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Analog Devices Inc./Maxim Integrated MAX1589ETT150+
- Part No.:
- MAX1589ETT150+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX1589ETT150+.pdf
- Description:
- IC REG LINEAR 500MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:1,858
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Product details
Overview
The MAX1589ETT150+ from Maxim Integrated is a low-dropout linear regulator with preset 1.5V output, delivering guaranteed 500mA continuous current from a 1.62V–3.6V input supply while maintaining ±0.5% initial accuracy and 175mV dropout at full load. It integrates an active-low open-drain RESET output asserted for ≥70ms after regulation, logic-controlled shutdown, thermal-overload and short-circuit protection, and is optimized for space-constrained portable battery-powered systems including notebook computers and digital still cameras.
For engineers reviewing the MAX1589ETT150+ datasheet, MAX1589ETT150+ pinout, MAX1589ETT150+ application, or MAX1589ETT150+ equivalent, key selection considerations include its 1.5V fixed output, TDFN-6 (3mm × 3mm × 0.8mm) RoHS-compliant package, 70ms reset delay, supply-current independence from load/dropout, and compatibility with low-ESR ceramic capacitors (1µF IN / 4.7µF OUT).
Technical Context
The MAX1589ETT150+ employs an internal P-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) enabling low quiescent current (90µA typ at 500mA) and dropout voltage scaling linearly with load (VDROP = 0.33Ω × IOUT). Its error amplifier compares a precision reference against internal feedback to regulate output voltage, while the power-good comparator monitors VOUT to drive the open-drain RESET signal.
Shutdown is implemented via active-low SHDN pin, disconnecting OUT from IN and pulling OUT to GND through a 1.5kΩ resistor; during shutdown, supply current drops below 1µA and RESET is actively pulled low. Thermal protection activates at +165°C junction temperature with 15°C hysteresis, cycling the pass transistor under sustained overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±0.5% initial accuracy ensures stable core voltage for 1.5V logic rails without external resistors. |
| Max Output Current | 500mA continuous - sufficient for powering microcontrollers, memory, or interface ICs in portable devices. |
| Dropout Voltage | 175mV at 500mA - enables operation down to 1.675V input, extending usable battery life in single-cell Li-ion or Li-poly systems. |
| Input Voltage Range | 1.62V to 3.6V - supports direct connection to partially discharged batteries or regulated intermediate supplies. |
| RESET Delay | 70ms minimum assertion time after VOUT reaches regulation - meets typical µP power-on reset timing requirements. |
| Quiescent Current | 90µA typical at 500mA load - remains constant across load and dropout, minimizing standby power loss. |
| Shutdown Current | <1µA - reduces system leakage during sleep modes, critical for long battery runtime. |
Pinout & Package
MAX1589ETT150+ uses a 6-pin 3mm × 3mm thin DFN (TDFN) package with exposed thermal pad (EP), rated for -40°C to +85°C operation. The package height is <0.8mm, supporting ultra-thin portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 1.62V–3.6V supply; requires ≥1µF ceramic bypass to GND for stability and noise suppression. |
| 2 (GND) | Ground reference and thermal path | Internal ground node; EP must be soldered to PCB ground plane to maximize thermal dissipation (θJA ≈ 41°C/W). |
| 3 (SHDN) | Active-low shutdown control | Pull low to disable regulator, reduce IQ to <1µA, and assert RESET; connect to IN or high logic for normal operation. |
| 4 (RESET) | Active-low open-drain reset flag | Asserted low until VOUT stabilizes; remains low ≥70ms after regulation, then floats high (requires external pull-up). |
| 5 (I.C.) | Internally connected | No external connection required; may be left floating or tied to GND per layout best practice. |
| 6 (OUT) | Regulated 1.5V output | Sources up to 500mA; requires 4.7µF low-ESR ceramic capacitor to GND for transient response and PSRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Low-input-voltage operation | Starts regulation at 1.62V input - compatible with single-cell Li-ion (2.7–4.2V) and LiFePO4 (2.0–3.6V) batteries near end-of-discharge. |
| P-channel MOSFET pass element | RDS(ON) = 0.33Ω eliminates base-drive current, enabling constant 90µA IQ even in dropout - unlike PNP-based LDOs. |
| Integrated RESET supervisor | Guaranteed 70ms reset pulse with 82.5% VOUT threshold ensures reliable µP initialization during brownout and power-up. |
| Thermal and current protection | 165°C thermal shutdown with 15°C hysteresis and 850mA current limit prevent damage during fault conditions without external components. |
| Tiny TDFN-6 footprint | 3mm × 3mm × 0.8mm body with exposed pad - saves >50% board area vs. SOT23-6 while improving thermal performance (1.95W max at +70°C). |
Applications
| Notebook Computers | Digital Still Cameras |
|---|---|
Use Scenario: Powering image sensor I/O, ISP core, or SD card interface in ultraportable notebooks with tight thermal and space constraints. IC Role / Device Role / Timing Role: Primary 1.5V LDO supplying low-noise, high-PSRR voltage to sensitive analog and mixed-signal blocks. Use Value: 175mV dropout extends battery runtime by enabling operation down to 1.675V input; 86µVRMS output noise prevents image artifacts. |
Use Scenario: Regulating power to CMOS image sensor bias circuits and flash memory controllers during burst capture mode. IC Role / Device Role / Timing Role: Stable 1.5V supply with fast load-transient response (35mV overshoot @ 100mA→500mA step) to maintain sensor linearity. Use Value: 500mA capability supports simultaneous sensor readout and memory write; RESET output synchronizes firmware boot with power stabilization. |
