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Analog Devices Inc./Maxim Integrated MAX1589ETT250
- Part No.:
- MAX1589ETT250
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX1589ETT250.pdf
- Description:
- IC REG LINEAR 500MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:449
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Product details
Overview
MAX1589ETT250 from Maxim Integrated is a low-dropout linear regulator with preset 2.5V output, delivering 500mA continuous load current at ≤175mV dropout from 1.62V–3.6V input. It integrates an active-low open-drain RESET output with 70ms delay and operates in -40°C to +85°C for portable power rails in notebook computers and digital still cameras.
For engineers reviewing the MAX1589ETT250 datasheet, MAX1589ETT250 pinout, MAX1589ETT250 application, or MAX1589ETT250 equivalent, key selection criteria include guaranteed 500mA output under low-input-voltage conditions (≥1.62V), ±0.5% initial output accuracy, thermal-overload protection, and compatibility with 4.7µF low-ESR ceramic output capacitance.
Technical Context
The MAX1589ETT250 uses an internal P-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) enabling low quiescent current (90µA typ at 500mA) independent of load and dropout voltage. Its error amplifier compares a precision reference against internal feedback to regulate output voltage.
RESET functionality is implemented via a power-good comparator monitoring VOUT; it asserts low when VOUT falls below 82.5% of nominal and remains asserted ≥70ms after regulation is restored. Shutdown is logic-controlled (active-low SHDN), reducing supply current to <1µA while pulling OUT to GND via a 1.5kΩ resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V, internally trimmed - eliminates external resistor network and improves long-term stability. |
| Max Output Current | 500mA continuous - supports core logic rails in portable systems without derating at full ambient temperature. |
| Dropout Voltage | 175mV at 500mA - enables operation down to 2.675V input for 2.5V rail, extending battery life in single-cell Li-ion applications. |
| Output Accuracy | ±0.5% initial (25°C), ±1.5% over -40°C to +85°C - ensures reliable microprocessor core voltage compliance. |
| RESET Delay | 70ms minimum assertion time - meets standard µP reset timing requirements for clean boot sequencing. |
| Quiescent Current | 90µA typical at 500mA load - maintains ultra-low standby power even under heavy load, critical for always-on subsystems. |
| Input Voltage Range | 1.62V to 3.6V - supports direct connection to single-cell Li-ion (2.7–4.2V) with headroom for aging and discharge. |
Pinout & Package
MAX1589ETT250 is housed in a 6-pin 3mm × 3mm thin DFN package with exposed thermal pad (EP), height <0.8mm. The package supports high-power dissipation (1.951W at +70°C) and requires soldering EP to PCB ground plane for thermal management.
| 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. |
| 2 (GND) | Ground reference & heatsink | Primary ground return; must be connected to large copper area for thermal conduction. |
| 3 (SHDN) | Active-low shutdown control | Pull low to disable regulator; draws <1µA and actively discharges OUT via 1.5kΩ to GND. |
| 4 (RESET) | Active-low open-drain reset flag | Asserts low during power-up/brownout; requires external pull-up for µP interface. |
| 5 (I.C.) | Internally connected | No external connection required; may be left floating or tied to GND per layout best practice. |
| 6 (OUT) | Regulated 2.5V output | Sources up to 500mA; requires 4.7µF low-ESR ceramic capacitor to GND for stability. |
| EP (Exposed Pad) | Thermal ground & mechanical anchor | Must be soldered to PCB ground plane to achieve rated power dissipation and junction temperature limits. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss, enabling 90µA quiescent current even at full 500mA load and in dropout. |
| Logic-controlled shutdown | Reduces total supply current to <1µA while safely discharging output and asserting RESET. |
| Integrated RESET supervisor | Guarantees 70ms minimum reset pulse width and responds to brownout down to 1.0V input. |
| Thermal-overload protection | Shuts down pass transistor at +165°C junction temperature with 15°C hysteresis to prevent damage during sustained overload. |
| Short-circuit protection | Limits output current to 850mA typical, preventing catastrophic failure during output fault conditions. |
Applications
| Notebook Computers | Digital Still Cameras |
|---|---|
Use Scenario: Powering image sensor I/O or ISP core voltage in compact, battery-operated DSLR/mirrorless cameras. IC Role / Device Role / Timing Role: Primary 2.5V LDO supplying noise-sensitive analog front-end circuitry with tight DC accuracy. Use Value: 86µVRMS output noise and 70dB PSRR at 1kHz ensure minimal interference with ADC sampling and image quality. | Use Scenario: Regulating 2.5V supply for memory card interface (SD/CF) controllers in portable imaging devices. IC Role / Device Role / Timing Role: Stable, low-noise power source for high-speed digital I/O with fast load-transient response. Use Value: 35mV typical load-step overshoot (100mA→500mA) and 20µs recovery maintain signal integrity during burst write operations. |
| Cellular Telephones | PCMCIA Cards |
Use Scenario: Supplying 2.5V to RF transceiver bias circuits or baseband processor I/O banks in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Low-quiescent-current LDO supporting always-on functions while minimizing standby battery drain. Use Value: 90µA IQ at full load and <1µA in shutdown enable >2-week standby on single Li-ion cell. | Use Scenario: Providing regulated 2.5V to PC Card (PCMCIA) controller ASICs in industrial laptop expansion modules. IC Role / Device Role / Timing Role: Compact, thermally robust power solution for hot-pluggable peripheral interfaces. Use Value: 3mm×3mm TDFN package with exposed pad allows integration into space-constrained card-edge designs with full 500mA capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79525DRVR | 2.5V fixed output, 500mA, 160mV dropout (at 500mA), 200µA IQ, SOT-23-6 package | No integrated RESET output; requires external supervisor IC for power-on reset | Select when RESET is not required and board space permits larger SOT-23 footprint. |
| MCP1825-2502E/DB | 2.5V fixed output, 500mA, 250mV dropout (at 500mA), 120µA IQ, 6-lead SOT-23 package | Higher dropout and no RESET function; lacks thermal shutdown hysteresis specification | Choose for cost-sensitive designs where 2.675V minimum input is acceptable and RESET is handled externally. |
Compared with TPS79525DRVR and MCP1825-2502E/DB, the MAX1589ETT250 uniquely combines 2.5V regulation, integrated 70ms RESET, ultra-low dropout (175mV), and thermal protection in a 3mm×3mm DFN-enabling smaller footprint, simpler BOM, and higher reliability in portable battery-powered systems.
