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Analog Devices Inc./Maxim Integrated MAX1793EUE18+T
- Part No.:
- MAX1793EUE18+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX1793EUE18+T.pdf
- Description:
- IC REG LIN POS ADJ 1A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,426
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Product details
Overview
MAX1793EUE18+T from Maxim Integrated is a low-dropout linear regulator (LDO) with fixed 1.8V output, delivering guaranteed 1A load current at 210mV dropout, ±1% output voltage accuracy over temperature and load, and ultra-low 125µA ground current. It integrates a reset output with 4ms delay, thermal-overload protection, and short-circuit current limiting - designed for power management in space-constrained portable electronics.
For engineers reviewing the MAX1793EUE18+T datasheet, MAX1793EUE18+T pinout, MAX1793EUE18+T application, or MAX1793EUE18+T equivalent, key selection criteria include its 1.8V preset output, TSSOP-EP package thermal performance, dual-mode SET pin flexibility, and low-noise (115µVRMS) operation under battery-powered transient loads.
Technical Context
The MAX1793EUE18+T uses an internal p-channel MOSFET pass transistor enabling low dropout and minimal quiescent current - no base drive required, unlike PNP-based LDOs. Its Dual Mode™ architecture selects between factory-trimmed 1.8V output (SET = GND) or adjustable mode (1.25V–5.0V) via external resistor divider.
It features a dedicated open-drain RST output asserting low when VOUT falls below 94% of nominal (1.692V), holding for ≥4ms after recovery. Thermal shutdown activates at +170°C with ~20°C hysteresis, and current limiting operates at 1.1–3.3A depending on output regulation state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% over -40°C to +85°C, 1mA–1A load, VIN ≥ 2.5V |
| Dropout Voltage | 210mV typical at 1A load - enables operation down to VIN = 2.01V while maintaining regulation |
| Ground Current | 125µA typical at 100µA load - minimizes battery drain in standby |
| Shutdown Current | 0.1µA max - supports deep-sleep modes in portable systems |
| Output Noise | 115µVRMS (10Hz–1MHz) - suitable for noise-sensitive analog/RF circuitry |
| Reset Threshold | 94% of nominal VOUT (1.692V) with 4ms release delay - provides clean POR signaling |
| Thermal Shutdown | Activates at +170°C junction temperature with 20°C hysteresis - prevents permanent damage during overload |
Pinout & Package
The MAX1793EUE18+T is housed in a 16-pin thermally enhanced TSSOP-EP package (1.5W power dissipation, 1.1mm height, 30% smaller than SOT223), with exposed pad (EP) soldered to PCB ground plane for optimal thermal conduction.
| 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 pins (2.5V–5.5V); internally tied but require external parallel connection and 4.7µF bypass |
| 6 | RST | Open-drain reset output; low when VOUT < 94% of 1.8V; requires external 100kΩ pull-up to OUT or logic rail |
| 7 | SHDN | Active-low shutdown control; pulls OUT low via 5kΩ internal resistor and disables all circuitry in shutdown |
| 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 1.8V fixed mode; connected to resistor divider for adjustable mode |
| 12–15 | OUT | Regulated 1.8V output terminals; internally tied and must be externally joined with 6.8µF low-ESR capacitor |
| EP | Exposed Pad | Thermal and electrical ground; mandatory connection to PCB ground plane for thermal reliability and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Output Selection | Factory-trimmed 1.8V output or 1.25V–5.0V adjustable range via single SET pin - eliminates need for separate fixed/adjustable SKUs |
| p-Channel MOSFET Pass Device | Enables 210mV dropout at 1A and 125µA ground current - avoids base-drive losses inherent in PNP regulators |
| Integrated Reset Output | Guaranteed 4ms delay and 94% trip threshold - delivers reliable power-on-reset without external supervisor IC |
| Thermal & Short-Circuit Protection | Self-limiting operation up to +170°C junction temp and indefinite output short-circuit tolerance - ensures robustness in field use |
| TSSOP-EP Thermal Package | 1.5W continuous dissipation at +70°C ambient with 19mW/°C derating - supports high-current operation in compact layouts |
Applications
| Cellular Phone Baseband Power | Notebook CPU Core Supply |
|---|---|
Use Scenario: Providing stable 1.8V core voltage to baseband processors during RF transmission bursts and sleep cycles. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 1.8V with fast transient response and low noise to prevent digital corruption. Use Value: 115µVRMS noise and 210mV dropout enable full battery utilization down to 2.01V input, extending talk time. |
Use Scenario: Supplying 1.8V I/O rail for notebook chipset interfaces requiring tight voltage tolerance and low standby current. IC Role / Device Role / Timing Role: Secondary LDO supporting always-on logic domains with shutdown-controlled power gating. Use Value: 0.1µA shutdown current and ±1% accuracy ensure compliance with ACPI S3/S5 power states and voltage margining requirements. |
| Handheld Instrument ADC Reference | PDA Application Processor Core |
Use Scenario: Generating clean 1.8V reference supply for 12-bit SAR ADCs in portable test equipment. IC Role / Device Role / Timing Role: Low-noise analog LDO decoupling sensitive analog front-end from noisy digital supplies. Use Value: 115µVRMS output noise and 40dB PSRR at 1kHz minimize code spread and improve ENOB. |