| Cellular Telephones | PCMCIA Cards |
Use Scenario: Supplying RF transceiver baseband logic or audio codec in dual-SIM smartphones where board area and thermal headroom are limited. IC Role / Device Role / Timing Role: Secondary LDO generating clean 1.5V rail isolated from noisy main PMIC outputs. Use Value: 70dB PSRR at 1kHz suppresses switching noise from adjacent DC/DC converters; TDFN package allows placement near noise-sensitive ICs. |
Use Scenario: Providing regulated 1.5V to PC Card controller ASICs in legacy industrial data-acquisition modules. IC Role / Device Role / Timing Role: Compact, drop-in replacement for aging LDOs in space-constrained PCMCIA sockets with minimal layout change. Use Value: Pin-compatible with standard TDFN-6 footprints; RoHS-compliant (MAX1589ETT150+) meets modern compliance requirements without redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2015PDQNR | 1.5V fixed, 300mA output, 165mV dropout at 300mA, 65µA IQ, X2SON-6 (1.5mm × 1.5mm) | Lower current rating limits use in high-load camera or notebook subsystems; smaller footprint benefits ultra-dense layouts. | Select when 300mA suffices and board area is more constrained than thermal budget. |
| MCP1825-1502E/DB | 1.5V fixed, 500mA output, 250mV dropout at 500mA, 120µA IQ, SOT-23-5 (no RESET) | Lacks integrated RESET output and uses larger SOT-23-5; higher dropout reduces usable battery range. | Choose only if RESET functionality is handled externally and SOT-23 assembly infrastructure is already in place. |
Compared with TPS7A2015PDQNR and MCP1825-1502E/DB, the MAX1589ETT150+ uniquely combines 500mA delivery, 175mV dropout, integrated RESET, and TDFN-6 thermal performance - making it optimal for battery-powered systems requiring both high current and supervisory functions in minimal area.
Availability
MAX1589ETT150+ is available at Aetrix Electronics and suitable for notebook computers, digital still cameras, and cellular telephones requiring stable component supply with RoHS compliance and extended battery-life support.
Supply support for MAX1589ETT150+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX1589 series was designed specifically for low-input-voltage, high-accuracy LDO regulation in portable battery-powered equipment - emphasizing minimal dropout, ultra-low quiescent current, and integrated power-supervision features.
FAQ
What is the output voltage tolerance of the MAX1589ETT150+ over temperature and load?
The MAX1589ETT150+ guarantees ±0.5% initial output voltage accuracy at +25°C. Over the full -40°C to +85°C operating range and 1mA–500mA load, total output voltage variation remains within ±1.5%, as confirmed by electrical characteristics tables and typical operating curves showing <±0.2% drift across temperature and load for the 1.5V variant.
Does the MAX1589ETT150+ require external components for stable operation?
Yes, the MAX1589ETT150+ requires a 1µF ceramic capacitor between IN and GND, and a 4.7µF low-ESR ceramic capacitor between OUT and GND. These are mandatory for stability, transient response, and PSRR performance across temperature and load - omitting them risks oscillation or excessive output ripple.
How does the RESET output of the MAX1589ETT150+ behave during shutdown?
During shutdown (SHDN = low), the MAX1589ETT150+ actively pulls the RESET pin low regardless of output voltage state. RESET remains asserted until SHDN is released and VOUT rises above 82.5% of 1.5V (1.2375V), then stays low for ≥70ms before releasing - ensuring deterministic microprocessor reset sequencing.
Can the MAX1589ETT150+ be used with input voltages below 1.62V?
No - the MAX1589ETT150+ has a minimum input voltage of 1.62V, enforced by internal undervoltage lockout (UVLO) that disables regulation below ~1.60V. Attempting operation below this threshold results in unregulated output and potential instability; it is not rated for sub-1.62V operation.
What thermal derating applies to the MAX1589ETT150+ in its TDFN package?
The MAX1589ETT150+ TDFN package has a maximum power dissipation of 1951mW at +70°C ambient, derating at 24.4mW/°C above that. With θJA ≈ 41°C/W on a 1in² 1oz copper pad, junction temperature rise is calculated as TJ = TA + (IOUT × (VIN − 1.5V)) × 41°C/W - exceeding +150°C violates absolute maximum ratings.
MAX1589ETT150+ 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):
- 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:
- 6-TDFN (3x3)
MAX1589ETT150+ FAQ
1.How can I place an order for MAX1589ETT150+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1589ETT150+ 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 MAX1589ETT150+ reliable?
The price and inventory of MAX1589ETT150+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1589ETT150+ is usually 5 days.
3.What payment methods are accepted for MAX1589ETT150+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1589ETT150+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1589ETT150+?
MAX1589ETT150+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1589ETT150+ 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 MAX1589ETT150+?
For technical support, including MAX1589ETT150+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1589ETT150+ requirements.
6.How does Aetrix verify that MAX1589ETT150+ is sourced from the original manufacturer or authorized distributors?
All MAX1589ETT150+ 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 MAX1589ETT150+ meets industry standards.
7.What is the process for return or replacement of MAX1589ETT150+?
All MAX1589ETT150+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1589ETT150+, 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 MAX1589ETT150+ part is unused and in its original packaging.
Return procedure for MAX1589ETT150+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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