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Analog Devices Inc./Maxim Integrated MAX1976ETT120+T
- Part No.:
- MAX1976ETT120+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX1976ETT120+T.pdf
- Description:
- IC REG LINEAR 300MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:22,500
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Product details
Overview
The MAX1976ETT120+T from Maxim Integrated is a low-dropout linear regulator (LDO) with active-low open-drain RESET output, designed for battery-powered portable electronics. It delivers 300mA continuous output current with ±0.5% output voltage accuracy at 1.20V, operates from 1.62V to 3.6V input, and features 100mV dropout at full load - enabling extended battery life in space-constrained applications like notebook computers and handheld devices.
For engineers reviewing the MAX1976ETT120+T datasheet, MAX1976ETT120+T pinout, MAX1976ETT120+T application, or MAX1976ETT120+T equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases, and validated alternative options - all grounded in the official MAX1963/MAX1976 datasheet Rev 2 (2007) and Maxim's ordering documentation.
Technical Context
The MAX1976ETT120+T integrates a P-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) and internal feedback divider to deliver fixed 1.20V output without external resistors. Its RESET output asserts low for ≥70ms after power-up and deasserts only when VOUT reaches ≥82.5% of nominal voltage, providing reliable microprocessor supervision.
It uses BiCMOS process technology (2556 transistors), supports logic-controlled shutdown (ISHDN ≤ 5nA at +85°C), and includes thermal shutdown (+165°C trip, 15°C hysteresis) and current limiting (450–650mA). Ground current remains stable (70–140µA) across load and dropout conditions due to architecture-independent biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.20V ±0.5% over load/line/temp - eliminates need for external feedback network and ensures stable core voltage for low-power processors. |
| Max Output Current | 300mA continuous - sufficient for powering DSPs, memory subsystems, or I/O rails in portable systems without external boost stages. |
| Dropout Voltage | 100mV at 300mA load - enables operation down to ~1.3V input, extending usable battery range in single-cell Li-ion or Li-poly systems. |
| RESET Delay | 70ms (min), 100ms (typ), 160ms (max) - meets JEDEC JESD84-B41 timing requirements for microcontroller reset assertion during cold start. |
| Quiescent Current | 90µA typical at 300mA load - independent of dropout or load, minimizing standby power loss in always-on subsystems. |
| Input Voltage Range | 1.62V to 3.6V - compatible with regulated outputs from buck converters or direct connection to partially discharged batteries. |
| PSRR | 70dB @ f < 1kHz - suppresses ripple from noisy switching supplies upstream, reducing need for additional filtering on sensitive analog rails. |
Pinout & Package
MAX1976ETT120+T is housed in a 6-pin 3mm × 3mm thin DFN (TDFN) package (pkg code T633-2), with exposed paddle (EP) soldered to ground for thermal management. Height is <0.8mm - suitable for ultra-thin mobile designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EP) | Exposed Pad | Thermal ground plane - must be soldered to PCB ground pour to achieve 1951mW max power dissipation at +70°C ambient. |
| 2 | OUT | Regulated 1.20V output - requires 4.7µF low-ESR ceramic capacitor to GND for stability and transient response. |
| 3 | SHDN | Active-low shutdown control - logic high (≥1.4V) enables regulation; logic low (≤0.6V) reduces supply current to <1µA. |
| 4 | GND | Power and signal ground - connects internally to EP; forms return path for OUT, RESET, and SHDN currents. |
| 5 | RESET | Open-drain active-low reset flag - pulled low during power-up/brownout; rises 70–160ms after VOUT stabilizes. |
| 6 | IN | Input supply rail - bypass with ≥1µF ceramic capacitor to GND; accepts 1.62–3.6V with undervoltage lockout at 1.3–1.6V. |
Key Features
| Feature | Design Value |
|---|---|
| Preset 1.20V output | Factory-trimmed accuracy eliminates external resistor network, saving board space and calibration effort in volume production. |
| 70ms minimum RESET delay | Guaranteed assertion time ensures reliable CPU initialization before firmware execution begins - no external RC timing required. |
| Supply current independence | Ground current stays constant (70–140µA) regardless of load or dropout - simplifies battery life estimation and avoids dynamic quiescent spikes. |
| Thermal + short-circuit protection | Auto-recovering shutdown at +165°C with 15°C hysteresis prevents permanent damage during sustained overload or poor heatsinking. |
| Low 100mV dropout at 300mA | Enables >90% efficiency at light-to-moderate loads, reducing heat generation and allowing smaller thermal pads vs. older LDOs. |
Applications
| Smartphone Baseband Power | Notebook CPU Core Rail |
|---|---|
|
Use Scenario: Powers ARM-based baseband processor core in dual-SIM smartphones operating from single-cell Li-ion battery (3.0–4.2V). IC Role / Device Role / Timing Role: Primary 1.20V LDO with integrated RESET for safe boot sequencing and brownout detection. Use Value: 100mV dropout extends usable battery voltage down to 1.3V, adding ~8% runtime vs. 200mV-dropout alternatives. |
Use Scenario: Supplies low-noise 1.20V to Intel Atom or AMD Ryzen Embedded CPU cores in fanless ultrabooks. IC Role / Device Role / Timing Role: Secondary regulated rail with precise voltage accuracy and PSRR >70dB to suppress switcher noise. Use Value: ±0.5% output tolerance meets Intel VR13 spec for core voltage, eliminating need for external DAC trimming. |
| Digital Camera Image Sensor Bias | PCMCIA Card I/O Interface |
|
