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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 MAX8531ETTA8

Name: MAX8531ETTA8
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX8531ETTA8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX8531ETTA8

Manufacturer:: Analog Devices Inc./Maxim Integrated

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

Package:: 6-WDFN Exposed Pad

Datasheet:: MAX8531ETTA8.pdf

Description:: IC REG LINEAR LDO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MAX8531ETTA8 from Maxim Integrated is a dual low-dropout linear regulator IC with integrated low-noise output architecture, designed for space-constrained battery-powered systems. It delivers 200mA from OUT1 and 150mA from OUT2 across 1.5V–3.3V output ranges, features 100mV typical dropout at 100mA, 40µV_RMS output noise (with BP bypass), and operates from 2.5V–6.5V input. It is used in digital cameras and wireless LAN cards where clean, compact dual-rail power is critical.

For engineers reviewing the MAX8531ETTA8 datasheet, MAX8531ETTA8 pinout, MAX8531ETTA8 application, or MAX8531ETTA8 equivalent, key selection criteria include guaranteed dual-output current capability, ultra-low noise performance enabled by the BP pin, thermal and short-circuit protection, and compatibility with ceramic output capacitors down to 1µF for OUT2.

Technical Context

The MAX8531ETTA8 integrates two independent P-channel MOSFET LDOs with internal 1.25V bandgap reference and error amplifiers. Each regulator uses an internal resistor divider for fixed-output voltage setting and features independent current limiting (210mA min for OUT1, 165mA min for OUT2) and thermal shutdown at +160°C with 10°C hysteresis.

Unlike the MAX8530, the MAX8531ETTA8 omits the reset circuit and instead includes a dedicated BP (bypass) pin connected to an internal resistor to form a low-pass filter with an external 10nF capacitor-enabling its specified 40µV_RMS output noise (10Hz–100kHz) and improved channel-to-channel isolation.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5V to 6.5V - supports single-cell Li-ion, Li-polymer, and multi-cell alkaline/NiMH inputs without external pre-regulation.
OUT1 Output Current	Guaranteed 200mA - sufficient to power baseband processors or FPGA I/O banks in portable devices.
OUT2 Output Current	Guaranteed 150mA - suitable for sensor interfaces or low-power RF sections requiring stable bias.
Dropout Voltage	100mV (typ) at 100mA load - enables operation down to ~2.6V input when regulating 2.5V outputs, extending battery runtime.
Output Noise	40µV_RMS (10Hz–100kHz) - achieved via BP pin + 10nF capacitor; critical for ADC references and RF VCO supplies.
Quiescent Current	130µA (both LDOs active) - remains constant across load and dropout, minimizing standby power loss.
Shutdown Current	<1µA - allows deep-sleep modes in handheld instruments without compromising wake-up latency.

Pinout & Package

The MAX8531ETTA8 is housed in a 6-pin thin QFN package (3mm × 3mm × 0.8mm) with exposed thermal pad (pkg code T633-2), rated for -40°C to +85°C operation. The GND pin serves both electrical reference and thermal dissipation functions and must be soldered to a large PCB ground plane.

Pin/Terminal	Circuit Role	Design Meaning
1 - OUT2	Regulator 2 output terminal	Delivers up to 150mA; requires ≥1µF ceramic output capacitor for stability under full load.
2 - IN	Main input supply connection	Accepts 2.5V–6.5V; requires 2.2µF input capacitor (low-ESR ceramic) for line transient suppression.
3 - OUT1	Regulator 1 output terminal	Delivers up to 200mA; requires ≥2.2µF ceramic output capacitor for full-temperature/load stability.
4 - GND	Ground reference and thermal path	Must be connected to large copper area or internal ground plane to maintain junction temperature ≤+150°C.
5 - SHDN	Active-high shutdown control	Logic high (≥1.6V) enables both regulators; logic low (<0.4V) reduces supply current to <1µA.
6 - BP	Reference bypass node	Connects to 10nF ceramic capacitor to reduce reference noise; enables 40µV_RMS output noise specification.

Key Features

Feature	Design Value
Low-noise BP architecture	Enables 40µV_RMS output noise via external 10nF capacitor-critical for precision analog and RF subsystems.
P-channel MOSFET pass devices	Eliminates base-drive current; maintains 130µA quiescent current regardless of load or dropout condition.
Dual independent current limits	210mA (OUT1) and 165mA (OUT2) minimum limits prevent damage during sustained short-circuit events.
Thermal overload protection	Shuts down at +160°C junction temperature and auto-recovers after 10°C cooldown-prevents permanent failure in sealed enclosures.
Ultra-small QFN package	3mm × 3mm footprint with exposed pad fits dense layouts in digital cameras and PCMCIA cards.

