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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 MAX8511EXK45+T

Name: MAX8511EXK45+T
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX8511EXK45+T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX8511EXK45+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:: MAX8511EXK45+T.pdf

Description:: IC REG LINEAR 4.5V 120MA SC70-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MAX8511EXK45+T from Maxim Integrated is a preset 4.5V, 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 - deployed in battery-powered portable radios and digital cameras requiring clean, compact power.

For engineers reviewing the MAX8511EXK45+T datasheet, MAX8511EXK45+T pinout, MAX8511EXK45+T application, or MAX8511EXK45+T equivalent, key selection criteria include dropout voltage at 120mA, PSRR at 1kHz/100kHz, shutdown current <1μA, noise performance without bypass capacitor, and SC70 package compatibility with space-constrained PCB layouts.

Technical Context

The MAX8511EXK45+T uses a P-channel MOSFET pass transistor (typ. R_DS(ON) = 1Ω) enabling low ground current across load and input voltage ranges, with no internal feedback divider - unlike the MAX8510 (BP pin for noise reduction) or MAX8512 (FB pin for adjustable output). Its architecture omits the bypass capacitor requirement, simplifying layout while maintaining 230μV_RMS output noise (100Hz–100kHz).

Shutdown logic disables reference, error amplifier, and gate drive, reducing supply current to <1μA; thermal protection activates at +160°C with 10°C hysteresis. It operates from 2V to 6V input and guarantees ±3% output voltage accuracy over –40°C to +85°C with 120mA load.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 4.5V - factory-preset; no external resistor network required.
Max Output Current	120mA continuous - supports moderate-power RF and imaging subsystems without derating.
Dropout Voltage	120mV at 120mA load - enables operation down to 4.62V input for 4.5V rail, extending battery life in single-cell Li-ion systems.
Ground Current	40μA at light load - minimizes quiescent drain during standby in always-on portable devices.
PSRR	72dB at 1kHz, 46dB at 100kHz - suppresses switching noise from DC-DC converters feeding its input.
Output Noise	230μV_RMS (100Hz–100kHz) - suitable for analog signal chains where LDO noise directly impacts SNR.
Shutdown Current	<1μA - ensures negligible battery leakage during system sleep modes.

Pinout & Package

MAX8511EXK45+T is housed in a 5-pin SC70 package (2.0mm × 1.25mm × 0.95mm), RoHS-compliant and tape-and-reel ready. The exposed pad is absent - only available in TDFN variants (e.g., MAX8511ETA45+T).

Pin/Terminal	Circuit Role	Design Meaning
1 - IN	Unregulated Input Supply	Accepts 2V–6V input; requires 1μF ceramic capacitor to GND for stability and line transient suppression.
2 - GND	Ground Reference and Thermal Path	Primary return path for load current and regulator core; connects to PCB ground plane for thermal dissipation.
3 - SHDN	Active-Low Shutdown Control	Pull ≤0.4V to disable regulator; draws <0.01μA bias current; connect to IN for always-on operation.
4 - N.C.	No Connection	Not internally bonded; must be left floating - no routing or stitching required.
5 - OUT	Regulated Output Voltage	Delivers stable 4.5V; bypassed with 1μF ceramic capacitor to GND; high-impedance when disabled.

Key Features

Feature	Design Value
No-bypass-capacitor operation	Eliminates BP pin and external 10nF capacitor - reduces BOM count and PCB area vs. MAX8510.
Ultra-low ground current	40μA typical at light load - extends runtime in intermittent-duty portable equipment.
Stable with 1μF ceramic output cap	Enables use of small, low-ESR X5R/X7R MLCCs without phase-margin risk across –40°C to +85°C.
Integrated protection	Current limit (130–300mA), thermal shutdown (+160°C), and safe short-circuit tolerance - no external fault management needed.
SC70 footprint	5-pin, 2.0mm × 1.25mm outline - compatible with standard pick-and-place and reflow processes for high-density layouts.

