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Analog Devices Inc./Maxim Integrated MAX1963EZT090+T
- Part No.:
- MAX1963EZT090+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MAX1963EZT090+T.pdf
- Description:
- IC REG LINEAR 300MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:17,500
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Product details
Overview
MAX1963EZT090+T from Maxim Integrated is a low-dropout linear regulator (LDO) delivering 300mA continuous output current with ±0.5% initial accuracy, 100mV dropout at full load, and a fixed 0.90V output voltage. It operates from a 1.62V–3.6V input supply and integrates an active-low open-drain RESET output with 2.2ms delay, making it suitable for powering core logic rails in space-constrained portable devices.
For engineers reviewing the MAX1963EZT090+T datasheet, MAX1963EZT090+T pinout, MAX1963EZT090+T application, or MAX1963EZT090+T equivalent, key selection criteria include its ultra-low input voltage capability, guaranteed dropout performance at 300mA, integrated reset timing, thermal shutdown behavior, and compatibility with ceramic output capacitors down to 4.7µF.
Technical Context
The MAX1963EZT090+T uses an internal P-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) to achieve load-independent quiescent current (90µA typ) and low dropout across temperature. Its error amplifier compares a trimmed bandgap reference against a fixed internal feedback divider to regulate the 0.90V output without external resistors.
RESET assertion is triggered when VOUT falls below 82.5% of nominal (0.7425V), and deasserts after a guaranteed 2.2ms delay once regulation is achieved. Shutdown is controlled via an active-low SHDN pin that reduces supply current to <1µA and actively pulls OUT to GND through a 1.5kΩ resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.90V ±0.5% (initial accuracy); no external feedback required |
| Max Output Current | 300mA continuous; current limit starts at 450mA min to prevent damage |
| Dropout Voltage | 100mV at 300mA load (VIN ≥ VOUT + 0.5V); enables operation near battery end-of-life |
| Input Voltage Range | 1.62V to 3.6V; supports single-cell Li-ion, Li-polymer, and multi-cell alkaline systems |
| RESET Delay | 2.2ms (min) after VOUT reaches regulation; ensures reliable microprocessor power-up sequencing |
| Quiescent Current | 90µA typical at 300mA load and in dropout; independent of load or VIN–VOUT differential |
| Thermal Shutdown | Activates at +165°C junction temperature with 15°C hysteresis; prevents permanent damage during overload |
Pinout & Package
MAX1963EZT090+T is housed in a 6-pin thin SOT23 package (Z6-1 footprint, 2.9mm × 2.8mm × 1.1mm max height), optimized for high-density PCB layouts in portable electronics. The exposed pad is absent - only standard SOT23 leads are present.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN | Regulator input; requires ≥1µF ceramic bypass to GND; accepts 1.62V–3.6V supply |
| 2 | GND | Power and signal ground; serves as primary thermal path in SOT23 package |
| 3 | SHDN | Active-low shutdown control; logic low (<0.6V) disables regulator and reduces IQ to <1µA |
| 4 | RESET | Open-drain active-low reset flag; asserts when VOUT < 82.5% of 0.90V (0.7425V) |
| 5 | I.C. | Internally connected node; must be left floating or tied to GND (no external connection) |
| 6 | OUT | Regulated 0.90V output; sources up to 300mA; requires 4.7µF low-ESR ceramic capacitor to GND |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current; enables 90µA quiescent current even at full 300mA load and in dropout |
| Integrated RESET with precision threshold | 82.5% VOUT detection (±2.5% threshold accuracy) and 2.2ms minimum delay ensure robust µP reset timing |
| Logic-controlled shutdown | SHDN pin pulls OUT to GND via 1.5kΩ resistor during shutdown, preventing floating rail issues |
| Thermal-overload protection | Auto-cycling shutdown at +165°C with 15°C hysteresis protects device under sustained overloads |
| Stable with low-ESR ceramics | Guaranteed stability with 4.7µF output capacitor and ESR ≤30mΩ; simplifies BOM and layout |
Applications
| Mobile Application Processor Core Rail | Low-Voltage FPGA I/O Bank Supply |
|---|---|
|
Use Scenario: Powering the 0.9V core rail of an application processor in a smartphone or tablet during active and sleep modes. IC Role / Device Role / Timing Role: Primary LDO delivering tightly regulated 0.90V at up to 300mA; RESET signals SoC boot readiness after power stabilization. Use Value: Enables use of single-cell batteries down to 1.62V input while maintaining ±0.5% output accuracy and fast transient response to CPU load steps. |
Use Scenario: Supplying configurable I/O banks on a low-power FPGA where voltage margining and sequencing are critical. IC Role / Device Role / Timing Role: Fixed-output LDO providing clean 0.90V with integrated RESET to coordinate FPGA configuration timing with system power-up. Use Value: Eliminates need for external feedback resistors and discrete reset IC, reducing component count and board area in tight BGA footprints. |
| Wearable Sensor Hub Power | Ultra-Low-Power MCU Subsystem Rail |
|
Use Scenario: Delivering stable 0.90V to an always-on sensor fusion hub in a hearable or fitness tracker. IC Role / Device Role / Timing Role: Always-active LDO with <1µA shutdown current and 2.2ms RESET delay to support rapid wake-from-sleep transitions. Use Value: Maintains 90µA quiescent current across full load range and dropout, extending battery life in multi-week wearable deployments. |
Use Scenario: Powering the core logic of an ARM Cortex-M0+ microcontroller operating from a coin cell or energy-harvested source. IC Role / Device Role / Timing Role: Input-efficient LDO enabling operation from 1.62V sources; RESET output synchronizes bootloader execution with rail stability. Use Value: Supports direct connection to single alkaline/coin cells without pre-regulation, reducing bill-of-materials and power conversion losses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B092MR-G | 0.9V fixed output, 300mA, 150mV dropout at 300mA, no integrated RESET | Lacks active-low RESET output; requires external supervisor IC for power sequencing | Select when RESET functionality is handled elsewhere and lower cost is prioritized over integration |
| Analog Devices ADP125ARHZ-0.9-R7 | 0.9V fixed output, 500mA, 135mV dropout at 300mA, no RESET, higher IQ (120µA) | Higher current rating but no built-in reset; larger 6-lead SOT-23-6 footprint with different pinout | Select when future headroom beyond 300mA is needed and board layout allows rework for non-pin-compatible placement |
Compared with XC6219B092MR-G and ADP125ARHZ-0.9-R7, the MAX1963EZT090+T uniquely combines 0.90V regulation, 300mA delivery, sub-100mV dropout, and integrated 2.2ms RESET in a standard thin SOT23 - offering superior integration for compact, battery-powered systems requiring coordinated power-up timing.