Applications

Cellular Baseband Power	Digital Camera Sensor Bias
Use Scenario: Powers baseband processor core (VCORE) and I/O (VI/O) rails in GSM/UMTS handsets with tight board area constraints. IC Role / Device Role / Timing Role: Dual-output LDO providing isolated, low-noise 2.85V/1.8V rails; BP pin suppresses switching noise coupling into sensitive analog sections. Use Value: Enables simultaneous VCORE regulation and VI/O sequencing without external noise filters or discrete regulators-reducing BOM count by two components.	Use Scenario: Supplies image sensor analog front-end and ISP core in compact digital cameras. IC Role / Device Role / Timing Role: Delivers clean 3.0V (OUT1) for sensor bias and 2.85V (OUT2) for ISP logic, with BP filtering suppressing digital switching noise. Use Value: 40µV_RMS noise ensures <1 LSB error in 12-bit ADC conversion paths, preserving dynamic range in low-light imaging.
Wireless LAN Card Core Supply	Hand-Held Instrument Reference Rail
Use Scenario: Provides regulated power to WLAN SoC and RF transceiver in Mini-PCI or M.2 form-factor cards. IC Role / Device Role / Timing Role: Dual LDO generating 2.5V (OUT1) for MAC/PHY and 1.8V (OUT2) for RF section; BP pin decouples noise between domains. Use Value: Achieves >60dB PSRR at 100Hz and >40dB at 1MHz, preventing WLAN packet errors caused by supply ripple.	Use Scenario: Generates precision 3.0V reference rail for 16-bit DACs and low-drift op-amps in portable test equipment. IC Role / Device Role / Timing Role: Low-noise LDO output (OUT1) referenced to BP-filtered bandgap; OUT2 powers auxiliary microcontroller. Use Value: 0.5% output accuracy over -40°C to +85°C and 40µV_RMS noise ensure ±0.5mV absolute voltage accuracy in calibrated measurement paths.

Cellular Baseband Power

Digital Camera Sensor Bias

Use Scenario: Powers baseband processor core (VCORE) and I/O (VI/O) rails in GSM/UMTS handsets with tight board area constraints.

IC Role / Device Role / Timing Role: Dual-output LDO providing isolated, low-noise 2.85V/1.8V rails; BP pin suppresses switching noise coupling into sensitive analog sections.

Use Value: Enables simultaneous VCORE regulation and VI/O sequencing without external noise filters or discrete regulators-reducing BOM count by two components.

Use Scenario: Supplies image sensor analog front-end and ISP core in compact digital cameras.

IC Role / Device Role / Timing Role: Delivers clean 3.0V (OUT1) for sensor bias and 2.85V (OUT2) for ISP logic, with BP filtering suppressing digital switching noise.

Use Value: 40µV_RMS noise ensures <1 LSB error in 12-bit ADC conversion paths, preserving dynamic range in low-light imaging.

Wireless LAN Card Core Supply

Hand-Held Instrument Reference Rail

Use Scenario: Provides regulated power to WLAN SoC and RF transceiver in Mini-PCI or M.2 form-factor cards.

IC Role / Device Role / Timing Role: Dual LDO generating 2.5V (OUT1) for MAC/PHY and 1.8V (OUT2) for RF section; BP pin decouples noise between domains.

Use Value: Achieves >60dB PSRR at 100Hz and >40dB at 1MHz, preventing WLAN packet errors caused by supply ripple.

Use Scenario: Generates precision 3.0V reference rail for 16-bit DACs and low-drift op-amps in portable test equipment.

IC Role / Device Role / Timing Role: Low-noise LDO output (OUT1) referenced to BP-filtered bandgap; OUT2 powers auxiliary microcontroller.

Use Value: 0.5% output accuracy over -40°C to +85°C and 40µV_RMS noise ensure ±0.5mV absolute voltage accuracy in calibrated measurement paths.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX8530ETTA8	Includes open-drain active-low RESET output (100ms min timeout); lacks BP pin and low-noise capability.	Suitable for microprocessor supervision where reset timing is required; not appropriate for noise-sensitive analog rails.	Select MAX8530ETTA8 when system-level reset assertion is needed; avoid for RF or precision ADC applications.
TPL7407LDR	Single 250mA LDO with 150mV dropout; no dual output, no BP pin, no thermal shutdown.	Requires two devices to replicate dual-rail function; higher noise (>100µV_RMS) and no channel isolation.	Only consider if board area allows duplication and noise requirements are relaxed; not a functional substitute.

Compared with MAX8530ETTA8, the MAX8531ETTA8 trades reset functionality for superior noise performance via BP filtering-making it optimal for analog/RF coexistence. Compared with TPL7407LDR, it provides true integrated dual-rail regulation with matched thermal behavior and channel isolation, reducing layout complexity and EMI risk.

