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Analog Devices Inc./Maxim Integrated MAX8518EUB+T
- Part No.:
- MAX8518EUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX8518EUB+T.pdf
- Description:
- IC REG LINEAR POS ADJ 1A 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,643
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Product details
Overview
MAX8518EUB+T from Maxim Integrated is a 1A, low-dropout linear regulator with PMOS pass transistor, 150ms power-on reset (POR) output, and 200mV dropout at full load. It operates from 1.425V to 3.6V input, delivers adjustable output from 0.5V to (VIN − 0.2V), and maintains ±1.4% accuracy over 0°C to +85°C - used in optical modules, base stations, and post-regulation for FPGAs and ASICs.
For engineers reviewing the MAX8518EUB+T datasheet, MAX8518EUB+T pinout, MAX8518EUB+T application, or MAX8518EUB+T equivalent, this page provides verified pin functions, POR timing behavior, ceramic capacitor compatibility, thermal shutdown thresholds, and validated alternative LDOs for high-reliability embedded power systems.
Technical Context
The MAX8518EUB+T integrates an internal p-channel MOSFET pass device with 100mΩ typical on-resistance, enabling stable regulation down to 1.425V input without external biasing. Its feedback loop uses a precision 500mV reference with ±7mV tolerance over temperature, supporting accurate adjustable outputs via external resistor dividers.
It features dedicated open-drain POR output with 105–210ms rising delay, 10mV hysteresis, and immediate low assertion during shutdown, short-circuit, or thermal fault. Soft-start limits inrush current, while 340μA typical ground current in dropout ensures efficiency under heavy load and low VIN conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.425V to 3.6V - supports single-cell Li-ion, low-voltage logic rails, and intermediate bus architectures. |
| Output Current | 1A continuous - sufficient for powering core logic, DDR memory termination, or FPGA I/O banks. |
| Dropout Voltage | 200mV max at 1A - enables high-efficiency operation with minimal headroom, critical for battery-powered systems. |
| Output Accuracy | ±1.4% over load/line/temp (0°C to +85°C) - ensures stable voltage for sensitive analog and digital circuits. |
| POR Delay Time | 105–210ms after VOUT reaches 90% - provides reliable system-level reset timing for microcontrollers and DSPs. |
| Ground Current | 320μA typ at 100mA load; 340μA typ in dropout - minimizes quiescent power loss in always-on subsystems. |
| Shutdown Current | <25μA - enables ultra-low-power sleep modes in portable and IoT edge devices. |
Pinout & Package
MAX8518EUB+T is housed in a 10-pin μMAX® package (3mm × 5mm) with exposed pad (EP) soldered to PCB ground for optimal thermal dissipation (θJA = 122°C/W, derated above +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | EN | Logic-controlled enable input - pull low for <25μA shutdown; connect to IN for always-on operation. |
| 2, 3 | IN | Main input supply - accepts 1.425V–3.6V; requires ≥1μF ceramic bypass to GND near pin. |
| 4, 10 | N.C. | No connection - Pin 10 internally pulled down to GND with 10kΩ; leave floating. |
| 6 | GND | Power and signal ground - must be connected to PCB ground plane and EP for thermal management. |
| 7 | FB | Feedback input - senses output via resistor divider; 500mV nominal threshold with ±7mV tolerance. |
| 8, 9 | OUT | Regulated output - delivers up to 1A; requires ≥4.7μF ceramic capacitor to GND for stability. |
| 5 | POR | Open-drain power-on reset - asserts low until VOUT stabilizes, then goes high after 105–210ms delay. |
| EP | GND (thermal) | Exposed pad - must be soldered to large ground plane or multiple vias for thermal conduction and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS Pass Transistor | 100mΩ typical RDS(ON) - eliminates base-drive current, reducing quiescent consumption vs. PNP-based LDOs. |
| Ceramic Capacitor Compatibility | Stable with 1μF input / 4.7μF output - avoids costly tantalum or electrolytic capacitors and improves reliability. |
| Fast Load Transient Response | 45mV deviation for 20mA→1A step - maintains voltage integrity during CPU/FPGA burst loads without external compensation. |
| Thermal Shutdown Protection | +165°C trip / +150°C recovery - prevents permanent damage during sustained overload or poor heatsinking. |
| Soft-Start Circuitry | Inherent ramp-up - limits inrush current to prevent input rail sag and avoid false POR triggering. |
Applications
| Optical Transceivers | Base Station RF Front-End |
|---|---|
Use Scenario: Powering 25G/100G SFP28 and QSFP28 transceiver laser drivers and TIAs where tight voltage tolerance and low noise are mandatory. IC Role / Device Role / Timing Role: Post-regulator delivering precise 1.2V or 1.8V to analog front-end circuitry with POR-synchronized initialization. Use Value: 150ms POR ensures clean startup before data transmission begins; ±1.4% output accuracy maintains laser bias stability across temperature. |
Use Scenario: Supplying bias voltage to GaN power amplifiers and low-noise amplifiers in 4G/5G macrocell and small-cell radios. IC Role / Device Role / Timing Role: Local LDO providing clean, low-ripple 3.3V supply with thermal protection during high-PAPR signal bursts. Use Value: 200mV dropout enables efficient use of intermediate 3.6V bus; 340μA dropout current minimizes standby power in idle channels. |
| FPGA Core Voltage Regulation | Industrial Edge AI Accelerators |
Use Scenario: Regulating core voltage (e.g., 0.85V) for Xilinx Zynq or Intel Agilex FPGAs in reconfigurable computing platforms. IC Role / Device Role / Timing Role: Adjustable LDO with FB pin enabling dynamic voltage scaling; POR output resets configuration logic before bitstream loading. Use Value: 0.5V–3.4V output range supports modern low-VDD cores; soft-start prevents configuration errors during power-up. |
