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Analog Devices Inc./Maxim Integrated MAX8511EXK33+T
- Part No.:
- MAX8511EXK33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX8511EXK33+T.pdf
- Description:
- IC REG LINEAR 3.3V 120MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,083
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Product details
Overview
MAX8511EXK33+T from Maxim Integrated is a 3.3V fixed-output, ultra-low-noise, low-dropout linear regulator delivering up to 120mA with 120mV dropout at full load, 40μA ground current, and stable operation with only 1μF ceramic output capacitance. It targets noise-sensitive analog and RF power rails in portable wireless devices.
For engineers reviewing the MAX8511EXK33+T datasheet, MAX8511EXK33+T pinout, MAX8511EXK33+T application, or MAX8511EXK33+T equivalent, key selection criteria include output noise (230μVRMS), PSRR (72dB @ 1kHz), shutdown current (<1μA), SC70 package footprint, and bypass-capacitor-free design for minimal board area.
Technical Context
The MAX8511EXK33+T uses a P-channel MOSFET pass transistor with 1Ω typical RDS(ON), enabling low dropout and eliminating base-drive current loss. Its error amplifier compares a 1.225V bandgap reference against internal feedback to regulate output voltage without external resistors.
No BP (bypass) pin is present - unlike the MAX8510 - confirming its architecture omits the noise-reduction capacitor path, resulting in higher output noise (230μVRMS) but reduced component count and PCB area. Shutdown logic disables the reference, error amplifier, and gate driver, reducing supply current to <1μA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3% over full load/temperature range - ensures compatibility with 3.3V logic and analog ICs without trimming. |
| Max Output Current | 120mA continuous - sufficient for powering RF transceivers, ADCs, or microcontroller cores in compact portable systems. |
| Dropout Voltage | 120mV at 120mA load (VOUT ≥ 3V) - enables operation down to VIN = 3.42V, extending battery life in single-cell Li-ion or dual-cell alkaline systems. |
| Ground Current | 40μA typical at light load - minimizes quiescent power loss critical for always-on subsystems and battery-backed circuits. |
| 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) - suitable for moderate-noise applications like audio codecs or mid-performance ADCs, but not ultra-low-noise LNA biasing. |
| Shutdown Current | <1μA - enables deep-sleep modes in portable equipment without compromising system standby time. |
Pinout & Package
MAX8511EXK33+T is housed in a 5-pin SC70 package (2.0mm × 1.25mm × 0.95mm height), RoHS-compliant and lead(Pb)-free. The exposed pad is absent - unlike TDFN variants - simplifying layout but limiting thermal dissipation to θJA = 324°C/W.
| 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 for stability and transient response. |
| 2 - GND | Ground reference and thermal path | Primary return for all currents; connects internally to substrate; requires solid copper pour for thermal management. |
| 3 - SHDN | Active-low enable control | Pull ≤0.4V to disable regulator (output high-Z); tie to IN for always-on operation; logic-compatible with 1.5V–6V control sources. |
| 4 - N.C. | No internal connection | Not bonded; must remain unconnected - no routing, stitching, or thermal relief required. |
| 5 - OUT | Regulated 3.3V output | Delivers up to 120mA; requires ≥1μF ceramic capacitor to GND; output impedance remains low across frequency for clean load transients. |
Key Features
| Feature | Design Value |
|---|---|
| No bypass capacitor required | Eliminates BP pin and external 10nF capacitor - reduces BOM count by one passive and saves ~0.5mm² PCB area in SC70 layout. |
| Stable with 1μF ceramic output cap | Enables use of small, low-ESR X5R/X7R MLCCs without phase-margin risk - avoids larger or specialized capacitors. |
| Ultra-low ground current | 40μA typical at light load - extends battery runtime in intermittently active sensor nodes and wearable devices. |
| Integrated protection | Current limit (130–300mA) and thermal shutdown (160°C trip, 10°C hysteresis) prevent damage during fault conditions without external circuitry. |
| High PSRR at audio frequencies | 72dB rejection at 1kHz - effectively attenuates ripple from buck converter switching edges or digital clock coupling into analog supplies. |
Applications
| Bluetooth Audio Transmitter | Digital Camera Image Sensor Bias |
|---|---|
|
Use Scenario: Powers the RF front-end and codec in a Bluetooth headset with tight space constraints and strict EMI limits. IC Role / Device Role: Low-noise 3.3V supply for RF synthesizer VCO tuning voltage and ADC reference buffer. Use Value: 230μVRMS noise and 72dB PSRR prevent audible hiss and intermodulation distortion in audio output while enabling single-layer PCB layout. |
Use Scenario: Supplies bias voltage to CMOS image sensor analog front-end in compact point-and-shoot cameras. IC Role / Device Role: Clean 3.3V rail for column amplifiers and correlated double sampling (CDS) circuitry. Use Value: 120mV dropout allows operation until battery drops to 3.42V, maximizing usable capacity; 1μF stability simplifies decoupling near sensor die. |
| Portable Medical Pulse Oximeter | Industrial Handheld Scanner |
|
