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Analog Devices Inc./Maxim Integrated MAX1589AEZT180+T
- Part No.:
- MAX1589AEZT180+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MAX1589AEZT180+T.pdf
- Description:
- IC REG LIN 1.8V 500MA TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:679
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Product details
Overview
MAX1589AEZT180+T from Maxim Integrated is a low-dropout linear regulator with preset 1.8V 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 battery-powered digital still cameras and notebook computers for stable core voltage regulation.
For engineers reviewing the MAX1589AEZT180+T datasheet, MAX1589AEZT180+T pinout, MAX1589AEZT180+T application, or MAX1589AEZT180+T equivalent, key selection criteria include low-input-voltage operation (1.62V min), thermal-overload protection, logic-controlled shutdown, ground current independence from load/dropout, and compatibility with 1µF/4.7µF ceramic bypass capacitors.
Technical Context
The MAX1589AEZT180+T employs an internal p-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) enabling ultra-low quiescent current (90µA typ at 500mA) and dropout voltage directly proportional to load (VDROPOUT = 0.33Ω × IOUT). Its error amplifier compares a precision bandgap reference against internally divided output voltage to regulate VOUT.
RESET functionality integrates a power-good comparator with 82.5% nominal VOUT threshold and 1.7% hysteresis, asserting low during power-up, brownout (<1V), and shutdown; delay tRP is 70–160ms. Shutdown reduces supply current to <1µA while actively pulling OUT to GND via 1.5kΩ resistor and driving RESET low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V - no external feedback required; matches common I/O or core rail requirements in portable SoCs. |
| Max Output Current | 500mA continuous - supports high-current digital subsystems like image sensors or baseband processors. |
| Dropout Voltage | 175mV at 500mA - enables operation down to 1.97V input when regulating 1.8V, extending battery runtime. |
| Output Accuracy | ±0.5% initial tolerance - ensures reliable logic-level compliance without margining overhead. |
| Ground Current | 90µA typical at 500mA - remains constant across load and dropout, critical for battery life prediction. |
| RESET Delay | 70ms minimum assertion time - meets µP reset timing requirements for safe initialization. |
| Input Voltage Range | 1.62V to 3.6V - compatible with single-cell Li-ion (2.7–4.2V), Li-poly, or dual-cell NiMH under discharge. |
Pinout & Package
MAX1589AEZT180+T is packaged in a 6-pin thin SOT23-6 (1.1mm height) with exposed pad not present; pin 1 = IN, pin 2 = GND, pin 3 = SHDN, pin 4 = RESET, pin 5 = I.C. (internally connected, leave floating or tie to GND), pin 6 = OUT.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input supply | Accepts 1.62V–3.6V; requires ≥1µF ceramic bypass to GND for stability and EMI suppression. |
| 2 (GND) | Power and signal ground | Serves as thermal path; must connect to large copper area to sustain 500mA at elevated ambient temperatures. |
| 3 (SHDN) | Active-low enable control | Pull low to reduce IQ to <1µA; internal pull-up not provided-requires external logic or resistor. |
| 4 (RESET) | Open-drain reset flag | Asserts low during undervoltage/brownout; requires external pull-up to host supply (e.g., 3.3V or VCC_IO). |
| 5 (I.C.) | Internally connected node | No external connection required; floating or GND tie has no functional impact per datasheet. |
| 6 (OUT) | Regulated output | Delivers up to 500mA; requires 4.7µF low-ESR ceramic capacitor to GND for transient response and PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| pMOS pass transistor | Eliminates base-drive current loss; enables 90µA ground current independent of load or dropout voltage. |
| Logic-controlled shutdown | Reduces total supply current to <1µA while disconnecting OUT from IN and asserting RESET low. |
| Thermal-overload protection | Shuts down at +165°C junction temperature with 15°C hysteresis, preventing permanent damage during sustained overload. |
| Short-circuit protection | Current limit set at 550–1150mA (typ 850mA); folds back output voltage to limit power dissipation during fault. |
| Low-noise operation | 86µVRMS output noise (10Hz–100kHz) and 70dB PSRR at DC–1kHz support noise-sensitive analog/RF circuitry. |
Applications
| Digital Still Cameras | Notebook Computers |
|---|---|
Use Scenario: Powering CMOS image sensor interface and ISP core logic during burst capture mode. IC Role / Device Role / Timing Role: Primary 1.8V LDO supplying sensor I/O and processing block with fast load-transient response (35mV overshoot @ 100mA→500mA step). Use Value: Enables clean, regulated 1.8V rail from declining single-cell Li-ion (2.8V–3.6V), preserving dynamic range and reducing digital noise coupling. |
Use Scenario: Providing standby voltage to real-time clock (RTC), keyboard controller, and embedded controller (EC) during S3/S4 sleep states. IC Role / Device Role / Timing Role: Always-on 1.8V regulator with <1µA shutdown current and guaranteed RESET assertion on wake-up voltage ramp. Use Value: Extends battery life in suspend mode while ensuring deterministic microcontroller reset timing upon resume. |
| Cellular Handsets | PCMCIA Cards |
Use Scenario: Supplying 1.8V to baseband processor I/O banks during call setup and data transmission bursts. IC Role / Device Role / Timing Role: High-accuracy, low-dropout regulator with integrated RESET to coordinate power sequencing with PMIC and application processor. Use Value: Maintains voltage stability under rapid 100mA–500mA load transients while meeting ±0.5% accuracy for JEDEC-compliant I/O signaling. |
