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Analog Devices Inc./Maxim Integrated MAX1792EUA18+T
- Part No.:
- MAX1792EUA18+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX1792EUA18+T.pdf
- Description:
- IC REG LIN POS ADJ 500MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,221
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Product details
Overview
MAX1792EUA18+T from Maxim Integrated is a 500mA, low-dropout linear regulator with preset 1.8V output, operating from +2.5V to +5.5V input, featuring 130mV dropout at full load, ±1% output voltage accuracy over temperature, and integrated active-low open-drain reset with 4ms timeout. It delivers stable power to core logic rails in portable battery-powered systems.
For engineers reviewing the MAX1792EUA18+T datasheet, MAX1792EUA18+T pinout, MAX1792EUA18+T application, or MAX1792EUA18+T equivalent, key selection considerations include guaranteed 500mA output under 130mV dropout, 80µA ground current independent of load, 0.1µA shutdown current, thermal overload protection at +170°C, and compatibility with 3.3µF low-ESR output capacitors for stability.
Technical Context
The MAX1792EUA18+T employs an internal PMOS pass transistor with 0.25Ω RDS(ON), enabling low dropout and eliminating base-drive current penalties typical of PNP regulators. Its Dual Mode™ architecture selects between factory-trimmed 1.8V output (SET tied to GND) and adjustable mode (via external resistor divider on SET pin).
It integrates a 1.25V reference, error amplifier, thermal sensor, current-limit circuitry (0.55–1.8A short-circuit limit), and open-drain RST output that asserts low when VOUT falls below 93% of nominal and releases after 4ms delay upon recovery. Shutdown disables regulation and pulls OUT low via a 5kΩ internal resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Preset 1.8V ±1% (at IOUT = 100mA, TA = 0°C to +85°C); ensures stable core supply for 1.8V logic without external feedback components. |
| Max Output Current | 500mA guaranteed (IOUT = 500mA, VIN ≥ VOUT + 0.5V); supports moderate-power digital subsystems such as USB PHYs or memory interfaces. |
| Dropout Voltage | 130mV at 500mA (VOUT = 1.8V); enables operation down to ~1.93V input, extending usable battery life in single-cell Li-ion or dual-cell alkaline systems. |
| Ground Current | 80µA typical (IOUT = 1mA); remains constant across load, critical for battery runtime estimation and low-power sleep modes. |
| Shutdown Current | 0.1µA maximum (SHDN = GND, VIN = 5.5V); reduces system standby power to sub-microwatt levels for always-on monitoring circuits. |
| Reset Threshold | 93% of nominal VOUT (±3% tolerance); provides reliable power-on reset signaling for microcontrollers when 1.8V rail stabilizes. |
| Thermal Shutdown | Activates at +170°C with 20°C hysteresis; prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
MAX1792EUA18+T uses the 8-pin Power-µMAX package (U8E+2 outline) with exposed thermal pad (EP) on underside. The package measures 3.0mm × 3.0mm × 0.8mm and requires soldering of EP and GND pins to PCB ground plane for optimal thermal performance (θJA reduced by >30%).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 - IN | Input supply connection | Dual pins reduce trace resistance and inductance; must be connected together externally and bypassed with 1µF ceramic capacitor to GND. |
| 3 - RST | Open-drain active-low reset output | Asserts low when VOUT < 93% of 1.8V and holds for ≥4ms after recovery; requires external 100kΩ pullup to OUT for logic-level signal. |
| 4 - SHDN | Active-low shutdown control | Pulling low disables regulation, reduces supply current to 0.1µA, forces RST low, and discharges OUT via internal 5kΩ resistor. |
| 5 - GND | Power and signal ground | Serves as primary electrical return and secondary thermal path; must be connected to large copper area or ground plane with multiple vias. |
| 6 - SET | Voltage-setting input | Tied to GND for 1.8V preset mode; connects to external resistor divider for adjustable outputs (1.25V–5.0V); bias current < ±100nA. |
| 7, 8 - OUT | Regulated output | Dual pins handle up to 500mA; require 3.3µF low-ESR (<0.1Ω) ceramic capacitor to GND; connect together externally for current sharing. |
