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Analog Devices Inc./Maxim Integrated MAX1792EUA33
- Part No.:
- MAX1792EUA33
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX1792EUA33.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:3,090
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Product details
Overview
MAX1792EUA33 from Maxim Integrated is a 3.3V fixed-output, 500mA low-dropout linear regulator with ±1% output voltage accuracy, 130mV dropout at full load, and 80µA ground current - designed for portable battery-powered systems such as notebook computers and cellular handsets where stable low-noise power delivery is critical.
For engineers reviewing the MAX1792EUA33 datasheet, MAX1792EUA33 pinout, MAX1792EUA33 application, or MAX1792EUA33 equivalent, key selection considerations include its preset 3.3V output, active-low open-drain reset with 4ms timeout, 0.1µA shutdown current, thermal shutdown at +170°C, and compatibility with 1µF input / 3.3µF low-ESR output capacitors.
Technical Context
The MAX1792EUA33 integrates a P-channel MOSFET pass transistor (RDS(ON) ≈ 0.25Ω) enabling low dropout and load-independent quiescent current. Its Dual Mode™ architecture selects between internal preset regulation (3.3V) and external adjustable mode via the SET pin, triggered by VSET < 50mV.
It features an internal 1.25V reference, error amplifier, and dedicated blocks for reset generation (93% VOUT threshold), thermal protection (170°C trip, 20°C hysteresis), and current limiting (0.55–1.8A short-circuit, 1.6A in-regulation).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% over 1mA–500mA load and -40°C to +85°C - ensures stable core logic supply without external feedback components. |
| Dropout Voltage | 130mV at 500mA - enables operation down to VIN = 3.43V, extending usable battery life in Li-ion and multi-cell alkaline systems. |
| Ground Current | 80µA typical at light load, ≤250µA at 500mA - minimizes standby power loss in always-on subsystems. |
| Shutdown Current | 0.1µA - supports ultra-low-power sleep modes in portable devices without compromising wake-up latency. |
| Reset Output | Active-low open-drain RST with 4ms release delay and 93% VOUT threshold - provides reliable power-on-reset signaling to microcontrollers. |
| Thermal Protection | 170°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
| Package | 8-pin Power-µMAX (U8E+2) with exposed thermal pad - delivers 1.3W power dissipation capability when soldered to ground plane. |
Pinout & Package
MAX1792EUA33 is housed in an 8-pin Power-µMAX package (outline 21-0107) with an exposed thermal pad (EP) on the underside. The package requires soldering of both GND (Pin 5) and EP to the PCB ground plane for optimal thermal performance and power handling up to 1.3W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 IN | Regulator input supply | Accepts 2.5V–5.5V input; must be bypassed with 1µF capacitor to GND; pins are internally connected and must be tied together externally. |
| 3 RST | Open-drain active-low reset output | Pulls low when VOUT < 93% of 3.3V and holds low for ≥4ms after recovery; requires external pullup (e.g., 100kΩ to OUT) for logic-level output. |
| 4 SHDN | Active-low shutdown control | Drives regulator into 0.1µA sleep state when pulled low; connects to IN for normal operation; tolerates up to +6V regardless of VIN/VOUT. |
| 5 GND | Power and signal ground | Serves as electrical return path and primary thermal conduction path; must be soldered to large copper area or ground plane. |
| 6 SET | Voltage-setting input | Internally grounded for 3.3V preset mode; connects to resistive divider for adjustable outputs (1.25V–5.0V); bias current <±100nA. |
| 7, 8 OUT | Regulated output | Delivers up to 500mA; bypassed with 3.3µF low-ESR capacitor; pins are internally connected and must be tied together externally. |
| EP | Exposed thermal pad | Not electrically connected; must be soldered to PCB ground plane to reduce θJA and enable full 1.3W power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Preset 3.3V output with ±1% accuracy | Eliminates need for external feedback resistors while maintaining tight tolerance across temperature and load - ideal for FPGA I/O, USB PHY, and memory interface rails. |
| 130mV dropout at 500mA | Enables regulation from single-cell Li-ion (3.0V min) or two-cell alkaline (3.2V min) without brownout - extends runtime in space-constrained portable designs. |
| 80µA ground current (typ.) | Reduces no-load power loss by >5× versus legacy LDOs, directly improving battery life in always-on sensor nodes and RTC backup supplies. |
| Active-low open-drain RST with 4ms timeout | Provides deterministic, glitch-free power-on-reset timing independent of input ramp rate - simplifies µC initialization without external RC networks. |
| 0.1µA shutdown current | Allows complete system power gating during deep sleep, meeting sub-1µA system standby targets in wearable and IoT edge devices. |
| Thermal shutdown with 20°C hysteresis | Prevents thermal runaway under sustained overload while allowing automatic recovery once junction cools - avoids manual reset or firmware intervention. |
Applications
| USB Hub Power Management | Notebook Computer Core Rail |
|---|---|
|
Use Scenario: Providing clean, regulated 3.3V power to USB 2.0 transceivers and hub controllers in portable docking stations. IC Role / Device Role / Timing Role: Primary LDO supplying VCC_IO for USB PHY and enumeration logic; RST synchronizes hub initialization with host detection. Use Value: 130mV dropout ensures stable operation during battery sag; 115µVRMS noise prevents bit errors; 0.1µA shutdown enables instant resume from suspend-to-RAM. |
Use Scenario: Delivering 3.3V to embedded controller (EC) and keyboard controller in thin-and-light notebooks. IC Role / Device Role / Timing Role: Always-on LDO powering EC during S3/S5 sleep states; RST asserts POR to EC upon AC adapter insertion or battery insertion. Use Value: ±1% accuracy guarantees EC reset threshold margin; 80µA IQ minimizes battery drain during weeks-long storage; thermal protection prevents failure during fanless operation. |
| Cellular Phone Baseband Supply | Industrial Handheld Terminal |
|
