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Analog Devices Inc./Maxim Integrated MAX8667ETEAC+T
- Part No.:
- MAX8667ETEAC+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
MAX8667ETEAC+T.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,588
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Product details
Overview
The MAX8667ETEAC+T from Maxim Integrated is a dual step-down DC-DC converter with integrated dual LDO regulators, designed to power low-voltage microprocessors and DSPs in portable electronics. It delivers guaranteed 600mA on OUT1 and 1200mA on OUT2, features factory-preset output voltages, operates at 1.5MHz hysteretic-PWM, and achieves 100µA no-load supply current with all regulators enabled - enabling compact, high-efficiency power management in space-constrained smartphones and digital cameras.
For engineers reviewing the MAX8667ETEAC+T datasheet, MAX8667ETEAC+T pinout, MAX8667ETEAC+T application, or MAX8667ETEAC+T equivalent, key selection criteria include guaranteed output current per rail (600mA/1200mA), factory-set fixed outputs (no external feedback required), 1.5MHz switching frequency for small 2.2µH inductors, ultra-low quiescent current in multi-rail active mode, and individual enable control for precise power sequencing in battery-powered systems.
Technical Context
The MAX8667ETEAC+T implements two independent hysteretic-PWM step-down regulators (OUT1/OUT2) and two fixed-output LDOs (OUT3/OUT4), each with dedicated enable inputs (EN1–EN4). Its architecture uses internal p-channel MOSFET switches and synchronous rectifiers to achieve high efficiency across load ranges without external diodes.
It integrates undervoltage lockout (UVLO) thresholds of 2.5V (IN12) and 1.6V (IN34), thermal shutdown at +160°C with 15°C hysteresis, and soft-start ramp times of 25µs (OUT1/OUT2) and 45µs (OUT3/OUT4). The device supports input voltage ranges of 2.8V–5.5V (IN12) and 1.7V–5.5V (IN34), with dropout voltages as low as 130mV (LDOs at 300mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Dual buck converters (600mA/1200mA) + dual fixed LDOs (300mA each) |
| Switching Frequency | 1.5MHz - enables use of tiny 2.2µH chip inductors (0805) and reduces EMI filtering burden |
| No-Load Supply Current | 100µA typical with all four regulators enabled - extends battery life in standby modes |
| Input Voltage Ranges | IN12: 2.8V–5.5V; IN34: 1.7V–5.5V - supports single-cell Li-ion and dual-cell NiMH inputs |
| LDO Dropout Voltage | 130mV min at 300mA - allows operation with tight VIN–VOUT margins in low-voltage systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial and consumer portable equipment environments |
| Package | 16-pin thin QFN, 3mm × 3mm - surface-mount footprint optimized for handheld PCB real estate |
Pinout & Package
MAX8667ETEAC+T is housed in a 16-pin, 3mm × 3mm thin QFN package with exposed paddle (EP) that must be connected to GND, PGND1, and PGND2 for thermal and electrical performance. Pin numbering follows standard top-view orientation with Pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2, EN3, EN4 | Individual regulator enable inputs | Active-high logic; each controls startup timing and sequencing independently - eliminates need for external power sequencers |
| OUT1, OUT2 | Step-down converter outputs | Factory-preset voltages; OUT1 = 600mA max, OUT2 = 1200mA max - no external feedback resistors required |
| OUT3, OUT4 | LDO regulator outputs | Fixed 300mA outputs with low noise (75µVRMS) and 57dB PSRR - suitable for analog/RF supply domains |
| IN12, IN34 | Independent input supplies | IN12 powers buck stages (2.8V–5.5V); IN34 powers LDOs (1.7V–5.5V) - enables flexible rail partitioning |
| LX1, LX2 | Switch-node connections | Drive external 2.2µH inductors; internal p-MOSFET + synchronous rectifier eliminate Schottky diode requirement |
| PGND1, PGND2 | Power ground returns | Separate grounds per buck stage reduce cross-coupling and improve transient response |
