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Analog Devices Inc./Maxim Integrated MAX1976ETT300
- Part No.:
- MAX1976ETT300
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX1976ETT300.pdf
- Description:
- IC REG LINEAR 300MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:768
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Product details
Overview
The MAX1976ETT300 from Maxim Integrated is a low-dropout linear regulator delivering a fixed 3.0V output at up to 300mA continuous load current, with ±0.5% output voltage accuracy over load/line/temperature, 100mV dropout at full load, and a 70ms active-low open-drain RESET flag assertion time - designed for power management in space-constrained portable electronics such as notebook computers and digital cameras.
For engineers reviewing the MAX1976ETT300 datasheet, MAX1976ETT300 pinout, MAX1976ETT300 application, or MAX1976ETT300 equivalent, key selection criteria include its 1.62V minimum input voltage, thermal-overload and short-circuit protection, logic-controlled shutdown, supply-current independence from load/dropout, and compatibility with low-ESR ceramic capacitors (1µF IN / 4.7µF OUT).
Technical Context
The MAX1976ETT300 integrates a P-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) enabling low quiescent current (90µA typ at 300mA) independent of load or dropout voltage. Its internal feedback divider sets a factory-trimmed 3.0V output, eliminating external resistors.
A dedicated power-good comparator monitors VOUT, asserting the open-drain RESET output when VOUT falls below 82.5% of nominal (±1.7% hysteresis); RESET remains asserted for ≥70ms after VOUT reaches regulation, supporting reliable microprocessor startup sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±0.5% - eliminates need for external feedback resistors and ensures stable core/peripheral rail in battery-powered systems. |
| Max Output Current | 300mA continuous - sufficient for powering DSPs, memory, or RF ICs in handheld devices without external boost circuitry. |
| Dropout Voltage | 100mV at 300mA - enables operation down to 3.1V input when regulating 3.0V, extending usable battery life in single-cell Li-ion applications. |
| RESET Delay | 70ms (min) after VOUT regulation - provides adequate timing margin for system-level power-on reset coordination in notebooks and PDAs. |
| Input Voltage Range | +1.62V to +3.6V - supports direct connection to partially discharged Li-ion (≥3.0V) or dual-cell NiMH (≥2.4V) sources. |
| Ground Current | 90µA typical at 300mA - maintains ultra-low quiescent consumption even under heavy load, critical for standby power budgeting. |
| PSRR | 70dB @ f < 1kHz - suppresses low-frequency ripple from switching converters or noisy DC-DC stages feeding the LDO input. |
Pinout & Package
MAX1976ETT300 is housed in a 6-pin 3mm × 3mm thin DFN package (pkg code T633-2), with exposed paddle (EP) soldered to PCB ground for thermal dissipation. Package height is <0.8mm, suitable for ultra-thin portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 1.62V–3.6V supply; requires ≥1µF ceramic bypass to GND for stability and noise rejection. |
| 2 (GND) | Ground Reference | Signal and power return; connects to EP for enhanced thermal performance in high-power operation. |
| 3 (SHDN) | Active-Low Shutdown Control | Logic-low input reduces supply current to <1µA; internal 1.5kΩ pull-down disconnects OUT from IN during shutdown. |
| 4 (RESET) | Open-Drain Reset Flag | Asserts low when VOUT < 82.5% of 3.0V; rises after ≥70ms delay post-regulation; requires external pull-up for µP interface. |
| 5 (I.C.) | Internally Connected | No external connection required; leave floating or tie to GND per layout best practices. |
| 6 (OUT) | Regulated Output | Delivers 3.0V/300mA; requires 4.7µF low-ESR ceramic capacitor to GND for transient response and stability. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | 0.33Ω RDS(ON) enables 100mV dropout at 300mA and eliminates base-drive current loss seen in PNP-based LDOs. |
| Thermal-overload protection | Shuts down at +165°C junction temperature with 15°C hysteresis, preventing permanent damage during sustained overload or poor heatsinking. |
| Logic-controlled shutdown | Reduces total supply current to <1µA while actively pulling OUT to GND via internal 1.5kΩ resistor - simplifies system power sequencing. |
| Reset threshold accuracy | 82.5% of VOUT ±2.5% (80–85%) ensures robust brownout detection across temperature and process variation. |
| Low-noise operation | 86µVRMS output noise (10Hz–100kHz) minimizes interference in analog/RF subsystems powered from this rail. |
Applications
| Notebook Computers | Digital Cameras |
|---|---|
Use Scenario: Powering image sensor I/O, ISP core, or SD card interface in compact clamshell designs. IC Role / Device Role / Timing Role: Primary 3.0V LDO supplying regulated voltage to mixed-signal blocks with tight noise and transient requirements. Use Value: 100mV dropout extends runtime from single-cell Li-ion batteries; 70ms RESET ensures clean boot sequence before sensor initialization. |
Use Scenario: Supplying CMOS image sensor analog front-end and flash controller in consumer-grade still/video cameras. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO delivering stable 3.0V rail during burst capture and LED flash activation. Use Value: 86µVRMS noise prevents image banding; thermal protection avoids shutdown during extended video recording. |
| Cellular Telephones | PCMCIA Cards |
