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Texas Instruments TPS71523DCKR
- Part No.:
- TPS71523DCKR
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TPS71523DCKR.pdf
- Description:
- IC REG LINEAR 2.3V 50MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,302
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Product details
Overview
TPS71523DCKR from Texas Instruments is a fixed-output 2.3-V, 50-mA low-dropout linear regulator with 3.2-μA quiescent current, stable with ≥0.47-μF output capacitance, and rated for –40°C to +125°C junction temperature in SC70-5 package. It delivers ultra-low IQ across full load range (0–50 mA), supports input voltages from 2.5 V to 24 V, and features overcurrent protection and internal soft-start-ideal for battery-powered microcontroller power rails in industrial sensing nodes.
For engineers reviewing the TPS71523DCKR datasheet, TPS71523DCKR pinout, TPS71523DCKR application, or TPS71523DCKR equivalent, key selection criteria include dropout voltage at 50 mA (415 mV typ), input voltage headroom tolerance, thermal performance in SC70 (RθJB = 40.7°C/W for new chip), and compatibility with low-ESR ceramic output capacitors ≥0.47 μF.
Technical Context
The TPS71523DCKR implements a CMOS-based pass transistor architecture with a 1.205-V internal bandgap reference and leakage-null control circuit active under light-load/high-voltage/temperature conditions. Its dropout behavior follows RDS(ON)-scaled voltage drop, delivering 415 mV typical at 50 mA and maintaining regulation down to VIN = VOUT + VDO.
It operates in three functional modes: normal regulation (VIN > VOUT + VDO, IOUT < ICL), dropout (VIN < VOUT + VDO, IOUT < ICL), and current-limited fault state (IOUT = ICL ≈ 125–350 mA). Internal soft-start limits inrush current during startup, while overcurrent protection engages as a brick-wall limiter without thermal shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 2.3 V ±4% accuracy across –40°C to +125°C, enabling direct replacement of legacy 2.3-V logic or analog supply rails. |
| Max output current | 50 mA continuous-sufficient for MSP430, STM32L, or similar ultra-low-power MCUs and sensor interfaces. |
| Quiescent current | 3.2 μA typical over 0–50 mA load and –40°C to +125°C-preserves battery life in multi-year IoT endpoint deployments. |
| Dropout voltage | 415 mV typical at 50 mA-allows operation from single Li-ion (3.0 V min) or 5-V rail with ≥2.715 V headroom. |
| Input voltage range | 2.5 V to 24 V (30 V absolute max for new chip)-supports wide-input industrial supplies, 12-V bus derivatives, and battery-backed systems. |
| Stability condition | Stable with ≥0.47 μF ceramic output capacitor-enables compact, low-BOM-count designs without tantalum or polymer caps. |
| Thermal resistance | RθJB = 40.7°C/W (new chip)-permits 350 mW dissipation at 40°C ambient before reaching 125°C junction limit in standard PCB layout. |
Pinout & Package
TPS71523DCKR uses the 5-pin SC70 (DCK) package, measuring 2.00 mm × 1.25 mm, with exposed pad not electrically connected. Thermal performance relies on PCB copper area under the package body and proper grounding of NC pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No-connect | Internally unconnected; tie to GND for improved thermal conduction and EMI suppression-no electrical function. |
| 2 (GND) | Ground reference | Primary return path for IN, OUT, and internal bias; must be low-impedance connection to minimize noise and dropout error. |
| 3 (NC) | No-connect | Internally unconnected; tie to GND for thermal enhancement-no signal or power role. |
| 4 (IN) | Input supply | Accepts 2.5–24 V; requires ≥0.1-μF ceramic decoupling close to pin to suppress source impedance-induced instability. |
| 5 (OUT) | Regulated output | Delivers stable 2.3 V; requires ≥0.47-μF ceramic capacitor to ground for loop stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 3.2 μA typical across full 0–50 mA load range and –40°C to +125°C-enables >10-year battery life in always-on sensors. |
| Wide input voltage support | Operates from 2.5 V up to 24 V (30 V abs max)-eliminates need for pre-regulation in 12-V or 24-V industrial systems. |
| Low-dropout architecture | 415 mV dropout at 50 mA enables use with single-cell Li-ion (3.0 V min) or partially discharged alkaline stacks. |
| Internal soft-start | Controls output ramp rate to limit inrush into downstream capacitance-prevents input rail sag and system brownouts. |
| Overcurrent protection | Brick-wall current limit (~125–350 mA depending on chip revision) protects against short-circuit faults without latch-up or thermal shutdown. |
Applications
| Home and building automation | Retail automation and payment |
|---|---|
Use Scenario: Battery-powered wireless occupancy sensors and smart thermostats operating on coin cells or AA batteries. IC Role / Device Role / Timing Role: Primary 2.3-V supply for MSP430FR2355 MCU and RF transceiver, enabling deep-sleep current <1 μA. Use Value: 3.2-μA quiescent current extends battery life beyond 5 years; SC70 footprint minimizes PCB area in space-constrained wall-mount enclosures. | Use Scenario: Compact handheld barcode scanners powered by rechargeable Li-ion packs with variable voltage (3.0–4.2 V). IC Role / Device Role / Timing Role: Post-regulator delivering clean 2.3-V rail to image sensor and decode ASIC, rejecting ripple from switching charger ICs. Use Value: 60-dB PSRR at 100 kHz suppresses charger noise; 415-mV dropout ensures regulation down to 2.715 V input during battery discharge. |
| Grid infrastructure | Medical applications |
