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Analog Devices Inc./Maxim Integrated MAX8511EXK28-
- Part No.:
- MAX8511EXK28-
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX8511EXK28-.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX8511EXK28- from Maxim Integrated is a preset 2.8V, 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 MAX8511EXK28- datasheet, MAX8511EXK28- pinout, MAX8511EXK28- application, or MAX8511EXK28- equivalent, this page provides verified package mapping, confirmed pin functions, real-world PSRR/noise performance, thermal protection behavior, and validated alternative options for LDO selection in space-constrained, low-power designs.
Technical Context
The MAX8511EXK28- uses an internal P-channel MOSFET pass transistor (typ. RDS(ON) = 1Ω) to achieve low dropout and eliminate base-drive current loss. Its bandgap reference (1.225V) feeds an error amplifier that controls the pass gate without requiring external feedback components.
No bypass capacitor is needed - unlike the MAX8510 - because the MAX8511EXK28- integrates noise-reduction circuitry directly into its architecture. Shutdown logic disables the reference, error amp, and gate driver, reducing supply current to <1µA while placing OUT in high-impedance state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±3% over -40°C to +85°C - ensures stable core voltage for 2.8V I/O or analog subsystems without resistor network. |
| Max Output Current | 120mA guaranteed - supports moderate-current loads like RF front-ends or ADC/DAC bias rails. |
| Dropout Voltage | 120mV at 120mA load - extends usable battery life down to VIN = 2.92V when powering 2.8V circuits. |
| Ground Current | 40µA typical at light load - minimizes quiescent drain in always-on subsystems such as real-time clocks or sensor wake-up logic. |
| PSRR | 72dB at 1kHz, 46dB at 100kHz - suppresses switching noise from DC/DC converters feeding the input rail. |
| Output Noise | 230µVRMS (100Hz–100kHz) - suitable for low-noise amplifiers, precision references, and RF synthesizer VCO supplies. |
| Shutdown Current | <1µA - enables deep-sleep modes in portable devices without compromising system-level standby power budget. |
Pinout & Package
MAX8511EXK28- is packaged in a 5-pin SC70 (2.0mm × 1.25mm × 0.95mm) with exposed pad option not used in this variant; pin 1 is IN, pin 2 is GND, pin 3 is SHDN, pin 4 is N.C., and pin 5 is OUT. The N.C. pin is unconnected internally and must be left floating or grounded per layout best practice.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Unregulated input supply | Accepts 2V to 6V input; requires 1µF ceramic decoupling close to pin for stability and transient response. |
| 2 - GND | Power and signal ground reference | Serves dual role: electrical return path and primary thermal conduction path; connect to large copper area. |
| 3 - SHDN | Active-low enable control | Pull ≤0.4V to disable regulator; logic-high ≥1.5V enables operation; internal pull-down not provided. |
| 4 - N.C. | No internal connection | Not bonded; must remain unconnected or tied to GND to avoid parasitic coupling in high-frequency layouts. |
| 5 - OUT | Regulated 2.8V output | Delivers up to 120mA; bypass with 1µF ceramic to GND; output impedance remains low across load and frequency range. |
Key Features
| Feature | Design Value |
|---|---|
| No external bypass capacitor required | Eliminates BP pin and associated 10nF capacitor - reduces BOM count and PCB area vs. MAX8510 variants. |
| Stable with 1µF ceramic output capacitor | Enables use of small, low-ESR X5R/X7R MLCCs without phase-margin risk - simplifies layout and lowers cost. |
| Thermal shutdown with 10°C hysteresis | Protects against sustained overload; auto-recovery prevents latch-up during intermittent thermal stress. |
| Overcurrent limiting (130–300mA range) | Prevents damage during short-circuit events; allows indefinite grounding of OUT without device failure. |
| Low 40µA ground current at light load | Maintains high efficiency in partial-load conditions common in sensor nodes and wearables. |
Applications
| Wireless Audio Transceivers | Portable Medical Sensors |
|---|---|
Use Scenario: Powering Bluetooth audio codec and RF transceiver ICs in earbuds and hearing aids. IC Role / Device Role / Timing Role: Primary 2.8V LDO supplying analog front-end and digital core of Bluetooth SoC. Use Value: 230µVRMS noise avoids audible hiss; 72dB PSRR rejects noise from switching charge pumps; 120mV dropout preserves battery runtime. |
Use Scenario: Providing clean bias voltage to low-power ECG/PPG analog signal chains in wearable patches. IC Role / Device Role / Timing Role: Dedicated low-noise supply for instrumentation amplifiers and 16-bit ADC reference buffers. Use Value: Ultra-low ground current extends single-CR2032 battery life beyond 7 days; SC70 footprint fits sub-100mm² form factors. |
| Industrial Handheld Scanners | Smart Home Motion Sensors |
Use Scenario: Regulating power for laser diode drivers and CMOS image sensors in barcode scanners. IC Role / Device Role / Timing Role: Local 2.8V rail isolated from noisy main 3.3V domain to prevent image artifacts. Use Value: 46dB PSRR at 100kHz attenuates high-frequency noise from motor drivers and display backlight ICs. |
