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Analog Devices Inc./Maxim Integrated MAX1793EUE50
- Part No.:
- MAX1793EUE50
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX1793EUE50.pdf
- Description:
- IC REG LINEAR LDO 1A LOW IQ
- Quantity:
- Payment:
- Shipping:
Inventory:1,093
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Product details
Overview
MAX1793EUE50 from Maxim Integrated is a low-dropout linear regulator (LDO) with pMOS pass transistor, delivering guaranteed 1A output current at 5.0V preset output voltage, 210mV dropout at full load, ±1% output voltage accuracy, and 125µA ground current - designed for space-constrained battery-powered systems such as cellular phones and handheld instruments.
For engineers reviewing the MAX1793EUE50 datasheet, MAX1793EUE50 pinout, MAX1793EUE50 application, or MAX1793EUE50 equivalent, key selection considerations include its 16-pin TSSOP-EP package with exposed thermal pad, dual-mode (fixed/adjustable) output configuration, integrated 4ms reset output, and thermal-overload protection for robust portable power management.
Technical Context
The MAX1793EUE50 implements Dual Mode™ operation: SET pin voltage <50mV selects internal resistor-divider for fixed 5.0V output; higher SET voltage enables external resistor-divider for adjustable 1.25V–5.0V regulation. Its p-channel MOSFET pass device eliminates base-drive current, enabling ultra-low quiescent current (125µA at light load, ~225µA in dropout) without sacrificing transient response.
Internal circuitry includes a +1.25V reference, error amplifier, MOSFET driver, 94% VOUT low-voltage detector with 4ms release delay, thermal shutdown at +170°C (20°C hysteresis), and short-circuit current limit (1.1–3.3A depending on output condition). RST is open-drain with 0.1V VOL at 1mA sink and operates validly from 1.0V to 5.5V input range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V (preset mode); ±1% accuracy over -40°C to +85°C ensures stable logic supply for microcontrollers and RF ICs. |
| Dropout Voltage | 210mV at 1A load (typical); enables operation down to VIN = 5.21V, extending usable battery life in single-cell Li-ion or 3-cell NiMH systems. |
| Ground Current | 125µA at 100µA load; supports >100-hour standby in always-on portable devices without compromising regulation integrity. |
| Shutdown Current | 0.1µA max; reduces system leakage during deep sleep modes, critical for energy-harvesting and IoT edge sensors. |
| Output Noise | 115µVRMS (10Hz–1MHz); sufficiently low for powering analog front-ends, ADC references, and RF synthesizers without additional filtering. |
| Reset Output | Open-drain RST with 4ms delay after VOUT recovery; provides reliable power-on-reset signaling for embedded processors without external timing components. |
| Thermal Protection | Shuts down at +170°C junction temperature with 20°C hysteresis; prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
The MAX1793EUE50 is housed in a 16-pin thermally enhanced TSSOP package (U16E-3 outline) with exposed pad (EP) soldered to PCB ground plane for optimal thermal dissipation (θJC ≈ 35°C/W). Package height is only 1.1mm, occupying 30% less board area than SOT223.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 9, 16 | N.C. | No internal connection; must remain unconnected per design - floating or tied to GND has no functional impact. |
| 2–5 | IN | Input supply (2.5V–5.5V); four parallel pins reduce trace resistance and improve current handling - requires 4.7µF ceramic capacitor to GND. |
| 6 | RST | Open-drain reset output; asserts low when VOUT drops below 94% of nominal (4.7V for 5.0V output) and holds for ≥4ms after recovery. |
| 7 | SHDN | Active-low shutdown control; pulls OUT low via 5kΩ internal resistor and reduces IQ to 0.1µA when grounded. |
| 10 | GND | Power and signal ground; also functions as thermal path - must be connected to large copper area or ground plane. |
| 11 | SET | Voltage-setting input; <50mV selects 5.0V preset mode; >1.25V enables adjustable output using external R1/R2 divider. |
| 12–15 | OUT | Regulated output (5.0V); four parallel pins minimize IR drop and ESR effects - bypassed with 6.8µF low-ESR capacitor to GND. |
| EP | Exposed Pad | Thermal and electrical ground; mandatory connection to PCB ground plane via multiple vias for safe 1A continuous operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Output Selection | Single SET pin configures fixed 5.0V or adjustable 1.25V–5.0V output - eliminates BOM variants and simplifies design reuse across voltage requirements. |
| pMOS Pass Transistor | Enables 210mV dropout at 1A and 125µA ground current - avoids base-drive losses inherent in PNP-based LDOs, preserving battery runtime. |
| Integrated Reset Generator | 4ms-delayed open-drain RST output referenced to 94% of VOUT - replaces discrete supervisor ICs in microcontroller power sequencing. |
| Thermal & Short-Circuit Protection | Auto-recovering shutdown at +170°C junction temp and 1.1–3.3A current limiting - allows indefinite short-circuit survival without external fusing. |
| TSSOP-EP Thermal Package | 1.1mm profile with exposed pad delivers 1.5W continuous power dissipation at +70°C ambient - enables high-current regulation in ultra-thin portable enclosures. |
Applications
| Cellular Phone Power Rail | Notebook Computer Core Logic |
|---|---|
|
Use Scenario: Regulating main 5.0V rail for baseband processor, display interface, and USB PHY in slim-profile smartphones. IC Role / Device Role / Timing Role: Primary 1A LDO providing clean, tightly regulated 5.0V supply with fast transient response to burst-mode RF transmission loads. Use Value: 210mV dropout extends usable battery voltage down to 5.21V, adding ~8% more operational time versus higher-dropout alternatives. |
Use Scenario: Supplying 5.0V to embedded controller, keyboard controller, and SMBus interface in ultrabook motherboard designs. IC Role / Device Role / Timing Role: Secondary LDO generating isolated 5.0V domain synchronized with system power-up sequence via integrated RST signal. Use Value: 4ms RST delay ensures stable 5.0V before releasing processor reset, eliminating need for external RC timing network. |
