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STMicroelectronics ST715PUR
- Part No.:
- ST715PUR
- Manufacturer:
- STMicroelectronics
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
ST715PUR.pdf
- Description:
- IC REG LINEAR POS ADJ 85MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,367
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Product details
Overview
ST715PUR from STMicroelectronics is an adjustable-output, high-input-voltage (2.5–24 V), ultra-low-quiescent-current (3.8 µA typ. at full load) LDO linear regulator delivering up to 85 mA output current with 500 mV typical dropout at full load. It supports ceramic output capacitors as low as 0.47 µF and operates across –40 °C to +125 °C for industrial battery-powered systems requiring stable low-power bias rails.
For engineers reviewing the ST715PUR datasheet, ST715PUR pinout, ST715PUR application, or ST715PUR equivalent, this page delivers verified package mapping (DFN8 3×3 mm), confirmed feedback-based output adjustment (1.2–15 V), thermal protection behavior, short-circuit current limit (120 mA), and real-world noise performance (210 µVRMS).
Technical Context
The ST715PUR implements a bandgap-referenced error amplifier driving a PNP pass transistor, enabling operation down to 2.5 V input while maintaining regulation up to 24 V. Its internal current limit (~120 mA) and thermal shutdown protect against sustained overloads without external circuitry.
Feedback architecture uses a precision 1.245 V (typ.) reference at the FB pin, allowing output voltage setting via external resistor divider (R1/R2). Stability is guaranteed with 0.47–10 µF ceramic output capacitors - no ESR requirements - simplifying layout in space-constrained portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 24 V DC - supports direct connection to 12 V/24 V industrial buses or multi-cell Li-ion packs without pre-regulation. |
| Output Current | 85 mA guaranteed - sufficient for powering microcontrollers, sensors, or RF modules in always-on edge nodes. |
| Quiescent Current | 3.8 µA typical at full load - enables >10-year battery life in coin-cell–powered IoT endpoints with periodic wake-up. |
| Dropout Voltage | 500 mV typical at 85 mA - allows 3.3 V output from 3.8 V input, preserving headroom in low-voltage battery discharge profiles. |
| Output Noise | 210 µVRMS (200 Hz–100 kHz) - low enough for analog sensor signal chains and ADC reference supplies without added filtering. |
| Supply Rejection | 38 dB @ 1 kHz, 57 dB @ 100 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Resistance | 52 °C/W (DFN8) - enables 1.5 W dissipation at 25 °C ambient before reaching 125 °C junction limit. |
Pinout & Package
ST715PUR is supplied in DFN8 (3 × 3 mm) package with wettable flanks, optimized for automated optical inspection and thermal performance. The exposed pad must be left floating or connected to GND per datasheet guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input voltage supply | Accepts 2.5–24 V; requires ≥0.1 µF local bypass capacitor to minimize input ripple coupling. |
| NC (Pins 2,3,5,6,7) | No internal connection | Must remain unconnected; no pull-up/down or routing required - reduces layout complexity. |
| GND (Pin 4) | Power ground reference | Primary return path for load current and internal bias; connects directly to thermal pad for heat dissipation. |
| FB (Pin 5) | Feedback input | Senses output voltage via resistor divider; sets VOUT = 1.245 V × (1 + R1/R2); high-impedance node (50 nA bias). |
| OUT (Pin 8) | Regulated output | Delivers adjustable 1.2–15 V output; stable with 0.47–10 µF ceramic capacitors - no tantalum or electrolytic needed. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ operation | 3.8 µA typical at 85 mA load - minimizes standby power loss in battery-backed real-time clocks and memory retention circuits. |
| Ceramic capacitor compatibility | Stable with 0.47 µF minimum COUT - eliminates ESR constraints and enables use of small, reliable, low-ESL MLCCs. |
| Integrated protection | Current limit (120 mA) + thermal shutdown - prevents damage during output short or overload without external foldback circuitry. |
| Wide temperature range | –40 °C to +125 °C operation - qualified for under-hood automotive sensors and industrial PLC I/O modules. |
| Adjustable output | 1.2 V to 15 V via FB pin - replaces multiple fixed-voltage variants, reducing BOM count in multi-rail designs. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Battery-powered wireless temperature/humidity sensor with BLE MCU and analog front-end. IC Role / Device Role / Timing Role: Primary bias regulator supplying 3.3 V to MCU and 2.5 V to ADC reference via resistor divider on FB pin. Use Value: 3.8 µA quiescent current extends CR2032 battery life beyond 5 years in sleep mode; 500 mV dropout sustains regulation until battery drops to 3.8 V. |
Use Scenario: Handheld pulse oximeter using rechargeable Li-ion and low-noise analog signal chain. IC Role / Device Role / Timing Role: Low-noise post-regulator for photodiode amplifier and 24-bit sigma-delta ADC reference. Use Value: 210 µVRMS output noise avoids degrading ENOB; ceramic capacitor compatibility eliminates electrolytic aging concerns in medical-grade design. |
| Smart Meter Auxiliary Rail | Automotive Body Control Module |
|
