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Analog Devices Inc./Maxim Integrated MAX1793EUE33/V+
- Part No.:
- MAX1793EUE33/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX1793EUE33/V+.pdf
- Description:
- IC REG LIN POS ADJ 1A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:257
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Product details
Overview
MAX1793EUE33/V+ from Maxim Integrated is a low-dropout linear regulator (LDO) with pMOS pass transistor, delivering 1A output current at ±1% accuracy with 210mV dropout at full load and 125µA ground current - designed for power-sensitive portable systems requiring stable 3.3V rail generation from 2.5V–5.5V inputs.
For engineers reviewing the MAX1793EUE33/V+ datasheet, MAX1793EUE33/V+ pinout, MAX1793EUE33/V+ application, or MAX1793EUE33/V+ equivalent, key selection criteria include guaranteed 1A output under dropout, integrated 4ms reset output, Dual Mode™ voltage selection (preset 3.3V or adjustable), thermal-overload protection, and TSSOP-EP package compatibility with high-density PCB layouts.
Technical Context
The MAX1793EUE33/V+ implements a +1.25V internal reference and error amplifier driving a p-channel MOSFET pass device - eliminating base-drive current and enabling ultra-low quiescent operation (125µA at light load, ≤225µA in dropout). Its Dual Mode™ comparator selects between internal fixed feedback (SET = GND) and external resistor-divider (SET = 1.25V × [1 + R1/R2]) based on VSET < 50mV threshold.
It integrates a low-VOUT detector that asserts open-drain RST when output falls 6% below nominal (i.e., <3.09V for 3.3V mode), holding low for ≥4ms after recovery; shutdown disables regulation and reduces supply current to 0.1µA while pulling OUT low via 5kΩ internal resistance and forcing RST low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Preset 3.3V ±1% (at IOUT = 1mA–1A, TA = 0°C to +85°C); adjustable 1.25V–5.0V via external divider |
| Dropout Voltage | 210mV typical at 1A (VIN ≥ 3.8V); enables operation down to 3.51V input for regulated 3.3V output |
| Ground Current | 125µA typical at 100µA load; ensures >1000-hour battery life in always-on 3.3V sensor nodes |
| Reset Output Delay | 4ms minimum assertion time after VOUT recovers; provides reliable power-on-reset timing for microcontrollers |
| Output Noise | 115µVRMS (10Hz–1MHz); suitable for noise-sensitive analog circuitry without additional filtering |
| Thermal Shutdown | Activates at TJ = +170°C with ~20°C hysteresis; prevents permanent damage during sustained overload or poor heatsinking |
| Short-Circuit Protection | Limits output to 1.1–3.3A depending on condition; allows indefinite short-circuit survival without latch-off |
Pinout & Package
MAX1793EUE33/V+ uses a 16-pin thermally enhanced TSSOP-EP package (1.5W power rating, 1.1mm height, 30% smaller than SOT223) with exposed pad (EP) soldered to PCB ground plane for optimal thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 9, 16 | N.C. | No internal connection; must remain unconnected per design |
| 2–5 | IN | Input supply (2.5V–5.5V); all four pins internally tied and require external parallel connection to bulk capacitor |
| 6 | RST | Open-drain reset output; sinks current when VOUT < 3.09V; requires external 100kΩ pull-up to OUT or logic rail |
| 7 | SHDN | Active-low shutdown control; pulls OUT low via 5kΩ and forces RST low when asserted |
| 10 | GND | Power and signal ground; also functions as thermal path; must be connected to large copper area |
| 11 | SET | Voltage-setting input; <50mV selects preset 3.3V mode; 1.25V reference point for adjustable configuration |
| 12–15 | OUT | Regulated 3.3V output; all four pins internally tied and must be externally joined at low-inductance point near COUT |
| EP | Exposed Pad | Thermal and electrical ground; mandatory connection to PCB ground plane via multiple vias for thermal reliability |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ voltage selection | Enables seamless transition between factory-trimmed 3.3V output and user-adjustable 1.25V–5.0V range using same footprint |
| 1A guaranteed output with pMOS pass device | Eliminates base-drive losses; maintains regulation under heavy load without quiescent current penalty |
| Integrated 4ms reset timer | Provides deterministic POR signal timing independent of external RC networks or microcontroller firmware delays |
| Thermal-overload and short-circuit protection | Allows safe operation in fault conditions without external current-sense or thermal shutdown circuitry |
| TSSOP-EP package with exposed thermal pad | Reduces θJA by up to 35% vs standard TSSOP; supports 1.5W continuous dissipation with proper PCB layout |
Applications
| Notebook Computers | Cordless Telephones |
|---|---|
Use Scenario: Powering core logic and I/O rails in compact clamshell notebooks where space and thermal headroom are constrained. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying USB controller, touchpad interface, and embedded controller. Use Value: 210mV dropout extends usable battery life by enabling operation until cell voltage drops to 3.51V, while 115µVRMS noise avoids digital jitter in high-speed data links. |
Use Scenario: Regulating 3.3V supply for RF transceiver ICs and DSP subsystems in DECT cordless handsets. IC Role / Device Role / Timing Role: Low-noise post-regulator for sensitive RF front-end and audio codec sections. Use Value: 125µA ground current minimizes standby drain on NiMH battery packs; RST output synchronizes DSP boot sequence with power stabilization. |
| Cellular Phones | Handheld Instruments |
Use Scenario: Providing clean 3.3V bias to camera module, display driver, and baseband processor peripherals in multi-rail smartphone PMIC architectures. IC Role / Device Role / Timing Role: Standalone auxiliary LDO for noise-critical analog blocks isolated from noisy switching regulators. Use Value: 1.1–3.3A short-circuit limit survives accidental trace shorts during board rework; thermal shutdown prevents field failures under sealed enclosure conditions. |
