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Analog Devices Inc./Maxim Integrated MAX8511EXK18+T
- Part No.:
- MAX8511EXK18+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX8511EXK18+T.pdf
- Description:
- IC REG LINEAR 1.8V 120MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,214
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Product details
Overview
MAX8511EXK18+T from Maxim Integrated is a 1.8V fixed-output, ultra-low-noise, low-dropout linear regulator delivering up to 120mA with 120mV dropout at full load and 40μA ground current. It uses a P-channel MOSFET pass device, requires only input and output ceramic capacitors (no bypass cap), and targets noise-sensitive analog and RF power rails in portable electronics.
For engineers reviewing the MAX8511EXK18+T datasheet, MAX8511EXK18+T pinout, MAX8511EXK18+T application, or MAX8511EXK18+T equivalent, key selection criteria include its 1.8V preset output, SC70-5 package footprint, 220μA max ground current in dropout, 72dB PSRR at 1kHz, and guaranteed stability with 1μF ceramic output capacitance.
Technical Context
The MAX8511EXK18+T implements a P-channel MOSFET series pass transistor with 1Ω typical RDS(ON), eliminating base-drive current and enabling ultra-low quiescent operation. 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-so output noise is not reduced via external capacitor; instead, it achieves 230μVRMS (100Hz–100kHz) and 72dB PSRR at 1kHz. Shutdown logic disables the reference, error amp, and gate driver, reducing supply current to <1μA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% over 100μA–80mA load and −40°C to +85°C - ensures stable core voltage for 1.8V logic and RF ICs. |
| Max Output Current | 120mA continuous - sufficient for powering single-core microcontrollers, ADCs, or RF front-ends. |
| Dropout Voltage | 135mV at 120mA for VOUT = 1.8V - enables operation down to VIN = 1.935V, extending battery life in single-cell Li-ion systems. |
| Ground Current | 40μA typical at light load; 220μA max in dropout - minimizes standby power loss in always-on subsystems. |
| PSRR | 72dB at 1kHz, 46dB at 100kHz - suppresses switching noise from DC-DC converters feeding the LDO input. |
| Output Noise | 230μVRMS (100Hz–100kHz) - suitable for powering PLLs, VCOs, and precision analog sensors where noise coupling must be minimized. |
| Input Voltage Range | 2V to 6V - compatible with single-cell Li-ion (2.7–4.2V), LiFePO4, and regulated 3.3V/5V supplies. |
Pinout & Package
MAX8511EXK18+T is housed in a RoHS-compliant 5-pin SC70 package (2.0mm × 1.25mm × 0.95mm height) with exposed pad omitted - optimized for minimal PCB area in space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Unregulated Input Supply | Accepts 2V–6V input; must be decoupled with ≥1μF ceramic capacitor close to pin. |
| 2 (GND) | Ground Reference and Thermal Path | Primary return path for load current and regulator control circuitry; connects to PCB ground plane for thermal dissipation. |
| 3 (SHDN) | Active-Low Shutdown Control | Pull ≤0.4V to disable regulator; draws <1μA in shutdown; connect to IN for always-on operation. |
| 4 (N.C.) | No Internal Connection | Not bonded; must remain unconnected - no routing or copper fill required. |
| 5 (OUT) | Regulated 1.8V Output | Delivers up to 120mA; requires ≥1μF ceramic capacitor to GND for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| No Bypass Capacitor Required | Eliminates BP pin and external 10nF capacitor - reduces BOM count and saves 0.5mm² board area vs. MAX8510 variants. |
| Stable with 1μF Ceramic Output Cap | Enables use of low-cost, small-footprint X5R/X7R MLCCs across full temperature range - no ESR tuning needed. |
| Ultra-Low Ground Current | 40μA typical at light load - extends battery runtime in sleep-mode applications such as Bluetooth LE peripherals. |
| Overcurrent & Thermal Protection | Current limit activates at 130–300mA; thermal shutdown engages at 160°C with 10°C hysteresis - prevents damage during fault conditions. |
| High PSRR at Low Frequencies | 72dB rejection at 1kHz - effectively filters ripple from upstream buck converters operating at ~500kHz–2MHz with LC filtering. |
Applications
| Bluetooth Audio Transmitter | Digital Camera Image Sensor Bias |
|---|---|
|
Use Scenario: Powers the RF transceiver and audio codec in compact wireless earbuds with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Provides clean, low-noise 1.8V supply to RF synthesizer and DAC sections to minimize phase noise and THD. Use Value: 230μVRMS noise and 72dB PSRR prevent AM-to-PM conversion in VCOs and reduce audible hiss in audio paths. |
Use Scenario: Supplies bias voltage to CMOS image sensor's analog pixel array and column ADC in ultra-thin point-and-shoot cameras. IC Role / Device Role / Timing Role: Delivers stable 1.8V rail isolated from noisy digital core supply, ensuring consistent pixel response and low fixed-pattern noise. Use Value: 120mV dropout allows operation until battery drops to 1.935V, maximizing usable capacity; 1μF stability simplifies layout near sensor module. |
| Portable Medical Pulse Oximeter | Industrial Handheld Scanner |
|
Use Scenario: Powers photodiode transimpedance amplifier and analog front-end in battery-operated clinical-grade oximeters. IC Role / Device Role / Timing Role: Low-noise 1.8V source for precision op-amps and sigma-delta ADC reference buffers. Use Value: 40μA ground current extends 2-week battery life between charges; thermal protection guards against enclosure overheating during extended use. |
