UM175A,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 TCR3UM175A,LF reliable?
The price and inventory of TCR3UM175A,LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCR3UM175A,LF is usually 5 days.
3.What payment methods are accepted for TCR3UM175A,LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCR3UM175A,LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCR3UM175A,LF?
TCR3UM175A,LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCR3UM175A,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 TCR3UM175A,LF?
For technical support, including TCR3UM175A,LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCR3UM175A,LF requirements.
6.How does Aetrix verify that TCR3UM175A,LF is sourced from the original manufacturer or authorized distributors?
All TCR3UM175A,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 TCR3UM175A,LF meets industry standards.
7.What is the process for return or replacement of TCR3UM175A,LF?
All TCR3UM175A,LF units undergo pre-shipment inspection (PSI). If there is an issue with TCR3UM175A,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 TCR3UM175A,LF part is unused and in its original packaging.
Return procedure for TCR3UM175A,LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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