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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Analog Devices Inc./Maxim Integrated MAX8511EXK35+T

Name: MAX8511EXK35+T
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX8511EXK35+T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX8511EXK35+T

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: MAX8511EXK35+T.pdf

Description:: IC REG LINEAR 3.5V 120MA SC70-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MAX8511EXK35+T from Maxim Integrated is a 3.5V fixed-output, 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 output capacitance. It targets noise-sensitive RF and analog circuitry in portable battery-powered systems.

For engineers reviewing the MAX8511EXK35+T datasheet, MAX8511EXK35+T pinout, MAX8511EXK35+T application, or MAX8511EXK35+T equivalent, key selection criteria include its 3.5V preset output, SC70-5 package footprint, absence of bypass capacitor requirement, 72dB PSRR at 1kHz, and guaranteed 120mA output capability under -40°C to +85°C operation.

Technical Context

The MAX8511EXK35+T uses a P-channel MOSFET pass transistor (typ. R_DS(ON) = 1Ω) enabling low dropout and minimal ground current across load and temperature. Its architecture omits the BP pin-unlike the MAX8510-eliminating need for external bypass capacitance while maintaining 230μV_RMS output noise (100Hz–100kHz).

Shutdown logic reduces supply current below 1μA; thermal shutdown activates at +160°C with 10°C hysteresis. The device operates from 2V to 6V input and delivers ±2% output voltage accuracy over 100μA–80mA load and full temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.5V (factory-preset; confirmed by part number suffix '35')
Max Output Current	120mA continuous - sufficient for RF transceivers, ADCs, and low-power microcontrollers
Dropout Voltage	120mV at 120mA load - enables operation down to VIN = 3.62V while sustaining 3.5V output
Ground Current	40μA typical at light load - extends battery life in always-on sensor nodes
PSRR	72dB at 1kHz - suppresses switching noise from DC/DC converters feeding the input rail
Output Noise	230μV_RMS (100Hz–100kHz) - suitable for powering VCOs, PLLs, and precision analog front-ends
Input Voltage Range	2V to 6V - compatible with single Li-ion, dual alkaline, or regulated 3.3V/5V system rails

Pinout & Package

MAX8511EXK35+T is housed in a RoHS-compliant 5-pin SC70 package (2.0mm × 1.25mm × 0.95mm), with exposed pad not present (TDFN variant uses EP; SC70 does not). Pin 1 is IN, Pin 2 is GND, Pin 3 is SHDN, Pin 4 is NC (no internal connection), and Pin 5 is OUT.

Pin/Terminal	Circuit Role	Design Meaning
1 - IN	Unregulated input supply	Accepts 2V–6V; requires 1μF ceramic input capacitor for stability and transient immunity
2 - GND	Ground reference and thermal path	Must connect to solid ground plane; carries return current and dissipates heat
3 - SHDN	Active-low enable control	Pull ≤0.4V to disable; draws <1μA in shutdown; connect to IN for always-on operation
4 - NC	No connection	Not internally bonded; must remain unconnected on PCB
5 - OUT	Regulated 3.5V output	Delivers up to 120mA; bypassed with 1μF ceramic capacitor to GND for stability

Key Features

Feature	Design Value
No BP pin required	Eliminates 10nF bypass capacitor - reduces BOM count and board area vs. MAX8510
Stable with 1μF ceramic C_OUT	Enables use of small, low-ESR X5R/X7R capacitors without phase-margin risk
Thermal + overcurrent protection	Self-protects during short-circuit or high ambient; cycles output if junction exceeds +160°C
Low 40μA quiescent current	Maintains efficiency in standby mode - critical for coin-cell or energy-harvesting applications
±2% output accuracy (full load/temp)	Meets tight tolerance requirements for ADC references and RF bias rails

