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Analog Devices Inc./Maxim Integrated MAX667MSA/PR+T
- Part No.:
- MAX667MSA/PR+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX667MSA/PR+T.pdf
- Description:
- IC REG LIN POS ADJ 250MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,270
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Product details
Overview
The MAX667MSA/PR+T 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). It is used in battery-powered instrumentation requiring micropower operation and precise end-of-life voltage monitoring.
For engineers reviewing the MAX667MSA/PR+T datasheet, MAX667MSA/PR+T pinout, MAX667MSA/PR+T application, or MAX667MSA/PR+T equivalent, key selection criteria include guaranteed 250mA output under -55°C to +125°C, 20µA typical quiescent current in normal mode, 0.2µA in shutdown, ±2% output accuracy at +5V, and SO-8 package compatibility with industrial/military temperature range.
Technical Context
The MAX667MSA/PR+T uses a PNP pass transistor architecture with a trimmed 1.225V bandgap reference and error amplifier feedback controlled either by internal resistors (for fixed +5V) or external SET-pin divider (for programmable output). Its Dual Mode™ switching is managed by comparator C1 monitoring the SET pin voltage relative to 50mV threshold.
It integrates three independent monitoring functions: LBI/LBO for low-battery detection referenced to 1.225V, SHDN for logic-controlled disable (threshold 1.5V), and DD as open-collector PNP output that sources current when VIN–VOUT falls below ~300mV - providing early warning of regulation loss without requiring external comparators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 250mA max - supports moderate-power microcontrollers and analog sensors without external boost stages. |
| Dropout Voltage | 150mV typ @ 200mA - enables >95% efficiency from 5.15V input to 5V output at full load. |
| Quiescent Current | 20µA typ (normal), 0.2µA typ (shutdown) - extends battery life in always-on portable devices. |
| Input Voltage Range | +3.5V to +16.5V - accommodates single Li-ion, multi-cell alkaline, or regulated DC rails. |
| Output Accuracy | ±2% @ +5V (TA = –55°C to +125°C) - ensures reliable logic-level compliance across full military temp range. |
| SET Reference Voltage | 1.225V ±25mV - enables precise programmable outputs using standard 1% resistors without trimming. |
| Low-Battery Threshold | 1.225V on LBI pin - allows configurable battery cutoff via external resistor divider (e.g., 5.5V cutoff with R3/R4 = 8.2MΩ/2.4MΩ). |
Pinout & Package
MAX667MSA/PR+T is housed in an 8-pin SO (Small Outline) package rated for –55°C to +125°C operation, with gull-wing leads and standard JEDEC MS-012AC footprint (5.0mm × 6.2mm, 1.75mm height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - DD | Dropout Detector Output | Open-collector PNP output sourcing current when VIN–VOUT drops below ~300mV - provides analog warning signal before regulation loss. |
| 2 - OUT | Regulated Output | Main power rail output; requires ≥10µF capacitor (ESR ≥1Ω at –40°C) for stability; shuts down when SHDN > 1.5V. |
| 3 - LBI | Low-Battery Input | CMOS input to internal 1.225V comparator; sets battery cutoff threshold via external resistor divider; <10nA bias current enables MΩ-scale dividers. |
| 4 - GND | Ground Reference | Analog and power ground return; must be low-impedance connection to minimize noise coupling into LBI/SET pins. |
| 5 - SHDN | Shutdown Control | Active-high enable: <1.5V = normal operation; >1.5V = output disabled, quiescent current <1µA; voltage must not exceed VIN + 0.3V. |
| 6 - SET | Output Voltage Select | CMOS input selecting operating mode: ≤50mV = internal 5V divider; >50mV = external resistor feedback for 1.3V–16V output. |
| 7 - LBO | Low-Battery Output | Open-drain N-channel output sinking current when LBI < 1.225V - drives LED or microcontroller interrupt with external pull-up to VOUT. |
| 8 - IN | Unregulated Input | Positive supply input; absolute max +18V; must remain ≥ (VOUT + dropout) for regulation; ESD protected to ±2kV HBM. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Output Configuration | Fixed +5V (zero external components) or adjustable 1.3V–16V via two resistors - eliminates need for separate fixed/adjustable regulators in BOM. |
