My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8511EXK45+
- Part No.:
- MAX8511EXK45+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX8511EXK45+.pdf
- Description:
- IC REG LINEAR ULTRA LO NOISE
- Quantity:
- Payment:
- Shipping:
Inventory:700
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX8511EXK45+ from Maxim Integrated is a 4.5V fixed-output, ultra-low-noise, low-dropout linear regulator featuring a P-channel MOSFET pass element, 120mV dropout at 120mA, 40µA ground current, and stable operation with only 1µF ceramic output capacitance. It delivers precision regulation for noise-sensitive analog rails in portable RF and audio subsystems.
For engineers reviewing the MAX8511EXK45+ datasheet, MAX8511EXK45+ pinout, MAX8511EXK45+ application, or MAX8511EXK45+ equivalent, key selection criteria include its 4.5V preset output, SC70-5 package footprint, absence of bypass capacitor requirement, 72dB PSRR at 1kHz, and guaranteed 120mA output current under industrial temperature range (-40°C to +85°C).
Technical Context
The MAX8511EXK45+ uses an internal 1.225V bandgap reference and error amplifier to regulate output against load and line variations, with shutdown logic disabling the reference and pass transistor to achieve sub-1µA quiescent current. Its P-channel MOSFET pass device eliminates base-drive current, enabling consistent 40µA ground current across load and input voltage.
No BP (bypass) pin is present - unlike the MAX8510 - confirming its architecture omits external noise-reduction circuitry and relies on inherent low-noise design. The SHDN pin accepts TTL/CMOS-compatible logic levels (0.4V low, 1.5V high) and drives the regulator into high-impedance state when pulled low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.5V ±3% over -40°C to +85°C; enables direct replacement of 4.5V logic or analog supply without feedback resistor network. |
| Dropout Voltage | 120mV at 120mA load; allows operation down to VIN = 4.62V, extending usable battery life in single-cell Li-ion or dual-cell alkaline systems. |
| Ground Current | 40µA typical at no load; remains stable across input voltage and temperature, minimizing standby power loss in always-on subsystems. |
| PSRR | 72dB at 1kHz, 46dB at 100kHz; suppresses switching noise from upstream DC-DC converters feeding sensitive RF or ADC circuitry. |
| Output Capacitance | Stable with ≥1µF ceramic capacitor (X5R/X7R); eliminates need for tantalum or electrolytic capacitors, reducing board area and cost. |
| Shutdown Current | <1µA at VSHDN = 0V; supports deep-sleep modes in battery-powered devices without compromising system-level energy budget. |
| Thermal Protection | Activates at 160°C junction temperature with 10°C hysteresis; prevents permanent damage during sustained overload or poor PCB thermal layout. |
Pinout & Package
MAX8511EXK45+ is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm × 0.95mm), with exposed pad omitted - confirmed by pin configuration table showing no EP connection and N.C. on pin 4. The package is RoHS-compliant and lead-free (+ suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Unregulated Input Supply | Accepts 2V to 6V input; connects directly to upstream DC-DC or battery; requires 1µF ceramic decoupling capacitor. |
| 2 GND | Ground Reference and Thermal Path | Primary return path for load current and internal bias; must be connected to solid ground plane for thermal and noise performance. |
| 3 SHDN | Active-Low Shutdown Control | Pull ≤0.4V to disable regulator; floats or ties to IN for normal operation; draws <0.01µA bias current. |
| 4 N.C. | No Internal Connection | Not bonded or connected internally; must remain unconnected on PCB; no routing or copper fill required. |
| 5 OUT | Regulated 4.5V Output | Delivers up to 120mA; requires 1µF ceramic capacitor to GND; high-impedance when SHDN asserted. |
Key Features
| Feature | Design Value |
|---|---|
| No bypass capacitor required | Eliminates BP pin and external 10nF capacitor, reducing BOM count and PCB area versus MAX8510 - critical for ultra-compact designs. |
| Ultra-low ground current | 40µA typical at zero load ensures minimal impact on battery runtime in standby, especially in intermittently active sensor nodes. |
| Guaranteed 120mA output | Rated continuous current with built-in current limiting (130–300mA trip range) and thermal protection enables robust power delivery without external foldback. |
| SC70-5 footprint compatibility | Standardized 5-pin SC70 package allows drop-in replacement across MAX8510/MAX8511 variants with same voltage code, simplifying inventory management. |
| High PSRR at audio frequencies | 72dB rejection at 1kHz suppresses ripple from buck converter switching harmonics, preserving signal integrity in audio DAC or RF synthesizer supplies. |
Applications
| Bluetooth Audio Transmitter | Portable Medical Sensor Node |
|---|---|
|
Use Scenario: Powering a Bluetooth 5.0 radio IC and associated crystal oscillator in a hearing aid-sized wearable. IC Role / Device Role / Timing Role: Provides clean, low-noise 4.5V supply to RF front-end and clock buffer, isolating sensitive analog sections from digital switching noise. Use Value: 72dB PSRR at 1kHz prevents AM modulation of RF carrier by digital baseband noise; 40µA ground current extends battery life beyond 72 hours per charge. |
Use Scenario: Supplying a low-power ECG analog front-end (AFE) and 16-bit SAR ADC in a disposable patch monitor. IC Role / Device Role / Timing Role: Delivers stable 4.5V rail to precision op-amps and reference buffers, maintaining <0.1% gain accuracy over temperature and battery discharge. Use Value: ±3% output accuracy and 120mV dropout enable full utilization of 4.2V Li-ion cell; 1µF ceramic stability reduces component count and assembly cost. |
| Industrial Handheld Scanner | Smart Home Zigbee Module |
|
Use Scenario: Regulating power to laser diode driver and CMOS image sensor in a ruggedized barcode scanner operating from 3.7V Li-ion. IC Role / Device Role / Timing Role: Supplies regulated 4.5V to high-speed sensor interface and flash memory controller, ensuring timing margin for DDR data capture. Use Value: Guaranteed 120mA output supports peak current bursts during image capture; thermal shutdown protects against enclosure overheating during extended use. |
