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Analog Devices Inc./Maxim Integrated MAX1589AETT250+T
- Part No.:
- MAX1589AETT250+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX1589AETT250+T.pdf
- Description:
- IC REG LINEAR 2.5V 500MA 6TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,835
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Product details
Overview
MAX1589AETT250+T from Maxim Integrated is a low-dropout linear regulator with preset 2.5V output, delivering guaranteed 500mA continuous current from 1.62V–3.6V input, featuring ±0.5% initial accuracy, 175mV dropout at full load, and active-low open-drain RESET output asserted for ≥70ms after regulation-designed for power rail stabilization in notebook computers and portable digital cameras.
For engineers reviewing the MAX1589AETT250+T datasheet, MAX1589AETT250+T pinout, MAX1589AETT250+T application, or MAX1589AETT250+T equivalent, this page provides verified package mapping (6-pin TDFN, 3mm × 3mm), confirmed thermal shutdown (+165°C), reset threshold (82.5% VOUT), ground current behavior (70µA in dropout), and logic-controlled shutdown interface.
Technical Context
The MAX1589AETT250+T integrates a p-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) enabling low-quiescent-current operation independent of load and dropout voltage. Its error amplifier compares internal reference against feedback to regulate output, while a dedicated power-good comparator drives the open-drain RESET output.
Shutdown is controlled via active-low SHDN pin, disconnecting OUT from IN and pulling RESET low; during shutdown, supply current drops below 1µA and an internal 1.5kΩ resistor pulls OUT to GND. Thermal protection activates at +165°C junction temperature with 15°C hysteresis, causing pulsed output under sustained overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V (preset, internally trimmed) |
| Max Output Current | 500mA continuous; supports high-current digital core rails without external current boosting |
| Dropout Voltage | 175mV at 500mA load; enables operation down to VIN = 2.675V for 2.5V rail |
| Output Accuracy | ±0.5% initial tolerance; ensures stable voltage for precision analog or memory interfaces |
| RESET Delay | 70ms minimum assertion time after VOUT reaches regulation; meets µP power-on reset timing requirements |
| Quiescent Current | 90µA typical at 500mA load; maintains ultra-low bias current even in dropout condition |
| Input Voltage Range | 1.62V to 3.6V; compatible with single-cell Li-ion, Li-polymer, and multi-cell alkaline systems |
Pinout & Package
MAX1589AETT250+T is housed in a 6-pin, 3mm × 3mm thin DFN package with exposed thermal pad (EP), rated for 1.951W max power dissipation at TA = +70°C. The EP must be soldered to a large PCB ground plane for effective thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EP) | Exposed Pad | Thermal heatsink and electrical GND connection; mandatory for thermal performance |
| 2 | GND | Power ground reference and return path for internal circuitry |
| 3 | SHDN | Active-low logic input; pulls low to reduce supply current <1µA and assert RESET |
| 4 | RESET | Active-low open-drain output; requires external pull-up; asserts when VOUT < 82.5% nominal |
| 5 | I.C. | Internally connected node; leave floating or tie to GND per layout guidelines |
| 6 | OUT | Regulated 2.5V output; sources up to 500mA; bypass with 4.7µF low-ESR ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| p-Channel MOSFET Pass Transistor | RDS(ON) = 0.33Ω enables low dropout and eliminates base-drive current loss |
| Logic-Controlled Shutdown | SHDN pin reduces IQ to <1µA and actively pulls RESET low-ideal for system-level power sequencing |
| Reset Output with Hysteresis | Asserts on power-up/brownout; 1.7% hysteresis prevents chatter during marginal VOUT conditions |
| Thermal-Overload Protection | +165°C trip point with 15°C hysteresis ensures safe pulsed operation during fault conditions |
| Low-ESR Capacitor Stability | Stable with ≤30mΩ ESR output capacitors; supports compact ceramic solutions without external compensation |
Applications
| Notebook Computer Core Rail | Digital Still Camera Sensor Supply |
|---|---|
Use Scenario: Powers image signal processor (ISP) and CMOS sensor analog front-end requiring clean, stable 2.5V at up to 500mA. IC Role / Device Role / Timing Role: Primary LDO regulator providing regulated 2.5V bias; RESET signals processor readiness to firmware. Use Value: 175mV dropout extends battery life by enabling operation until cell voltage drops to 2.675V; ±0.5% accuracy prevents sensor gain drift. |
Use Scenario: Supplies high-speed ADC and analog video chain in compact digital camera modules. IC Role / Device Role / Timing Role: Low-noise 2.5V source with 86µVRMS output noise; RESET synchronizes boot sequence with power stabilization. Use Value: 70ms RESET delay satisfies camera SoC power-on reset timing; 90µA quiescent current minimizes standby drain. |
| Cellular Phone Baseband IC | PCMCIA Card I/O Interface |
Use Scenario: Delivers 2.5V to baseband processor I/O banks in dual-voltage GSM/UMTS handsets. IC Role / Device Role / Timing Role: Secondary LDO supporting I/O domain; SHDN pin enables dynamic power gating during sleep modes. Use Value: Logic-controlled shutdown reduces system idle current to sub-µA; 1.62V min input supports aging Li-ion cells. |