Use Scenario: Provides regulated power to photodiode transimpedance amplifier and analog signal chain in battery-operated oximeters. IC Role / Device Role: Low-drift, low-noise 3.3V source for precision op-amps and 16-bit ADC driving LED drivers. Use Value: 40μA ground current extends single-CR2032 battery life beyond 100 hours of intermittent use; SC70 footprint fits within 8mm × 8mm module area. |
Use Scenario: Powers laser diode driver and decode ASIC in rugged barcode scanners requiring reliable operation across -20°C to +70°C. IC Role / Device Role: Main 3.3V supply for FPGA configuration, flash memory interface, and serial communication peripherals. Use Value: Guaranteed 120mA output supports peak current bursts during scan initiation; thermal shutdown prevents latch-up in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B332MR-G | 3.3V fixed, 150mA, 120mV dropout, 25μA IQ, but 450μVRMS noise and no shutdown. | Lacks enable/shutdown control and has higher noise - unsuitable for RF or audio, but acceptable for digital-only rails. | Select when lowest quiescent current is critical and shutdown is unnecessary; verify noise sensitivity of downstream loads. |
| Analog Devices ADP125ARZ-3.3-R7 | 3.3V fixed, 500mA, 135mV dropout, 30μA IQ, 40μVRMS noise, includes BP pin and requires bypass cap. | Higher output current and lower noise, but needs extra 10nF capacitor and occupies larger SOT-23-5 footprint. | Choose when >120mA load or sub-100μVRMS noise is required; accept added component and board area cost. |
Compared with MAX8511EXK33+T, the XC6219B332MR-G trades noise performance and control flexibility for lower IQ, while the ADP125ARZ-3.3-R7 delivers superior noise and current capability at the expense of layout complexity and size - making MAX8511EXK33+T optimal for space-constrained, moderate-noise 120mA applications where simplicity and reliability are prioritized.
Availability
MAX8511EXK33+T is available at Aetrix Electronics and suitable for portable medical devices, Bluetooth accessories, digital imaging modules, and industrial handheld scanners requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX8511EXK33+T 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 - emphasizing minimal external components, ceramic-capacitor compatibility, and robust protection.
FAQ
What is the output voltage tolerance of MAX8511EXK33+T over temperature and load?
The MAX8511EXK33+T guarantees ±3% output voltage accuracy across the full -40°C to +85°C operating temperature range and for output currents from 100μA to 80mA. At 25°C and 1mA load, accuracy tightens to ±1%. This ensures reliable interfacing with 3.3V I/O standards and analog components without external calibration.
Does MAX8511EXK33+T require an external bypass capacitor like the MAX8510?
No, MAX8511EXK33+T does not require an external bypass capacitor. Unlike the MAX8510 (which uses a BP pin and 10nF capacitor to achieve 11μVRMS noise), the MAX8511EXK33+T omits the BP function entirely - simplifying design and reducing component count, though output noise is higher at 230μVRMS.
What is the minimum input voltage needed for MAX8511EXK33+T to maintain regulation at 120mA?
At 120mA load and 3.3V nominal output, MAX8511EXK33+T requires a minimum input voltage of 3.42V (3.3V + 120mV dropout) to maintain regulation. Input voltage must stay within the absolute maximum rating of 7V and functional range of 2V to 6V.
Can MAX8511EXK33+T be used with ceramic capacitors smaller than 1μF?
No - MAX8511EXK33+T is specified and tested for stability only with ≥1μF ceramic output capacitance (X5R/X7R dielectric). Using smaller values risks oscillation or degraded transient response; the 1μF requirement is a hard design constraint, not a recommendation.
Is the SC70 package of MAX8511EXK33+T thermally adequate for 120mA continuous operation at 85°C ambient?
Yes, but with derating. With θJA = 324°C/W and 120mA at 3.3V output (assuming VIN = 4.5V), power dissipation is ~144mW, raising junction temperature by ~46°C above ambient - well below the 150°C max rating. For sustained 120mA at 85°C ambient, ensure adequate PCB copper area on GND pin.
MAX8511EXK33+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.12V @ 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
MAX8511EXK33+T FAQ
1.How can I place an order for MAX8511EXK33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8511EXK33+T 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 MAX8511EXK33+T reliable?
The price and inventory of MAX8511EXK33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8511EXK33+T is usually 5 days.
3.What payment methods are accepted for MAX8511EXK33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8511EXK33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8511EXK33+T?
MAX8511EXK33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8511EXK33+T 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 MAX8511EXK33+T?
For technical support, including MAX8511EXK33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8511EXK33+T requirements.
6.How does Aetrix verify that MAX8511EXK33+T is sourced from the original manufacturer or authorized distributors?
All MAX8511EXK33+T 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 MAX8511EXK33+T meets industry standards.
7.What is the process for return or replacement of MAX8511EXK33+T?
All MAX8511EXK33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8511EXK33+T, 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 MAX8511EXK33+T part is unused and in its original packaging.
Return procedure for MAX8511EXK33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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