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Analog Devices Inc./Maxim Integrated MAX1792EUA25+T
- Part No.:
- MAX1792EUA25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX1792EUA25+T.pdf
- Description:
- IC REG LIN POS ADJ 500MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,116
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Product details
Overview
MAX1792EUA25+T from Maxim Integrated is a 500mA, low-dropout linear regulator with preset 2.5V output, ±1% accuracy over temperature, 130mV dropout at full load, and integrated active-low open-drain reset output with 4ms timeout. It uses an internal PMOS pass transistor and operates from +2.5V to +5.5V input, targeting power rails in portable battery-powered systems.
For engineers reviewing the MAX1792EUA25+T datasheet, MAX1792EUA25+T pinout, MAX1792EUA25+T application, or MAX1792EUA25+T equivalent, key selection criteria include guaranteed 500mA output under 2.5V output regulation, thermal shutdown at +170°C, 0.1µA shutdown current, reset threshold at 93% of nominal VOUT, and compatibility with 3.3µF low-ESR output capacitors for stable operation.
Technical Context
The MAX1792EUA25+T implements a P-channel MOSFET pass element with 0.25Ω RDS(ON), enabling low dropout and load-independent 80µA ground current. Its Dual Mode™ architecture selects between factory-trimmed 2.5V output (SET tied to GND) and adjustable mode via external resistor divider (SET biased at 1.25V).
It integrates a 1.25V reference, error amplifier, thermal sensor, current-limit logic (0.8A typical), and open-drain RST output with 93% VOUT threshold and 4ms release delay. Shutdown disables regulation and pulls OUT low via 5kΩ internal resistor while holding RST low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Preset 2.5V ±1% (at IOUT = 100mA, TA = +85°C); ensures stable core voltage for 2.5V logic domains without external feedback components. |
| Max Output Current | 500mA guaranteed (IOUT = 500mA, VIN ≥ VOUT + 0.5V); supports moderate-power subsystems like USB peripherals or baseband ICs. |
| Dropout Voltage | 360mV max at 500mA (VOUT = 2.5V); enables operation down to VIN = 2.86V, extending usable battery life in single-cell Li-ion or multi-cell alkaline systems. |
| Ground Current | 80µA typical (IOUT = 1mA); remains constant across load, critical for standby current budgeting in always-on circuits. |
| Shutdown Current | 0.1µA max (VIN = 5.5V); reduces system quiescent draw during deep sleep, preserving battery charge over extended idle periods. |
| Reset Threshold | 93% of nominal VOUT (2.325V for 2.5V output), with 4ms release delay; provides deterministic power-on-reset timing for microcontrollers without external supervision ICs. |
| Thermal Shutdown | Activates at +170°C junction temperature with 20°C hysteresis; prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
MAX1792EUA25+T is housed in an 8-pin Power-µMAX package (U8E+2 outline) with exposed thermal pad (EP) on underside. The package delivers 1.3W continuous power dissipation at +70°C ambient and requires soldering EP and GND pins to a large PCB ground plane for optimal thermal performance.
| 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 capacitor to GND for stability. |
| 3 - RST | Open-drain active-low reset output | Asserts low when VOUT < 2.325V; requires external 100kΩ pullup to VOUT to generate logic-level POR signal for µC. |
| 4 - SHDN | Active-low shutdown control | Pulling low disables regulation, reduces IQ to 0.1µA, forces RST low, and discharges VOUT via internal 5kΩ resistor. |
| 5 - GND | Power and signal ground | Serves as primary electrical return and secondary thermal path; must be soldered to ground plane with multiple vias. |
| 6 - SET | Voltage-setting input | Tied to GND for 2.5V preset mode; connects to resistive divider (OUT–SET–GND) for adjustable outputs from 1.25V to 5.0V. |
| 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. |
| EP - Exposed Pad | Thermal interface | Not electrically connected; must be soldered to PCB ground plane to achieve θJA ≤ 65°C/W and sustain full 500mA output. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed 500mA output current | Delivers full rated load across -40°C to +85°C ambient without derating, supporting high-current peripherals in compact portable designs. |
| Low 130mV dropout at 500mA | Enables operation with minimal headroom-e.g., 2.63V input sustains 2.5V output-maximizing battery utilization in space-constrained devices. |
| ±1% output voltage accuracy (preset mode) | Meets tight tolerance requirements for 2.5V analog front-ends or memory interfaces without calibration or trimming circuitry. |
| Active-low open-drain RST with 4ms timeout | Provides clean, glitch-free power-on-reset signaling directly to microcontroller reset inputs without external RC timing networks. |
| 0.1µA shutdown current | Reduces system standby power to sub-microwatt levels, essential for multi-year battery life in IoT sensors and wearables. |
| Integrated thermal and short-circuit protection | Automatically disables output during fault conditions, eliminating need for external current-sense or thermal monitoring circuitry. |
Applications
| Cellular Handsets | Notebook Computers |
|---|---|
Use Scenario: Powering RF transceiver bias rails and baseband processor I/O supplies in dual-mode GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary LDO delivering stable 2.5V to sensitive analog sections, with RST providing POR to application processor upon battery insertion. Use Value: 130mV dropout extends talk time by enabling operation until battery voltage drops to 2.63V, while ±1% accuracy prevents RF distortion from supply variation. |
Use Scenario: Supplying 2.5V to DDR memory termination and chipset auxiliary rails in ultraportable notebooks. IC Role / Device Role / Timing Role: Secondary LDO regulating non-core voltage domain; RST signals valid VDD to EC (Embedded Controller) during boot sequence. Use Value: Dual IN/OUT pins reduce IR drop and improve transient response to memory burst loads; exposed pad enables 500mA delivery within 1.3W thermal envelope. |