Use Scenario: Powering precision ADCs, op-amp signal chains, and microcontroller peripherals in portable multimeters and oscilloscopes. IC Role / Device Role / Timing Role: Reference-grade LDO ensuring stable 3.3V for 16-bit SAR converters and low-drift instrumentation amplifiers. Use Value: ±1% output accuracy over temperature and load eliminates need for system-level calibration; low PSRR degradation above 10kHz preserves measurement integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4700RGWR | Lower noise (4.7µVRMS), higher PSRR (>70dB @ 1kHz), but 500mA max output and 3.3V not factory-preset | Better suited for ultra-low-noise analog signal chains; requires external resistors for 3.3V setup | Select when noise performance dominates over output current capability and preset convenience |
| MCP1826T-3302E/DB | Same 3.3V preset, 1A output, but higher 350mV dropout and no RST output or Dual Mode™ adjustability | Acceptable for cost-sensitive non-critical digital rails where reset signaling is handled elsewhere | Select when reset functionality and adjustable mode are unnecessary and lower BOM count is prioritized |
Compared with TPS7A4700RGWR and MCP1826T-3302E/DB, MAX1793EUE33/V+ uniquely combines automotive-qualified 3.3V preset operation, integrated reset timing, Dual Mode™ flexibility, and 210mV dropout - making it optimal for space-constrained portable systems requiring both reliability and design adaptability.
Availability
MAX1793EUE33/V+ is available at Aetrix Electronics and suitable for notebook computers, cellular phones, and handheld instruments requiring stable component supply with automotive-grade qualification and long-term production continuity.
Supply support for MAX1793EUE33/V+ 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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX1793 belongs to Maxim's low-IQ LDO family engineered for battery-powered portable equipment - emphasizing ultra-low ground current, tight output accuracy, and integrated protection features without sacrificing output current capability.
FAQ
What is the maximum input voltage supported by the MAX1793EUE33/V+?
The MAX1793EUE33/V+ supports an absolute maximum input voltage of +6V relative to GND, with recommended operating range from +2.5V to +5.5V. Operation above +5.5V risks permanent damage, and input undervoltage lockout activates below +2.0V to prevent unstable regulation. The device is rated for continuous operation across –40°C to +85°C ambient temperature.
Does the MAX1793EUE33/V+ require external capacitors, and what values are recommended?
Yes, the MAX1793EUE33/V+ requires external capacitors for stability and performance: a 4.7µF input capacitor (CIN) between IN and GND, and a 6.8µF output capacitor (COUT) between OUT and GND. COUT must have ESR ≤ 0.5Ω - ceramic, low-ESR tantalum, or OS-CON types are acceptable. Both capacitors must be placed as close as possible to their respective pins to minimize trace inductance.
How does the RST output function on the MAX1793EUE33/V+?
The RST output on the MAX1793EUE33/V+ is an open-drain signal that goes low when VOUT falls below 94% of nominal (≤3.09V for 3.3V mode) and remains low for at least 4ms after VOUT recovers. It is pulled low during shutdown and requires an external 100kΩ pull-up resistor to OUT or another logic rail. This provides a precise, hardware-based power-on-reset signal for microcontrollers or FPGA configuration logic.
Can the MAX1793EUE33/V+ be used in adjustable-output configurations?
Yes, the MAX1793EUE33/V+ supports adjustable-output operation via its SET pin. By connecting an external resistor divider between OUT and GND with the junction to SET, the output can be set from 1.25V to 5.0V using VOUT = 1.25V × (1 + R1/R2). The SET pin bias current is ±100nA, allowing high-value resistors (up to 125kΩ for R2) to minimize power loss while maintaining accuracy.
What thermal management considerations apply to the MAX1793EUE33/V+ in high-power applications?
The MAX1793EUE33/V+ uses a TSSOP-EP package with an exposed thermal pad (EP) that must be soldered to the PCB ground plane using multiple vias and a minimum 1in² copper area. GND pin 10 also serves as a thermal path. Without proper heatsinking, power dissipation is limited to 1.5W at +70°C ambient; derating is 19mW/°C above that. Junction temperature must not exceed +150°C for continuous operation.
MAX1793EUE33/V+ 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 (3.3V)
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
MAX1793EUE33/V+ FAQ
1.How can I place an order for MAX1793EUE33/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1793EUE33/V+ 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 MAX1793EUE33/V+ reliable?
The price and inventory of MAX1793EUE33/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1793EUE33/V+ is usually 5 days.
3.What payment methods are accepted for MAX1793EUE33/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1793EUE33/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1793EUE33/V+?
MAX1793EUE33/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1793EUE33/V+ 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 MAX1793EUE33/V+?
For technical support, including MAX1793EUE33/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1793EUE33/V+ requirements.
6.How does Aetrix verify that MAX1793EUE33/V+ is sourced from the original manufacturer or authorized distributors?
All MAX1793EUE33/V+ 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 MAX1793EUE33/V+ meets industry standards.
7.What is the process for return or replacement of MAX1793EUE33/V+?
All MAX1793EUE33/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1793EUE33/V+, 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 MAX1793EUE33/V+ part is unused and in its original packaging.
Return procedure for MAX1793EUE33/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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