Applications

Bluetooth Portable Radio Power	Digital Camera Sensor Bias
Use Scenario: Powers RF transceiver ICs and audio codec in handheld Bluetooth headsets and speakerphones. IC Role / Device Role / Timing Role: Provides clean, low-noise 4.5V VCC for RF front-end and baseband ICs, replacing noisy switchers. Use Value: 230μV_RMS noise prevents reciprocal mixing in receiver chain; 72dB PSRR rejects DC-DC ripple from shared battery rail.	Use Scenario: Supplies image sensor analog core and ADC reference in compact digital still/video cameras. IC Role / Device Role / Timing Role: Delivers stable 4.5V bias under dynamic load steps during exposure and readout cycles. Use Value: 120mV dropout allows operation until battery drops to 4.62V; fast load transient response (<1ms settling) prevents pixel corruption.
Personal Stereo Audio DAC	Portable Medical Pulse Oximeter
Use Scenario: Powers stereo DAC and headphone amplifier in battery-operated MP3 players and wireless earbuds. IC Role / Device Role / Timing Role: Low-noise 4.5V rail minimizes THD+N in audio signal path; shutdown enables playback pause mode. Use Value: 40μA quiescent current preserves battery during music pauses; SC70 size fits tight audio module footprints.	Use Scenario: Supplies analog front-end and LED driver in handheld pulse oximeters requiring clinical-grade signal integrity. IC Role / Device Role / Timing Role: Regulates LED current source and photodiode amplifier bias from single Li-ion cell. Use Value: ±3% output accuracy ensures repeatable LED intensity; thermal shutdown prevents overheating during extended measurement sessions.

Bluetooth Portable Radio Power

Digital Camera Sensor Bias

Use Scenario: Powers RF transceiver ICs and audio codec in handheld Bluetooth headsets and speakerphones.

IC Role / Device Role / Timing Role: Provides clean, low-noise 4.5V VCC for RF front-end and baseband ICs, replacing noisy switchers.

Use Value: 230μV_RMS noise prevents reciprocal mixing in receiver chain; 72dB PSRR rejects DC-DC ripple from shared battery rail.

Use Scenario: Supplies image sensor analog core and ADC reference in compact digital still/video cameras.

IC Role / Device Role / Timing Role: Delivers stable 4.5V bias under dynamic load steps during exposure and readout cycles.

Use Value: 120mV dropout allows operation until battery drops to 4.62V; fast load transient response (<1ms settling) prevents pixel corruption.

Personal Stereo Audio DAC

Portable Medical Pulse Oximeter

Use Scenario: Powers stereo DAC and headphone amplifier in battery-operated MP3 players and wireless earbuds.

IC Role / Device Role / Timing Role: Low-noise 4.5V rail minimizes THD+N in audio signal path; shutdown enables playback pause mode.

Use Value: 40μA quiescent current preserves battery during music pauses; SC70 size fits tight audio module footprints.

Use Scenario: Supplies analog front-end and LED driver in handheld pulse oximeters requiring clinical-grade signal integrity.

IC Role / Device Role / Timing Role: Regulates LED current source and photodiode amplifier bias from single Li-ion cell.

Use Value: ±3% output accuracy ensures repeatable LED intensity; thermal shutdown prevents overheating during extended measurement sessions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS78045DRVR	4.5V fixed, 150mA, 250mV dropout @ 150mA, 1.5μA IQ, 30μV_RMS noise (with 10nF BP cap)	Requires bypass capacitor for low noise; higher dropout limits usable battery range	Select if ultra-low noise (30μV_RMS) is critical and board space allows BP cap; not drop-in due to different pinout and BP dependency.
MCP1703T-4502E/MB	4.5V fixed, 250mA, 600mV dropout @ 250mA, 4μA IQ, 40μV_RMS noise (no BP cap)	Higher dropout and lower PSRR (60dB @ 1kHz); SOT-23-5 package	Choose for lower IQ and higher current, but expect reduced battery efficiency and weaker AC rejection in noisy environments.

