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Analog Devices Inc./Maxim Integrated MAX1615AEUK-T
- Part No.:
- MAX1615AEUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX1615AEUK-T.pdf
- Description:
- HIGH-VOLTAGE, LOW-POWER LINEAR R
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX1615AEUK-T from Maxim Integrated is a micropower, fixed-output linear regulator in SOT23-5 package, delivering 3.3V or 5V at up to 30mA output current with 4V–28V input range, 8µA max quiescent current, and ±2% initial output accuracy. It powers CMOS RAM and microcontrollers in high-voltage battery systems such as notebook computers and smart-battery packs.
For engineers reviewing the MAX1615AEUK-T datasheet, MAX1615AEUK-T pinout, MAX1615AEUK-T application, or MAX1615AEUK-T equivalent, key selection criteria include dropout voltage (350mV @ 30mA), shutdown supply current (<1µA), thermal shutdown at +150°C, and pin-selectable output configuration for low-power keep-alive operation.
Technical Context
The MAX1615AEUK-T uses a PNP pass transistor architecture enabling low dropout and high PSRR under fast line transients, such as battery-to-AC adapter switchover. Its internal resistor divider and 5/3 pin select logic fix output to either 3.3V (5/3 = GND) or 5.0V (5/3 = OUT), eliminating external feedback components.
Shutdown is active-low on SHDN pin; pulling SHDN to GND disables regulation and reduces supply current to ≤3µA. Thermal protection engages at +150°C junction temperature with +20°C hysteresis, cycling output during sustained overload without damage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 28V - supports direct connection to high-voltage batteries without pre-regulation. |
| Output Voltage | Pin-selectable 3.3V or 5.0V - set by tying 5/3 pin to GND or OUT; no external resistors needed. |
| Max Output Current | 30mA continuous - sufficient for RTC backup, microcontroller keep-alive, and low-power logic rails. |
| Quiescent Supply Current | 8µA maximum - enables multi-year battery life in always-on CMOS RAM applications. |
| Dropout Voltage | 350mV at 30mA load - ensures regulation down to VIN = VOUT + 0.35V, critical for end-of-battery-life operation. |
| Initial Output Accuracy | ±2% over temperature - guarantees stable reference for timekeeping and low-power MCU operation. |
| Thermal Shutdown Threshold | +150°C with +20°C hysteresis - protects against PCB-level overheating during sustained overload. |
Pinout & Package
SOT23-5 package with exposed pad not electrically connected; 571mW power dissipation capability at +70°C ambient; thermal resistance θJA = 81°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Positive Input Supply | Accepts 4V–28V unregulated input; connects directly to battery or adapter rail. |
| 2 GND | Ground Reference & Thermal Path | Provides return path and conducts heat to PCB ground plane; must be soldered to large copper area. |
| 3 OUT | Regulated Output | Delivers fixed 3.3V or 5.0V; requires ≥1µF output capacitor (4.7µF recommended for full 30mA load). |
| 4 5/3 | Output Voltage Select | Connect to GND for 3.3V output; connect to OUT for 5.0V output - determines internal feedback ratio. |
| 5 SHDN | Active-Low Shutdown Control | Pulling low disables regulator and reduces supply current to ≤3µA; tie to IN for automatic startup. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range Support | Operates from 4V to 28V - eliminates need for intermediate buck stage in high-voltage portable systems. |
| Ultra-Low Quiescent Current | 8µA max - extends battery life in always-on backup power applications beyond 5 years with typical coin cells. |
| Pin-Selectable Output | No external resistors required - simplifies BOM and layout for dual-voltage system designs. |
| Foldback Current Limiting | 100mA typical limit with thermal foldback - safely handles short-circuit events up to 30 seconds without damage. |
| Fast Line-Transient Response | ≤50mV overshoot/undershoot during 10mA→20mA load steps - maintains stability during dynamic power mode transitions. |
Applications
| CMOS/RTC Backup Power | Microcontroller Keep-Alive |
|---|---|
Use Scenario: Maintaining real-time clock and SRAM state during main system power-off in notebooks and PDAs. IC Role / Device Role / Timing Role: Always-on linear regulator supplying clean, low-noise 3.3V or 5V to RTC and backup memory. Use Value: 8µA quiescent current enables >10-year coin-cell lifetime; ±2% accuracy preserves timekeeping integrity across temperature. | Use Scenario: Providing standby power to microcontrollers in battery-powered handheld terminals during sleep modes. IC Role / Device Role / Timing Role: Low-dropout regulator sustaining MCU core voltage during deep-sleep states with rapid wake-up capability. Use Value: 350mV dropout ensures regulation until battery reaches 3.65V (for 3.3V output), maximizing usable battery capacity. |
| Notebook Computer Auxiliary Rail | Smart-Battery Pack Monitoring |
