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Analog Devices Inc./Maxim Integrated MAX667CSA+T
- Part No.:
- MAX667CSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX667CSA+T.pdf
- Description:
- IC REG LIN POS ADJ 250MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,870
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Product details
Overview
MAX667CSA+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 0.2µA in shutdown mode. It features Dual Mode™ operation (fixed +5V or adjustable 1.3V–16V output), integrated low-battery detector (LBO/LBI), and dropout detector (DD), designed for battery-powered portable instruments and solar-powered devices.
For engineers reviewing the MAX667CSA+T datasheet, MAX667CSA+T pinout, MAX667CSA+T application, or MAX667CSA+T equivalent, key selection criteria include dropout voltage vs. load, shutdown threshold accuracy, LBO open-drain sink capability, SET input bias current (<10nA), and SO-8 thermal dissipation limits (471mW at +70°C).
Technical Context
The MAX667CSA+T uses a PNP pass transistor architecture with micropower bandgap reference trimmed to 1.22V, enabling ultra-low quiescent current. Its error amplifier compares either internal 5V divider or external SET-resistor feedback to maintain regulation.
Dual Mode™ switching between fixed and adjustable output is controlled by SET pin voltage (>50mV above GND enables external resistor programming). The LBO comparator monitors LBI against 1.22V reference, while DD provides early-warning current sourcing as VIN–VOUT approaches 300mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 250mA max - supports moderate-power microcontrollers and analog sensors without external boost. |
| Dropout Voltage | 150mV typ @ 200mA - enables >95% efficiency from 5.15V input to 5V output. |
| Quiescent Current | 20µA typ normal / 0.2µA typ shutdown - extends battery life in sleep-mode portable systems. |
| Input Voltage Range | +3.5V to +16.5V - accommodates single Li-ion (4.2V), dual alkaline (3V), or 12V industrial rails. |
| SET Reference Voltage | 1.225V ±25mV - enables precise programmable output using standard 1% resistors (e.g., R1=1MΩ, R2=3.1MΩ for 5V). |
| LBI Threshold Voltage | 1.225V ±30mV - allows configurable low-battery warning via external resistor divider on LBI pin. |
| SHDN Threshold | VIL ≤ 0.3V, VIH ≥ 1.5V - ensures robust noise immunity and compatibility with 3.3V/5V logic control signals. |
Pinout & Package
MAX667CSA+T is housed in an 8-pin SO (Small Outline) package, surface-mount compatible, with 1.27mm pitch and JEDEC MS-012AC footprint. Thermal resistance θJA = 170°C/W; power dissipation derated at 5.88mW/°C above +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - DD | Dropout Detector Output | PNP collector open-circuit output; sources current when VIN–VOUT < 300mV - used for early-regulation-loss warning. |
| 2 - OUT | Regulated Output | Delivers stable +5V (fixed) or programmable voltage; requires ≥10µF output capacitor for stability. |
| 3 - LBI | Low-Battery Input | CMOS input to 1.22V comparator; sets battery depletion threshold via external resistor divider. |
| 4 - GND | Ground Reference | Common return for regulator, detectors, and shutdown circuitry - must be low-impedance connection. |
| 5 - SHDN | Shutdown Control | Active-high enable; pulls high (>1.5V) to disable OUT/LBO/DD and reduce IQ to <1µA. |
| 6 - SET | Output Voltage Select | CMOS input; grounded for +5V fixed mode; >50mV enables external resistor programming (VOUT = 1.22V × (R1+R2)/R1). |
| 7 - LBO | Low-Battery Output | Open-drain N-channel FET; sinks current when LBI < 1.22V - requires external pull-up to VOUT or logic rail. |
| 8 - IN | Unregulated Input | Accepts +3.5V to +16.5V; must be filtered to limit ripple due to low PSRR of micropower error amplifier. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Output Configuration | Fixed +5V (zero external parts) or adjustable 1.3V–16V via two resistors - eliminates BOM variants for multiple voltage needs. |
| Ultra-Low Quiescent Current | 20µA typical in active mode, 0.2µA in shutdown - enables multi-year operation from coin cells in pagers and remote sensors. |
| Integrated Low-Battery Detection | 1.22V precision reference with open-drain LBO output - reduces system component count versus discrete comparator solutions. |
| Dropout Warning Function | DD pin sources current starting at ~300mV VIN–VOUT differential - enables predictive battery management before regulation loss. |
| Robust Input Voltage Range | +3.5V to +16.5V operation with 18V absolute max - supports wide-input applications including solar chargers and automotive accessory rails. |
Applications
| Pager Power Management | Solar-Powered Data Logger |
|---|---|
Use Scenario: Compact pager with intermittent RF transmission and long standby periods. IC Role / Device Role / Timing Role: Primary 5V supply for baseband IC and display driver, with SHDN controlled by host MCU during sleep. Use Value: 0.2µA shutdown current extends shelf life beyond 5 years on CR2032; LBO triggers alert before battery voltage drops below 3.0V. |
Use Scenario: Field-deployed environmental sensor powered by small solar panel and supercapacitor buffer. IC Role / Device Role / Timing Role: Stable 5V rail for ADC, microcontroller, and wireless transceiver during variable illumination conditions. Use Value: 150mV dropout allows usable operation down to 5.15V input - maximizes energy harvest time per charge cycle. |
| Portable Medical Instrument | Radio-Controlled Receiver |
Use Scenario: Handheld pulse oximeter with OLED display and analog front-end requiring clean, low-noise 5V. IC Role / Device Role / Timing Role: Main voltage regulator with 10µF output capacitor ensuring stability across temperature (−40°C to +85°C). Use Value: 20µA quiescent current preserves battery during measurement pauses; DD signal warns of impending brownout before data corruption. |
