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Analog Devices Inc./Maxim Integrated MAX1963ETT250+
- Part No.:
- MAX1963ETT250+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX1963ETT250+.pdf
- Description:
- IC REG LINEAR 300MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:1,393
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Product details
Overview
MAX1963ETT250+ from Maxim Integrated is a low-dropout linear regulator (LDO) with integrated active-low reset output, designed for battery-powered portable electronics. It delivers 300mA continuous output current with ±0.5% output voltage accuracy at 2.50V, 100mV dropout at full load, and operates from a 1.62V–3.6V input supply - enabling operation down to single-cell Li-ion or NiMH end-of-life voltage. It is used in power rails for microcontrollers and RF sections in compact handheld devices.
For engineers reviewing the MAX1963ETT250+ datasheet, MAX1963ETT250+ pinout, MAX1963ETT250+ application, or MAX1963ETT250+ equivalent, key selection criteria include guaranteed 300mA output under 100mV dropout, 2.2ms reset delay timing, thermal-overload protection, logic-controlled shutdown, and compatibility with low-ESR ceramic capacitors (1µF IN / 4.7µF OUT).
Technical Context
The MAX1963ETT250+ uses an internal P-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) to achieve load-independent quiescent current (90µA typ) and low dropout performance. Its error amplifier compares a trimmed bandgap reference against a resistive feedback network to regulate the 2.50V output with ±0.5% accuracy over load, line, and temperature.
It integrates a dedicated power-good comparator that asserts the open-drain RESET signal when VOUT falls below 82.5% of nominal (2.06V), holding it asserted for ≥2.2ms after regulation is achieved. Shutdown control is implemented via an active-low SHDN pin with <1µA off-state current and 90µs turn-on delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.50V fixed, internally trimmed - eliminates external resistor network and saves PCB space in space-constrained designs. |
| Max Output Current | 300mA continuous - sufficient for powering core logic or RF ICs in portable systems without requiring parallel regulators. |
| Dropout Voltage | 100mV at 300mA - enables >95% efficiency at light-to-moderate loads and extends usable battery life in 1.8V–3.6V input systems. |
| Output Accuracy | ±0.5% over load/line/temp - ensures stable MCU core voltage or analog sensor biasing without calibration overhead. |
| Reset Delay | 2.2ms (min) after VOUT reaches regulation - meets typical µP power-on reset timing requirements without external RC networks. |
| Quiescent Current | 90µA typical at 300mA load - remains constant across dropout conditions, critical for standby power budgeting in always-on subsystems. |
| Input Voltage Range | 1.62V to 3.6V - supports single-cell Li-ion (2.7–4.2V), LiFePO4, or dual-cell NiMH batteries throughout discharge cycle. |
Pinout & Package
MAX1963ETT250+ is housed in a 6-pin 3mm × 3mm thin DFN package (pkg code T633-2), with exposed paddle (EP) for thermal dissipation. The package height is <0.8mm, suitable for ultra-thin portable assemblies.
| 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 suppression. |
| 2 (GND) | Ground reference & thermal path | Primary ground return; EP pad must be soldered to large copper area for thermal management and EMI reduction. |
| 3 (SHDN) | Active-low shutdown control | Pull low to reduce supply current to <1µA; high-impedance input with <5nA bias current enables direct GPIO interfacing. |
| 4 (RESET) | Open-drain reset flag | Asserts low during power-up/brownout; rises 2.2ms after VOUT stabilizes - connects to µP reset pin with pull-up resistor. |
| 5 (I.C.) | Internally connected | No external connection required; leave floating or tie to GND per layout best practices to minimize noise coupling. |
| 6 (OUT) | Regulated output | Delivers 2.50V @ up to 300mA; requires 4.7µF low-ESR (<30mΩ) ceramic capacitor to GND for transient response and PSRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Low-input-voltage operation | Starts regulation at 1.62V input - supports deep-discharge battery operation and enables use with energy-harvesting sources. |
| Thermal-overload protection | Shuts down at +165°C junction temp with 15°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| Short-circuit protection | Current limit threshold ≥450mA - maintains safe operation during output faults without latch-up or external current-sense circuitry. |
| Supply-current independence | Ground current remains ~90µA regardless of load or dropout - simplifies battery life estimation and eliminates load-dependent quiescent drift. |
| Logic-compatible shutdown | SHDN accepts 0.6V/1.4V logic thresholds across full VIN range - interoperable with 1.8V, 2.5V, and 3.3V I/O domains without level shifters. |
Applications
| Smartphone Baseband Power | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Powers baseband processor core rail in LTE smartphones where input voltage varies from 3.4V (fresh battery) to 2.8V (low charge). IC Role / Device Role / Timing Role: Primary 2.50V LDO delivering regulated supply with fast load-transient response to handle burst-mode processing. Use Value: 100mV dropout preserves >92% efficiency at 2.8V input; 2.2ms RESET ensures reliable boot sequencing before baseband firmware execution. |
Use Scenario: Supplies image sensor analog front-end (AFE) in compact digital cameras requiring low-noise, stable 2.50V bias. IC Role / Device Role / Timing Role: Low-noise LDO with 86µVRMS output noise and 70dB PSRR @ <1kHz to prevent sensor pattern noise. Use Value: Fixed 2.50V output eliminates trimming components; 4.7µF ceramic output cap ensures <20mV load-step overshoot for clean pixel readout. |
| Wearable BLE SoC Core Rail | PCMCIA Card Interface Regulator |
