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Analog Devices Inc./Maxim Integrated MAX8518EUB
- Part No.:
- MAX8518EUB
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX8518EUB.pdf
- Description:
- IC REG LIN 1A 0.2V DROPOUT LDO
- Quantity:
- Payment:
- Shipping:
Inventory:7,575
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Product details
Overview
MAX8518EUB from Maxim Integrated is a 1A, low-dropout linear regulator with PMOS pass transistor, operating from 1.425V to 3.6V input and delivering adjustable output from 0.5V to (VIN − 0.2V); features 200mV dropout at 1A, ±1.4% output accuracy over 0°C to +85°C, and integrated 150ms power-on reset (POR) output for system sequencing in optical modules and base stations.
For engineers reviewing the MAX8518EUB datasheet, MAX8518EUB pinout, MAX8518EUB application, or MAX8518EUB equivalent, this page delivers verified technical context, real-world transient response data (45mV deviation for 20mA→1A step), ceramic capacitor compatibility (1μF IN / 4.7μF OUT), thermal shutdown behavior (+165°C trip), and POR timing accuracy (105–210ms rising delay).
Technical Context
The MAX8518EUB uses an internal p-channel MOSFET pass device with 100mΩ typical on-resistance, enabling stable regulation down to 1.425V input without base-drive current penalties. Its error amplifier includes inherent soft-start and supports external feedback via FB pin for precise output voltage setting.
It integrates a dedicated open-drain POR output that asserts high 105–210ms after VFB rises above 450mV (90% of nominal), with immediate low assertion during shutdown, short-circuit, or thermal fault. Thermal protection cycles between +165°C turn-off and +150°C recovery thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.425V to 3.6V - enables direct regulation from single Li-ion or multi-cell battery rails and low-voltage logic supplies. |
| Output Current | 1A continuous - supports high-current digital loads like FPGAs, ASICs, and SERDES transceivers without external boost. |
| Dropout Voltage | 200mV max at 1A - ensures regulation even when VIN is only 200mV above VOUT, critical for post-regulation in tight voltage-margin systems. |
| Output Accuracy | ±1.4% over load/line/temp (0°C to +85°C) - guarantees stable core voltage for processors and memory interfaces under dynamic conditions. |
| POR Delay | 105–210ms rising delay - provides deterministic system reset timing aligned with power rail stabilization, eliminating need for external RC timers. |
| Ground Current | 320μA typ at 100mA load - minimizes quiescent power loss in always-on subsystems such as management controllers and sensor hubs. |
| Shutdown Current | <25μA - enables ultra-low-power sleep modes in portable and remote equipment. |
Pinout & Package
The MAX8518EUB is housed in a 10-pin μMAX® package (3mm × 5mm) with exposed thermal pad (EP) soldered to PCB ground for optimal power dissipation (824mW at +70°C, derated 10.3mW/°C above).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | EN | Logic-enable input; pulled high to IN for operation, grounded for <25μA shutdown - supports host-controlled power sequencing. |
| 2, 3 | IN | Main input supply pin; requires ≥1μF ceramic bypass to GND - low-impedance path essential for transient stability at 1A load steps. |
| 4, 10 | N.C. | No connection; Pin 10 internally pulled down to GND with 10kΩ - must remain unconnected to avoid unintended biasing. |
| 6 | GND | Power and signal reference; dual role for electrical return and heat conduction - must be tied to large ground plane with multiple vias. |
| 7 | FB | Feedback node for adjustable output; referenced to 500mV ±1% - sets VOUT = 0.5V × (1 + R1/R2), enabling precision point-of-load regulation. |
| 8, 9 | OUT | Regulated output; requires ≥4.7μF ceramic capacitor to GND - capacitance directly determines transient overshoot (45mV typical for 20mA→1A step). |
| 5 | POR | Open-drain power-on reset output; active-low until VFB exceeds 450mV, then high after 105–210ms - drives external reset lines or microcontroller wake-up inputs. |
| EP | GND (Exposed Pad) | Thermal and electrical ground connection - mandatory soldering to PCB ground plane for thermal reliability and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS Pass Transistor | 100mΩ typical RDS(ON) eliminates base-drive current, enabling 340μA dropout supply current - reduces no-load power loss by >5× vs. PNP-based LDOs. |
| Ceramic Capacitor Compatibility | Stable with 1μF IN / 4.7μF OUT - avoids costly tantalum or electrolytic capacitors and improves reliability in high-temp or shock/vibe environments. |
| Fast Transient Response | 45mV output deviation for 20mA→1A load step - maintains voltage margin for high-speed digital ICs without requiring oversized output capacitance. |
| Integrated POR Output | 150ms typ (105–210ms range) open-drain reset - replaces discrete RC+Schmitt trigger circuits, saving board space and BOM count in compact optical modules. |
| Thermal & Short-Circuit Protection | +165°C shutdown / +150°C restart hysteresis with 2A current limit - prevents catastrophic failure during sustained overload or PCB-level shorts. |
Applications
| Optical Transceivers | Base Station RF Front-End |
|---|---|
|
Use Scenario: Powering 25G/100G SFP28 and QSFP28 laser driver ICs and TIAs where supply noise and sequencing are critical to BER performance. IC Role / Device Role / Timing Role: Post-regulator delivering clean, sequenced 1.2V/1.8V/3.3V rails with POR-aligned reset to synchronize laser enable and data path initialization. Use Value: 45mV transient deviation and 60dB PSRR at 10kHz ensure minimal jitter injection into high-speed analog front-ends. |
Use Scenario: Supplying bias voltage to GaN power amplifiers and envelope tracking modulators in 4G/5G massive MIMO active antenna units. IC Role / Device Role / Timing Role: Low-headroom LDO providing stable 5V or 8V bias under rapidly varying PA load currents, with POR ensuring safe ramp-up before RF activation. Use Value: 200mV dropout allows use of lower-input intermediate bus (e.g., 5.2V → 5.0V), improving overall system efficiency by reducing wasted headroom. |
| Network Switch ASIC Core | Industrial Edge AI Accelerator |
|
