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Analog Devices Inc./Maxim Integrated MAX1589AETT250+
- Part No.:
- MAX1589AETT250+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX1589AETT250+.pdf
- Description:
- IC REG LINEAR LOW INP VOLT 500MA
- Quantity:
- Payment:
- Shipping:
Inventory:5,537
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Product details
Overview
MAX1589AETT250+ from Maxim Integrated is a low-dropout linear regulator delivering 500mA continuous output at 2.5V with ±0.5% initial accuracy, 175mV dropout at full load, and integrated active-low open-drain RESET flag asserted for ≥70ms after regulation. It operates from 1.62V–3.6V input and targets power rails in notebook computers, digital still cameras, and cellular handsets.
For engineers reviewing the MAX1589AETT250+ datasheet, MAX1589AETT250+ pinout, MAX1589AETT250+ application, or MAX1589AETT250+ equivalent, key selection criteria include guaranteed 500mA load capability under low-input-voltage conditions (≥1.62V), thermal-overload and short-circuit protection, logic-controlled shutdown, and compatibility with 4.7µF ceramic output capacitance for stable transient response.
Technical Context
The MAX1589AETT250+ employs an internal p-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) enabling low quiescent current (90µA typical at 500mA) independent of load and dropout voltage. Its error amplifier compares a precision reference against a fixed internal feedback divider to regulate the 2.5V output.
RESET functionality uses a dedicated power-good comparator monitoring VOUT; it asserts low when VOUT falls below 82.5% of nominal (2.0625V) and remains asserted ≥70ms after recovery. Shutdown disables the pass transistor, pulls OUT to GND via 1.5kΩ, and reduces supply current to <1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V fixed (internally trimmed; no external resistors required) |
| Max Output Current | 500mA continuous - supports core logic or memory rails in portable systems |
| Dropout Voltage | 175mV at 500mA - enables operation down to 2.675V input for 2.5V rail |
| Output Accuracy | ±0.5% initial (25°C), ±1.5% over -40°C to +85°C - ensures tight voltage margining |
| Ground Current | 90µA typical at 500mA - minimizes battery drain during active operation |
| RESET Delay | 70ms minimum assertion time - meets µP reset timing requirements for reliable boot |
| Input Voltage Range | 1.62V to 3.6V - compatible with single Li-ion, Li-poly, or dual NiMH cells |
Pinout & Package
MAX1589AETT250+ is housed in a 6-pin, 3mm × 3mm thin DFN package with exposed thermal pad (EP), rated for 1.951W max power dissipation at +70°C ambient. The EP must be soldered to a PCB ground plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EP) | Exposed Pad | Thermal heatsink and electrical GND - requires solid solder connection to PCB ground plane |
| 2 | OUT | Regulated 2.5V output - sources up to 500mA; bypass with 4.7µF low-ESR ceramic capacitor |
| 3 | SHDN | Active-low shutdown control - logic low disables regulator, pulls OUT to GND, and asserts RESET |
| 4 | GND | Power and signal ground - connects to EP and system ground; critical for stability and thermal management |
| 5 | RESET | Active-low open-drain reset flag - pulled low during power-up/brownout; requires external pull-up |
| 6 | IN | Input supply (1.62V–3.6V) - bypass with ≥1µF ceramic capacitor close to pin |
Key Features
| Feature | Design Value |
|---|---|
| pMOS Pass Transistor | 0.33Ω RDS(ON) enables low dropout and eliminates base-drive current loss |
| Logic-Controlled Shutdown | Reduces supply current to <1µA and actively discharges OUT via 1.5kΩ resistor |
| Integrated RESET Circuit | Guaranteed 70ms minimum assertion time with 82.5% threshold - no external components needed |
| Thermal-Overload Protection | Shuts down at +165°C junction temperature with 15°C hysteresis - prevents permanent damage |
| Short-Circuit Protection | Current limit set at 850mA typical - protects IC and source during output fault conditions |
Applications
| Notebook Computers | Digital Still Cameras |
|---|---|
Use Scenario: Powering image sensor interface and ISP core logic requiring clean, stable 2.5V supply. IC Role / Device Role / Timing Role: Primary LDO regulator for noise-sensitive analog/digital mixed-signal blocks. Use Value: 86µVRMS output noise and 70dB PSRR at 1kHz ensure minimal clock jitter and ADC SNR degradation. |
Use Scenario: Supplying CMOS image sensor bias and memory controller in compact camera modules. IC Role / Device Role / Timing Role: Low-profile, high-current LDO with fast load-transient response (35mV overshoot @ 100mA→500mA). Use Value: 3mm × 3mm TDFN footprint and <0.8mm height enable integration into space-constrained optical assemblies. |
| Cellular Handsets | PCMCIA Cards |
Use Scenario: Regulating RF transceiver I/O or baseband processor auxiliary rails in multi-battery-voltage platforms. IC Role / Device Role / Timing Role: Input-flexible LDO supporting 1.62V–3.6V range - accommodates aging Li-ion discharge curve. Use Value: 175mV dropout extends usable battery life by enabling regulation until cell voltage drops to 2.675V. |
