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Analog Devices Inc./Maxim Integrated MAX1976EZT110+T
- Part No.:
- MAX1976EZT110+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MAX1976EZT110+T.pdf
- Description:
- IC REG LINEAR 300MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
The MAX1976EZT110+T from Maxim Integrated is a low-dropout linear regulator delivering 300mA continuous output current with ±0.5% output voltage accuracy, 100mV dropout at full load, and a fixed 1.10V output voltage. It operates from a 1.62V–3.6V input supply and features an active-low open-drain RESET output with 70ms delay, making it suitable for power sequencing in portable battery-powered systems such as notebook computers and handheld devices.
For engineers reviewing the MAX1976EZT110+T datasheet, MAX1976EZT110+T pinout, MAX1976EZT110+T application, or MAX1976EZT110+T equivalent, key selection criteria include guaranteed 300mA load capability under low-input-voltage conditions (≥1.62V), precise 1.10V output tolerance, thermal-overload and short-circuit protection, and compatibility with standard 6-pin thin SOT23 PCB footprints.
Technical Context
The MAX1976EZT110+T integrates a P-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) enabling low quiescent current (90µA typ) independent of load and dropout voltage. Its internal feedback network sets a fixed 1.10V output without external resistors, and its power-good comparator drives an open-drain RESET output that asserts when VOUT falls below 82.5% of nominal and remains asserted for ≥70ms after regulation is achieved.
Designed for battery-powered applications, the device includes logic-controlled shutdown (ISHDN ≤ 5nA at +85°C), undervoltage lockout (VUVLO = 1.30–1.60V), and thermal shutdown at +165°C with 15°C hysteresis. The 6-pin thin SOT23 package (Z6-1/Z6+1) supports compact layouts while maintaining thermal performance via GND pin and exposed pad (in TDFN variants) - though this specific variant uses only the SOT23 footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.10V ±0.5% over load/line/temp - eliminates need for external feedback resistors and ensures stable core voltage for low-power microcontrollers. |
| Max Output Current | 300mA continuous - sufficient to power baseband processors, RF transceivers, or memory subsystems in portable electronics. |
| Dropout Voltage | 100mV at 300mA load - enables operation down to 1.21V input, extending usable battery life in single-cell Li-ion or Li-poly systems. |
| Input Voltage Range | 1.62V to 3.6V - compatible with partially discharged batteries and multi-rail power domains in space-constrained designs. |
| RESET Delay | 70ms (min) after VOUT reaches regulation - provides reliable power-on reset timing for embedded microcontrollers without external RC networks. |
| Quiescent Current | 90µA typical at full load - maintains ultra-low standby power even during heavy output current, critical for always-on system functions. |
| Shutdown Current | ≤1µA at +85°C - ensures minimal battery drain during deep-sleep modes in portable equipment. |
Pinout & Package
MAX1976EZT110+T is housed in a RoHS-compliant 6-pin thin SOT23 package (Z6+1), measuring 2.9mm × 1.6mm × 1.1mm max height, with GND-connected thermal pad on the bottom surface for enhanced heat dissipation. Pin 1 is marked by a dot or bevelled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 1.62V–3.6V supply; requires ≥1µF ceramic bypass capacitor to GND for stability and noise suppression. |
| 2 (GND) | Ground Reference & Thermal Path | Primary ground return and thermal conduction path; must connect to large PCB copper area for thermal management. |
| 3 (SHDN) | Active-Low Shutdown Control | Logic-low (<0.6V) disables regulator and reduces supply current to <1µA; pulled high internally when unused. |
| 4 (RESET) | Open-Drain Reset Flag | Asserts low when VOUT drops below 82.5% of 1.10V; releases high ≥70ms after VOUT stabilizes - directly interfaces with µP reset inputs. |
| 5 (I.C.) | Internally Connected | No external connection required; leave floating or tie to GND per layout best practices. |
| 6 (OUT) | Regulated Output | Delivers up to 300mA at 1.10V; requires ≥4.7µF low-ESR ceramic capacitor to GND for transient response and PSRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss, enabling 90µA quiescent current independent of load and dropout - ideal for battery runtime extension. |
| Fixed 1.10V output with ±0.5% accuracy | Guaranteed across -40°C to +85°C, 1mA–300mA load, and 1.62V–3.6V input - ensures reliable operation of 1.1V-core digital ICs without calibration. |
| 70ms RESET assertion delay | Provides deterministic power-on reset timing for microcontrollers, eliminating need for external reset ICs or RC timing circuits. |
| Thermal-overload and short-circuit protection | Shuts down pass transistor at +165°C junction temperature and cycles output during sustained overload - prevents permanent damage in fault conditions. |
| Logic-compatible shutdown input | Accepts standard CMOS logic levels (VIH ≥1.4V, VIL ≤0.6V) and draws ≤5nA bias current - compatible with low-power GPIOs without level-shifting. |
Applications
| Smartphone Baseband Power | Notebook CPU Core Supply |
|---|---|
|
Use Scenario: Powers ARM-based application processors or modem subsystems requiring stable 1.10V at up to 300mA in smartphones with tight board space. IC Role / Device Role / Timing Role: Primary LDO for core voltage rail, providing clean, regulated 1.10V with fast transient response and integrated power-good signaling. Use Value: Enables direct use of single-cell Li-ion (2.8V–4.2V) or boosted 3.3V rails while maintaining >100mV headroom down to 1.21V input - extends usable battery capacity. |
Use Scenario: Supplies low-voltage I/O or auxiliary logic blocks in ultraportable notebooks where space and thermal budget are constrained. IC Role / Device Role / Timing Role: Secondary LDO generating 1.10V from main 3.3V or 5V system rail, with RESET output synchronized to power-up sequencing. Use Value: Replaces discrete reset circuitry and saves PCB area versus larger packages; 70ms RESET delay aligns with BIOS initialization timing requirements. |
| Digital Camera Image Sensor Bias | Wearable Health Monitor SoC |
|
