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Analog Devices Inc./Maxim Integrated MAX1976AETT180+
- Part No.:
- MAX1976AETT180+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX1976AETT180+.pdf
- Description:
- IC REG LINEAR 1.8V 300MA 6TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:281
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Product details
Overview
MAX1976AETT180+ from Maxim Integrated is a low-dropout linear regulator with preset 1.80V output, delivering guaranteed 300mA continuous current at ≤100mV dropout (at 300mA), ±0.5% output voltage accuracy over load/line/temp, and a 70ms active-low open-drain RESET flag. It operates from 1.62V to 3.6V input and targets power management in space-constrained portable systems such as handheld computers and smart phones.
For engineers reviewing the MAX1976AETT180+ datasheet, MAX1976AETT180+ pinout, MAX1976AETT180+ application, or MAX1976AETT180+ equivalent, key selection criteria include its 1.80V fixed output, 70ms reset delay, TDFN-6 (3mm × 3mm) package, thermal shutdown at +165°C, and compatibility with low-ESR ceramic output capacitors for stable 300mA delivery under battery-voltage droop.
Technical Context
The MAX1976AETT180+ integrates a p-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) enabling supply current independence from load and dropout voltage. Its internal error amplifier compares a trimmed reference against feedback to regulate output, while a dedicated power-good comparator drives the open-drain RESET output.
RESET assertion occurs when VOUT falls below 82.5% of nominal (±2.5% threshold accuracy) and remains asserted ≥70ms after VOUT recovers; shutdown reduces quiescent current to <1µA and actively pulls RESET low. Thermal protection disables the pass transistor above +165°C with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.80V - eliminates external resistor divider, ensures precise core logic rail for 1.8V I/O or processor domains. |
| Max Output Current | 300mA continuous - supports moderate-power subsystems like baseband processors or display drivers without derating at +70°C. |
| Dropout Voltage | 100mV at 300mA - enables operation down to VIN = 1.90V, extending usable life of single-cell Li-ion batteries. |
| Output Accuracy | ±0.5% at TA = +25°C - meets tight tolerance requirements for memory I/O and digital logic supply rails. |
| RESET Delay | 70ms (min) - provides sufficient hold-off time for microprocessor initialization sequences after power-up or brownout recovery. |
| Quiescent Current | 90µA typical at 300mA load - maintains ultra-low standby power in always-on system blocks. |
| PSRR | 70dB @ f < 1kHz - suppresses low-frequency noise from switching converters feeding the LDO input. |
Pinout & Package
MAX1976AETT180+ is housed in a RoHS-compliant 6-pin TDFN package (3mm × 3mm, 0.8mm height) with exposed paddle (EP) for thermal dissipation. The EP must be soldered to a PCB ground plane to achieve rated 1904.8mW power dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 1.62V–3.6V; requires ≥1µF ceramic bypass to GND close to pin for stability and transient response. |
| 2 - GND | Ground reference and thermal path | Primary ground return; connects internally to EP for heatsinking-must be tied to large copper area. |
| 3 - SHDN | Active-low shutdown control | Pull low to disable regulator (IQ < 1µA); high-impedance input with 1.4V VIH threshold ensures compatibility with 1.8V logic. |
| 4 - RESET | Open-drain reset flag output | Asserts low during power-up/brownout; releases 70ms after VOUT reaches regulation; requires external pull-up. |
| 5 - I.C. | Internally connected node | No functional connection; leave unconnected or tie to GND-no impact on regulation or RESET timing. |
| 6 - OUT | Regulated output | Delivers 1.80V at up to 300mA; requires 4.7µF low-ESR ceramic capacitor to GND for stability and noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| pMOS Pass Transistor | RDS(ON) = 0.33Ω enables 100mV dropout at full 300mA load while maintaining 90µA quiescent current independent of load or dropout. |
| 70ms RESET Timing | Deterministic delay ensures reliable µP reset assertion during slow-rising or noisy supply conditions-distinct from MAX1963A's 2.2ms version. |
| Thermal Shutdown | +165°C trip with 15°C hysteresis prevents permanent damage during sustained overload or poor heatsinking; enables pulsed safe-mode operation. |
| Low-ESR Stability | Stable with 4.7µF ceramic output capacitor (ESR ≤30mΩ), eliminating need for tantalum or electrolytic caps and reducing board area. |
| Logic-Controlled Shutdown | SHDN input draws only 1nA bias current and supports direct interface to 1.8V/3.3V GPIO without level-shifting. |
Applications
| Smartphone Baseband Power | Portable Media Player Core Rail |
|---|---|
|
Use Scenario: Supplying 1.80V to baseband processor I/O banks in LTE smartphones operating from single-cell Li-ion (2.8V–4.2V). IC Role / Device Role / Timing Role: Primary low-noise, low-dropout post-regulator converting switched DC/DC output to clean 1.80V logic rail with integrated reset supervision. Use Value: 100mV dropout extends usable battery range by ~120mV; 70ms RESET ensures reliable boot sequencing after cold start or voltage sag. |
Use Scenario: Powering NAND flash and audio codec in DSC/MP3 players where compact size and low quiescent current are critical. IC Role / Device Role / Timing Role: Fixed-output LDO providing regulated 1.80V supply with shutdown control and reset signaling for system-level power management. Use Value: 90µA quiescent current minimizes standby drain; TDFN-6 footprint (3mm × 3mm) fits tight PCB real estate near flash memory packages. |
| Notebook Subsystem I/O Rail | PCMCIA Card Power Management |
|