| Integrated Dropout Warning (DD) | Current-source output activated at ~300mV VIN–VOUT differential - enables predictive battery management without adding discrete comparators or ADC sampling. |
| Micropower Shutdown | 0.2µA typical quiescent current in shutdown - reduces standby drain to negligible levels in long-life battery applications (e.g., remote sensors). |
| Wide Temperature Range | Specified from –55°C to +125°C - qualified for aerospace, downhole, and military systems where commercial-grade regulators fail. |
| Low-Battery Detection with External Threshold | LBI input referenced to 1.225V with <10nA leakage - supports customizable cutoff voltages (e.g., 3.3V, 4.2V, 5.5V) using high-value resistors, minimizing battery loading. |
Applications
| Battery-Powered Portable Instrumentation | Solar-Powered Remote Sensor Node |
|---|---|
|
Use Scenario: Handheld multimeter powered by 4×AA alkaline cells, operating from 6.4V (fresh) down to 4.0V (end-of-life). IC Role / Device Role / Timing Role: Primary 5V supply regulator with integrated LBO-driven LCD backlight disable and DD-triggered data logging halt before brownout. Use Value: Eliminates discrete low-battery comparator and saves PCB area; 150mV dropout extends usable battery life by ~12% vs. standard LDOs. |
Use Scenario: Wireless environmental sensor deployed in off-grid location, powered by 6V solar panel + supercapacitor buffer. IC Role / Device Role / Timing Role: Stable 5V rail for MCU and RF transceiver; LBI monitors supercap voltage; SHDN disables system during nighttime low-light conditions. Use Value: 20µA quiescent current prevents overnight supercap discharge; programmable output allows future firmware updates to support 3.3V logic without hardware change. |
| Pager / Low-Power Radio Receiver | Military-Grade Data Logger |
|
Use Scenario: Legacy pager receiving intermittent FLEX protocol bursts, requiring ultra-low standby current between alerts. IC Role / Device Role / Timing Role: Always-on 5V supply enabling instant wake-up; SHDN held low except during deep sleep; LBO flags weak battery before message loss. Use Value: 0.2µA shutdown current enables >10-year shelf life on primary lithium battery; DD output synchronizes ADC sampling window with stable regulation period. |
Use Scenario: Ruggedized flight recorder logging vibration/temperature in aircraft engine bay, exposed to –55°C cold soak and +125°C operational extremes. IC Role / Device Role / Timing Role: Single-point-of-failure power regulator for critical memory and interface ICs; DD output feeds FPGA health monitor; LBO triggers nonvolatile save before thermal shutdown. Use Value: Military-temperature SO-8 package ensures reliability where commercial parts derate or fail; ±2% output accuracy maintains ADC reference integrity across full range. |
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 |
|---|---|---|---|
| MAX667ESA | Same silicon, SO-8 package but rated –40°C to +85°C; lower max temp, same electrical specs. | Not suitable for aerospace/military deployments requiring –55°C start-up or +125°C sustained operation. | Select MAX667MSA/PR+T when full military temperature range and long-term reliability under thermal cycling are mandatory. |
| LT1129CS8-5 | Fixed +5V LDO (no adjustable mode); 190mV dropout @ 200mA; 50µA quiescent current; SO-8, –40°C to +125°C. | Lacks LBO, DD, and SET functionality - requires external circuitry for battery monitoring or programmability. | Choose MAX667MSA/PR+T when integrated low-battery detection, dropout warning, or output voltage flexibility are required in space-constrained designs. |
Compared with MAX667ESA, the MAX667MSA/PR+T adds guaranteed operation at –55°C and +125°C with identical electrical performance; compared with LT1129CS8-5, it delivers three integrated monitoring functions (LBO, DD, SHDN) and Dual Mode™ programmability - reducing component count and improving system-level predictability in harsh-environment battery systems.
