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Analog Devices Inc./Maxim Integrated MAX8511EXK89
- Part No.:
- MAX8511EXK89
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX8511EXK89.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,464
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Product details
Overview
MAX8511EXK89 from Maxim Integrated is a preset 2.9V, 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.
For engineers reviewing the MAX8511EXK89 datasheet, MAX8511EXK89 pinout, MAX8511EXK89 application, or MAX8511EXK89 equivalent, key selection criteria include its 2.9V fixed output, SC70-5 package footprint, no-bypass-capacitor architecture, 230µVRMS output noise (vs. MAX8510's 11µV), and compatibility with low-ESR ceramic output capacitors in space-constrained designs.
Technical Context
The MAX8511EXK89 uses a P-channel MOSFET series pass transistor with 1Ω typical RDS(ON), enabling low dropout and eliminating base-drive current loss. Its internal feedback network fixes the output at 2.9V, and it omits the BP (bypass) pin found on the MAX8510-removing the need for an external 10nF capacitor and reducing PCB area.
Shutdown is controlled via the SHDN pin, which reduces supply current to below 1µA when pulled low. Thermal shutdown activates at +160°C with 10°C hysteresis, and overcurrent protection limits output to 130–300mA depending on conditions, allowing indefinite short-circuit tolerance without damage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.9V ±3% over -40°C to +85°C - ensures stable biasing for 2.85V–3.0V logic or analog circuitry without external resistors. |
| Max Output Current | 120mA continuous - sufficient for powering RF front-ends, ADCs, or low-power microcontrollers in portable devices. |
| Dropout Voltage | 120mV at 120mA load - enables operation down to VIN = 3.02V, extending usable battery life in single-cell Li-ion or dual-cell alkaline systems. |
| Ground Current | 40µA typical at light load - minimizes quiescent drain during standby, critical for multi-week battery runtime in always-on sensors. |
| PSRR | 72dB at 1kHz, 46dB at 100kHz - suppresses switching noise from DC/DC converters feeding the input rail, protecting sensitive analog stages. |
| Output Noise | 230µVRMS (100Hz–100kHz) - significantly lower than standard LDOs, suitable for powering VCOs, PLLs, and high-resolution ADCs. |
| Input Voltage Range | 2.0V to 6.0V - supports direct connection to Li-ion (2.7–4.2V), LiFePO4 (2.0–3.6V), or regulated 3.3V/5V supplies. |
Pinout & Package
MAX8511EXK89 is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm × 0.95mm, 0.65mm pitch), with exposed pad not present (TDFN variant uses EP). The pinout is validated per Maxim's official pin description table and functional diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Unregulated Input Supply | Accepts 2.0V–6.0V input; requires 1µF ceramic capacitor to GND for stability and line transient suppression. |
| 2 (GND) | Ground Reference | Primary return path for load current and internal circuitry; must connect to low-impedance ground plane to ensure thermal and noise performance. |
| 3 (SHDN) | Active-Low Shutdown Control | Pull ≤0.4V to disable regulator (IQ < 1µA); tie to IN for always-on operation; 0.01µA max input bias avoids leakage-induced wake-up. |
| 4 (N.C.) | No Connection | Not internally bonded; must remain floating - no routing or soldering allowed to avoid parasitic coupling or mechanical stress. |
| 5 (OUT) | Regulated Output | Delivers 2.9V ±3%; bypassed with 1µF ceramic capacitor to GND; supports fast load transients up to 50mA step with <10mV deviation. |
Key Features
| Feature | Design Value |
|---|---|
| No external bypass capacitor required | Eliminates BP pin and 10nF capacitor - reduces BOM count, PCB area, and assembly cost vs. MAX8510 while maintaining robust noise performance. |
| Stable with 1µF ceramic output capacitor | Enables use of small, low-cost X5R/X7R MLCCs across full temperature range - no minimum ESR constraints or secondary compensation networks needed. |
| Ultra-low ground current (40µA) | Minimizes standby power loss - extends battery life in intermittently active IoT nodes where sleep current dominates total energy budget. |
| Thermal and overcurrent protection | Guarantees safe operation under fault conditions: +160°C shutdown with 10°C hysteresis and 130–300mA current limiting prevent thermal runaway or device destruction. |
| Low 120mV dropout at 120mA | Maximizes usable battery voltage range - allows full 120mA delivery until input drops to 3.02V, increasing effective capacity in single-cell Li-ion applications by ~8%. |
Applications
| RF Front-End Power | Portable Audio Codec Supply |
|---|---|
Use Scenario: Powering low-noise amplifiers (LNAs) and mixers in Bluetooth/WLAN transceivers where supply ripple directly modulates RF output. IC Role / Device Role / Timing Role: Clean 2.9V bias rail isolating RF signal chain from noisy DC/DC converter outputs. Use Value: 230µVRMS noise and 46dB PSRR at 100kHz suppress switching artifacts, improving receiver sensitivity by ≥2dB in 2.4GHz band. | Use Scenario: Supplying stereo audio DACs and headphone amplifiers in wireless earbuds requiring low THD+N and zero audible hiss. IC Role / Device Role / Timing Role: Low-noise post-regulator cleaning switched-mode supply feeding analog audio paths. Use Value: 72dB PSRR at 1kHz attenuates DC/DC ripple from 1MHz converters, reducing DAC output noise floor by 15µVRMS. |
| Medical Sensor Signal Conditioning | Industrial Wireless Node MCU Core Rail |
