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Analog Devices Inc./Maxim Integrated MAX1793EUE33/V+T
- Part No.:
- MAX1793EUE33/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX1793EUE33/V+T.pdf
- Description:
- IC REG LIN POS ADJ 1A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,675
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Product details
Overview
MAX1793EUE33/V+T from Maxim Integrated is a low-dropout linear regulator (LDO) with fixed 3.3V output, delivering guaranteed 1A load current at 210mV dropout, ±1% output voltage accuracy over temperature and load, and integrated reset output with 4ms delay. It serves as a primary power rail regulator in portable battery-powered systems requiring stable, low-noise 3.3V supply.
For engineers reviewing the MAX1793EUE33/V+T datasheet, MAX1793EUE33/V+T pinout, MAX1793EUE33/V+T application, or MAX1793EUE33/V+T equivalent, key selection criteria include its automotive-qualified TSSOP-EP package, 125µA ground current at light load, 0.1µA shutdown current, 115µVRMS output noise, and dual-mode operation supporting both preset and adjustable configurations.
Technical Context
The MAX1793EUE33/V+T employs an internal p-channel MOSFET pass transistor enabling low quiescent current and minimal dropout-unlike bipolar-based LDOs that suffer high base-drive losses. Its Dual Mode™ architecture uses the SET pin to auto-select between factory-trimmed 3.3V regulation (SET = GND) and adjustable operation (SET = external resistor divider).
It integrates a precision 1.25V reference, error amplifier, MOSFET driver, thermal shutdown (170°C trip), short-circuit current limiting (1.1–3.3A), and open-drain RST output asserting low when VOUT falls below 94% of nominal and holding for ≥4ms after recovery. The exposed pad (EP) and GND pin jointly serve as thermal conduction paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V (±1% accuracy over -40°C to +85°C, 1mA–1A load) |
| Dropout Voltage | 210mV typical at 1A load-enables operation down to VIN = 3.51V while maintaining regulation |
| Ground Current | 125µA at 100µA load-minimizes battery drain in standby mode |
| Shutdown Current | 0.1µA max-supports ultra-low-power system sleep states |
| Output Noise | 115µVRMS (10Hz–1MHz)-suitable for noise-sensitive analog and RF circuitry |
| Reset Threshold | 94% of nominal VOUT (3.102V) with 4ms release delay-provides reliable power-on-reset timing |
| Thermal Protection | 170°C junction trip with ~20°C hysteresis-prevents permanent damage during sustained overload |
Pinout & Package
The MAX1793EUE33/V+T is housed in a 16-pin thermally enhanced TSSOP package (U16E-3) with exposed pad (EP), rated for 1.5W continuous dissipation at +70°C ambient. The EP and GND pin must be soldered to a large PCB ground plane for effective thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 9, 16 | N.C. | No internal connection-must remain unconnected on PCB |
| 2–5 | IN | Main input supply (2.5V–5.5V); all four pins internally tied and require external parallel connection to CIN |
| 6 | RST | Open-drain reset output; sinks current when VOUT < 94% of 3.3V; 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, and forces RST low |
| 10 | GND | Power and signal ground; also functions as thermal path-must connect to PCB ground plane |
| 11 | SET | Voltage-setting input; grounded for 3.3V preset mode; connected to resistor divider for adjustable operation |
| 12–15 | OUT | Regulated 3.3V output; all four pins internally tied and must be externally joined at point-of-load |
| EP | Exposed Pad | Thermal and electrical ground; mandatory connection to PCB ground plane for thermal performance and EMI control |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Output Selection | Auto-switches between factory-trimmed 3.3V (SET = GND) and 1.25V–5.0V adjustable (SET = resistor divider) without external mode control |
| Automotive Qualification | AEC-Q100 qualified (-40°C to +85°C operation) per /V suffix-meets reliability and stress-test requirements for automotive ECUs |
| Low-Noise Regulation | 115µVRMS output noise enables direct powering of ADC references, PLLs, and RF front-ends without additional filtering |
| Integrated Power-On Reset | Guaranteed 4ms RST assertion delay ensures microcontroller reset timing compliance across voltage ramp rates and temperature |
| Robust Fault Protection | Combined thermal shutdown, short-circuit current limit (1.1–3.3A), and undervoltage lockout (2.0–2.3V) prevent damage under fault conditions |
| Lead-Free & RoHS Compliant | +T suffix denotes lead-free, RoHS-compliant packaging-compatible with standard reflow profiles (260°C peak) |
Applications
| Cellular Phone Baseband Power | Notebook Computer I/O Rail |
|---|---|
Use Scenario: Supplies clean 3.3V to baseband processor I/O banks and memory interfaces in 3G/4G handsets. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 3.3V with fast transient response to handle burst-mode data transmission current spikes. Use Value: 210mV dropout extends usable battery life by allowing operation down to 3.51V input; 115µVRMS noise prevents digital jitter in high-speed serial links. |
Use Scenario: Powers USB controller, card reader, and display interface circuits in ultraportable notebooks. IC Role / Device Role / Timing Role: Secondary LDO generating stable 3.3V from main 5V or 12V DC-DC converter output. Use Value: 125µA ground current minimizes quiescent loss during suspend-to-RAM; RST output synchronizes peripheral initialization with CPU wake-up. |
| Cordless Telephone DSP Core | Handheld Instrument Sensor Interface |
