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Analog Devices Inc./Maxim Integrated MAX8531ETTGG-T
- Part No.:
- MAX8531ETTGG-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX8531ETTGG-T.pdf
- Description:
- IC REG LINEAR DUAL LDO
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX8531ETTGG-T from Maxim Integrated is a dual low-dropout linear regulator IC with integrated reference bypass (BP) pin for ultra-low-noise operation, delivering 3.0V/200mA on OUT1 and 3.0V/150mA on OUT2 from 2.5V–6.5V input. It features 100mV typical dropout at 100mA, 40µVRMS output noise (10Hz–100kHz), and thermal/short-circuit protection - designed for noise-sensitive core voltage regulation in portable digital systems.
For engineers reviewing the MAX8531ETTGG-T datasheet, MAX8531ETTGG-T pinout, MAX8531ETTGG-T application, or MAX8531ETTGG-T equivalent, this page delivers verified electrical parameters, QFN-6 exposed-pad package mapping, real-world load-transient behavior, and validated alternative LDOs for battery-powered instrumentation and embedded computing designs.
Technical Context
The MAX8531ETTGG-T integrates two independent P-channel MOSFET pass transistors (RDS(ON) ≈ 1Ω) with internal 1.25V bandgap reference and error amplifiers. Its BP pin enables external 10nF capacitor filtering to suppress reference noise, directly reducing output voltage noise to 40µVRMS across both outputs.
It operates with fixed 3.0V/3.0V outputs (per Output Voltage Selector Guide), uses logic-controlled SHDN for <1µA shutdown current, and provides channel-to-channel isolation >60dB above 10kHz - critical for mixed-signal SoC power domains where OUT1 supplies VCORE and OUT2 powers I/O or analog subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | OUT1 = 3.0V ±3%, OUT2 = 3.0V ±3% - factory-trimmed, no external resistors required |
| Max Output Current | OUT1: 200mA guaranteed; OUT2: 150mA guaranteed - supports dual-rail microprocessor core/I/O rails |
| Dropout Voltage | 100mV (typ) at 100mA - enables operation down to VIN = 3.1V for 3.0V outputs, extending battery life |
| Output Noise | 40µVRMS (10Hz–100kHz) - achieved via BP pin + 10nF ceramic capacitor, suitable for ADC/DAC reference supplies |
| Quiescent Current | 130µA (both LDOs active) - constant across load and dropout, enabling long standby in portable devices |
| Shutdown Current | <1µA - ensures zero-load battery drain during system sleep modes |
| PSRR | 62dB @ 100Hz - suppresses switching noise from upstream DC/DC converters feeding the LDO input |
Pinout & Package
MAX8531ETTGG-T is housed in a 3mm × 3mm × 0.8mm thin QFN-6 package with exposed thermal pad (EP), optimized for high-power-density PCB layouts and efficient heat dissipation via GND-connected copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT2 | Regulator 2 output | Delivers 3.0V/150mA; requires ≥1µF output capacitor for stability |
| 2 - IN | Main input supply | Accepts 2.5V–6.5V; requires 2.2µF low-ESR ceramic input capacitor |
| 3 - OUT1 | Regulator 1 output | Delivers 3.0V/200mA; supports up to 10µF output capacitance for improved transient response |
| 4 - GND | Ground reference & thermal path | Must be soldered to large PCB ground plane to maintain TJ < +150°C under full load |
| 5 - SHDN | Active-high shutdown control | Logic high = normal operation; logic low = both regulators off, IQ < 1µA |
| 6 - BP | Reference bypass terminal | Connects to 10nF ceramic capacitor to reduce reference noise, enabling 40µVRMS output noise |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 40µVRMS (10Hz–100kHz) via dedicated BP pin and 10nF filter - eliminates need for post-LDO LC filtering in precision analog rails |
| P-channel pass transistor | 1Ω RDS(ON) enables load-proportional dropout - achieves 50mV dropout at light loads, improving efficiency over PNP-based LDOs |
| Independent current limiting | OUT1 limit ≥210mA, OUT2 limit ≥165mA - prevents damage during short-circuit events without affecting other rail |
| Thermal shutdown with hysteresis | Activates at TJ = +160°C, resets at +150°C - provides safe pulsed operation during sustained overload, not catastrophic shutdown |
| Stable with ceramic capacitors | Optimized for 2.2µF X7R/X5R ceramics on both inputs and outputs - eliminates need for tantalum or electrolytic capacitors |
Applications
| Digital Camera Core Power | Hand-Held Instrument Analog Rail |
|---|---|
Use Scenario: Powers image sensor digital core and ISP processor requiring clean, stable 3.0V at up to 200mA. IC Role / Device Role / Timing Role: Dual-output LDO providing independent VCORE (OUT1) and I/O (OUT2) rails with simultaneous start-up and tight tracking. Use Value: 40µVRMS noise prevents quantization errors in 12-bit+ image data paths; 100mV dropout extends usable battery range by ~15% vs. legacy LDOs. |
Use Scenario: Supplies precision ADC reference and op-amp bias rails in battery-operated multimeters and data loggers. IC Role / Device Role / Timing Role: Low-noise LDO generating quiet 3.0V for analog front-end, decoupled from noisy digital supply via BP-filtered reference. Use Value: BP pin + 10nF capacitor reduces broadband noise floor by 20dB, enabling sub-LSB measurement accuracy without additional filtering components. |
| Notebook Platform Controller Hub (PCH) I/O | Wireless LAN Card Baseband |
Use Scenario: Delivers regulated 3.0V to PCH I/O buffers and PCIe interface logic in ultraportable notebooks. IC Role / Device Role / Timing Role: High-PSRR (62dB @ 100Hz) LDO rejecting noise from main system DC/DC converter feeding IN pin. Use Value: 62dB PSRR attenuates 1MHz switching ripple by 1000×, preventing bit errors in high-speed serial links without ferrite beads. |
Use Scenario: Powers baseband processor and RF synthesizer circuits in mini-PCIe WLAN cards operating from shared 3.3V system rail. IC Role / Device Role / Timing Role: Dual-rail LDO isolating sensitive RF analog blocks (OUT2) from digital switching noise on OUT1. Use Value: >60dB channel-to-channel isolation above 10kHz prevents digital switching transients from modulating RF carrier phase. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6223D301MR-G | Single-output 3.0V LDO; 200mA; 65mV dropout; no BP pin or noise spec provided | Lacks dual-rail capability and low-noise optimization - requires separate regulators for OUT1/OUT2 | Select when only one 3.0V rail is needed and board space allows discrete solutions |
| Analog Devices ADP7156ARDZ-3.0 | Single-output, ultra-low-noise (1.4µVRMS) LDO; 2A max; 2mm × 2mm LFCSP | Higher cost, larger footprint, and single-rail architecture - no native dual-output or BP functionality | Choose only if sub-2µV noise is mandatory and dual-rail integration is handled externally |
Compared with MAX8531ETTGG-T, XC6223D301MR-G sacrifices dual-rail integration and noise performance for lower unit cost, while ADP7156ARDZ-3.0 delivers superior noise specs but forces system-level duplication to achieve dual 3.0V outputs - making MAX8531ETTGG-T the optimal balance of integration, noise, and footprint for space-constrained dual-rail designs.