| EP - Exposed Pad | Thermal interface | Not electrically connected; must be soldered to PCB ground plane to achieve 1.3W continuous power dissipation at TA = +70°C. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed 500mA output | Delivers full rated current even at 130mV dropout, enabling use in high-current, low-voltage rails where headroom is constrained. |
| Low 80µA ground current | Independent of load current, enabling accurate battery-life modeling and minimizing quiescent loss in always-on subsystems. |
| Integrated 4ms reset timer | Provides deterministic power-on reset timing without external RC networks, simplifying BOM and improving reliability over discrete solutions. |
| Thermal shutdown with hysteresis | +170°C trip point and +20°C hysteresis enable safe, self-recovering fault handling during transient overloads or inadequate heatsinking. |
| Exposed thermal pad (EP) | Reduces junction-to-board thermal resistance by >40%, allowing 1.3W dissipation in compact 3mm × 3mm footprint without external heatsinks. |
| 0.1µA shutdown current | Enables true zero-power standby in battery-backed systems, supporting multi-year shelf life in IoT endpoint devices. |
Applications
| Smartphone Application Processor Core Rail | USB 2.0 Hub I/O Power |
|---|---|
|
Use Scenario: Powers 1.8V core logic of application processors in smartphones during active and burst-mode operation. IC Role / Device Role / Timing Role: Primary LDO supplying clean, regulated 1.8V to processor core domain with fast transient response to dynamic load changes. Use Value: 130mV dropout extends usable battery voltage range; 500mA rating handles CPU burst currents; 80µA ground current minimizes idle drain. |
Use Scenario: Supplies 1.8V to USB 2.0 transceiver I/O buffers and PHY logic in portable docking stations. IC Role / Device Role / Timing Role: Point-of-load regulator ensuring stable 1.8V for high-speed data interface, synchronized with USB enumeration timing. Use Value: 4ms RST output provides reliable POR signal to hub controller; ±1% accuracy maintains USB signaling margin; low noise preserves bit-error rate. |
| Industrial Handheld Terminal Display Backlight Driver Bias | Medical Wearable Sensor Signal Chain Reference |
|
Use Scenario: Generates 1.8V bias for white LED driver ICs powering transflective LCD backlights in rugged handheld terminals. IC Role / Device Role / Timing Role: Precision voltage source for analog front-end biasing, requiring low drift and minimal load regulation error. Use Value: 1.0% load regulation ensures consistent backlight brightness across 1–500mA loads; thermal shutdown protects against enclosure overheating. |
Use Scenario: Provides ultra-stable 1.8V reference for low-noise ADCs and op-amps in battery-powered ECG/PPG sensors. IC Role / Device Role / Timing Role: Low-noise analog supply rail decoupled from noisy digital domains, critical for sub-μV signal integrity. Use Value: 115μVRMS output noise (10Hz–1MHz) and high PSRR (>60dB @ 1kHz) preserve sensor SNR; 0.1µA shutdown enables long sleep cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76318QDBVRQ1 | 500mA output, 250mV dropout at 500mA, ±2% accuracy, no RST output, automotive-grade (-40°C to +125°C) | Lacks integrated reset function; requires external supervisor for POR; better suited for under-hood automotive modules than portable consumer gear | Select when AEC-Q100 qualification and extended temperature range outweigh need for reset functionality. |
| MCP1826-1802E/DB | 500mA output, 350mV dropout at 500mA, ±2% accuracy, 100nA shutdown current, no thermal shutdown | Higher dropout limits battery utilization; no thermal protection increases risk in enclosed designs; lower shutdown current benefits ultra-low-power sleep | Prefer only in space-constrained, thermally benign environments where 0.1µA shutdown is non-negotiable and thermal faults are mitigated externally. |
Compared with TPS76318QDBVRQ1 and MCP1826-1802E/DB, MAX1792EUA18+T uniquely combines 130mV dropout, integrated 4ms reset, and thermal shutdown in a 3mm × 3mm package-enabling longer battery life, simpler system-level POR design, and robust fault handling in portable electronics.