Use Scenario: Provides quiet 1.10V bias for CMOS image sensor analog front-end circuits in compact digital cameras. IC Role / Device Role / Timing Role: Low-noise LDO with 86µVRMS output noise and 70dB PSRR at 1kHz - minimizes sensor readout artifacts. Use Value: Delivers stable voltage during burst capture mode (300mA peak) without droop, while 100mV dropout preserves headroom during battery sag. |
Use Scenario: Powers ultra-low-power Bluetooth LE SoCs and biometric sensors in wrist-worn health monitors operating from coin-cell or small Li-poly batteries. IC Role / Device Role / Timing Role: Main system regulator with shutdown control linked to motion-detection wake events and RESET tied to firmware boot validation. Use Value: 90µA quiescent current and sub-1µA shutdown current maximize battery life; 1.62V minimum input supports operation down to near end-of-life battery voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0511PDBVR | Fixed 1.1V output, 200mA max, 170mV dropout at 200mA, 1.4V min input, 25µA IQ | Lower current rating and higher dropout limit device use in lower-power wearables or sensor nodes only. | Select when 200mA suffices and ultra-low IQ (25µA) outweighs need for 300mA headroom. |
| MCP1826-1102E/DB | Fixed 1.1V output, 300mA max, 350mV dropout at 300mA, 2.3V min input, 120µA IQ | Higher minimum input voltage restricts use to systems with ≥2.3V supply rails, excluding single-cell Li-ion below 2.3V. | Choose when board-level thermal design accommodates higher dropout and input supply is ≥2.3V (e.g., 3.3V intermediate rail). |
Compared with TPS7A0511PDBVR and MCP1826-1102E/DB, the MAX1976EZT110+T uniquely supports 300mA delivery from as low as 1.62V input with only 100mV dropout - enabling longer runtime in single-cell battery systems where input voltage sags below 2.3V.
Availability
MAX1976EZT110+T is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, and personal digital assistants requiring stable component supply with guaranteed 1.10V output accuracy and integrated power-on reset functionality.
Supply support for MAX1976EZT110+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 MAX1963/MAX1976 product line delivers low-input-voltage, high-accuracy LDOs with integrated RESET for space-constrained battery-powered systems - targeting applications where input voltage may dip near 1.6V and precise power sequencing is essential.
FAQ
What is the output voltage tolerance of the MAX1976EZT110+T over temperature and load?
The MAX1976EZT110+T guarantees ±0.5% output voltage accuracy across -40°C to +85°C ambient temperature, 1mA to 300mA load current, and 1.62V to 3.6V input voltage. This specification is verified in production testing and reflects the trimmed internal reference and error amplifier performance - ensuring reliable 1.10V operation for sensitive digital loads without external calibration.
Does the MAX1976EZT110+T require external capacitors, and what values are recommended?
Yes, the MAX1976EZT110+T 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 across the full operating range and support transient response for 300mA load steps. Using capacitors outside these recommendations - especially higher ESR or smaller values - may cause oscillation or degraded PSRR performance in the MAX1976EZT110+T.
How does the RESET output of the MAX1976EZT110+T behave during power-up and brownout?
The RESET output of the MAX1976EZT110+T is an active-low open-drain signal that remains asserted (low) until the output voltage reaches ≥82.5% of 1.10V and stays regulated for ≥70ms. If VOUT drops below that threshold during operation - due to input sag or overload - RESET immediately pulls low again. This behavior ensures robust microprocessor reset signaling during both startup and brownout events in the MAX1976EZT110+T.
Can the MAX1976EZT110+T be used in place of the MAX1963EZT110+T?
No - although pin-compatible and functionally similar, the MAX1976EZT110+T has a 70ms RESET delay versus the MAX1963EZT110+T's 2.2ms delay. Substituting them without verifying system reset timing requirements may cause boot failures or firmware initialization errors. The MAX1976EZT110+T is not a drop-in replacement for the MAX1963EZT110+T in time-critical reset applications.
What thermal considerations apply to the MAX1976EZT110+T in the thin SOT23 package?
In the thin SOT23 package, the MAX1976EZT110+T relies on PCB copper area connected to Pin 2 (GND) for heat dissipation. At +70°C ambient, its maximum power dissipation is 727mW, limiting sustainable 300mA operation to VIN–VOUT ≤ 2.4V. For higher differentials or continuous 300mA loads, thermal derating or forced airflow is required - unlike the TDFN variant, which supports higher power due to its exposed paddle.
MAX1976EZT110+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:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 3.6V
- Voltage - Output (Min/Fixed):
- 1.1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.2V @ 300mA
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
MAX1976EZT110+T FAQ
1.How can I place an order for MAX1976EZT110+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1976EZT110+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 MAX1976EZT110+T reliable?
The price and inventory of MAX1976EZT110+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1976EZT110+T is usually 5 days.
3.What payment methods are accepted for MAX1976EZT110+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1976EZT110+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1976EZT110+T?
MAX1976EZT110+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1976EZT110+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 MAX1976EZT110+T?
For technical support, including MAX1976EZT110+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1976EZT110+T requirements.
6.How does Aetrix verify that MAX1976EZT110+T is sourced from the original manufacturer or authorized distributors?
All MAX1976EZT110+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 MAX1976EZT110+T meets industry standards.
7.What is the process for return or replacement of MAX1976EZT110+T?
All MAX1976EZT110+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1976EZT110+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 MAX1976EZT110+T part is unused and in its original packaging.
Return procedure for MAX1976EZT110+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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