Use Scenario: Powering vision processors (e.g., NVIDIA Jetson Orin SoM) in factory automation cameras requiring robust reset sequencing. IC Role / Device Role / Timing Role: Primary 1.2V/1.8V supply with POR synchronized to processor boot ROM execution. Use Value: 105–210ms POR delay matches typical ARM Cortex-A bootloader timeout windows; RoHS-compliant +T suffix meets industrial compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4700RGWR | 20V input, 1A, 325μV RMS noise, no POR - higher PSRR but lacks integrated reset function. | Suitable for ultra-low-noise analog supplies (e.g., ADC references), not system-reset-critical digital rails. | Select when noise performance outweighs POR requirement; requires external reset IC for sequencing. |
| MCP1826T-3302E/DB | 3.3V fixed output, 1A, 350mV dropout, no POR - lower cost but non-adjustable and no reset output. | Better for cost-sensitive, fixed-voltage applications like USB peripherals or sensor nodes without complex boot sequencing. | Choose only if output voltage is fixed at 3.3V and POR is handled elsewhere in the BOM. |
Compared with TPS7A4700RGWR and MCP1826T-3302E/DB, the MAX8518EUB+T uniquely combines 1A adjustable output, 200mV dropout, and integrated 150ms POR in a compact μMAX package - eliminating need for discrete reset ICs and simplifying power-tree design for space-constrained telecom and embedded systems.
Availability
MAX8518EUB+T is available at Aetrix Electronics and suitable for optical modules, base stations, and FPGA power management requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8518EUB+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, communications, and computing applications.
The MAX8516/MAX8517/MAX8518 family was engineered specifically for high-current, low-input-voltage LDO applications in space-constrained infrastructure equipment - emphasizing ceramic capacitor compatibility, thermal resilience, and integrated power-good/reset signaling.
FAQ
What is the exact POR delay specification for MAX8518EUB+T?
The MAX8518EUB+T POR output transitions high 105ms to 210ms after the regulated output rises above 90% of its nominal value. This delay is guaranteed across -40°C to +85°C and is implemented with internal hysteresis to prevent chatter during marginal startup conditions. The MAX8518EUB+T POR function is fully integrated and requires only an external pullup resistor to IN.
Can MAX8518EUB+T operate with input voltage below 1.425V?
No - the MAX8518EUB+T has a hard input undervoltage lockout (UVLO) threshold of 1.32V to 1.38V (with 70mV hysteresis). Operation below 1.425V is outside specification and may result in unregulated output, excessive dropout, or failure to assert POR. The MAX8518EUB+T is designed for stable regulation only within its rated 1.425V–3.6V input range.
Does MAX8518EUB+T require external components for stability?
Yes - the MAX8518EUB+T requires a minimum 1μF ceramic capacitor between IN and GND, and a minimum 4.7μF ceramic capacitor between OUT and GND for stable 1A operation. Smaller output capacitance may be used for reduced load currents (e.g., COUT = IOUT(MAX) × 1μF/200mA), but 4.7μF is mandatory for full 1A transient performance per the MAX8518EUB+T datasheet.
How does the MAX8518EUB+T handle thermal overload?
The MAX8518EUB+T activates thermal shutdown at +165°C junction temperature and recovers at +150°C. During fault, it cycles ON/OFF to limit average power dissipation. This behavior is confirmed in the MAX8518EUB+T functional diagram and absolute maximum ratings table, and applies regardless of EN or POR state - ensuring protection even during system reset sequences.
Is MAX8518EUB+T pin-compatible with MAX8517EUB+T?
No - although both share the same 10-pin μMAX package and pin 1–9 assignments, MAX8517EUB+T uses Pin 4 for POK (power-ok), whereas MAX8518EUB+T uses Pin 5 for POR (power-on reset). Pin 4 on MAX8518EUB+T is N.C., and Pin 5 on MAX8517EUB+T is N.C. Swapping them without board revision will disable the respective reset function and may cause incorrect system boot behavior.
MAX8518EUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 3.6V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 3.4V
- Voltage Dropout (Max):
- 0.2V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 320 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Temperature, Short Circuit, Soft Start, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX-EP
MAX8518EUB+T FAQ
1.How can I place an order for MAX8518EUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8518EUB+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 MAX8518EUB+T reliable?
The price and inventory of MAX8518EUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8518EUB+T is usually 5 days.
3.What payment methods are accepted for MAX8518EUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8518EUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8518EUB+T?
MAX8518EUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8518EUB+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 MAX8518EUB+T?
For technical support, including MAX8518EUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8518EUB+T requirements.
6.How does Aetrix verify that MAX8518EUB+T is sourced from the original manufacturer or authorized distributors?
All MAX8518EUB+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 MAX8518EUB+T meets industry standards.
7.What is the process for return or replacement of MAX8518EUB+T?
All MAX8518EUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8518EUB+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 MAX8518EUB+T part is unused and in its original packaging.
Return procedure for MAX8518EUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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