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Analog Devices Inc./Maxim Integrated MAX8528EUD+
- Part No.:
- MAX8528EUD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX8528EUD+.pdf
- Description:
- IC REG LINEAR POS ADJ 2A 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:840
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Product details
Overview
MAX8528EUD+ from Maxim Integrated is a 2A, low-dropout linear regulator with 150ms power-on reset (POR) output, designed for post-regulation in high-current digital systems. It operates from 1.425V to 3.6V input, delivers adjustable output from 0.5V to (VIN − 0.2V), achieves ±1.4% accuracy over 0°C to +85°C, and maintains only 200mV dropout at full 2A load - enabling efficient operation in battery- and intermediate-rail applications such as optical modules and base station FPGAs.
For engineers reviewing the MAX8528EUD+ datasheet, MAX8528EUD+ pinout, MAX8528EUD+ application, or MAX8528EUD+ equivalent, this page provides verified functional identity, confirmed 14-pin TSSOP package mapping, validated POR timing and FB threshold behavior, real-world transient response data (45mV deviation under 20mA→2A step), and two technically documented alternative LDOs with distinct reset functionality.
Technical Context
The MAX8528EUD+ uses an internal p-channel MOSFET pass device with 50mΩ typical on-resistance, eliminating base-drive current and enabling stable 500µA typical ground current across load and dropout conditions. Its feedback architecture centers on a precise 500mV FB threshold with ±1.4% total error over temperature, line, and load - directly supporting accurate adjustable output configuration via external resistor dividers.
Unlike npn-based LDOs, the MAX8528EUD+ sustains fast transient response (45mV overshoot with 10µF ceramic output cap) and high PSRR (>60dB at 1kHz) without sacrificing quiescent current. Its POR output asserts high 150ms after VOUT rises above 90% of nominal value, with open-drain logic requiring external pullup to IN - a function exclusive to the MAX8528 variant within the family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2A continuous - supports high-power FPGA, ASIC, and DSP core rails without thermal derating under typical PCB layout. |
| Dropout Voltage | 200mV max at 2A - enables regulation from 1.7V input to 1.5V output, critical for low-voltage logic supply chains. |
| FB Threshold | 500mV ±7mV - sets output voltage via R1/R2 divider; enables 0.5V–3.4V adjustment with <0.1% resistor tolerance impact. |
| POR Delay | 150ms typical rising delay - provides deterministic system reset timing after power stabilization, compatible with microcontroller reset inputs. |
| Ground Current | 440µA typical operating / <50µA shutdown - minimizes standby power loss in always-on subsystems like network management controllers. |
| Input Range | 1.425V to 3.6V - supports single-cell Li-ion, 1.8V/2.5V/3.3V intermediate rails, and wide-input industrial supplies. |
| Accuracy | ±1.4% over 0°C to +85°C, line, and load - ensures reliable margining for DDR memory VDDQ and CPU I/O rails. |
Pinout & Package
MAX8528EUD+ is housed in a 14-pin TSSOP package (5mm × 6.4mm footprint, 1.1mm profile) with exposed thermal pad (EP) soldered to PCB ground plane for optimal thermal performance. Pin 1 is EN; pins 2–5 are IN; pins 6 and 14 are T.P.; pin 8 is GND; pin 9 is FB; pins 10–13 are OUT; pin 7 is POR.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Active-high logic: connect to IN for always-on operation; pull to GND for <50µA shutdown mode with internal 10kΩ output pull-down. |
| IN (Pins 2–5) | Regulator input supply | Accepts 1.425V–3.6V; requires ≥2.2µF ceramic bypass to GND close to pins to prevent VIN sag during transients. |
| GND (Pin 8) | Power and signal reference | Electrical ground return and thermal conduction path; must be connected to large copper area or ground plane. |
| FB (Pin 9) | Feedback sensing node | Monitors output via resistor divider; regulates to 500mV ±7mV; sets VOUT = 0.5V × (1 + R1/R2). |
| OUT (Pins 10–13) | Regulated output terminals | Four paralleled output pins reduce IR drop and thermal resistance; require ≥10µF ceramic capacitor to GND for 2A stability. |
| POR (Pin 7) | Open-drain power-on reset | Asserts high 150ms after VOUT reaches 90% of target; pulls low instantly on shutdown, fault, or undervoltage - requires external pullup to IN. |
| EP (Exposed Pad) | Thermal dissipation path | Must be soldered to solid GND plane; reduces θJA by >30% versus non-exposed packages, enabling 1.7W dissipation at TA = +70°C. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS Pass Transistor | 50mΩ typical RDS(ON) eliminates base-drive current, enabling 500µA quiescent current even at 2A load and in dropout. |
| Fast Load Transient Response | 45mV output deviation for 20mA→2A step with 10µF ceramic output cap - meets tight regulation requirements for high-speed SerDes supplies. |
| Integrated POR Function | Deterministic 150ms reset assertion after power stabilization - replaces discrete RC reset circuits and improves system boot reliability. |
| Ceramic Capacitor Compatibility | Stable with ≥2.2µF input and ≥10µF output ceramic caps - eliminates need for bulk electrolytics and reduces board area by >50%. |
| Robust Fault Protection | Current limit (3.2A–4.8A) and thermal shutdown (+165°C trip, +150°C recovery) enable safe operation during short-circuit events without latch-up. |
Applications
| Optical Transceivers | Base Station FPGAs |
|---|---|
|
Use Scenario: Powering 25G/100G SFP28 and QSFP28 module laser drivers and TIAs where supply noise and transient response directly impact bit-error rate. IC Role / Device Role / Timing Role: Post-regulator delivering clean, low-noise 1.2V/1.8V bias to analog front-end circuitry with POR-synchronized initialization. Use Value: 45mV transient deviation and >60dB PSRR at 1MHz suppress switching noise from upstream DC/DC converters, reducing jitter-induced BER degradation. |
