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Analog Devices Inc./Maxim Integrated MAX1793EUE15+T
- Part No.:
- MAX1793EUE15+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX1793EUE15+T.pdf
- Description:
- IC REG LIN POS ADJ 1A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,594
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Product details
Overview
The MAX1793EUE15+T from Maxim Integrated is a low-dropout linear regulator (LDO) with fixed 1.5V output, delivering guaranteed 1A load current at 210mV dropout, ±1% output voltage accuracy over temperature, and 125µA ground current. It integrates a reset output with 4ms delay, thermal-overload protection, and short-circuit current limiting - designed for space-constrained, battery-powered systems requiring stable low-voltage rail generation.
For engineers reviewing the MAX1793EUE15+T datasheet, MAX1793EUE15+T pinout, MAX1793EUE15+T application, or MAX1793EUE15+T equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters across -40°C to +85°C, and real-world selection guidance for portable power management in handheld instruments, PDAs, and cellular baseband subsystems.
Technical Context
The MAX1793EUE15+T uses an internal p-channel MOSFET pass transistor enabling low quiescent current (125µA at light load) and stable operation in dropout without base-drive losses. Its Dual Mode™ architecture selects between factory-trimmed 1.5V output (SET = GND) and adjustable mode (1.25V–5.0V) via external resistor divider.
It features a dedicated open-drain RST output asserting low when VOUT drops below 94% of nominal (1.41V), holding for ≥4ms after recovery; shutdown reduces supply current to 0.1µA while pulling OUT low via 5kΩ internal resistance. Thermal shutdown activates at +170°C with ~20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1% over -40°C to +85°C, ensuring stable core logic or memory I/O rail without external feedback components. |
| Dropout Voltage | 210mV at 1A load, enabling operation down to VIN = 1.71V - critical for extending usable battery life in single-cell Li-ion or Li-poly systems. |
| Ground Current | 125µA at 100µA load, minimizing standby power loss in always-on subsystems such as real-time clocks or sensor interfaces. |
| Reset Threshold | 94% of nominal VOUT (1.41V), with 4ms release delay - provides reliable power-on-reset timing for microcontrollers without external RC networks. |
| Shutdown Current | 0.1µA typical, allowing deep-sleep modes in portable devices where system-level power budget is sub-1µA. |
| Output Noise | 115µVRMS (10Hz–1MHz), suitable for noise-sensitive analog circuits like ADC references or RF front-end bias rails. |
| Thermal Protection | Activates at +170°C junction temperature with 20°C hysteresis, preventing permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
The MAX1793EUE15+T is housed in a 16-pin TSSOP-EP package (U16E-3 outline) with exposed thermal pad (EP), measuring 5mm × 4.4mm × 1.1mm. The EP and GND pin serve as primary thermal paths; both must be soldered to a large PCB ground plane (≥1 in² recommended) for rated 1.5W dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 9, 16 | N.C. | No internal connection; must remain unconnected per datasheet to avoid parasitic coupling or EMI. |
| 2–5 | IN | Input supply (2.5V–5.5V); four parallel pins reduce trace resistance and improve current handling - requires 4.7µF ceramic bypass to GND. |
| 6 | RST | Open-drain reset output; sinks current when VOUT < 1.41V; needs external 100kΩ pull-up to OUT or logic rail for clean POR signal. |
| 7 | SHDN | Active-low shutdown control; logic low disables regulation and forces RST low and OUT discharge via 5kΩ internal resistor. |
| 10 | GND | Power and signal ground reference; also functions as heatsink - must be connected to large copper area or ground plane. |
| 11 | SET | Voltage-setting input; tied to GND for 1.5V fixed mode; floating or >50mV enables adjustable mode - impedance to GND must be <10kΩ in fixed mode. |
| 12–15 | OUT | Regulated 1.5V output; four parallel pins minimize IR drop and improve transient response - requires 6.8µF low-ESR (<0.5Ω) capacitor to GND. |
| EP | Exposed Pad | Thermal and electrical ground connection; mandatory soldering to PCB ground plane for thermal performance and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Output Selection | Factory-trimmed 1.5V output enabled by grounding SET pin - eliminates external resistors and layout complexity for fixed-rail applications. |
| Low Dropout at Full Load | 210mV dropout at 1A ensures usable output from depleted batteries (e.g., 1.71V minimum input for 1.5V rail), extending runtime in portable gear. |
| Integrated Reset with Timing Control | 4ms RST release delay guarantees microcontroller reset hold time meets ARM Cortex-M or similar MCU requirements without external timers. |
| Ultra-Low Quiescent Current | 125µA ground current at light load preserves battery capacity in sleep states - critical for multi-week standby in handheld medical instruments. |
| Robust Fault Protection | Combined short-circuit current limit (1.1–3.3A), thermal shutdown (+170°C), and undervoltage lockout (2.0–2.3V) prevent field failures under abnormal conditions. |
Applications
| Handheld Instruments | Cellular Phone Baseband |
|---|---|
|
Use Scenario: Portable multimeters and oscilloscopes requiring stable 1.5V supply for precision ADC reference and low-noise analog front-end. IC Role / Device Role / Timing Role: Primary LDO supplying 1.5V rail to 16-bit SAR ADC and op-amp signal chain, with RST used as POR for embedded MCU. Use Value: 115µVRMS noise and ±1% accuracy ensure <0.01% measurement error; 210mV dropout allows operation from 2-cell alkaline packs down to 1.7V per cell. |
Use Scenario: Powering baseband processor I/O banks in GSM/UMTS handsets where tight voltage tolerance and fast transient response are mandatory. IC Role / Device Role / Timing Role: Dedicated 1.5V LDO for processor I/O interface, synchronized with SHDN to enter low-power state during idle periods. Use Value: 125µA ground current minimizes standby drain; 4ms RST delay satisfies Qualcomm MSM62xx reset timing specs without added components. |
