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Analog Devices Inc./Maxim Integrated MAX1589AEZT150+T
- Part No.:
- MAX1589AEZT150+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MAX1589AEZT150+T.pdf
- Description:
- IC REG LIN 1.5V 500MA TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,201
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Product details
Overview
MAX1589AEZT150+T from Maxim Integrated is a low-dropout linear regulator with preset 1.5V 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-used in notebook computer core logic power rails.
For engineers reviewing the MAX1589AEZT150+T datasheet, MAX1589AEZT150+T pinout, MAX1589AEZT150+T application, or MAX1589AEZT150+T equivalent, key selection criteria include low-input-voltage operation down to 1.62V, thermal-overload protection at +165°C, shutdown supply current <1µA, and compatibility with 1µF/4.7µF ceramic bypass capacitors.
Technical Context
The MAX1589AEZT150+T integrates a p-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) enabling dropout voltage defined as VIN – VOUT = 0.33Ω × IOUT, with ground current independent of load and dropout. Its error amplifier compares internal reference against feedback from fixed resistor divider to regulate output.
RESET functionality uses a power-good comparator monitoring VOUT against 82.5% nominal threshold with 1.7% hysteresis; RESET remains low for ≥70ms after VOUT reaches regulation and asserts immediately on brownout or shutdown. Thermal protection disables the pass transistor above +165°C with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V - no external feedback required; matches core voltage requirements of ARM9/Intel Atom-based embedded processors. |
| Max Output Current | 500mA continuous - supports single-core application processors or FPGA I/O banks without derating at +70°C ambient. |
| Dropout Voltage | 175mV at 500mA - enables operation from single-cell Li-ion (2.8V min) or dual-cell NiMH (2.4V min) through end-of-life. |
| Output Accuracy | ±0.5% initial - ensures reliable CPU reset assertion and memory interface timing margins across temperature and line/load variation. |
| RESET Delay | 70ms minimum - satisfies Intel Mobile Platform Power-On Reset (POR) timing requirement for stable core voltage establishment. |
| Quiescent Current | 90µA typical at 500mA - maintains ultra-low standby power in always-on subsystems such as real-time clocks or PMIC sequencers. |
| Shutdown Current | <1µA - reduces battery drain during system suspend-to-RAM or deep sleep modes in portable devices. |
Pinout & Package
MAX1589AEZT150+T is packaged in a 6-pin thin SOT23-6 (1.1mm height) with exposed pad omitted; pin 1 = IN, pin 2 = GND, pin 3 = SHDN, pin 4 = RESET, pin 5 = I.C., pin 6 = OUT. GND serves as thermal path; I.C. must be left floating or tied to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply connection | Accepts 1.62V–3.6V; requires ≥1µF ceramic bypass to GND close to pin to suppress source impedance-induced instability. |
| 2 (GND) | Power and signal reference | Serves as thermal heatsink; must connect to large PCB copper area to sustain 500mA at elevated ambient temperatures. |
| 3 (SHDN) | Active-low enable control | Pull low to disable regulator output and reduce supply current to <1µA; internal 1.5kΩ pull-down ensures safe default state. |
| 4 (RESET) | Open-drain reset flag | Asserts low when VOUT < 82.5% of 1.5V; requires external pull-up for µP reset input; 100µA sink capability supports standard logic thresholds. |
| 5 (I.C.) | Internally connected node | No external connection required; floating or GND tie has no functional impact per datasheet Pin Description section. |
| 6 (OUT) | Regulated output | Delivers 1.5V/500mA; requires 4.7µF low-ESR ceramic capacitor to GND within 5mm for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| pMOS pass transistor | Eliminates base-drive current loss; enables 90µA quiescent current at full load and in dropout-critical for battery runtime extension. |
| Logic-controlled shutdown | Reduces total system standby power by disconnecting output and sinking RESET, supporting ACPI S3/S5 states in notebooks. |
| Thermal-overload protection | Auto-cycles output at +165°C junction temperature with 15°C hysteresis-prevents permanent damage during sustained overload or poor heatsinking. |
| Short-circuit protection | Limits output current to 850mA typical; prevents catastrophic failure during PCB trace shorts or connector misinsertion in field-deployed equipment. |
| Low 1.62V minimum input | Enables direct regulation from partially discharged Li-ion cells (2.8V–3.0V), extending usable battery capacity beyond competing 2.0V-min LDOs. |
Applications
| Notebook Computer Core Logic | Digital Still Camera Image Sensor Bias |
|---|---|
|
Use Scenario: Powers ARM-based application processor core rail in sub-1W ultraportable notebooks requiring tight voltage tolerance and fast transient response. IC Role / Device Role / Timing Role: Primary 1.5V core LDO supplying CPU VDD with RESET synchronized to power sequencing controller. Use Value: ±0.5% accuracy ensures processor meets VDD spec over temperature; 35mV load transient overshoot (100mA→500mA) avoids logic errors during burst processing. |
Use Scenario: Supplies bias voltage to CMOS image sensor analog front-end in compact digital cameras where board space limits discrete DC/DC use. IC Role / Device Role / Timing Role: Low-noise 1.5V analog rail generator with RESET used to hold sensor in reset until stable power is confirmed. Use Value: 86µVRMS output noise prevents fixed-pattern noise in raw sensor data; 70ms RESET delay guarantees clean sensor initialization. |
| Cellular Phone Baseband Processor | PCMCIA Card I/O Interface |
|
