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Analog Devices Inc./Maxim Integrated MAX667ESA
- Part No.:
- MAX667ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX667ESA.pdf
- Description:
- IC REG LIN POS ADJ 250MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,930
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Product details
Overview
The MAX667ESA 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 and quiescent current of 20µA in normal operation. It features Dual Mode™ operation-fixed +5V output or adjustable output (1.3V to 16V) via external resistors-and integrated low-battery detection (LBI/LBO), shutdown control (SHDN), and dropout warning (DD). It is used in battery-powered instrumentation and portable radios requiring stable, low-quiescent-power regulation.
For engineers reviewing the MAX667ESA datasheet, MAX667ESA pinout, MAX667ESA application, or MAX667ESA equivalent, key selection criteria include dropout voltage at 200mA, shutdown quiescent current (<1µA), LBO open-drain compatibility, SET-input programmability, and −40°C to +85°C industrial temperature rating in 8-pin SO package.
Technical Context
The MAX667ESA employs a PNP pass transistor architecture with micropower bandgap reference (1.22V trimmed), error amplifier, and dual comparators-one for mode selection (fixed vs. adjustable output via SET pin logic), the other for low-battery detection (LBI threshold ≈1.22V). Its Dual Mode™ operation switches feedback path internally when SET is grounded (fixed 5V) or elevated >50mV (external resistor divider sets VOUT).
Dropout detection is implemented via DD pin-an open-collector PNP output sourcing current as VIN–VOUT approaches ~300mV-enabling early warning of regulation loss. Shutdown (SHDN) disables OUT, LBO, and DD while reducing IQ to <1µA; SHDN input threshold is 1.5V with ±0.3V absolute max overdrive relative to VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 250mA maximum-supports moderate-power microcontrollers and analog sensors without external boost. |
| Dropout Voltage | 150mV typical at 200mA-enables operation down to VIN = VOUT + 0.15V, extending battery life in 5V systems. |
| Quiescent Current | 20µA typical (normal), <1µA (shutdown)-critical for multi-year battery life in pagers and solar instruments. |
| Input Voltage Range | +3.5V to +16.5V-covers single Li-ion, multi-cell alkaline, and regulated intermediate rails. |
| Output Options | Fixed +5V (SET = GND) or adjustable 1.3V–16V (via R1/R2 divider)-provides design flexibility without BOM proliferation. |
| Low-Battery Detection | LBI threshold = 1.22V ±25mV; LBO is open-drain N-FET-allows user-defined battery cutoff using external resistor divider. |
| Operating Temperature | −40°C to +85°C-qualified for industrial and extended-temperature portable equipment environments. |
Pinout & Package
MAX667ESA is housed in an 8-pin SO (Small Outline) package, surface-mount compatible, with standard JEDEC MS-012AC footprint and thermal pad omitted.
| 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 signaling before regulation loss. |
| 2 - OUT | Regulated Output | Main power rail output; requires ≥10µF capacitor (min ESR per temp) for stability; drops to 0V when SHDN active. |
| 3 - LBI | Low-Battery Input | CMOS input to internal 1.22V comparator; threshold set by external resistor divider-enables customizable battery cutoff voltage. |
| 4 - GND | Ground Reference | Analog and power ground return for regulator core, comparators, and reference-must be low-impedance for accuracy. |
| 5 - SHDN | Shutdown Control | CMOS input; <1.5V enables regulation, >1.5V disables OUT/LBO/DD and reduces IQ to <1µA-no pull-up required. |
| 6 - SET | Output Voltage Select | CMOS input; grounded → fixed 5V; >50mV → feedback routed to external divider-determines VOUT = 1.22V × (R1+R2)/R1. |
| 7 - LBO | Low-Battery Output | Open-drain N-FET output sinking current when LBI < 1.22V-requires external pull-up (≥10kΩ to OUT) for logic-level signaling. |
| 8 - IN | Unregulated Input | Positive supply input; absolute max +18V; must exceed VOUT by ≥ dropout voltage to maintain regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Output Configuration | Single IC supports both fixed +5V (zero external parts) and programmable output (1.3V–16V) via two resistors-reduces SKU count and simplifies design reuse. |
| Ultra-Low Quiescent Current | 20µA typical in active mode, <1µA in shutdown-enables decade-scale battery life in always-on monitoring devices. |
| Integrated Low-Battery Detection | Dedicated LBI/LBO pins with 1.22V reference allow precise, user-configurable battery end-of-life signaling without external comparators. |
| Dropout Warning Output (DD) | DD pin provides analog warning signal (current source) as VIN–VOUT approaches dropout-enables graceful system shutdown before brownout. |
| Robust Input Voltage Range | +3.5V to +16.5V operation accommodates wide battery chemistries (1–10 cells) and legacy supply rails without pre-regulation. |
Applications
| Pager Power Management | Portable Data Logger |
|---|---|
|
Use Scenario: Compact pager receiving intermittent RF bursts with long idle periods between alerts. IC Role / Device Role / Timing Role: Primary 5V supply regulator with shutdown-triggered sleep mode and LBO-driven low-battery alert. Use Value: 20µA quiescent current extends AA/AAA battery life to >1 year; DD output warns of imminent regulation loss before message loss. |
Use Scenario: Solar-powered environmental sensor node logging temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Adjustable-output regulator (set to 3.3V) powering MCU and ADC, with LBI monitoring battery voltage decay. Use Value: Programmable output avoids separate 3.3V LDO; LBO triggers data flush and deep sleep when solar charge falls below threshold. |
| Handheld Radio Receiver | Medical Diagnostic Instrument |
|
Use Scenario: Battery-operated UHF receiver with analog front-end and digital demodulator requiring clean 5V rail. IC Role / Device Role / Timing Role: Low-noise, low-dropout 5V regulator with minimal output capacitance (10µF) and high PSRR at audio frequencies. Use Value: 150mV dropout preserves usable battery range down to 5.15V; PNP architecture ensures no reverse current during battery swap. |
