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Texas Instruments TPS71523DCKRM3
- Part No.:
- TPS71523DCKRM3
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TPS71523DCKRM3.pdf
- Description:
- 50-MA 24-V ULTRA-LOW-IQ LOW-DROP
- Quantity:
- Payment:
- Shipping:
Inventory:2,962
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Product details
Overview
TPS71523DCKRM3 from Texas Instruments is a fixed-output 2.3-V, 50-mA low-dropout linear regulator in SC70-5 package, featuring 3.2 μA typical quiescent current, 415 mV typical dropout at 50 mA, and stable operation with ≥0.47 μF output capacitance. It delivers ultra-low-power regulation for battery-powered microcontrollers in industrial sensing nodes.
For engineers reviewing the TPS71523DCKRM3 datasheet, TPS71523DCKRM3 pinout, TPS71523DCKRM3 application, or TPS71523DCKRM3 equivalent, key selection criteria include input voltage range (2.5 V to 24 V), junction temperature rating (–40°C to +125°C), overcurrent protection, and compatibility with ceramic output capacitors ≥0.47 μF.
Technical Context
The TPS71523DCKRM3 implements a CMOS-based pass transistor architecture with internal bandgap reference (1.205 V) and leakage-null control circuitry active under high-VIN/low-IOUT conditions. Its dropout behavior scales linearly with load current due to RDS(ON)-dominated conduction.
It operates in three functional modes: normal regulation (VIN > VOUT + VDO), dropout (VIN < VOUT + VDO, output tracks input), and overcurrent-limited (brick-wall ICL = 125–350 mA depending on chip version). Internal soft-start limits inrush current during startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.3 V ±4% - enables direct replacement of legacy 2.3-V logic rails without external feedback components. |
| Max Input Voltage | 24 V (legacy chip) / 30 V (new chip M3) - supports wide-range industrial supplies including 24-V DC bus and Li-ion stacks. |
| Quiescent Current | 3.2 μA typical across 0–50 mA load - sustains multi-year battery life in always-on IoT sensors. |
| Dropout Voltage | 415 mV typical at 50 mA - allows regulation from 2.715 V input to maintain 2.3 V output under full load. |
| Output Capacitance | ≥0.47 μF ceramic - eliminates need for tantalum or electrolytic capacitors; compatible with 0402/0603 MLCCs. |
| Operating Temp | –40°C to +125°C junction - qualified for under-hood automotive modules and industrial motor controllers. |
| Current Limit | 125–350 mA (M3 version) - provides robust short-circuit protection without external current-sense circuitry. |
Pinout & Package
TPS71523DCKRM3 uses the 5-pin SC70 (DCK) package, measuring 2.00 mm × 1.25 mm, with exposed pad for thermal enhancement. Pin 3 (NC) is unconnected internally and may be grounded for improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No-connect | Internally floating; grounding improves thermal resistance by ~40°C/W (RθJB drops from 84.6 to 40.7°C/W). |
| 2 (GND) | Ground reference | Primary return path for regulator bias and load current; must be low-impedance connection to system ground plane. |
| 3 (NC) | No-connect | Same as Pin 1; no electrical function; grounding recommended for thermal management. |
| 4 (IN) | Input supply | Accepts 2.5–24 V (or 30 V for M3); requires ≥0.1 μF ceramic bypass capacitor close to pin. |
| 5 (OUT) | Regulated output | Delivers stable 2.3 V; requires ≥0.47 μF ceramic output capacitor with effective value maintained after derating. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 3.2 μA typical over full 0–50 mA load range - enables >10-year runtime on CR2032 coin cell in sleep-mode sensor nodes. |
| Wide VIN range | 2.5 V to 24 V (30 V max for M3) - accommodates single-cell LiFePO₄ (2.5–3.6 V) up to industrial 24-V rail without pre-regulation. |
| Stable with small COUT | 0.47 μF minimum ceramic - reduces BOM count and PCB area vs. traditional LDOs requiring ≥10 μF tantalum. |
| Internal soft-start | Controlled ramp-up of output voltage - prevents inrush-induced brownout in downstream logic during power-up. |
| Overcurrent protection | Brick-wall current limit (125–350 mA) - protects pass transistor during output shorts without external foldback circuitry. |
Applications
| Industrial Sensor Node | Smart Metering Module |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity sensor operating in remote utility cabinets with 10+ year lifespan requirement. IC Role / Device Role / Timing Role: Primary 2.3-V supply for MSP430FR2355 MCU and analog front-end, enabling ultra-low-power sleep mode. Use Value: 3.2 μA quiescent current extends CR2032 battery life beyond 12 years while maintaining regulation across –25°C to +70°C ambient. |
Use Scenario: Sub-metering unit inside residential electricity meter, powered from harvested energy or backup capacitor. IC Role / Device Role / Timing Role: Stable 2.3-V rail for real-time clock (RTC), metrology ADC, and secure element IC. Use Value: Wide 2.5–24 V input range accepts variable harvested voltage; 125–350 mA current limit prevents latch-up during transient surges. |
| Medical Wearable | Building Automation Controller |
|
Use Scenario: Disposable ECG patch with Bluetooth LE connectivity and 3-month battery life target. IC Role / Device Role / Timing Role: Power source for ultra-low-power BLE SoC (e.g., nRF52832) and analog signal chain. Use Value: 0.47 μF ceramic output capacitor enables compact 2-layer PCB design; 125°C junction rating supports sterilization cycles. |
Use Scenario: Wireless HVAC controller mounted behind wall plates, powered from 24-VAC rectified supply. IC Role / Device Role / Timing Role: Local 2.3-V regulator for Zigbee radio, MCU, and environmental sensors. Use Value: 30-V absolute max input withstands 24-VAC transients; –40°C to +125°C rating ensures reliability in attic or basement installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-quiescent-current LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS71533DCKRM3 | Fixed 3.3-V output; identical package, pinout, and quiescent current (3.2 μA). | Used where system requires 3.3-V logic instead of 2.3-V; same thermal and layout footprint. | Select when output voltage matches existing 3.3-V rail requirements; no PCB changes needed. |
| MCP1702T-2302E/MB | 2.3-V fixed output, 2.5-µA IQ, SOT-23-5 package; lower dropout (370 mV @ 250 mA) but rated only to 100 mA. | Higher current capability suits higher-load peripherals; SOT-23-5 footprint differs from SC70-5. | Choose for cost-sensitive designs needing >50 mA; requires PCB redesign due to larger package and different pin mapping. |
Compared with TPS71523DCKRM3, TPS71533DCKRM3 offers identical performance at 3.3 V with zero layout impact, while MCP1702T-2302E/MB provides higher output current but demands board rework and lacks the 30-V M3-rated input voltage margin.