Use Scenario: Regulating auxiliary 3.0V rail for Bluetooth/Wi-Fi coexistence modules or audio codecs in slim smartphones. IC Role / Device Role / Timing Role: Secondary LDO decoupling RF/analog sections from noisy main PMIC outputs. Use Value: 70dB PSRR at low frequencies rejects coupling from GSM/GPRS transmit bursts; 1.62V min input supports deep discharge tolerance. |
Use Scenario: Providing isolated 3.0V supply to PCMCIA Type II cards in industrial handheld terminals or legacy docking stations. IC Role / Device Role / Timing Role: Standalone LDO with integrated RESET for hot-plug detection and safe card enumeration. Use Value: Active-low open-drain RESET signals host controller within 70ms of valid VOUT, meeting PCMCIA 2.1 timing compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1963ETT300 | Same pinout and footprint; 2.2ms RESET delay instead of 70ms; identical electrical specs except reset timing. | Suitable where faster reset assertion is required (e.g., real-time MCU boot with minimal latency). | Select MAX1963ETT300 only if system timing allows shorter reset hold time; otherwise MAX1976ETT300 ensures robust power-on sequencing. |
| Torex XC6206P302MR-G | 300mA max output, 3.0V fixed, but no RESET output; dropout 350mV @ 300mA; SOT-23-5 package (no SHDN/RESET pins). | Lacks integrated reset supervision and shutdown control - requires external discrete circuitry for those functions. | Choose only when RESET and SHDN are unnecessary and board space permits larger dropout margin; not drop-in compatible. |
Compared with MAX1963ETT300, the MAX1976ETT300 provides longer reset assertion for safer microprocessor initialization, while the XC6206P302MR-G offers lower cost but sacrifices supervision features and requires higher input headroom.
Availability
MAX1976ETT300 is available at Aetrix Electronics and suitable for notebook computers, digital cameras, and cellular telephones requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1976ETT300 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 solutions for industrial, automotive, and portable applications.
The MAX1963/MAX1976 product line was engineered for ultra-low-input-voltage, high-accuracy LDO regulation in battery-powered portable equipment - emphasizing minimal dropout, guaranteed current delivery, and integrated power-supervision functionality.
FAQ
What is the exact output voltage and accuracy of the MAX1976ETT300?
The MAX1976ETT300 delivers a factory-trimmed fixed output voltage of 3.0V with ±0.5% accuracy over load (1mA–300mA), line (VIN = VOUT + 0.5V to +3.6V), and temperature (−40°C to +85°C). This specification is guaranteed by design across the full operating range and confirmed in the datasheet's Electrical Characteristics table.
Does the MAX1976ETT300 require external resistors to set the output voltage?
No, the MAX1976ETT300 does not require external resistors. Its 3.0V output is internally trimmed and fixed at wafer level, eliminating feedback components and reducing bill-of-materials count. The "300" suffix in the part number explicitly denotes the 3.0V variant per Maxim's Selector Guide.
What is the function and timing behavior of the RESET pin on the MAX1976ETT300?
The RESET pin on the MAX1976ETT300 is an active-low, open-drain output that asserts low when VOUT drops below 82.5% of 3.0V and remains asserted for at least 70ms after VOUT rises above regulation. It requires an external pull-up resistor and interfaces directly with microprocessor reset inputs for reliable power-on sequencing.
Can the MAX1976ETT300 operate from a single-cell lithium-ion battery?
Yes, the MAX1976ETT300 operates from 1.62V to 3.6V, making it compatible with single-cell Li-ion batteries (nominal 3.7V, end-of-discharge ~3.0V). With only 100mV dropout at 300mA, it sustains 3.0V output until battery voltage falls to 3.1V - maximizing usable capacity in portable systems.
What thermal protection mechanism does the MAX1976ETT300 implement?
The MAX1976ETT300 incorporates thermal-overload protection that disables the pass transistor when junction temperature exceeds +165°C. After cooling by 15°C, the device automatically resumes regulation. This pulsed operation prevents permanent damage during sustained overload or inadequate PCB heatsinking.
MAX1976ETT300 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 3.6V
- Voltage - Output (Min/Fixed):
- 3V
- 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:
- 6-TDFN-EP (3x3)
MAX1976ETT300 FAQ
1.How can I place an order for MAX1976ETT300 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1976ETT300 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 MAX1976ETT300 reliable?
The price and inventory of MAX1976ETT300 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1976ETT300 is usually 5 days.
3.What payment methods are accepted for MAX1976ETT300?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1976ETT300 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1976ETT300?
MAX1976ETT300 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1976ETT300 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 MAX1976ETT300?
For technical support, including MAX1976ETT300 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1976ETT300 requirements.
6.How does Aetrix verify that MAX1976ETT300 is sourced from the original manufacturer or authorized distributors?
All MAX1976ETT300 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 MAX1976ETT300 meets industry standards.
7.What is the process for return or replacement of MAX1976ETT300?
All MAX1976ETT300 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1976ETT300, 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 MAX1976ETT300 part is unused and in its original packaging.
Return procedure for MAX1976ETT300:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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