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Analog Devices Inc./Maxim Integrated MAX8511EXK31+
- Part No.:
- MAX8511EXK31+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX8511EXK31+.pdf
- Description:
- IC REG LINEAR 3.1V 120MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,951
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Product details
Overview
MAX8511EXK31+ from Maxim Integrated is a preset 3.1V, ultra-low-noise, low-dropout linear regulator delivering up to 120mA output current with 120mV dropout at full load, 40µA ground current, and stable operation with only 1µF ceramic capacitors. It targets noise-sensitive analog rails in portable radios and digital cameras.
For engineers reviewing the MAX8511EXK31+ datasheet, MAX8511EXK31+ pinout, MAX8511EXK31+ application, or MAX8511EXK31+ equivalent, key selection criteria include its 3.1V fixed output, SC70-5 package footprint, absence of bypass capacitor requirement, 72dB PSRR at 1kHz, and guaranteed 120mA output under -40°C to +85°C.
Technical Context
The MAX8511EXK31+ uses a P-channel MOSFET pass transistor (typ. 1Ω 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 voltage without external resistors.
No BP (bypass) pin is present-unlike the MAX8510-so output noise is not reduced via external capacitor; instead, it achieves 230µVRMS noise (100Hz–100kHz) and 72dB PSRR at 1kHz. Shutdown logic disables reference, error amp, and gate drive, reducing supply current to <1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.1V ±3% over -40°C to +85°C; eliminates need for external feedback network. |
| Max Output Current | 120mA continuous; supports RF power amplifiers and image sensors without derating. |
| Dropout Voltage | 120mV at 120mA load; enables operation down to VIN = 3.22V while maintaining regulation. |
| Ground Current | 40µA typical at light load; extends battery life in standby mode of portable devices. |
| PSRR | 72dB at 1kHz; suppresses switching noise from DC-DC converters feeding its input. |
| Output Noise | 230µVRMS (100Hz–100kHz); suitable for ADC reference supplies and low-noise audio bias rails. |
| Input Voltage Range | 2V to 6V; compatible with single-cell Li-ion (3.0–4.2V), dual-cell alkaline (2.4–3.2V), and 3.3V/5V system rails. |
| Shutdown Current | <1µA; enables deep-sleep modes in Bluetooth accessories and wireless LAN modules. |
Pinout & Package
MAX8511EXK31+ is housed in a RoHS-compliant 5-pin SC70-5 package (2.0mm × 1.25mm × 0.9mm), with exposed pad omitted-unlike the TDFN variant-and requires no thermal pad connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Unregulated input supply | Accepts 2V–6V; must be decoupled with ≥1µF ceramic capacitor near pin. |
| 2 - GND | Ground reference and thermal path | Primary return for load current and regulator core; connect to solid ground plane. |
| 3 - SHDN | Active-low shutdown control | Pull ≤0.4V to disable regulator; high-Z output and <1µA quiescent current result. |
| 4 - N.C. | No internal connection | Not bonded; leave unconnected-no routing or stub traces permitted. |
| 5 - OUT | Regulated 3.1V output | Delivers up to 120mA; bypass with ≥1µF ceramic capacitor to GND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| No bypass capacitor required | Eliminates BP pin and external 10nF capacitor-reducing BOM count and PCB area vs. MAX8510. |
| Stable with 1µF ceramic output cap | Enables use of small, low-ESR X5R/X7R MLCCs across full temperature range without instability risk. |
| Thermal and overcurrent protection | Shuts down at 160°C junction temp with 10°C hysteresis; survives indefinite output short-circuit. |
| Low ground current across load | 40µA at light load and 220µA in dropout-minimizes wasted battery capacity in portable systems. |
| High PSRR at audio frequencies | 72dB rejection at 1kHz allows clean power delivery to sensitive analog front-ends adjacent to noisy digital ICs. |
Applications
| Bluetooth Audio Transceiver | Digital Camera Image Sensor Bias |
|---|---|
Use Scenario: Powering the RF transceiver IC and audio codec in compact Bluetooth headsets. IC Role / Device Role / Timing Role: Low-noise 3.1V supply for VCO tuning voltage and ADC reference inputs. Use Value: 230µVRMS noise prevents spurious tones in audio output; 72dB PSRR blocks DC-DC ripple from affecting RF phase noise. |
Use Scenario: Providing regulated bias to CMOS image sensor analog signal chain in 1080p camcorders. IC Role / Device Role / Timing Role: Stable 3.1V rail for column amplifier and correlated double sampling circuitry. Use Value: 120mV dropout enables operation until battery drops to 3.22V; 40µA ground current extends recording time between charges. |
| Portable Medical Pulse Oximeter | Industrial Handheld Scanner |
Use Scenario: Supplying photodiode amplifier and analog front-end in battery-powered oximeters. IC Role / Device Role / Timing Role: Ultra-low-noise 3.1V source for transimpedance amplifier and ADC driver stages. Use Value: 230µVRMS noise floor ensures accurate SpO₂ calculation; SC70-5 footprint fits tight optical module layouts. |