Use Scenario: Provides regulated 1.5V to baseband SoC in GSM/UMTS handsets operating from single-cell Li-ion with dynamic load profiles. IC Role / Device Role / Timing Role: Load-switched LDO with SHDN controlled by PMIC; RESET feeds baseband reset controller for cold boot validation. Use Value: 175mV dropout allows >20% longer talk time vs. 250mV-dropout alternatives at end-of-discharge; shutdown current <1µA preserves battery during idle. |
Use Scenario: Generates 1.5V for PCMCIA Type II card interface logic in industrial handheld terminals where hot-swap reliability is critical. IC Role / Device Role / Timing Role: Hot-plug power supervisor with RESET signaling card insertion status to host controller via open-drain interface. Use Value: Active-low RESET with 100µA sink strength drives standard 10kΩ pull-up; thermal protection prevents latch-up during repeated card insertion cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B152MR-G | 1.5V fixed output, 400mA max, 250mV dropout at 400mA, no RESET output | Lacks integrated reset supervision; requires external reset IC for power-on sequencing | Select when RESET is handled separately and lower cost is prioritized over integration. |
| Analog Devices ADP1715ARMZ-1.5-R7 | 1.5V fixed output, 500mA max, 200mV dropout at 500mA, 1.2µA shutdown current | Higher shutdown current; no built-in RESET; uses different pinout (IN/GND/EN/OUT) | Choose when footprint compatibility with ADP1715 is required and external reset generation is acceptable. |
Compared with MAX1589AEZT150+T, XC6219B152MR-G saves cost but adds design complexity via external reset circuitry, while ADP1715ARMZ-1.5-R7 offers similar current capability but sacrifices the integrated 70ms RESET timing and low 1.62V input support critical for Li-ion end-of-life operation.
Availability
MAX1589AEZT150+T is available at Aetrix Electronics and suitable for notebook computers, cellular phones, digital still cameras, and PCMCIA cards requiring stable component supply with lead-free packaging and -40°C to +85°C operation.
Supply support for MAX1589AEZT150+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 high-reliability industrial, automotive, and computing applications.
The MAX1589A product line delivers low-input-voltage, high-accuracy LDO regulators with integrated RESET for portable battery-powered systems where extended runtime and robust power sequencing are essential.
FAQ
What is the maximum input voltage rating for the MAX1589AEZT150+T?
The MAX1589AEZT150+T has an absolute maximum input voltage of +4.0V referenced to GND. Its operational input range is specified from +1.62V to +3.6V. Exceeding +4.0V may cause permanent damage per Absolute Maximum Ratings. The device is designed for single-cell Li-ion and multi-cell alkaline/NiMH battery inputs, not for higher-voltage DC/DC outputs.
Does the MAX1589AEZT150+T require external components for stable operation?
Yes, the MAX1589AEZT150+T requires a 1µF ceramic capacitor between IN and GND, and a 4.7µF low-ESR ceramic capacitor between OUT and GND. These capacitors ensure stability across temperature and load, suppress input source impedance effects, and maintain transient response within specification. Omitting either capacitor risks oscillation or excessive output ripple.
How does the RESET output behave during input undervoltage conditions?
The RESET output of the MAX1589AEZT150+T asserts low when VOUT falls below 82.5% of its nominal 1.5V value-approximately 1.2375V-and remains asserted until VOUT rises above that threshold and sustains regulation for ≥70ms. It also asserts during shutdown and under input undervoltage lockout (VUVLO ≤ 1.60V), providing comprehensive brownout detection.
Can the MAX1589AEZT150+T operate with a 1.5V input supply?
No-the MAX1589AEZT150+T requires a minimum input voltage of +1.62V to maintain regulation at 1.5V output. At 1.5V input, the device cannot achieve dropout headroom and will cease regulation. Its 175mV dropout specification applies only when input is ≥1.675V; operation below 1.62V violates Absolute Maximum Ratings for IN-to-GND voltage.
What thermal protection mechanism does the MAX1589AEZT150+T implement?
The MAX1589AEZT150+T incorporates thermal-overload protection that disables the p-channel pass transistor when junction temperature exceeds +165°C. After shutdown, the device remains off until junction temperature drops by 15°C (to +150°C), then resumes regulation. This pulsed operation prevents permanent damage during sustained overload or inadequate PCB heatsinking.
MAX1589AEZT150+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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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
MAX1589AEZT150+T FAQ
1.How can I place an order for MAX1589AEZT150+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1589AEZT150+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 MAX1589AEZT150+T reliable?
The price and inventory of MAX1589AEZT150+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1589AEZT150+T is usually 5 days.
3.What payment methods are accepted for MAX1589AEZT150+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1589AEZT150+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1589AEZT150+T?
MAX1589AEZT150+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1589AEZT150+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 MAX1589AEZT150+T?
For technical support, including MAX1589AEZT150+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1589AEZT150+T requirements.
6.How does Aetrix verify that MAX1589AEZT150+T is sourced from the original manufacturer or authorized distributors?
All MAX1589AEZT150+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 MAX1589AEZT150+T meets industry standards.
7.What is the process for return or replacement of MAX1589AEZT150+T?
All MAX1589AEZT150+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1589AEZT150+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 MAX1589AEZT150+T part is unused and in its original packaging.
Return procedure for MAX1589AEZT150+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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