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Analog Devices Inc./Maxim Integrated MAX1589ETT120+
- Part No.:
- MAX1589ETT120+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX1589ETT120+.pdf
- Description:
- LOW INPUT-VOLTAGE, 500MILLIAMP L
- Quantity:
- Payment:
- Shipping:
Inventory:1,816
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Product details
Overview
The MAX1589ETT120+ from Maxim Integrated is a low-dropout linear regulator with integrated active-low open-drain RESET output, designed for battery-powered portable electronics. It operates from 1.62V to 3.6V input, delivers guaranteed 500mA output current, features ±0.5% initial output voltage accuracy at 1.20V, and maintains only 175mV dropout at full load - enabling extended runtime in PDAs, digital cameras, and cellular handsets.
For engineers reviewing the MAX1589ETT120+ datasheet, MAX1589ETT120+ pinout, MAX1589ETT120+ application, or MAX1589ETT120+ equivalent, key selection criteria include its 1.20V preset output, TDFN-6 (3mm × 3mm, <0.8mm height) RoHS-compliant package, 70ms RESET delay, thermal-overload protection, and logic-controlled shutdown with sub-1µA off-state current.
Technical Context
The MAX1589ETT120+ uses an internal P-channel MOSFET pass transistor (RDS(ON) = 0.33Ω) to achieve low dropout and supply-current independence from load or input-output differential. Its error amplifier compares a precision bandgap reference against a fixed internal feedback divider to regulate the 1.20V output.
RESET functionality is implemented via a dedicated power-good comparator monitoring VOUT, asserting active-low for ≥70ms after regulation is achieved and deasserting immediately upon VOUT falling below 82.5% of nominal. Shutdown control is active-low, disconnecting the output and pulling it to GND via a 1.5kΩ resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.20V - factory-trimmed, no external resistors required. |
| Max Output Current | 500mA continuous - supports core logic rails in portable SoC applications. |
| Dropout Voltage | 175mV at 500mA - enables operation down to ~1.37V input for Li-ion end-of-discharge. |
| Output Accuracy | ±0.5% at +25°C, ±1.5% over -40°C to +85°C - ensures stable microcontroller core voltage. |
| RESET Delay | 70–100ms - provides reliable power-on reset timing for embedded µCs without external RC. |
| Quiescent Current | 90µA typical at 500mA load - minimizes standby drain in always-on subsystems. |
| Shutdown Current | <1µA - critical for long-term battery retention in sleep modes. |
Pinout & Package
MAX1589ETT120+ is housed in a 6-pin thin DFN (TDFN) package measuring 3mm × 3mm × 0.8mm with exposed thermal pad (EP), rated for -40°C to +85°C operation. The EP must be soldered to a PCB ground plane for thermal management and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Supply | Accepts 1.62V–3.6V; requires ≥1µF ceramic bypass to GND near pin. |
| 2 (GND) | Ground Reference | Signal and power return; connects internally to EP for thermal conduction. |
| 3 (SHDN) | Active-Low Enable | Pull low to disable regulator and reduce IQ to <1µA; tie high for normal operation. |
| 4 (RESET) | Open-Drain Reset Flag | Asserts low during power-up/brownout; requires external pull-up for µP interface. |
| 5 (I.C.) | Internally Connected | No external connection required; leave floating or tie to GND per layout best practice. |
| 6 (OUT) | Regulated Output | Delivers 1.20V/500mA; bypass with 4.7µF low-ESR ceramic capacitor to GND. |
| EP | Exposed Thermal Pad | Must be soldered to large copper area for thermal dissipation and GND connection. |
Key Features
| Feature | Design Value |
|---|---|
| Preset 1.20V Output | Eliminates external feedback resistors, reducing BOM count and layout sensitivity. |
| 70ms Guaranteed RESET Delay | Ensures deterministic µP initialization timing without external timing components. |
| Thermal-Overload Protection | Shuts down pass transistor above +165°C with 15°C hysteresis, preventing permanent damage. |
| Logic-Controlled Shutdown | Reduces total system quiescent current to sub-1µA, extending battery life in sleep states. |
| Low 175mV Dropout at 500mA | Maximizes usable battery voltage range, especially critical for single-cell Li-ion systems. |
Applications
| Smartphone Application Processor Core Rail | Digital Still Camera Image Sensor Bias |
|---|---|
Use Scenario: Powers ARM-based application processor core (e.g., Cortex-A series) requiring stable 1.20V at up to 500mA during burst processing. IC Role / Device Role / Timing Role: Primary LDO regulator delivering clean, low-noise core voltage with RESET signaling for safe boot sequence. Use Value: 175mV dropout extends usable battery range by ~120mV vs. legacy 300mV LDOs, directly increasing video recording time. |
Use Scenario: Supplies bias voltage to CMOS image sensor analog front-end during high-speed capture sequences. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO with RESET flag ensuring sensor initialization completes before exposure begins. Use Value: ±0.5% output accuracy prevents ADC gain drift; 35mV load transient overshoot (100mA→500mA) avoids pixel saturation artifacts. |
| Notebook Computer USB-C Port Controller Rail | Industrial Hand-Held Scanner Logic Supply |
Use Scenario: Provides 1.20V rail to USB-C port controller IC in ultrabook designs with tight thermal constraints. IC Role / Device Role / Timing Role: Compact TDFN-6 regulator with thermal shutdown protecting against sustained overcurrent during hot-plug events. Use Value: 0.8mm profile fits under slim bezels; 1.951W max power dissipation at +70°C enables continuous 500mA delivery without derating. |