Availability
MAX8531ETTGG-T is available at Aetrix Electronics and suitable for digital camera core power, handheld instrument analog rails, notebook PCH I/O, and wireless LAN baseband applications requiring stable component supply, consistent parametric performance, and long-term production availability.
Supply support for MAX8531ETTGG-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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX8530/MAX8531 product line was engineered specifically for ultra-low-noise, dual-rail power delivery in battery-powered portable electronics - emphasizing minimal quiescent current, small UCSP/QFN footprints, and integrated protection features.
FAQ
What output voltages does the MAX8531ETTGG-T provide?
The MAX8531ETTGG-T delivers fixed 3.0V on both OUT1 and OUT2 outputs, as confirmed by the Output Voltage Selector Guide (top mark AEF). These voltages are factory-trimmed to ±3% accuracy across -40°C to +85°C and require no external feedback resistors. The device does not support adjustable outputs - all variants in the ETTGG suffix denote 3.0V/3.0V configuration.
How does the BP pin on MAX8531ETTGG-T reduce output noise?
The BP (bypass) pin on MAX8531ETTGG-T connects internally to the 1.25V bandgap reference. When a 10nF ceramic capacitor is placed between BP and GND, it forms a low-pass filter that attenuates reference noise before it reaches the error amplifier. This design reduces total output voltage noise to 40µVRMS (10Hz–100kHz), as measured with COUT = 2.2µF - a key differentiator from the MAX8530 series, which lacks this pin.
What is the maximum input voltage rating for MAX8531ETTGG-T?
The absolute maximum input voltage for MAX8531ETTGG-T is +7V on the IN pin, per Absolute Maximum Ratings. However, the recommended operating range is 2.5V to 6.5V. Exceeding 6.5V risks violating thermal limits - for example, at VIN = 6.5V and VOUT = 3.0V/200mA, power dissipation exceeds 1951mW (QFN package limit) unless derated. Sustained operation above 6.5V is not supported.
Does MAX8531ETTGG-T include reset functionality like the MAX8530?
No, MAX8531ETTGG-T does not include a RESET output. Unlike the MAX8530, which features an open-drain active-low RESET pin tied to OUT1 monitoring, the MAX8531 replaces that pin with BP (bypass) for noise reduction. Pin 6 on MAX8531ETTGG-T is BP; on MAX8530ETTGG-T it is RESET. This functional distinction is hardwired in silicon and cannot be configured via external components.
What thermal management is required for MAX8531ETTGG-T in QFN package?
MAX8531ETTGG-T in the 3mm × 3mm QFN package requires the GND pin and exposed thermal pad to be soldered to a minimum 100mm² copper area connected to the PCB ground plane. Without this, junction temperature can exceed +150°C at full load (200mA OUT1 + 150mA OUT2 @ VIN = 5V). Thermal shutdown activates at +160°C, but continuous operation must stay below the absolute max rating - proper thermal pad layout ensures safe operation up to +85°C ambient.
MAX8531ETTGG-T 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):
- 3V, 3V
- 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)
MAX8531ETTGG-T FAQ
1.How can I place an order for MAX8531ETTGG-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8531ETTGG-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 MAX8531ETTGG-T reliable?
The price and inventory of MAX8531ETTGG-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8531ETTGG-T is usually 5 days.
3.What payment methods are accepted for MAX8531ETTGG-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8531ETTGG-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8531ETTGG-T?
MAX8531ETTGG-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8531ETTGG-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 MAX8531ETTGG-T?
For technical support, including MAX8531ETTGG-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8531ETTGG-T requirements.
6.How does Aetrix verify that MAX8531ETTGG-T is sourced from the original manufacturer or authorized distributors?
All MAX8531ETTGG-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 MAX8531ETTGG-T meets industry standards.
7.What is the process for return or replacement of MAX8531ETTGG-T?
All MAX8531ETTGG-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8531ETTGG-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 MAX8531ETTGG-T part is unused and in its original packaging.
Return procedure for MAX8531ETTGG-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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