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Analog Devices Inc./Maxim Integrated MAX4834EUT25C
- Part No.:
- MAX4834EUT25C
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX4834EUT25C.pdf
- Description:
- 250MA LDO LINEAR REGULATORS WITH
- Quantity:
- Payment:
- Shipping:
Inventory:1,858
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Product details
Overview
MAX4834EUT25C from Maxim Integrated is a 250mA, 2.5V fixed-output low-dropout linear regulator with integrated current-limiting switch and open-drain FLAG output for overcurrent detection. It operates from 2.5V to 5.5V input, delivers ±2% output voltage accuracy over –40°C to +85°C, features 90µA quiescent current, reverse-current protection, and thermal shutdown - deployed in USB port power management and SDIO interface rails.
For engineers reviewing the MAX4834EUT25C datasheet, MAX4834EUT25C pinout, MAX4834EUT25C application, or MAX4834EUT25C equivalent, key selection criteria include its 250mA guaranteed load current, 165mV dropout at full load, programmable soft-start via external capacitor, FLAG latching behavior after blanking time, and SOT23-6 package compatibility with space-constrained portable designs.
Technical Context
The MAX4834EUT25C integrates a BiCMOS pass transistor with accurate current-limit circuitry (270–330mA trip range) and a dedicated FLAG comparator that asserts low only after sustained overload exceeds the blanking time (5–17ms). Its internal 1.23V reference and error amplifier regulate output to 2.5V with ±2% tolerance across temperature and load.
Soft-start is implemented via an external capacitor on the SS pin, enabling controlled output ramp-up (1ms minimum, up to 150ms with 0.1µF); shutdown reduces quiescent current to 0.1µA while disabling pass transistor, reference, and control circuitry. Reverse-current protection ensures IN current remains below 2µA when VOUT ≥ VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2% - stable rail for 2.5V logic, USB PHY, or SDIO I/O without external feedback. |
| Max Load Current | 250mA guaranteed - supports high-pulse peripherals like SD cards or USB transceivers. |
| Dropout Voltage | 165mV at 250mA - enables operation down to VIN = 2.665V while maintaining regulation. |
| Quiescent Current | 90µA at full load - minimizes standby power in battery-powered systems. |
| Shutdown Current | 0.1µA - enables ultra-low-power sleep modes in portable devices. |
| Current Limit | 270–330mA - protects downstream circuitry during short-circuit or overload events. |
| FLAG Blanking Time | 5–17ms - prevents false triggering during startup inrush or transient overloads. |
Pinout & Package
MAX4834EUT25C is housed in a 6-pin SOT23-6 package (3.0mm × 1.7mm × 1.3mm), with exposed pad internally connected to GND for thermal enhancement. Pin 1 is IN; Pin 2 is GND; Pin 3 is SHDN/FLAG; Pin 4 is unused (NC) in MAX4834 variant; Pin 5 is SS; Pin 6 is OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Power Supply | Bypassed with 0.1µF ceramic capacitor; accepts 2.5V–5.5V input for regulation. |
| 2 (GND) | Ground Reference | Common return path for IN, OUT, SHDN, SS, and FLAG; connects to EP for thermal relief. |
| 3 (SHDN) | Active-Low Shutdown Control | Pull low to disable regulator and reduce IQ to 0.1µA; tie to IN for always-on operation. |
| 4 (FLAG) | Open-Drain Overcurrent Flag | Asserts low after sustained overload > blanking time; requires external pull-up for µC monitoring. |
| 5 (SS) | Soft-Start Timing Input | Connect external capacitor (0–0.1µF) to set output rise time from 1ms to 150ms. |
| 6 (OUT) | Regulated Output | Delivers 2.5V ±2% to load; bypassed with ≥3.3µF ceramic cap (ESR <0.2Ω) for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Latched FLAG output | Prevents repeated fault cycling by holding FLAG low until IN or SHDN is toggled - simplifies host firmware interrupt handling. |
| Reverse-current protection | Guarantees IN leakage ≤2µA when VOUT ≥ VIN - eliminates backfeed risk in multi-rail systems. |
| Programmable soft-start | External CSS capacitor sets tSS from 1ms to 150ms - eliminates inrush-induced supply droop or false resets. |
| Thermal shutdown with hysteresis | Turns off pass transistor at TJ = +165°C and re-enables at +150°C - provides self-recovering fault protection. |
| Ultra-low shutdown current | 0.1µA shutdown IQ enables >10-year battery life in always-connected IoT sensors. |
Applications
| USB Port Power Switching | SDIO Interface Rail Regulation |
|---|---|
|
Use Scenario: Providing clean, current-limited 2.5V power to USB OTG peripherals during hot-plug events. IC Role / Device Role / Timing Role: LDO regulator with FLAG-based overcurrent detection and latch-off behavior to prevent bus collapse. Use Value: Guarantees 250mA delivery with 165mV dropout at full load, enabling reliable operation even with marginal 2.7V USB VBUS. |
Use Scenario: Powering SDIO host controllers and memory cards in handheld GPS units. IC Role / Device Role / Timing Role: Fixed 2.5V LDO with programmable soft-start to avoid SD card initialization failures due to fast-rising VCC. Use Value: ±2% output accuracy and 90µA quiescent current extend battery runtime while ensuring SDIO timing compliance. |
| Notebook Subsystem Power | Cell Phone Baseband Core Supply |
|
Use Scenario: Delivering regulated 2.5V to embedded audio codecs or touch controller ICs in ultrabooks. IC Role / Device Role / Timing Role: Low-noise (70µVRMS), reverse-current protected LDO with thermal shutdown for thermally dense layouts. Use Value: 0.2Ω ESR-compatible output capacitance and 15kV HBM ESD protection at OUT simplify layout and improve field reliability. |