Use Scenario: Generating 1.8V for CardBus interface logic and flash memory controllers in hot-plug PCMCIA adapters. IC Role / Device Role / Timing Role: Input-undervoltage lockout (1.3V–1.6V) and RESET flag ensure safe initialization only when host supply exceeds valid operating range. Use Value: Prevents erroneous card enumeration or data corruption during marginal 3.3V host supply conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS73118DBVR | Lower 150mV dropout at 500mA; higher 250µA quiescent current; no integrated RESET output. | Lacks power-good monitoring; requires external supervisor IC for reset timing control. | Select when lowest possible dropout is critical and RESET can be implemented separately. |
| MCP1825-1802E/DB | Same 1.8V fixed output; 220mV dropout at 500mA; includes RESET but with 200ms delay (vs. 70ms min); ±2% accuracy. | Looser output tolerance impacts noise-sensitive analog circuits; longer reset delay may violate µP timing specs. | Choose only if extended reset hold time is acceptable and ±2% accuracy suffices for target application. |
Compared with TPS73118DBVR and MCP1825-1802E/DB, MAX1589AEZT180+T uniquely balances low dropout (175mV), ultra-low ground current (90µA), tight accuracy (±0.5%), and precisely timed RESET (70ms min), making it optimal for space-constrained, battery-life-critical portable systems requiring integrated supervision.
Availability
MAX1589AEZT180+T is available at Aetrix Electronics and suitable for digital still cameras, notebook computer subsystems, and cellular handset power management requiring stable component supply, long-term lifecycle support, and lead-free packaging compliance.
Supply support for MAX1589AEZT180+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 product line delivers low-input-voltage, high-accuracy LDOs with integrated RESET for battery-powered equipment where minimal dropout, predictable reset timing, and ultra-low quiescent current are essential.
FAQ
What is the exact output voltage of MAX1589AEZT180+T?
The MAX1589AEZT180+T provides a factory-trimmed fixed output voltage of 1.80V with ±0.5% initial accuracy over temperature and load. This value is confirmed by the "180" suffix in the part number and verified in the Electrical Characteristics table under Output Voltage Accuracy.
Does MAX1589AEZT180+T require external resistors to set its output voltage?
No, MAX1589AEZT180+T does not require external resistors. It is a fixed-output LDO with internally trimmed feedback, configured specifically for 1.8V operation. Pin 5 (I.C.) is internally connected and must remain floating or tied to GND-no resistor network is involved in voltage setting.
What package type is used for MAX1589AEZT180+T?
MAX1589AEZT180+T uses the 6-pin thin SOT23-6 package (package code EZ), measuring <1.1mm in height. It is distinct from the TDFN variant (TT suffix) and features pins arranged in standard SOT23 orientation with exposed pad omitted.
How does the RESET output of MAX1589AEZT180+T behave during power-up?
During power-up, the RESET output of MAX1589AEZT180+T remains asserted low until the output voltage reaches regulation, then stays low for a guaranteed minimum of 70ms before releasing high. This behavior is specified in the Reset Delay (tRP) parameter and ensures proper microprocessor initialization timing.
Is MAX1589AEZT180+T compatible with ceramic output capacitors?
Yes, MAX1589AEZT180+T is explicitly designed for use with ceramic output capacitors: a 4.7µF low-ESR ceramic capacitor is required between OUT and GND for stability, transient response, and PSRR performance. The datasheet confirms stability with ESR ≤30mΩ and recommends placement adjacent to the IC.
MAX1589AEZT180+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:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 3.6V
- Voltage - Output (Min/Fixed):
- 1.8V
- 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
MAX1589AEZT180+T FAQ
1.How can I place an order for MAX1589AEZT180+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1589AEZT180+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 MAX1589AEZT180+T reliable?
The price and inventory of MAX1589AEZT180+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1589AEZT180+T is usually 5 days.
3.What payment methods are accepted for MAX1589AEZT180+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1589AEZT180+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1589AEZT180+T?
MAX1589AEZT180+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1589AEZT180+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 MAX1589AEZT180+T?
For technical support, including MAX1589AEZT180+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1589AEZT180+T requirements.
6.How does Aetrix verify that MAX1589AEZT180+T is sourced from the original manufacturer or authorized distributors?
All MAX1589AEZT180+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 MAX1589AEZT180+T meets industry standards.
7.What is the process for return or replacement of MAX1589AEZT180+T?
All MAX1589AEZT180+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1589AEZT180+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 MAX1589AEZT180+T part is unused and in its original packaging.
Return procedure for MAX1589AEZT180+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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