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Analog Devices Inc./Maxim Integrated MAX1976EZT285
- Part No.:
- MAX1976EZT285
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MAX1976EZT285.pdf
- Description:
- IC REG LINEAR 300MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:1,281
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Product details
Overview
MAX1976EZT285 from Maxim Integrated is a low-dropout linear regulator (LDO) with integrated active-low reset output, designed for battery-powered portable systems. It delivers 300mA continuous output current with ±0.5% output voltage accuracy, 100mV dropout at full load, and operates from 1.62V to 3.6V input - enabling use in 1-cell Li-ion or multi-cell alkaline applications such as notebook computers and digital cameras.
For engineers reviewing the MAX1976EZT285 datasheet, MAX1976EZT285 pinout, MAX1976EZT285 application, or MAX1976EZT285 equivalent, key selection criteria include its 70ms reset delay, SOT23-6 package footprint, 2.85V preset output, thermal-overload protection, and logic-controlled shutdown with sub-1µA off-state current.
Technical Context
The MAX1976EZT285 uses an internal P-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) to achieve low dropout and supply-current independence from load or dropout voltage. Its error amplifier compares a trimmed bandgap reference against feedback from a fixed internal divider, delivering stable 2.85V output without external resistors.
Reset functionality is implemented via a dedicated comparator monitoring VOUT, asserting active-low RESET when output falls below 82.5% of nominal (2.35V) and holding it asserted for ≥70ms after regulation is achieved. Shutdown control is TTL/CMOS-compatible with <1nA bias current and 90µs turn-on delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Preset 2.85V ±0.5% - eliminates need for external feedback resistors and ensures tight regulation across load/line/temp. |
| Max Output Current | 300mA continuous - supports core logic rails or high-efficiency analog subsystems in space-constrained designs. |
| Dropout Voltage | 100mV at 300mA - enables operation down to ~2.75V input with 2.85V output, extending usable battery life in single-cell Li-ion systems. |
| Reset Delay | 70ms (min) - provides reliable power-good timing for microcontrollers requiring extended stabilization before boot. |
| Quiescent Current | 90µA typical at full load - maintains ultra-low system standby power without sacrificing transient response. |
| Input Voltage Range | 1.62V to 3.6V - compatible with 1-cell Li-ion (2.7–4.2V), NiMH, or regulated 3.3V/2.5V supplies. |
| Shutdown Current | 0.001µA at +25°C - reduces system leakage to negligible levels during deep sleep modes. |
Pinout & Package
MAX1976EZT285 is housed in a 6-pin thin SOT23-6 package (package code Z6-1), height <1.1mm, footprint 2.9mm × 1.6mm. The exposed pad is absent - GND connections are made only through pins 2 and 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 1.62V–3.6V supply; requires ≥1µF ceramic bypass to GND for stability. |
| 2 (GND) | Ground Reference | Primary ground return path; soldered to PCB ground plane for thermal dissipation and noise immunity. |
| 3 (SHDN) | Active-Low Shutdown Control | Logic-low (<0.6V) disables regulator and pulls RESET low; <1nA input bias enables direct MCU GPIO drive. |
| 4 (RESET) | Open-Drain Reset Output | Asserts low until VOUT reaches regulation, then holds low for ≥70ms before releasing - compatible with standard µP reset inputs. |
| 5 (I.C.) | Internally Connected | No external connection required; leave floating or tie to GND per layout best practice. |
| 6 (OUT) | Regulated Output | Delivers up to 300mA at 2.85V; requires ≥4.7µF low-ESR ceramic capacitor to GND for transient stability. |
Key Features
| Feature | Design Value |
|---|---|
| Preset 2.85V Output | Factory-trimmed internal feedback eliminates external resistor network, reducing BOM count and layout area. |
| 70ms Reset Timeout | Guaranteed minimum assertion time ensures robust microprocessor initialization even under slow-ramping input conditions. |
| Thermal & Short-Circuit Protection | Auto-recovering shutdown at +165°C junction temperature with 15°C hysteresis prevents permanent damage during fault events. |
| Logic-Controlled Shutdown | Sub-1µA quiescent current in shutdown mode enables long-term battery retention in always-on IoT edge nodes. |
| Low-Noise Operation | 86µVRMS output noise (10Hz–100kHz) supports noise-sensitive analog circuits like ADC references or RF bias rails. |
Applications
| Notebook Computers | Digital Cameras |
|---|---|
Use Scenario: Powering image sensor I/O interface and ISP core logic from a shared 3.3V rail derived from a single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary 2.85V LDO with integrated reset, providing clean, sequenced power to camera subsystem during wake-from-sleep transitions. Use Value: 70ms RESET delay ensures stable sensor initialization before frame capture begins; 100mV dropout extends usable battery range by ~150mV over competing regulators. | Use Scenario: Supplying 2.85V to CMOS image sensor analog front-end and autofocus motor driver ICs in compact point-and-shoot devices. IC Role / Device Role / Timing Role: Low-noise, high-accuracy voltage source with thermal protection - critical for maintaining image SNR and preventing thermal shutdown during burst-mode capture. Use Value: 86µVRMS noise and ±0.5% accuracy preserve analog signal fidelity; 0.33Ω RDS(ON) minimizes self-heating during sustained 300mA bursts. |
| Cellular Telephones | PCMCIA Cards |
