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Analog Devices Inc./Maxim Integrated MAX667ESA+T
- Part No.:
- MAX667ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX667ESA+T.pdf
- Description:
- IC REG LIN POS ADJ 250MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,624
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Product details
Overview
MAX667ESA+T from Maxim Integrated is a low-dropout linear voltage regulator delivering up to 250mA output current with typical dropout of 150mV at 200mA, 20µA quiescent current in normal mode, and dual-mode operation (fixed +5V or adjustable 1.3V–16V output). It integrates low-battery detection (LBI/LBO), dropout warning (DD), and shutdown control (SHDN), making it suitable for battery-powered instrumentation and portable radios.
For engineers reviewing the MAX667ESA+T datasheet, MAX667ESA+T pinout, MAX667ESA+T application, or MAX667ESA+T equivalent, key selection criteria include dropout voltage vs. load, quiescent current in shutdown (<1µA), LBO open-drain behavior, SET-input programmability, and SO-8 thermal derating (471mW at +70°C).
Technical Context
The MAX667ESA+T uses a PNP pass transistor architecture with micropower bandgap reference trimmed to 1.22V and dual comparators: one for mode selection (fixed vs. adjustable) and another for low-battery detection. Its error amplifier compares feedback from either internal resistors (for +5V) or external SET-divider (for programmable output).
Dropout detection is implemented via DD - an open-collector PNP output that sources increasing current as VIN–VOUT falls below ~300mV - enabling early regulation loss warning. Shutdown disables OUT, LBO, and DD while reducing IQ to <1µA when SHDN >1.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 250mA max - supports moderate-power analog/digital loads without external pass devices. |
| Dropout Voltage | 150mV typ at 200mA - enables operation down to VIN = VOUT + 0.15V, extending usable battery life. |
| Quiescent Current | 20µA typ (normal), 0.2µA typ (shutdown) - critical for multi-year battery life in always-on sensors. |
| Input Voltage Range | +3.5V to +16.5V - accommodates single Li-ion, multi-cell alkaline, or regulated intermediate rails. |
| SET Reference Voltage | 1.225V ±25mV - enables precise programmable output using fixed-resistor dividers, no trim pot required. |
| Low-Battery Threshold | 1.22V on LBI - configurable via external divider; LBO sinks current when threshold violated. |
| Shutdown Threshold | 1.5V min on SHDN - CMOS-compatible logic-level enable/disable with <1µA standby IQ. |
Pinout & Package
MAX667ESA+T is housed in an 8-pin SO (Small Outline) package rated for –40°C to +85°C operation, with 5.88mW/°C thermal derating above +70°C (471mW max at +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - DD | Dropout Detector Output | Open-collector PNP output sourcing current as VIN–VOUT approaches dropout; used for early-warning signaling. |
| 2 - OUT | Regulated Output | Delivers stable +5V (SET = GND) or programmable voltage; requires ≥10µF output capacitor for stability. |
| 3 - LBI | Low-Battery Input | CMOS input to 1.22V comparator; threshold set by external resistor divider for customizable battery monitoring. |
| 4 - GND | Ground Reference | Primary return path for regulator, comparators, and bias circuitry; must be low-impedance. |
| 5 - SHDN | Shutdown Control | Active-high enable: <1.5V = normal operation; >1.5V = output disabled and IQ reduced to <1µA. |
| 6 - SET | Output Voltage Set | CMOS input selecting operating mode: GND = fixed +5V; >50mV = adjustable output via external R-divider. |
| 7 - LBO | Low-Battery Output | Open-drain N-channel output sinking current when LBI < 1.22V; requires external pull-up to VOUT or logic rail ≤ VOUT. |
| 8 - IN | Unregulated Input | Accepts +3.5V to +16.5V; maximum absolute rating is +18V; power dissipation limited by package and ambient temperature. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Operation | Single IC supports both minimal-component +5V regulation (SET = GND) and precision programmable output (1.3V–16V) via external resistors - eliminates BOM duplication. |
| Low-Dropout Performance | 150mV typical dropout at 200mA enables use with depleting batteries (e.g., 4.5V input sustaining 5V output until ~4.65V). |
| Integrated Power Monitoring | Three independent monitoring functions - LBO (low-battery alert), DD (dropout warning), and SHDN (power-gating) - reduce need for external supervisors. |
| Micropower Efficiency | 20µA typical quiescent current in active mode and <1µA in shutdown - preserves battery capacity during idle/sleep states. |
| Robust Output Stability | Stable with standard 10µF aluminum electrolytic capacitors; ESR requirements defined across –40°C to +85°C - simplifies capacitor selection. |
Applications
| Battery-Powered Instruments | Pagers and Radio Receivers |
|---|---|
Use Scenario: Portable multimeter powered by two AA alkaline cells (3.0V fresh, ~2.0V depleted). IC Role / Device Role / Timing Role: Primary 5V supply regulator with programmable dropout warning to trigger low-battery indicator before system reset. Use Value: Extends usable battery life by 12–18% versus standard LDOs due to 150mV dropout and enables graceful shutdown via DD-driven logic. |
Use Scenario: Miniature FM radio receiver with RF front-end, IF amplifier, and audio stage requiring clean 5V rail. IC Role / Device Role / Timing Role: Low-noise, low-quiescent-current voltage source; LBO monitors battery health to mute audio before brownout. Use Value: 20µA quiescent current prevents parasitic drain during standby; 10µF output cap ensures stability without costly low-ESR ceramics. |
| Solar-Powered Data Loggers | Portable Medical Sensors |
Use Scenario: Field-deployed environmental logger using supercapacitor buffer charged by small solar panel (4–12V input range). IC Role / Device Role / Timing Role: Wide-input LDO regulating 5V for microcontroller and ADC; SET pin configured for 3.3V logic rail via resistor divider. Use Value: +3.5V to +16.5V input range accepts variable solar output; adjustable mode avoids separate 3.3V regulator BOM cost. |
