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Analog Devices Inc./Maxim Integrated MAX667MSA/PR
- Part No.:
- MAX667MSA/PR
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX667MSA/PR.pdf
- Description:
- IC REG LIN POS ADJ 250MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,161
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Product details
Overview
The MAX667MSA/PR from Maxim Integrated is a low-dropout, positive linear voltage regulator delivering up to 250mA output current with typical dropout of 150mV at 200mA load. It features Dual Mode™ operation (fixed +5V or adjustable 1.3V–16V output), integrated low-battery detector (LBO/LBI), shutdown control (SHDN), and dropout detector (DD). Designed for battery-powered instrumentation and portable devices operating across -55°C to +125°C.
For engineers reviewing the MAX667MSA/PR datasheet, MAX667MSA/PR pinout, MAX667MSA/PR application, or MAX667MSA/PR equivalent, this page provides verified technical context, validated pin functions, confirmed operating specifications, and real-world design implications for high-reliability embedded power management.
Technical Context
The MAX667MSA/PR employs a micropower PNP pass transistor architecture with a trimmed 1.22V bandgap reference and dual-comparator supervision circuitry. Its error amplifier compares either internal fixed feedback (SET = GND) or external resistive divider (SET > 50mV) to regulate output.
It integrates three independent supervisory functions: LBI/LBO for low-battery detection (threshold ≈1.22V), SHDN for <1µA shutdown mode, and DD as an open-collector PNP output that sources current when VIN–VOUT falls below ~300mV - enabling early dropout warning without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 250mA max - supports moderate-power microcontrollers and analog sensors without external pass devices. |
| Dropout Voltage | 150mV typ at 200mA - enables regulation down to VIN = VOUT + 0.15V, extending usable battery life in 3.7V Li-ion or 4xAA systems. |
| Quiescent Current | 20µA typ (normal), 0.2µA typ (shutdown) - critical for multi-year battery operation in always-on monitoring nodes. |
| Input Voltage Range | +3.5V to +16.5V - accommodates wide input sources including solar panels, multi-cell batteries, and unregulated wall adapters. |
| Operating Temp | -55°C to +125°C - qualified for military, aerospace, and under-hood automotive applications per MAX667MJA grade. |
| Output Accuracy | ±2% over temp - ensures stable 5V supply for ADC references and logic interfaces without trimming. |
| SET Reference | 1.225V ±25mV - enables precise programmable output using standard 1% resistors (e.g., R1=1MΩ, R2=3.1MΩ for 5.0V). |
Pinout & Package
MAX667MSA/PR is supplied in an 8-pin SO package (SOIC-8, 150mil width), rated for -55°C to +125°C operation and compliant with MIL-STD-883 processing upon factory request.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - DD | Dropout Detector Output | Open-collector PNP output sourcing current when VIN–VOUT < ~300mV; used for early-warning flag or auto-shutdown via resistor to SHDN. |
| 2 - OUT | Regulated Output | Main power output; requires ≥10µF capacitor (ESR ≥1Ω @ -40°C) for stability; drops to 0V when SHDN is active. |
| 3 - LBI | Low-Battery Input | CMOS input to 1.22V comparator; threshold set by external resistor divider; leakage <10nA enables high-Z sensing. |
| 4 - GND | Ground Reference | Analog and power ground return; must be low-impedance path to minimize noise on reference and error amp inputs. |
| 5 - SHDN | Shutdown Control | CMOS input; drives device into <1µA quiescent mode when pulled >1.5V; voltage must not exceed VIN + 0.3V. |
| 6 - SET | Output Voltage Select | Switches regulation mode: GND → fixed 5V; >50mV → adjustable mode using external R-divider referenced to 1.225V. |
| 7 - LBO | Low-Battery Output | Open-drain N-channel output sinking current when LBI < 1.22V; requires external pull-up (≥10kΩ to VOUT). |
| 8 - IN | Unregulated Input | Positive input supply; absolute max +18V; must be decoupled locally to suppress ripple and transients. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Output Configuration | Fixed +5V (zero external parts) or adjustable 1.3V–16V via two resistors - eliminates need for separate fixed/adjustable regulators in BOM. |
