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Analog Devices Inc./Maxim Integrated MAX1963EZT090+
- Part No.:
- MAX1963EZT090+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MAX1963EZT090+.pdf
- Description:
- IC REG LINEAR 300MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:1,680
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Product details
Overview
MAX1963EZT090+ from Maxim Integrated is a low-dropout linear regulator delivering 300mA continuous output current with ±0.5% output voltage accuracy at 0.90V, 100mV dropout at full load, and active-low open-drain RESET output asserting for ≥2.2ms after regulation. It operates from 1.62V–3.6V input and targets power rails in portable battery-powered systems such as cellular handsets and PDAs.
For engineers reviewing the MAX1963EZT090+ datasheet, MAX1963EZT090+ pinout, MAX1963EZT090+ application, or MAX1963EZT090+ equivalent, key selection criteria include guaranteed 300mA load capability under low-input-voltage conditions (≥1.62V), tight output accuracy over temperature and load, integrated reset timing, thermal/short-circuit protection, and compatibility with 1µF/4.7µF ceramic bypass capacitors.
Technical Context
The MAX1963EZT090+ 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 devices. Its error amplifier compares a trimmed bandgap reference against feedback from an internal voltage divider to regulate the 0.90V output.
RESET functionality is implemented via a dedicated comparator monitoring VOUT; it asserts low when VOUT falls below 82.5% of nominal and deasserts after a fixed 2.2ms delay once regulation is achieved. Shutdown is logic-controlled (active-low SHDN), reducing quiescent current to <1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 0.90V ±0.5% - factory-trimmed, no external resistors required |
| Max Output Current | 300mA continuous - supports core logic or memory rails in handheld devices |
| Dropout Voltage | 100mV at 300mA - enables operation down to 1.0V input for 0.9V output |
| Input Voltage Range | 1.62V to 3.6V - compatible with single Li-ion, Li-poly, or dual NiMH cells |
| RESET Delay | 2.2ms minimum - meets microprocessor power-on reset timing requirements |
| Quiescent Current | 90µA typical at 300mA - minimizes standby power loss in always-on subsystems |
| PSRR | 70dB @ <1kHz - suppresses noise from noisy DC-DC converters upstream |
Pinout & Package
MAX1963EZT090+ is housed in a 6-pin thin SOT23 package (Z6-1 footprint), height <1.1mm, RoHS-compliant and lead-free. 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); Pin 6 is OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input supply | Accepts 1.62V–3.6V; requires ≥1µF ceramic bypass to GND for stability |
| 2 (GND) | Power and signal ground | Serves as thermal heatsink; must connect to large PCB copper area |
| 3 (SHDN) | Active-low shutdown control | Pull low to disable regulator and reduce IQ to <1µA; VIH ≥1.4V, VIL ≤0.6V |
| 4 (RESET) | Open-drain reset flag output | Asserts low during power-up/brownout; requires external pull-up for µP interface |
| 5 (I.C.) | Internally connected node | No functional connection; leave floating or tie to GND per layout best practice |
| 6 (OUT) | Regulated 0.90V output | Supplies 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, enabling stable 90µA quiescent current across load and dropout |
| Factory-trimmed 0.90V output | Removes need for external feedback resistors, saving board space and BOM cost |
| Integrated RESET with 2.2ms delay | Provides deterministic power-on reset timing without external RC network |
| Thermal and short-circuit protection | Shuts down at +165°C junction temp with 15°C hysteresis; limits fault current to 450mA min |
| Low-ESR capacitor compatibility | Stable with 4.7µF ceramic output cap (ESR ≤30mΩ), simplifying high-frequency decoupling |
Applications
| Cellular Handsets | Personal Digital Assistants (PDAs) |
|---|---|
Use Scenario: Powering application processor I/O or memory interface rails in compact GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary LDO supplying stable 0.90V to low-voltage logic domains with fast transient response. Use Value: 100mV dropout extends usable battery life by enabling operation until cell voltage drops to ~1.0V. | Use Scenario: Regulating core voltage for ARM-based PDA SoCs operating at 0.9V. IC Role / Device Role / Timing Role: Main system LDO with integrated RESET ensuring reliable boot sequence after battery insertion. Use Value: ±0.5% accuracy maintains timing margins across temperature; 2.2ms RESET satisfies ARM bootloader requirements. |
| Digital Cameras | PCMCIA Cards |
Use Scenario: Supplying image sensor interface or ISP core voltage in ultra-thin digital cameras. IC Role / Device Role / Timing Role: Compact-area LDO delivering 300mA with minimal board footprint (SOT23-6). Use Value: Thin SOT23 package (<1.1mm height) fits tight mechanical envelopes; low IQ preserves standby time. | Use Scenario: Providing regulated 0.90V to PCMCIA controller ASICs in legacy laptop expansion slots. IC Role / Device Role / Timing Role: Secondary LDO with logic-controlled shutdown for hot-swap power sequencing. Use Value: Active-low SHDN allows host CPU to power down peripheral rail on demand, reducing system idle power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0509PYKAR | 0.9V fixed output, 200mA max, 170mV dropout at 200mA, 5-pin SOT-23 | Lowers max current and increases dropout; lacks RESET output | Select when RESET is unnecessary and 200mA suffices; smaller footprint but lower drive capability |
| MCP1804T-0902I/OT | 0.9V fixed output, 150mA max, 240mV dropout at 150mA, no RESET, 5-pin SOT-23 | Lower current rating, higher dropout, no supervision function | Choose for cost-sensitive, non-critical rails where RESET and 300mA are not required |
Compared with TPS7A0509PYKAR and MCP1804T-0902I/OT, MAX1963EZT090+ uniquely delivers 300mA at 100mV dropout with integrated 2.2ms RESET - making it suitable for higher-performance portable SoC rails where timing integrity and headroom are critical.