| Handheld Instrument Analog Front-End | PDA System-on-Module Power |
|
Use Scenario: Powering precision ADC, op-amp buffers, and sensor excitation circuits in battery-operated multimeters and data loggers. IC Role / Device Role / Timing Role: Low-noise 5.0V LDO supplying analog subsystem with 115µVRMS output noise and minimal PSRR degradation above 10kHz. Use Value: 125µA ground current enables >200-hour battery life in measurement standby mode without compromising analog accuracy. |
Use Scenario: Delivering 5.0V to ARM9-based application processor, NAND flash, and LCD controller in compact PDA modules. IC Role / Device Role / Timing Role: High-current LDO with thermal foldback protecting against overheating during extended video playback or GPS acquisition. Use Value: Exposed-pad TSSOP package dissipates 1.5W at +70°C ambient - sustains 1A load without derating in sealed plastic enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4700RGWR | Ultra-low noise (4.7µVRMS), lower IQ (1.1mA), but only 1A max and 300mV dropout at 1A - requires higher VIN margin. | Better suited for ultra-sensitive analog rails (e.g., audio codecs), not optimal for battery-endurance-critical 5V digital rails. | Select when noise performance outweighs dropout and quiescent current requirements. |
| MCP1826-5002E/DB | 5.0V fixed, 1A, 350mV dropout, 120µA IQ, SOT-223 package - larger footprint, no reset output or thermal shutdown. | Lacks RST and thermal protection; suitable only for non-safety-critical, space-tolerant industrial controls. | Choose only if TSSOP-EP thermal performance and integrated supervision are unnecessary. |
Compared with TPS7A4700RGWR and MCP1826-5002E/DB, the MAX1793EUE50 uniquely combines 210mV dropout, 0.1µA shutdown, 4ms RST, and 1.1mm TSSOP-EP in a single 5.0V LDO - making it the only option meeting simultaneous battery-life, safety, and form-factor constraints in premium portable designs.
Availability
MAX1793EUE50 is available at Aetrix Electronics and suitable for notebook computers, cellular phones, and handheld instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1793EUE50 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 MAX1793 belongs to Maxim's low-dropout linear regulator product line, engineered specifically for battery-powered portable electronics demanding ultra-low IQ, tight output accuracy, and integrated system supervision features.
FAQ
What is the maximum input voltage rating for the MAX1793EUE50?
The MAX1793EUE50 has an absolute maximum input voltage of +6V applied to IN pins relative to GND. Its recommended operating input range is +2.5V to +5.5V. Operation above +5.5V risks permanent damage, while input undervoltage lockout activates below +2.3V, disabling regulation until VIN rises above +2.0V.
Can the MAX1793EUE50 be used in adjustable-output mode despite its 5.0V preset designation?
Yes, the MAX1793EUE50 supports adjustable-output operation via the SET pin. When SET is biased above 50mV (e.g., using a resistor divider), the device regulates to VOUT = 1.25V × (1 + R1/R2), covering 1.25V to 5.0V. The "-50" suffix indicates factory-trimmed 5.0V default, not functional limitation.
How does the RST output behave during shutdown of the MAX1793EUE50?
During shutdown (SHDN = GND), the RST output of the MAX1793EUE50 is actively driven low regardless of VOUT level. This behavior provides a deterministic power-fail indicator and ensures microcontroller reset remains asserted throughout the shutdown state - consistent with its role as a system-level supervisor signal.
What thermal design practices are required for reliable 1A operation of the MAX1793EUE50?
For continuous 1A operation, the MAX1793EUE50 requires the exposed pad (EP) and GND pin to be soldered to a minimum 1in² copper area or multi-via ground plane. Without this, junction temperature exceeds +150°C under worst-case VIN=5.5V/VOUT=5.0V conditions. Thermal derating begins above +70°C ambient (19mW/°C).
Is the MAX1793EUE50 compatible with lead-free PCB assembly processes?
Yes, the MAX1793EUE50 is available in RoHS-compliant, lead(Pb)-free packaging. It supports standard lead-free reflow profiles with peak temperature up to +260°C (per JEDEC J-STD-020), matching industry requirements for modern electronics manufacturing without requiring special process adjustments.
MAX1793EUE50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm 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 (5V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.35V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 200 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:
- 16-TSSOP-EP
MAX1793EUE50 FAQ
1.How can I place an order for MAX1793EUE50 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1793EUE50 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 MAX1793EUE50 reliable?
The price and inventory of MAX1793EUE50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1793EUE50 is usually 5 days.
3.What payment methods are accepted for MAX1793EUE50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1793EUE50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1793EUE50?
MAX1793EUE50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1793EUE50 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 MAX1793EUE50?
For technical support, including MAX1793EUE50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1793EUE50 requirements.
6.How does Aetrix verify that MAX1793EUE50 is sourced from the original manufacturer or authorized distributors?
All MAX1793EUE50 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 MAX1793EUE50 meets industry standards.
7.What is the process for return or replacement of MAX1793EUE50?
All MAX1793EUE50 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1793EUE50, 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 MAX1793EUE50 part is unused and in its original packaging.
Return procedure for MAX1793EUE50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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