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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

STMicroelectronics ST715PU25R

Name: ST715PU25R
Brand: STMicroelectronics
SKU: ST715PU25R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ST715PU25R

Manufacturer:: STMicroelectronics

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 8-VDFN Exposed Pad

Datasheet:: ST715PU25R.pdf

Description:: IC REG LINEAR 2.5V 85MA 8DFN

Quantity:: RFQ Add To RFQ list

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Inventory:304

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Product details

Overview

ST715PU25R from STMicroelectronics is a fixed-output 2.5 V, 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 voltage at full load and ±5% output voltage accuracy over –40 °C to 125 °C. It supports ceramic output capacitors as low as 0.47 µF and integrates short-circuit current limiting and thermal protection - used in battery-powered portable electronics requiring long standby life.

For engineers reviewing the ST715PU25R datasheet, ST715PU25R pinout, ST715PU25R application, or ST715PU25R equivalent, key selection criteria include input voltage range compatibility, quiescent current under load, dropout behavior at 85 mA, thermal resistance of the SOT23-5L package, and stability with small ceramic capacitors in space-constrained designs.

Technical Context

The ST715PU25R implements a bandgap reference-based error amplifier driving a P-channel pass transistor, enabling low dropout and stable regulation across wide input voltage swings. Its internal current limit (~120 mA at 3.8 V input) and thermal shutdown operate independently of external components.

It requires no external feedback network (fixed 2.5 V version), eliminating resistor tolerance errors and simplifying layout. The device achieves 38 dB PSRR at 1 kHz and 57 dB at 100 kHz while maintaining 210 µV_RMS output noise (200 Hz–100 kHz) with 10 µF ceramic output capacitance.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.5 V ±5% over full temperature and load range - ensures predictable rail generation without external resistors.
Input Voltage Range	2.5 V to 24 V DC - supports direct connection to 9 V/12 V batteries, industrial rails, or unregulated wall adapters.
Max Output Current	85 mA guaranteed - sufficient for powering microcontrollers, sensors, or RF modules in portable systems.
Quiescent Current	3.8 µA typical at full load - enables >1-year battery life in always-on IoT nodes using a 200 mAh coin cell.
Dropout Voltage	500 mV typical at 85 mA - allows regulation down to VIN = 3.0 V while sustaining 2.5 V output.
Thermal Resistance (θ_JA)	195 °C/W (SOT23-5L) - limits max power dissipation to ~450 mW at 25 °C ambient before derating.
Stability Capacitor	0.47 µF to 10 µF ceramic - enables compact, low-ESR output filtering without tantalum or electrolytic parts.

Pinout & Package

ST715PU25R is packaged in SOT23-5L - a 5-pin, surface-mount, lead-free, RoHS-compliant package with 1.9 mm × 2.9 mm footprint and 1.3 mm height. Pin 1 is marked with a dot; pin numbering follows standard top-view convention.

Pin/Terminal	Circuit Role	Design Meaning
IN (Pin 4)	Input voltage supply	Accepts 2.5–24 V; requires local 0.1 µF bypass capacitor to GND for transient immunity.
GND (Pin 2)	Power ground reference	Low-impedance return path for load current and internal bias; must be connected directly to PCB ground plane.
OUT (Pin 5)	Regulated output	Delivers stable 2.5 V; connects to load and output capacitor (≥0.47 µF ceramic).
NC (Pins 1, 3)	No internal connection	Not bonded; may be left floating or tied to GND for mechanical stability - no electrical function.
FB (Pin 1 - adjustable version only)	Feedback input	Not used on ST715PU25R (fixed version); internally connected to set 2.5 V output - not accessible.

Key Features

Feature	Design Value
Ultra-low I_Q	3.8 µA typ. at 85 mA load enables multi-year operation from primary lithium cells in remote sensors.
Wide input range	2.5–24 V operation eliminates need for pre-regulation stages in mixed-voltage industrial subsystems.
Ceramic-capacitor compatible	Stable with 0.47 µF–10 µF X7R ceramics - reduces board area, cost, and aging drift vs. tantalum alternatives.
Integrated protection	Current limit (~120 mA) and thermal shutdown prevent damage during overload or poor heatsinking conditions.
High-temperature rating	–40 °C to +125 °C junction range supports deployment in automotive engine bays and industrial control cabinets.

Applications

Portable Medical Sensors

Industrial PLC I/O Modules

Use Scenario: Wearable ECG patch powered by CR2032 coin cell, operating continuously for >18 months.

IC Role / Device Role / Timing Role: Primary 2.5 V supply for analog front-end and ultra-low-power MCU.

Use Value: 3.8 µA quiescent current extends battery life; 500 mV dropout preserves regulation until battery drops to 3.0 V.

Use Scenario: DIN-rail mounted sensor interface module receiving 24 V DC from factory power bus.

IC Role / Device Role / Timing Role: Local 2.5 V rail for precision ADC reference and signal conditioning circuitry.

