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Analog Devices Inc./Maxim Integrated MAX8526EUD+
- Part No.:
- MAX8526EUD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX8526EUD+.pdf
- Description:
- IC REG LINEAR POS ADJ 2A 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,451
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Product details
Overview
MAX8526EUD+ from Maxim Integrated is a 2A, low-dropout linear regulator with 1.425V to 3.6V input range, 200mV dropout at full load, ±0.6% initial output voltage accuracy, and adjustable output from 0.5V to (VIN − 0.2V). It uses an internal p-channel MOSFET pass device, supports ceramic input/output capacitors (2.2µF/10µF), and targets high-current post-regulation in space-constrained server and optical module power rails.
For engineers reviewing the MAX8526EUD+ datasheet, MAX8526EUD+ pinout, MAX8526EUD+ application, or MAX8526EUD+ equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal and transient performance metrics, and real-world selection guidance for high-efficiency, low-headroom LDO deployment.
Technical Context
The MAX8526EUD+ implements a PMOS-based regulation architecture with a 50mΩ typical on-resistance pass transistor, enabling stable operation down to 1.425V input without base-drive current penalties. Its feedback loop references a precise 500mV FB threshold with ±4mV accuracy over temperature, supporting tight output regulation across line, load, and thermal variation.
It integrates soft-start to limit inrush current, logic-controlled shutdown with <50µA quiescent draw, and robust protection including 4A current limiting and thermal shutdown at +165°C (re-enable at +150°C). Unlike bipolar-based LDOs, its ground current remains stable-440µA typical at full load and 500µA in dropout-due to zero gate-drive requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.425V to 3.6V - enables direct regulation from single-cell Li-ion or intermediate buck outputs. |
| Max Output Current | 2A continuous - sufficient for FPGA core rails, ASIC I/O banks, or high-speed SerDes supplies. |
| Dropout Voltage | 200mV at 2A - minimizes power loss and heat generation in low-headroom applications. |
| Output Accuracy | ±0.6% initial, ±1.4% over load/line/temp (0°C to +85°C) - ensures reliable margin for 1.2V/1.8V/2.5V logic domains. |
| Ground Current | 440µA typical operating, <50µA shutdown - reduces standby power in always-on subsystems. |
| Capacitor Support | 2.2µF ceramic input, 10µF ceramic output - eliminates need for electrolytic or tantalum, improving reliability and footprint. |
| PSRR | 60dB at 1kHz (typ) - suppresses switching noise from upstream DC-DC converters. |
Pinout & Package
MAX8526EUD+ is housed in a 14-pin TSSOP package (5mm × 6.4mm, 1.1mm profile) with exposed thermal pad (EP) soldered to PCB ground for optimal thermal dissipation. Pin 1 is EN; pins 2–5 are IN; pins 10–13 are OUT; pin 8 is GND; pin 9 is FB; pins 6, 7, and 14 are test pins (T.P.). No POK or POR pins - distinguishing it from MAX8527EUD+ and MAX8528EUD+ variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Active-high logic interface; pull low for <50µA shutdown, connect to IN for always-on operation. |
| IN (Pins 2–5) | Regulator input supply | Parallel input pins reduce trace resistance and improve current handling; bypass with ≥2.2µF ceramic to GND. |
| OUT (Pins 10–13) | Regulated output | Four parallel output pins minimize IR drop and thermal stress under 2A load; bypass with ≥10µF ceramic. |
| GND (Pin 8) | Power and signal reference | Primary ground return; must be connected to EP and system ground plane for thermal and noise integrity. |
| FB (Pin 9) | Feedback node | Connects to resistor divider from OUT; 500mV reference enables precise adjustable output from 0.5V up. |
| T.P. (Pins 6, 7, 14) | Factory test points | No user connection required; left unconnected in production design. |
Key Features
| Feature | Design Value |
|---|---|
| p-Channel MOSFET Pass Device | Eliminates base-drive current, enabling stable 440µA ground current regardless of load or dropout condition. |
| Soft-Start Circuitry | Internally limits inrush current during power-up, preventing input rail sag and downstream reset glitches. |
| Thermal & Short-Circuit Protection | Shuts down at +165°C junction temp and limits output to 4A; auto-restarts at +150°C for fault-tolerant operation. |
| Ceramic Capacitor Compatibility | Stable with low-ESR ceramics only - removes electrolytic aging risk and simplifies layout in high-reliability systems. |
| Low-Noise Transient Response | 45mV max deviation for 20mA→2A load step with 10µF output cap - meets tight tolerance demands of DSP/FPGA cores. |
Applications
| Server Core Rails | Optical Module Biasing |
|---|---|
Use Scenario: Regulating 1.2V/1.8V supply for CPU/GPU memory interfaces in 1U rack servers where board space and thermal headroom are constrained. IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, low-noise power after a high-efficiency buck converter. Use Value: 200mV dropout preserves efficiency at 1.425V input; 2A capacity supports burst-mode DDR loads without voltage droop. |
Use Scenario: Providing stable bias voltage to laser diode drivers and transimpedance amplifiers in SFP+/QSFP modules operating at +85°C ambient. IC Role / Device Role / Timing Role: Low-noise, thermally robust LDO ensuring analog front-end stability under rapid temperature cycling. Use Value: ±1.4% output accuracy over 0°C to +85°C guarantees consistent optical output power; exposed pad maintains junction temp below +150°C. |
| Networking ASIC I/O Banks | Industrial ATE Power Rails |
Use Scenario: Powering multi-voltage I/O banks (1.5V, 1.8V, 2.5V) on high-port-density Ethernet switches with shared input bus. IC Role / Device Role / Timing Role: Adjustable-output LDO enabling flexible rail configuration via external resistor dividers. Use Value: 0.5V–3.4V output range covers all common I/O standards; 1.425V min input allows direct use of intermediate 1.5V/1.8V distribution rails. |
