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Analog Devices Inc./Maxim Integrated MAX1976ETT120
- Part No.:
- MAX1976ETT120
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX1976ETT120.pdf
- Description:
- IC REG LINEAR 300MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:19,516
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Product details
Overview
MAX1976ETT120 from Maxim Integrated is a low-dropout linear regulator delivering 300mA continuous output current with ±0.5% output voltage accuracy at 1.20V, 100mV dropout at full load, and a 70ms active-low open-drain RESET flag assertion time. It operates from 1.62V to 3.6V input and integrates thermal-overload and short-circuit protection - used in battery-powered portable electronics requiring precise, low-voltage power regulation.
For engineers reviewing the MAX1976ETT120 datasheet, MAX1976ETT120 pinout, MAX1976ETT120 application, or MAX1976ETT120 equivalent, key selection criteria include guaranteed 300mA load capability under 1.62V minimum input, 70ms reset delay timing, TDFN-6 package thermal performance, and preset 1.20V output with ±0.5% accuracy over temperature and load.
Technical Context
The MAX1976ETT120 employs an internal P-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) enabling supply current independence from load and dropout voltage. Its error amplifier compares a stable reference against feedback from a fixed internal divider to regulate 1.20V output with high DC accuracy.
RESET functionality uses a dedicated comparator monitoring VOUT, asserting low when output falls below 82.5% of nominal (±1.7% hysteresis) and holding for ≥70ms after regulation is achieved. Shutdown is logic-controlled via active-low SHDN, reducing quiescent current to <1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.20V preset, ±0.5% accuracy over -40°C to +85°C, load (1–300mA), and line (VIN = VOUT + 0.5V to 3.6V) |
| Max Output Current | 300mA continuous; current limit triggers at 450mA min to protect against overload |
| Dropout Voltage | 100mV at 300mA load and VOUT ≥ 1.8V; enables operation down to 1.32V input for 1.20V output |
| Input Voltage Range | 1.62V to 3.6V - supports single-cell Li-ion, Li-polymer, and multi-cell alkaline/NiMH systems |
| RESET Delay | 70ms (min) to 100ms (max) after VOUT reaches regulation - ensures reliable µP initialization |
| Quiescent Current | 90µA typical at 300mA load; drops to 70µA in dropout - preserves battery life in portable devices |
| PSRR | 70dB at f < 1kHz - suppresses low-frequency supply noise critical for RF and analog subsystems |
Pinout & Package
MAX1976ETT120 is housed in a 6-pin 3mm × 3mm thin DFN (TDFN) package with exposed paddle (EP) for thermal dissipation. Package code T633-2; height <0.8mm; RoHS-compliant (lead-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EP) | Exposed Pad | Thermal ground and mechanical heatsink - must be soldered to large PCB ground plane |
| 2 | OUT | Regulated 1.20V output; sources up to 300mA; requires 4.7µF low-ESR ceramic bypass to GND |
| 3 | SHDN | Active-low shutdown control; <1µA leakage when pulled low; connects to IN or logic high for normal operation |
| 4 | GND | Power and signal ground; electrically tied to EP; forms return path for all currents |
| 5 | RESET | Open-drain, active-low reset flag; asserts low during power-up/brownout; rises ≥70ms after VOUT regulation |
| 6 | IN | Input supply (1.62–3.6V); bypassed with ≥1µF ceramic capacitor to GND for stability |
Key Features
| Feature | Design Value |
|---|---|
| Preset 1.20V output | Factory-trimmed internal feedback eliminates external resistors - reduces BOM count and layout area |
| 70ms RESET assertion | Guaranteed minimum delay ensures microprocessor reset timing compliance without external RC networks |
| P-channel MOSFET pass device | RDS(ON) = 0.33Ω enables low dropout and eliminates base-drive current - improves efficiency vs. PNP-based LDOs |
| Thermal shutdown with hysteresis | Triggers at +165°C; re-enables after 15°C cooldown - prevents latch-up and enables safe fault recovery |
| Logic-controlled shutdown | Reduces supply current to <1µA; internal 1.5kΩ pull-down on OUT during shutdown - avoids floating rail issues |
Applications
| Smartphone Baseband Power | Digital Camera Core Logic |
|---|---|
Use Scenario: Powers ARM-based application processor core in smartphones operating from single-cell Li-ion battery (3.0–4.2V). IC Role / Device Role / Timing Role: Primary 1.20V core LDO supplying CPU I/O and memory interface with tight voltage tolerance and fast transient response. Use Value: 100mV dropout extends usable battery range by ~120mV; ±0.5% accuracy ensures SoC timing margin compliance. |
Use Scenario: Supplies image signal processor (ISP) and sensor interface in compact digital cameras with limited PCB space. IC Role / Device Role / Timing Role: Low-profile 1.20V regulator with integrated RESET for controlled ISP boot sequence and brownout detection. Use Value: TDFN-6 package (<0.8mm height) fits ultra-thin camera modules; 70ms RESET meets JEDEC JESD78 requirements. |
| Handheld Medical Monitor | Industrial IoT Sensor Node |
Use Scenario: Powers low-power MCU and analog front-end in battery-operated ECG/SpO₂ monitors requiring long runtime and clinical-grade reliability. IC Role / Device Role / Timing Role: Precision 1.20V rail generator with thermal and short-circuit protection for safety-critical analog signal chain. Use Value: ±0.5% output accuracy maintains ADC reference integrity; thermal shutdown prevents overheating in sealed enclosures. |
