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Analog Devices Inc./Maxim Integrated MAX1976EZT110+
- Part No.:
- MAX1976EZT110+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MAX1976EZT110+.pdf
- Description:
- IC REG LINEAR 300MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:845
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Product details
Overview
MAX1976EZT110+ from Maxim Integrated is a low-dropout linear regulator (LDO) delivering 300mA continuous output current with 100mV dropout at full load, preset to 1.10V output voltage, and featuring an active-low open-drain RESET output with 70ms delay. It operates from 1.62V to 3.6V input and is optimized for space-constrained, battery-powered systems such as notebook computers and cellular handsets.
For engineers reviewing the MAX1976EZT110+ datasheet, MAX1976EZT110+ pinout, MAX1976EZT110+ application, or MAX1976EZT110+ equivalent, key selection criteria include guaranteed 300mA output under low-input-voltage conditions (≥1.62V), ±0.5% output accuracy over load/line/temperature, thermal and short-circuit protection, and compatibility with 1µF input / 4.7µF output ceramic capacitors for stable operation.
Technical Context
The MAX1976EZT110+ employs an internal P-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) enabling supply current independence from load and dropout voltage - critical for battery runtime consistency. Its error amplifier compares a trimmed bandgap reference against feedback from the internally set 1.10V output, driving the pass gate to maintain regulation.
RESET functionality is implemented via a dedicated comparator monitoring VOUT; it asserts low when output falls below 82.5% of nominal (±2.5% threshold accuracy) and remains asserted for ≥70ms after recovery. Shutdown is logic-controlled (active-low SHDN), reducing quiescent current to <1µA while pulling OUT to GND via a 1.5kΩ internal resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.10V (factory-trimmed, no external resistors required) |
| Max Output Current | 300mA continuous (guaranteed across -40°C to +85°C) |
| Dropout Voltage | 100mV at 300mA load (enables operation down to VIN = 1.20V for 1.10V output) |
| Output Accuracy | ±0.5% at TA = +25°C; ±2.5% over full load/line/temp range |
| RESET Delay | 70ms minimum after VOUT reaches regulation (MAX1976-specific timing) |
| Quiescent Current | 90µA typical at 300mA load and in dropout (enables low-noise, high-efficiency operation) |
| Input Voltage Range | 1.62V to 3.6V (supports single-cell Li-ion, Li-poly, and multi-cell alkaline/NiMH) |
Pinout & Package
MAX1976EZT110+ is packaged in a RoHS-compliant 6-pin thin SOT23-6 (package code Z6+1), height <1.1mm, footprint 2.9mm × 1.6mm. Pin 1 is IN; Pin 2 is GND; Pin 3 is SHDN; Pin 4 is RESET; Pin 5 is I.C. (internally connected, leave floating or tie to GND); Pin 6 is OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input supply | Accepts 1.62V–3.6V; requires ≥1µF ceramic bypass to GND for stability |
| 2 (GND) | Power and signal ground | Serves as thermal path; must connect to large PCB copper area for power dissipation |
| 3 (SHDN) | Active-low shutdown control | Logic low (<0.6V) disables regulator and reduces IQ to <1µA |
| 4 (RESET) | Open-drain reset flag output | Asserts low during power-up/brownout; rises 70ms after VOUT stabilizes |
| 5 (I.C.) | Internally connected node | No external connection required; may be left floating or tied to GND |
| 6 (OUT) | Regulated output | Delivers up to 300mA; requires 4.7µF low-ESR ceramic capacitor to GND |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss; enables constant 90µA IQ regardless of load or dropout |
| Factory-trimmed 1.10V output | Removes need for external feedback resistors; saves board space and BOM cost |
| 70ms RESET assertion delay | Ensures reliable microprocessor reset timing for MAX1976-series applications |
| Thermal shutdown with 15°C hysteresis | Prevents permanent damage during overload; enables self-recovering pulsed operation |
| Low-ESR capacitor compatibility | Stable with ≤30mΩ output capacitor ESR - supports widely available ceramic types |
Applications
| Notebook Computers | Cellular Telephones |
|---|---|
Use Scenario: Powering core logic voltage rails (e.g., SoC I/O, memory interface) in ultra-thin clamshell notebooks with tight thermal envelopes. IC Role / Device Role / Timing Role: Primary 1.10V LDO supplying processor subsystems requiring precise, low-noise voltage with fast transient response. Use Value: 100mV dropout extends usable battery life by enabling operation until VIN drops to 1.20V; ±0.5% accuracy ensures compliance with JEDEC DDR I/O specs. | Use Scenario: Supplying application processor I/O banks in 4G/LTE smartphones where input voltage varies from 3.4V (full charge) to 2.8V (discharge). IC Role / Device Role / Timing Role: Secondary LDO generating stable 1.10V for high-speed serial interfaces (e.g., MIPI D-PHY, SDIO) sensitive to supply ripple. Use Value: 70ms RESET guarantees clean boot sequencing after cold start or brownout; PSRR >70dB @1kHz suppresses switching noise from PMIC DC-DC stages. |
| Personal Digital Assistants (PDAs) | Digital Cameras |
Use Scenario: Regulating voltage for ARM-based application processors and touch controller ICs in legacy handheld PDAs with single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Main system LDO providing 1.10V to CPU core and peripheral domains with integrated power-good signaling. Use Value: Logic-controlled SHDN enables rapid system sleep/wake transitions; <1µA shutdown current minimizes standby drain. | Use Scenario: Powering image signal processor (ISP) I/O and sensor interface circuitry in compact digital still cameras with burst-mode operation. IC Role / Device Role / Timing Role: Dedicated LDO delivering low-noise 1.10V to high-speed parallel camera buses (e.g., CCP, SLIMbus) requiring minimal supply-induced jitter. Use Value: 86µVRMS output noise (10Hz–100kHz) prevents analog signal corruption; 20mV load-transient response (20mA→200mA) maintains ISP clock integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1963EZT110+ | Same package and pinout; RESET delay = 2.2ms (vs. 70ms) | Targeted at systems requiring faster reset assertion (e.g., real-time microcontrollers) | Select MAX1963EZT110+ only if shorter reset timeout is required; not drop-in compatible due to timing divergence. |
| Torex XC6219B112MR-G | 1.1V output, 300mA, SOT-25 package (5-pin); no RESET output | Lacks integrated reset function; requires external supervisor IC for power sequencing | Choose when RESET is unnecessary and board space permits separate supervision; lower cost but higher total solution complexity. |
Compared with MAX1963EZT110+, the MAX1976EZT110+ provides longer reset hold time for robust boot reliability, while the XC6219B112MR-G offers cost savings at the expense of missing integrated reset - requiring additional components and PCB area for equivalent functionality.