Use Scenario: Provides low-noise 3.3V supply to DSP and CODEC in DECT cordless handsets. IC Role / Device Role / Timing Role: Low-ESR, low-noise LDO decoupling sensitive analog signal paths from noisy digital switching domains. Use Value: 115µVRMS noise and >40dB PSRR above 10kHz suppress coupling from high-frequency clock harmonics into audio band. |
Use Scenario: Powers precision analog front-end (AFE), ADC, and MEMS sensor bias in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Precision voltage source ensuring ADC reference stability and sensor excitation accuracy. Use Value: ±1% output accuracy over temperature maintains measurement linearity; thermal protection prevents drift-induced calibration errors during extended field use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS7A4700RGWR | Ultra-low noise (4.7µVRMS), lower IQ (1µA), but only 100mA output and higher dropout (300mV @ 100mA) | Better for ultra-low-noise analog rails; insufficient for 1A digital loads | Select when noise < 5µVRMS is critical and load ≤100mA |
| ON Semiconductor NCP1117ST33T3G | 1A output, 3.3V fixed, but higher dropout (1.2V @ 1A), no reset output, SOT-223 package (30% larger, 1.1mm taller) | Lacks automotive qualification, reset function, and low-noise performance | Select for cost-sensitive industrial applications where space and reset are not constraints |
Compared with the MAX1793EUE33/V+T, the TPS7A4700RGWR trades 1A capability and automotive qualification for nanovolt-level noise, while the NCP1117ST33T3G sacrifices dropout, reset functionality, and thermal profile to meet lower BOM cost targets-neither offers the same combination of 1A/210mV/±1%/RST/automotive in a compact TSSOP-EP.
Availability
MAX1793EUE33/V+T is available at Aetrix Electronics and suitable for automotive infotainment modules, portable medical devices, and industrial handheld terminals requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MAX1793EUE33/V+T 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 high-performance analog, mixed-signal, and power management ICs for demanding applications in automotive, industrial, and communications markets.
The MAX1793 belongs to Maxim's low-dropout linear regulator product line, engineered specifically for battery-powered portable equipment requiring high output current, ultra-low quiescent current, and integrated system-level functions like reset monitoring.
FAQ
What is the maximum input voltage rating for the MAX1793EUE33/V+T?
The MAX1793EUE33/V+T has an absolute maximum input voltage of +6V referenced to GND. Its operational input range is +2.5V to +5.5V; operation outside this range may cause permanent damage or undefined behavior. For reliable 3.3V regulation, VIN must exceed 3.51V (3.3V + 210mV dropout) under full 1A load.
Does the MAX1793EUE33/V+T support adjustable output voltage?
Yes, the MAX1793EUE33/V+T supports adjustable output from 1.25V to 5.0V using an external resistor divider connected to the SET pin. When SET is grounded, it operates in fixed 3.3V mode. The device automatically detects the configuration based on SET pin voltage-below 50mV for preset mode, above 150mV for adjustable mode.
How does the RST output behave during shutdown of the MAX1793EUE33/V+T?
During shutdown (SHDN = GND), the RST output of the MAX1793EUE33/V+T is actively driven low regardless of VOUT level. This behavior ensures a deterministic reset state for downstream logic. RST remains low until SHDN returns high and VOUT stabilizes above 94% of 3.3V, then holds low for ≥4ms before releasing.
What thermal design considerations apply to the MAX1793EUE33/V+T in its TSSOP-EP package?
The MAX1793EUE33/V+T requires soldering both the exposed pad (EP) and GND pin to a large PCB ground plane (minimum 1 in² recommended) using multiple thermal vias. Failure to do so limits continuous power dissipation to <1W at +70°C ambient. With proper layout, it sustains 1.5W at +70°C and supports thermal shutdown at 170°C junction temperature.
Is the MAX1793EUE33/V+T compatible with lead-free reflow processes?
Yes, the MAX1793EUE33/V+T carries the "+T" suffix indicating lead-free, RoHS-compliant packaging. It is qualified for standard Pb-free reflow profiles with a peak temperature of +260°C (per JEDEC J-STD-020), matching industry-standard assembly requirements for modern electronics manufacturing.
MAX1793EUE33/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX1793EUE33/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1793EUE33/V+T 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+T reliable?
The price and inventory of MAX1793EUE33/V+T 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+T is usually 5 days.
3.What payment methods are accepted for MAX1793EUE33/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1793EUE33/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1793EUE33/V+T?
MAX1793EUE33/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1793EUE33/V+T 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+T?
For technical support, including MAX1793EUE33/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1793EUE33/V+T requirements.
6.How does Aetrix verify that MAX1793EUE33/V+T is sourced from the original manufacturer or authorized distributors?
All MAX1793EUE33/V+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX1793EUE33/V+T?
All MAX1793EUE33/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1793EUE33/V+T, 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+T part is unused and in its original packaging.
Return procedure for MAX1793EUE33/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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