Availability
MAX1792EUA18+T is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, personal digital assistants (PDAs), and USB hubs requiring stable component supply with RoHS-compliant packaging and guaranteed -40°C to +85°C operation.
Supply support for MAX1792EUA18+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX1792 series was designed specifically for portable battery-operated equipment demanding high output current, ultra-low quiescent current, and integrated supervisory functions-including PDAs, cellular phones, and notebook computers.
FAQ
What is the guaranteed output voltage accuracy of the MAX1792EUA18+T over temperature?
The MAX1792EUA18+T guarantees ±1% output voltage accuracy at IOUT = 100mA and TA = 0°C to +85°C. Over the full industrial range (-40°C to +85°C), accuracy degrades to ±3% for preset outputs. This specification ensures reliable 1.8V rail stability for 1.8V logic families without external trimming or calibration.
Does the MAX1792EUA18+T require external components to operate in preset 1.8V mode?
No. The MAX1792EUA18+T operates in preset 1.8V mode when the SET pin is connected directly to GND. Only two external capacitors are required: a 1µF ceramic capacitor from IN to GND and a 3.3µF low-ESR ceramic capacitor from OUT to GND. No resistors or additional supervision circuitry are needed for basic regulation.
How does the RST output of the MAX1792EUA18+T behave during shutdown?
During shutdown (SHDN = GND), the RST output of the MAX1792EUA18+T is actively held low regardless of the output voltage level. This behavior provides a deterministic reset assertion during power-down sequences, ensuring microcontrollers enter known states before main power removal. RST returns to high-impedance only after SHDN is released and VOUT recovers to 93% of 1.8V for ≥4ms.
Can the MAX1792EUA18+T safely drive a 500mA load continuously in a standard PCB layout?
Yes, but thermal design is critical. The MAX1792EUA18+T can deliver 500mA continuously only if the exposed pad (EP) and GND pin are soldered to a minimum 1cm² copper area on the PCB's inner or outer layer, with ≥4 thermal vias to internal ground planes. Without this, junction temperature may exceed +150°C, triggering thermal shutdown or reducing lifetime.
What is the minimum input voltage required for the MAX1792EUA18+T to maintain regulation at 500mA?
The minimum input voltage for the MAX1792EUA18+T to maintain regulation at 500mA is 1.93V (1.8V + 130mV dropout). However, the absolute minimum specified input is +2.5V per Absolute Maximum Ratings. Therefore, while 1.93V is the theoretical dropout limit, the device requires VIN ≥ +2.5V to guarantee all specifications-including accuracy, noise, and reset functionality-across temperature and process variation.
MAX1792EUA18+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.25V (1.8V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- -
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 250 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Reset
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX-EP|8-uSOP-EP
MAX1792EUA18+T FAQ
1.How can I place an order for MAX1792EUA18+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1792EUA18+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 MAX1792EUA18+T reliable?
The price and inventory of MAX1792EUA18+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1792EUA18+T is usually 5 days.
3.What payment methods are accepted for MAX1792EUA18+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1792EUA18+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1792EUA18+T?
MAX1792EUA18+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1792EUA18+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 MAX1792EUA18+T?
For technical support, including MAX1792EUA18+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1792EUA18+T requirements.
6.How does Aetrix verify that MAX1792EUA18+T is sourced from the original manufacturer or authorized distributors?
All MAX1792EUA18+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 MAX1792EUA18+T meets industry standards.
7.What is the process for return or replacement of MAX1792EUA18+T?
All MAX1792EUA18+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1792EUA18+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 MAX1792EUA18+T part is unused and in its original packaging.
Return procedure for MAX1792EUA18+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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