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Analog Devices Inc./Maxim Integrated MAX1976EZT130+T
- Part No.:
- MAX1976EZT130+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MAX1976EZT130+T.pdf
- Description:
- IC REG LINEAR 300MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX1976EZT130+T from Maxim Integrated is a low-dropout linear regulator delivering 300mA continuous output current with 100mV dropout at full load, ±0.5% output voltage accuracy, and a fixed 1.30V output voltage. It operates from 1.62V to 3.6V input and integrates 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 cellular handsets.
For engineers reviewing the MAX1976EZT130+T datasheet, MAX1976EZT130+T pinout, MAX1976EZT130+T application, or MAX1976EZT130+T equivalent, key selection criteria include guaranteed 300mA load capability under low-input-voltage conditions (≥1.62V), precise 1.30V output tolerance, thermal-overload and short-circuit protection, and compatibility with compact 6-pin thin SOT23 packaging for space-constrained designs.
Technical Context
The MAX1976EZT130+T uses an internal P-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) enabling supply current independence from load and dropout voltage-critical for battery life in portable devices. Its error amplifier compares a trimmed bandgap reference against feedback from the internal voltage divider to regulate output.
RESET functionality is implemented via a dedicated comparator monitoring VOUT, asserting low when output falls below 82.5% of nominal (1.0725V) and holding for ≥70ms after regulation is achieved. Shutdown is logic-controlled via active-low SHDN, reducing quiescent current to <1µA while pulling OUT to GND through a 1.5kΩ resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.30V ±0.5% - ensures stable core or I/O rail for low-voltage microcontrollers without external feedback components. |
| Max Output Current | 300mA continuous - supports moderate-power digital subsystems including baseband processors and memory interfaces. |
| Dropout Voltage | 100mV at 300mA - enables operation down to 1.40V 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 PMIC outputs. |
| RESET Delay | 70ms (min) - provides sufficient power-rail stabilization time before releasing processor reset, meeting typical µP requirements. |
| Quiescent Current | 90µA typical at 300mA load - maintains efficiency across load range without sacrificing regulation accuracy. |
| Thermal Shutdown | +165°C with 15°C hysteresis - protects device during sustained overload or poor PCB heatsinking without latch-up. |
Pinout & Package
MAX1976EZT130+T is housed in a 6-pin thin SOT23 package (Z6-1 / Z6+1 variant), 2.9mm × 1.6mm × 0.8mm profile, with exposed pad not present. 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 | Accepts 1.62V–3.6V supply; requires ≥1µF ceramic bypass to GND for stability and noise suppression. |
| 2 (GND) | Ground reference and thermal path | Serves as primary return and heatsink; must connect to large copper area for thermal management in high-load operation. |
| 3 (SHDN) | Active-low shutdown control | Pulling low disables regulator, reduces IQ to <1µA, and forces RESET low; logic-high (≥1.4V) enables normal operation. |
| 4 (RESET) | Open-drain reset flag | Asserts low until VOUT reaches regulation, then remains low for ≥70ms before going high-impedance; requires external pull-up. |
| 5 (I.C.) | Internally connected node | No external connection required; may be left floating or tied to GND per layout best practices for noise immunity. |
| 6 (OUT) | Regulated output | Delivers up to 300mA at 1.30V; requires 4.7µF low-ESR ceramic capacitor to GND for transient response and PSRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Low-input-voltage operation | Starts regulation at 1.62V input - enables use with single-cell Li-ion batteries down to ~3.0V pack voltage. |
| P-channel MOSFET pass element | RDS(ON) = 0.33Ω - eliminates base-drive current loss, ensuring consistent 90µA quiescent current across load and dropout conditions. |
| Integrated RESET with programmable timing | 70ms delay (MAX1976) - matches common microprocessor power-on reset timing requirements without external RC networks. |
| Logic-compatible shutdown | SHDN input accepts 0V/1.62–3.6V logic levels - interoperates directly with 1.8V or 3.3V GPIO without level-shifting. |
| Robust protection suite | Thermal shutdown (+165°C), short-circuit current limit (450–650mA), and undervoltage lockout (1.3–1.6V) - prevents damage during fault conditions. |
Applications
| Cellular Handset Power Rail | Notebook Computer Core Logic Supply |
|---|---|
|
Use Scenario: Powers baseband processor I/O or RF transceiver bias rails in GSM/UMTS handsets operating from single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary LDO providing clean, regulated 1.30V at up to 300mA; RESET signals processor boot readiness after battery voltage stabilizes. Use Value: 100mV dropout extends usable battery range by ~120mV compared to legacy 200mV-dropout regulators, delaying brownout shutdown. |
Use Scenario: Supplies 1.30V core voltage to embedded controller or touchpad interface IC in ultraportable notebooks. IC Role / Device Role / Timing Role: Secondary LDO in multi-rail power architecture; RESET output coordinates system-level power-on sequence with main CPU VRM. Use Value: ±0.5% output accuracy ensures reliable logic-level margin for 1.3V-tolerant peripherals, reducing need for margining in BOM design. |
| Digital Camera Image Sensor Bias | PCMCIA Card I/O Interface Regulator |
|