Use Scenario: Supplying configurable logic (FPGA core and I/O banks) in 4G/5G remote radio units with strict power sequencing and thermal constraints. IC Role / Device Role / Timing Role: Secondary LDO providing sequenced, POR-gated 0.85V core and 1.8V I/O rails after primary DC/DC startup. Use Value: 150ms POR delay aligns with FPGA configuration clock requirements, while 2A capability supports dynamic reconfiguration current surges. |
| Network Switch ASICs | Industrial SSD Controllers |
|
Use Scenario: Regulating high-current 1.0V/1.2V switch fabric and packet processor cores in Layer 3 switches operating at ambient up to +85°C. IC Role / Device Role / Timing Role: Low-dropout, thermally robust LDO handling 2A peak loads with minimal headroom from 1.8V intermediate rail. Use Value: 200mV dropout at 2A allows use of lower-input rails, improving overall system efficiency by ~3% versus higher-dropout alternatives. |
Use Scenario: Powering NVMe SSD controller SoCs during burst write operations where rapid load changes demand stable voltage under thermal stress. IC Role / Device Role / Timing Role: Adjustable-output LDO with POR ensuring controlled reset before NAND flash initialization sequences begin. Use Value: ±1.4% output accuracy over temperature guarantees consistent controller timing margins across -40°C to +85°C industrial operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A8300RGRT | 2A, 50µV RMS noise, 200mV dropout, but no integrated POR; requires external reset IC for sequencing. | Lacks native power-on reset - adds BOM cost and layout complexity for systems needing guaranteed reset timing. | Select when ultra-low noise (<50µV) is prioritized over integrated POR, and external reset generation is acceptable. |
| LT3086EFE#PBF | 2.1A, adjustable, 275mV dropout, integrated current monitor, but no POR; uses external SET resistor instead of FB divider. | No POR output - cannot replace MAX8528EUD+ in designs relying on its 150ms reset assertion for FPGA/ASIC boot. | Choose when current monitoring or wider input range (1.2V–40V) is needed, and POR functionality is handled elsewhere. |
Compared with TPS7A8300RGRT and LT3086EFE#PBF, the MAX8528EUD+ uniquely integrates a 150ms POR output in a 2A, low-dropout package - eliminating external reset components while maintaining ±1.4% accuracy and ceramic-capacitor compatibility essential for space-constrained optical and telecom modules.
Availability
MAX8528EUD+ is available at Aetrix Electronics and suitable for optical transceivers, base station FPGAs, network switch ASICs, industrial SSD controllers, and high-density server VRMs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8528EUD+ 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 MAX8528EUD+ belongs to Maxim's high-current LDO family targeting post-regulation in telecom infrastructure and high-speed digital systems - engineered for low dropout, fast transient response, and integrated power-good/reset signaling.
FAQ
What is the exact power-on reset (POR) timing behavior of the MAX8528EUD+?
The MAX8528EUD+ POR output transitions 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 falls below 90%, or if the device enters shutdown or experiences thermal/short-circuit fault, the POR immediately pulls low. The open-drain POR pin requires an external pullup resistor to IN.
Does the MAX8528EUD+ support ceramic output capacitors, and what is the minimum required value?
Yes, the MAX8528EUD+ is fully stable with ceramic output capacitors. For full 2A output current, a minimum 10µF ceramic capacitor with low ESR is required between OUT and GND. For lower output currents, COUT can be scaled linearly: COUT = IOUT(max) × (1µF / 200mA). A 2.2µF ceramic capacitor is required on the IN pin.
What is the FB voltage accuracy and temperature drift of the MAX8528EUD+?
The MAX8528EUD+ has a nominal FB threshold of 500mV with ±7mV (±1.4%) accuracy over load, line, and temperature (0°C to +85°C). Typical FB voltage drift vs. temperature is ±0.5mV over that range, as shown in Figure toc10 of the datasheet. This tight tolerance enables precise output voltage setting using standard 1% resistors.
How does the MAX8528EUD+ handle thermal overload, and what is its junction temperature limit?
The MAX8528EUD+ features thermal-overload protection that disables the output when junction temperature reaches +165°C (typical trip point). Output resumes when temperature falls to +150°C (typical recovery point). Absolute maximum junction temperature is +150°C for continuous operation. The exposed pad (EP) must be soldered to a ground plane to maintain safe thermal performance at 2A load.
Can the MAX8528EUD+ be used with input voltages below 1.425V?
No. The MAX8528EUD+ has a specified minimum input voltage of 1.425V, enforced by internal undervoltage lockout (UVLO) with 1.35V threshold and 70mV hysteresis. Operation below 1.425V is not guaranteed - output regulation fails, and the device may enter undefined states. Input must remain ≥1.425V for proper FB regulation and POR functionality.
MAX8528EUD+ 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, 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+ FAQ
1.How can I place an order for MAX8528EUD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8528EUD+ 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+ reliable?
The price and inventory of MAX8528EUD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8528EUD+ is usually 5 days.
3.What payment methods are accepted for MAX8528EUD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8528EUD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8528EUD+?
MAX8528EUD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8528EUD+ 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+?
For technical support, including MAX8528EUD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8528EUD+ requirements.
6.How does Aetrix verify that MAX8528EUD+ is sourced from the original manufacturer or authorized distributors?
All MAX8528EUD+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX8528EUD+?
All MAX8528EUD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8528EUD+, 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+ part is unused and in its original packaging.
Return procedure for MAX8528EUD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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