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Analog Devices Inc./Maxim Integrated MAX1976AEZT120-T
- Part No.:
- MAX1976AEZT120-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MAX1976AEZT120-T.pdf
- Description:
- IC REG LINEAR 300MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:9,701
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Product details
Overview
MAX1976AEZT120-T from Maxim Integrated is a low-dropout linear regulator with preset 1.20V output, delivering guaranteed 300mA continuous current from a +1.62V to +3.6V input supply while maintaining only 100mV dropout at full load. It features an active-low open-drain RESET output with 70ms delay after regulation and operates across -40°C to +85°C in a 6-pin thin SOT23 package. It is used in portable battery-powered systems requiring stable low-voltage rail generation and power-good supervision.
For engineers reviewing the MAX1976AEZT120-T datasheet, MAX1976AEZT120-T pinout, MAX1976AEZT120-T application, or MAX1976AEZT120-T equivalent, key selection considerations include its 1.20V fixed output, ±0.5% initial accuracy, 70ms RESET assertion time, thermal-overload protection, and compatibility with 1µF input / 4.7µF output ceramic capacitors for stable operation in handheld and embedded power rails.
Technical Context
The MAX1976AEZT120-T employs an internal p-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) enabling low quiescent current independent of load and dropout voltage. Its error amplifier compares a trimmed bandgap reference against internal feedback to regulate output with ±0.5% initial accuracy over temperature, line, and load.
It integrates a dedicated reset comparator monitoring VOUT against 82.5% of nominal voltage, asserting RESET low during undervoltage, shutdown, or brownout - with guaranteed 70ms minimum delay before release after regulation. Thermal shutdown activates at +165°C with 15°C hysteresis, and logic-controlled shutdown reduces supply current below 1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.20V - internally trimmed; no external resistors required for regulation. |
| Max Output Current | 300mA continuous - supports moderate-power digital ICs and RF sections without derating at typical ambient temperatures. |
| Dropout Voltage | 100mV at 300mA - enables operation down to ~1.3V input for 1.2V rail, extending battery life in single-cell Li-ion or Li-poly systems. |
| Output Accuracy | ±0.5% at +25°C - ensures tight tolerance for core voltage supplies of modern low-voltage processors and memory. |
| RESET Delay | 70ms (min) - provides sufficient hold-off for microcontroller initialization and firmware boot sequences. |
| Quiescent Current | 90µA typical at 300mA load - remains constant across dropout, critical for standby power budgeting in always-on subsystems. |
| Input Voltage Range | +1.62V to +3.6V - compatible with single-cell Li-ion (2.7–4.2V), LiFePO4, and regulated 1.8V/2.5V/3.3V intermediate rails. |
Pinout & Package
Package: 6-pin thin SOT23-6 (1.6mm × 2.9mm × 1.1mm height), thermally enhanced with GND as heatsink pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Regulator input | Accepts +1.62V to +3.6V; requires ≥1µF ceramic bypass to GND close to pin for stability and noise rejection. |
| 2 - GND | Power and thermal ground | Serves as primary return path and heatsink; must be soldered to large PCB copper area for thermal management. |
| 3 - SHDN | Active-low shutdown control | Pull low to disable output, reduce IQ to <1µA, and actively pull RESET low; high-impedance when floating or tied to IN. |
| 4 - RESET | Open-drain reset flag | Asserts low when VOUT < 82.5% of 1.20V; rises 70ms after VOUT reaches regulation; requires external pull-up. |
| 5 - I.C. | Internally connected | No functional connection; leave floating or tie to GND per layout best practice; not a signal or power pin. |
| 6 - OUT | Regulated output | Delivers up to 300mA at 1.20V; requires ≥4.7µF low-ESR ceramic capacitor to GND for transient response and PSRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| pMOS pass transistor | RDS(ON) = 0.33Ω eliminates base-drive current, enabling stable 90µA quiescent current even in dropout. |
| 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 system standby current to sub-µA level, supporting ultra-low-power sleep modes in portable devices. |
| Reset threshold accuracy | 82.5% of VOUT ±2.5% ensures reliable detection of brownout conditions without false triggering near nominal regulation. |
| Low ESR capacitor support | Stable with ≤30mΩ output capacitor ESR, enabling use of compact, high-performance X5R/X7R ceramics instead of bulkier tantalum or electrolytic types. |
Applications
| Smartphone Application Processor Core Supply | Wearable Sensor Hub Power Rail |
|---|---|
Use Scenario: Powers ARM Cortex-A/M series application processor cores requiring tightly regulated 1.20V at up to 300mA peak current during burst-mode operation. IC Role / Device Role / Timing Role: Primary LDO regulator providing clean, low-noise 1.20V core voltage with integrated RESET supervision for safe boot and brownout recovery. Use Value: 100mV dropout extends usable battery range by ~150mV compared to higher-dropout alternatives, directly increasing talk-time in single-cell Li-ion designs. | Use Scenario: Supplies 1.20V to ultra-low-power sensor fusion hubs (e.g., accelerometer + gyroscope + MCU) in hearables and fitness trackers. IC Role / Device Role / Timing Role: Always-on power source with sub-1µA shutdown current and precise 70ms RESET timing to coordinate wake-up sequencing and firmware validation. Use Value: ±0.5% output accuracy maintains sensor ADC reference stability, reducing calibration drift and improving motion data fidelity over temperature. |
| PCMCIA Card Interface Voltage | Digital Still Camera Image Signal Processor (ISP) Bias |
