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Analog Devices Inc./Maxim Integrated MAX8528EUD+T
- Part No.:
- MAX8528EUD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX8528EUD+T.pdf
- Description:
- IC REG LINEAR POS ADJ 2A 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,652
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Product details
Overview
MAX8528EUD+T from Maxim Integrated is a 2A, low-dropout linear regulator with internal p-channel MOSFET pass device, 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 across line, load, and temperature. It serves as a post-regulator in high-density server and optical module power rails.
For engineers reviewing the MAX8528EUD+T datasheet, MAX8528EUD+T pinout, MAX8528EUD+T application, or MAX8528EUD+T equivalent, this page provides verified functional identity, confirmed 14-pin TSSOP package mapping, validated POR timing and dropout behavior, ceramic-capacitor compatibility, thermal protection thresholds, and real-world transient response data under 2A load steps.
Technical Context
The MAX8528EUD+T uses an internal p-channel MOSFET pass transistor with 50mΩ typical on-resistance, enabling stable regulation down to 1.425V input without base-drive current penalties. Its feedback loop references a precision 500mV FB threshold with ±1.4% total error over temperature and load.
It integrates a dedicated open-drain POR output that asserts high 150ms (typ) after VOUT rises above 90% of nominal, with immediate deassertion during shutdown, short-circuit, or thermal fault. The device features soft-start, <50µA shutdown current, and thermal shutdown at +165°C (rising) / +150°C (falling).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2A continuous - supports high-current core logic or FPGA I/O rails without external boost stages. |
| Dropout Voltage | 200mV max at 2A - enables efficient operation with minimal headroom, e.g., 1.5V output from 1.7V input. |
| Input Voltage Range | 1.425V to 3.6V - compatible with single-cell Li-ion, intermediate bus rails, and low-voltage ASIC supplies. |
| Output Accuracy | ±1.4% over 0°C to +85°C, line/load - ensures reliable voltage margining for DDR3/DDR4 memory and ARM Cortex-A cores. |
| POR Delay | 150ms typical rising delay - meets JEDEC JESD78B reset timing requirements for microprocessors and FPGAs. |
| Ground Current | 440µA typical operating, <50µA shutdown - minimizes standby power in always-on subsystems. |
| Thermal Shutdown | +165°C trip, +150°C recovery - provides safe-cycle protection during sustained overload or poor PCB heatsinking. |
Pinout & Package
MAX8528EUD+T is housed in a 14-pin TSSOP package (5mm × 6.4mm footprint, 1.1mm profile) with exposed thermal pad (EP) soldered to PCB ground for optimal power dissipation. Pin 1 is EN; pins 2–5 are IN; pins 6, 14 are T.P.; pin 7 is POR; pin 8 is GND; pin 9 is FB; pins 10–13 are OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Logic-high (>1.2V) enables regulation; logic-low (<0.4V) places device in <50µA shutdown mode with internal 10kΩ output pull-down. |
| IN (Pins 2–5) | Input power supply connection | Parallel input pins reduce trace resistance and inductance; requires ≥2.2µF ceramic bypass to GND for stability at 2A. |
| POR (Pin 7) | Open-drain power-on reset output | Asserts high 150ms after VOUT reaches 90% of target; deasserts immediately on fault-requires external pull-up to IN. |
| GND (Pin 8) | Power and signal reference | Shared electrical and thermal path; must be connected to large ground plane along with EP for thermal management. |
| FB (Pin 9) | Feedback reference node | Senses 500mV ±1.4%; sets output via resistor divider (VOUT = 0.5V × (1 + R1/R2)); R2 < 5kΩ recommended for accuracy. |
| OUT (Pins 10–13) | Regulated output terminals | Parallel output pins lower effective ESR and inductance; require ≥10µF ceramic capacitor for 2A operation. |
