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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 LIN POS ADJ 1A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,304
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Product details
Overview
MAX1793EUE50+ from Maxim Integrated is a low-dropout linear regulator (LDO) with pMOS pass transistor, delivering 1A output current at 5.0V preset output voltage with ±1% accuracy over -40°C to +85°C. It operates from 2.5V to 5.5V input, features 210mV dropout at full load, 125µA ground current, and integrated reset output with 4ms delay-designed for power rail regulation in portable 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 criteria include guaranteed 1A output under 210mV dropout, low-noise 115µVRMS operation, thermal-overload and short-circuit protection, and Dual Mode™ configurability between fixed and adjustable output.
Technical Context
The MAX1793EUE50+ uses an internal +1.25V reference and error amplifier to regulate output via a p-channel MOSFET pass device, eliminating base-drive current and enabling ultra-low quiescent current (125µA at light load, ≤225µA in dropout). Its Dual Mode™ architecture selects between factory-trimmed 5.0V output (SET = GND) or adjustable range (1.25V–5.0V) based on SET pin voltage threshold (50–150mV).
It integrates a 4ms-delay open-drain RST output triggered when VOUT falls below 94% of nominal, thermal shutdown at +170°C with ~20°C hysteresis, and foldback current limiting (1.1–3.3A short-circuit, 2.8A in-regulation). The TSSOP-EP package leverages exposed pad and GND pin for thermal conduction, supporting 1.5W continuous dissipation at +70°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V (±1% accuracy over -40°C to +85°C, 1mA–1A load) |
| Dropout Voltage | 210mV typical at 1A load - enables operation down to VIN = 5.21V while maintaining regulation |
| Ground Current | 125µA at 100µA load - minimizes battery drain in standby |
| Shutdown Current | 0.1µA max - ensures negligible leakage during system sleep |
| Output Noise | 115µVRMS (10Hz–1MHz) - suitable for noise-sensitive analog/RF circuitry without added filtering |
| Reset Threshold | 94% of nominal VOUT (4.7V), with 4ms release delay - provides clean power-on-reset timing for microcontrollers |
| Thermal Shutdown | Triggers at +170°C junction temperature with ~20°C hysteresis - prevents permanent damage during sustained overload |
Pinout & Package
MAX1793EUE50+ is housed in a 16-pin thermally enhanced TSSOP package (U16E-3) with exposed pad (EP), measuring 5mm × 4.4mm × 1.1mm. The EP and GND pin serve as primary thermal paths; both must be soldered to PCB ground plane for rated 1.5W power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 9, 16 | N.C. | No internal connection - must remain unconnected per datasheet |
| 2–5 | IN | Main input supply (2.5V–5.5V); all four pins internally tied and require external parallel connection with 4.7µF bypass capacitor |
| 6 | RST | Open-drain reset output; sinks current when VOUT < 4.7V, requires external 100kΩ pull-up to OUT or logic rail |
| 7 | SHDN | Active-low enable; logic low disables regulator, pulls OUT low via 5kΩ internal resistor, reduces IQ to 0.1µA |
| 10 | GND | Power and signal ground; also functions as heatsink - must connect to large copper area or ground plane |
| 11 | SET | Voltage-setting input; grounded for 5.0V fixed mode; connected to resistor divider for adjustable mode (1.25V–5.0V) |
| 12–15 | OUT | Regulated 5.0V output; all four pins internally tied and must be externally joined with 6.8µF low-ESR capacitor to GND |
| EP | Exposed Pad | Thermal and electrical ground; mandatory connection to PCB ground plane for thermal performance and reliability |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Output Selection | Single SET pin enables seamless switch between factory-trimmed 5.0V output and 1.25V–5.0V adjustable range - eliminates BOM variants |
| pMOS Pass Transistor | Enables 210mV dropout at 1A and sub-225µA quiescent current in dropout - extends battery runtime in portable devices |
| Integrated Reset Output | 4ms-delay open-drain RST asserts low when VOUT drops below 94% of 5.0V - delivers deterministic POR signal without external supervisor IC |
| Robust Protection Suite | Combines thermal shutdown (+170°C), short-circuit current limit (1.1–3.3A), and output pulldown in shutdown - ensures fault tolerance in unattended operation |
| TSSOP-EP Thermal Packaging | 1.1mm height, 30% smaller than SOT223, with exposed pad and GND pin for 1.5W dissipation - enables high-power density in space-constrained layouts |
Applications
| Cellular Phone Power Rail | Notebook Computer Core Logic |
|---|---|
|