Applications

Cellular Front-End Power	Portable Audio Codec Supply
Use Scenario: Powers RF transceiver LNA and mixer stages in GSM/UMTS handsets where supply noise directly impacts EVM and adjacent channel leakage. IC Role / Device Role / Timing Role: Low-noise post-regulator supplying clean 3.5V bias to analog RF blocks downstream of a noisy buck converter. Use Value: 230μV_RMS noise and 72dB PSRR at 1kHz prevent AM-to-PM conversion and preserve receiver sensitivity.	Use Scenario: Supplies headphone amplifier and stereo DAC in Bluetooth earbuds requiring quiet, stable voltage under dynamic audio load. IC Role / Device Role / Timing Role: Primary analog supply rail decoupling digital switching noise from sensitive audio signal paths. Use Value: 120mA capability supports peak headphone drive; 40μA ground current extends playback time between charges.
Digital Camera Image Sensor Bias	Industrial IoT Sensor Node Core Rail
Use Scenario: Provides regulated 3.5V to CMOS image sensor analog core and column ADC, where supply ripple causes fixed-pattern noise. IC Role / Device Role / Timing Role: Precision low-noise LDO placed close to sensor die to minimize trace inductance and noise coupling. Use Value: Stable 1μF ceramic output support simplifies layout; ±2% accuracy ensures consistent pixel response across temperature.	Use Scenario: Powers ultra-low-power MCU, BLE radio, and precision temperature/humidity sensor in battery-operated environmental monitor. IC Role / Device Role / Timing Role: Always-on system rail enabling rapid wake-from-sleep with sub-1μA shutdown current. Use Value: SC70-5 footprint saves space on compact PCBs; thermal protection prevents failure during enclosure overheating events.

Cellular Front-End Power

Portable Audio Codec Supply

Use Scenario: Powers RF transceiver LNA and mixer stages in GSM/UMTS handsets where supply noise directly impacts EVM and adjacent channel leakage.

IC Role / Device Role / Timing Role: Low-noise post-regulator supplying clean 3.5V bias to analog RF blocks downstream of a noisy buck converter.

Use Value: 230μV_RMS noise and 72dB PSRR at 1kHz prevent AM-to-PM conversion and preserve receiver sensitivity.

Use Scenario: Supplies headphone amplifier and stereo DAC in Bluetooth earbuds requiring quiet, stable voltage under dynamic audio load.

IC Role / Device Role / Timing Role: Primary analog supply rail decoupling digital switching noise from sensitive audio signal paths.

Use Value: 120mA capability supports peak headphone drive; 40μA ground current extends playback time between charges.

Digital Camera Image Sensor Bias

Industrial IoT Sensor Node Core Rail

Use Scenario: Provides regulated 3.5V to CMOS image sensor analog core and column ADC, where supply ripple causes fixed-pattern noise.

IC Role / Device Role / Timing Role: Precision low-noise LDO placed close to sensor die to minimize trace inductance and noise coupling.

Use Value: Stable 1μF ceramic output support simplifies layout; ±2% accuracy ensures consistent pixel response across temperature.

Use Scenario: Powers ultra-low-power MCU, BLE radio, and precision temperature/humidity sensor in battery-operated environmental monitor.

IC Role / Device Role / Timing Role: Always-on system rail enabling rapid wake-from-sleep with sub-1μA shutdown current.

Use Value: SC70-5 footprint saves space on compact PCBs; thermal protection prevents failure during enclosure overheating events.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS78235DRVR	3.5V fixed, 150mA, 250mV dropout at 150mA, 17μV_RMS noise, requires 2.2μF min C_OUT	Better noise performance but larger output cap requirement and higher dropout limits low-VIN use cases	Select when lower noise is prioritized and board space allows larger capacitor; verify thermal derating at 150mA
MCP1703T-3502E/MB	3.5V fixed, 250mA, 600mV dropout at 250mA, 40μV_RMS noise, 2.2μF C_OUT recommended	Higher current and lower noise, but significantly higher dropout and larger package (SOT-23-5)	Choose for higher load margin or tighter noise specs; avoid where input headroom is constrained below 4.1V

Compared with TPS78235DRVR and MCP1703T-3502E/MB, the MAX8511EXK35+T offers the smallest footprint (SC70-5), lowest dropout (120mV), and lowest quiescent current (40μA), making it optimal for space- and battery-limited designs where 230μV_RMS noise is acceptable.

