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Analog Devices Inc./Maxim Integrated MAX8511EXK25+T
- Part No.:
- MAX8511EXK25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX8511EXK25+T.pdf
- Description:
- IC REG LINEAR 2.5V 120MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,139
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Product details
Overview
MAX8511EXK25+T from Maxim Integrated is a 2.5V fixed-output, ultra-low-noise, low-dropout linear regulator delivering up to 120mA with 120mV dropout at full load and 40μA ground current. It uses a P-channel MOSFET pass element, requires no bypass capacitor, and is stable with only 1μF ceramic output capacitance - ideal for space-constrained battery-powered audio and RF subsystems.
For engineers reviewing the MAX8511EXK25+T datasheet, MAX8511EXK25+T pinout, MAX8511EXK25+T application, or MAX8511EXK25+T equivalent, key selection criteria include its 2.5V preset output, SC70-5 package footprint, shutdown current <1μA, PSRR of 72dB at 1kHz, and absence of BP pin - distinguishing it from the noise-optimized MAX8510 family.
Technical Context
The MAX8511EXK25+T implements a P-channel MOSFET series pass transistor with 1Ω typical RDS(ON), enabling low dropout and eliminating base-drive current loss. Its error amplifier compares a 1.225V bandgap reference against internal feedback to regulate output without external resistors.
Shutdown logic disables the voltage reference, error amplifier, and gate driver when SHDN is pulled low, reducing supply current to <1μA. Thermal protection activates at +160°C with 10°C hysteresis, and current limiting holds output at 130–300mA during overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2% over 100μA–80mA load and temperature (−40°C to +85°C) |
| Max Output Current | 120mA continuous; current limit 130–300mA ensures safe short-circuit operation |
| Dropout Voltage | 120mV at 120mA load (VIN ≥ 2.7V), enabling operation down to near-end-of-life battery voltages |
| Ground Current | 40μA typical at light load; rises to 220μA in dropout - critical for multi-day battery life |
| PSRR | 72dB at 1kHz, 46dB at 100kHz - suppresses switching noise from upstream DC/DC converters |
| Output Noise | 230μVRMS (100Hz–100kHz) - suitable for analog sensor and low-noise ADC power rails |
| Shutdown Current | <1μA - enables zero-power sleep modes in portable devices |
Pinout & Package
MAX8511EXK25+T is housed in a RoHS-compliant 5-pin SC70 package (2.0mm × 1.25mm × 0.9mm), with exposed pad not present. The GND pin serves dual thermal/electrical function and must connect to a large copper area for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Unregulated input supply | Accepts 2V to 6V; requires 1μF ceramic input capacitor for stability and transient suppression |
| 2 - GND | Ground reference and thermal path | Must be connected to PCB ground plane; primary heat conduction path in SC70 package |
| 3 - SHDN | Active-low shutdown control | Pull ≤0.4V to disable regulator; logic high ≥1.5V enables operation; draws <0.01μA bias current |
| 4 - N.C. | No internal connection | Not bonded; must remain unconnected - no routing or pull-up/pull-down allowed |
| 5 - OUT | Regulated 2.5V output | Stable with 1μF ceramic capacitor; high-impedance during shutdown; supports 120mA load |
Key Features
| Feature | Design Value |
|---|---|
| No-bypass architecture | Eliminates BP pin and external 10nF capacitor - reduces BOM count and PCB area by >15% vs. MAX8510 |
| P-channel MOSFET pass device | Zero base-drive current loss enables 40μA quiescent current - extends battery runtime in always-on sensors |
| 1μF ceramic capacitor stability | Enables use of low-cost, small-footprint X5R/X7R MLCCs without ESR constraints or temperature derating |
| Integrated protection | Thermal shutdown (160°C) and current limiting prevent damage during fault conditions - no external circuitry needed |
| Low-noise regulation | 230μVRMS output noise meets requirements for powering 16-bit SAR ADCs and RF front-end LDOs |
Applications
| Cellular Phone RF Power Amplifier Bias | Digital Camera Image Sensor Core Supply |
|---|---|
|
Use Scenario: Powers RF PA bias rail in GSM/UMTS handsets where switching noise from PMIC must be suppressed. IC Role / Device Role / Timing Role: Low-noise post-regulator isolating PA from noisy buck converter outputs. Use Value: 72dB PSRR at 1kHz attenuates 2MHz–5MHz switching artifacts, preventing spectral regrowth and ACLR degradation. |
Use Scenario: Supplies 2.5V core voltage to CMOS image sensor with rolling shutter timing constraints. IC Role / Device Role / Timing Role: Stable, low-noise LDO ensuring pixel reset consistency and dark current stability. Use Value: 230μVRMS noise prevents fixed-pattern noise (FPN) and enables >68dB SNR in 12-bit RAW output. |
| Bluetooth Audio DAC Reference Supply | Portable Medical Pulse Oximeter Analog Front-End |
|
Use Scenario: Provides clean 2.5V reference to stereo DAC in Bluetooth earbuds with tight THD+N targets. IC Role / Device Role / Timing Role: Ultra-low-noise analog supply decoupling DAC from shared system rail. Use Value: Enables THD+N ≤ −95dB (20Hz–20kHz) without additional RC filtering - saves board space and cost. |
Use Scenario: Powers transimpedance amplifier and LED driver in battery-operated pulse oximeters. IC Role / Device Role / Timing Role: Precision analog supply maintaining signal integrity during photodiode current measurement. Use Value: 40μA ground current extends single-CR2032 battery life to >72 hours continuous operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS78225DRVR | 2.5V fixed, 150mA, 170mV dropout @150mA, 250nA shutdown current, 30μVRMS noise | Lower noise but requires 2.2μF output cap; larger 6-pin WSON package (2mm × 2mm) | Choose for ultra-low-noise medical analog rails where PCB area is secondary to noise performance |
| MCP1700T-2502E/TT | 2.5V fixed, 250mA, 600mV dropout @250mA, 1.6μA quiescent, no thermal shutdown | Higher dropout limits usable battery range; lacks overtemperature protection | Choose for cost-sensitive industrial controls where 2.7V minimum input is guaranteed |
Compared with TPS78225DRVR and MCP1700T-2502E/TT, MAX8511EXK25+T delivers optimal balance of low dropout (120mV), ultra-low quiescent current (40μA), and compact SC70-5 footprint - making it preferred for space- and battery-limited portable RF and imaging systems.