Use Scenario: Powering laser diode driver and decode ASIC in rugged barcode scanners. IC Role / Device Role / Timing Role: Primary 3.1V rail for high-speed logic and analog interface circuits during intermittent scan bursts. Use Value: 120mA capability handles peak laser pulse currents; shutdown mode reduces idle power to <1µA between scans. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS78031DRVR | 3.1V fixed, 150mA, 250mV dropout at 150mA, 500nA shutdown current, SOT-563 package. | Lower quiescent current but higher dropout and larger package; less suitable for space-constrained 120mA loads near battery end-of-life. | Select when nano-power shutdown dominates over dropout and size constraints. |
| MCP1700T-3102E/TT | 3.1V fixed, 250mA, 600mV dropout at 250mA, 1.6µA quiescent, SOT-23-3 package. | Higher dropout and no thermal shutdown; lacks PSRR/noise specs for precision analog use. | Choose for cost-sensitive, non-noise-critical digital I/O rails where 600mV dropout is acceptable. |
Compared with TPS78031DRVR and MCP1700T-3102E/TT, the MAX8511EXK31+ uniquely balances ultra-low noise (230µVRMS), low dropout (120mV), and minimal footprint (SC70-5) for analog-intensive portable designs-without compromising thermal or overcurrent safety.
Availability
MAX8511EXK31+ is available at Aetrix Electronics and suitable for Bluetooth portable radios, digital cameras, portable medical monitors, industrial handheld scanners, and battery-powered audio accessories requiring stable component supply across extended temperature ranges.
Supply support for MAX8511EXK31+ 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 consumer applications.
The MAX8510/MAX8511/MAX8512 family was designed specifically for space-constrained, battery-powered systems needing ultra-low-noise, low-quiescent-current LDO regulation-targeting RF, imaging, and precision analog subsystems.
FAQ
What is the output voltage tolerance of the MAX8511EXK31+ over temperature and load?
The MAX8511EXK31+ maintains ±3% output voltage accuracy across -40°C to +85°C ambient temperature and for load currents from 100µA to 80mA. At 120mA, deviation remains within specification limits per the Electrical Characteristics table, ensuring reliable operation in portable equipment with varying thermal and load conditions.
Does the MAX8511EXK31+ require an external bypass capacitor like the MAX8510?
No, the MAX8511EXK31+ does not include a BP (bypass) pin and therefore requires no external 10nF capacitor for noise reduction. Its architecture achieves 230µVRMS output noise (100Hz–100kHz) without it-simplifying layout and reducing component count compared to the MAX8510.
Can the MAX8511EXK31+ be used with ceramic output capacitors smaller than 1µF?
No-stability is guaranteed only with ≥1µF ceramic output capacitance (X5R or X7R dielectric). Using smaller values risks oscillation, especially under transient load conditions. The device's compensation is optimized for this minimum value, as confirmed in the Capacitor Selection section of the datasheet.
What is the maximum allowable input voltage for the MAX8511EXK31+?
The absolute maximum input voltage for the MAX8511EXK31+ is +7V, but the recommended operating range is 2V to 6V. Exceeding 6V may trigger internal protection or degrade long-term reliability; for 5V system rails, operation is fully supported with margin.
How does the shutdown functionality of the MAX8511EXK31+ behave during power-up?
The MAX8511EXK31+ features built-in power-on reset behavior: when SHDN is pulled high after power application, the output ramps up with controlled slew rate and reaches 90% of 3.1V within 300µs. No external sequencing is needed-the device self-manages startup timing and avoids output overshoot.
MAX8511EXK31+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3.1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.12V @ 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
MAX8511EXK31+ FAQ
1.How can I place an order for MAX8511EXK31+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8511EXK31+ 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 MAX8511EXK31+ reliable?
The price and inventory of MAX8511EXK31+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8511EXK31+ is usually 5 days.
3.What payment methods are accepted for MAX8511EXK31+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8511EXK31+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8511EXK31+?
MAX8511EXK31+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8511EXK31+ 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 MAX8511EXK31+?
For technical support, including MAX8511EXK31+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8511EXK31+ requirements.
6.How does Aetrix verify that MAX8511EXK31+ is sourced from the original manufacturer or authorized distributors?
All MAX8511EXK31+ 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 MAX8511EXK31+ meets industry standards.
7.What is the process for return or replacement of MAX8511EXK31+?
All MAX8511EXK31+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8511EXK31+, 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 MAX8511EXK31+ part is unused and in its original packaging.
Return procedure for MAX8511EXK31+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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