Use Scenario: Remote current/voltage monitoring units deployed on utility poles with wide-temperature (-40°C to +85°C) operation. IC Role / Device Role / Timing Role: Powering isolated ADC front-end and low-power Cortex-M0+ processor from 12-V DC auxiliary supply. Use Value: –40°C to +125°C rating ensures reliability in sealed outdoor enclosures; 24-V input tolerance accommodates surges on distribution lines. | Use Scenario: Portable patient monitors using AAA batteries, requiring long runtime and low EMI emissions near sensitive analog front-ends. IC Role / Device Role / Timing Role: Clean 2.3-V supply for ECG analog signal chain and Bluetooth LE radio, minimizing noise coupling into biopotential measurements. Use Value: 425-μVrms output noise (new chip) and 0.47-μF stability reduce post-regulation filtering; SC70 size aids miniaturization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS71533DCKR | Fixed 3.3-V output; identical package, quiescent current, and input range-only output voltage differs. | Used where system requires 3.3-V logic supply instead of 2.3-V analog/reference rail. | Select when target voltage matches 3.3 V; no layout change needed but verify downstream voltage tolerance. |
| MCP1703T-2302E/MB | 2.3-V fixed output, 250-mA rating, 3.5-μA IQ, SOT-23-5 package-higher current, larger footprint, slightly higher IQ. | Suitable for higher-current peripherals (e.g., display drivers) where SC70 size constraint is relaxed. | Choose when >50 mA load or better thermal margin is required; requires PCB redesign due to SOT-23-5 vs SC70-5 footprint mismatch. |
Compared with TPS71533DCKR, the TPS71523DCKR provides identical performance at 2.3 V-critical for precision analog biasing-while the MCP1703T-2302E/MB trades SC70 miniaturization for higher current capability and different thermal characteristics.
Availability
TPS71523DCKR is available at Aetrix Electronics and suitable for home automation, grid infrastructure, and portable medical devices requiring stable component supply with long lifecycle assurance and consistent parametric performance across production batches.
Supply support for TPS71523DCKR 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 connectivity technologies, with decades of LDO design heritage and broad industrial qualification.
The TPS715 family targets ultra-low-power, wide-input-voltage applications-including battery-powered sensors, metering, and industrial IoT-where quiescent current, thermal efficiency, and small-footprint reliability are critical.
FAQ
What is the maximum input voltage rating for the TPS71523DCKR?
The TPS71523DCKR supports up to 24 V under recommended operating conditions. Its absolute maximum input voltage is 30 V for the new-chip revision (as specified in the December 2022 datasheet revision T), making it suitable for transient-tolerant industrial 24-V systems. Exceeding 30 V risks permanent damage per Absolute Maximum Ratings.
Does the TPS71523DCKR require an external feedback resistor network?
No, the TPS71523DCKR is a fixed-output variant and does not use the FB pin. Its output is internally set to 2.3 V. The FB pin is not present in the fixed-version pinout-pins 1 and 3 are NC, pin 2 is GND, pin 4 is IN, and pin 5 is OUT. External resistors are only required for adjustable versions like TPS71501.
What output capacitor value is mandatory for stable operation of the TPS71523DCKR?
The TPS71523DCKR requires a minimum effective output capacitance of 0.47 μF, with ceramic dielectric strongly recommended. The datasheet specifies that nominal capacitor values must derate by 50%, so a 1-μF X7R ceramic capacitor (guaranteeing ≥0.5 μF effective capacitance at bias and temperature) meets the requirement and ensures robust transient response and phase margin.
How does the TPS71523DCKR behave during thermal overload?
The TPS71523DCKR does not include thermal shutdown protection. Under sustained overload (e.g., high IOUT at elevated ambient), junction temperature rises per RθJB = 40.7°C/W. If TJ exceeds 150°C (absolute max), permanent damage may occur. Designers must ensure power dissipation [(VIN – 2.3 V) × IOUT] stays within safe limits using adequate PCB copper and ambient derating.
Is the TPS71523DCKR compatible with lead-free reflow soldering processes?
Yes, the TPS71523DCKR is RoHS-compliant and qualified for standard Pb-free reflow profiles, including JEDEC J-STD-020D. Its SC70-5 package has a moisture sensitivity level (MSL) of 1, meaning it can be stored indefinitely at ≤30°C/85% RH without baking prior to assembly-simplifying manufacturing logistics for high-reliability production.
TPS71523DCKR 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):
- 4.2 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (100kHz)
- Control Features:
- -
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TPS71523DCKR FAQ
1.How can I place an order for TPS71523DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS71523DCKR 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 TPS71523DCKR reliable?
The price and inventory of TPS71523DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS71523DCKR is usually 5 days.
3.What payment methods are accepted for TPS71523DCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS71523DCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS71523DCKR?
TPS71523DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS71523DCKR 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 TPS71523DCKR?
For technical support, including TPS71523DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS71523DCKR requirements.
6.How does Aetrix verify that TPS71523DCKR is sourced from the original manufacturer or authorized distributors?
All TPS71523DCKR 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 TPS71523DCKR meets industry standards.
7.What is the process for return or replacement of TPS71523DCKR?
All TPS71523DCKR units undergo pre-shipment inspection (PSI). If there is an issue with TPS71523DCKR, 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 TPS71523DCKR part is unused and in its original packaging.
Return procedure for TPS71523DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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