Use Scenario: Powering Zigbee SoC (e.g., Silicon Labs EFR32MG) and RF matching network in a battery-operated smart plug. IC Role / Device Role / Timing Role: Provides low-noise 4.5V supply to RF transceiver and internal LDOs, minimizing phase noise in 2.4GHz transmit chain. Use Value: No BP capacitor requirement simplifies layout in space-constrained 4-layer PCB; shutdown current <1µA enables multi-year battery life in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8510EXK45+ | Includes BP pin requiring 10nF capacitor for 11µVRMS noise; higher PSRR (78dB @1kHz) but larger BOM and layout overhead. | Better suited for ultra-low-noise analog rails (e.g., PLL VCO supplies) where 11µVRMS is mandatory. | Select MAX8510EXK45+ only if measured output noise must be ≤11µVRMS; otherwise MAX8511EXK45+ offers simpler implementation. |
| Torex XC6210B452MR-G | 4.5V fixed, SOT-25 package, 150mV dropout at 100mA, 50µA quiescent current, 65dB PSRR @1kHz. | Larger dropout and lower PSRR limit use in high-efficiency or noise-critical applications; wider SOT-25 footprint increases board area. | Choose XC6210B452MR-G for cost-sensitive, non-critical rails where SC70 size is not required and 150mV dropout is acceptable. |
Compared with MAX8510EXK45+, the MAX8511EXK45+ trades 6dB PSRR and eliminates BP capacitor dependency for reduced complexity; versus XC6210B452MR-G, it delivers tighter dropout, lower quiescent current, and smaller SC70 footprint - making it optimal for space- and efficiency-constrained portable designs.
Availability
MAX8511EXK45+ is available at Aetrix Electronics and suitable for Bluetooth audio transmitters, portable medical sensor nodes, industrial handheld scanners, and smart home Zigbee modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8511EXK45+ 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 applications.
The MAX8510/MAX8511/MAX8512 family was designed specifically for space-constrained, battery-powered systems demanding ultra-low noise, low dropout, and minimal external components - targeting portable RF, audio, and precision analog subsystems.
FAQ
What is the maximum input voltage rating for MAX8511EXK45+?
The MAX8511EXK45+ has an absolute maximum input voltage of +7V referenced to GND. However, its operational input range is specified from 2V to 6V. Applying voltages above 6V may cause excessive power dissipation or violate safe operating area limits, even if within absolute maximum ratings. Always maintain VIN ≤ 6V during normal operation to ensure reliability and specified performance.
Does MAX8511EXK45+ require an external bypass capacitor like the MAX8510?
No, the MAX8511EXK45+ does not require an external bypass capacitor. Unlike the MAX8510, which features a BP pin for noise reduction via a 10nF capacitor, the MAX8511EXK45+ omits the BP pin entirely (pin 4 is N.C.). Its architecture achieves low-noise operation without external components, simplifying layout and reducing BOM count while delivering 230µVRMS output noise (100Hz–100kHz).
What is the guaranteed minimum output current capability of MAX8511EXK45+?
The MAX8511EXK45+ is guaranteed to deliver 120mA continuous output current across the full industrial temperature range (-40°C to +85°C) and input voltage range (2V to 6V). This rating includes margin for current limiting (130mA min trip) and thermal protection, ensuring reliable operation under worst-case conditions without derating.
Can MAX8511EXK45+ be used with ceramic output capacitors smaller than 1µF?
No - the MAX8511EXK45+ is specified and tested for stability only with ≥1µF ceramic output capacitance (X5R or X7R dielectric). Using smaller values risks oscillation or degraded transient response. The datasheet explicitly states "stable with 1µF ceramic capacitor for any load," and typical operating characteristics assume COUT = 1µF; deviation voids stability guarantees.
How does the shutdown functionality behave on MAX8511EXK45+?
When the SHDN pin of MAX8511EXK45+ is pulled low (≤0.4V), the internal voltage reference, error amplifier, and pass transistor are disabled, placing the OUT pin in high-impedance state and reducing total supply current to <1µA. The device exits shutdown with a typical delay of 300µs after SHDN rises above 1.5V, and the output ramps to 4.5V without overshoot under typical load conditions.
MAX8511EXK45+ 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):
- 4.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.12V @ 120mA (Typ)
- Current - Output:
- 120mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- 90 µA
- 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
MAX8511EXK45+ FAQ
1.How can I place an order for MAX8511EXK45+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8511EXK45+ 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 MAX8511EXK45+ reliable?
The price and inventory of MAX8511EXK45+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8511EXK45+ is usually 5 days.
3.What payment methods are accepted for MAX8511EXK45+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8511EXK45+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8511EXK45+?
MAX8511EXK45+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8511EXK45+ 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 MAX8511EXK45+?
For technical support, including MAX8511EXK45+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8511EXK45+ requirements.
6.How does Aetrix verify that MAX8511EXK45+ is sourced from the original manufacturer or authorized distributors?
All MAX8511EXK45+ 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 MAX8511EXK45+ meets industry standards.
7.What is the process for return or replacement of MAX8511EXK45+?
All MAX8511EXK45+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8511EXK45+, 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 MAX8511EXK45+ part is unused and in its original packaging.
Return procedure for MAX8511EXK45+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8511EXK45+ Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
