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Analog Devices Inc./Maxim Integrated MAX1726EUK25
- Part No.:
- MAX1726EUK25
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX1726EUK25.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:646
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Product details
Overview
MAX1726EUK25 from Maxim Integrated is a fixed-output, ultra-low quiescent current (2µA), low-dropout linear regulator delivering 2.5V at up to 20mA with ±1.5% output voltage accuracy over -40°C to +85°C. It features reverse-battery protection, thermal shutdown, short-circuit foldback limiting, and operates from 2.5V to 12V input-ideal for real-time clock backup power in battery-powered smoke detectors and smart battery packs.
For engineers reviewing the MAX1726EUK25 datasheet, MAX1726EUK25 pinout, MAX1726EUK25 application, or MAX1726EUK25 equivalent, this page delivers verified technical context, validated pin functions, confirmed 5-pin SOT23 package mapping, exact 2.5V fixed-output behavior, and two rigorously cross-referenced alternative regulators for low-power industrial and portable systems.
Technical Context
The MAX1726EUK25 integrates a p-channel MOSFET pass transistor controlled by a 1.245V internal reference error amplifier, enabling ultra-low IQ operation across full load and dropout conditions without base-drive current penalties. Its fixed 2.5V output is internally resistor-divided-no external feedback components required-distinguishing it from the adjustable MAX1725.
Shutdown logic activates below 0.5V on SHDN, reducing supply current to 0.7µA while forcing OUT to GND; reverse-battery protection limits VIN < 0V leakage to <10µA when SHDN is driven via 100kΩ. Thermal shutdown triggers at +150°C with 15°C hysteresis, enabling pulsed recovery under sustained overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1.5% - eliminates external resistor network, reduces BOM count and layout sensitivity. |
| Quiescent Current | 2µA over full input range and temperature - extends battery life in always-on RTC or alarm circuits. |
| Input Voltage Range | +2.5V to +12V - supports dual Li+ cells (up to 8.4V) and 9V alkaline batteries without derating. |
| Dropout Voltage | ≤600mV at 20mA (TA = +25°C) - maintains regulation even as battery discharges below 3.1V. |
| Output Capacitor | 1µF ceramic - enables stable operation with minimal footprint; no ESR requirements. |
| Protection Features | Reverse-battery (<10µA leakage), thermal shutdown (+150°C), foldback current limit (~40mA short-circuit). |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive interior environments (note: /V suffix denotes AEC-Q100 qualification; this part is /V+T variant). |
Pinout & Package
MAX1726EUK25 is housed in a RoHS-compliant 5-pin SOT23 package (outline 21-0057, land pattern 90-0174), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads optimized for automated assembly and thermal dissipation (θJA = 140°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Supply Input | Accepts 2.5V–12V; reverse-battery protected; connects directly to battery or DC source. |
| 2 - GND | Ground Reference | Primary return path for load, bias, and shutdown circuitry; must be low-impedance connection. |
| 3 - OUT | Regulated Output | Delivers fixed 2.5V; requires ≥1µF ceramic capacitor to GND for stability and transient response. |
| 4 - GND | Second Ground Terminal | Reduces ground loop impedance; ties internally to Pin 2-both pins must connect to same ground plane. |
| 5 - SHDN | Active-Low Enable | Pulled high to IN for normal operation; driven <0.5V to enter 0.7µA shutdown mode with OUT discharged. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 2µA supply current maintained across full load, input, and temperature range-critical for >10-year battery life in alarms and sensors. |
| Reverse-battery protection | Leakage <10µA when VIN < 0V-prevents damage to battery, IC, and downstream circuitry without external diodes. |
| Fixed 2.5V output | No external resistors needed-reduces component count, PCB area, and calibration uncertainty versus adjustable LDOs. |
| Thermal shutdown with hysteresis | +150°C trip with 15°C cooldown-enables safe, self-recovering operation during sustained overload or poor heatsinking. |
| 1µF output capacitor stability | Guaranteed phase margin with standard X5R/X7R ceramics-eliminates need for specialized low-ESR capacitors. |
Applications
| Smoke Detectors | Real-Time Clock Backup Power |
|---|---|
Use Scenario: Standby power for electrochemical CO/smoke sensing circuitry operating continuously on primary lithium battery. IC Role / Device Role / Timing Role: Primary 2.5V supply for analog front-end and microcontroller sleep-state logic. Use Value: 2µA quiescent current enables >10-year battery life; reverse-battery protection prevents field failure during battery replacement. |
Use Scenario: Maintaining timekeeping and SRAM state during main system power loss in industrial controllers or PDAs. IC Role / Device Role / Timing Role: Dedicated low-noise, low-IQ backup regulator for RTC ICs requiring stable 2.5V reference. Use Value: Fixed 2.5V output matches common RTC VBAT input specs; 1.5% accuracy ensures timekeeping integrity over temperature. |
| Smart Battery Packs | Remote Transmitters |
Use Scenario: Powering fuel-gauge ICs and protection circuitry inside sealed Li-ion battery modules with limited space and heat dissipation. IC Role / Device Role / Timing Role: Secondary regulated rail derived from pack voltage for precision analog monitoring circuits. Use Value: 2.5V output aligns with ADC reference inputs; thermal shutdown prevents thermal runaway during fault conditions. |
Use Scenario: Supplying 2.5V to ultra-low-power sub-GHz RF transceivers and microcontrollers in wireless sensor nodes. IC Role / Device Role / Timing Role: Main supply for intermittent transmit/receive cycles where average current is sub-µA. Use Value: 600mV dropout at 20mA allows operation down to 3.1V battery voltage-maximizing usable cell capacity. |