Use Scenario: Generating auxiliary 3.3V rail for embedded controllers managing AC/battery switchover logic. IC Role / Device Role / Timing Role: High-PSRR linear regulator rejecting noise from switching adapters and battery transients. Use Value: Excellent line-transient response prevents brownouts during hot-plug events; 571mW thermal margin supports compact layout. | Use Scenario: Powering fuel-gauge ICs and protection circuitry inside lithium-ion smart-battery packs. IC Role / Device Role / Timing Role: Primary bias supply for analog front-end and SMBus interface circuits operating across wide battery voltage range. Use Value: 4V–28V input range accommodates fully charged 7S Li-ion packs (up to 29.4V); shutdown current <3µA minimizes self-discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-quiescent-current linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0533PDBVR | 3.3V fixed, 1.5µA IQ, 200mA output, SOT23-5 - higher current but lower IQ and narrower 1.4V–5.5V input range. | Not suitable for >5.5V battery inputs; lacks 28V tolerance and thermal shutdown hysteresis. | Select when input stays below 5.5V and >30mA load is required; avoid for high-voltage backup rails. |
| MCP1700T-3302E/MB | 3.3V fixed, 1.6µA IQ, 250mA output, SOT23-3 - no shutdown pin, no thermal hysteresis, smaller 2.7V–13.2V input range. | Cannot support 28V battery systems or controlled shutdown sequencing; limited thermal robustness. | Choose for cost-sensitive, low-current, low-input-voltage applications where shutdown control is unnecessary. |
Compared with TPS7A0533PDBVR and MCP1700T-3302E/MB, the MAX1615AEUK-T uniquely supports 28V input, provides pin-selectable outputs, and integrates thermal hysteresis - making it irreplaceable for high-voltage, ultra-low-power keep-alive functions in portable computing and battery management.
Availability
MAX1615AEUK-T is available at Aetrix Electronics and suitable for notebook computer auxiliary rails, smart-battery pack monitoring, and CMOS/RTC backup power requiring stable component supply across industrial temperature ranges.
Supply support for MAX1615AEUK-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 demanding industrial, computing, and battery-powered applications.
The MAX1615AEUK-T belongs to Maxim's high-voltage micropower linear regulator product line, engineered specifically for keep-alive power in systems with 4V–28V battery sources and strict quiescent current budgets.
FAQ
What is the output voltage configuration of the MAX1615AEUK-T?
The MAX1615AEUK-T provides a pin-selectable fixed output: connecting the 5/3 pin to GND sets 3.3V output, while connecting it to OUT selects 5.0V. This eliminates external feedback resistors and simplifies design. The MAX1615AEUK-T does not support adjustable output - that function is exclusive to the MAX1616 variant.
Does the MAX1615AEUK-T include thermal protection?
Yes, the MAX1615AEUK-T integrates thermal-overload protection that activates at +150°C junction temperature and includes +20°C hysteresis. When triggered, the device cycles the output on/off to prevent permanent damage during sustained overload, ensuring reliability in compact PCB layouts without forced airflow.
What is the minimum load requirement for the MAX1615AEUK-T to maintain regulation?
The MAX1615AEUK-T requires a minimum load current of 5µA to maintain output regulation across its full operating temperature range. This is satisfied by typical RTC or microcontroller standby currents, and no additional dummy load is needed in standard implementations.
Can the MAX1615AEUK-T operate from a 28V input source?
Yes, the MAX1615AEUK-T is rated for 4V to 28V input voltage and is specifically designed for high-voltage battery systems. At 28V input and 30mA load, power dissipation is 750mW - exceeding the 571mW SOT23-5 limit at +70°C ambient, so derating or thermal design is required for continuous operation at maximum ratings.
What capacitor values are recommended for the MAX1615AEUK-T?
For stable operation, the MAX1615AEUK-T requires ≥0.1µF on IN and ≥1µF on OUT; 4.7µF is recommended for full 30mA load. Ceramic capacitors with ESR <1Ω are mandatory. Larger output capacitance improves transient response but does not affect basic regulation - the MAX1615AEUK-T remains stable with these values across temperature and load.
MAX1615AEUK-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
MAX1615AEUK-T FAQ
1.How can I place an order for MAX1615AEUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1615AEUK-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 MAX1615AEUK-T reliable?
The price and inventory of MAX1615AEUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1615AEUK-T is usually 5 days.
3.What payment methods are accepted for MAX1615AEUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1615AEUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1615AEUK-T?
MAX1615AEUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1615AEUK-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 MAX1615AEUK-T?
For technical support, including MAX1615AEUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1615AEUK-T requirements.
6.How does Aetrix verify that MAX1615AEUK-T is sourced from the original manufacturer or authorized distributors?
All MAX1615AEUK-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 MAX1615AEUK-T meets industry standards.
7.What is the process for return or replacement of MAX1615AEUK-T?
All MAX1615AEUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1615AEUK-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 MAX1615AEUK-T part is unused and in its original packaging.
Return procedure for MAX1615AEUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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