Use Scenario: Generates 1.20V for PCMCIA/CardBus interface logic and controller I/O buffers in legacy industrial handheld terminals. IC Role / Device Role / Timing Role: Compact, SOT23-packaged LDO with integrated RESET ensuring compliant power-up timing per PCMCIA specification. Use Value: 6-pin SOT23 footprint minimizes board area versus larger packages, while 70ms RESET meets minimum assertion time requirements for host controller handshaking. | Use Scenario: Provides 1.20V bias to image signal processors and CIS analog front-ends in compact DSC modules where space and thermal headroom are constrained. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO delivering stable rail during rapid ISP clock transitions and pixel readout bursts. Use Value: 86µVRMS output noise and 70dB PSRR at 1kHz suppress switching artifacts from nearby DC-DC converters, preserving image SNR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0512PDBVR | 1.2V fixed output, 200mA max, 170mV dropout at 200mA, 25µA IQ, SOT23-5 package (no RESET) | Lacks RESET output and thermal shutdown; lower current rating limits use in burst-load scenarios. | Select when RESET supervision is handled externally and peak load stays ≤200mA. |
| MCP1825-1202E/DB | 1.2V fixed output, 500mA max, 230mV dropout at 500mA, 85µA IQ, SOT23-5 (no RESET) | Higher current capability but larger dropout; no integrated RESET or thermal protection. | Choose for higher-current needs where external reset circuitry is acceptable and thermal margin is assured. |
Compared with TPS7A0512PDBVR and MCP1825-1202E/DB, the MAX1976AEZT120-T uniquely combines 300mA delivery, 100mV dropout, integrated 70ms RESET, and thermal shutdown in a 6-pin SOT23 - making it optimal for space-constrained, safety-critical battery-powered systems requiring autonomous power-good supervision.
Availability
MAX1976AEZT120-T is available at Aetrix Electronics and suitable for smartphone core supplies, wearable sensor hubs, PCMCIA interfaces, and digital still camera ISPs requiring stable component supply with long-term lifecycle assurance.
Supply support for MAX1976AEZT120-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, mixed-signal, and power management ICs for demanding industrial, automotive, and portable applications.
The MAX1963A/MAX1976A product line delivers low-input-voltage, high-accuracy LDOs with integrated RESET for battery-powered equipment where minimal dropout, tight regulation, and autonomous power supervision are essential.
FAQ
What is the exact output voltage of the MAX1976AEZT120-T?
The MAX1976AEZT120-T has a factory-trimmed fixed output voltage of 1.20V. This value is specified in the Selector Guide and confirmed in the Electrical Characteristics table under "Output Voltage Accuracy" with test conditions referencing VOUT = 1.20V. The suffix "120" in the part number explicitly denotes the 1.20V variant.
Does the MAX1976AEZT120-T require external resistors to set its output voltage?
No, the MAX1976AEZT120-T does not require external resistors. Its 1.20V output is internally trimmed and fixed; the device uses an internal feedback divider network. External components are limited to input/output bypass capacitors (1µF and 4.7µF ceramic) and an external pull-up resistor on the RESET pin.
What is the function of the I.C. pin on the MAX1976AEZT120-T?
The I.C. pin (Pin 5) on the MAX1976AEZT120-T is internally connected but not functionally assigned. As stated in the Pin Description table, it should be left floating or tied to GND for mechanical stability - it carries no signal, power, or control function and must not be used as a current path or voltage reference.
How does the RESET output behave during shutdown of the MAX1976AEZT120-T?
When SHDN is pulled low, the MAX1976AEZT120-T enters shutdown mode and actively pulls the RESET pin low. This behavior is documented in the Detailed Description section: "During shutdown… RESET is actively pulled low." The RESET pin remains asserted low until SHDN is returned high and VOUT re-establishes regulation, after which the 70ms delay timer begins.
Can the MAX1976AEZT120-T operate from a 1.5V input supply?
Yes, the MAX1976AEZT120-T can operate from a 1.5V input supply, but only if the output load is light enough to maintain regulation. With a 1.20V output, the minimum input for regulation is VOUT + VDROPOUT. At 100mV dropout, 1.30V is theoretically sufficient; however, the Absolute Maximum Ratings specify a minimum input of 1.62V for guaranteed operation across temperature and process variation - so 1.5V falls below the recommended operating range and may result in marginal or non-compliant performance.
MAX1976AEZT120-T 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:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 3.6V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 140 µA
- Current - Supply (Max):
- 90 µA
- 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
MAX1976AEZT120-T FAQ
1.How can I place an order for MAX1976AEZT120-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1976AEZT120-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 MAX1976AEZT120-T reliable?
The price and inventory of MAX1976AEZT120-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1976AEZT120-T is usually 5 days.
3.What payment methods are accepted for MAX1976AEZT120-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1976AEZT120-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1976AEZT120-T?
MAX1976AEZT120-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1976AEZT120-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 MAX1976AEZT120-T?
For technical support, including MAX1976AEZT120-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1976AEZT120-T requirements.
6.How does Aetrix verify that MAX1976AEZT120-T is sourced from the original manufacturer or authorized distributors?
All MAX1976AEZT120-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 MAX1976AEZT120-T meets industry standards.
7.What is the process for return or replacement of MAX1976AEZT120-T?
All MAX1976AEZT120-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1976AEZT120-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 MAX1976AEZT120-T part is unused and in its original packaging.
Return procedure for MAX1976AEZT120-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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