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Analog Devices Inc./Maxim Integrated MAX1976EZT100
- Part No.:
- MAX1976EZT100
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MAX1976EZT100.pdf
- Description:
- IC REG LINEAR 300MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:4,018
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Product details
Overview
MAX1976EZT100 from Maxim Integrated is a low-dropout linear regulator (LDO) delivering 300mA continuous output current with 100mV dropout at full load, ±0.5% output voltage accuracy, and a fixed 1.00V output. It operates from 1.62V to 3.6V input, features active-low open-drain RESET with 70ms delay, and is designed for space-constrained battery-powered systems such as notebook computers and cellular handsets.
For engineers reviewing the MAX1976EZT100 datasheet, MAX1976EZT100 pinout, MAX1976EZT100 application, or MAX1976EZT100 equivalent, key selection criteria include guaranteed 300mA output under low-input-voltage conditions (≥1.62V), precise 1.00V regulation, thermal/short-circuit protection, logic-controlled shutdown, and compatibility with 4.7µF ceramic output capacitance for stable transient response.
Technical Context
The MAX1976EZT100 uses an internal P-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) enabling supply current independence from load and dropout voltage - critical for battery runtime optimization. Its error amplifier compares feedback against a precision reference to regulate output, while integrated power-good comparator drives the open-drain RESET output.
RESET assertion occurs when VOUT falls below 82.5% of nominal (±1.7% hysteresis), and deasserts after ≥70ms once regulation is achieved. Shutdown mode reduces quiescent current to <1µA, with SHDN input compatible across 1.62V–3.6V logic levels and bias current ≤5nA at +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.00V ±0.5% over load/line/temp - ensures stable core voltage for low-power microcontrollers and ASICs. |
| Max Output Current | 300mA continuous - sufficient for powering baseband processors or memory subsystems in portable devices. |
| Dropout Voltage | 100mV at 300mA - enables operation down to 1.10V input, extending usable battery life in single-cell Li-ion/Li-poly systems. |
| Input Voltage Range | 1.62V to 3.6V - supports direct connection to partially discharged batteries or regulated intermediate rails. |
| RESET Delay | 70ms (min) after VOUT reaches regulation - meets typical µP power-on reset timing requirements without external RC networks. |
| Quiescent Current | 90µA typical at 300mA load - minimizes no-load power loss during system sleep states. |
| PSRR | 70dB @ f < 1kHz - suppresses ripple from noisy switch-mode supplies feeding the LDO input. |
Pinout & Package
MAX1976EZT100 is packaged in a 6-pin thin SOT23-6 (Z6-1) package, height <1.1mm, footprint 2.9mm × 2.8mm. The exposed pad is not present in this variant.
| 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 reduction. |
| 2 (GND) | Ground Reference & Thermal Path | Primary ground return; soldered to PCB ground plane for thermal dissipation and low-impedance return path. |
| 3 (SHDN) | Active-Low Shutdown Control | Logic-low disables regulator, reducing IQ to <1µA; compatible with 1.62V–3.6V logic families. |
| 4 (RESET) | Open-Drain Reset Flag | Asserts low until VOUT stabilizes; remains low for ≥70ms post-regulation - directly interfaces with µP reset inputs. |
| 5 (I.C.) | Internally Connected | No external connection required; leave floating or tie to GND per layout best practices. |
| 6 (OUT) | Regulated Output | Delivers 1.00V @ up to 300mA; requires 4.7µF low-ESR ceramic capacitor to GND for transient stability. |
Key Features
| Feature | Design Value |
|---|---|
| P-Channel MOSFET Pass Transistor | RDS(ON) = 0.33Ω enables low dropout and eliminates base-drive current, reducing quiescent consumption across load range. |
| Integrated RESET Function | Guaranteed 70ms minimum delay ensures reliable microprocessor initialization without external timing components. |
| Thermal & Short-Circuit Protection | Shuts down at +165°C junction temperature with 15°C hysteresis - prevents damage during sustained overload or poor heatsinking. |
| Logic-Controlled Shutdown | SHDN input draws ≤5nA at +85°C, enabling ultra-low-power control via GPIO or PMIC sequencer outputs. |
| Low-Noise Operation | 86µVRMS output noise (10Hz–100kHz) supports noise-sensitive analog circuitry like ADC references or RF bias rails. |
Applications
| Smartphone Baseband Power | Notebook CPU Core Supply |
|---|---|
|
Use Scenario: Powering ARM-based application processors in smartphones during active and idle modes. IC Role / Device Role / Timing Role: Primary 1.00V core LDO with integrated RESET for safe boot sequencing and brownout detection. Use Value: 100mV dropout extends usable battery voltage range; ±0.5% accuracy maintains processor timing margins across temperature. |
Use Scenario: Delivering stable 1.00V to low-power embedded controllers or touchpad ICs in ultrabooks. IC Role / Device Role / Timing Role: Secondary regulated rail generator with shutdown control synchronized to system sleep states. Use Value: 90µA quiescent current minimizes standby power; 70ms RESET delay satisfies Intel ACPI reset timing specifications. |
| Digital Camera Image Sensor Bias | PCMCIA Card Interface Regulator |
|
