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Analog Devices Inc./Maxim Integrated MAX1792EUA33-TG068
- Part No.:
- MAX1792EUA33-TG068
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX1792EUA33-TG068.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
MAX1792EUA33-TG068 from Maxim Integrated is a 3.3V fixed-output, 500mA low-dropout linear regulator featuring ±1% output voltage accuracy, 130mV dropout at full load, 80µA ground current, and integrated active-low open-drain reset with 4ms timeout - designed for power management in portable battery-powered systems including notebook computers and cellular handsets.
For engineers reviewing the MAX1792EUA33-TG068 datasheet, MAX1792EUA33-TG068 pinout, MAX1792EUA33-TG068 application, or MAX1792EUA33-TG068 equivalent, key selection criteria include guaranteed 500mA output under 130mV dropout, thermal shutdown at 170°C, 0.1µA shutdown current, and compatibility with 3.3µF low-ESR output capacitors for stable regulation in space-constrained designs.
Technical Context
The MAX1792EUA33-TG068 employs an internal PMOS pass transistor (RDS(ON) ≈ 0.25Ω) enabling low quiescent current independent of load and eliminating base-drive losses typical of PNP-based regulators. Its Dual Mode™ architecture selects between factory-trimmed 3.3V output (SET = GND) or adjustable mode via external resistor divider (SET biased to 1.25V).
Regulation relies on a 1.25V reference and error amplifier comparing feedback from either internal resistive divider (preset mode) or external SET node. The RST output asserts low when VOUT falls below 93% of nominal (3.069V), releasing after 4ms once regulation is restored - functioning as a precise POR signal for microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% over -40°C to +85°C, ensuring stable core logic supply without external resistors. |
| Max Output Current | 500mA RMS guaranteed, supporting high-current peripherals like USB hubs or baseband ICs in portable devices. |
| Dropout Voltage | 130mV at 500mA load, enabling operation down to VIN = 3.43V - critical for extending battery life in Li-ion (3.0–4.2V) systems. |
| Ground Current | 80µA typical at light load, rising to 110µA at 500mA, minimizing standby power loss in always-on subsystems. |
| Shutdown Current | 0.1µA max, allowing deep-sleep modes in PDAs and notebooks without compromising battery shelf life. |
| Reset Threshold | 93% of nominal VOUT (3.069V), with 4ms release delay - provides reliable power-on-reset timing for microcontrollers. |
| Thermal Shutdown | Activates at 170°C junction temperature with 20°C hysteresis, enabling safe pulsed operation during overload without latch-off. |
Pinout & Package
The MAX1792EUA33-TG068 is housed in an 8-pin Power-µMAX package (U8E+2) with exposed thermal pad (EP) on underside, requiring soldering 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 for low-inductance routing; accepts 2.5V–5.5V input; requires 1µF bypass to GND near pins. |
| 3 RST | Open-drain active-low reset output | Pulls low when VOUT < 3.069V; needs external 100kΩ pullup to OUT for logic-level POR signal. |
| 4 SHDN | Active-low shutdown control | Drives device into 0.1µA sleep mode; tolerant to voltages up to +6V regardless of VIN/VOUT. |
| 5 GND | Power and thermal ground | Primary electrical ground path and heatsink; must be connected to large copper area or ground plane. |
| 6 SET | Voltage-setting input | Internally grounded for 3.3V preset mode; connects to external resistor divider for adjustable outputs (1.25V–5.0V). |
| 7, 8 OUT | Regulated output | Dual pins for 500mA sourcing; requires 3.3µF low-ESR capacitor to GND; connect both externally. |
| EP | Exposed thermal pad | Not electrically connected; must be soldered to PCB ground plane to achieve 1.3W power dissipation rating. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS Pass Transistor | 0.25Ω RDS(ON) enables 130mV dropout and eliminates base-drive current - reducing ground current vs. PNP regulators. |
| Dual Mode™ Operation | Automatic selection between factory-trimmed 3.3V output (SET = GND) or adjustable mode (SET = 1.25V divider) - simplifies BOM across voltage variants. |
| Integrated Reset Function | Guaranteed 4ms RST release delay after VOUT recovery ensures clean microcontroller boot sequence without external timing components. |
| Short-Circuit Robustness | Indefinite output short-circuit tolerance with foldback current limiting - protects downstream circuitry during fault conditions. |
| Thermal Protection Hysteresis | 20°C gap between shutdown (170°C) and restart (150°C) prevents thermal oscillation during sustained overload. |
Applications
| USB Hub Power Management | Notebook Computer Core Rail |
|---|---|
|
Use Scenario: Providing regulated 3.3V to USB 2.0 hub controller and port transceivers in compact laptop docking stations. IC Role / Device Role / Timing Role: Primary LDO delivering clean, low-noise 3.3V rail with fast transient response to handle hot-plug current surges. Use Value: 130mV dropout allows operation from shared 3.6V battery rail; 80µA quiescent current minimizes standby drain during USB suspend. |
Use Scenario: Supplying 3.3V to embedded controller (EC), keyboard controller, and sensor interface in ultraportable notebooks. IC Role / Device Role / Timing Role: Always-on LDO maintaining system management functions during S3/S4 sleep states. Use Value: 0.1µA shutdown current extends battery shelf life; RST output provides hardware POR to EC upon AC adapter reconnection. |
| Cellular Phone Baseband Supply | Portable PDA System Rail |
|
Use Scenario: Powering baseband processor I/O and memory interfaces in dual-mode GSM/UMTS handsets with tight thermal constraints. IC Role / Device Role / Timing Role: High-accuracy 3.3V LDO with thermal foldback protecting against RF PA-induced board heating. Use Value: ±1% output accuracy ensures reliable DDR I/O signaling margins; exposed pad enables 1.3W dissipation in 5mm × 5mm footprint. |
