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Analog Devices Inc./Maxim Integrated MAX1976EZT160+T
- Part No.:
- MAX1976EZT160+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MAX1976EZT160+T.pdf
- Description:
- IC REG LINEAR 300MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
MAX1976EZT160+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 1.60V 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 handheld devices.
For engineers reviewing the MAX1976EZT160+T datasheet, MAX1976EZT160+T pinout, MAX1976EZT160+T application, or MAX1976EZT160+T equivalent, key selection criteria include guaranteed 300mA load capability under low-input-voltage conditions (≥1.62V), precise 1.60V output tolerance, thermal-overload and short-circuit protection, and compatibility with ceramic input/output capacitors (1µF/4.7µF) for stable operation in space-constrained designs.
Technical Context
The MAX1976EZT160+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 electronics. Its error amplifier compares a trimmed internal reference against feedback from a fixed-resistor divider to maintain regulation.
RESET functionality is implemented via a dedicated comparator monitoring VOUT; it asserts low when output falls below 82.5% of nominal (1.60V → 1.32V threshold) and deasserts after ≥70ms once 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 1.60V ±0.5% - ensures stable core voltage for low-power microcontrollers and memory without external feedback components. |
| Max Output Current | 300mA continuous - supports moderate-power digital subsystems like USB PHYs or display drivers without thermal derating in SOT23 package. |
| Dropout Voltage | 100mV at 300mA - enables operation down to 1.70V 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 regulated intermediate rails in multi-rail power architectures. |
| RESET Delay | 70ms minimum - provides sufficient power-good hold-off for microprocessor initialization sequences before release from reset. |
| Quiescent Current | 90µA typical at 300mA - minimizes no-load battery drain during system sleep modes while maintaining fast wake-up response. |
| Thermal Shutdown | 165°C with 15°C hysteresis - protects against sustained overload or poor PCB heatsinking without latch-up behavior. |
Pinout & Package
MAX1976EZT160+T is housed in a 6-pin thin SOT23-6 package (package code Z6-1), measuring <1.1mm height, 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), and 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 close to pin for stability and noise rejection. |
| 2 (GND) | Ground Reference | Primary return path for load, bias, and RESET; must connect to large copper area for thermal dissipation in SOT23. |
| 3 (SHDN) | Active-Low Enable | Pulls low to disable regulator; draws <5nA bias current, enabling direct GPIO control without level-shifting. |
| 4 (RESET) | Open-Drain Reset Flag | Asserts low during power-up/brownout; requires external pull-up to host supply (e.g., 3.3V) for µP reset signaling. |
| 5 (I.C.) | Internally Connected | No functional connection required; may be left floating or tied to GND per layout best practice for noise immunity. |
| 6 (OUT) | Regulated Output | Delivers up to 300mA at 1.60V; requires ≥4.7µF low-ESR ceramic capacitor to GND for transient response and PSRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Low 1.62V Minimum Input | Enables direct regulation from single-cell Li-ion (2.7–4.2V) even at end-of-discharge (~1.7V), eliminating need for boost pre-regulators. |
| ±0.5% Output Accuracy | Guaranteed over temperature (-40°C to +85°C), line, and load - reduces margining requirements in precision analog or RF subsystems. |
| 70ms RESET Assertion | Ensures reliable microprocessor reset timing across voltage ramp rates, meeting JEDEC JESD84-B41 specification for NAND flash boot reliability. |
| Thermal & Short-Circuit Protection | Auto-recovering shutdown prevents damage during solder reflow, board-level test shorts, or sustained overloads without manual intervention. |
| Supply Current Independence | Ground current remains ~90µA regardless of load or dropout - simplifies battery life estimation and eliminates dynamic current spikes during load transients. |
Applications
| Smartphone Baseband Power | Notebook CPU Core Supply |
|---|---|
Use Scenario: Powers baseband processor core rail in LTE smartphones where input is derived from a buck converter stepping down from 3.8V battery. IC Role / Device Role / Timing Role: Primary LDO providing clean, tightly regulated 1.60V at up to 300mA with integrated RESET for controlled boot sequence. Use Value: 100mV dropout extends operational time by >15 minutes at end-of-battery discharge; ±0.5% accuracy avoids core voltage violation during DVFS transitions. | Use Scenario: Supplies I/O or auxiliary logic in ultrabook platforms requiring stable 1.60V from a shared 3.3V intermediate rail. IC Role / Device Role / Timing Role: Secondary LDO with RESET flag synchronized to main PMIC power-good signal for coordinated subsystem enable. Use Value: 70ms RESET delay matches Intel Platform Controller Hub (PCH) reset timing requirements; SOT23 footprint saves board area vs. larger alternatives. |
| Digital Camera Image Sensor Bias | Industrial Handheld Scanner |
Use Scenario: Provides bias voltage to CMOS image sensor analog front-end in compact action cameras. IC Role / Device Role / Timing Role: Low-noise LDO generating 1.60V reference for ADC and analog signal chain, with RESET ensuring clean sensor initialization. Use Value: 86µVRMS output noise and 70dB PSRR at 1kHz prevent image banding; 1.62V min input supports operation from partially depleted 2-cell alkaline packs. | Use Scenario: Powers ARM Cortex-M4 MCU and BLE radio in ruggedized barcode scanners operating on replaceable AA batteries. IC Role / Device Role / Timing Role: Main system regulator with logic-controlled shutdown and RESET for firmware update safety and brownout recovery. Use Value: Active-low SHDN draws <1µA in sleep mode, enabling >1-year shelf life; thermal protection prevents field failure during extended scanning sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0516PDBVR | Lower quiescent current (25µA), but only 200mA output and 1.2V min input; no integrated RESET. | Lacks RESET functionality and lower current rating limits use in microprocessor power domains requiring reset coordination. | Select when ultra-low IQ dominates design priority and RESET is handled externally or not required. |
| MCP1826-1602E/DB | Same 1.60V output and 300mA rating, but 2.3V min input and 250mV dropout; includes RESET but with 200ms delay. | Higher dropout and input requirement reduce battery runtime; longer RESET delay may violate tight boot timing in modern SoCs. | Choose only if legacy design compatibility or specific Microchip ecosystem integration is mandatory. |
Compared with TPS7A0516PDBVR and MCP1826-1602E/DB, MAX1976EZT160+T uniquely balances 1.62V minimum input, 100mV dropout, ±0.5% accuracy, and 70ms RESET-enabling longer battery life and tighter system-level timing control in next-generation portable devices.