| Integrated Supervision | Three independent functions (LBO/LBI, SHDN, DD) in one die - reduces board space and external component count vs. discrete supervisor + LDO solutions. |
| Military-Temp Qualified | -55°C to +125°C operation with SO package - enables use in extended-environment avionics, downhole tools, and defense electronics without derating. |
| Ultra-Low Quiescent Current | 20µA typical in active mode - preserves battery capacity in intermittent-sampling IoT sensors where sleep dominates duty cycle. |
| Dropout Warning via DD Pin | DD current rises sharply below ~300mV VIN–VOUT - allows predictive system shutdown before brownout, avoiding data corruption or reset glitches. |
Applications
| Battery-Powered Instrumentation | Solar-Powered Remote Sensors |
|---|---|
|
Use Scenario: Portable multimeter with LCD, microcontroller, and precision ADC running on 4×AA alkaline cells. IC Role / Device Role / Timing Role: Primary 5V power rail regulator with low-dropout operation to maximize runtime as battery voltage declines from 6.4V to 4.0V. Use Value: 150mV dropout extends usable battery life by >20% compared to standard 300mV LDOs; 20µA quiescent current minimizes self-discharge during standby. |
Use Scenario: Wireless soil moisture sensor deployed in agricultural fields, powered by small monocrystalline solar panel and supercapacitor buffer. IC Role / Device Role / Timing Role: Stable 5V supply for RF transceiver and analog front-end, regulating across variable solar input (4.5V–15V) and low-light conditions. Use Value: Wide 3.5V–16.5V input range accepts direct solar input without pre-regulation; DD pin triggers graceful sleep mode before VOUT collapse. |
| Precision Data Loggers | Military-Grade Telemetry Modules |
|
Use Scenario: Industrial temperature logger recording thermocouple data every 10 seconds, housed in sealed enclosure with primary lithium battery. IC Role / Device Role / Timing Role: Low-noise, high-accuracy 5V reference supply for 24-bit sigma-delta ADC and real-time clock. Use Value: ±2% output accuracy and 1.225V internal reference ensure consistent ADC full-scale without calibration; 10µF output cap meets ESR stability requirements. |
Use Scenario: UAV flight controller module requiring operation from -40°C launch to +105°C cruise, powered by 2S LiPo with transient-heavy motor switching. IC Role / Device Role / Timing Role: Ruggedized 5V rail generator with guaranteed -55°C to +125°C performance and integrated LBO for battery health monitoring. Use Value: MIL-qualified SO package and extended temperature rating eliminate thermal derating; LBI/LBO interface directly to FPGA GPIO for autonomous battery state reporting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1129CS8-5#PBF | Fixed 5V output only; 130mV dropout at 200mA; 50µA quiescent current; no LBO/DD/SHDN supervision. | Lacks integrated battery monitoring and dropout warning; requires external enable/shutdown logic. | Choose when only basic 5V regulation is needed and supervision functions are handled elsewhere. |
| TPS76350DBVR | Fixed 5V output; 200mV dropout at 150mA; 17µA quiescent current; includes active-low ENABLE but no LBO or DD. | No low-battery detection or dropout warning; lower max current (150mA vs. 250mA); SOT-23-5 package. | Prefer for space-constrained designs needing minimal footprint and lower cost, where supervision is external. |
Compared with LT1129CS8-5#PBF and TPS76350DBVR, the MAX667MSA/PR uniquely integrates triple supervision (LBO, SHDN, DD) with 250mA capability and military-temperature support - making it optimal for self-contained, high-reliability battery systems where board area and component count must be minimized.
Availability
MAX667MSA/PR is available at Aetrix Electronics and suitable for battery-powered instrumentation, solar-powered remote sensors, precision data loggers, military-grade telemetry modules, and industrial embedded controllers requiring stable component supply across extreme temperatures.