Availability
MAX667MSA/PR+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, solar-powered remote sensors, military data loggers, and pager/radio receiver designs requiring stable component supply across extended temperature ranges.
Supply support for MAX667MSA/PR+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 precision analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing applications.
The MAX667MSA/PR+T belongs to Maxim's micropower LDO regulator family designed specifically for battery-critical systems requiring extended runtime, accurate end-of-life detection, and operation across extreme ambient temperatures.
FAQ
What is the maximum input voltage rating for the MAX667MSA/PR+T?
The MAX667MSA/PR+T has an absolute maximum input voltage of +18V. Operation above this level risks permanent damage. For reliable continuous operation, the input should remain within the specified +3.5V to +16.5V range. This rating applies across the full –55°C to +125°C temperature range and is validated per Maxim's Absolute Maximum Ratings table in the official datasheet revision 4.
Does the MAX667MSA/PR+T support adjustable output voltage, and how is it configured?
Yes, the MAX667MSA/PR+T supports adjustable output from +1.3V to +16V using its SET pin. When SET is biased >50mV above GND, the internal feedback divider disconnects and the output is set by an external resistor network: VOUT = 1.225V × (R1 + R2)/R1. The MAX667MSA/PR+T's 10nA SET input bias enables use of MΩ-range resistors without accuracy loss.
How does the dropout detector (DD) pin function on the MAX667MSA/PR+T?
The DD pin on the MAX667MSA/PR+T is an open-collector PNP output that begins sourcing current when VIN–VOUT falls below approximately 300mV. It provides an analog warning signal before regulation collapse - unlike digital flags, DD enables proportional monitoring of proximity to dropout. A 100kΩ pull-down resistor converts DD current into a measurable voltage for ADC or comparator input.
What is the quiescent current of the MAX667MSA/PR+T in shutdown mode?
The MAX667MSA/PR+T draws 0.2µA typical quiescent current in shutdown mode, verified at TA = +25°C and confirmed across the full –55°C to +125°C range per Electrical Characteristics table. This ultra-low value is achieved by disabling the bandgap reference, error amplifier, and pass transistor bias - making it ideal for multi-year battery deployments where standby drain is critical.
Can the MAX667MSA/PR+T be used with ceramic output capacitors?
No - the MAX667MSA/PR+T requires an output capacitor with sufficient ESR (≥1Ω at –40°C) for stability, as specified in Figure 4 of the datasheet. Ceramic capacitors typically have ESR <10mΩ and will cause oscillation. Recommended solutions include aluminum electrolytic (e.g., 10µF/16V radial), tantalum (e.g., AVX TAJB106K016), or OS-CON types, optionally with a series resistor to meet minimum ESR requirements.
MAX667MSA/PR+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX667MSA/PR+T FAQ
1.How can I place an order for MAX667MSA/PR+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX667MSA/PR+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 MAX667MSA/PR+T reliable?
The price and inventory of MAX667MSA/PR+T 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+T is usually 5 days.
3.What payment methods are accepted for MAX667MSA/PR+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX667MSA/PR+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX667MSA/PR+T?
MAX667MSA/PR+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX667MSA/PR+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 MAX667MSA/PR+T?
For technical support, including MAX667MSA/PR+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX667MSA/PR+T requirements.
6.How does Aetrix verify that MAX667MSA/PR+T is sourced from the original manufacturer or authorized distributors?
All MAX667MSA/PR+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 MAX667MSA/PR+T meets industry standards.
7.What is the process for return or replacement of MAX667MSA/PR+T?
All MAX667MSA/PR+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX667MSA/PR+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 MAX667MSA/PR+T part is unused and in its original packaging.
Return procedure for MAX667MSA/PR+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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