Use Scenario: Regulating core voltage (0.85V–1.1V) for multi-core switch ASICs in 10GbE/25GbE line cards with strict voltage tolerance and fast load transients. IC Role / Device Role / Timing Role: Adjustable-output LDO with FB pin enabling precise core voltage tuning; POR coordinates ASIC boot with PHY and management controller. Use Value: ±1.4% accuracy over temperature ensures ASIC remains within spec across chassis hot spots (−40°C to +85°C ambient). |
Use Scenario: Powering vision processor SoCs (e.g., NVIDIA Jetson Orin derivatives) in ruggedized edge servers deployed in factory automation or smart infrastructure. IC Role / Device Role / Timing Role: Primary 1A LDO for I/O or memory rails, with EN pin enabling firmware-controlled power gating and POR synchronizing bootloader execution. Use Value: 320μA operating current and <25μA shutdown current extend runtime in battery-backed or energy-harvested deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4700RGWR | 200mA max output, 20μVRMS noise, fixed 3.3V/5V options only - no adjustable output or POR. | Suitable for low-noise analog rails (ADC/DAC references), not high-current digital cores. | Select when ultra-low noise (<20μVRMS) is prioritized over output adjustability and reset functionality. |
| LT3045EDD#PBF | 500mA max, 0.8μVRMS noise, integrated current sense, no POR - requires external reset IC for sequencing. | Targeted at precision instrumentation and medical sensors requiring sub-1μV noise. | Select when nanovolt-level noise rejection and current monitoring outweigh 1A capability and built-in POR. |
Compared with TPS7A4700RGWR and LT3045EDD#PBF, the MAX8518EUB uniquely combines 1A output, adjustable voltage, and integrated POR in a 10-pin μMAX package - making it the only option among the three suitable for space-constrained, high-current, sequenced digital power delivery.
Availability
MAX8518EUB is available at Aetrix Electronics and suitable for optical modules, base stations, network switches, and industrial edge AI accelerators requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8518EUB 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 high-performance analog and mixed-signal ICs for power, interface, sensing, and timing applications across industrial, communications, and computing markets.
The MAX8516/MAX8517/MAX8518 family was engineered specifically for low-input-voltage, high-current post-regulation in space-constrained telecom and datacom systems - emphasizing ceramic capacitor compatibility, fast transient response, and integrated power-good/reset signaling.
FAQ
What is the guaranteed dropout voltage of the MAX8518EUB at full 1A load?
The MAX8518EUB guarantees a maximum dropout voltage of 200mV at 1A output current, measured with VIN = 1.425V, VFB = 480mV, and TA = −40°C to +85°C. This specification ensures reliable regulation even when input voltage is only 200mV above the desired output, critical for battery-powered and low-voltage intermediate bus applications. The MAX8518EUB achieves this using an internal p-channel MOSFET with 100mΩ typical RDS(ON).
Does the MAX8518EUB require external components for basic operation?
Yes - the MAX8518EUB requires a minimum 1μF ceramic capacitor between IN and GND, and a 4.7μF ceramic capacitor between OUT and GND for stable 1A operation. An external resistor divider from OUT to FB sets the output voltage (VOUT = 0.5V × (1 + R1/R2)), and a pullup resistor on POR is needed for open-drain reset signaling. No compensation network is required due to internal stability optimization.
How does the POR function behave during thermal fault or short-circuit events?
During thermal overload or output short-circuit, the MAX8518EUB's POR output immediately transitions low - independent of the 105–210ms timing window - to signal loss of valid regulation. This behavior is documented in the Functional Diagram and Detailed Description sections of the datasheet. POR remains low until both normal regulation is restored *and* the 150ms POR timer completes its rising-edge delay, ensuring robust system-level fault detection.
Can the MAX8518EUB be used with input voltages below 1.425V?
No - the absolute minimum input voltage for the MAX8518EUB is 1.425V, as specified in Absolute Maximum Ratings and Electrical Characteristics. Operation below this threshold risks undervoltage lockout activation (trip point 1.32–1.38V with 70mV hysteresis) and undefined regulation behavior. The device is not characterized or guaranteed for operation at 1.2V or other sub-threshold values.
What is the thermal resistance benefit of the exposed pad on the MAX8518EUB package?
The exposed thermal pad (EP) on the MAX8518EUB's μMAX package lowers junction-to-board thermal resistance, enabling 824mW continuous power dissipation at +70°C ambient (derated 10.3mW/°C above). When soldered to a 4-layer PCB with ≥4 thermal vias to an internal ground plane, EP reduces θJA by ~30°C/W versus non-exposed alternatives - directly extending safe operating time under 1A load at elevated ambient temperatures.
MAX8518EUB 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:
- Bulk
- 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 FAQ
1.How can I place an order for MAX8518EUB through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8518EUB 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 reliable?
The price and inventory of MAX8518EUB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8518EUB is usually 5 days.
3.What payment methods are accepted for MAX8518EUB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8518EUB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8518EUB?
MAX8518EUB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8518EUB 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?
For technical support, including MAX8518EUB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8518EUB requirements.
6.How does Aetrix verify that MAX8518EUB is sourced from the original manufacturer or authorized distributors?
All MAX8518EUB 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 meets industry standards.
7.What is the process for return or replacement of MAX8518EUB?
All MAX8518EUB units undergo pre-shipment inspection (PSI). If there is an issue with MAX8518EUB, 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 part is unused and in its original packaging.
Return procedure for MAX8518EUB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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