Supply support for MAX667MSA/PR 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 demanding industrial, automotive, and communications applications.
The MAX667MSA/PR belongs to Maxim's micropower LDO regulator family, designed specifically for ultra-low-power, wide-input, and extended-temperature applications where integrated supervision and minimal external components are essential.
FAQ
What is the maximum input voltage rating for the MAX667MSA/PR?
The MAX667MSA/PR has an absolute maximum input voltage of +18V. Operation above +16.5V is not recommended for reliable long-term performance. The device is specified for continuous operation from +3.5V to +16.5V, making it suitable for 12V nominal systems with transient spikes, multi-cell battery packs, and unregulated adapter outputs. Exceeding +18V risks permanent damage per Absolute Maximum Ratings.
How does the Dual Mode™ operation work in the MAX667MSA/PR?
The MAX667MSA/PR enters fixed +5V mode when the SET pin is grounded, using internal trimmed resistors. When SET is biased >50mV above GND, it switches to adjustable mode, where output voltage is set by VOUT = 1.225V × (R1 + R2)/R1. This eliminates the need for separate fixed and adjustable regulators in product families, reducing BOM complexity while maintaining precision via the 1.225V reference.
Can the MAX667MSA/PR be used in -55°C environments?
Yes - the MAX667MSA/PR is explicitly rated for -55°C to +125°C operation and is offered in the M-grade SO package (MAX667MJA qualification level). It undergoes screening per MIL-STD-883 upon factory request, confirming suitability for aerospace, defense, and downhole applications where extended temperature performance is mandatory.
What is the function of the DD pin on the MAX667MSA/PR?
The DD (Dropout Detector) pin on the MAX667MSA/PR is an open-collector PNP output that begins sourcing current when VIN–VOUT falls below ~300mV. Unlike a simple flag, DD provides analog warning - its current increases abruptly near dropout, enabling predictive system response (e.g., triggering SHDN via resistor or feeding a comparator) before regulation loss occurs. This prevents unexpected resets in battery-critical systems.
Does the MAX667MSA/PR require an external capacitor on the OUT pin?
Yes - the MAX667MSA/PR requires a minimum 10µF output capacitor (C1) connected directly between OUT and GND for stability. Aluminum electrolytic, tantalum, or OS-CON types are recommended. ESR must meet minimum values shown in Figure 4 of the datasheet (e.g., ≥1.5Ω at -40°C); insufficient ESR causes oscillation. A series resistor may be added if capacitor ESR is too low.
MAX667MSA/PR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16.5V
- Voltage - Output (Min/Fixed):
- 1.3V (5V)
- Voltage - Output (Max):
- 16V
- Voltage Dropout (Max):
- 0.35V @ 200mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 35 µA
- Current - Supply (Max):
- 20 mA
- PSRR:
- -
- Control Features:
- Dropout Detector, Enable, Low Battery Detection
- Protection Features:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX667MSA/PR FAQ
1.How can I place an order for MAX667MSA/PR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX667MSA/PR 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 MAX667MSA/PR reliable?
The price and inventory of MAX667MSA/PR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX667MSA/PR is usually 5 days.
3.What payment methods are accepted for MAX667MSA/PR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX667MSA/PR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX667MSA/PR?
MAX667MSA/PR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX667MSA/PR 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 MAX667MSA/PR?
For technical support, including MAX667MSA/PR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX667MSA/PR requirements.
6.How does Aetrix verify that MAX667MSA/PR is sourced from the original manufacturer or authorized distributors?
All MAX667MSA/PR 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 MAX667MSA/PR meets industry standards.
7.What is the process for return or replacement of MAX667MSA/PR?
All MAX667MSA/PR units undergo pre-shipment inspection (PSI). If there is an issue with MAX667MSA/PR, 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 MAX667MSA/PR part is unused and in its original packaging.
Return procedure for MAX667MSA/PR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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