Availability
MAX1963EZT090+T is available at Aetrix Electronics and suitable for notebook computers, cellular handsets, and portable medical monitors requiring stable component supply with RoHS-compliant packaging and guaranteed long-term availability.
Supply support for MAX1963EZT090+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, interface, sensing, and RF applications.
The MAX1963 series belongs to Maxim's low-input-voltage LDO family, engineered specifically for battery-powered portable electronics where minimal input voltage, precise low-voltage regulation, and integrated power-good signaling are essential.
FAQ
What is the exact output voltage tolerance of the MAX1963EZT090+T over temperature and load?
The MAX1963EZT090+T guarantees ±0.5% output voltage accuracy over load (1mA–300mA), line (VIN = VOUT + 0.5V to +3.6V), and temperature (–40°C to +85°C). This is confirmed in the Electrical Characteristics table under "Output Voltage Accuracy" with test conditions explicitly covering all three variables. The ±0.5% spec applies directly to the MAX1963EZT090+T, not the broader MAX1963 family.
Does the MAX1963EZT090+T require external feedback resistors to set its 0.90V output?
No - the MAX1963EZT090+T has a factory-trimmed internal feedback network that fixes the output at 0.90V. No external resistors are needed, simplifying design and improving accuracy by eliminating resistor tolerance and layout parasitics. This is confirmed in the "Detailed Description" section and Selector Guide, which lists "090" as the suffix for the 0.90V variant of MAX1963EZT090+T.
How does the RESET output behave during shutdown of the MAX1963EZT090+T?
When SHDN is pulled low, the MAX1963EZT090+T actively pulls the RESET pin low immediately - independent of output voltage level. This behavior is specified in the Pin Description: "RESET falls immediately if VOUT drops below 82.5% of its nominal voltage, or if the MAX1963/MAX1976 are shut down." Thus, RESET provides a synchronized shutdown signal alongside the regulated output disable.
Can the MAX1963EZT090+T operate from a 1.5V input supply?
No - the absolute minimum input voltage for regulation is 1.62V, as stated in the Absolute Maximum Ratings and General Description. At 1.5V input, the MAX1963EZT090+T will not regulate; its undervoltage lockout (UVLO) activates below ~1.60V (typical 1.30V–1.60V range), disabling regulation and asserting RESET. Operation below 1.62V violates the specified operating condition.
What is the thermal resistance (θJA) of the MAX1963EZT090+T in its thin SOT23 package?
The datasheet does not publish θJA for the MAX1963EZT090+T's Z6-1 thin SOT23 package. Instead, it specifies power dissipation limits: 727mW at TA = +70°C with 9.1mW/°C derating above that. Thermal performance depends entirely on PCB copper area connected to pins 2 (GND) and 5 (I.C.), per the "Pin Description" guidance to solder GND to a large pad or ground plane. No θJA value is provided or implied for this variant.
MAX1963EZT090+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):
- 0.9V
- 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
MAX1963EZT090+T FAQ
1.How can I place an order for MAX1963EZT090+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1963EZT090+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 MAX1963EZT090+T reliable?
The price and inventory of MAX1963EZT090+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1963EZT090+T is usually 5 days.
3.What payment methods are accepted for MAX1963EZT090+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1963EZT090+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1963EZT090+T?
MAX1963EZT090+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1963EZT090+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 MAX1963EZT090+T?
For technical support, including MAX1963EZT090+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1963EZT090+T requirements.
6.How does Aetrix verify that MAX1963EZT090+T is sourced from the original manufacturer or authorized distributors?
All MAX1963EZT090+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 MAX1963EZT090+T meets industry standards.
7.What is the process for return or replacement of MAX1963EZT090+T?
All MAX1963EZT090+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1963EZT090+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 MAX1963EZT090+T part is unused and in its original packaging.
Return procedure for MAX1963EZT090+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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