Use Scenario: Supplies 1.8V logic and laser driver bias in ruggedized barcode scanners powered by replaceable AA/AAA packs. IC Role / Device Role / Timing Role: Regulates voltage for FPGA I/O banks and laser diode modulation circuitry requiring tight tolerance and fast transient recovery. Use Value: 120mA capability supports pulsed laser bursts; 1ms load transient response (per typical curves) maintains voltage within ±1.5% during scan triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B182MR-G | 1.8V fixed, 150mA, 250mV dropout @ 100mA, 100μA IQ, SC70-5 | Higher dropout and ground current; lower PSRR (60dB @ 1kHz) | Acceptable where cost is critical and noise/PSRR margins allow 10–15mV higher minimum input. |
| Analog Devices ADP160AUJZ-1.8-R7 | 1.8V fixed, 150mA, 195mV dropout @ 150mA, 57μA IQ, TSOT-5 | TSOT-5 footprint (not SC70-compatible); 115μVRMS noise but lower PSRR (65dB @ 1kHz) | Preferred when lower noise is prioritized over footprint compatibility; requires PCB redesign. |
Compared with the MAX8511EXK18+T, the XC6219B182MR-G trades higher dropout and noise for lower unit cost, while the ADP160AUJZ-1.8-R7 offers superior noise performance in a non-pin-compatible package - making MAX8511EXK18+T optimal for space-constrained, noise-sensitive SC70 designs needing best-in-class PSRR/noise balance.
Availability
MAX8511EXK18+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 full traceability and long-term lifecycle support.
Supply support for MAX8511EXK18+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) 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 ultra-low-noise, low-quiescent-power regulation in battery-powered portable electronics - emphasizing minimal board area, ceramic-capacitor compatibility, and robust protection features.
FAQ
What is the maximum input voltage rating for the MAX8511EXK18+T?
The MAX8511EXK18+T has an absolute maximum input voltage of +7V, but its operational input range is specified from 2V to 6V. Operating above 6V risks exceeding junction temperature limits under load and violates recommended conditions in the datasheet. For reliable 1.8V output regulation, maintain VIN between 1.935V (dropout margin) and 6V.
Does the MAX8511EXK18+T require an external bypass capacitor on the BP pin?
No - the MAX8511EXK18+T does not include a BP (bypass) pin and therefore requires no external bypass capacitor. Unlike the MAX8510, which uses a BP pin and 10nF capacitor to achieve 11μVRMS noise, the MAX8511EXK18+T is optimized for simplicity: only input and output 1μF ceramic capacitors are needed for full stability and performance.
What is the shutdown current consumption of the MAX8511EXK18+T?
The MAX8511EXK18+T draws less than 1μA total supply current when SHDN is pulled low. This ultra-low shutdown current is maintained across the full operating temperature range (−40°C to +85°C), making it ideal for battery-backed systems where multi-month shelf life and zero-power standby modes are required.
Can the MAX8511EXK18+T be used with X5R or Y5V ceramic capacitors?
Yes - the MAX8511EXK18+T is stable with 1μF X5R or X7R ceramic capacitors across −40°C to +85°C. However, Y5V and Z5U dielectrics exhibit large capacitance and ESR shifts at temperature extremes; for guaranteed stability below −10°C, a 2.2μF or larger Y5V capacitor is recommended per the datasheet's stability guidelines.
Is the MAX8511EXK18+T pin-compatible with other MAX851x variants in SC70-5?
Yes - all MAX8510/MAX8511/MAX8512 SC70-5 versions (e.g., MAX8510EXK18+T, MAX8511EXK18+T, MAX8512EXK+T) share identical pinouts: IN, GND, SHDN, N.C., OUT. However, functional differences exist: MAX8510 has BP pin (replacing N.C.), MAX8512 has FB (replacing N.C.), so direct substitution requires verifying external circuit compatibility.
MAX8511EXK18+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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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
MAX8511EXK18+T FAQ
1.How can I place an order for MAX8511EXK18+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8511EXK18+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 MAX8511EXK18+T reliable?
The price and inventory of MAX8511EXK18+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8511EXK18+T is usually 5 days.
3.What payment methods are accepted for MAX8511EXK18+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8511EXK18+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8511EXK18+T?
MAX8511EXK18+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8511EXK18+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 MAX8511EXK18+T?
For technical support, including MAX8511EXK18+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8511EXK18+T requirements.
6.How does Aetrix verify that MAX8511EXK18+T is sourced from the original manufacturer or authorized distributors?
All MAX8511EXK18+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 MAX8511EXK18+T meets industry standards.
7.What is the process for return or replacement of MAX8511EXK18+T?
All MAX8511EXK18+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8511EXK18+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 MAX8511EXK18+T part is unused and in its original packaging.
Return procedure for MAX8511EXK18+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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