Use Scenario: Regulating main 5.0V rail for baseband processor, RF transceiver, and display interface in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary LDO supplying stable 5.0V at up to 1A with fast transient response to burst-mode transmission loads. Use Value: 210mV dropout allows operation until battery voltage falls to 5.21V, extending usable battery life; 115µVRMS noise avoids interference with sensitive RF front-end. |
Use Scenario: Providing clean 5.0V supply to USB controllers, touchpad ICs, and embedded controller in ultraportable notebooks. IC Role / Device Role / Timing Role: Secondary LDO delivering low-noise, well-regulated 5.0V independent of main DC-DC converter ripple. Use Value: ±1% output accuracy ensures reliable USB enumeration; RST output synchronizes EC reset with power stabilization, eliminating boot failures. |
| Handheld Instrument ADC Reference | PDA System Management |
|
Use Scenario: Powering precision 16-bit ADC and op-amp signal chain in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Low-noise 5.0V reference rail decoupled from noisy digital supplies using local LDO regulation. Use Value: 115µVRMS output noise directly limits ADC SNR - enables >90dB effective resolution without additional filtering stages. |
Use Scenario: Managing power sequencing and health monitoring for CPU, memory, and peripherals in Palm OS-based PDAs. IC Role / Device Role / Timing Role: System-level LDO with integrated RST and SHDN control, coordinating with PMIC for orderly power-up/down. Use Value: Active-low SHDN enables software-controlled power gating; 4ms RST delay ensures firmware initialization completes before releasing reset to CPU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4701RGWR | Lower noise (4.7µVRMS), higher PSRR (>70dB @ 1kHz), but 300mV dropout at 1A and no integrated RST output | Better suited for ultra-low-noise analog rails where reset supervision is handled separately | Select when noise performance outweighs need for integrated reset and compact footprint |
| MCP1826T-5002E/DB | 5.0V fixed, 350mV dropout at 1A, 180µA ground current, no RST, SOT-223 package (larger, lower thermal performance) | Cost-optimized solution for non-battery-critical industrial applications with relaxed dropout and thermal requirements | Select when board space and thermal constraints are less stringent and reset functionality is implemented externally |
Compared with TPS7A4701RGWR and MCP1826T-5002E/DB, MAX1793EUE50+ uniquely combines 210mV dropout, integrated 4ms RST, and TSSOP-EP thermal efficiency - making it optimal for space- and battery-limited portable designs requiring self-contained power supervision.
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-quiescent-current LDO family, engineered specifically for battery-powered portable equipment where extended runtime, small footprint, and integrated supervision features are critical design requirements.
FAQ
What is the maximum continuous output current of the MAX1793EUE50+?
The MAX1793EUE50+ guarantees 1A continuous output current across its operating temperature range (-40°C to +85°C) when input voltage is ≥3V. Short-circuit current is limited to 1.1–3.3A, and in-regulation current limit reaches 2.8A for transient load handling - ensuring robustness against momentary overloads without shutdown.
Does the MAX1793EUE50+ require external components for stable operation?
Yes, the MAX1793EUE50+ requires a 4.7µF input capacitor (CIN) between IN and GND, and a 6.8µF low-ESR output capacitor (COUT) between OUT and GND. COUT ESR must be ≤0.5Ω to ensure stability and optimal transient response. Ceramic, tantalum, or OS-CON capacitors meeting this specification are recommended.
How does the RST output function on the MAX1793EUE50+?
The RST output on the MAX1793EUE50+ is an open-drain signal that goes low when VOUT falls below 94% of its nominal 5.0V value (i.e., <4.7V). It remains asserted for at least 4ms after VOUT recovers to regulation, providing a clean power-on-reset pulse. An external 100kΩ pull-up resistor to OUT or another logic rail is required to generate a valid logic-high level.
Can the MAX1793EUE50+ be used in adjustable-output mode?
Yes, the MAX1793EUE50+ supports adjustable output from 1.25V to 5.0V by connecting the SET pin to an external resistor divider instead of grounding it. The output voltage follows VOUT = 1.25V × (1 + R1/R2). For 5.0V operation, the device is configured in preset mode with SET = GND - no external resistors needed.
What thermal considerations apply to the MAX1793EUE50+ in the TSSOP-EP package?
The MAX1793EUE50+ TSSOP-EP package relies on both the exposed pad (EP) and GND pin for heat dissipation. To achieve rated 1.5W power dissipation at +70°C ambient, EP and GND must be soldered to a large PCB ground plane (minimum 1in² recommended) using multiple thermal vias. Failure to do so risks thermal shutdown at significantly lower loads.
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:
- 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 (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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