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Analog Devices Inc./Maxim Integrated MAX1589EZT300+T
- Part No.:
- MAX1589EZT300+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MAX1589EZT300+T.pdf
- Description:
- IC REG LINEAR 3V 500MA TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,379
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Product details
Overview
MAX1589EZT300+T from Maxim Integrated is a low-dropout linear regulator with integrated reset output, designed for battery-powered portable electronics. It delivers 500mA continuous output current at 3.0V with ±0.5% initial accuracy, 175mV dropout at full load, and operates from 1.62V to 3.6V input-enabling operation down to single-cell Li-ion or Li-poly end-of-discharge voltages in notebook computers and digital still cameras.
For engineers reviewing the MAX1589EZT300+T datasheet, MAX1589EZT300+T pinout, MAX1589EZT300+T application, or MAX1589EZT300+T equivalent, key selection criteria include guaranteed 500mA load capability under low-input-voltage conditions, active-low open-drain RESET timing (≥70ms delay), logic-controlled shutdown (<1µA off-state current), thermal-overload protection, and compatibility with 1µF/4.7µF ceramic bypass networks.
Technical Context
The MAX1589EZT300+T uses an internal P-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) to achieve low dropout and supply current independent of load or dropout voltage. Its error amplifier compares a trimmed bandgap reference against a fixed internal feedback divider to regulate the 3.0V output.
RESET functionality is implemented via a dedicated power-good comparator monitoring VOUT, asserting active-low open-drain output when VOUT falls below 82.5% of nominal (2.475V), with ≥70ms delay on power-up and immediate deassertion on brownout or shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V (factory-trimmed, no external resistors required) |
| Max Output Current | 500mA continuous-supports core logic rails in portable SoC systems |
| Dropout Voltage | 175mV at 500mA-enables >3.0V output from 3.175V input, extending battery runtime |
| Output Accuracy | ±0.5% initial tolerance-meets tight regulation requirements for DSPs and memory I/O |
| Reset Threshold | 82.5% of VOUT (2.475V) with 1.7% hysteresis-ensures clean µP reset during brownout |
| Quiescent Current | 90µA typical at 500mA load-minimizes standby drain in always-on subsystems |
| Shutdown Current | <1µA-critical for long-term storage or sleep-mode power budgeting |
Pinout & Package
MAX1589EZT300+T is packaged in a 6-pin thin SOT23 (1.1mm height) with exposed pad not present; pin 5 is internally connected (I.C.) and must be left floating or tied to GND per layout guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN | Regulator input (1.62V–3.6V); requires ≥1µF ceramic bypass to GND |
| 2 | GND | Power ground and thermal path; solder to large copper area for heat dissipation |
| 3 | SHDN | Active-low shutdown control; <0.6V disables regulator and pulls RESET low |
| 4 | RESET | Open-drain active-low reset flag; pulled low until VOUT stable ≥70ms |
| 5 | I.C. | Internally connected node; leave floating or connect to GND per layout guidelines |
| 6 | OUT | 3.0V regulated output (500mA max); requires 4.7µF low-ESR ceramic capacitor to GND |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss; enables 90µA quiescent current even at 500mA load and in dropout |
| Logic-controlled shutdown | Reduces total system supply current to <1µA-essential for battery-backed real-time clocks and sensors |
| Integrated RESET with timing | Guarantees ≥70ms reset assertion after power-up, meeting Intel/ARM processor reset timing requirements |
| Thermal-overload protection | Shuts down at +165°C junction temperature with 15°C hysteresis-prevents permanent damage during sustained overload |
| Short-circuit protection | Limits output current to 850mA typ; prevents catastrophic failure during PCB trace shorts or connector faults |
Applications
| Notebook Computers | Digital Still Cameras |
|---|---|
Use Scenario: Powering image sensor interface circuitry and ISP cores during burst capture mode. IC Role / Device Role / Timing Role: Primary 3.0V LDO supplying high-speed parallel data paths between CMOS sensor and baseband processor. Use Value: Low 175mV dropout preserves battery life across full discharge curve; RESET ensures clean boot after cold start from depleted Li-ion cell. | Use Scenario: Regulating power to flash memory controllers and SD card interface logic during write operations. IC Role / Device Role / Timing Role: Stable 3.0V rail generator with precise reset timing to prevent file corruption during sudden power loss. Use Value: ±0.5% output accuracy maintains NAND I/O voltage compliance; 70ms RESET delay satisfies JEDEC SD specification tRST minimum. |
| Cellular Telephones | PCMCIA Cards |