Availability
MAX1589ETT250 is available at Aetrix Electronics and suitable for notebook computers, digital still cameras, and cellular telephones requiring stable component supply with RoHS-compliant packaging and full production traceability.
Supply support for MAX1589ETT250 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 product line delivers low-input-voltage, high-accuracy LDO regulators with integrated power-supervision features specifically for space- and power-constrained battery-powered equipment.
FAQ
What is the output voltage tolerance of the MAX1589ETT250 over temperature?
The MAX1589ETT250 has ±0.5% initial output voltage accuracy at +25°C and maintains ±1.5% over the full -40°C to +85°C operating range. This is verified across production lots and guaranteed by design, ensuring consistent 2.5V regulation for microprocessor I/O and analog sensor biasing in varying environmental conditions. The MAX1589ETT250 achieves this via laser-trimmed internal feedback resistors and a precision bandgap reference.
Does the MAX1589ETT250 require external capacitors, and what values are recommended?
Yes, the MAX1589ETT250 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 across temperature and load, suppress input ripple, and minimize output transient deviation. Using capacitors outside this range-especially higher ESR-may cause oscillation or degraded load-step response. The MAX1589ETT250's internal compensation is optimized for these exact values.
How does the RESET output of the MAX1589ETT250 behave during shutdown?
During shutdown (SHDN = low), the MAX1589ETT250 actively pulls the RESET pin low immediately, regardless of output voltage level. This provides deterministic reset assertion for system-level power sequencing. RESET remains low until SHDN is released and VOUT rises above 82.5% of 2.5V (i.e., ~2.06V), then stays asserted for ≥70ms. The MAX1589ETT250 thus guarantees synchronized reset release after both startup and wake-from-shutdown events.
Can the MAX1589ETT250 operate from a single-cell Li-ion battery throughout its discharge curve?
Yes-the MAX1589ETT250 supports input voltages from 1.62V to 3.6V, covering the full usable range of a single-cell Li-ion battery (2.7V–4.2V). With only 175mV dropout at 500mA, it regulates 2.5V output down to 2.675V input, allowing operation until the battery reaches ~25% remaining capacity. Its low 90µA quiescent current further extends runtime in standby modes. The MAX1589ETT250 is explicitly designed for this use case.
What thermal management is required for the MAX1589ETT250 in high-current operation?
The MAX1589ETT250's 3mm×3mm TDFN package includes an exposed thermal pad (EP) that must be soldered to a PCB ground plane with ≥4 thermal vias (0.3mm diameter) to a solid inner-layer ground plane. Without this, power dissipation is limited to ~0.5W at +70°C ambient. With proper EP connection, it sustains 500mA at full input-output differential (1.1V) continuously. The MAX1589ETT250 incorporates thermal shutdown at +165°C with 15°C hysteresis as a fail-safe.
MAX1589ETT250 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):
- 0.35V @ 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:
- 6-TDFN (3x3)
MAX1589ETT250 FAQ
1.How can I place an order for MAX1589ETT250 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1589ETT250 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 MAX1589ETT250 reliable?
The price and inventory of MAX1589ETT250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1589ETT250 is usually 5 days.
3.What payment methods are accepted for MAX1589ETT250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1589ETT250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1589ETT250?
MAX1589ETT250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1589ETT250 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 MAX1589ETT250?
For technical support, including MAX1589ETT250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1589ETT250 requirements.
6.How does Aetrix verify that MAX1589ETT250 is sourced from the original manufacturer or authorized distributors?
All MAX1589ETT250 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 MAX1589ETT250 meets industry standards.
7.What is the process for return or replacement of MAX1589ETT250?
All MAX1589ETT250 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1589ETT250, 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 MAX1589ETT250 part is unused and in its original packaging.
Return procedure for MAX1589ETT250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1589ETT250 Tags
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