Use Scenario: Biasing precision instrumentation amplifiers and 24-bit sigma-delta ADCs in portable ECG or pulse oximeter modules. IC Role / Device Role / Timing Role: Ultra-stable 2.9V reference rail minimizing offset drift and quantization error in analog front-end. Use Value: ±3% output accuracy over temperature and 0.003%/mA load regulation maintain ADC gain stability within 0.05% across 1–100mA load swings. | Use Scenario: Powering ARM Cortex-M0+ microcontroller cores in battery-operated IIoT edge nodes with multi-year deployment requirements. IC Role / Device Role / Timing Role: Primary core voltage regulator enabling deep-sleep modes with sub-1µA shutdown current. Use Value: 40µA ground current and <1µA shutdown draw extend CR2032 coin cell life to >3 years in 10s-of-seconds wake-up intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS78229DRVR | 2.9V fixed, 150mA, 175mV dropout @150mA, 1.7µA IQ in shutdown, 30µA quiescent, 250µVRMS noise | Higher dropout and slightly higher noise; requires 2.2µF output cap for stability | Preferred when lower shutdown current (<2µA) is mandatory and board space allows larger output capacitor. |
| MCP1700-2902E/TO | 2.9V fixed, 250mA, 600mV dropout @250mA, 1.3µA IQ in shutdown, 18µA quiescent, no PSRR spec beyond 1kHz | Higher dropout, lower PSRR above 1kHz, no 100kHz PSRR or noise data published | Suitable for non-noise-critical digital rails where cost is primary driver and input headroom exceeds 0.6V. |
Compared with TPS78229DRVR and MCP1700-2902E/TO, MAX8511EXK89 offers superior noise performance (230µVRMS vs. 250µV/undocumented), lower dropout (120mV vs. 175mV/600mV), and guaranteed 100kHz PSRR - making it optimal for RF and precision analog applications where supply integrity directly impacts system SNR.
Availability
MAX8511EXK89 is available at Aetrix Electronics and suitable for RF front-end power, portable audio codec supply, medical sensor signal conditioning, and industrial wireless node MCU core rail applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8511EXK89 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 industrial, communications, and consumer markets.
The MAX8510/MAX8511/MAX8512 family was designed specifically for ultra-low-noise, low-quiescent-current regulation in space-constrained, battery-powered portable electronics - prioritizing noise, PSRR, and minimal external components over raw current capability.
FAQ
What is the output voltage tolerance of the MAX8511EXK89 over temperature and load?
The MAX8511EXK89 guarantees ±3% output voltage accuracy over the full -40°C to +85°C operating temperature range and for load currents from 100µA to 80mA. At 25°C and 1mA load, tolerance tightens to ±1%. This stability ensures reliable operation of 2.85V–3.0V logic interfaces and analog circuits without external trimming.
Does the MAX8511EXK89 require an external bypass capacitor like the MAX8510?
No, the MAX8511EXK89 does not require an external bypass capacitor. Unlike the MAX8510 (which uses a BP pin and 10nF capacitor to achieve 11µVRMS noise), the MAX8511EXK89 omits the BP pin entirely and achieves 230µVRMS noise through optimized internal design - simplifying layout and reducing component count while maintaining suitability for most RF and audio applications.
What is the maximum allowable input voltage for the MAX8511EXK89?
The absolute maximum input voltage for the MAX8511EXK89 is +7V referenced to GND. However, the recommended operating input voltage range is 2.0V to 6.0V. Exceeding 6.0V risks violating internal voltage ratings and may trigger overvoltage protection or cause permanent damage, even if within the absolute maximum rating for brief transients.
Can the MAX8511EXK89 be used with ceramic output capacitors smaller than 1µF?
No - the MAX8511EXK89 is specified and tested for stability only with a minimum 1µF ceramic output capacitor (X5R or X7R dielectric). Using smaller values (e.g., 0.47µF) risks oscillation or excessive load-transient overshoot, especially at high temperatures or near dropout. The 1µF requirement is a hard design constraint, not a recommendation.
How does the shutdown functionality of the MAX8511EXK89 behave during power-up?
During power-up, the MAX8511EXK89 enters active regulation only after the input voltage exceeds ~1.8V and the internal bandgap reference stabilizes. If SHDN is held low during this period, the device remains disabled until SHDN rises above 1.5V (logic high threshold). The shutdown exit delay is 300µs (typical), ensuring clean, glitch-free output ramp-up without undershoot or oscillation.
MAX8511EXK89 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):
- 2.9V
- 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:
- Enable
- 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
MAX8511EXK89 FAQ
1.How can I place an order for MAX8511EXK89 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8511EXK89 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 MAX8511EXK89 reliable?
The price and inventory of MAX8511EXK89 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8511EXK89 is usually 5 days.
3.What payment methods are accepted for MAX8511EXK89?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8511EXK89 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8511EXK89?
MAX8511EXK89 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8511EXK89 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 MAX8511EXK89?
For technical support, including MAX8511EXK89 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8511EXK89 requirements.
6.How does Aetrix verify that MAX8511EXK89 is sourced from the original manufacturer or authorized distributors?
All MAX8511EXK89 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 MAX8511EXK89 meets industry standards.
7.What is the process for return or replacement of MAX8511EXK89?
All MAX8511EXK89 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8511EXK89, 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 MAX8511EXK89 part is unused and in its original packaging.
Return procedure for MAX8511EXK89:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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