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Analog Devices Inc./Maxim Integrated MAX8511EXK31+T
- Part No.:
- MAX8511EXK31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX8511EXK31+T.pdf
- Description:
- IC REG LINEAR 3.1V 120MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:90,000
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Product details
Overview
MAX8511EXK31+T from Maxim Integrated is a preset 3.1V, ultra-low-noise, low-dropout linear regulator delivering up to 120mA output current with 135mV dropout at full load, 40μA ground current, and stable operation with only 1μF ceramic output capacitance. It targets noise-sensitive RF and analog circuitry in portable battery-powered systems.
For engineers reviewing the MAX8511EXK31+T datasheet, MAX8511EXK31+T pinout, MAX8511EXK31+T application, or MAX8511EXK31+T 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 capability under industrial temperature range.
Technical Context
The MAX8511EXK31+T uses a P-channel MOSFET pass transistor (typ. RDS(ON) = 1Ω) enabling low dropout and minimal ground current across load and temperature. Its error amplifier compares a 1.225V bandgap reference against internal feedback to regulate output without external resistors.
No BP pin is present - unlike the MAX8510 - eliminating need for bypass capacitor and reducing board area. Shutdown logic disables reference, error amp, and gate drive, dropping supply current below 1μA while placing OUT in high-impedance state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.1V ±3% over full load/temperature range - eliminates external feedback network and simplifies layout. |
| Max Output Current | 120mA continuous - sufficient for powering RF transceivers, ADCs, or low-power microcontrollers. |
| Dropout Voltage | 135mV at 120mA load (for VOUT ≥ 2.5V) - enables operation down to ~3.235V input, extending battery life in single-cell Li-ion systems. |
| Ground Current | 40μA typical at light load - minimizes quiescent power loss critical for always-on sensor nodes. |
| PSRR | 72dB at 1kHz, 65dB at 10kHz, 46dB at 100kHz - suppresses switching noise from DC-DC converters feeding its input. |
| Output Noise | 230μVRMS (100Hz–100kHz) - suitable for analog signal chains where <1mV ripple is required. |
| Input Voltage Range | 2V to 6V - compatible with Li-ion, Li-poly, and dual-AA battery inputs without external pre-regulation. |
Pinout & Package
MAX8511EXK31+T is housed in a 5-pin SC70 package (2.0mm × 1.25mm × 0.95mm), RoHS-compliant, with exposed pad not present (SC70 variant). The GND pin serves dual thermal/electrical function; IN and OUT require 1μF ceramic capacitors for stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Unregulated Input Supply | Accepts 2V–6V input; requires 1μF ceramic capacitor to GND for EMI filtering and transient response. |
| 2 - GND | Ground Reference & Thermal Path | Primary return path and main heat dissipation route; must connect to solid ground plane for thermal reliability. |
| 3 - SHDN | Active-Low Enable Control | Pull ≤0.4V to disable regulator; draws <0.01μA in shutdown - ideal for host-controlled power sequencing. |
| 4 - N.C. | No Internal Connection | Not bonded; no electrical or thermal function - leave unconnected and unpopulated on PCB. |
| 5 - OUT | Regulated Output | Delivers stable 3.1V; bypassed with 1μF ceramic capacitor to GND to ensure stability across all loads. |
Key Features
| Feature | Design Value |
|---|---|
| No Bypass Capacitor Required | Eliminates BP pin and associated 10nF capacitor - reduces component count and saves >0.5mm² board area vs. MAX8510. |
| Stable with 1μF Ceramic Output Cap | Enables use of small, low-ESR X5R/X7R MLCCs without phase-margin risk - simplifies BOM and improves reliability. |
| Ultra-Low Ground Current | 40μA typical at light load and 220μA in dropout - extends runtime in battery-backed real-time clocks and IoT sensors. |
| Integrated Protection | Current limit (130–300mA), thermal shutdown (160°C trip, 10°C hysteresis), and infinite short-circuit tolerance - removes need for external fault management. |
| Industrial Temp Range | -40°C to +85°C operation - qualified for automotive infotainment peripherals, industrial handhelds, and outdoor wireless modules. |
Applications
| Bluetooth Audio Transmitter | Portable Medical Sensor Node |
|---|---|
|
Use Scenario: Powers Bluetooth LE audio codec IC in compact earbud charging case. IC Role / Device Role / Timing Role: Primary 3.1V LDO supplying analog front-end and RF section of BT SoC. Use Value: 230μVRMS noise avoids audible hiss; 72dB PSRR rejects noise from shared 3.3V buck converter; SC70 footprint fits tight space constraints. |
Use Scenario: Supplies precision analog signal chain (ECG amplifier, 16-bit ADC) in wearable patch monitor. IC Role / Device Role / Timing Role: Clean 3.1V rail for low-noise instrumentation amplifiers and reference buffers. Use Value: 40μA ground current extends 2-week battery life; 1μF-stable operation ensures consistent performance across temperature shifts. |
| Wireless LAN Client Module | Digital Camera Image Sensor Bias |
|
Use Scenario: Provides regulated 3.1V to Wi-Fi transceiver IC in compact M.2 module for edge gateway. IC Role / Device Role / Timing Role: Dedicated LDO for RF PHY layer, decoupled from noisy digital core supply. Use Value: 135mV dropout allows operation during brown-out events; 65dB PSRR at 10kHz suppresses DC-DC switching artifacts near 2.4GHz band. |