Use Scenario: Provides low-noise 1.30V bias to CMOS image sensor analog front-end in compact digital cameras. IC Role / Device Role / Timing Role: Low-PSRR-sensitive analog supply; RESET asserts during battery insertion or low-VIN to prevent sensor initialization errors. Use Value: 86µVRMS output noise and 70dB PSRR at 1kHz minimize image artifacts caused by switching supply coupling. |
Use Scenario: Regulates 1.30V I/O voltage for PCMCIA Type II card slots in industrial handheld terminals. IC Role / Device Role / Timing Role: Hot-swap capable LDO with fast turn-on (<90µs) and robust short-circuit protection during card insertion. Use Value: 300mA rating supports dual-slot operation; SHDN allows dynamic power gating during card sleep states to reduce system standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1963EZT130+T | Same family, identical 1.30V output and SOT23-6 package, but features 2.2ms RESET delay instead of 70ms. | Targeted at faster-boot systems (e.g., PDAs) where shorter reset hold time is acceptable. | Select MAX1963EZT130+T only if system reset timing budget permits ≤2.2ms assertion; otherwise MAX1976EZT130+T ensures safe µP initialization. |
| Torex XC6219B132MR-G | 1.3V output, 300mA, SOT23-5 package (no RESET pin); dropout 150mV @ 300mA; no integrated reset comparator. | Requires external reset IC or µP internal POR for power sequencing; lacks built-in supervision. | Choose XC6219B132MR-G only when board space is constrained to 5-pin footprint and RESET functionality is handled elsewhere in the system. |
Compared with MAX1963EZT130+T, the MAX1976EZT130+T provides longer reset assertion critical for slower-starting processors, while the XC6219B132MR-G trades integrated supervision for smaller size and lower cost-but demands additional circuitry for reliable power-up sequencing.
Availability
MAX1976EZT130+T is available at Aetrix Electronics and suitable for notebook computers, cellular handsets, and digital camera power management requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for MAX1976EZT130+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management solutions for industrial, communications, and consumer applications.
The MAX1963/MAX1976 product line was designed specifically for ultra-low-input-voltage, high-accuracy LDO regulation in space- and power-constrained portable electronics, emphasizing minimal dropout, tight output tolerance, and integrated power-good signaling.
FAQ
What is the output voltage tolerance of the MAX1976EZT130+T over temperature and load?
The MAX1976EZT130+T guarantees ±0.5% output voltage accuracy over load (1mA to 300mA), line (VIN = VOUT + 0.5V to +3.6V), and temperature (−40°C to +85°C). This specification is confirmed in the Electrical Characteristics table and validated across production testing at +25°C and design-guaranteed over full operating range.
Does the MAX1976EZT130+T require external components for stable operation?
Yes, the MAX1976EZT130+T requires a 1µF ceramic capacitor between IN and GND, and a 4.7µF low-ESR ceramic capacitor between OUT and GND. These are mandatory for stability, transient response, and PSRR performance across −40°C to +85°C, as specified in the Applications Information section.
How does the RESET output behave during shutdown or input undervoltage?
During shutdown (SHDN = GND), the MAX1976EZT130+T actively pulls RESET low. During input undervoltage (VIN < 1.3V), RESET remains asserted low until VIN rises above the UVLO threshold (~1.6V) and VOUT achieves regulation, after which RESET stays low for ≥70ms before releasing.
Can the MAX1976EZT130+T be used with input voltages below 1.62V?
No-the absolute minimum input voltage for regulation is 1.62V. Below this, the MAX1976EZT130+T enters undervoltage lockout (UVLO), disabling regulation and asserting RESET low. Operation below 1.62V is outside specification and not guaranteed.
What is the thermal performance difference between the SOT23 and TDFN packages for the MAX1976?
The MAX1976ETT variant in 3mm × 3mm TDFN offers higher power dissipation (1951mW at +70°C) versus the MAX1976EZT in thin SOT23 (727mW at +70°C), due to lower thermal resistance. However, MAX1976EZT130+T uses the SOT23 package and must be thermally designed with adequate copper pour on GND pin to sustain 300mA at high ambient temperatures.
MAX1976EZT130+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):
- 1.3V
- 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
MAX1976EZT130+T FAQ
1.How can I place an order for MAX1976EZT130+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1976EZT130+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 MAX1976EZT130+T reliable?
The price and inventory of MAX1976EZT130+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1976EZT130+T is usually 5 days.
3.What payment methods are accepted for MAX1976EZT130+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1976EZT130+T transactions.
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4.How is shipping managed for MAX1976EZT130+T?
MAX1976EZT130+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1976EZT130+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 MAX1976EZT130+T?
For technical support, including MAX1976EZT130+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1976EZT130+T requirements.
6.How does Aetrix verify that MAX1976EZT130+T is sourced from the original manufacturer or authorized distributors?
All MAX1976EZT130+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 MAX1976EZT130+T meets industry standards.
7.What is the process for return or replacement of MAX1976EZT130+T?
All MAX1976EZT130+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1976EZT130+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 MAX1976EZT130+T part is unused and in its original packaging.
Return procedure for MAX1976EZT130+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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