Use Scenario: Providing regulated 2.5V to PC Card controller ASICs in legacy laptop expansion slots. IC Role / Device Role / Timing Role: Reset-supervised LDO ensuring deterministic initialization sequence during hot-plug events. Use Value: RESET output guarantees ≥70ms hold time after VOUT stabilization - satisfies PCMCIA 2.1 power-on timing spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2025PDQNR | 2.5V fixed, 300mA output, 130mV dropout at 300mA, 65µA IQ - lower current, lower dropout, smaller 1.5mm × 1.5mm DSBGA | Limited to ≤300mA loads; insufficient for 500mA camera sensor rails | Select only if load current ≤300mA and board space is critical |
| MCP1825-2502E/DB | 2.5V fixed, 500mA output, 350mV dropout at 500mA, ±2% accuracy, SOT-23-5 - higher dropout, looser tolerance, no RESET | Lacks integrated RESET and has reduced accuracy - requires external supervisor circuit | Choose only if RESET is implemented externally and ±2% tolerance is acceptable |
Compared with MAX1589AETT250+, TPS7A2025PDQNR offers lower quiescent current and smaller size but cannot sustain 500mA loads, while MCP1825-2502E/DB delivers matching current capability but sacrifices dropout performance, output accuracy, and integrated supervision - making MAX1589AETT250+ the sole option meeting all three: 500mA, ≤175mV dropout, and guaranteed RESET timing.
Availability
MAX1589AETT250+ is available at Aetrix Electronics and suitable for notebook computers, digital still cameras, and cellular handsets requiring stable component supply across extended production lifecycles.
Supply support for MAX1589AETT250+ 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 MAX1589A series was developed specifically for battery-powered portable electronics needing ultra-low-input-voltage operation, high accuracy, and integrated power-supply supervision in minimal footprint packages.
FAQ
What is the exact output voltage of MAX1589AETT250+?
The MAX1589AETT250+ provides a factory-trimmed fixed output voltage of 2.5V. This value is internally preset and does not require external resistors. Electrical testing confirms ±0.5% initial accuracy at +25°C and ±1.5% over the full -40°C to +85°C operating range, as verified in the device's production-tested specifications table.
Does MAX1589AETT250+ include a power-on reset function?
Yes, MAX1589AETT250+ integrates an active-low, open-drain RESET output that asserts low during power-up, brownout, or shutdown. It remains asserted for a guaranteed minimum of 70ms after VOUT reaches regulation and deasserts only when VOUT exceeds 82.5% of nominal (2.0625V) and remains stable.
What package type is used for MAX1589AETT250+?
MAX1589AETT250+ is supplied in a 6-pin thin DFN package measuring 3mm × 3mm × 0.8mm with an exposed thermal pad (EP). This package supports higher power dissipation (1.951W at +70°C) than the SOT23 variant and requires soldering the EP to a PCB ground plane for thermal integrity.
Can MAX1589AETT250+ operate from a single-cell lithium battery?
Yes, MAX1589AETT250+ supports input voltages from 1.62V to 3.6V, fully covering the discharge profile of a single Li-ion or Li-polymer cell (typically 4.2V down to ~2.7V). Its 175mV dropout at 500mA allows regulation of the 2.5V output until the input drops to 2.675V - extending usable runtime significantly.
What protection features are built into MAX1589AETT250+?
MAX1589AETT250+ includes thermal-overload protection (shuts down at +165°C junction temperature with 15°C hysteresis), short-circuit current limiting (850mA typical), and logic-controlled shutdown. During shutdown, the output is actively discharged to GND via a 1.5kΩ internal resistor, and supply current drops below 1µA.
MAX1589AETT250+ 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)
MAX1589AETT250+ FAQ
1.How can I place an order for MAX1589AETT250+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1589AETT250+ 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 MAX1589AETT250+ reliable?
The price and inventory of MAX1589AETT250+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1589AETT250+ is usually 5 days.
3.What payment methods are accepted for MAX1589AETT250+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1589AETT250+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1589AETT250+?
MAX1589AETT250+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1589AETT250+ 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 MAX1589AETT250+?
For technical support, including MAX1589AETT250+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1589AETT250+ requirements.
6.How does Aetrix verify that MAX1589AETT250+ is sourced from the original manufacturer or authorized distributors?
All MAX1589AETT250+ 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 MAX1589AETT250+ meets industry standards.
7.What is the process for return or replacement of MAX1589AETT250+?
All MAX1589AETT250+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1589AETT250+, 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 MAX1589AETT250+ part is unused and in its original packaging.
Return procedure for MAX1589AETT250+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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