Use Scenario: Providing clean 1.00V bias to CMOS image sensor analog front-end circuits. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO isolating sensor supply from noisy digital domains. Use Value: 70dB PSRR at low frequencies suppresses switching noise from nearby DC-DC converters; 86µVRMS noise preserves SNR. |
Use Scenario: Regulating 1.00V for PCMCIA card controller logic in legacy industrial data acquisition modules. IC Role / Device Role / Timing Role: Compact, lead-free compliant LDO meeting JEDEC MO-178 thin SOT23 footprint requirements. Use Value: Z6-1 package fits tight board spacing; RESET output enables host-side card presence and power-good signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B102MR-G | 1.0V fixed output, 300mA, 150mV dropout at 300mA, 2.0V–6.0V input range, no integrated RESET. | Lacks RESET function; requires external supervisor IC for power-on reset - increases BOM count and board area. | Select when RESET is handled elsewhere and wider input range (up to 6.0V) is needed for upstream DC-DC stages. |
| Analog Devices ADP125ARHZ-1.0-R7 | 1.0V fixed output, 500mA, 135mV dropout at 300mA, 2.3V–5.5V input, no RESET, higher quiescent current (120µA). | Higher dropout and no RESET limit use in low-VIN battery systems requiring guaranteed reset timing. | Prefer for higher-current loads where 500mA margin is required and RESET is implemented separately. |
Compared with XC6219B102MR-G and ADP125ARHZ-1.0-R7, MAX1976EZT100 uniquely combines 1.62V minimum input, 100mV dropout, ±0.5% accuracy, and integrated 70ms RESET - making it optimal for compact, battery-first designs where timing-critical reset and ultra-low input operation are mandatory.
Availability
MAX1976EZT100 is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, and handheld computing devices requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for MAX1976EZT100 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 power management, analog, and mixed-signal ICs for industrial, automotive, and consumer applications.
The MAX1963/MAX1976 product line was engineered for ultra-low-input-voltage, high-accuracy LDO regulation in portable battery-powered equipment - emphasizing minimal dropout, tight output tolerance, and integrated supervisory functions.
FAQ
What is the output voltage tolerance of the MAX1976EZT100 over temperature and load?
The MAX1976EZT100 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 by production testing at +25°C with design-guaranteed limits across the full operating range.
Does the MAX1976EZT100 require external capacitors, and what values are recommended?
Yes, the MAX1976EZT100 requires a 1µF ceramic capacitor between IN and GND, and a 4.7µF low-ESR ceramic capacitor between OUT and GND. These values ensure stability, transient response, and noise suppression across −40°C to +85°C. ESR must be ≤30mΩ; surface-mount ceramics are preferred for minimal parasitic inductance.
How does the RESET output of the MAX1976EZT100 behave during power-up and brownout?
The MAX1976EZT100 RESET output remains low until VOUT reaches regulation, then stays low for ≥70ms before rising. If VOUT drops below 82.5% of nominal (with 1.7% hysteresis), RESET immediately falls low again. This behavior is fully specified in the RESET Output section and applies across the entire −40°C to +85°C range.
Can the MAX1976EZT100 operate from a single-cell lithium-polymer battery?
Yes - the MAX1976EZT100 operates from 1.62V to 3.6V input, supporting discharge down to ~1.10V output (1.00V + 100mV dropout). This matches the usable voltage range of single-cell Li-poly batteries (typically 4.2V–3.0V fresh, down to ~2.7V nominal, and further into termination), enabling extended runtime.
What thermal protection mechanism does the MAX1976EZT100 implement?
The MAX1976EZT100 incorporates thermal-overload protection that disables the pass transistor when junction temperature exceeds +165°C. After cooling by 15°C, it automatically resumes operation - resulting in pulsed output during sustained overload. This safeguard prevents permanent damage and is documented in the Thermal Protection section of the datasheet.
MAX1976EZT100 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):
- 1V
- 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:
- TSOT-23-6
MAX1976EZT100 FAQ
1.How can I place an order for MAX1976EZT100 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1976EZT100 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 MAX1976EZT100 reliable?
The price and inventory of MAX1976EZT100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1976EZT100 is usually 5 days.
3.What payment methods are accepted for MAX1976EZT100?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1976EZT100 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1976EZT100?
MAX1976EZT100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1976EZT100 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 MAX1976EZT100?
For technical support, including MAX1976EZT100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1976EZT100 requirements.
6.How does Aetrix verify that MAX1976EZT100 is sourced from the original manufacturer or authorized distributors?
All MAX1976EZT100 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 MAX1976EZT100 meets industry standards.
7.What is the process for return or replacement of MAX1976EZT100?
All MAX1976EZT100 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1976EZT100, 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 MAX1976EZT100 part is unused and in its original packaging.
Return procedure for MAX1976EZT100:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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