Use Scenario: Supplying 2.5V to baseband processor I/O banks during burst transmission cycles. IC Role / Device Role / Timing Role: Current-limiting switch with FLAG latching to isolate faulty loads before thermal runaway occurs. Use Value: 270–330mA precise current limit and 5–17ms blanking window prevent nuisance shutdowns during RF transmit peaks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4832EUT25C | 100mA rated output current; identical pinout, FLAG function, and 2.5V output. | Lower current capability limits use to low-power peripherals (e.g., I²C sensors), not SDIO or USB. | Select when load current stays ≤100mA and board space/layout reuse is critical. |
| MAX4836EUT25C | 500mA rated output current; same FLAG functionality, 2.5V output, and SOT23-6 footprint. | Higher thermal dissipation requires careful PCB copper area design; supports higher-pulse loads. | Choose for future-proofing or when peak loads exceed 250mA but pin compatibility must be retained. |
Compared with MAX4834EUT25C, MAX4832EUT25C offers lower cost and smaller thermal footprint for light loads, while MAX4836EUT25C extends headroom for dynamic loads - all three share identical FLAG signaling, soft-start architecture, and 2.5V regulation, enabling drop-in validation where current margin allows.
Availability
MAX4834EUT25C is available at Aetrix Electronics and suitable for USB port power switching, SDIO interface regulation, and notebook subsystem power requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across –40°C to +85°C.
Supply support for MAX4834EUT25C 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 portable applications.
The MAX4834/MAX4835 family was engineered specifically for current-limited, low-quiescent-power LDO applications in space-constrained portable electronics - emphasizing FLAG/RESET fault signaling, soft-start control, and robust thermal/reverse-current protection.
FAQ
What is the output voltage tolerance of the MAX4834EUT25C over temperature and load?
The MAX4834EUT25C maintains ±2% output voltage accuracy across –40°C to +85°C and for load currents from 1mA to 250mA. This specification is guaranteed by design and correlation testing - not just typical - ensuring consistent 2.5V regulation in real-world portable device operating conditions without external trimming.
How does the FLAG output behave during a sustained overcurrent event on the MAX4834EUT25C?
When load current exceeds the 270–330mA limit for longer than the blanking time (5–17ms), the MAX4834EUT25C asserts its open-drain FLAG low and latches the pass transistor off. Recovery requires toggling either IN or SHDN - this prevents automatic restart into fault, giving the host system time to diagnose and clear the overload condition before resuming regulation.
Can the MAX4834EUT25C be used with no external soft-start capacitor?
Yes - the MAX4834EUT25C includes a fixed 1ms internal soft-start timer. With SS pin left floating or unconnected, the output rises from 10% to 90% of 2.5V in approximately 1ms. Adding an external capacitor (e.g., 0.01µF) extends tSS to ~10ms, allowing further inrush current control for sensitive downstream loads.
Does the MAX4834EUT25C provide reverse-current protection, and how is it verified?
Yes - the MAX4834EUT25C guarantees reverse current ≤2µA when VOUT ≥ VIN (e.g., 5.5V at OUT, 0V at IN). This is specified in the Electrical Characteristics table under "Reverse Current at VIN" and validated across temperature. It prevents backfeeding into upstream supplies, critical in multi-rail battery-powered systems.
What is the thermal shutdown behavior of the MAX4834EUT25C, and does it auto-recover?
The MAX4834EUT25C enters thermal shutdown at +165°C junction temperature and auto-recovers once TJ cools to +150°C (15°C hysteresis). During continuous overload, this results in pulsed output - a fail-safe mechanism that prevents permanent damage while allowing limited functionality during intermittent thermal stress.
MAX4834EUT25C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Reset, Soft Start
- Protection Features:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
MAX4834EUT25C FAQ
1.How can I place an order for MAX4834EUT25C through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4834EUT25C 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 MAX4834EUT25C reliable?
The price and inventory of MAX4834EUT25C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4834EUT25C is usually 5 days.
3.What payment methods are accepted for MAX4834EUT25C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4834EUT25C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4834EUT25C?
MAX4834EUT25C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4834EUT25C 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 MAX4834EUT25C?
For technical support, including MAX4834EUT25C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4834EUT25C requirements.
6.How does Aetrix verify that MAX4834EUT25C is sourced from the original manufacturer or authorized distributors?
All MAX4834EUT25C 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 MAX4834EUT25C meets industry standards.
7.What is the process for return or replacement of MAX4834EUT25C?
All MAX4834EUT25C units undergo pre-shipment inspection (PSI). If there is an issue with MAX4834EUT25C, 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 MAX4834EUT25C part is unused and in its original packaging.
Return procedure for MAX4834EUT25C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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