Use Scenario: Regulating 3.3V for baseband processor I/O and RF front-end bias in 4G/LTE smartphones. IC Role / Device Role / Timing Role: Secondary LDO decoupling noisy PMIC outputs; RST signals power-good to application processor before boot sequence begins. Use Value: Low PSRR degradation above 10kHz suppresses switching noise from DC-DC converters; 500mA capacity handles burst transmit loads without droop. |
Use Scenario: Powering ARM Cortex-M7 MCU and industrial Ethernet PHY in ruggedized handheld scanners used in warehouses. IC Role / Device Role / Timing Role: Main system rail LDO with fault monitoring; RST feeds watchdog timer input to detect undervoltage lockout events. Use Value: 170°C thermal shutdown protects against enclosure overheating in sealed enclosures; 2.5V–5.5V input range accommodates wide-input DC adapters and supercap backups. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B332MR-G | 3.3V fixed, 500mA, 150mV dropout, 25µA IQ, SOT-25 package | No reset output; smaller footprint but lower thermal mass; max 0.8W dissipation | Choose for cost-sensitive, space-constrained designs where reset functionality is handled externally. |
| Analog Devices ADP1713AUJZ-3.3-R7 | 3.3V fixed, 500mA, 170mV dropout, 350µA IQ, TSOT-5 package | Includes enable pin but no reset; higher ground current reduces battery life in always-on use cases | Choose when board layout favors 5-pin SOT and reset is generated by system PMIC or µC. |
Compared with XC6219B332MR-G and ADP1713AUJZ-3.3-R7, MAX1792EUA33 uniquely combines integrated reset, ultra-low 80µA ground current, and 130mV dropout in a thermally enhanced µMAX package - making it optimal for battery-critical portable systems requiring autonomous fault signaling.
Availability
MAX1792EUA33 is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, PDAs, and USB hubs requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for MAX1792EUA33 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, automotive, and communications markets.
The MAX1792 belongs to Maxim's precision low-dropout regulator product line, engineered specifically for battery-powered portable electronics demanding ultra-low quiescent current, tight output accuracy, and integrated power-monitoring features.
FAQ
What is the maximum input voltage rating for MAX1792EUA33?
The MAX1792EUA33 has an absolute maximum input voltage of +6V applied to the IN pin. However, its operational input range is strictly 2.5V to 5.5V per datasheet specifications. Exceeding 5.5V may cause permanent damage or violate safety margins defined in the Absolute Maximum Ratings table. For reliable operation, maintain VIN within 2.5V–5.5V and ensure transient spikes remain below +6V.
Does MAX1792EUA33 require external capacitors, and what values are recommended?
Yes, MAX1792EUA33 requires external capacitors for stability and performance. A 1µF ceramic capacitor must be placed between IN and GND, and a 3.3µF low-ESR (≤0.1Ω) ceramic capacitor between OUT and GND. For output voltages below 2.0V, use a 4.7µF output capacitor. These values are validated across -40°C to +85°C and ensure proper load-transient response, PSRR, and noise suppression as confirmed in the Typical Operating Characteristics section.
How does the RST pin function on MAX1792EUA33, and what external components are needed?
The RST pin on MAX1792EUA33 is an open-drain, active-low output that goes low when VOUT falls below 93% of 3.3V and remains low for ≥4ms after VOUT recovers. To generate a logic-high signal, a pullup resistor (typically 100kΩ) must connect RST to OUT. This configuration provides a clean power-on-reset signal to microcontrollers. When unused, RST should be grounded or left unconnected - never left floating.
Can MAX1792EUA33 be used in adjustable-output configurations?
Yes, MAX1792EUA33 supports adjustable output mode via the SET pin. Though factory-trimmed for 3.3V, connecting SET to a resistive divider between OUT and GND allows output adjustment from 1.25V to 5.0V. The internal Dual Mode™ comparator detects VSET < 50mV to select preset mode; otherwise, it engages external feedback. Full design equations and stability guidelines are provided in the Applications Information section of the MAX1792 datasheet.
What thermal design considerations apply to MAX1792EUA33 in high-current applications?
MAX1792EUA33 dissipates up to 1.3W in the Power-µMAX package, requiring proper thermal management. Both Pin 5 (GND) and the exposed pad (EP) must be soldered to a large PCB ground plane using multiple thermal vias. Failure to do so limits safe continuous output current - e.g., at 500mA and 1V dropout, junction temperature rises rapidly without adequate heatsinking. Thermal derating curves in Figure 3 confirm maximum current vs. input-output differential voltage at various ambient temperatures.
MAX1792EUA33 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
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX-EP|8-uSOP-EP
MAX1792EUA33 FAQ
1.How can I place an order for MAX1792EUA33 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1792EUA33 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 reliable?
The price and inventory of MAX1792EUA33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1792EUA33 is usually 5 days.
3.What payment methods are accepted for MAX1792EUA33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1792EUA33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1792EUA33?
MAX1792EUA33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1792EUA33 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?
For technical support, including MAX1792EUA33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1792EUA33 requirements.
6.How does Aetrix verify that MAX1792EUA33 is sourced from the original manufacturer or authorized distributors?
All MAX1792EUA33 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 meets industry standards.
7.What is the process for return or replacement of MAX1792EUA33?
All MAX1792EUA33 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1792EUA33, 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 part is unused and in its original packaging.
Return procedure for MAX1792EUA33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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