Use Scenario: Wearable pulse oximeter with LED drivers and analog front-end, powered by coin cell (3V nominal). IC Role / Device Role / Timing Role: Precision 3.3V supply with LBO detecting end-of-life battery to initiate data save and safe shutdown. Use Value: 1.22V LBI threshold allows accurate 2.4V cutoff; <1µA shutdown IQ preserves residual energy for final memory write. |
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 |
|---|---|---|---|
| LT1761ES5-5#TRMPBF | Fixed 5V output only; 1.5µA IQ (shutdown), 300mV dropout at 150mA; SOT-23-5 package. | Lacks programmability, LBO, DD, and SHDN functionality; no low-battery or dropout warning outputs. | Select when board space is constrained and only fixed 5V + ultra-low IQ are required; not suitable for systems needing battery monitoring or adjustable output. |
| TPS76350DBVR | Fixed 5V output; 85µA IQ (active), 120mV dropout at 150mA; SOT-23-5; includes power-good flag. | No LBO, DD, or SET pin; PG output replaces LBO but lacks programmable threshold; no shutdown control. | Choose for cost-sensitive, space-limited designs where basic 5V regulation and power-good indication suffice, but battery state awareness is not needed. |
Compared with MAX667ESA+T, LT1761ES5-5#TRMPBF offers lower shutdown IQ but omits all monitoring features, while TPS76350DBVR provides tighter dropout and PG flag yet lacks programmability and dedicated battery detection - MAX667ESA+T uniquely combines adjustable output, triple monitoring (LBO/DD/SHDN), and micropower operation in SO-8.
Availability
MAX667ESA+T is available at Aetrix Electronics and suitable for battery-powered instruments, portable radios, solar-powered loggers, and medical wearables requiring stable component supply across industrial temperature ranges.
Supply support for MAX667ESA+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 demanding industrial, automotive, and communications applications.
The MAX667 belongs to Maxim's micropower LDO regulator family, designed specifically for long-life battery-operated systems requiring low dropout, ultra-low quiescent current, and integrated power supervision functions.
FAQ
What is the maximum input voltage for the MAX667ESA+T?
The MAX667ESA+T has an absolute maximum input voltage rating of +18V. Its recommended operating input range is +3.5V to +16.5V. Exceeding +18V may cause permanent damage. The device is commonly used with single Li-ion (4.2V), three-alkaline (4.5V), or intermediate DC rails up to 16.5V, leveraging its wide input range and low dropout to maximize energy extraction from batteries.
How does the SET pin configure the output voltage on the MAX667ESA+T?
When the SET pin is grounded, the MAX667ESA+T operates in fixed +5V mode using internal feedback resistors. When SET is biased >50mV above GND via an external resistor divider from OUT, the device switches to adjustable mode: VOUT = 1.225V × (R1 + R2)/R1, where R1 connects OUT to SET and R2 connects SET to GND. This enables precise outputs from 1.3V to 16V without trimming.
What is the function of the DD pin on the MAX667ESA+T?
The DD (Dropout Detector) pin on the MAX667ESA+T is an open-collector PNP output that begins sourcing current when VIN–VOUT drops below ~300mV. As the differential decreases further (e.g., to 150mV), DD current increases sharply - providing an analog warning signal of impending regulation loss. A 100kΩ pull-down resistor converts this to a voltage for monitoring by MCU ADC or comparator.
Can the MAX667ESA+T be used with ceramic output capacitors?
The MAX667ESA+T is optimized for aluminum electrolytic or tantalum capacitors (≥10µF) with sufficient ESR to ensure stability. Ceramic capacitors typically have very low ESR and may cause oscillation unless series resistance is added. If using ceramics, a resistor (e.g., 1–2Ω) must be placed in series with the capacitor to meet the minimum ESR requirement specified in Figure 4 of the datasheet across –40°C to +85°C.
What is the quiescent current of the MAX667ESA+T in shutdown mode?
In shutdown mode (SHDN >1.5V), the MAX667ESA+T reduces quiescent current to less than 1µA - typically 0.2µA - while disabling OUT, LBO, and DD outputs. This ultra-low standby current is essential for preserving battery life in infrequently powered systems like remote sensors or emergency beacons, where years of shelf life are required before first use.
MAX667ESA+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:
- Active
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX667ESA+T FAQ
1.How can I place an order for MAX667ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX667ESA+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 MAX667ESA+T reliable?
The price and inventory of MAX667ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX667ESA+T is usually 5 days.
3.What payment methods are accepted for MAX667ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX667ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX667ESA+T?
MAX667ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX667ESA+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 MAX667ESA+T?
For technical support, including MAX667ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX667ESA+T requirements.
6.How does Aetrix verify that MAX667ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX667ESA+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 MAX667ESA+T meets industry standards.
7.What is the process for return or replacement of MAX667ESA+T?
All MAX667ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX667ESA+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 MAX667ESA+T part is unused and in its original packaging.
Return procedure for MAX667ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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