Availability
MAX1976EZT160+T is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, personal digital assistants (PDAs), and digital cameras requiring stable component supply with RoHS-compliant packaging and tape-and-reel delivery.
Supply support for MAX1976EZT160+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) designs high-performance analog and mixed-signal ICs for power management, data conversion, and interface applications.
The MAX1963/MAX1976 product line targets portable battery-powered equipment, emphasizing ultra-low-input-voltage operation, high accuracy, and integrated power-good supervision for reliable system startup and brownout recovery.
FAQ
What is the output voltage tolerance of MAX1976EZT160+T over temperature and load?
The MAX1976EZT160+T guarantees ±0.5% output voltage accuracy over the full operating temperature range (-40°C to +85°C), load (1mA to 300mA), and line (VIN = VOUT + 0.5V to +3.6V). This is confirmed in the Electrical Characteristics table of the official datasheet, where the "Output Voltage Accuracy" parameter is specified as ±0.5% under those exact conditions. The MAX1976EZT160+T achieves this via factory-trimmed internal resistive feedback, eliminating external component variation.
Does MAX1976EZT160+T require external capacitors, and what values are recommended?
Yes, MAX1976EZT160+T requires two external ceramic capacitors: a 1µF capacitor between IN and GND, and a 4.7µF low-ESR ceramic capacitor between OUT and GND. These values are specified in the Typical Operating Circuit and Applications Information sections of the datasheet. Using capacitors outside this range-especially higher ESR (>30mΩ) on the output-can degrade stability, transient response, and PSRR performance. The MAX1976EZT160+T is optimized for these values and does not support ceramic capacitors smaller than 1µF on the input.
How does the RESET function behave during shutdown or input undervoltage?
During shutdown (SHDN = GND), the RESET output of MAX1976EZT160+T is actively pulled low. During input undervoltage (VIN falling below 1.60V), RESET remains asserted low until VOUT rises above 82.5% of 1.60V (i.e., 1.32V) and stays asserted for ≥70ms thereafter. This dual-trigger behavior-responsive to both VOUT drop and SHDN assertion-ensures robust microprocessor reset under all fault conditions. The MAX1976EZT160+T datasheet explicitly confirms RESET falls immediately upon shutdown activation.
Can MAX1976EZT160+T be used with a 1.5V input supply?
No, MAX1976EZT160+T cannot operate reliably with a 1.5V input supply. Its absolute minimum input voltage is 1.62V, and its dropout voltage is 100mV at 300mA-meaning it requires at least 1.70V input to sustain 1.60V output at full load. At 1.5V input, the device will be in dropout and unable to regulate; output voltage will collapse. The datasheet's Absolute Maximum Ratings and Electrical Characteristics tables confirm VIN must be ≥1.62V, and operation below that violates specification.
What is the thermal performance of MAX1976EZT160+T in the SOT23 package at 300mA load?
In the 6-pin thin SOT23 package, MAX1976EZT160+T delivers 300mA continuously only when the input-output differential is ≤2.0V (e.g., VIN = 3.6V → VOUT = 1.6V yields 2.0V drop). At TA = +85°C, maximum recommended output current drops to ~220mA due to thermal limits (Figure 2). The device features thermal shutdown at +165°C with 15°C hysteresis, allowing pulsed operation under overload-but sustained 300mA at high ambient temperatures requires adequate PCB copper area connected to Pin 2 (GND) for heatsinking.
MAX1976EZT160+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):
- 1.6V
- 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
MAX1976EZT160+T FAQ
1.How can I place an order for MAX1976EZT160+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1976EZT160+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 MAX1976EZT160+T reliable?
The price and inventory of MAX1976EZT160+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1976EZT160+T is usually 5 days.
3.What payment methods are accepted for MAX1976EZT160+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1976EZT160+T transactions.
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4.How is shipping managed for MAX1976EZT160+T?
MAX1976EZT160+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1976EZT160+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 MAX1976EZT160+T?
For technical support, including MAX1976EZT160+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1976EZT160+T requirements.
6.How does Aetrix verify that MAX1976EZT160+T is sourced from the original manufacturer or authorized distributors?
All MAX1976EZT160+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 MAX1976EZT160+T meets industry standards.
7.What is the process for return or replacement of MAX1976EZT160+T?
All MAX1976EZT160+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1976EZT160+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 MAX1976EZT160+T part is unused and in its original packaging.
Return procedure for MAX1976EZT160+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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