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Analog Devices Inc./Maxim Integrated MAX1792EUA25+
- Part No.:
- MAX1792EUA25+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX1792EUA25+.pdf
- Description:
- IC REG LIN POS ADJ 500MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:240
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Product details
Overview
MAX1792EUA25+ from Maxim Integrated is a 500mA, low-dropout linear regulator with preset 2.5V output voltage, ±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 such as notebook computers and cellular handsets.
For engineers reviewing the MAX1792EUA25+ datasheet, MAX1792EUA25+ pinout, MAX1792EUA25+ application, or MAX1792EUA25+ equivalent, key selection criteria include guaranteed 500mA output under dropout conditions, 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 stable regulation.
Technical Context
The MAX1792EUA25+ implements a P-channel MOSFET pass element with 0.25Ω RDS(ON), enabling low dropout and eliminating base-drive current loss typical of PNP-based regulators. Its Dual Mode™ architecture selects between factory-trimmed 2.5V output (SET tied to GND) and adjustable mode via external resistor divider (SET floating or biased).
Reset functionality monitors VOUT against 93% of nominal output voltage, asserting active-low RST for ≥4ms after regulation recovery. Thermal shutdown activates at +170°C with 20°C hysteresis, and current limiting provides 0.8A typical short-circuit protection-doubling to 1.6A when VOUT is within 4% of nominal for transient robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Preset 2.5V ±1% (at IOUT = 100mA, TA = 0°C to +85°C); ensures stable core logic supply without external feedback components. |
| Max Output Current | 500mA guaranteed continuous output; supports high-current digital subsystems like USB hubs or baseband processors. |
| Dropout Voltage | 360mV max at 500mA (VOUT = 2.5V); enables operation down to VIN = 2.86V, extending usable battery life in Li-ion and multi-cell alkaline systems. |
| Ground Current | 80µA typical at light load, 110µA max at 500mA; minimizes quiescent drain during standby, critical for always-on functions in PDAs. |
| Shutdown Current | 0.1µA max (IOFF); reduces system-level leakage to sub-microamp levels during deep sleep modes. |
| Reset Threshold | 93% of nominal VOUT (2.325V), with 4ms release delay; provides reliable power-on-reset timing for microcontrollers without external RC networks. |
| Thermal Shutdown | Activates at +170°C junction temperature with 20°C hysteresis; prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
The MAX1792EUA25+ is housed in an 8-pin Power-µMAX package (U8E+2 outline) with an exposed thermal pad (EP) on the underside for enhanced heat dissipation. The package measures 3.0mm × 3.0mm × 0.8mm and requires soldering of both EP and GND pins to a large PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 - IN | Regulator input supply | Dual pins reduce trace resistance and inductance; must be connected together externally and bypassed with 1µF capacitor to GND. |
| 3 - RST | Open-drain active-low reset output | Asserts low when VOUT < 93% of 2.5V; requires external 100kΩ pullup to OUT for logic-level POR signal to µC. |
| 4 - SHDN | Active-low shutdown control | Pulling low disables regulation, discharges OUT via internal 5kΩ resistor, and forces RST low; accepts up to +6V logic regardless of VIN/VOUT. |
| 5 - GND | Power and signal ground | Serves as primary electrical reference 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 external resistive divider for adjustable outputs (1.25V–5.0V). |
| 7, 8 - OUT | Regulated output | Dual pins handle up to 500mA; require 3.3µF low-ESR ceramic capacitor to GND (4.7µF if VOUT < 2V). |
| EP - Exposed Pad | Thermal interface | Not electrically connected; must be soldered to PCB ground plane to achieve θJA ≤ 65°C/W and sustain 1.3W power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ output selection | Factory-trimmed 2.5V output enabled by grounding SET; eliminates external resistors and calibration overhead in fixed-voltage designs. |
| PMOS pass transistor | 0.25Ω RDS(ON) enables low dropout and eliminates base-drive current, maintaining 80µA ground current even at 500mA load. |
| Integrated reset with timeout | 4ms programmable release delay ensures clean microcontroller boot sequencing without external timing components or firmware delays. |
| Thermal foldback protection | +170°C shutdown with 20°C hysteresis prevents latch-up during sustained overload; enables pulsed operation rather than catastrophic failure. |
| Low-ESR capacitor compatibility | Stable with 3.3µF ceramic output capacitors (ESR < 0.1Ω); avoids tantalum or electrolytic dependencies and reduces board area. |
Applications
| Cellular Handsets | Notebook Computers |
|---|---|
Use Scenario: Powering RF transceiver bias rails and baseband processor I/O banks requiring tight voltage tolerance and fast transient response. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 2.5V to noise-sensitive analog sections while rejecting switching noise from DC/DC converters. Use Value: ±1% output accuracy and 115µVRMS output noise ensure minimal EVM degradation in LTE/WCDMA front-end stages. |
Use Scenario: Supplying 2.5V to DDR memory termination (VTT) or PCIe auxiliary rails where low quiescent current extends battery runtime. IC Role / Device Role / Timing Role: Secondary LDO supporting always-on subsystems during suspend-to-RAM states with 0.1µA shutdown current. Use Value: 80µA ground current at light load and 360mV dropout allow operation from partially depleted 3-cell Li-ion packs (≥2.86V). |
| Personal Digital Assistants (PDAs) | USB Hubs |
