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Analog Devices Inc./Maxim Integrated MAX8511EXK18
- Part No.:
- MAX8511EXK18
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX8511EXK18.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,651
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Product details
Overview
MAX8511EXK18 from Maxim Integrated is a 1.8V fixed-output, 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 and RF power rails in portable battery-powered systems such as Bluetooth radios and digital cameras.
For engineers reviewing the MAX8511EXK18 datasheet, MAX8511EXK18 pinout, MAX8511EXK18 application, or MAX8511EXK18 equivalent, key selection criteria include its 1.8V preset output, SC70-5 package footprint, absence of bypass capacitor requirement, 230µVRMS output noise (100Hz–100kHz), and shutdown current below 1µA.
Technical Context
The MAX8511EXK18 uses a P-channel MOSFET pass transistor (1Ω typical RDS(ON)) enabling low dropout and minimal quiescent current across load and temperature. Its architecture omits the BP pin-unlike the MAX8510-eliminating need for an external bypass capacitor while retaining high PSRR (72dB @ 1kHz, 46dB @ 100kHz).
Internal bandgap reference (1.225V) feeds an error amplifier controlling gate drive to the pass transistor; feedback is internal and fixed at 1.8V. Shutdown logic disables reference, error amp, and driver when SHDN < 0.4V, reducing supply current to ≤0.05µA at +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±3% over load/temperature; enables direct replacement of 1.8V logic and analog rails without external resistors. |
| Max Output Current | 120mA guaranteed; supports moderate-power microcontrollers, RF transceivers, and sensor signal chains. |
| Dropout Voltage | 120mV at 120mA load; allows operation down to VIN = 1.92V, extending usable battery life in single-cell Li-ion or dual-cell alkaline systems. |
| Ground Current | 40µA typical at light load; minimizes standby power loss in always-on subsystems. |
| Output Noise | 230µVRMS (100Hz–100kHz); suitable for powering ADC references, VCOs, and low-noise op-amps where 11µV-level noise (MAX8510) is not required. |
| PSRR | 72dB @ 1kHz, 46dB @ 100kHz; suppresses switching noise from DC-DC converters feeding intermediate supply rails. |
| Shutdown Current | <0.05µA at +85°C; ensures negligible battery drain during deep sleep modes. |
Pinout & Package
MAX8511EXK18 is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm × 0.9mm, 0.65mm pitch), optimized for space-constrained PCB layouts. The exposed pad variant is not used in this part number.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Unregulated input supply | Accepts 2V to 6V input; must be decoupled with ≥1µF ceramic capacitor close to pin. |
| 2 - GND | Ground reference and thermal path | Serves as primary return for load current and heat conduction; requires solid connection to PCB ground plane. |
| 3 - SHDN | Active-low enable control | Pulled low (<0.4V) disables regulator output (high-Z); pulled high (>1.5V) enables regulation; no pull-up required if tied to IN. |
| 4 - N.C. | No internal connection | Not bonded; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress. |
| 5 - OUT | Regulated 1.8V output | Delivers up to 120mA; requires ≥1µF ceramic capacitor to GND; no BP or FB pins present. |
Key Features
| Feature | Design Value |
|---|---|
| No external bypass capacitor required | Eliminates BP pin and 10nF capacitor, reducing BOM count and PCB area versus MAX8510 variants. |
| Stable with 1µF ceramic output capacitor | Enables use of small, low-ESR X5R/X7R MLCCs across full temperature range without stability risk. |
| Low 40µA ground current | Extends battery runtime in portable devices operating at partial load or intermittent duty cycles. |
| Overcurrent and thermal protection | Current limit activates at 130–300mA; thermal shutdown engages at 160°C with 10°C hysteresis, preventing damage under fault conditions. |
| 1.8V fixed output with ±3% accuracy | Meets tight tolerance requirements for core voltage of 1.8V I/O interfaces and low-voltage microcontrollers. |
Applications
| Bluetooth Portable Radios | Digital Cameras |
|---|---|
Use Scenario: Powering RF front-end ICs and baseband processors in compact Bluetooth headsets and audio adapters. IC Role / Device Role / Timing Role: Low-noise 1.8V LDO supplying VDD_IO and PLL core rails, rejecting noise from shared switching supplies. Use Value: 230µVRMS noise and 72dB PSRR at 1kHz prevent reciprocal mixing and phase noise degradation in 2.4GHz receivers. | Use Scenario: Providing clean 1.8V bias to CMOS image sensor interface circuitry and ISP cores during burst capture mode. IC Role / Device Role / Timing Role: Primary analog rail regulator for sensor data path, operating alongside higher-current 2.8V/3.3V rails. Use Value: 120mV dropout enables sustained operation until battery reaches 1.92V, maximizing usable capacity per charge cycle. |
| Portable Audio Players | Cellular Handset Subsystems |