Use Scenario: Powers FPGA-based barcode decoder and Bluetooth LE radio in ruggedized handheld scanners. IC Role / Device Role / Timing Role: Single-chip solution combining regulated 1.20V supply and power-good assertion for firmware watchdog synchronization. Use Value: Active-low RESET output interfaces directly with FPGA reset input; shutdown current <1µA enables multi-week shelf-life on primary battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B122MR-G | 1.2V fixed output, 500mA, SOT-25 package; no RESET output; 250mV dropout at 500mA. | Lacks integrated RESET - requires external supervisor IC for power-on sequencing. | Choose when board space allows separate reset IC and higher dropout is acceptable. |
| Analog Devices ADP160ACBZ-1.2-R7 | 1.2V fixed output, 150mA max, 165mV dropout, WLCSP-6 package; no RESET. | Lower current rating limits use to low-power peripherals; no reset function. | Choose only for ultra-low-power subsystems where 150mA suffices and RESET is handled elsewhere. |
Compared with the MAX1589ETT120+, the XC6219B122MR-G saves cost but adds design complexity due to missing RESET, while the ADP160ACBZ-1.2-R7 reduces footprint yet sacrifices 70% of output current capability - making MAX1589ETT120+ the sole option integrating 500mA delivery, 1.20V accuracy, and guaranteed 70ms RESET in one TDFN-6 device.
Availability
MAX1589ETT120+ is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, and digital still cameras requiring stable component supply with RoHS compliance and industrial temperature support.
Supply support for MAX1589ETT120+ 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 portable, industrial, and communications systems.
The MAX1589 series was designed specifically for low-input-voltage, high-current battery-powered applications demanding tight regulation, integrated power supervision, and compact packaging - targeting next-generation mobile computing and imaging devices.
FAQ
What is the exact output voltage of the MAX1589ETT120+?
The MAX1589ETT120+ delivers a factory-trimmed fixed output voltage of 1.20V. This value is laser-adjusted during production and specified with ±0.5% initial accuracy at +25°C, tightening to ±1.5% across the full -40°C to +85°C operating range. The "120" suffix in the part number explicitly denotes the 1.20V output variant, confirmed in Maxim's Selector Guide and ordering table.
Does the MAX1589ETT120+ require external resistors to set its output voltage?
No, the MAX1589ETT120+ does not require external resistors. It uses an internal precision voltage divider and trimmed reference to deliver a fixed 1.20V output. The device is part of the MAX1589 family with seven factory-preset voltages (0.75V to 3.0V); the "120" suffix confirms this unit is configured for 1.20V, eliminating feedback network design effort and component count.
What is the function of the I.C. pin on the MAX1589ETT120+?
The I.C. pin (Pin 5) on the MAX1589ETT120+ is internally connected and serves no external circuit function. Maxim's Pin Description section explicitly states it should be left floating or tied to GND - no active signal or biasing is required. This pin is reserved for internal test or process monitoring and has no impact on regulation, RESET, or shutdown behavior.
How does the RESET output behave during power-up and brownout events?
The MAX1589ETT120+ RESET output is an active-low, open-drain signal that remains asserted (low) for at least 70ms after VOUT reaches regulation. It deasserts (goes high-impedance) only after VOUT stabilizes above 82.5% of 1.20V. During brownout, RESET falls immediately if VOUT drops below that threshold - providing precise, monotonic power-good signaling for microprocessor reset sequencing.
Can the MAX1589ETT120+ operate from a single-cell Li-ion battery throughout its discharge curve?
Yes, the MAX1589ETT120+ supports input voltages from 1.62V to 3.6V, and its 175mV dropout at 500mA allows regulation down to 1.37V input. Since a standard Li-ion cell discharges from ~4.2V to ~2.8V (and can safely reach ~2.5V in many applications), the MAX1589ETT120+ maintains 1.20V output across the entire usable battery range - unlike higher-dropout regulators that cease regulation below ~3.0V.
MAX1589ETT120+ 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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 140 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Current Limit, Enable, Reset
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TDFN-EP (3x3)
MAX1589ETT120+ FAQ
1.How can I place an order for MAX1589ETT120+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1589ETT120+ 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 MAX1589ETT120+ reliable?
The price and inventory of MAX1589ETT120+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1589ETT120+ is usually 5 days.
3.What payment methods are accepted for MAX1589ETT120+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1589ETT120+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1589ETT120+?
MAX1589ETT120+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1589ETT120+ 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 MAX1589ETT120+?
For technical support, including MAX1589ETT120+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1589ETT120+ requirements.
6.How does Aetrix verify that MAX1589ETT120+ is sourced from the original manufacturer or authorized distributors?
All MAX1589ETT120+ 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 MAX1589ETT120+ meets industry standards.
7.What is the process for return or replacement of MAX1589ETT120+?
All MAX1589ETT120+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1589ETT120+, 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 MAX1589ETT120+ part is unused and in its original packaging.
Return procedure for MAX1589ETT120+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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