| USB Hubs | Base Stations |
Use Scenario: Providing isolated 2.5V power to USB 2.0 PHY and hub controller logic in self-powered desktop hubs. IC Role / Device Role / Timing Role: Local regulation stage decoupling hub IC from upstream 5V bus noise; SHDN enables dynamic power gating per port. Use Value: 80µA quiescent current minimizes no-load loss; 0.1µA shutdown allows individual port disablement without affecting other ports' regulation. |
Use Scenario: Biasing low-noise amplifiers (LNAs) and mixer stages in small-cell femtocell RF front-ends. IC Role / Device Role / Timing Role: Low-noise 2.5V supply with 115µVRMS output noise (10Hz–1MHz); RST monitors supply integrity during AC/DC adapter switchover. Use Value: PSRR >40dB at 1kHz suppresses switching noise from adjacent DC/DC converters; thermal shutdown protects against enclosure overheating. |
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 |
|---|---|---|---|
| TPS76325DBVR | 250mA max output, 120mV dropout at 250mA, ±2% accuracy, no RST output | Lacks reset functionality and half the current capability; suitable only for lower-power 2.5V rails where supervision is handled elsewhere | Select when board space is constrained (SOT-23-5) and reset is provided by system-level supervisor IC |
| MCP1702T-2502E/MB | 250mA max output, 600mV dropout at 250mA, ±2% accuracy, no RST, 3µA quiescent current | Higher dropout limits usable input range; ultra-low IQ benefits long-idle battery apps but sacrifices current capacity and supervision | Prefer for energy-harvesting or coin-cell applications where 250mA suffices and reset is unnecessary |
Compared with MAX1792EUA25+T, both alternatives trade off output current and integrated reset for smaller footprint or lower quiescent current-neither supports 500mA at 2.5V with built-in POR, making MAX1792EUA25+T uniquely suited for compact, high-reliability 2.5V power domains requiring autonomous fault detection.
Availability
MAX1792EUA25+T is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, USB hubs, and base stations requiring stable component supply, RoHS-compliant packaging, and guaranteed -40°C to +85°C operation.
Supply support for MAX1792EUA25+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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX1792 series was designed as a family of low-IQ, high-current LDOs for portable battery-operated equipment-including PDAs, cellular phones, and notebook computers-where dropout voltage, accuracy, and integrated supervision are critical.
FAQ
What is the guaranteed output voltage accuracy of the MAX1792EUA25+T over temperature?
The MAX1792EUA25+T guarantees ±1% output voltage accuracy at IOUT = 100mA and TA = +85°C in preset mode. Over the full operating range (-40°C to +85°C) and 1mA–500mA load, accuracy degrades to ±3%, ensuring reliable 2.5V regulation for precision analog and digital loads without external trimming.
How does the MAX1792EUA25+T implement its reset function, and what is the RST timing behavior?
The MAX1792EUA25+T asserts RST low when VOUT falls below 93% of nominal (2.325V), and holds it low for a minimum of 4ms after VOUT rises above that threshold. RST is open-drain, requiring a pullup resistor (e.g., 100kΩ to VOUT) to generate a logic-high signal for microcontroller reset inputs.
Can the MAX1792EUA25+T be used in adjustable-output configurations, and if so, how is the output voltage set?
Yes-the MAX1792EUA25+T supports adjustable mode by disconnecting SET from GND and connecting it to a resistive divider between OUT and GND. With VSET = 1.25V, output voltage is calculated as VOUT = 1.25V × (1 + R1/R2), allowing adjustment from 1.25V to 5.0V using standard resistor values (R2 = 25kΩ–100kΩ).
What thermal management requirements apply to the MAX1792EUA25+T at full 500mA load?
To sustain 500mA continuously, the MAX1792EUA25+T requires the exposed pad (EP) and GND pin to be soldered to a large PCB ground plane with multiple thermal vias. Without this, junction temperature exceeds +150°C under worst-case conditions (e.g., VIN = 5.5V, VOUT = 2.5V), triggering thermal shutdown at +170°C.
Does the MAX1792EUA25+T support shutdown functionality, and what happens to the output and reset pins during shutdown?
Yes-driving SHDN low places the MAX1792EUA25+T in shutdown mode, reducing supply current to ≤0.1µA. During shutdown, the pass transistor disconnects IN from OUT, RST is forced low regardless of VOUT, and OUT is actively discharged through an internal 5kΩ resistor to ground.
MAX1792EUA25+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 (2.5V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.36V @ 500mA
- 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
MAX1792EUA25+T FAQ
1.How can I place an order for MAX1792EUA25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1792EUA25+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 MAX1792EUA25+T reliable?
The price and inventory of MAX1792EUA25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1792EUA25+T is usually 5 days.
3.What payment methods are accepted for MAX1792EUA25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1792EUA25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1792EUA25+T?
MAX1792EUA25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1792EUA25+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 MAX1792EUA25+T?
For technical support, including MAX1792EUA25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1792EUA25+T requirements.
6.How does Aetrix verify that MAX1792EUA25+T is sourced from the original manufacturer or authorized distributors?
All MAX1792EUA25+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 MAX1792EUA25+T meets industry standards.
7.What is the process for return or replacement of MAX1792EUA25+T?
All MAX1792EUA25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1792EUA25+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 MAX1792EUA25+T part is unused and in its original packaging.
Return procedure for MAX1792EUA25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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