Use Scenario: Supplying always-on IR LED and ultra-low-power MCU in battery-operated PIR motion detectors. IC Role / Device Role / Timing Role: Always-active LDO maintaining 2.8V for wake-up logic and sensor bias during deep sleep. Use Value: Sub-1µA shutdown current enables >2-year battery life on two AA cells; SC70 size fits compact housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B282MR-G | 2.8V fixed, 150mA, 120mV dropout, 25µA IQ, but 400µVRMS noise and no thermal shutdown. | Lacks integrated thermal protection and higher noise limits use in precision analog rails. | Select when lowest quiescent current is critical and thermal fault conditions are externally managed. |
| Analog Devices ADP160ACBZ-2.8-R7 | 2.8V fixed, 150mA, 195mV dropout, 550nA shutdown, 45µA IQ, 20µVRMS noise, but requires 2.2µF output cap. | Superior noise performance but larger output capacitance increases board area and cost. | Select when ultra-low noise (<25µVRMS) is mandatory and 2.2µF ceramic is acceptable in layout. |
Compared with MAX8511EXK28-, the XC6219B282MR-G trades thermal safety for lower IQ, while the ADP160ACBZ-2.8-R7 delivers lower noise at the cost of larger output capacitance and higher dropout - making MAX8511EXK28- the balanced choice for compact, thermally robust, medium-noise-sensitive 2.8V rails.
Availability
MAX8511EXK28- is available at Aetrix Electronics and suitable for wireless audio transceivers, portable medical sensors, industrial handheld scanners, smart home motion sensors, and battery-powered IoT edge nodes requiring stable component supply with consistent parametric performance across temperature and volume production.
Supply support for MAX8511EXK28- 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, high PSRR, and minimal external components - targeting portable RF, medical, and sensing equipment.
FAQ
What is the maximum input voltage rating for MAX8511EXK28-?
The MAX8511EXK28- has an absolute maximum input voltage of +7V referenced to GND. However, its operational input range is specified from 2V to 6V. Operating above 6V may cause excessive power dissipation or violate safe operating area limits, especially at elevated temperatures or high load currents. Always maintain VIN ≤ 6V for reliable long-term operation.
Does MAX8511EXK28- require an external bypass capacitor on the BP pin?
No, the MAX8511EXK28- does not include a BP (bypass) pin and does not require an external bypass capacitor. Unlike the MAX8510, the MAX8511EXK28- integrates internal noise-reduction circuitry, eliminating the need for the 10nF BP-to-OUT capacitor. This simplifies design and reduces component count while maintaining 230µVRMS output noise performance.
What is the shutdown behavior of MAX8511EXK28- when SHDN is pulled low?
When SHDN is pulled to ≤0.4V, the MAX8511EXK28- disables its internal voltage reference, error amplifier, and gate driver, turning off the P-channel pass transistor. The output enters a high-impedance state with leakage current <1µA. The device exits shutdown within 300µs (typ.) after SHDN rises above 1.5V, with output settling to 2.8V ±3% under load.
Can MAX8511EXK28- be used with ceramic output capacitors smaller than 1µF?
No - the MAX8511EXK28- is characterized and guaranteed stable only with ≥1µF ceramic output capacitance (X5R or X7R dielectric). Using smaller values risks instability, oscillation, or degraded transient response. The 1µF minimum ensures adequate phase margin across all load conditions and temperature ranges per the manufacturer's stability analysis.
Is MAX8511EXK28- RoHS-compliant and lead-free?
Yes, MAX8511EXK28- carries the "+" suffix per Maxim's ordering nomenclature, indicating it is RoHS-compliant and lead-free. The SC70 package meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), and solder reflow profiles follow IPC/JEDEC J-STD-020D standards with peak temperature up to +260°C.
MAX8511EXK28- 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):
- 2.8V
- 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:
- 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
MAX8511EXK28- FAQ
1.How can I place an order for MAX8511EXK28- through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8511EXK28- 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 MAX8511EXK28- reliable?
The price and inventory of MAX8511EXK28- are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8511EXK28- is usually 5 days.
3.What payment methods are accepted for MAX8511EXK28-?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8511EXK28- transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8511EXK28-?
MAX8511EXK28- orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8511EXK28- 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 MAX8511EXK28-?
For technical support, including MAX8511EXK28- datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8511EXK28- requirements.
6.How does Aetrix verify that MAX8511EXK28- is sourced from the original manufacturer or authorized distributors?
All MAX8511EXK28- 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 MAX8511EXK28- meets industry standards.
7.What is the process for return or replacement of MAX8511EXK28-?
All MAX8511EXK28- units undergo pre-shipment inspection (PSI). If there is an issue with MAX8511EXK28-, 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 MAX8511EXK28- part is unused and in its original packaging.
Return procedure for MAX8511EXK28-:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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