Use Scenario: Provides 2.50V core voltage to Bluetooth Low Energy SoC in hearables, operating from a 3.0V coin cell with tight space constraints. IC Role / Device Role / Timing Role: Ultra-thin DFN regulator with <0.8mm height and integrated RESET for cold-start reliability. Use Value: 3mm × 3mm footprint fits within 10mm² board area; shutdown current <1µA extends shelf life and enables zero-power wake-on-RF. |
Use Scenario: Generates 2.50V interface voltage for PCMCIA Type II cards in industrial data loggers with hot-swap capability. IC Role / Device Role / Timing Role: Fault-tolerant LDO with short-circuit and thermal protection to survive card insertion transients and reverse-voltage events. Use Value: 450mA current limit handles inrush during card insertion; RESET assertion during brownout prevents corrupted memory writes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B252MR-G | 2.5V fixed output, 200mA max, 150mV dropout at 200mA, no integrated RESET | Lacks reset functionality; requires external supervisor IC for power-on sequencing | Choose when lower cost and smaller footprint (SOT-25) are prioritized over integrated reset and higher current capability |
| Analog Devices ADP160ACBZ-2.5-R7 | 2.5V fixed output, 150mA max, 195mV dropout at 150mA, no RESET, 1.8V min input | Lower current rating and no reset output; optimized for ultra-low IQ (650nA) rather than high-load performance | Prefer for always-on sensor nodes where sub-µA shutdown current outweighs need for 300mA delivery or reset signaling |
Compared with XC6219B252MR-G and ADP160ACBZ-2.5-R7, MAX1963ETT250+ uniquely combines 300mA delivery, 100mV dropout, and integrated 2.2ms-reset in a 3mm × 3mm DFN - making it optimal for space-constrained, battery-powered systems requiring robust power sequencing without added components.
Availability
MAX1963ETT250+ is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, and digital cameras requiring stable component supply with RoHS-compliant, lead-free packaging and guaranteed 2.50V output accuracy.
Supply support for MAX1963ETT250+ 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 series belongs to Maxim's low-input-voltage LDO family, engineered specifically for portable battery-powered equipment where extended runtime, small size, and integrated power supervision are critical design requirements.
FAQ
What is the output voltage tolerance of the MAX1963ETT250+ over temperature and load?
The MAX1963ETT250+ guarantees ±0.5% output voltage accuracy across -40°C to +85°C, 1mA to 300mA load, and 1.8V to 3.6V input voltage. This specification is confirmed in the Electrical Characteristics table (page 2 of datasheet) and verified by production testing at +25°C with design-guaranteed limits over full operating range.
Does the MAX1963ETT250+ require external components for stable operation?
Yes - the MAX1963ETT250+ requires a 1µF ceramic capacitor between IN and GND, and a 4.7µF low-ESR (<30mΩ) ceramic capacitor between OUT and GND. These are mandatory for stability, transient response, and PSRR performance per the Capacitor Selection section (page 7 of datasheet). No additional compensation components are needed.
How does the RESET output behave during input undervoltage or shutdown?
The RESET output of the MAX1963ETT250+ is actively pulled low during power-up until VOUT reaches 82.5% of 2.50V (2.06V), then remains asserted for ≥2.2ms. It also falls immediately if VOUT drops below threshold or if SHDN is pulled low - ensuring reliable reset assertion during brownout and controlled shutdown sequences.
What thermal protection features does the MAX1963ETT250+ include?
The MAX1963ETT250+ incorporates thermal-overload protection that disables the pass transistor when junction temperature exceeds +165°C, with 15°C hysteresis. This prevents permanent damage during sustained overload or inadequate heatsinking. The device resumes normal operation only after cooling below +150°C, producing pulsed output during continuous fault conditions.
Can the MAX1963ETT250+ operate from a 1.8V input while delivering 2.50V output?
No - the MAX1963ETT250+ cannot regulate 2.50V output from a 1.8V input because its minimum input voltage must exceed the output voltage by the dropout voltage (≥100mV at 300mA). For 2.50V output, minimum valid input is 2.60V. Operation below this violates regulation and causes output collapse, as defined in the Absolute Maximum Ratings and Dropout Voltage specifications.
MAX1963ETT250+ 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):
- 2.5V
- 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:
- 6-TDFN-EP (3x3)
MAX1963ETT250+ FAQ
1.How can I place an order for MAX1963ETT250+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1963ETT250+ 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 MAX1963ETT250+ reliable?
The price and inventory of MAX1963ETT250+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1963ETT250+ is usually 5 days.
3.What payment methods are accepted for MAX1963ETT250+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1963ETT250+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1963ETT250+?
MAX1963ETT250+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1963ETT250+ 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 MAX1963ETT250+?
For technical support, including MAX1963ETT250+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1963ETT250+ requirements.
6.How does Aetrix verify that MAX1963ETT250+ is sourced from the original manufacturer or authorized distributors?
All MAX1963ETT250+ 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 MAX1963ETT250+ meets industry standards.
7.What is the process for return or replacement of MAX1963ETT250+?
All MAX1963ETT250+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1963ETT250+, 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 MAX1963ETT250+ part is unused and in its original packaging.
Return procedure for MAX1963ETT250+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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