Availability

MAX8511EXK35+T is available at Aetrix Electronics and suitable for cellular front-end power, portable audio codec supply, digital camera image sensor bias, and industrial IoT sensor node core rail applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX8511EXK35+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 high-performance analog, mixed-signal, and power-management ICs for demanding applications in communications, computing, and industrial systems.

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, SC70/TDFN packaging, and robust thermal behavior.

FAQ

What is the output voltage tolerance of the MAX8511EXK35+T over temperature and load?

The MAX8511EXK35+T guarantees ±3% output voltage accuracy over full load (100μA to 80mA) and operating temperature (-40°C to +85°C). At +25°C and 1mA load, accuracy tightens to ±1%. This is confirmed in the Electrical Characteristics table under "Output Voltage Accuracy" with conditions explicitly referencing the MAX8511 variant.

Does the MAX8511EXK35+T require an external bypass capacitor like the MAX8510?

No, the MAX8511EXK35+T does not require an external bypass capacitor. Unlike the MAX8510 (which uses a BP pin and 10nF capacitor), the MAX8511 omits the BP pin entirely - as shown in the Pin Description table and confirmed in the General Description stating "The MAX8511 does not require a bypass capacitor." This simplifies design and reduces component count.

What is the maximum allowable input voltage for the MAX8511EXK35+T?

The absolute maximum input voltage for the MAX8511EXK35+T is +7V (IN to GND), per the Absolute Maximum Ratings table. However, the recommended operating input range is 2V to 6V, as specified in the Electrical Characteristics. Operation above 6V risks exceeding safe power dissipation limits, especially at high ambient temperatures or full load.

Can the MAX8511EXK35+T be used with ceramic output capacitors smaller than 1μF?

No - the MAX8511EXK35+T is specified and tested for stability with a minimum 1μF ceramic output capacitor (X5R or X7R dielectric). Using smaller values may cause oscillation or degraded transient response, as confirmed in the Capacitor Selection section and Typical Operating Characteristics plots showing stability boundaries versus C_OUT ESR and value.

How does the shutdown function behave on the MAX8511EXK35+T?

When the SHDN pin is pulled low (<0.4V), the MAX8511EXK35+T disables its voltage reference, error amplifier, and pass transistor, reducing total supply current to <1μA. The output enters a high-impedance state - not actively discharged - and resumes regulation within 300μs after SHDN returns high (>1.5V), as documented in the Electrical Characteristics table under "Shutdown Exit Delay."

MAX8511EXK35+T 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:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 6V

Voltage - Output (Min/Fixed):: 3.5V

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:: 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

MAX8511EXK35+T FAQ

1.How can I place an order for MAX8511EXK35+T through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX8511EXK35+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 MAX8511EXK35+T reliable?

The price and inventory of MAX8511EXK35+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8511EXK35+T is usually 5 days.

3.What payment methods are accepted for MAX8511EXK35+T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8511EXK35+T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX8511EXK35+T?

MAX8511EXK35+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX8511EXK35+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 MAX8511EXK35+T?

For technical support, including MAX8511EXK35+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8511EXK35+T requirements.

6.How does Aetrix verify that MAX8511EXK35+T is sourced from the original manufacturer or authorized distributors?

All MAX8511EXK35+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 MAX8511EXK35+T meets industry standards.

7.What is the process for return or replacement of MAX8511EXK35+T?

All MAX8511EXK35+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8511EXK35+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 MAX8511EXK35+T part is unused and in its original packaging.

Return procedure for MAX8511EXK35+T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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