| GND, EP | Signal and thermal ground | Exposed paddle must be soldered to PCB ground plane for thermal dissipation and noise reduction |
Key Features
| Feature | Design Value |
|---|---|
| Individual enable control per regulator | Enables precise power-up/down sequencing for multi-rail SoCs without external logic or timers |
| 1.5MHz hysteretic-PWM architecture | Reduces external component count: only 2.2µH inductor + 2.2µF ceramic output caps needed per buck stage |
| Ultra-low no-load current (100µA) | Extends battery runtime in always-on subsystems (e.g., baseband processors in sleep mode) |
| Low-noise LDOs (75µVRMS) | Meets stringent noise requirements for camera image sensors and audio codecs without additional LC filtering |
| Thermal shutdown with hysteresis | Auto-recovery at +145°C prevents latch-up during sustained overload or poor heatsinking |
Applications
| Smartphone Baseband Power | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Powers application processor core (VDD_CORE), I/O (VDD_IO), image sensor analog rail (AVDD), and digital rail (DVDD) in compact smartphone PCBs. IC Role / Device Role / Timing Role: Primary multi-rail PMIC delivering factory-set 1.2V/1.8V/2.8V/2.8V with independent EN control for staggered boot sequence. Use Value: Eliminates four discrete regulators and associated passives; reduces BOM count by ≥12 components while maintaining <±3% output accuracy over temperature. | Use Scenario: Supplies clean, low-noise bias to CMOS image sensor analog front-end and ISP core in DSLR-style digital cameras. IC Role / Device Role / Timing Role: Dual LDOs (OUT3/OUT4) provide quiet 2.8V rails; buck converters (OUT1/OUT2) deliver high-current 1.2V/1.8V to digital logic blocks. Use Value: 75µVRMS LDO noise and 57dB PSRR suppress switching artifacts from buck stages, preventing image banding and color distortion. |
| Portable MP3 Player Audio Core | Handheld Medical Instrument |
Use Scenario: Powers DAC, headphone amplifier, and flash memory controller in battery-operated portable audio players. IC Role / Device Role / Timing Role: Buck converters supply 1.2V (DAC core) and 3.3V (memory interface); LDOs deliver 2.8V (analog audio path) and 1.8V (codec I/O). Use Value: 100µA no-load current extends playback time >15% versus discrete solutions; 1.5MHz switching avoids audible beat frequencies in audio band. | Use Scenario: Provides regulated rails for low-power MCU, precision ADC reference, display driver, and wireless transceiver in FDA-class handheld diagnostics devices. IC Role / Device Role / Timing Role: Enables strict sequencing: MCU VDD first (EN1), then ADC ref (EN3), then display (EN2), then RF (EN4) - all within 45µs timing windows. Use Value: Individual EN pins meet IEC 62304 power-up safety requirements; –40°C to +85°C rating ensures reliability in field-deployed units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck + dual-LDO power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8668ETEAC+T | Adjustable buck outputs (0.6V–3.3V) via FB1/FB2 resistive dividers; same LDOs, package, and pinout | Requires external resistors for voltage setting; better for designs needing nonstandard or variable outputs | Select MAX8668ETEAC+T when output flexibility outweighs BOM simplicity; MAX8667ETEAC+T preferred for fixed-voltage production designs. |
| TPS65023RSBR | Three buck converters (600/600/600mA) + two LDOs (200/200mA); 48-pin QFN; different pinout and sequencing logic | Higher channel count but lower per-rail current; lacks individual EN per LDO; requires external POR circuitry | Choose TPS65023RSBR only if third buck rail is essential; MAX8667ETEAC+T offers superior LDO current (300mA vs. 200mA) and simpler enable architecture. |
Compared with MAX8668ETEAC+T, the MAX8667ETEAC+T saves board space and cost by eliminating feedback resistors, while retaining identical thermal, timing, and sequencing behavior. Against TPS65023RSBR, it provides higher LDO current capability and true per-rail enable control - critical for medical and imaging applications requiring deterministic power-up order.