Use Scenario: Secondary 5 V rail in electricity meter powered by 24 V AC/DC adapter or supercapacitor backup. IC Role / Device Role / Timing Role: High-voltage tolerant LDO generating clean 5 V for RTC, EEPROM, and communication ICs. Use Value: 24 V max input eliminates need for external Zener clamp; 125 °C rating ensures reliability in sealed meter enclosures. |
Use Scenario: Powering CAN transceiver and door-lock MCU in 12 V vehicle electrical system with load-dump transients. IC Role / Device Role / Timing Role: Post-regulator converting stabilized 12 V bus to 3.3 V for digital logic and interface ICs. Use Value: Withstands 26 V absolute max input during load dump; internal current limit protects against shorted CAN bus wiring faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B332MR-G | Fixed 3.3 V output only; 250 mV dropout at 100 mA; 1 µA IQ; SOT23-5 package. | Lacks adjustability and high-voltage input capability - suitable only for fixed-rail, low-IQ consumer devices. | Select only if output voltage is fixed at 3.3 V and input never exceeds 6 V. |
| Analog Devices ADM7172ACPZ-R7 | 20 V max input; 200 mA output; 19 µA IQ; 125 mV dropout; requires 10 µF minimum COUT. | Higher IQ and tighter tolerance but incompatible with sub-1 µF ceramics and <2.5 V inputs. | Prefer when higher output current and lower dropout are critical, and larger output capacitance is acceptable. |
Compared with XC6219B332MR-G and ADM7172ACPZ-R7, the ST715PUR uniquely balances ultra-low IQ (3.8 µA), wide 2.5–24 V input, ceramic-cap-friendly stability, and adjustable output - making it the only choice for long-life, high-voltage, space-constrained industrial sensors.
Availability
ST715PUR is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart meter auxiliary rails, and automotive body control modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for ST715PUR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and analog components for industrial, automotive, and consumer markets.
The ST715 series belongs to ST's high-voltage LDO portfolio, engineered specifically for battery-powered and industrial systems demanding ultra-low quiescent current, wide input range, and robust thermal/overcurrent protection - not general-purpose regulation.
FAQ
What output voltage range does ST715PUR support, and how is it set?
The ST715PUR supports 1.2 V to 15 V output via external resistor divider on the FB pin, using VOUT = VFB × (1 + R1/R2) where VFB = 1.245 V (typ.). R2 should be between 5 kΩ and 1 MΩ to maintain accuracy and low IQ; R1 is calculated accordingly. No internal resistors are present - full adjustability requires two external components.
Can ST715PUR operate with a 0.47 µF ceramic output capacitor?
Yes - the ST715PUR is explicitly characterized and guaranteed stable with ceramic output capacitors from 0.47 µF to 10 µF, including X5R/X7R types. Unlike many LDOs, it imposes no minimum ESR requirement, eliminating the need for tantalum or aluminum electrolytics and simplifying PCB layout in compact designs.
How does ST715PUR behave during output short-circuit conditions?
Under short-circuit, ST715PUR limits output current to ~120 mA (measured at VIN = 3.8 V) and activates thermal shutdown if junction temperature exceeds 125 °C. It does not latch off - recovery occurs automatically once fault clears and temperature falls below threshold, enabling self-protecting operation in intermittent fault environments.
Is the DFN8 (3×3 mm) package of ST715PUR RoHS-compliant and halogen-free?
Yes - STMicroelectronics manufactures the ST715PUR in ECOPACK2-compliant DFN8 packages, meeting RoHS Directive 2011/65/EU and EU REACH Regulation (EC) No. 1907/2006. Full material declarations and halogen-free status (≤900 ppm Cl + Br) are documented in ST's official ECOPACK reports available at www.st.com/ecopack.
ST715PUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 23V
- Voltage Dropout (Max):
- 1V @ 85mA
- Current - Output:
- 85mA
- Current - Quiescent (Iq):
- 5.5 µA
- Current - Supply (Max):
- 6.5 µA
- PSRR:
- 62dB ~ 45dB (100kHz ~ 1kHz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
ST715PUR FAQ
1.How can I place an order for ST715PUR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST715PUR 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 ST715PUR reliable?
The price and inventory of ST715PUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST715PUR is usually 5 days.
3.What payment methods are accepted for ST715PUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST715PUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST715PUR?
ST715PUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST715PUR 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 ST715PUR?
For technical support, including ST715PUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST715PUR requirements.
6.How does Aetrix verify that ST715PUR is sourced from the original manufacturer or authorized distributors?
All ST715PUR 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 ST715PUR meets industry standards.
7.What is the process for return or replacement of ST715PUR?
All ST715PUR units undergo pre-shipment inspection (PSI). If there is an issue with ST715PUR, 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 ST715PUR part is unused and in its original packaging.
Return procedure for ST715PUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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