Use Scenario: Regulates 1.20V for ultra-low-power wireless SoC (e.g., Nordic nRF52) in remote environmental sensors powered by coin cells or energy harvesters. IC Role / Device Role / Timing Role: High-efficiency LDO enabling >10-year battery life; RESET synchronizes firmware startup after cold boot. Use Value: 90µA quiescent current minimizes standby drain; 1.62V minimum input supports discharge down to 1.8V coin cell end-of-life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B122MR-G | 1.20V fixed output, 200mA max, 150mV dropout at 200mA, SOT-25 package | Limited to 200mA; lacks integrated RESET; smaller footprint but lower thermal capacity | Select when 200mA suffices and RESET is implemented externally; not suitable for 300mA or thermal-intensive layouts. |
| Analog Devices ADP160ACBZ-1.2-R7 | 1.20V fixed output, 150mA max, 195mV dropout at 150mA, 5-lead TSOT package | No RESET output; lower current rating; higher dropout limits usable input range | Choose only for space-constrained, low-current designs where RESET is unnecessary and thermal load is minimal. |
Compared with XC6219B122MR-G and ADP160ACBZ-1.2-R7, MAX1976ETT120 uniquely delivers 300mA at 100mV dropout with factory-trimmed 1.20V accuracy and integrated 70ms RESET - making it optimal for thermally demanding, high-reliability portable systems requiring no external supervision circuitry.
Availability
MAX1976ETT120 is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, and handheld medical monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1976ETT120 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 and mixed-signal ICs for power management, data conversion, and interface applications in industrial, automotive, and consumer markets.
The MAX1963/MAX1976 product line targets battery-powered portable electronics needing low-input-voltage, high-accuracy LDOs with integrated power-good supervision - optimized for space, efficiency, and reliability in compact form factors.
FAQ
What is the exact output voltage and accuracy of the MAX1976ETT120?
The MAX1976ETT120 provides a factory-preset 1.20V output with ±0.5% accuracy over the full operating temperature range (-40°C to +85°C), load (1mA to 300mA), and line (input from VOUT + 0.5V to 3.6V). This specification is production-tested and guaranteed - not typical-only - ensuring consistent performance in production systems using MAX1976ETT120.
Does the MAX1976ETT120 require external resistors to set its output voltage?
No, the MAX1976ETT120 does not require external resistors. Its 1.20V output is internally trimmed and fixed at wafer level, eliminating feedback resistor networks. This simplifies design, saves board space, improves long-term stability, and removes resistor tolerance and temperature drift variables - a key advantage of the MAX1976ETT120 in precision applications.
What is the function and timing behavior of the RESET pin on the MAX1976ETT120?
The RESET pin on the MAX1976ETT120 is an open-drain, active-low output that remains asserted (low) for at least 70ms after VOUT reaches regulation. It de-asserts immediately if VOUT drops below 82.5% of nominal (1.20V), or during SHDN activation. This behavior ensures robust microprocessor reset sequencing in systems using MAX1976ETT120 as the primary core regulator.
Can the MAX1976ETT120 operate from a single-cell Li-ion battery throughout its full discharge curve?
Yes. With a minimum input voltage of 1.62V and 100mV dropout at 300mA, the MAX1976ETT120 sustains 1.20V output down to 1.32V input - well within the 2.7–4.2V discharge range of a typical single-cell Li-ion battery. Its 1.62V UVLO threshold also prevents erratic operation near end-of-life, making MAX1976ETT120 suitable for full-cycle battery operation.
How does the thermal performance of the MAX1976ETT120 compare between TDFN and SOT23 packages?
The MAX1976ETT120's TDFN-6 package (T633-2) offers significantly better thermal performance than the SOT23 variant: its power dissipation limit is 1951mW at +70°C (vs. 727mW for SOT23), due to lower θJA enabled by the exposed paddle. This allows sustained 300mA operation at higher input-output differentials - a critical advantage for thermally constrained designs using MAX1976ETT120.
MAX1976ETT120 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):
- 1.2V
- 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)
MAX1976ETT120 FAQ
1.How can I place an order for MAX1976ETT120 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1976ETT120 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 MAX1976ETT120 reliable?
The price and inventory of MAX1976ETT120 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1976ETT120 is usually 5 days.
3.What payment methods are accepted for MAX1976ETT120?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1976ETT120 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1976ETT120?
MAX1976ETT120 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1976ETT120 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 MAX1976ETT120?
For technical support, including MAX1976ETT120 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1976ETT120 requirements.
6.How does Aetrix verify that MAX1976ETT120 is sourced from the original manufacturer or authorized distributors?
All MAX1976ETT120 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 MAX1976ETT120 meets industry standards.
7.What is the process for return or replacement of MAX1976ETT120?
All MAX1976ETT120 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1976ETT120, 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 MAX1976ETT120 part is unused and in its original packaging.
Return procedure for MAX1976ETT120:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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