Use Scenario: Miniature RC receiver module in drones or toys, operating from 2xAA or LiPo batteries. IC Role / Device Role / Timing Role: Regulator for 5V logic and servo interface; SET pin tied to GND for fixed output; LBI monitors battery pack voltage. Use Value: Programmable LBI threshold (e.g., 6.0V) prevents motor stall by triggering low-voltage cutoff before cell undervoltage damage. |
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 |
|---|---|---|---|
| TPS76350DBVR | Fixed 5V output only; 120mV dropout @ 150mA; 80µA IQ; no LBO/DD/SET pins. | Lacks battery monitoring and programmability - suitable only for simple 5V rail where detection functions are handled externally. | Select when cost and board space are critical, and system already includes separate battery monitor. |
| MCP1826-5002E/DB | Fixed 5V; 350mV dropout @ 250mA; 120µA IQ; no shutdown or detection outputs. | No SHDN, LBO, or DD - requires external logic for power sequencing and battery alerts. | Choose for industrial environments where extended temperature range (−40°C to +125°C) is required over MAX667CSA+T's 0°C to +70°C. |
Compared with MAX667CSA+T, TPS76350DBVR offers lower dropout but omits all monitoring features, while MCP1826-5002E/DB provides wider temperature tolerance but sacrifices integration - MAX667CSA+T remains optimal where programmability, ultra-low IQ, and built-in battery management are co-required.
Availability
MAX667CSA+T is available at Aetrix Electronics and suitable for battery-powered devices, portable instruments, and solar-powered instruments requiring stable component supply with long-lifecycle support and traceable sourcing.
Supply support for MAX667CSA+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) designs precision analog and mixed-signal ICs for power management, sensing, and communication in constrained environments.
The MAX667CSA+T belongs to Maxim's micropower LDO regulator family, engineered specifically for battery longevity and intelligent power monitoring in portable and energy-harvesting systems.
FAQ
What is the maximum output current specification for MAX667CSA+T?
The MAX667CSA+T delivers up to 250mA of continuous output current under specified thermal conditions. This rating assumes proper PCB layout for heat dissipation and operation within the SO-8 package's 471mW power limit at +70°C ambient. At higher loads or elevated temperatures, derating applies per the Absolute Maximum Ratings table. The MAX667CSA+T maintains regulation down to 150mV dropout at 200mA, making it suitable for high-efficiency battery-powered applications.
How does the SET pin determine output voltage in MAX667CSA+T?
In MAX667CSA+T, grounding the SET pin configures fixed +5V output using internal resistive feedback. When SET is biased >50mV above GND, the error amplifier switches to external resistor divider feedback, enabling programmable output from +1.3V to +16V using VOUT = 1.225V × (R1 + R2)/R1. The MAX667CSA+T's SET input leakage current is <10nA, allowing use of high-value resistors (e.g., 1MΩ) without accuracy loss.
What is the function of the DD pin on MAX667CSA+T?
The DD (Dropout Detector) pin on MAX667CSA+T is an open-collector PNP output that begins sourcing current when the input-to-output differential falls below ~300mV - providing early warning of impending regulation loss. Connecting a 100kΩ resistor from DD to GND generates a voltage ramp usable by analog circuits or comparators. This feature enables predictive battery management not found in basic LDOs, and is integral to the MAX667CSA+T's system-level power intelligence.
Can MAX667CSA+T operate with input voltages below 3.5V?
No - the MAX667CSA+T has a minimum input voltage requirement of +3.5V for guaranteed regulation, as specified in its Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this level may result in loss of output regulation, unpredictable LBO/DD behavior, or failure to activate the internal bandgap reference. For sub-3.5V applications, alternative regulators such as the MAX8867 (2.5V min IN) should be evaluated instead of MAX667CSA+T.
What is the recommended output capacitor for MAX667CSA+T stability?
A minimum 10µF output capacitor is recommended for MAX667CSA+T stability, with sufficient ESR to meet the minimum values shown in Figure 4 of the datasheet (e.g., ~1Ω at +25°C, rising to ~5Ω at −40°C). Aluminum electrolytic capacitors typically meet this requirement across temperature. If low-ESR tantalum or ceramic types are used, a series resistor may be needed to ensure phase margin - the MAX667CSA+T's PNP architecture requires controlled ESR for loop stability.
MAX667CSA+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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX667CSA+T FAQ
1.How can I place an order for MAX667CSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX667CSA+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 MAX667CSA+T reliable?
The price and inventory of MAX667CSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX667CSA+T is usually 5 days.
3.What payment methods are accepted for MAX667CSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX667CSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX667CSA+T?
MAX667CSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX667CSA+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 MAX667CSA+T?
For technical support, including MAX667CSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX667CSA+T requirements.
6.How does Aetrix verify that MAX667CSA+T is sourced from the original manufacturer or authorized distributors?
All MAX667CSA+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 MAX667CSA+T meets industry standards.
7.What is the process for return or replacement of MAX667CSA+T?
All MAX667CSA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX667CSA+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 MAX667CSA+T part is unused and in its original packaging.
Return procedure for MAX667CSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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