Use Scenario: Regulating 2.85V for baseband processor I/O banks and RF transceiver bias in dual-SIM smartphones with tight board area constraints. IC Role / Device Role / Timing Role: Compact SOT23-6 LDO with integrated reset - replaces discrete reset IC + regulator combo, saving >2mm² PCB area. Use Value: Tiny 2.9mm × 1.6mm footprint and <1.1mm height enable placement under shields or in narrow side-edge zones; 90µA IQ supports multi-day standby. | Use Scenario: Providing 2.85V to PCMCIA card controller and flash memory interface in industrial data-acquisition modules. IC Role / Device Role / Timing Role: Fault-tolerant power supervisor - combines regulation, reset timing, and thermal protection in one device for hot-plug reliability. Use Value: Thermal shutdown with auto-recovery prevents lockup during card insertion surge; open-drain RESET interfaces directly with host-side power management logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator with reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1963EZT285 | 2.2ms reset delay vs. 70ms; otherwise identical pinout, specs, and package. | Suitable for fast-boot MCUs requiring minimal reset hold time; not interchangeable where 70ms timing is mandated. | Select MAX1963EZT285 only if system boot sequence tolerates shorter reset assertion. |
| Torex XC6219B285MR-G | 200mA max output, no integrated reset output; requires external reset IC for supervision. | Lacks built-in reset function - increases component count and board area; suitable only where reset is handled elsewhere. | Choose only if 300mA capability is unnecessary and external reset generation is already present in design. |
Compared with MAX1963EZT285, the MAX1976EZT285 provides longer reset timing critical for complex processors, while the XC6219B285MR-G trades integration for lower cost in simpler systems - making MAX1976EZT285 optimal for space- and timing-constrained portable designs requiring guaranteed 70ms power-good assertion.
Availability
MAX1976EZT285 is available at Aetrix Electronics and suitable for notebook computers, digital cameras, and cellular telephones requiring stable component supply with guaranteed 2.85V output, 70ms reset timing, and SOT23-6 footprint compatibility.
Supply support for MAX1976EZT285 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 applications.
The MAX1963/MAX1976 product line was engineered for ultra-low-voltage, high-accuracy regulation in portable battery-powered equipment - emphasizing minimal dropout, integrated supervision, and compact packaging for space-constrained handheld devices.
FAQ
What is the exact output voltage of the MAX1976EZT285?
The MAX1976EZT285 features a factory-preset output voltage of 2.85V with ±0.5% accuracy over load, line, and temperature (–40°C to +85°C). This value is trimmed internally and requires no external resistors - confirmed in the Electrical Characteristics table and Selector Guide of the official datasheet.
Does the MAX1976EZT285 require external capacitors, and what values are recommended?
Yes, the MAX1976EZT285 requires a 1µF ceramic capacitor between IN and GND, and a 4.7µF low-ESR ceramic capacitor between OUT and GND. These values ensure stability, transient response, and noise suppression across –40°C to +85°C - specified in the Applications Information section of the MAX1976 datasheet.
What is the reset timeout duration for the MAX1976EZT285, and how is it triggered?
The MAX1976EZT285 asserts its open-drain RESET output low until VOUT reaches regulation, then holds it low for a guaranteed minimum of 70ms before releasing. RESET falls immediately if VOUT drops below 82.5% of 2.85V (i.e., 2.35V) or during SHDN activation - detailed in the RESET OUTPUT section of the datasheet.
Can the MAX1976EZT285 be used with a 1.8V input supply to deliver 2.85V?
No - the MAX1976EZT285 cannot regulate 2.85V from a 1.8V input because the minimum input voltage must exceed the output voltage by the dropout voltage (≥100mV at 300mA). A 1.8V input is insufficient; minimum valid input is ~2.95V for 2.85V output - per Absolute Maximum Ratings and Dropout Voltage specifications.
Is the MAX1976EZT285 RoHS-compliant and lead-free?
Yes, the MAX1976EZT285 is RoHS-compliant and lead-free. Per Maxim's ordering information, part numbers ending in "+" (e.g., MAX1976EZT285+) denote lead-free variants; the base part MAX1976EZT285 is also manufactured to RoHS standards as confirmed in Materials Analysis documentation on maxim-ic.com.
MAX1976EZT285 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 3.6V
- Voltage - Output (Min/Fixed):
- 2.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.2V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 140 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable, Reset
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
MAX1976EZT285 FAQ
1.How can I place an order for MAX1976EZT285 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1976EZT285 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 MAX1976EZT285 reliable?
The price and inventory of MAX1976EZT285 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1976EZT285 is usually 5 days.
3.What payment methods are accepted for MAX1976EZT285?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1976EZT285 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1976EZT285?
MAX1976EZT285 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1976EZT285 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 MAX1976EZT285?
For technical support, including MAX1976EZT285 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1976EZT285 requirements.
6.How does Aetrix verify that MAX1976EZT285 is sourced from the original manufacturer or authorized distributors?
All MAX1976EZT285 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 MAX1976EZT285 meets industry standards.
7.What is the process for return or replacement of MAX1976EZT285?
All MAX1976EZT285 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1976EZT285, 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 MAX1976EZT285 part is unused and in its original packaging.
Return procedure for MAX1976EZT285:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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