| EP (Exposed Pad) | Thermal and electrical ground | Must be soldered to PCB ground plane using multiple vias-primary heat conduction path; not electrically isolated. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS Pass Transistor | 50mΩ typical on-resistance eliminates base-drive current loss-maintains 440µA quiescent current even at 2A load and in dropout. |
| Ceramic Capacitor Compatibility | Stable with ≥2.2µF input and ≥10µF output ceramic caps-enables compact, low-ESR designs without tantalum or electrolytic components. |
| Fast Load Transient Response | 45mV deviation for 20mA → 2A step with only 10µF output cap-reduces need for oversized bulk capacitance in space-constrained modules. |
| Integrated POR Function | Dedicated 150ms reset timer referenced to actual output voltage-not dependent on external RC networks or supply monitoring ICs. |
| Robust Fault Protection | Current limit (4A typ), thermal shutdown (+165°C), and automatic recovery cycle prevent latch-up and enable self-healing under overload. |
Applications
| Optical Transceiver Modules | Server Core Voltage Rails |
|---|---|
|
Use Scenario: Powering 10G/25G SFP28 and QSFP28 transceiver laser drivers and TIAs where tight voltage tolerance and fast transient response are critical. IC Role / Device Role / Timing Role: Post-regulator delivering precise 1.2V or 1.8V from intermediate 3.3V or 2.5V bus; POR synchronizes laser bias enable with stable VCC. Use Value: 200mV dropout allows higher efficiency than competing LDOs at low VIN, while 45mV transient deviation prevents bit-error-rate degradation during burst-mode signaling. |
Use Scenario: Providing clean, sequenced power to multi-core CPUs or AI accelerators in 1U rack servers with constrained airflow and thermal budgets. IC Role / Device Role / Timing Role: Secondary regulator for I/O or cache voltage domains; POR ensures deterministic boot sequencing before PCIe or memory controller initialization. Use Value: Exposed pad + parallel IN/OUT pins enable 2A delivery within 1.1mm height limit; ±1.4% accuracy avoids derating required by looser-tolerance alternatives. |
| Base Station RF Front-End | Industrial Embedded Controllers |
|
Use Scenario: Supplying bias voltage to GaN power amplifiers and analog front-end ICs in 4G/5G macro base stations operating in extended temperature environments. IC Role / Device Role / Timing Role: Low-noise local regulator for sensitive RF sections; thermal shutdown + recovery cycle sustains operation during ambient temperature spikes. Use Value: PSRR >50dB at 10kHz and 440µA quiescent current minimize noise coupling into RF signal paths while maintaining low standby power. |
Use Scenario: Powering ARM-based PLC controllers and HMI displays deployed in factory automation cabinets with wide ambient temperature swings. IC Role / Device Role / Timing Role: Main system regulator for 3.3V or adjustable logic rails; POR replaces discrete RC reset circuits, improving long-term reliability. Use Value: -40°C to +85°C guaranteed operation with no derating, combined with ceramic capacitor compatibility, eliminates field failures from capacitor aging or cold-start issues. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A8300RGRT | Lower quiescent current (2.5µA), but 3A rated; requires minimum 22µF output cap; no integrated POR. | Lacks built-in reset function-requires external supervisor IC for boot sequencing. | Choose when ultra-low IQ dominates over POR integration and board space is available for larger output capacitance. |
| NCP1117ST50T3G | Fixed 5.0V output only; 1A rated; 1.2V dropout at 1A; no POR, no thermal cycling recovery. | Not suitable for adjustable or sub-5V rails; lacks fault-handling intelligence for unattended systems. | Consider only for cost-sensitive, fixed-voltage, low-current legacy designs where POR and thermal resilience are unnecessary. |
Compared with TPS7A8300RGRT and NCP1117ST50T3G, the MAX8528EUD+T uniquely combines 2A capability, adjustable output, integrated 150ms POR, and thermal fault recovery in a 14-pin TSSOP-making it optimal for space-constrained, thermally demanding, and boot-critical embedded power applications.