Availability
MAX8667ETEAC+T is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera sensor bias, and portable medical instrument applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX8667ETEAC+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 industrial, communications, and consumer markets.
The MAX8667/MAX8668 product line was engineered specifically for space-constrained portable electronics, integrating dual high-current buck converters and dual low-noise LDOs into a single 3mm × 3mm package to replace multiple discrete regulators in smartphones and digital cameras.
FAQ
What output voltages does the MAX8667ETEAC+T provide?
The MAX8667ETEAC+T features factory-preset output voltages: OUT1 and OUT2 are fixed step-down outputs (typically 1.2V and 1.8V per selector guide), while OUT3 and OUT4 are fixed LDO outputs (typically 2.8V each). No external feedback resistors are required - all voltages are trimmed at wafer test and guaranteed over temperature.
Does the MAX8667ETEAC+T require external compensation components?
No, the MAX8667ETEAC+T uses a proprietary hysteretic-PWM control scheme that is internally compensated. It operates stably with only a 2.2µH inductor and 2.2µF ceramic output capacitor per buck stage - no external compensation network or loop-filter components are needed.
How does the enable sequencing work on the MAX8667ETEAC+T?
The MAX8667ETEAC+T provides four independent enable inputs (EN1–EN4). The first regulator enabled after shutdown has a 25µs (buck) or 45µs (LDO) power-on delay (tPWRON); subsequent enables have shorter delays (tEN = 15µs or 35µs). This allows precise, software-controlled power sequencing without external timers.
What is the minimum input voltage required for the LDOs in the MAX8667ETEAC+T?
The LDOs (OUT3/OUT4) in the MAX8667ETEAC+T operate down to 1.7V on IN34. Undervoltage lockout disables them when IN34 falls below 1.5V (typical), and they resume soft-start when IN34 rises above 1.6V (typical) - ensuring reliable operation across single-cell Li-ion discharge profiles.
Can the MAX8667ETEAC+T be used in automotive applications?
The MAX8667ETEAC+T is specified for –40°C to +85°C operation and is not AEC-Q200 qualified. While it may function in cabin-temperature automotive infotainment modules, it is not recommended for under-hood or ADAS applications requiring extended temperature range or automotive qualification. Use only in consumer-grade portable automotive accessories.
MAX8667ETEAC+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Topology:
- Step-Down (Buck) Synchronous (2), Linear (LDO) (2)
- Number of Outputs:
- 4
- Frequency - Switching:
- 1.5MHz
- Voltage/Current - Output 1:
- 1.2V, 600mA
- Voltage/Current - Output 2:
- 1.8V, 1.2A
- Voltage/Current - Output 3:
- 1.2V, 300mA
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 2.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
MAX8667ETEAC+T FAQ
1.How can I place an order for MAX8667ETEAC+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8667ETEAC+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 MAX8667ETEAC+T reliable?
The price and inventory of MAX8667ETEAC+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8667ETEAC+T is usually 5 days.
3.What payment methods are accepted for MAX8667ETEAC+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8667ETEAC+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8667ETEAC+T?
MAX8667ETEAC+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8667ETEAC+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 MAX8667ETEAC+T?
For technical support, including MAX8667ETEAC+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8667ETEAC+T requirements.
6.How does Aetrix verify that MAX8667ETEAC+T is sourced from the original manufacturer or authorized distributors?
All MAX8667ETEAC+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 MAX8667ETEAC+T meets industry standards.
7.What is the process for return or replacement of MAX8667ETEAC+T?
All MAX8667ETEAC+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8667ETEAC+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 MAX8667ETEAC+T part is unused and in its original packaging.
Return procedure for MAX8667ETEAC+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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