Use Scenario: Delivering 1.80V to USB controller or PCIe endpoint logic in ultraportable notebooks with dynamic voltage scaling. IC Role / Device Role / Timing Role: High-accuracy LDO with ±0.5% output tolerance ensuring signal integrity across temperature and load transients. Use Value: ±2.5% load/line/temp accuracy guarantees compliance with JEDEC 1.8V I/O specs; PSRR >70dB suppresses noise from shared DC/DC sources. |
Use Scenario: Regulating 1.80V for PCMCIA Type II card interfaces requiring hot-plug detection and controlled power sequencing. IC Role / Device Role / Timing Role: Reset-enabled LDO providing power-good indication and controlled enable/disable via SHDN for card insertion/removal events. Use Value: Active-low open-drain RESET allows wired-OR with other supervisors; shutdown current <1µA meets PCMCIA power-down leakage limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1976AETT150+ | Fixed 1.50V output; identical package, pinout, and 70ms RESET timing. | Targets 1.5V logic domains (e.g., DDR2 SDRAM I/O) instead of 1.8V systems. | Select when system requires 1.5V rail-no layout change needed, but verify voltage compatibility with load ICs. |
| Torex XC6219B182MR-G | 1.8V output, 300mA, 150mV dropout (typ), 200ms RESET delay, SOT-25 package. | Larger dropout and longer reset delay; lacks thermal shutdown hysteresis specification. | Use where cost sensitivity outweighs precision timing and thermal robustness; requires PCB redesign due to different pinout and package. |
Compared with MAX1976AETT180+, the MAX1976AETT150+ offers identical functionality at 1.5V with zero layout impact, while the XC6219B182MR-G trades tighter voltage accuracy and faster thermal response for lower unit cost and broader availability-but demands board revision and revalidation of reset timing margins.
Availability
MAX1976AETT180+ is available at Aetrix Electronics and suitable for smartphone baseband power, portable media player core rails, and notebook subsystem I/O requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1976AETT180+ 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, communications, and consumer applications.
The MAX1963A/MAX1976A family delivers low-input-voltage, high-accuracy LDOs with integrated reset for battery-powered portable electronics-optimized for minimal board space, extended battery life, and robust power sequencing.
FAQ
What is the exact output voltage tolerance of the MAX1976AETT180+ over temperature and load?
The MAX1976AETT180+ guarantees ±0.5% output voltage accuracy at +25°C and ±2.5% over full -40°C to +85°C temperature range, 1mA to 300mA load, and 1.62V to 3.6V input. This includes line, load, and temperature effects-verified per Maxim's production test limits and documented in the Electrical Characteristics table.
Does the MAX1976AETT180+ require an external pull-up resistor on the RESET pin?
Yes, the MAX1976AETT180+ features an open-drain RESET output and requires an external pull-up resistor (typically 10kΩ to 3.3V or VCC) to generate a valid logic-high level. Without it, RESET remains floating and cannot signal proper power-good status to downstream logic or microcontrollers.
Can the MAX1976AETT180+ operate with a 1.65V input supply?
Yes-the MAX1976AETT180+ supports input voltages as low as 1.62V. At 1.65V input and 1.80V output, it operates in dropout mode (VIN < VOUT + dropout), delivering reduced but stable current. Ground current drops to 70µA in dropout, preserving battery life during deep discharge.
What thermal performance can be expected from the MAX1976AETT180+ in its TDFN-6 package?
In a standard multilayer PCB with EP soldered to a 200mm² ground plane, the MAX1976AETT180+ achieves 23.8mW/°C derating above +70°C, allowing 1904.8mW continuous dissipation at +70°C ambient. Junction temperature must stay ≤+150°C for reliability; thermal shutdown activates at +165°C with 15°C hysteresis.
Is the MAX1976AETT180+ pin-compatible with the MAX1963A series?
Yes-MAX1976AETT180+ shares identical pinout, package dimensions, and electrical interface with MAX1963A variants in the same TDFN-6 or SOT23-6 packages. The only functional difference is RESET delay (70ms vs. 2.2ms); all other timing, accuracy, and protection features are identical.
MAX1976AETT180+ 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):
- 1.8V
- 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TDFN (3x3)
MAX1976AETT180+ FAQ
1.How can I place an order for MAX1976AETT180+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1976AETT180+ 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 MAX1976AETT180+ reliable?
The price and inventory of MAX1976AETT180+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1976AETT180+ is usually 5 days.
3.What payment methods are accepted for MAX1976AETT180+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1976AETT180+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1976AETT180+?
MAX1976AETT180+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1976AETT180+ 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 MAX1976AETT180+?
For technical support, including MAX1976AETT180+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1976AETT180+ requirements.
6.How does Aetrix verify that MAX1976AETT180+ is sourced from the original manufacturer or authorized distributors?
All MAX1976AETT180+ 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 MAX1976AETT180+ meets industry standards.
7.What is the process for return or replacement of MAX1976AETT180+?
All MAX1976AETT180+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1976AETT180+, 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 MAX1976AETT180+ part is unused and in its original packaging.
Return procedure for MAX1976AETT180+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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