Availability

MAX8531ETTA8 is available at Aetrix Electronics and suitable for digital cameras, wireless LAN cards, and hand-held instruments requiring stable component supply, low-noise dual-rail regulation, and compact QFN packaging.

Supply support for MAX8531ETTA8 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 portable applications.

The MAX8531 belongs to Maxim's ultra-low-noise dual-LDO product line, engineered specifically for battery-powered devices where simultaneous clean power delivery to analog and digital subsystems is essential-such as camera modules and wireless transceivers.

FAQ

What output voltage options are available for the MAX8531ETTA8?

The MAX8531ETTA8 is a factory-configured variant with fixed output voltages-specifically 3.0V on OUT1 and 3.0V on OUT2, as indicated by its top-mark "AEF" per the Output Voltage Selector Guide. It does not support adjustable outputs; alternative voltage combinations (e.g., 2.85V/1.8V) require different part numbers such as MAX8531EBTJJ. Custom voltages between 1.5V and 3.3V are available with minimum order quantities.

How is the 40µV_RMS noise specification achieved on the MAX8531ETTA8?

The MAX8531ETTA8 achieves 40µV_RMS output noise (10Hz–100kHz) by routing its internal 1.25V bandgap reference through the BP pin, which connects to an external 10nF ceramic capacitor. This forms a low-pass RC filter that attenuates reference noise before it modulates the error amplifier. The specification is validated with C_BP = 10nF, C_OUT = 2.2µF, and 80mA load-deviations degrade noise performance.

Does the MAX8531ETTA8 include a reset output like the MAX8530?

No, the MAX8531ETTA8 does not include a reset output. It is functionally distinct from the MAX8530 series: the MAX8531 replaces the RESET pin with the BP (bypass) pin to enable low-noise operation. The MAX8531ETTA8 pin 6 is BP-not RESET-and the device lacks undervoltage detection, timeout timing, or open-drain driver circuitry associated with reset functionality.

What thermal design considerations apply to the MAX8531ETTA8 in its QFN package?

The MAX8531ETTA8's 6-pin thin QFN package (T633-2) requires direct soldering of the exposed GND pad to a large PCB copper area or internal ground plane to manage thermal dissipation. Its maximum power dissipation is 1951mW at +70°C, derating by 24.4mW/°C above that. To avoid exceeding the +150°C absolute max junction temperature, keep ambient temperature low, minimize VIN–VOUT differential, and verify power dissipation using P = (VIN − VOUT1)×IOUT1 + (VIN − VOUT2)×IOUT2.

Can the MAX8531ETTA8 operate with ceramic output capacitors smaller than 2.2µF?

Yes-for OUT2, a 1µF ceramic capacitor is sufficient under loads <150mA per the datasheet; however, OUT1 requires ≥2.2µF for stability across the full -40°C to +85°C temperature range and up to 200mA load. Using X7R or X5R dielectrics ensures minimal capacitance shift with temperature; Z5U/Y5V types require ≥4.7µF to guarantee stability below -10°C. The MAX8531ETTA8 is optimized for ceramic capacitors and does not support tantalum.

MAX8531ETTA8 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 6-WDFN Exposed Pad

Packaging:: Bulk

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 2

Voltage - Input (Max):: 6.5V

Voltage - Output (Min/Fixed):: -

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.2V @ 100mA

Current - Output:: 200mA, 150mA

Current - Quiescent (Iq):: 220 µA

Current - Supply (Max):: -

PSRR:: 62dB (100Hz)

Control Features:: Enable, Reset

Protection Features:: Over Current, Over Temperature, Short Circuit

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 6-TDFN-EP (3x3)

MAX8531ETTA8 FAQ

1.How can I place an order for MAX8531ETTA8 through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX8531ETTA8 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 MAX8531ETTA8 reliable?

The price and inventory of MAX8531ETTA8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8531ETTA8 is usually 5 days.

3.What payment methods are accepted for MAX8531ETTA8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8531ETTA8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX8531ETTA8?

MAX8531ETTA8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX8531ETTA8 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 MAX8531ETTA8?

For technical support, including MAX8531ETTA8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8531ETTA8 requirements.

6.How does Aetrix verify that MAX8531ETTA8 is sourced from the original manufacturer or authorized distributors?

All MAX8531ETTA8 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 MAX8531ETTA8 meets industry standards.

7.What is the process for return or replacement of MAX8531ETTA8?

All MAX8531ETTA8 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8531ETTA8, 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 MAX8531ETTA8 part is unused and in its original packaging.

Return procedure for MAX8531ETTA8:

1.Submit a request within 90 days.

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

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