Use Scenario: Supplying DAC, headphone amplifier, and codec analog sections in flash-based MP3 players. IC Role / Device Role / Timing Role: Dedicated low-noise 1.8V source isolating sensitive audio signal chain from noisy digital domains. Use Value: 40µA quiescent current minimizes idle power draw, directly extending playback time between charges. | Use Scenario: Powering SIM card interface, NFC controller, or auxiliary PMIC rails in multi-band GSM/WCDMA handsets. IC Role / Device Role / Timing Role: Secondary LDO for secure element or peripheral logic requiring independent, glitch-free 1.8V supply. Use Value: Shutdown current <0.05µA at +85°C ensures zero leakage impact on standby battery life during extended storage or transport. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS78218DRVT | 1.8V fixed, 150mA, 220mV dropout @ 150mA, 1.4µA IQ, 30µVRMS noise (10Hz–100kHz) | Lower noise and IQ but higher dropout; requires 2.2µF output cap for stability | Select when ultra-low IQ and sub-30µV noise are critical, and board space permits larger output capacitor. |
| MCP1700T-1802E/TT | 1.8V fixed, 250mA, 600mV dropout @ 250mA, 1.6µA IQ, no PSRR/noise spec published | Higher current capability and lower IQ, but significantly higher dropout and unspecified noise performance | Select for cost-sensitive, non-noise-critical 1.8V rails where dropout margin >600mV is acceptable. |
Compared with TPS78218DRVT and MCP1700T-1802E/TT, the MAX8511EXK18 offers the optimal balance of low dropout (120mV), moderate noise (230µVRMS), and proven stability with 1µF ceramics-making it preferred for space-constrained, battery-operated RF/analog systems where both efficiency and signal integrity matter.
Availability
MAX8511EXK18 is available at Aetrix Electronics and suitable for Bluetooth portable radios, digital cameras, portable audio players, and cellular handset subsystems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX8511EXK18 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 space-constrained portable electronics-prioritizing dropout, noise, PSRR, and capacitor simplicity over raw current output.
FAQ
What is the output voltage tolerance of the MAX8511EXK18 over temperature and load?
The MAX8511EXK18 guarantees ±3% output voltage accuracy across load current (100µA to 80mA) and temperature (-40°C to +85°C). At +25°C and 1mA load, initial accuracy is tighter at ±1%. This tolerance ensures reliable operation of 1.8V I/O standards and analog circuits without external trimming.
Does the MAX8511EXK18 require an external bypass capacitor like the MAX8510?
No, the MAX8511EXK18 does not require an external bypass capacitor. Unlike the MAX8510 (which uses a BP pin and 10nF capacitor to achieve 11µVRMS noise), the MAX8511EXK18 omits the BP pin entirely and delivers 230µVRMS noise without any additional capacitor-reducing component count and PCB area.
What package type and dimensions does the MAX8511EXK18 use?
The MAX8511EXK18 is supplied in a 5-pin SC70-5 package measuring 2.0mm × 1.25mm × 0.9mm with 0.65mm lead pitch. It has no exposed thermal pad; the GND pin serves as the sole thermal and electrical ground connection.
Can the MAX8511EXK18 be used with ceramic output capacitors smaller than 1µF?
No-stability is only guaranteed with ≥1µF ceramic output capacitance (X5R or X7R dielectric). Using smaller values risks oscillation or poor transient response. The 1µF minimum applies across all loads and temperatures, per Maxim's validated design guidelines.
How does the shutdown functionality work on the MAX8511EXK18?
The MAX8511EXK18 enters ultra-low-power shutdown when SHDN is pulled below 0.4V (logic low), reducing supply current to ≤0.05µA at +85°C. The output goes high-impedance. To enable, drive SHDN ≥1.5V (e.g., tie directly to IN); no external pull-up resistor is needed for normal operation.
MAX8511EXK18 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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
MAX8511EXK18 FAQ
1.How can I place an order for MAX8511EXK18 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8511EXK18 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 MAX8511EXK18 reliable?
The price and inventory of MAX8511EXK18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8511EXK18 is usually 5 days.
3.What payment methods are accepted for MAX8511EXK18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8511EXK18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8511EXK18?
MAX8511EXK18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8511EXK18 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 MAX8511EXK18?
For technical support, including MAX8511EXK18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8511EXK18 requirements.
6.How does Aetrix verify that MAX8511EXK18 is sourced from the original manufacturer or authorized distributors?
All MAX8511EXK18 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 MAX8511EXK18 meets industry standards.
7.What is the process for return or replacement of MAX8511EXK18?
All MAX8511EXK18 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8511EXK18, 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 MAX8511EXK18 part is unused and in its original packaging.
Return procedure for MAX8511EXK18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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