Availability
MAX8528EUD+T is available at Aetrix Electronics and suitable for server power distribution, optical module regulation, and industrial embedded controller designs requiring stable component supply, RoHS-compliant packaging, and guaranteed -40°C to +85°C operation.
Supply support for MAX8528EUD+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) 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 MAX8526/MAX8527/MAX8528 family was designed specifically for high-current, low-headroom post-regulation in dense, thermally constrained systems such as optical modules, base stations, and enterprise servers-emphasizing ceramic capacitor compatibility, fast transient response, and integrated system-level functions like POR.
FAQ
What is the exact power-on reset (POR) timing behavior of the MAX8528EUD+T?
The MAX8528EUD+T asserts its open-drain POR output high 150ms (typical) after the regulated output voltage rises above 90% of its nominal value. This delay is internally generated and independent of external components. If the output subsequently falls below 90%, or if the device enters shutdown or experiences thermal/short-circuit fault, POR immediately transitions low. The MAX8528EUD+T POR is not adjustable and requires an external pull-up resistor to IN.
Does the MAX8528EUD+T support ceramic output capacitors, and what is the minimum value for 2A operation?
Yes, the MAX8528EUD+T is fully stable with ceramic output capacitors. For full 2A continuous output current, a minimum of 10µF ceramic capacitor with low ESR is required between OUT and GND. Smaller values may be used for reduced load currents: COUT = IOUT(max) × (1µF / 200mA). The MAX8528EUD+T does not require series resistance or special ESR ranges, unlike older LDO architectures.
What is the thermal shutdown behavior of the MAX8528EUD+T, and does it auto-recover?
The MAX8528EUD+T features thermal shutdown that trips at +165°C (rising junction temperature) and resets at +150°C (falling). When tripped, the output is disabled and the device cools passively. Upon cooling to +150°C, regulation automatically resumes-no external reset or power cycle is needed. This hysteresis prevents oscillation and enables self-healing during temporary overload conditions, a key reliability feature of the MAX8528EUD+T.
Can the MAX8528EUD+T be used with input voltages below 1.425V?
No. The MAX8528EUD+T has a specified minimum input voltage of 1.425V, enforced by internal undervoltage lockout (UVLO) with 70mV hysteresis. Below this threshold, the device remains disabled regardless of EN state. Attempting operation below 1.425V risks failure to regulate, increased dropout, or undefined POR behavior. The MAX8528EUD+T is not rated or characterized for sub-1.425V operation.
How is the output voltage set on the MAX8528EUD+T, and what is the FB reference voltage?
The MAX8528EUD+T uses an external resistor divider from OUT to FB to GND to set the output voltage. The feedback pin (FB) has a precise 500mV reference voltage (±1.4% over temperature and load), so VOUT = 0.5V × (1 + R1/R2). To optimize accuracy and quiescent current, R2 should be less than 5kΩ. The MAX8528EUD+T does not support fixed-output variants-the FB pin is mandatory for all configurations.
MAX8528EUD+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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 @ 2A
- Current - Output:
- 2A
- Current - Quiescent (Iq):
- 440 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Power On Reset
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP-EP
MAX8528EUD+T FAQ
1.How can I place an order for MAX8528EUD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8528EUD+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 MAX8528EUD+T reliable?
The price and inventory of MAX8528EUD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8528EUD+T is usually 5 days.
3.What payment methods are accepted for MAX8528EUD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8528EUD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8528EUD+T?
MAX8528EUD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8528EUD+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 MAX8528EUD+T?
For technical support, including MAX8528EUD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8528EUD+T requirements.
6.How does Aetrix verify that MAX8528EUD+T is sourced from the original manufacturer or authorized distributors?
All MAX8528EUD+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 MAX8528EUD+T meets industry standards.
7.What is the process for return or replacement of MAX8528EUD+T?
All MAX8528EUD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8528EUD+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 MAX8528EUD+T part is unused and in its original packaging.
Return procedure for MAX8528EUD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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