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Analog Devices Inc./Maxim Integrated MAX1616AEUK-T
- Part No.:
- MAX1616AEUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX1616AEUK-T.pdf
- Description:
- HIGH-VOLTAGE, LOW-POWER LINEAR R
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX1616AEUK-T from Maxim Integrated is an adjustable-output, high-voltage linear regulator in SOT23-5 package, delivering 1.24V to 28V output at up to 30mA with 8µA max quiescent current and 350mV dropout at 30mA load. It enables keep-alive power for microcontrollers and RTCs in notebook computers and smart-battery packs operating from 4V–28V batteries.
For engineers reviewing the MAX1616AEUK-T datasheet, MAX1616AEUK-T pinout, MAX1616AEUK-T application, or MAX1616AEUK-T equivalent, this device is selected for ultra-low-power, high-input-voltage backup regulation where thermal shutdown, foldback current limiting, and <1µA shutdown current are critical design requirements.
Technical Context
The MAX1616AEUK-T uses external resistive feedback (FB pin) to set output voltage between 1.24V and 28V, with a precise 1.240V (±2.5%) internal reference threshold. Its pass transistor architecture supports operation down to 4V input while maintaining regulation under fast line transients typical during battery-to-adapter switchover.
Shutdown is active-low on SHDN pin, reducing supply current to ≤3µA; thermal shutdown activates at +150°C with +20°C hysteresis. The SOT23-5 package provides 571mW power dissipation at +70°C ambient and relies on GND pad for thermal conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 28V - supports direct connection to high-voltage Li-ion stacks or industrial battery rails without pre-regulation. |
| Output Voltage Range | 1.24V to 28V - adjustable via external resistor divider; minimum 1.24V reference ensures stable low-voltage biasing. |
| Max Output Current | 30mA - safe continuous load limit defined by thermal limits of SOT23-5 package at +85°C ambient. |
| Quiescent Supply Current | 8µA (max) - enables multi-year battery backup for CMOS RAM or real-time clocks without significant drain. |
| Dropout Voltage | 350mV at 30mA - allows regulation even when input drops within 350mV of desired output, e.g., 5.35V → 5.0V. |
| FB Input Current | −10nA to 30nA - ultra-low bias enables high-value feedback resistors, minimizing standby current in adjustment network. |
| Thermal Shutdown Threshold | +150°C with +20°C hysteresis - prevents permanent damage during sustained overload; causes pulsating output until junction cools. |
Pinout & Package
SOT23-5 package with exposed thermal pad not electrically connected; requires PCB ground plane connection on GND pin for thermal performance. Pin 1 = IN, Pin 2 = GND, Pin 3 = FB (feedback input), Pin 4 = SHDN (active-low shutdown), Pin 5 = OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Positive input supply | Accepts 4V–28V unregulated input; must be decoupled with ≥0.1µF ceramic capacitor close to pin. |
| 2 (GND) | Ground reference and thermal path | Electrical return and primary heat conduction path; requires large copper area for 571mW dissipation capability. |
| 3 (FB) | Feedback input | Compares divided output voltage to 1.24V internal reference; connects to resistor divider node for adjustable output setting. |
| 4 (SHDN) | Active-low enable control | Pulls low to disable regulator and reduce supply current to ≤3µA; tie to IN for automatic startup on power application. |
| 5 (OUT) | Regulated output | Delivers set output voltage; requires ≥1µF (or 6.8µF for full 30mA) low-ESR (<1Ω) capacitor for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output via external resistors | Enables single BOM part to support multiple system voltages (e.g., 1.8V, 3.3V, 5V, 12V) without redesigning regulator stage. |
| 8µA max quiescent current | Extends shelf life and operational runtime in battery-backed systems-e.g., >10 years on a 200mAh coin cell powering RTC + SRAM. |
| Internal thermal shutdown with hysteresis | Prevents catastrophic failure during short-circuit or overload; self-recovery behavior avoids manual reset requirement. |
| Low-noise 5mVp-p output | Meets noise-sensitive analog supply needs (e.g., ADC reference rails) without requiring additional LDO post-regulation. |
| Foldback current limiting | Reduces power dissipation during output short circuits, enabling safe 30-second short-to-ground per Absolute Maximum Ratings. |
Applications
| CMOS/RTC Backup Power | Microcontroller Keep-Alive Supply |
|---|---|
Use Scenario: Maintaining timekeeping and volatile memory state during main power loss in portable medical devices. IC Role / Device Role / Timing Role: Always-on linear regulator providing stable 3.3V or 5V from backup lithium coin cell or supercapacitor. Use Value: 8µA quiescent current ensures >5-year backup runtime on a 47mAh CR2032; FB-adjustability allows matching exact MCU VDDIO tolerance. | Use Scenario: Powering ARM Cortex-M0+ core and SRAM during deep-sleep mode in industrial sensor nodes. IC Role / Device Role / Timing Role: Low-dropout regulator supplying regulated VCORE from 8.4V dual-cell Li-ion pack during wake-up transitions. Use Value: 350mV dropout enables usable runtime down to 3.65V input for 3.3V output; SHDN pin allows synchronized wake/sleep with MCU GPIO. |
| Notebook Computer Battery Switchover | Smart-Battery Pack Fuel-Gauge Bias |