Use Scenario: Regulating 2.5V for touch controller ASICs and display driver interfaces in compact handheld form factors. IC Role / Device Role / Timing Role: Compact-area LDO with exposed thermal pad enabling high-power density in space-constrained PCB layouts. Use Value: 3.0mm × 3.0mm Power-µMAX package with EP reduces thermal resistance by >40% versus standard µMAX, sustaining 500mA without derating. |
Use Scenario: Providing isolated 2.5V power to USB 2.0 PHY transceivers and hub controller logic in bus-powered configurations. IC Role / Device Role / Timing Role: Input-supply tolerant LDO accepting 2.5V–5.5V inputs from upstream ports or wall adapters. Use Value: Input undervoltage lockout (2.15V typ.) prevents erratic behavior during hot-plug events or brownout conditions on shared VBUS lines. |
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 output, 200mV dropout at 250mA, 1.5% output accuracy, SOT-23-5 package | Limited to lower current loads; lacks reset output and thermal foldback | Select when board space is constrained and 250mA suffices; not suitable for 500mA or reset-critical systems. |
| MCP1825-2502E/DB | 500mA output, 350mV dropout at 500mA, ±2% accuracy, 6-pin SOT-23 package | No reset output; higher ground current (120µA typ.); no Dual Mode adjustability | Choose for cost-sensitive designs where reset signaling is handled externally and ±2% tolerance is acceptable. |
Compared with MAX1792EUA25+, TPS76325DBVR offers smaller footprint but half the current capability and no reset function, while MCP1825-2502E/DB matches output current but sacrifices accuracy, reset, and thermal hysteresis-making MAX1792EUA25+ optimal for precision, safety-critical, or thermally demanding portable applications.
Availability
MAX1792EUA25+ is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, personal digital assistants (PDAs), and USB hubs requiring stable component supply across industrial temperature ranges (-40°C to +85°C) and long-term production continuity.
Supply support for MAX1792EUA25+ 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 battery-powered portable electronics requiring ultra-low quiescent current, high output accuracy, and integrated system supervision features like reset and thermal protection.
FAQ
What is the maximum input voltage for the MAX1792EUA25+?
The MAX1792EUA25+ supports an absolute maximum input voltage of +6V on the IN pin, but its operational input range is specified from +2.5V to +5.5V. Operation outside this range may cause permanent damage or violate functional specifications. For reliable 2.5V output regulation, VIN must exceed VOUT by at least the dropout voltage (360mV max at 500mA), meaning minimum functional VIN is 2.86V.
Does the MAX1792EUA25+ require external resistors to set the 2.5V output?
No, the MAX1792EUA25+ does not require external resistors to deliver its preset 2.5V output. The device uses internal laser-trimmed feedback resistors; simply tie the SET pin to GND to activate preset mode. External resistors are only needed if adjusting the output voltage beyond 2.5V using the adjustable configuration described in the datasheet.
How does the RST pin function on the MAX1792EUA25+?
The RST pin on the MAX1792EUA25+ is an open-drain, active-low reset output that asserts low when VOUT falls below 93% of nominal (2.325V) and remains low for at least 4ms after VOUT recovers. To generate a logic-high signal, connect a 100kΩ pullup resistor from RST to VOUT. During shutdown, RST is forced low regardless of output voltage.
Can the MAX1792EUA25+ operate with a 3.3µF ceramic output capacitor?
Yes, the MAX1792EUA25+ is explicitly characterized and stabilized with a 3.3µF ceramic output capacitor having ESR < 0.1Ω. This value meets all stability requirements across temperature and load conditions. For VOUT < 2V, the datasheet recommends upgrading to 4.7µF, but for the 2.5V output of MAX1792EUA25+, 3.3µF is fully compliant and optimal.
What thermal considerations apply to the MAX1792EUA25+ in high-current operation?
The MAX1792EUA25+ features an exposed thermal pad (EP) that must be soldered to a PCB ground plane to achieve safe thermal performance. Without proper EP connection, power dissipation is limited to ~0.5W. With full EP and GND thermal coupling, the device sustains 1.3W at +70°C ambient. At 500mA and 300mV dropout, power dissipation is 150mW-well within limits if EP is correctly implemented.
MAX1792EUA25+ 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:
- Tube
- 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+ FAQ
1.How can I place an order for MAX1792EUA25+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1792EUA25+ 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+ reliable?
The price and inventory of MAX1792EUA25+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1792EUA25+ is usually 5 days.
3.What payment methods are accepted for MAX1792EUA25+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1792EUA25+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1792EUA25+?
MAX1792EUA25+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1792EUA25+ 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+?
For technical support, including MAX1792EUA25+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1792EUA25+ requirements.
6.How does Aetrix verify that MAX1792EUA25+ is sourced from the original manufacturer or authorized distributors?
All MAX1792EUA25+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX1792EUA25+?
All MAX1792EUA25+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1792EUA25+, 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+ part is unused and in its original packaging.
Return procedure for MAX1792EUA25+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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