Use Scenario: Delivering main system voltage to ARM9 application processor and NAND flash in handheld PDAs with 3.7V Li-ion battery. IC Role / Device Role / Timing Role: Main system LDO supporting dynamic voltage scaling and rapid load transitions during GUI rendering. Use Value: 18mV load-transient deviation (5mA→500mA) maintains processor stability; 3.3µF COUT ensures stability with ceramic capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P332MR | 300mA output, 250mV dropout at full load, no reset output, SOT-23-5 package | Lacks RST functionality and thermal shutdown hysteresis; suitable only for non-critical, low-power rails | Select when cost and footprint are prioritized over reset supervision and thermal robustness. |
| Analog Devices ADM7172ACPZ-3.3-R7 | 2A output, 125mV dropout, PSRR > 70dB @ 1kHz, 10-lead LFCSP package | Higher current and superior noise rejection, but larger size and higher quiescent current (250µA) | Choose for high-performance applications needing >500mA or stringent noise requirements, accepting larger layout area. |
Compared with MAX1792EUA33-TG068, the XC6206P332MR trades reset supervision and thermal safety for minimal size/cost, while the ADM7172 offers higher current and PSRR at the expense of quiescent current and footprint - making MAX1792EUA33-TG068 optimal for space-constrained, battery-sensitive 500mA applications requiring integrated POR and thermal resilience.
Availability
MAX1792EUA33-TG068 is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, and USB hubs requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for MAX1792EUA33-TG068 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 product line delivers ultra-low-quiescent-current LDOs with integrated reset and thermal protection for portable battery-operated equipment - targeting design-in longevity and reliability in space-constrained, thermally sensitive systems.
FAQ
What is the maximum input voltage supported by the MAX1792EUA33-TG068?
The MAX1792EUA33-TG068 supports an input voltage range of +2.5V to +5.5V. Absolute maximum ratings specify IN-to-GND stress limit of -0.3V to +6V, but continuous operation above +5.5V may cause permanent damage. For reliable 3.3V regulation, VIN must exceed 3.43V (3.3V + 130mV dropout) under full 500mA load.
Does the MAX1792EUA33-TG068 require external components for basic operation?
Yes, the MAX1792EUA33-TG068 requires a 1µF ceramic capacitor between IN and GND, and a 3.3µF low-ESR (≤0.1Ω) capacitor between OUT and GND for stable regulation. A 100kΩ pullup resistor from RST to OUT is needed if using the reset function. No external components are required for the 3.3V preset mode beyond these.
How does the RST output behave during shutdown of the MAX1792EUA33-TG068?
When SHDN is pulled low, the MAX1792EUA33-TG068 enters shutdown mode and forces RST low regardless of VOUT level. This behavior ensures a deterministic reset state during power-down sequences. RST remains low until SHDN is released and VOUT recovers to ≥93% of 3.3V, then releases after the 4ms timeout.
Can the MAX1792EUA33-TG068 be used with output voltages other than 3.3V?
No - the MAX1792EUA33-TG068 is factory-trimmed for fixed 3.3V output. While the MAX1792 family supports adjustable mode via the SET pin, this specific variant (suffix "33") configures the internal feedback divider for 3.3V; connecting SET to GND activates the preset mode, and external resistor networks are not functional for voltage adjustment on this part number.
What thermal design considerations apply to the MAX1792EUA33-TG068 package?
The MAX1792EUA33-TG068 uses a Power-µMAX package with an exposed thermal pad (EP). To achieve its 1.3W power dissipation rating, EP and pin 5 (GND) must be soldered to a large PCB ground plane using multiple thermal vias. Failure to do so risks exceeding the +150°C junction limit, triggering thermal shutdown at 170°C and degrading long-term reliability.
MAX1792EUA33-TG068 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:
- Bulk
- 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 (3.3V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.25V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 250 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- 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:
- 8-uMAX-EP|8-uSOP-EP
MAX1792EUA33-TG068 FAQ
1.How can I place an order for MAX1792EUA33-TG068 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1792EUA33-TG068 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 MAX1792EUA33-TG068 reliable?
The price and inventory of MAX1792EUA33-TG068 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1792EUA33-TG068 is usually 5 days.
3.What payment methods are accepted for MAX1792EUA33-TG068?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1792EUA33-TG068 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1792EUA33-TG068?
MAX1792EUA33-TG068 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1792EUA33-TG068 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 MAX1792EUA33-TG068?
For technical support, including MAX1792EUA33-TG068 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1792EUA33-TG068 requirements.
6.How does Aetrix verify that MAX1792EUA33-TG068 is sourced from the original manufacturer or authorized distributors?
All MAX1792EUA33-TG068 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 MAX1792EUA33-TG068 meets industry standards.
7.What is the process for return or replacement of MAX1792EUA33-TG068?
All MAX1792EUA33-TG068 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1792EUA33-TG068, 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 MAX1792EUA33-TG068 part is unused and in its original packaging.
Return procedure for MAX1792EUA33-TG068:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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