Availability
MAX1976EZT110+ is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, and personal digital assistants requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for MAX1976EZT110+ 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, computing, and communications applications.
The MAX1963/MAX1976 product line delivers low-input-voltage, high-accuracy LDOs with integrated RESET for portable battery-powered equipment - emphasizing minimal dropout, ultra-low quiescent current, and small-footprint packaging.
FAQ
What is the exact output voltage of the MAX1976EZT110+?
The MAX1976EZT110+ has a factory-trimmed, fixed output voltage of 1.10V. This value is laser-adjusted during production and does not require external resistors. The device maintains ±0.5% accuracy at +25°C and ±2.5% over the full operating temperature range (-40°C to +85°C), as specified in the Electrical Characteristics table of the MAX1976 datasheet. No configuration or external components are needed to achieve this output.
Does the MAX1976EZT110+ require external capacitors, and what values are recommended?
Yes, the MAX1976EZT110+ requires two external ceramic capacitors for stable operation: a 1µF capacitor between IN and GND, and a 4.7µF low-ESR ceramic capacitor between OUT and GND. These values are validated across temperature and load conditions per the datasheet. Using capacitors with ESR ≤30mΩ ensures stability and optimal transient response. Placement must be adjacent to the IC pins to minimize trace inductance - deviation risks oscillation or degraded load-step performance.
How does the RESET output of the MAX1976EZT110+ behave during power-up and fault conditions?
The RESET output of the MAX1976EZT110+ is an active-low, open-drain signal that remains asserted (low) until the output voltage reaches regulation and stays within tolerance. After VOUT stabilizes, RESET deasserts after a guaranteed minimum delay of 70ms. If VOUT drops below 82.5% of nominal (e.g., due to overload or input collapse), RESET immediately reasserts. During SHDN activation, RESET is also actively pulled low - ensuring deterministic reset behavior across all failure modes.
Is the MAX1976EZT110+ pin-compatible with other devices in the MAX1963/MAX1976 family?
Yes, the MAX1976EZT110+ shares identical pinout and package (6-pin thin SOT23-6) with all MAX1963 and MAX1976 variants, including MAX1963EZT110+. However, functional differences exist - notably the RESET delay (70ms for MAX1976 vs. 2.2ms for MAX1963). While PCB layout is interchangeable, direct substitution without firmware or timing validation is not recommended due to this critical timing divergence in power-on reset sequencing.
What thermal protection features does the MAX1976EZT110+ include, and how do they operate?
The MAX1976EZT110+ integrates thermal-overload protection that disables the pass transistor when junction temperature exceeds +165°C. Once triggered, the device remains off until the die cools by 15°C (hysteresis), then resumes regulation - resulting in pulsed output under sustained overload. This safeguard prevents permanent damage during soldering faults, excessive ambient temperature, or inadequate heatsinking. The exposed pad in TDFN variants enhances thermal conduction, but the MAX1976EZT110+ (SOT23) relies on PCB copper area connected to Pin 2 (GND) for effective heat dissipation.
MAX1976EZT110+ 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):
- -
- 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
MAX1976EZT110+ FAQ
1.How can I place an order for MAX1976EZT110+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1976EZT110+ 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+ reliable?
The price and inventory of MAX1976EZT110+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1976EZT110+ is usually 5 days.
3.What payment methods are accepted for MAX1976EZT110+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1976EZT110+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1976EZT110+?
MAX1976EZT110+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1976EZT110+ 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+?
For technical support, including MAX1976EZT110+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1976EZT110+ requirements.
6.How does Aetrix verify that MAX1976EZT110+ is sourced from the original manufacturer or authorized distributors?
All MAX1976EZT110+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX1976EZT110+?
All MAX1976EZT110+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1976EZT110+, 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+ part is unused and in its original packaging.
Return procedure for MAX1976EZT110+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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