Use Scenario: Powering ARM-based application processors in PDAs during dynamic DVFS scaling between 100MHz and 600MHz. IC Role / Device Role / Timing Role: High-current LDO responding to rapid load steps with <20mV undershoot/overshoot. Use Value: Guaranteed 1A output and 125µA ground current support both peak performance and extended idle battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79618DRBR | 1.8V fixed, 1A, 150mV dropout, 175µA IQ, 5-pin WSON package | No RST output, no SET pin adjustability, lower thermal dissipation (0.7W) | Preferred where board space is critical and reset supervision is handled externally |
| MCP1826T-1802E/DB | 1.8V fixed, 1A, 300mV dropout, 120µA IQ, 8-pin SOIC package | No reset output, no thermal shutdown, larger footprint, higher dropout limits minimum VIN to 2.1V | Suitable for cost-sensitive industrial designs where thermal margin exceeds 1.5W requirement |
Compared with MAX1793EUE18+T, the TPS79618DRBR offers lower dropout but lacks integrated reset and thermal protection, while the MCP1826T-1802E/DB provides similar IQ but sacrifices safety features and thermal capability - making MAX1793EUE18+T optimal for portable systems demanding reliability, compactness, and feature integration.
Availability
MAX1793EUE18+T is available at Aetrix Electronics and suitable for cellular phones, handheld instruments, and PDAs requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for MAX1793EUE18+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) 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-IQ, high-current LDO family engineered for battery-powered portable electronics - prioritizing ultra-low ground current, small thermally enhanced packages, and integrated system-level functions like reset and thermal protection.
FAQ
What is the maximum input voltage for the MAX1793EUE18+T?
The MAX1793EUE18+T supports an absolute maximum input voltage of +6V relative to GND. Its operational input range is +2.5V to +5.5V; operation below 2.5V triggers undervoltage lockout. For reliable 1.8V output regulation, VIN must exceed 2.01V (1.8V + 210mV dropout). Exceeding +6V risks permanent damage per Absolute Maximum Ratings.
Does the MAX1793EUE18+T require external capacitors, and what values are recommended?
Yes, the MAX1793EUE18+T requires external capacitors: 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 for stability - 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 MAX1793EUE18+T?
The RST output on the MAX1793EUE18+T is an open-drain signal that goes low when VOUT drops below 94% of 1.8V (i.e., 1.692V) and remains low for at least 4ms after VOUT recovers. It requires an external 100kΩ pull-up resistor to OUT or another logic rail. RST is also forced low during shutdown, enabling unified power-fail and shutdown detection.
Can the MAX1793EUE18+T be used in adjustable-output mode despite its 1.8V preset designation?
Yes, the MAX1793EUE18+T supports adjustable-output mode via the SET pin. When SET is disconnected from GND and connected to an external resistor divider, the output can be set from 1.25V to 5.0V using VOUT = 1.25V × (1 + R1/R2). The device retains all specifications including 1A current capability and 115µVRMS noise in this configuration.
What thermal design considerations apply to the MAX1793EUE18+T in its TSSOP-EP package?
The MAX1793EUE18+T's TSSOP-EP package requires soldering the exposed pad (EP) and GND pin to a large PCB ground plane (minimum 1in² recommended) using multiple thermal vias. This achieves the specified 1.5W power dissipation at +70°C ambient. Without proper thermal coupling, junction temperature may exceed +150°C, triggering thermal shutdown or reducing reliability.
MAX1793EUE18+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 (1.8V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- -
- 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
MAX1793EUE18+T FAQ
1.How can I place an order for MAX1793EUE18+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1793EUE18+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 MAX1793EUE18+T reliable?
The price and inventory of MAX1793EUE18+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1793EUE18+T is usually 5 days.
3.What payment methods are accepted for MAX1793EUE18+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1793EUE18+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1793EUE18+T?
MAX1793EUE18+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1793EUE18+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 MAX1793EUE18+T?
For technical support, including MAX1793EUE18+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1793EUE18+T requirements.
6.How does Aetrix verify that MAX1793EUE18+T is sourced from the original manufacturer or authorized distributors?
All MAX1793EUE18+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 MAX1793EUE18+T meets industry standards.
7.What is the process for return or replacement of MAX1793EUE18+T?
All MAX1793EUE18+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1793EUE18+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 MAX1793EUE18+T part is unused and in its original packaging.
Return procedure for MAX1793EUE18+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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