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Analog Devices Inc./Maxim Integrated MAX1836EUT50+T
- Part No.:
- MAX1836EUT50+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX1836EUT50+T.pdf
- Description:
- IC REG BUCK 5V 125MA SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,530
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Product details
Overview
The MAX1836EUT50+T from Maxim Integrated is a high-efficiency, 6-pin SOT23 step-down DC-DC converter with preset 5.0V output, 4.5V–24V input range, 125mA load capability, and 12μA quiescent current-designed for space-constrained battery-powered systems such as handheld devices and industrial control supplies.
For engineers reviewing the MAX1836EUT50+T datasheet, MAX1836EUT50+T pinout, MAX1836EUT50+T application, or MAX1836EUT50+T equivalent, key selection criteria include dropout voltage (120mV at 100mA), 100% duty-cycle operation, internal 24V P-channel MOSFET, and compatibility with low-ESR ceramic or polymer output capacitors in compact layouts.
Technical Context
This device implements a proprietary current-limited control architecture operating up to 100% duty cycle, enabling ultra-low dropout performance and variable-frequency switching that scales with load. It integrates an internal 24V-rated P-channel MOSFET with 2Ω typical on-resistance and uses dual-mode feedback (preset or adjustable via external divider) referenced to a 1.25V internal bandgap.
Thermal protection activates at +160°C with 10°C hysteresis, and shutdown reduces supply current to 3μA. The control loop relies on zero-crossing detection and minimum off-time (0.2–0.6μs) to maintain stability in discontinuous conduction mode across its full input and load range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 24V - supports wide-input industrial and battery systems including 9V, 12V, and 24V rails without external regulators. |
| Output Voltage | Preset 5.00V ±2% (4.80–5.20V) - factory-trimmed for stable 5V rail generation without external resistors. |
| Max Output Current | 125mA - sufficient for low-power microcontrollers, sensors, and interface ICs in portable equipment. |
| Quiescent Current | 12μA - extends battery life in always-on or sleep-mode applications like remote sensors and backup supplies. |
| Dropout Voltage | 120mV at 100mA - enables operation down to VIN = 5.12V while maintaining regulation, critical for end-of-life battery use. |
| Switching On-Resistance | 2Ω (typ) - limits conduction loss and thermal rise in the integrated P-channel MOSFET under full load. |
| Shutdown Current | 3μA - ensures minimal leakage during system standby, supporting ultra-low-power design goals. |
Pinout & Package
MAX1836EUT50+T is housed in a RoHS-compliant 6-pin SOT23 package (3.0mm × 1.7mm × 1.3mm) with exposed pad for thermal enhancement and ground connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Dual-mode feedback input | Grounded for preset 5V operation; connected to resistive divider for adjustable outputs (1.25V–VIN); threshold is 1.25V ±50mV. |
| 2 GND | Power and signal ground reference | Common return path for internal circuitry, LX switch, and exposed pad; must be low-impedance for stability and thermal dissipation. |
| 3 IN | Main power input | Accepts 4.5V–24V; connects to source of internal P-channel MOSFET; includes undervoltage lockout (3.55–4.4V). |
| 4 LX | Switch node | Drain of internal P-MOSFET; drives external inductor; rated for −2V to (VIN + 0.3V); requires low-inductance layout. |
| 5 SHDN | Logic-controlled enable/disable | Active-low input; <0.8V disables regulator (3μA ISHDN); >2.4V enables; must not float; slew rate ≥10V/ms. |
| 6 OUT | High-impedance output sense | Internally tied to feedback divider; connect to regulated output for preset mode; tie to GND when using external feedback. |
Key Features
| Feature | Design Value |
|---|---|
| 100% duty-cycle operation | Enables lowest possible dropout voltage by keeping internal P-MOSFET fully on when VIN approaches VOUT, extending usable battery voltage range. |
| Current-limited control scheme | Eliminates fixed-frequency PWM overhead; switching frequency varies with load, reducing light-load supply current to 12μA. |
| Integrated 24V P-channel MOSFET | Removes need for external high-voltage switch; simplifies BOM and layout while supporting input up to 24V without level-shifting. |
| Dual-mode feedback (preset/adjustable) | Factory-set 5V output requires no external components; adjustable mode supports 1.25V–VIN via resistor divider with 1.25V reference accuracy. |
| Thermal shutdown with hysteresis | Protects against sustained overload; shuts down at +160°C and recovers after cooling 10°C, preventing latch-up or damage. |
Applications
| Handheld Devices | Industrial Control Supplies |
|---|---|
Use Scenario: Powering low-power microcontrollers and sensors in portable test meters and wireless transceivers. IC Role / Device Role / Timing Role: Primary 5V step-down regulator delivering stable rail from single 9V alkaline or Li-ion battery. Use Value: 12μA quiescent current and 100% duty cycle extend battery life and support deep-sleep modes without brownout. |
Use Scenario: Providing isolated 5V logic supply in programmable logic controllers (PLCs) and sensor nodes. IC Role / Device Role / Timing Role: Compact, high-input-voltage DC-DC stage converting 24V industrial bus to clean 5V for digital I/O and communication ICs. Use Value: 24V-rated internal switch eliminates external HV FET; 120mV dropout ensures regulation even as 24V rail sags under load. |
| 9V Battery Systems | Backup Supplies |