Use Scenario: Provides 2.5V to PCMCIA card controller logic and level-shifting circuitry in industrial data acquisition cards. IC Role / Device Role / Timing Role: Regulated auxiliary supply with RESET monitoring; detects undervoltage before card enumeration. Use Value: 82.5% reset threshold ensures reliable detection of brownout events; TDFN package fits tight card-edge layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79525DRBT | 2.5V fixed output, 500mA, 160mV dropout, but requires minimum 2.7V input; no integrated RESET | Lacks RESET functionality-requires external supervisor IC for power-on sequencing | Choose only if RESET is implemented separately and input voltage remains ≥2.7V |
| MCP1825-2502E/DB | 2.5V fixed output, 500mA, 230mV dropout at 500mA, ±2% accuracy, no RESET, SOT-23-5 package | Higher dropout and lower accuracy limit usable battery range and analog performance | Acceptable for cost-sensitive, non-critical rails where RESET and tight tolerance are not required |
Compared with MAX1589AETT250+T, TPS79525DRBT offers lower dropout but lacks RESET and has higher minimum input voltage, while MCP1825-2502E/DB trades accuracy and integrated supervision for smaller footprint and lower cost-neither matches the combined 2.5V precision, RESET timing, and ultra-low-input capability of MAX1589AETT250+T.
Availability
MAX1589AETT250+T is available at Aetrix Electronics and suitable for notebook computers, digital still cameras, cellular handsets, and PCMCIA cards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1589AETT250+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 MAX1589A series targets battery-powered systems needing low-input-voltage, high-accuracy LDOs with integrated power supervision-optimized for space-constrained, thermally sensitive portable electronics.
FAQ
What is the exact output voltage and tolerance of MAX1589AETT250+T?
The MAX1589AETT250+T delivers a factory-trimmed fixed 2.5V output with ±0.5% initial accuracy over temperature and load. This specification is guaranteed across -40°C to +85°C and for output currents from 1mA to 500mA, ensuring consistent performance in precision analog and digital subsystems without external feedback components.
Does MAX1589AETT250+T include a power-good or reset function, and how does it behave?
Yes, MAX1589AETT250+T features an active-low, open-drain RESET output that asserts when VOUT falls below 82.5% of nominal (2.0625V) and remains asserted for at least 70ms after VOUT rises above regulation. RESET is actively pulled low during shutdown and at power-up, providing reliable microprocessor reset signaling without external components.
What package type and thermal characteristics apply to MAX1589AETT250+T?
MAX1589AETT250+T uses a 6-pin, 3mm × 3mm thin DFN package with exposed thermal pad (EP). At TA = +70°C, it supports up to 1.951W power dissipation with 24.4mW/°C derating above that temperature. Proper soldering of the EP to a large PCB ground plane is required to achieve rated thermal performance and sustain 500mA output current.
How does MAX1589AETT250+T handle shutdown and quiescent current?
When the SHDN pin is pulled low, MAX1589AETT250+T disconnects OUT from IN, pulls RESET low, and reduces total supply current to below 1µA. Quiescent current remains stable at ~90µA under full 500mA load and drops to 70µA in dropout-enabling efficient operation across wide input voltage and load ranges without external control circuitry.
What are the key capacitor requirements for stable operation of MAX1589AETT250+T?
MAX1589AETT250+T requires a 1µF ceramic capacitor between IN and GND, and a 4.7µF low-ESR (≤30mΩ) ceramic capacitor between OUT and GND. These values ensure stability across temperature and load, minimize output noise (86µVRMS), and support fast load-transient response-capacitors must be placed as close as possible to the device pins to reduce trace inductance effects.
MAX1589AETT250+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX1589AETT250+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1589AETT250+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 MAX1589AETT250+T reliable?
The price and inventory of MAX1589AETT250+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1589AETT250+T is usually 5 days.
3.What payment methods are accepted for MAX1589AETT250+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1589AETT250+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1589AETT250+T?
MAX1589AETT250+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1589AETT250+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 MAX1589AETT250+T?
For technical support, including MAX1589AETT250+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1589AETT250+T requirements.
6.How does Aetrix verify that MAX1589AETT250+T is sourced from the original manufacturer or authorized distributors?
All MAX1589AETT250+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 MAX1589AETT250+T meets industry standards.
7.What is the process for return or replacement of MAX1589AETT250+T?
All MAX1589AETT250+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1589AETT250+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 MAX1589AETT250+T part is unused and in its original packaging.
Return procedure for MAX1589AETT250+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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