Use Scenario: Seamless transition between AC adapter and battery power without brownout in ultrabook platforms. IC Role / Device Role / Timing Role: Secondary regulator stabilizing 5V rail for embedded controller (EC) and keyboard controller during input source switching. Use Value: Excellent line-transient response (50mV overshoot on 10mA→20mA step) prevents EC reset; 4V–28V range covers both 3S and 4S battery configurations. | Use Scenario: Providing precision bias voltage to fuel-gauge IC (e.g., MAX17048) inside sealed Li-ion battery packs. IC Role / Device Role / Timing Role: Adjustable regulator generating 2.8V or 3.0V reference for coulomb counter analog front-end. Use Value: 1.24V reference accuracy (±2.5%) and low 5mVp-p noise ensure <0.5% fuel-gauge error over temperature; SOT23-5 footprint fits tight battery PCB space constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable high-voltage linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3012BEMS#TRPBF | Higher 500mA output, 70µA quiescent current, wider 1.2V–60V input, but larger MSOP-10 package. | Supports higher-current analog subsystems (e.g., op-amp bias rails); unsuitable for space-constrained RTC backup. | Select when >30mA load or >28V input is required; avoid if ultra-low IQ or SOT23-5 footprint is mandatory. |
| TSP50C12DGKR | Fixed 3.3V/5V outputs only, 12µA IQ, 2.5V–24V input, same SOT23-5 package and pinout. | Lacks adjustability; cannot replace MAX1616AEUK-T in designs requiring non-standard output voltages. | Choose only for fixed-voltage use cases where 12µA IQ is acceptable and no FB network redesign is needed. |
Compared with LT3012BEMS#TRPBF and TSP50C12DGKR, the MAX1616AEUK-T uniquely balances ultra-low 8µA quiescent current, SOT23-5 footprint, and full 1.24V–28V adjustability-making it optimal for battery-backed microcontroller and RTC applications where board space and standby lifetime are critical.
Availability
MAX1616AEUK-T is available at Aetrix Electronics and suitable for notebook computer battery switchover circuits, smart-battery pack fuel-gauge biasing, and CMOS/RTC backup power systems requiring stable component supply across extended production lifecycles.
Supply support for MAX1616AEUK-T 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) designs precision analog, mixed-signal, and power-management ICs for industrial, automotive, communications, and computing applications.
The MAX1615/MAX1616 product line delivers micropower, high-input-voltage linear regulators specifically for always-on power domains in portable computing and battery-powered instrumentation.
FAQ
What output voltage range does the MAX1616AEUK-T support?
The MAX1616AEUK-T supports an adjustable output voltage range from 1.24V to 28V, set using an external resistor divider connected to the FB pin. Its internal 1.240V (±2.5%) reference ensures accurate regulation across temperature and load, enabling precise biasing for diverse analog and digital subsystems without requiring multiple fixed-output variants.
How does the MAX1616AEUK-T achieve ultra-low quiescent current?
The MAX1616AEUK-T achieves ≤8µA maximum quiescent current through proprietary micropower biasing circuitry and optimized transistor sizing in its bandgap reference and error amplifier. This enables multi-year operation from small backup batteries-e.g., >7 years on a 100mAh Li-SOCl₂ cell powering SRAM and RTC-without compromising line-transient response or PSRR performance.
Can the MAX1616AEUK-T replace the MAX1615EUK-T in a design?
No-the MAX1616AEUK-T cannot directly replace the MAX1615EUK-T because it lacks internal voltage-setting resistors and requires external FB divider components. The MAX1615EUK-T provides fixed 3.3V/5V outputs via pin-strapping (5/3 pin), whereas the MAX1616AEUK-T is strictly adjustable. Board-level changes to feedback network and layout are required for substitution.
What thermal protection features does the MAX1616AEUK-T include?
The MAX1616AEUK-T includes thermal-overload protection that disables the pass transistor when junction temperature exceeds +150°C, with +20°C hysteresis. This prevents permanent damage during sustained overload or poor PCB thermal design. Once cooled below +130°C, the device automatically resumes regulation-providing fault-tolerant operation without external supervision circuitry.
What are the minimum capacitor requirements for stable operation of the MAX1616AEUK-T?
The MAX1616AEUK-T requires ≥0.1µF ceramic input capacitance and ≥1µF (or 6.8µF for full 30mA loads) low-ESR (<1Ω) output capacitance. For output voltages below 3.3V, a 15µF output capacitor is recommended. These values ensure stability, minimize output ripple, and maintain adequate transient response during load steps up to 30mA.
MAX1616AEUK-T 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:
- -
- Output Type:
- -
- Number of Regulators:
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- -
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX1616AEUK-T FAQ
1.How can I place an order for MAX1616AEUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1616AEUK-T 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 MAX1616AEUK-T reliable?
The price and inventory of MAX1616AEUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1616AEUK-T is usually 5 days.
3.What payment methods are accepted for MAX1616AEUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1616AEUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1616AEUK-T?
MAX1616AEUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1616AEUK-T 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 MAX1616AEUK-T?
For technical support, including MAX1616AEUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1616AEUK-T requirements.
6.How does Aetrix verify that MAX1616AEUK-T is sourced from the original manufacturer or authorized distributors?
All MAX1616AEUK-T 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 MAX1616AEUK-T meets industry standards.
7.What is the process for return or replacement of MAX1616AEUK-T?
All MAX1616AEUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1616AEUK-T, 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 MAX1616AEUK-T part is unused and in its original packaging.
Return procedure for MAX1616AEUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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