Use Scenario: Generating precision analog supply rails for automated test equipment requiring long-term calibration stability and low drift. IC Role / Device Role / Timing Role: High-accuracy, low-drift LDO serving as reference-grade power source for DACs, ADCs, and sensor excitation circuits. Use Value: ±0.6% initial accuracy and <0.15%/V line regulation minimize measurement error; ceramic capacitor compatibility avoids ESR drift over time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS75225QPWPRQ1 | 2A, 250mV dropout at 2A, 1.7V–6V input, fixed 2.5V output, automotive grade (–40°C to +125°C). | Fixed output only; no adjustability; wider input range but higher dropout. | Select when automotive qualification and fixed 2.5V output are required; not suitable for adjustable or sub-1.7V input designs. |
| LT3080IMSE#PBF | 1.1A, 330mV dropout at 1.1A, 1.2V–36V input, adjustable via single SET resistor, ±1% output accuracy. | Lower current rating, higher dropout, wider input range, different topology (current-source based). | Choose for ultra-wide input range or when single-resistor adjustment is preferred; unsuitable for 2A or <200mV dropout requirements. |
Compared with MAX8526EUD+, TPS75225QPWPRQ1 offers automotive qualification and fixed 2.5V output but lacks adjustability and has higher dropout; LT3080IMSE#PBF provides wide-input flexibility and simple SET-pin adjustment but delivers only 1.1A with reduced accuracy and higher dropout-making MAX8526EUD+ the optimal choice for high-current, low-headroom, adjustable applications in commercial temperature range.
Availability
MAX8526EUD+ is available at Aetrix Electronics and suitable for server power delivery, optical module biasing, and networking ASIC I/O banks requiring stable component supply, RoHS-compliant packaging, and guaranteed -40°C to +85°C operation.
Supply support for MAX8526EUD+ 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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, communications, and computing applications.
The MAX8526EUD+ belongs to Maxim's high-current, low-dropout LDO family designed specifically for post-regulation in space- and thermal-constrained digital systems where efficiency, accuracy, and ceramic capacitor compatibility are critical.
FAQ
What is the minimum input voltage required for MAX8526EUD+ to maintain regulation?
The MAX8526EUD+ requires a minimum input voltage of 1.425V to guarantee specified output accuracy and regulation. Below this threshold, undervoltage lockout activates at 1.35V (typ), disabling the regulator. This enables safe operation directly from single-cell Li-ion or low-voltage intermediate rails while preserving stability and transient response.
Can MAX8526EUD+ be used with tantalum or aluminum electrolytic capacitors?
No-MAX8526EUD+ is optimized exclusively for ceramic capacitors. Its control loop stability depends on the low ESR and predictable capacitance of X5R/X7R ceramics (2.2µF input, 10µF output). Tantalum or electrolytic capacitors introduce ESR variance and aging effects that can cause oscillation or degraded transient response, violating the device's specified operating conditions.
Does MAX8526EUD+ include power-good or reset functionality?
No-MAX8526EUD+ does not integrate power-good (POK) or power-on reset (POR) outputs. Those features are exclusive to the MAX8527EUD+ (POK) and MAX8528EUD+ (POR) variants. The MAX8526EUD+ is the base version with enable, feedback, and output regulation only-ideal when system-level monitoring is handled externally.
How is thermal performance managed in MAX8526EUD+?
MAX8526EUD+ uses a 14-pin TSSOP package with an exposed thermal pad (EP) that must be soldered to a PCB ground plane. Combined with GND pins 8 and the EP, this provides a low-thermal-resistance path to dissipate up to 1.7W at +70°C ambient. Proper layout-using multiple vias under the EP and a solid ground copper area-is essential to keep junction temperature below +150°C under 2A load.
What is the recommended feedback resistor configuration for a 1.5V output using MAX8526EUD+?
For a 1.5V output, use R2 = 10kΩ and R1 = 20kΩ to set VOUT = 0.5V × (1 + R1/R2) = 1.5V. R2 must be ≤5kΩ to optimize accuracy and PSRR; if using 10kΩ, ensure layout minimizes FB node leakage. Place resistors close to FB and OUT pins, and avoid routing near noisy traces to preserve regulation integrity in the MAX8526EUD+.
MAX8526EUD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- 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 @ 2A
- Current - Output:
- 2A
- Current - Quiescent (Iq):
- 440 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP-EP
MAX8526EUD+ FAQ
1.How can I place an order for MAX8526EUD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8526EUD+ 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 MAX8526EUD+ reliable?
The price and inventory of MAX8526EUD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8526EUD+ is usually 5 days.
3.What payment methods are accepted for MAX8526EUD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8526EUD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8526EUD+?
MAX8526EUD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8526EUD+ 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 MAX8526EUD+?
For technical support, including MAX8526EUD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8526EUD+ requirements.
6.How does Aetrix verify that MAX8526EUD+ is sourced from the original manufacturer or authorized distributors?
All MAX8526EUD+ 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 MAX8526EUD+ meets industry standards.
7.What is the process for return or replacement of MAX8526EUD+?
All MAX8526EUD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8526EUD+, 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 MAX8526EUD+ part is unused and in its original packaging.
Return procedure for MAX8526EUD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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