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Analog Devices Inc./Maxim Integrated MAX1616EUK+T
- Part No.:
- MAX1616EUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX1616EUK+T.pdf
- Description:
- IC REG LIN POS ADJ 30MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,318
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Product details
Overview
MAX1616EUK+T from Maxim Integrated is a micropower adjustable-output linear regulator in SOT23-5 package, designed for high-voltage battery backup systems. It delivers 1.24V to 28V output at up to 30mA, with 4V–28V input range, 350mV dropout at 30mA, ±2% initial output accuracy, and 8µA max quiescent current-enabling always-on power for microcontroller RTC and CMOS RAM in notebook computers and smart-battery packs.
For engineers reviewing the MAX1616EUK+T datasheet, MAX1616EUK+T pinout, MAX1616EUK+T application, or MAX1616EUK+T equivalent, key selection criteria include its adjustable feedback architecture (FB pin), thermal shutdown at +150°C, <1µA shutdown current, SOT23-5 thermal performance (571mW @ +70°C), and compatibility with low-ESR ceramic output capacitors down to 1µF.
Technical Context
The MAX1616EUK+T implements an NPN-based linear regulation architecture with external resistor feedback via the FB pin, referenced to a precision 1.24V internal bandgap. Its control loop maintains regulation across wide input (4V–28V) and load (5µA–30mA) ranges while sustaining sub-8µA quiescent supply current in active mode.
Shutdown is activated by pulling SHDN low, disabling the pass transistor and reducing supply current to <1µA. Thermal protection engages at +150°C junction temperature with +20°C hysteresis, enabling self-recovery under sustained overload without latch-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 28V - supports direct connection to Li-ion stacks, 12V/24V industrial rails, and AC adapter switchover without external pre-regulation. |
| Output Voltage Range | 1.24V to 28V - set externally via two-resistor divider; enables flexible biasing of analog sensors, ADC references, or low-voltage logic rails. |
| Max Output Current | 30mA continuous - sufficient for RTC, SRAM, and ultra-low-power µC keep-alive circuits; limited to prevent exceeding 571mW package dissipation. |
| Dropout Voltage | 350mV at 30mA - ensures stable 3.3V output even when input drops to 3.65V, critical during battery discharge transitions. |
| Quiescent Current | 8µA max - preserves battery life over years in backup applications; <1µA in shutdown extends shelf life in storage. |
| FB Threshold Voltage | 1.24V ±2.5% - defines output setpoint accuracy; allows ±2% output tolerance with standard 1% resistors. |
| Thermal Shutdown | +150°C with +20°C hysteresis - prevents permanent damage during sustained overload; enables pulsed operation rather than hard latch-off. |
Pinout & Package
SOT23-5 package with exposed pad thermal path; 571mW power dissipation capability at +70°C ambient; footprint compatible with JEDEC MO-178AA standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Positive Input Supply | Accepts 4V–28V unregulated input; requires ≥0.1µF ceramic bypass capacitor close to pin. |
| 2 GND | Ground Reference & Thermal Path | Primary return path and primary heat conduction route; must connect to large copper area or ground plane. |
| 3 FB | Feedback Input | High-impedance (≤30nA) node referenced to 1.24V; sets output via external R1/R2 divider per VOUT = 1.24 × (1 + R1/R2). |
| 4 SHDN | Active-Low Shutdown Control | Pulled low to disable regulator; draws ≤1µA in shutdown; tie to IN for automatic startup on power application. |
| 5 OUT | Regulated Output | Delivers adjustable voltage; requires ≥1µF ceramic output capacitor (4.7µF recommended for full 30mA load). |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Architecture | Enables precise voltage setting from 1.24V to 28V using only two external resistors-no trimming or factory programming required. |
| Ultra-Low Quiescent Current | 8µA max active current ensures multi-year battery life in backup applications where load current is typically <100µA. |
| Fast Line-Transient Response | Maintains <50mV output deviation during 10mA→20mA load steps, critical for stable µC operation during wake-up events. |
| Integrated Thermal Protection | Self-resetting +150°C shutdown with +20°C hysteresis avoids system lockup and enables graceful degradation under overload. |
| Lead-Free SOT23-5 Package | RoHS-compliant ABZE top mark; meets IPC/JEDEC J-STD-020 reflow profiles; thermal resistance θJA = 220°C/W typical. |
Applications
| CMOS/RTC Backup Power | Microcontroller Keep-Alive Supply |
|---|---|
Use Scenario: Maintaining timekeeping and volatile memory state in notebooks and PDAs during main power loss or battery swap. IC Role / Device Role / Timing Role: Always-on linear regulator supplying clean, low-noise 3.3V or adjustable voltage to RTC and SRAM banks. Use Value: 8µA quiescent current extends coin-cell or primary battery life beyond 5 years; 350mV dropout sustains regulation until battery reaches 3.65V. | Use Scenario: Providing standby bias to microcontrollers in smart-battery packs and handheld terminals during deep-sleep modes. IC Role / Device Role / Timing Role: Low-power voltage source enabling µC wake-from-sleep functionality without external enable sequencing. Use Value: <1µA shutdown current eliminates parasitic drain; FB pin allows matching µC core voltage (e.g., 1.8V) precisely without custom parts. |
| Notebook Computer Auxiliary Rail | Battery-Powered Industrial Sensor Node |