Use Scenario: Supplying RF transceiver bias and baseband analog front-end circuits in dual-mode GSM/UMTS handsets. IC Role / Device Role / Timing Role: Low-noise 3.0V LDO with high PSRR (>70dB @ 1kHz) isolating sensitive RF sections from noisy digital supplies. Use Value: 86µVRMS output noise and 70dB PSRR suppress switching noise from PMIC DC-DC converters, preserving receiver sensitivity. | Use Scenario: Providing regulated 3.0V to PC Card controller ASICs during hot-insertion and enumeration sequences. IC Role / Device Role / Timing Role: Reset-aware power rail ensuring proper initialization of CardBus bridge logic before host enumeration. Use Value: Active-low open-drain RESET synchronizes with host-side reset controllers; SHDN pin allows dynamic rail disable during card ejection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator with reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79530DRBR | 3.0V fixed output, 500mA, but requires ≥2.7V input; no integrated RESET output | Requires external reset IC or µC GPIO monitoring for power-good signaling | Choose when board space permits discrete reset implementation and input voltage stays >2.7V |
| MCP1825-3002E/DB | 3.0V fixed output, 500mA, 250mV dropout at 500mA; includes RESET but with 200ms min delay | Longer reset timeout may delay system boot in time-critical embedded applications | Prefer when extended reset hold time improves reliability in noisy power environments |
Compared with TPS79530DRBR and MCP1825-3002E/DB, the MAX1589EZT300+T uniquely combines ultra-low 1.62V minimum input, 175mV dropout, and factory-trimmed 70ms RESET in a 6-pin SOT23-enabling direct replacement in space-constrained, single-cell battery designs without redesigning reset timing or adding components.
Availability
MAX1589EZT300+T is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, and digital still cameras requiring stable component supply across extended production lifecycles and varying battery chemistries.
Supply support for MAX1589EZT300+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 precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and portable applications.
The MAX1589 series was developed specifically for low-input-voltage, high-current LDO regulation in battery-powered portable equipment-emphasizing minimal dropout, ultra-low quiescent current, and integrated supervisory functions like RESET.
FAQ
What is the exact output voltage and tolerance of the MAX1589EZT300+T?
The MAX1589EZT300+T provides a factory-trimmed fixed output voltage of 3.0V with ±0.5% initial accuracy over temperature and load. This tolerance is guaranteed at +25°C and maintained within ±1.5% across the full -40°C to +85°C operating range, as confirmed in the Electrical Characteristics table of the official datasheet.
Does the MAX1589EZT300+T require external resistors to set its output voltage?
No, the MAX1589EZT300+T does not require external resistors. Its 3.0V output is internally trimmed and fixed-indicated by the "300" suffix in the part number. The device uses an internal feedback divider, eliminating resistor placement, layout area, and tolerance-induced regulation errors.
What is the function of Pin 5 (I.C.) on the MAX1589EZT300+T?
Pin 5 on the MAX1589EZT300+T is labeled "I.C." (Internally Connected) and serves no external circuit function. Per the Pin Description section, it may be left floating or connected to GND-no performance difference is specified, and no internal signal is routed to this terminal.
How does the RESET output behave during shutdown of the MAX1589EZT300+T?
When SHDN is pulled low, the MAX1589EZT300+T enters shutdown mode and actively pulls the RESET pin low-regardless of output voltage level. This behavior ensures deterministic reset assertion during controlled power-down sequences, supporting orderly firmware save and state retention in microcontrollers.
Can the MAX1589EZT300+T operate from a single alkaline cell?
No, the MAX1589EZT300+T cannot reliably operate from a single alkaline cell. Its minimum input voltage is 1.62V, while a fresh alkaline cell starts at ~1.6V and drops rapidly under load. It is designed for single Li-ion/Li-poly cells (nominal 3.7V, discharge to ~2.8V) or dual NiMH/NiCd cells (2.4V–3.0V), where the 1.62V–3.6V input range is fully utilized.
MAX1589EZT300+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 3.6V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.35V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 140 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable, Reset
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
MAX1589EZT300+T FAQ
1.How can I place an order for MAX1589EZT300+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1589EZT300+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 MAX1589EZT300+T reliable?
The price and inventory of MAX1589EZT300+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1589EZT300+T is usually 5 days.
3.What payment methods are accepted for MAX1589EZT300+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1589EZT300+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1589EZT300+T?
MAX1589EZT300+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1589EZT300+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 MAX1589EZT300+T?
For technical support, including MAX1589EZT300+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1589EZT300+T requirements.
6.How does Aetrix verify that MAX1589EZT300+T is sourced from the original manufacturer or authorized distributors?
All MAX1589EZT300+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 MAX1589EZT300+T meets industry standards.
7.What is the process for return or replacement of MAX1589EZT300+T?
All MAX1589EZT300+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1589EZT300+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 MAX1589EZT300+T part is unused and in its original packaging.
Return procedure for MAX1589EZT300+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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