Use Scenario: Regulating 5V rail in legacy 9V-powered instrumentation where space and efficiency are constrained. IC Role / Device Role / Timing Role: High-efficiency buck converter replacing linear regulators to reduce heat and improve runtime. Use Value: >90% efficiency across 10–125mA loads minimizes thermal stress in sealed enclosures; SOT23 footprint saves PCB area. |
Use Scenario: Maintaining 5V supply during main power failure in security systems and memory retention circuits. IC Role / Device Role / Timing Role: Low-quiescent-current buck regulator powered from backup supercapacitor or coin cell. Use Value: 3μA shutdown current preserves backup energy; 4.5V UVLO prevents operation below safe capacitor voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1776ETA+T | Higher output current (500mA), same 6-pin TDFN package, 24V internal switch, but fixed 5V output only; no adjustable mode. | Supports higher-power loads (e.g., motor drivers, multiple peripherals); requires larger inductor due to higher peak current. | Select MAX1776ETA+T when >125mA load current is required and board space allows TDFN; verify thermal margin at full load. |
| TPS62231DRYR | 3MHz fixed-frequency PWM, 300mA output, 2.05–6.5V input, 5V preset; smaller 6-pin WSON (2mm × 2mm); no 100% duty cycle. | Better transient response for fast-digital loads; lower input voltage ceiling limits use in 9V/12V/24V systems. | Choose TPS62231DRYR for compact, high-frequency designs with <6.5V input and tighter ripple requirements; not suitable for 24V inputs. |
Compared with MAX1776ETA+T and TPS62231DRYR, the MAX1836EUT50+T uniquely balances ultra-low quiescent current (12μA), 24V input tolerance, and 100% duty-cycle dropout performance in the smallest SOT23 footprint-making it optimal for long-life, wide-input, space-limited battery systems.
Availability
MAX1836EUT50+T is available at Aetrix Electronics and suitable for handheld devices, industrial control supplies, and 9V battery systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1836EUT50+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 precision analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX1836/MAX1837 product line was designed specifically for low-power, wide-input-voltage DC-DC conversion in battery-operated and distributed power systems-emphasizing efficiency, small size, and dropout resilience.
FAQ
What is the preset output voltage of the MAX1836EUT50+T?
The MAX1836EUT50+T is factory-configured for a precise 5.00V output with ±2% tolerance (4.80V to 5.20V) under loads from 0 to 125mA. This preset mode requires only FB connected to GND and OUT tied to the regulated output-no external resistors needed. The "50" suffix in MAX1836EUT50+T explicitly denotes the 5V variant.
Can the MAX1836EUT50+T operate from a 24V input?
Yes, the MAX1836EUT50+T supports input voltages from 4.5V to 24V per its Absolute Maximum Ratings and Electrical Characteristics. Its integrated 24V-rated P-channel MOSFET and internal current-limiting architecture allow reliable operation across this full range, making it suitable for industrial 24V rails and high-voltage battery stacks.
How does the MAX1836EUT50+T achieve low dropout performance?
The MAX1836EUT50+T achieves 120mV dropout at 100mA by supporting up to 100% duty cycle-keeping its internal P-MOSFET fully on when input voltage nears the 5V output. This eliminates switching losses in dropout region and minimizes voltage drop across the MOSFET's 2Ω on-resistance and inductor DCR, extending usable battery life.
What is the shutdown current of the MAX1836EUT50+T?
The MAX1836EUT50+T draws just 3μA in shutdown mode when the SHDN pin is pulled low. This ultra-low leakage preserves battery energy in standby or off-state conditions. The SHDN input has a defined threshold (0.8V max for disable, 2.4V min for enable) and requires ≥10V/ms slew rate to ensure robust transition.
Is the MAX1836EUT50+T compatible with ceramic output capacitors?
Yes, the MAX1836EUT50+T is fully compatible with low-ESR ceramic output capacitors. Its current-limited control architecture and internal compensation are optimized for stability with 10μF–100μF X5R/X7R ceramics. For best ripple performance, pair a 10–68μF ceramic with a 0.1μF high-frequency bypass capacitor close to the OUT and GND pins.
MAX1836EUT50+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 125mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX1836EUT50+T FAQ
1.How can I place an order for MAX1836EUT50+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1836EUT50+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 MAX1836EUT50+T reliable?
The price and inventory of MAX1836EUT50+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1836EUT50+T is usually 5 days.
3.What payment methods are accepted for MAX1836EUT50+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1836EUT50+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1836EUT50+T?
MAX1836EUT50+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1836EUT50+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 MAX1836EUT50+T?
For technical support, including MAX1836EUT50+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1836EUT50+T requirements.
6.How does Aetrix verify that MAX1836EUT50+T is sourced from the original manufacturer or authorized distributors?
All MAX1836EUT50+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 MAX1836EUT50+T meets industry standards.
7.What is the process for return or replacement of MAX1836EUT50+T?
All MAX1836EUT50+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1836EUT50+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 MAX1836EUT50+T part is unused and in its original packaging.
Return procedure for MAX1836EUT50+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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