Use Value: 24 V input capability avoids intermediate buck stage; ±5% output accuracy meets 12-bit ADC reference tolerance.

Smart Meter Battery Backup

Automotive Body Control Unit

Use Scenario: Lithium-thionyl chloride backup supply powering real-time clock and SRAM during main power loss.

IC Role / Device Role / Timing Role: Always-on 2.5 V regulator maintaining timekeeping and memory retention.

Use Value: Sub-µA effective I_Q minimizes self-discharge; -40 °C to 125 °C rating ensures reliability across seasonal extremes.

Use Scenario: Interior lighting control module exposed to under-hood temperature cycling in parked vehicles.

IC Role / Device Role / Timing Role: Powering CAN transceiver bias and microcontroller core logic.

Use Value: Thermal shutdown prevents latch-up during sustained 125 °C ambient; SOT23-5L footprint fits tight PCB layouts.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Torex XC6206P252MR	2.5 V fixed, 80 mA max, 12 µA I_Q, SOT23-5 - higher quiescent current, lower current rating.	Suitable for cost-sensitive consumer devices where 12 µA I_Q is acceptable and load stays ≤80 mA.	Select when BOM cost is prioritized over battery life and peak current margin.
Diodes Inc. AP7361-25SG-7	2.5 V fixed, 300 mA max, 50 µA I_Q, SOT23-5 - higher current, significantly higher I_Q, same package.	Better for pulsed-load applications (e.g., BLE radio bursts) but unsuitable for multi-year battery use.	Select when dynamic load current exceeds 85 mA and thermal design accommodates higher dissipation.

Compared with XC6206P252MR and AP7361-25SG-7, ST715PU25R uniquely balances ultra-low I_Q, 85 mA capability, and 24 V input tolerance - making it optimal for long-life, wide-input, medium-current embedded systems where efficiency and thermal headroom are jointly constrained.

Availability

ST715PU25R is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter battery backup circuits, and automotive body control units requiring stable component supply across extended product lifecycles.

Supply support for ST715PU25R 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 chips for industrial, automotive, and consumer markets.

The ST715 series targets ultra-low-power, high-input-voltage LDO applications in battery-operated and harsh-environment electronics - emphasizing quiescent current optimization, wide VIN tolerance, and robustness without external compensation.

FAQ

What is the minimum input voltage required for ST715PU25R to regulate 2.5 V output?

The ST715PU25R requires a minimum input voltage of 2.5 V to maintain regulation. However, due to its 500 mV typical dropout at 85 mA, reliable 2.5 V output delivery begins at VIN ≥ 3.0 V under full load. At light loads (<1 mA), regulation starts closer to 2.55 V, per datasheet Figure 7.

Can ST715PU25R be used with a 0.22 µF ceramic output capacitor?

No - the ST715PU25R requires a minimum output capacitance of 0.47 µF ceramic (X5R/X7R) for guaranteed stability, as specified in Section 5.1 and Figure 9 of DS5704 Rev 16. Using 0.22 µF risks oscillation or poor transient response, especially under load steps.

Does ST715PU25R have an enable (EN) pin?

No - ST715PU25R has no enable pin. It operates continuously when VIN is within specification. For controlled startup, external MOSFET switching on the IN rail or use of the adjustable ST715MR (with FB pin) is required - neither is supported natively on this fixed-voltage variant.

Is ST715PU25R pin-compatible with other ST715 variants like ST715M25R?

Yes - all ST715 fixed-output variants (e.g., ST715M25R, ST715PU25R, ST715C25R) share identical SOT23-5L pinout, thermal characteristics, and electrical behavior except for marking and output voltage tolerance binning. ST715PU25R uses the "71525" top-side marking and is rated for ±5% V_OUT.

ST715PU25R 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:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 24V

Voltage - Output (Min/Fixed):: 2.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 1V @ 85mA

Current - Output:: 85mA

Current - Quiescent (Iq):: 5.5 µA

Current - Supply (Max):: 6.5 µA

PSRR:: 57dB ~ 38dB (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)

ST715PU25R FAQ

1.How can I place an order for ST715PU25R through Aetrix?

Please submit a Request for Quotation (RFQ) for ST715PU25R 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 ST715PU25R reliable?

The price and inventory of ST715PU25R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST715PU25R is usually 5 days.

3.What payment methods are accepted for ST715PU25R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST715PU25R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ST715PU25R?

ST715PU25R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ST715PU25R 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 ST715PU25R?

For technical support, including ST715PU25R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST715PU25R requirements.

6.How does Aetrix verify that ST715PU25R is sourced from the original manufacturer or authorized distributors?

All ST715PU25R 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 ST715PU25R meets industry standards.

7.What is the process for return or replacement of ST715PU25R?

All ST715PU25R units undergo pre-shipment inspection (PSI). If there is an issue with ST715PU25R, 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 ST715PU25R part is unused and in its original packaging.

Return procedure for ST715PU25R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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