Availability
MAX8511EXK25+T is available at Aetrix Electronics and suitable for cellular phone RF biasing, digital camera sensor powering, Bluetooth audio DAC referencing, and portable medical analog front-end applications requiring stable component supply across extended production lifecycles.
Supply support for MAX8511EXK25+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 consumer applications.
The MAX8510/MAX8511/MAX8512 family was engineered specifically for ultra-low-noise, low-quiescent-current regulation in battery-powered portable electronics - prioritizing small size, minimal external components, and robust protection.
FAQ
What is the maximum input voltage rating for MAX8511EXK25+T?
The MAX8511EXK25+T has an absolute maximum input voltage of +7V referenced to GND. However, its operational input range is specified from 2V to 6V. Exceeding 6V may cause excessive power dissipation or violate thermal limits, especially at high load currents. Always maintain VIN ≤ 6V in normal operation to ensure reliability and compliance with datasheet specifications for MAX8511EXK25+T.
Does MAX8511EXK25+T require an external bypass capacitor on the BP pin?
No, MAX8511EXK25+T does not include a BP (bypass) pin and requires no external bypass capacitor. Unlike the MAX8510 variant, the MAX8511EXK25+T uses an internal noise-reduction architecture that eliminates the need for a BP capacitor - simplifying layout and reducing component count. This design choice is confirmed in the Pin Description table and General Description section of the MAX8511EXK25+T datasheet.
What is the thermal shutdown threshold and hysteresis for MAX8511EXK25+T?
The MAX8511EXK25+T activates thermal shutdown at a junction temperature of +160°C and exhibits 10°C hysteresis - meaning the device resumes regulation only after cooling to +150°C. This behavior is guaranteed across the full operating temperature range (−40°C to +85°C) and protects against sustained overload or poor PCB thermal design. The thermal sensor is integrated directly into the die of MAX8511EXK25+T.
Can MAX8511EXK25+T be used with ceramic capacitors smaller than 1μF?
No - the MAX8511EXK25+T is characterized and guaranteed stable only with ≥1μF ceramic output capacitance (X5R or X7R dielectric). Using smaller values risks instability, oscillation, or degraded transient response. The datasheet explicitly states "stable with 1μF ceramic capacitor for any load" and provides ESR stability boundaries confirming this minimum. Deviating from 1μF violates the validated operating condition for MAX8511EXK25+T.
Is MAX8511EXK25+T pin-compatible with other variants in the MAX851x family?
MAX8511EXK25+T shares identical SC70-5 pinout with MAX8510 and MAX8512 variants in the same package, but functional pin assignments differ: BP (pin 4) is N.C. on MAX8511EXK25+T, whereas it is active on MAX8510 and FB is active on MAX8512. Thus, while physical footprint matches, direct substitution requires verification of pin function mapping and external circuit compatibility for MAX8511EXK25+T.
MAX8511EXK25+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.135V @ 120mA (Typ)
- Current - Output:
- 120mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- PSRR:
- 72dB ~ 46dB (1kHz ~ 100kHz)
- Control Features:
- Shutdown
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
MAX8511EXK25+T FAQ
1.How can I place an order for MAX8511EXK25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8511EXK25+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 MAX8511EXK25+T reliable?
The price and inventory of MAX8511EXK25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8511EXK25+T is usually 5 days.
3.What payment methods are accepted for MAX8511EXK25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8511EXK25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8511EXK25+T?
MAX8511EXK25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8511EXK25+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 MAX8511EXK25+T?
For technical support, including MAX8511EXK25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8511EXK25+T requirements.
6.How does Aetrix verify that MAX8511EXK25+T is sourced from the original manufacturer or authorized distributors?
All MAX8511EXK25+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 MAX8511EXK25+T meets industry standards.
7.What is the process for return or replacement of MAX8511EXK25+T?
All MAX8511EXK25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8511EXK25+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 MAX8511EXK25+T part is unused and in its original packaging.
Return procedure for MAX8511EXK25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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