Availability
MAX1963EZT090+ is available at Aetrix Electronics and suitable for cellular handsets, PDAs, digital cameras, and PCMCIA cards requiring stable component supply with guaranteed 300mA output, low-input-voltage operation, and integrated power-on reset functionality.
Supply support for MAX1963EZT090+ 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 precision analog, mixed-signal, and power management ICs for demanding industrial, communications, and consumer applications.
The MAX1963 series belongs to Maxim's low-input-voltage LDO family, engineered specifically for battery-powered portable electronics needing high accuracy, ultra-low dropout, and integrated supervisory functions in minimal footprints.
FAQ
What is the output voltage tolerance of the MAX1963EZT090+ over temperature and load?
The MAX1963EZT090+ guarantees ±0.5% output voltage accuracy across -40°C to +85°C, 1mA–300mA load, and 1.62V–3.6V input range. This is achieved via factory laser trimming of the internal reference and feedback network - no external components affect this spec. The MAX1963EZT090+ datasheet confirms this value in the Electrical Characteristics table under "Output Voltage Accuracy".
Does the MAX1963EZT090+ require external capacitors, and what values are recommended?
Yes, the MAX1963EZT090+ requires two ceramic capacitors: a 1µF capacitor between IN and GND, and a 4.7µF low-ESR (≤30mΩ) capacitor between OUT and GND. These values ensure stability across temperature and load, optimize transient response, and meet PSRR specifications. Larger output capacitance improves noise suppression but does not alter regulation behavior.
How does the RESET output of the MAX1963EZT090+ behave during power-up and brownout?
The RESET output of the MAX1963EZT090+ is an active-low open-drain signal that remains asserted (low) until the output reaches 96% of 0.90V and stays regulated for ≥2.2ms. If VOUT drops below 82.5% of nominal (0.7425V), RESET immediately pulls low again. During shutdown (SHDN = low), RESET is also actively driven low - providing consistent fault signaling.
Can the MAX1963EZT090+ be used with input voltages below 1.62V?
No - the MAX1963EZT090+ has a specified minimum input voltage of 1.62V. Below this, undervoltage lockout (UVLO) activates, disabling regulation and pulling RESET low. The UVLO threshold is 1.30V–1.60V with ~180mV hysteresis. Operating below 1.62V violates Absolute Maximum Ratings and results in undefined behavior or complete shutdown.
What thermal protection features does the MAX1963EZT090+ include?
The MAX1963EZT090+ incorporates thermal-overload protection that disables the pass transistor when junction temperature exceeds +165°C. After cooling by 15°C (to ~+150°C), the device automatically recovers. This cycle repeats under sustained overload, preventing permanent damage. The SOT23 package's thermal resistance (θJA) and PCB copper area directly impact safe continuous current - see Figure 2 in the datasheet for derating curves.
MAX1963EZT090+ 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):
- -
- 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
MAX1963EZT090+ FAQ
1.How can I place an order for MAX1963EZT090+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1963EZT090+ 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+ reliable?
The price and inventory of MAX1963EZT090+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1963EZT090+ is usually 5 days.
3.What payment methods are accepted for MAX1963EZT090+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1963EZT090+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1963EZT090+?
MAX1963EZT090+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1963EZT090+ 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+?
For technical support, including MAX1963EZT090+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1963EZT090+ requirements.
6.How does Aetrix verify that MAX1963EZT090+ is sourced from the original manufacturer or authorized distributors?
All MAX1963EZT090+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX1963EZT090+?
All MAX1963EZT090+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1963EZT090+, 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+ part is unused and in its original packaging.
Return procedure for MAX1963EZT090+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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