Use Scenario: Portable blood glucose meter with LCD, button interface, and precision analog front-end. IC Role / Device Role / Timing Role: Fixed +5V regulator powering display driver and op-amp circuitry, with LBO signaling end-of-life battery replacement. Use Value: Guaranteed 250mA output drives peak LCD backlight current; LBO open-drain output interfaces directly to MCU GPIO with no level-shifting. |
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 |
|---|---|---|---|
| MAX666ESA | Lower output current (150mA), higher dropout (250mV typ at 150mA), same pinout and feature set except no DD pin. | Suitable where load current ≤150mA and dropout warning is not required; lacks DD functionality for predictive shutdown. | Select MAX666ESA only if 150mA suffices and dropout detection is unnecessary-MAX667ESA offers superior current and diagnostics. |
| TPS76350DBVR | Fixed 5V output only; 150mA max; 120mV dropout at 150mA; 1.2µA shutdown IQ; no LBO/DD/SET pins. | Targeted at ultra-low-IQ, cost-sensitive 5V-only apps; lacks programmability, battery monitoring, and dropout warning. | Choose TPS76350DBVR for simpler, lower-cost 5V regulation where diagnostics and flexibility are not needed. |
Compared with MAX666ESA and TPS76350DBVR, the MAX667ESA uniquely combines 250mA drive, adjustable/fixed output, integrated LBO/DD/SHDN, and industrial temperature range-making it optimal for feature-rich portable instrumentation requiring diagnostic capability and long battery life.
Availability
MAX667ESA is available at Aetrix Electronics and suitable for battery-powered devices, portable instruments, and solar-powered measurement systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX667ESA 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, medical, and communications applications.
The MAX667ESA belongs to Maxim's micropower linear regulator family, engineered specifically for battery-constrained portable systems needing low dropout, low IQ, and integrated power-monitoring functions.
FAQ
What is the maximum output current specification for the MAX667ESA?
The MAX667ESA delivers up to 250mA of continuous output current under specified thermal conditions. This rating is guaranteed across the full −40°C to +85°C operating temperature range when used with appropriate PCB copper area and within power dissipation limits. At 200mA load, typical dropout voltage is 150mV, confirming robust performance near maximum current. The MAX667ESA maintains regulation integrity even with transient loads up to this limit, making it suitable for driving microcontrollers, sensors, and small displays.
How does the SET pin determine output voltage on the MAX667ESA?
The SET pin on the MAX667ESA controls output configuration: grounding SET selects fixed +5V output using internal resistors; applying >50mV to SET routes feedback to external resistors R1 and R2, enabling adjustable output from 1.3V to 16V per VOUT = 1.22V × (R1 + R2)/R1. Input bias current at SET is ≤10nA, allowing MΩ-range resistors without accuracy loss. The MAX667ESA's internal 1.22V reference tolerance (±25mV) ensures predictable output setting without trimming.
What is the function of the DD pin on the MAX667ESA?
The DD (Dropout Detector) pin on the MAX667ESA is an open-collector PNP output that begins sourcing current when VIN–VOUT falls below ~300mV-providing early warning of impending regulation loss. Unlike a digital flag, DD delivers analog current proportional to differential voltage reduction, enabling threshold detection via simple resistor-to-ground conversion. This allows system-level circuits to initiate controlled shutdown before brownout. The MAX667ESA's DD functionality is absent in pin-compatible predecessors like the MAX666ESA.
Can the MAX667ESA operate with input voltages below 5V?
Yes-the MAX667ESA supports input voltages as low as +3.5V, making it viable for single-cell Li-ion (fully charged ~4.2V) or three-alkaline (4.5V) configurations when regulating to 3.3V or lower outputs. In adjustable mode with VOUT = 3.3V, dropout of 150mV means regulation holds down to VIN = 3.45V. However, fixed +5V operation requires VIN ≥ 5.15V minimum to sustain regulation. The MAX667ESA's wide 3.5V–16.5V input range ensures flexibility across diverse battery chemistries and supply topologies.
What is the shutdown quiescent current of the MAX667ESA?
The MAX667ESA draws less than 1µA typical quiescent current in shutdown mode, activated when SHDN pin voltage exceeds 1.5V. This ultra-low standby current is critical for multi-year battery life in infrequently powered devices such as remote sensors or emergency beacons. During shutdown, OUT, LBO, and DD are all disabled-only leakage paths remain active. The MAX667ESA's <1µA shutdown IQ is significantly lower than many competing regulators, reinforcing its suitability for energy-harvesting and long-duration portable applications.
MAX667ESA 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX667ESA FAQ
1.How can I place an order for MAX667ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX667ESA 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 reliable?
The price and inventory of MAX667ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX667ESA is usually 5 days.
3.What payment methods are accepted for MAX667ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX667ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX667ESA?
MAX667ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX667ESA 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?
For technical support, including MAX667ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX667ESA requirements.
6.How does Aetrix verify that MAX667ESA is sourced from the original manufacturer or authorized distributors?
All MAX667ESA 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 meets industry standards.
7.What is the process for return or replacement of MAX667ESA?
All MAX667ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX667ESA, 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 part is unused and in its original packaging.
Return procedure for MAX667ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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