Use Scenario: Generating isolated auxiliary voltage for keyboard controllers, lid-open detection, or embedded security ICs during AC/battery switchover. IC Role / Device Role / Timing Role: High-input-voltage LDO decoupling fast transients from main DC-DC converter during adapter plug/unplug events. Use Value: Excellent line-transient response (<50mV overshoot) and 60dB ripple rejection at 1kHz ensure stable logic supply despite 20V input jumps. | Use Scenario: Powering analog front-end circuitry (e.g., precision op-amps, ADCs) in remote environmental monitors powered by Li-SOCl₂ cells. IC Role / Device Role / Timing Role: Low-noise, adjustable regulator delivering stable reference voltage independent of battery aging or temperature drift. Use Value: ±2% output accuracy and 1.24V FB threshold enable <0.5% total system voltage error with 1% resistors; 5mVp-p noise avoids ADC quantization errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable-output linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1761ES5-3.3#TRMPBF | Fixed 3.3V output; 20µA quiescent current; 300mV dropout at 100mA; no FB pin. | Limited to fixed-voltage use cases; unsuitable for adjustable or >3.3V outputs. | Select only if 3.3V is sufficient and higher quiescent current is acceptable. |
| TSP50232DRVT | Adjustable 1.2V–15V output; 25µA quiescent current; 400mV dropout at 50mA; integrated soft-start. | Higher IQ reduces battery life; wider dropout limits low-VIN headroom vs. MAX1616EUK+T. | Prefer when soft-start is mandatory and 25µA IQ is tolerable in the system. |
Compared with LT1761ES5-3.3#TRMPBF and TSP50232DRVT, the MAX1616EUK+T offers the lowest quiescent current (8µA), widest input range (4V–28V), and tightest FB threshold tolerance (±2.5%), making it uniquely suited for long-life, high-voltage backup and adjustable bias applications where efficiency and flexibility are critical.
Availability
MAX1616EUK+T is available at Aetrix Electronics and suitable for notebook computer auxiliary rails, smart-battery pack keep-alive circuits, and industrial sensor node bias supplies requiring stable component supply across extended product lifecycles.
Supply support for MAX1616EUK+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 communications applications.
The MAX1615/MAX1616 product line targets high-input-voltage, ultra-low-power linear regulation-specifically engineered for battery-backed systems where decades-long backup runtime and seamless AC/battery switchover are essential.
FAQ
What is the minimum load requirement for stable regulation of the MAX1616EUK+T?
The MAX1616EUK+T requires a minimum load current of 5µA to maintain output regulation across temperature and input voltage. This is enforced by the internal bandgap reference and error amplifier design. Operating below 5µA may cause output voltage drift or instability, especially near temperature extremes. For zero-load applications, consider adding a bleeder resistor or selecting a regulator with true zero-load capability.
Can the MAX1616EUK+T be used with ceramic output capacitors, and what ESR limit applies?
Yes, the MAX1616EUK+T is fully compatible with ceramic output capacitors. The datasheet specifies that the effective series resistance (ESR) must be less than 1Ω for stable operation. Standard X7R or X5R ceramics meeting this ESR spec-such as 4.7µF/16V X7R in 0805 package-are recommended for full 30mA loads. Avoid high-ESR tantalum or aluminum electrolytics unless explicitly compensated.
How does the FB pin of the MAX1616EUK+T function, and what is its input bias current?
The FB pin of the MAX1616EUK+T is the high-impedance input of the internal error amplifier, referenced to a precise 1.24V bandgap. It regulates the output so that the voltage at FB equals 1.24V. Its input bias current is specified as -10nA to +30nA (typical ±12nA), enabling use of high-value feedback resistors (e.g., R2 = 250kΩ) without significant setpoint error.
What thermal derating applies to the MAX1616EUK+T in SOT23-5 package?
The MAX1616EUK+T in SOT23-5 has a continuous power dissipation limit of 571mW at +70°C ambient. Above +70°C, it must be derated at 7.1mW/°C. At +85°C ambient, maximum allowable dissipation drops to 465mW. This assumes standard PCB layout with GND-connected thermal pad; inadequate copper area reduces actual thermal performance significantly.
Is the MAX1616EUK+T RoHS-compliant and lead-free?
Yes, the MAX1616EUK+T is RoHS-compliant and supplied in a lead-free package, indicated by the "+" suffix in the part number and ABZE top mark. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for standard reflow soldering profiles without special handling requirements.
MAX1616EUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 1.24V
- Voltage - Output (Max):
- 28V
- Voltage Dropout (Max):
- 0.35V @ 30mA
- Current - Output:
- 30mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX1616EUK+T FAQ
1.How can I place an order for MAX1616EUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1616EUK+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 MAX1616EUK+T reliable?
The price and inventory of MAX1616EUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1616EUK+T is usually 5 days.
3.What payment methods are accepted for MAX1616EUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1616EUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1616EUK+T?
MAX1616EUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1616EUK+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 MAX1616EUK+T?
For technical support, including MAX1616EUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1616EUK+T requirements.
6.How does Aetrix verify that MAX1616EUK+T is sourced from the original manufacturer or authorized distributors?
All MAX1616EUK+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 MAX1616EUK+T meets industry standards.
7.What is the process for return or replacement of MAX1616EUK+T?
All MAX1616EUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1616EUK+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 MAX1616EUK+T part is unused and in its original packaging.
Return procedure for MAX1616EUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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