Availability
TPS71523DCKRM3 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering modules, and medical wearables requiring stable component supply with long-term lifecycle assurance.
Supply support for TPS71523DCKRM3 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of LDO design heritage and automotive-grade process validation.
The TPS715 family targets ultra-low-power, wide-input-voltage applications such as battery-operated instrumentation, industrial automation, and energy-harvesting systems where micropower efficiency and ruggedness are critical.
FAQ
What is the maximum input voltage rating for TPS71523DCKRM3?
The TPS71523DCKRM3 is an M3-version device with a maximum input voltage rating of 30 V, as specified in the December 2022 revision (SLVS338T) of the official datasheet. This exceeds the 24 V limit of legacy TPS715 chips and supports transient-tolerant designs in 24-V industrial systems. Always observe absolute maximum ratings to avoid permanent damage.
Does TPS71523DCKRM3 require an external feedback network?
No, TPS71523DCKRM3 is a fixed-output 2.3-V regulator and does not require external feedback resistors. Its internal voltage reference and error amplifier are trimmed to deliver 2.3 V ±4% across temperature and load. The FB pin is absent - this part uses the fixed-output pin configuration (Pins 1 and 3 are NC, Pin 5 is OUT).
What output capacitor value is required for stable operation of TPS71523DCKRM3?
TPS71523DCKRM3 requires a minimum effective output capacitance of 0.47 μF, which must be maintained after derating (e.g., a 1.0 μF X7R ceramic capacitor rated at 10 V meets this requirement). Stability is guaranteed with any ceramic capacitor ≥0.47 μF; tantalum or electrolytic types are unnecessary and discouraged.
How does the quiescent current of TPS71523DCKRM3 behave across load and temperature?
TPS71523DCKRM3 maintains 3.2 μA typical quiescent current across the full 0–50 mA load range and from –40°C to +125°C junction temperature. Measured data shows variation from 3.2 μA to 4.3 μA (max) over temperature and load, making it exceptionally stable for battery-life-critical applications.
Is TPS71523DCKRM3 pin-compatible with other TPS715 fixed-output variants?
Yes, all fixed-output TPS715 variants in the DCK (SC70-5) package - including TPS71518, TPS71525, TPS71530, and TPS71533 - share identical pinout: Pin 1 (NC), Pin 2 (GND), Pin 3 (NC), Pin 4 (IN), Pin 5 (OUT). This enables voltage-scaling flexibility without PCB redesign when using TPS71523DCKRM3.
TPS71523DCKRM3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 2.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.75V @ 50mA
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 4.8 µA
- Current - Supply (Max):
- 5.8 µA
- PSRR:
- 60dB (100kHz)
- Control Features:
- -
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TPS71523DCKRM3 FAQ
1.How can I place an order for TPS71523DCKRM3 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS71523DCKRM3 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 TPS71523DCKRM3 reliable?
The price and inventory of TPS71523DCKRM3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS71523DCKRM3 is usually 5 days.
3.What payment methods are accepted for TPS71523DCKRM3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS71523DCKRM3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS71523DCKRM3?
TPS71523DCKRM3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS71523DCKRM3 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 TPS71523DCKRM3?
For technical support, including TPS71523DCKRM3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS71523DCKRM3 requirements.
6.How does Aetrix verify that TPS71523DCKRM3 is sourced from the original manufacturer or authorized distributors?
All TPS71523DCKRM3 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 TPS71523DCKRM3 meets industry standards.
7.What is the process for return or replacement of TPS71523DCKRM3?
All TPS71523DCKRM3 units undergo pre-shipment inspection (PSI). If there is an issue with TPS71523DCKRM3, 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 TPS71523DCKRM3 part is unused and in its original packaging.
Return procedure for TPS71523DCKRM3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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