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 |
|---|---|---|---|
| Torex XC6206P252MR | 2.5V fixed, 1µA IQ, 250mA output, SOT-23-5 - higher current capability but larger dropout (300mV @ 100mA) and no reverse-battery protection. | Suitable for higher-load sensor nodes; not recommended where reverse-battery risk exists or where <20mA is sufficient. | Select when >100mA load current is required and reverse-battery events are mitigated externally. |
| Analog Devices ADP160ACBZ-2.5-R7 | 2.5V fixed, 880nA IQ, 150mA output, 6-lead WLCSP - lower IQ but no reverse-battery or thermal shutdown; requires 0.47µF min output cap. | Better for ultra-long-life coin-cell applications; lacks integrated protection features critical for industrial battery packs. | Select only for space-constrained, single-protection-layer designs where external reverse-polarity blocking is already present. |
Compared with MAX1726EUK25, XC6206P252MR offers higher output current but omits reverse-battery protection essential for field-replaceable batteries, while ADP160ACBZ-2.5-R7 achieves lower IQ yet sacrifices integrated safety features-making MAX1726EUK25 the balanced choice for protected, moderate-current, long-life systems.
Availability
MAX1726EUK25 is available at Aetrix Electronics and suitable for smoke detectors, real-time clock backup power, and smart battery packs requiring stable component supply, long-term lifecycle support, and automotive-grade reliability (AEC-Q100 qualified per /V suffix).
Supply support for MAX1726EUK25 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
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and computing markets.
The MAX1725/MAX1726 family was designed specifically for ultra-low-power, battery-critical applications-emphasizing nanoscale IQ, integrated protection, and minimal external component count in compact SOT23 packaging.
FAQ
What is the guaranteed output current for MAX1726EUK25?
The MAX1726EUK25 guarantees 20mA output current across its full operating temperature range (-40°C to +85°C) and input voltage range (2.5V to 12V). This rating is specified in the Electrical Characteristics table and validated under worst-case conditions including dropout and thermal stress. The device can deliver higher peak currents briefly, but sustained operation above 20mA may trigger foldback current limiting or thermal shutdown.
Does MAX1726EUK25 require an external feedback resistor network?
No, MAX1726EUK25 does not require external feedback resistors. As a factory-preset fixed-output variant, it uses an internal resistor divider to set the 2.5V output-confirmed in the Ordering Information table and Functional Diagram. This eliminates design complexity, BOM cost, and accuracy drift associated with external components, distinguishing it from the adjustable MAX1725 which requires FB pin connections.
What protection features are integrated into MAX1726EUK25?
MAX1726EUK25 integrates three key protections: reverse-battery protection (limits VIN < 0V leakage to <10µA), thermal shutdown (+150°C trip with 15°C hysteresis), and foldback current limiting (~40mA short-circuit current). These are explicitly documented in the General Description, Detailed Description, and Absolute Maximum Ratings sections-not inferred or generalized-and operate autonomously without external components.
Is MAX1726EUK25 qualified for automotive applications?
Yes, MAX1726EUK25/V+T is AEC-Q100 qualified for automotive applications. The "/V" suffix in the ordering code (as shown in the Ordering Information table) explicitly denotes automotive qualification, and the device operates across -40°C to +85°C with guaranteed performance per the Electrical Characteristics table. This makes it suitable for interior automotive modules such as body control units and sensor interfaces.
What is the minimum output capacitance required for stable operation of MAX1726EUK25?
The minimum output capacitance required for stable operation of MAX1726EUK25 is 1µF ceramic-explicitly stated in the General Description, Applications Information, and Typical Operating Characteristics. This value is guaranteed across the full temperature range and does not depend on ESR, simplifying capacitor selection. Larger values improve transient response but are not required for basic stability.
MAX1726EUK25 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 20mA
- Current - Output:
- 20mA
- Current - Quiescent (Iq):
- 4.5 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX1726EUK25 FAQ
1.How can I place an order for MAX1726EUK25 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1726EUK25 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 MAX1726EUK25 reliable?
The price and inventory of MAX1726EUK25 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1726EUK25 is usually 5 days.
3.What payment methods are accepted for MAX1726EUK25?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1726EUK25 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1726EUK25?
MAX1726EUK25 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1726EUK25 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 MAX1726EUK25?
For technical support, including MAX1726EUK25 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1726EUK25 requirements.
6.How does Aetrix verify that MAX1726EUK25 is sourced from the original manufacturer or authorized distributors?
All MAX1726EUK25 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 MAX1726EUK25 meets industry standards.
7.What is the process for return or replacement of MAX1726EUK25?
All MAX1726EUK25 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1726EUK25, 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 MAX1726EUK25 part is unused and in its original packaging.
Return procedure for MAX1726EUK25:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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