Compared with MAX8511EXK45+T, the TPS78045DRVR offers lower noise only with added capacitor complexity and larger dropout, while the MCP1703T-4502E/MB trades off PSRR and dropout for ultra-low IQ - making MAX8511EXK45+T optimal for balanced noise, efficiency, and simplicity in space-constrained 4.5V rails.

Availability

MAX8511EXK45+T is available at Aetrix Electronics and suitable for Bluetooth portable radios, digital cameras, personal stereos, and portable medical devices requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for MAX8511EXK45+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, communications, and consumer applications.

The MAX8510/MAX8511/MAX8512 family was engineered specifically for ultra-low-noise, low-quiescent-current regulation in space-constrained portable electronics - prioritizing noise, PSRR, and minimal external components over programmability or wide input range.

FAQ

What is the output voltage tolerance of MAX8511EXK45+T over temperature and load?

The MAX8511EXK45+T guarantees ±3% output voltage accuracy across –40°C to +85°C ambient temperature and for load currents from 100μA to 80mA. At +25°C with 1mA load, accuracy tightens to ±1%. This ensures reliable 4.5V rail delivery for sensitive analog circuits in portable gear without trimming or calibration.

Does MAX8511EXK45+T require an external bypass capacitor like the MAX8510?

No - MAX8511EXK45+T does not require a bypass capacitor. Unlike the MAX8510 (which uses a BP pin and 10nF capacitor to achieve 11μV_RMS noise), the MAX8511EXK45+T is optimized for simplicity: it delivers 230μV_RMS noise (100Hz–100kHz) with only IN and OUT capacitors, eliminating BP routing and saving PCB area.

What is the maximum input voltage rating for MAX8511EXK45+T?

The absolute maximum input voltage for MAX8511EXK45+T is +7V applied between IN and GND. However, the recommended operating input range is 2V to 6V. Exceeding 6V risks exceeding junction temperature limits or violating safe operating area, especially at high load currents - always verify power dissipation using P = I_OUT(V_IN – 4.5V).

Can MAX8511EXK45+T be used with ceramic output capacitors smaller than 1μF?

No - MAX8511EXK45+T is specified and tested for stability with ≥1μF ceramic output capacitance (X5R/X7R dielectric). Using smaller values (e.g., 0.47μF) may cause oscillation or degraded transient response. The 1μF minimum ensures adequate phase margin across –40°C to +85°C and all load conditions per the datasheet's stability region chart.

How does the shutdown function behave on MAX8511EXK45+T?

When SHDN is pulled low (<0.4V), MAX8511EXK45+T disables its bandgap reference, error amplifier, and pass transistor gate drive, dropping supply current to <1μA and placing OUT in high-impedance state. Release SHDN to IN voltage (≥1.5V) to resume regulation - exit delay is typically 300μs, ensuring glitch-free power-up in sequenced systems.

MAX8511EXK45+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:: Obsolete

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+T FAQ

1.How can I place an order for MAX8511EXK45+T through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX8511EXK45+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 MAX8511EXK45+T reliable?

The price and inventory of MAX8511EXK45+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8511EXK45+T is usually 5 days.

3.What payment methods are accepted for MAX8511EXK45+T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8511EXK45+T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX8511EXK45+T?

MAX8511EXK45+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX8511EXK45+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 MAX8511EXK45+T?

For technical support, including MAX8511EXK45+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8511EXK45+T requirements.

6.How does Aetrix verify that MAX8511EXK45+T is sourced from the original manufacturer or authorized distributors?

All MAX8511EXK45+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 MAX8511EXK45+T meets industry standards.

7.What is the process for return or replacement of MAX8511EXK45+T?

All MAX8511EXK45+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8511EXK45+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 MAX8511EXK45+T part is unused and in its original packaging.

Return procedure for MAX8511EXK45+T:

1.Submit a request within 90 days.

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

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