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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:2,405
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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 rails in portable radios and digital cameras where compact size and battery efficiency are critical.
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, absence of bypass capacitor requirement, 72dB PSRR at 1kHz, and guaranteed 120mA output capability under industrial temperature range.
Technical Context
The MAX8511EXK89+ 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 external bypass capacitance while retaining high PSRR and low noise performance.
Shutdown logic disables reference, error amplifier, and gate drive when SHDN is pulled low, reducing supply current below 1µA. Internal thermal shutdown activates at +160°C with 10°C hysteresis, and current limiting protects against sustained short-circuit conditions up to 300mA.
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 RF ICs without external feedback components. |
| Max Output Current | 120mA guaranteed - supports moderate-power analog subsystems like ADC drivers or RF front-end biasing without derating. |
| 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 standby power loss in always-on sensor nodes or Bluetooth accessories. |
| PSRR | 72dB at 1kHz, 46dB at 100kHz - suppresses switching noise from DC-DC converters feeding intermediate supply rails. |
| Input Voltage Range | 2V to 6V - compatible with wide-input battery sources including LiFePO4, Li-ion, and regulated 3.3V/5V system rails. |
| Shutdown Current | <1µA - enables deep-sleep modes in portable devices without compromising wake-up latency or residual drain. |
Pinout & Package
MAX8511EXK89+ is housed in a lead-free 5-pin SC70-5 package (2.0mm × 1.25mm × 0.95mm), optimized for space-constrained PCB layouts. The exposed pad variant is not used in this part; thermal dissipation relies on GND pin conduction through standard copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Unregulated input supply | Accepts 2V–6V input; requires 1µF ceramic capacitor to GND for stability and line-transient suppression. |
| 2 (GND) | Ground reference and thermal path | Primary return path for load current and internal circuitry; must connect to large copper area for thermal management. |
| 3 (SHDN) | Active-low enable control | Pull ≤0.4V to disable regulator; connects to IN for always-on operation; input bias current <0.1µA enables direct MCU GPIO drive. |
| 4 (N.C.) | No internal connection | Not bonded; must remain unconnected-no routing or stitching required. |
| 5 (OUT) | Regulated 2.9V output | Delivers up to 120mA; bypassed with 1µF ceramic capacitor to GND; no BP pin eliminates external noise-reduction cap. |
Key Features
| Feature | Design Value |
|---|---|
| No-bypass-capacitor operation | Eliminates BP pin and associated 10nF capacitor-reduces BOM count, PCB area, and assembly cost versus MAX8510 variants. |
| Ultra-low ground current | 40µA typical at light load and 220µA in dropout-extends battery runtime in intermittent-use portable equipment. |
| Stable with 1µF ceramic output cap | Enables use of small, low-ESR X5R/X7R MLCCs across full temperature range-no need for larger or higher-cost alternatives. |
| Integrated protection | Thermal shutdown (+160°C) and current limit (130–300mA) prevent damage during fault conditions without external circuitry. |
| High PSRR at audio frequencies | 72dB rejection at 1kHz suppresses ripple from buck converter switching edges-critical for clean analog supply in audio codecs. |
Applications
| Bluetooth Portable Radios | Digital Cameras |
|---|---|
Use Scenario: Powering RF transceiver ICs and baseband processors in handheld two-way radios. IC Role / Device Role / Timing Role: Provides ultra-clean 2.9V supply to sensitive VCOs and LNA stages, minimizing phase noise and reciprocal mixing. Use Value: 72dB PSRR at 1kHz prevents switching noise from PMU DC-DC converters from degrading receiver sensitivity by >3dB. |
Use Scenario: Supplying image sensor analog front-end and CCD driver circuits in compact point-and-shoot cameras. IC Role / Device Role / Timing Role: Delivers low-noise 2.9V bias to pixel amplifiers and column ADC references to reduce fixed-pattern noise. Use Value: 230µVRMS output noise (100Hz–100kHz) limits RMS noise floor contribution to <0.5 LSB in 12-bit imaging pipelines. |
| Personal Stereos | Portable Medical Sensors |
Use Scenario: Regulating voltage for headphone amplifier and DAC sections in battery-powered audio players. IC Role / Device Role / Timing Role: Supplies low-ripple 2.9V rail to Class AB headphone drivers and sigma-delta modulators. Use Value: 120mV dropout allows operation until single-cell Li-ion drops to 3.02V, preserving >92% of usable battery capacity. |
Use Scenario: Powering precision analog signal chains in wearable ECG or pulse oximetry modules. IC Role / Device Role / Timing Role: Provides stable 2.9V reference for instrumentation amplifiers and 24-bit delta-sigma ADCs. Use Value: ±3% output accuracy over -40°C to +85°C ensures consistent gain calibration across environmental operating conditions. |
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 output, 175mV dropout at 150mA, 25µA IQ, 5-pin WSON (2mm × 2mm) | Higher output current but higher dropout; smaller thermal resistance (θJA = 160°C/W) than SC70 | Select when higher load margin or better thermal performance is needed; requires PCB redesign due to different package and pinout. |
| MCP1702T-2902E/MB | 2.9V fixed, 250mA output, 600mV dropout at 250mA, 4µA IQ, SOT-23-5 | Lower quiescent current but significantly higher dropout; lacks thermal shutdown and current limit | Prefer for ultra-low-power sleep modes where dropout tolerance is acceptable; not suitable for thermally constrained or fault-prone environments. |
Compared with TPS78229DRVR and MCP1702T-2902E/MB, the MAX8511EXK89+ delivers optimal balance of low noise (230µVRMS), moderate dropout (120mV), and integrated protection-making it superior for noise-critical, space-limited, and reliability-demanding portable applications.
Availability
MAX8511EXK89+ is available at Aetrix Electronics and suitable for Bluetooth portable radios, digital cameras, personal stereos, portable medical sensors, and wireless LAN client devices requiring stable component supply across industrial temperature range and long-term production continuity.
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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX8510/MAX8511/MAX8512 family was engineered specifically for ultra-low-noise, low-quiescent-current regulation in space-constrained portable electronics-prioritizing PSRR, dropout, and capacitor simplicity over raw current capability.
FAQ
What is the output voltage tolerance of the MAX8511EXK89+ over temperature and load?
The MAX8511EXK89+ 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 per electrical characteristics table. This ensures reliable operation for 2.85V–3.0V logic interfaces and analog circuits without external trimming.
Does the MAX8511EXK89+ require an external bypass capacitor on the BP pin?
No, the MAX8511EXK89+ does not have a BP (bypass) pin and requires no external bypass capacitor. Unlike the MAX8510, its architecture achieves low noise and high PSRR without BP pin functionality-simplifying design and reducing component count while maintaining 230µVRMS output noise.
What is the maximum allowable input voltage for the MAX8511EXK89+?
The absolute maximum input voltage for the MAX8511EXK89+ is +7V, but the recommended operating range is 2V to 6V. Exceeding 6V risks violating safe operating area limits and may trigger thermal shutdown or degrade long-term reliability-even if within absolute ratings.
Can the MAX8511EXK89+ 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 or poor transient response. The datasheet explicitly states "stable with 1µF ceramic capacitor for any load," and typical operating characteristics confirm stability boundaries in Figure toc20.
How does the shutdown function behave on the MAX8511EXK89+?
When SHDN is pulled low (<0.4V), the MAX8511EXK89+ disables its voltage reference, error amplifier, and pass transistor, dropping output current to <1µA and placing OUT in high-impedance state. Exit delay is 300µs typical; connecting SHDN to IN enables default active operation without external pull-up.
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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