| PDA System Memory | Modem Data Interface |
|
Use Scenario: Supplying 1.5V to LPDDR SDRAM in palmtop computers where voltage ripple directly impacts data integrity. IC Role / Device Role / Timing Role: Low-noise LDO decoupling memory VDDQ rail, with OUT pins paralleled to reduce AC impedance and improve PSRR above 10kHz. Use Value: 6.8µF low-ESR output cap + 115µVRMS noise prevents bit errors during high-speed burst reads; thermal pad ensures 1A load stability on compact PCBs. |
Use Scenario: Providing regulated 1.5V to UART/USB PHY transceivers in DSL/cable modems where ESD immunity and supply rejection matter. IC Role / Device Role / Timing Role: Isolated LDO for serial interface logic, using SHDN to gate power during link sleep mode per IEEE 802.3az. Use Value: 0.1µA shutdown current meets Energy Star modem idle power targets; 5kΩ internal pulldown discharges OUT safely during hot-plug events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout, 1A LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS7A4701RGWR | 1.5V fixed output, 200mV dropout at 1A, but higher 1.2mA quiescent current and no integrated RST output. | Lacks built-in reset function - requires external supervisor IC for POR, increasing BOM count and board area. | Choose when ultra-low noise (4.7µVRMS) is prioritized over reset integration and shutdown current. |
| Analog Devices ADP1740ACPZ-1.5-R7 | 1.5V fixed output, 250mV dropout at 1A, 250µA ground current, and no RST or thermal shutdown. | No fault protection beyond current limit - unsuitable for unattended industrial modems or handhelds with variable thermal environments. | Prefer when cost sensitivity outweighs need for reset timing control and thermal safety margin. |
Compared with TPS7A4701RGWR and ADP1740ACPZ-1.5-R7, the MAX1793EUE15+T uniquely combines 125µA ground current, integrated 4ms RST, and thermal shutdown in a 1.1mm-profile TSSOP-EP - making it optimal for battery-powered designs where size, safety, and low-quiescent operation are co-constrained.
Availability
The MAX1793EUE15+T is available at Aetrix Electronics and suitable for handheld instruments, cellular phone baseband subsystems, and PDA memory power rails requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.
Supply support for MAX1793EUE15+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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX1793EUE15+T belongs to Maxim's low-IQ LDO product line, engineered specifically for portable electronics demanding high accuracy, minimal dropout, and integrated system supervision in ultra-thin form factors.
FAQ
What is the maximum input voltage rating for the MAX1793EUE15+T?
The MAX1793EUE15+T has an absolute maximum input voltage of +6V referenced to GND. Its operational input range is specified from +2.5V to +5.5V. Exceeding +6V may cause permanent damage, and operation below +2.5V triggers undervoltage lockout (2.0–2.3V threshold), disabling regulation until input recovers.
Does the MAX1793EUE15+T require external capacitors, and what values are recommended?
Yes, the MAX1793EUE15+T requires two external capacitors: a 4.7µF ceramic capacitor between IN and GND, and a 6.8µF low-ESR (<0.5Ω) capacitor between OUT and GND. These values ensure stability, transient response, and noise suppression - deviations risk oscillation or degraded PSRR, especially under dynamic load conditions.
How does the RST output behave during shutdown of the MAX1793EUE15+T?
During shutdown (SHDN = GND), the RST output of the MAX1793EUE15+T is actively driven low. This behavior is independent of VOUT level and provides a deterministic reset signal to downstream logic, simplifying power sequencing in multi-rail systems where controlled startup/shutdown order is required.
Can the MAX1793EUE15+T be used in adjustable-output mode, and what is the minimum output voltage?
No - the MAX1793EUE15+T is factory-trimmed for fixed 1.5V output only. While the underlying MAX1793 family supports adjustable mode via the SET pin, the EUE15+T variant is configured exclusively for 1.5V preset operation. Attempting to configure it as adjustable will not yield stable regulation outside its trimmed specification.
What thermal design considerations apply to the MAX1793EUE15+T in high-current applications?
The MAX1793EUE15+T requires soldering both the exposed pad (EP) and GND pin to a large PCB ground plane (minimum 1 in²) to achieve its rated 1.5W power dissipation. Without proper thermal vias and copper area, junction temperature can exceed +150°C at 1A load with >1V input-output differential, triggering thermal shutdown and intermittent operation.
MAX1793EUE15+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 (1.5V)
- 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
MAX1793EUE15+T FAQ
1.How can I place an order for MAX1793EUE15+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1793EUE15+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 MAX1793EUE15+T reliable?
The price and inventory of MAX1793EUE15+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1793EUE15+T is usually 5 days.
3.What payment methods are accepted for MAX1793EUE15+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1793EUE15+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1793EUE15+T?
MAX1793EUE15+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1793EUE15+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 MAX1793EUE15+T?
For technical support, including MAX1793EUE15+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1793EUE15+T requirements.
6.How does Aetrix verify that MAX1793EUE15+T is sourced from the original manufacturer or authorized distributors?
All MAX1793EUE15+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 MAX1793EUE15+T meets industry standards.
7.What is the process for return or replacement of MAX1793EUE15+T?
All MAX1793EUE15+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1793EUE15+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 MAX1793EUE15+T part is unused and in its original packaging.
Return procedure for MAX1793EUE15+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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