Use Scenario: Provides clean 1.20V bias to CMOS image sensor analog front-end in compact action cameras. IC Role / Device Role / Timing Role: Low-noise, low-dropout regulator with fast load-transient response (<20mV overshoot). Use Value: 86µVRMS output noise and 20µs transient recovery minimize image sensor fixed-pattern noise. |
Use Scenario: Generates 1.20V I/O supply for PCMCIA Type II card controllers in industrial data loggers. IC Role / Device Role / Timing Role: Compact, RoHS-compliant LDO with logic-controlled shutdown for hot-swap compliance. Use Value: 3mm × 3mm TDFN footprint fits within tight PCMCIA card height constraints (<5.5mm total). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79512DCQ | 1.2V fixed, 250mA, 170mV dropout at 250mA, 1.7V min input, no integrated RESET | Lacks RESET function - requires external supervisor IC for power-on reset timing | Choose if RESET is handled elsewhere and lower cost is prioritized over integration. |
| MCP1826-1202E/DB | 1.2V fixed, 300mA, 350mV dropout at 300mA, 2.3V min input, no RESET | Higher dropout and input voltage limit restrict usable battery range vs. MAX1976ETT120+T | Acceptable only in systems with regulated 2.5V+ input where size and low-VIN capability are secondary. |
Compared with TPS79512DCQ and MCP1826-1202E/DB, the MAX1976ETT120+T uniquely combines 1.20V precision, 300mA delivery, sub-1.62V operation, and guaranteed 70ms RESET in a 3mm × 3mm package - making it irreplaceable for space- and battery-limited portable designs requiring integrated supervision.
Availability
MAX1976ETT120+T is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, and digital cameras requiring stable component supply with RoHS/lead-free compliance and full traceability.
Supply support for MAX1976ETT120+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 ICs for industrial, communications, and consumer applications.
The MAX1963/MAX1976 product line was engineered specifically for ultra-low-input-voltage, high-accuracy LDO regulation in portable battery-powered equipment - emphasizing minimal dropout, integrated RESET, and compact packaging.
FAQ
What is the output voltage tolerance of the MAX1976ETT120+T over temperature and load?
The MAX1976ETT120+T guarantees ±0.5% output voltage accuracy across -40°C to +85°C, 1mA to 300mA load, and 1.8V to 3.6V input - confirmed in the Electrical Characteristics table (page 2 of datasheet Rev 2). This specification applies directly to the MAX1976ETT120+T and is tighter than the ±2.5% typical family-wide limit.
Does the MAX1976ETT120+T require external capacitors, and what values are recommended?
Yes - the MAX1976ETT120+T requires a 1µF ceramic capacitor between IN and GND, and a 4.7µF low-ESR ceramic capacitor between OUT and GND, as specified in the Applications Information section (page 7). These values ensure stability, transient response, and noise suppression across the full operating range of the MAX1976ETT120+T.
How does the RESET output of the MAX1976ETT120+T behave during shutdown?
When SHDN is pulled low, the MAX1976ETT120+T actively pulls RESET low immediately - as stated in the Pin Description (page 6). This behavior ensures the host microcontroller remains held in reset during intentional shutdown, preventing unintended execution. The MAX1976ETT120+T maintains this state until SHDN returns high and VOUT re-stabilizes.
What is the thermal performance difference between the SOT23 and TDFN packages for the MAX1976ETT120+T?
The MAX1976ETT120+T uses the TDFN package (T633-2), which offers 1951mW max power dissipation at +70°C ambient - more than 2.6× higher than the 727mW rating of the SOT23 variant. This allows sustained 300mA operation at higher input-output differentials, as shown in Figure 3 of the datasheet - a key advantage of the MAX1976ETT120+T over SOT23 versions.
Is the MAX1976ETT120+T pin-compatible with other members of the MAX1963/MAX1976 family?
Yes - all MAX1963/MAX1976 variants in the TDFN package (including MAX1976ETT120+T) share identical pinout, footprint, and thermal pad layout per the T633-2 drawing (page 11). However, output voltage and RESET delay differ by part number; substituting a MAX1976ETT150+T would deliver 1.50V instead of 1.20V, requiring schematic and firmware review before replacement.
MAX1976ETT120+T 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):
- 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:
- 6-TDFN-EP (3x3)
MAX1976ETT120+T FAQ
1.How can I place an order for MAX1976ETT120+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1976ETT120+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 MAX1976ETT120+T reliable?
The price and inventory of MAX1976ETT120+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1976ETT120+T is usually 5 days.
3.What payment methods are accepted for MAX1976ETT120+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1976ETT120+T transactions.
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4.How is shipping managed for MAX1976ETT120+T?
MAX1976ETT120+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1976ETT120+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 MAX1976ETT120+T?
For technical support, including MAX1976ETT120+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1976ETT120+T requirements.
6.How does Aetrix verify that MAX1976ETT120+T is sourced from the original manufacturer or authorized distributors?
All MAX1976ETT120+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 MAX1976ETT120+T meets industry standards.
7.What is the process for return or replacement of MAX1976ETT120+T?
All MAX1976ETT120+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1976ETT120+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 MAX1976ETT120+T part is unused and in its original packaging.
Return procedure for MAX1976ETT120+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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