Use Scenario: Delivers bias voltage to CMOS image sensor's analog pixel array and column ADC. IC Role / Device Role / Timing Role: Low-noise analog supply for sensor analog signal path and timing-critical readout circuits. Use Value: 230μVRMS noise prevents fixed-pattern noise in dark-frame subtraction; SC70 size matches sensor module's miniaturized layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B312MR-G | 3.1V fixed, 150mA, 250mV dropout at 100mA, 65μA IQ, SOT-25 package | Higher dropout and quiescent current; larger SOT-25 footprint | Choose when cost sensitivity outweighs noise/size requirements and board space permits larger package. |
| Analog Devices ADP125ARHZ-3.1-R7 | 3.1V fixed, 500mA, 135mV dropout at 500mA, 30μA IQ, 6-lead SOT-23 | Higher current rating, lower IQ, but larger package and higher minimum load requirement (100μA) | Choose when future-proofing for higher current or tighter IQ is needed, accepting larger footprint and design validation effort. |
Compared with MAX8511EXK31+T, the XC6219B312MR-G trades noise and size for cost, while the ADP125ARHZ-3.1-R7 offers headroom in current and efficiency at the expense of board area and compatibility with ultra-low-load systems.
Availability
MAX8511EXK31+T is available at Aetrix Electronics and suitable for Bluetooth portable radios, wireless LAN client modules, portable medical sensors, and digital camera subsystems requiring stable component supply with lead-free compliance and industrial temperature support.
Supply support for MAX8511EXK31+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 high-performance analog, mixed-signal, and power-management ICs for demanding industrial, communications, and consumer applications.
The MAX8510/MAX8511/MAX8512 family was engineered specifically for space-constrained, battery-powered devices needing ultra-low noise, high PSRR, and minimal external components - targeting RF, audio, and precision analog subsystems.
FAQ
What is the output voltage tolerance of the MAX8511EXK31+T over temperature and load?
The MAX8511EXK31+T guarantees ±3% output voltage accuracy across the full -40°C to +85°C operating temperature range and for output currents from 100μA to 80mA. At room temperature and 1mA load, accuracy tightens to ±1%. This ensures reliable operation for 3.1V-dependent logic and analog circuits without external trimming.
Does the MAX8511EXK31+T require an external bypass capacitor like the MAX8510?
No, the MAX8511EXK31+T does not require an external bypass capacitor. Unlike the MAX8510 (which uses a BP pin and 10nF capacitor for noise reduction), the MAX8511EXK31+T omits the BP pin entirely and achieves its specified 230μVRMS noise without additional components - simplifying layout and reducing BOM count.
Can the MAX8511EXK31+T be used with ceramic capacitors smaller than 1μF?
No - the MAX8511EXK31+T is specified and tested for stability only with ≥1μF ceramic output capacitance (X5R/X7R dielectric). Using smaller values risks oscillation or degraded transient response. Input capacitance also requires ≥1μF ceramic; both caps must be placed close to the IN and OUT pins per layout guidelines.
What is the shutdown current specification for the MAX8511EXK31+T?
The MAX8511EXK31+T draws less than 1μA total supply current when SHDN is pulled low (≤0.4V). At +85°C, shutdown current remains below 0.05μA. This ultra-low leakage supports long-term storage and battery preservation in always-off modes for portable equipment.
Is the MAX8511EXK31+T pin-compatible with other members of the MAX851x family?
No - the MAX8511EXK31+T is not pin-compatible with the MAX8510 or MAX8512. While all three share the same SC70-5 pinout numbering, the BP pin (pin 4) on the MAX8510 is N.C. on the MAX8511EXK31+T, and the FB pin (pin 4) on the MAX8512 is also N.C. here. Swapping parts requires PCB revision due to functional pin mapping differences.
MAX8511EXK31+T 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:
- Active
- 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+T FAQ
1.How can I place an order for MAX8511EXK31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8511EXK31+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 MAX8511EXK31+T reliable?
The price and inventory of MAX8511EXK31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8511EXK31+T is usually 5 days.
3.What payment methods are accepted for MAX8511EXK31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8511EXK31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8511EXK31+T?
MAX8511EXK31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8511EXK31+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 MAX8511EXK31+T?
For technical support, including MAX8511EXK31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8511EXK31+T requirements.
6.How does Aetrix verify that MAX8511EXK31+T is sourced from the original manufacturer or authorized distributors?
All MAX8511EXK31+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 MAX8511EXK31+T meets industry standards.
7.What is the process for return or replacement of MAX8511EXK31+T?
All MAX8511EXK31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8511EXK31+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 MAX8511EXK31+T part is unused and in its original packaging.
Return procedure for MAX8511EXK31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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