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Analog Devices Inc./Maxim Integrated MAX4836EUT33C
- Part No.:
- MAX4836EUT33C
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX4836EUT33C.pdf
- Description:
- 500MA, LDO LINEAR REGULATOR WITH
- Quantity:
- Payment:
- Shipping:
Inventory:2,166
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Product details
Overview
The MAX4836EUT33C from Maxim Integrated is a 3.3V, 500mA 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, features 90µA quiescent current, reverse-current protection, and thermal shutdown, and is used in USB port power management and SDIO interface regulation.
For engineers reviewing the MAX4836EUT33C datasheet, MAX4836EUT33C pinout, MAX4836EUT33C application, or MAX4836EUT33C equivalent, key selection criteria include its 3.3V fixed output, FLAG-based overload notification, soft-start programmability via external capacitor, and SOT23-6 package compatibility with space-constrained portable electronics designs.
Technical Context
The MAX4836EUT33C implements a BiCMOS-based LDO architecture with an internal P-channel pass transistor, precision voltage reference (1.23V), and error amplifier. Its FLAG function asserts low after sustained overcurrent exceeding 540–660mA for >5ms (blanking time), latching off the pass transistor until IN or SHDN is cycled.
Soft-start is controlled by an external capacitor on the SS pin, enabling programmable output ramp time (1ms minimum, up to 150ms with 0.1µF); dropout voltage remains ≤330mV at 500mA load across –40°C to +85°C, and reverse-current protection limits IN leakage to ≤2µA when VOUT ≥ VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% over –40°C to +85°C; enables direct replacement of 3.3V logic rails without external feedback. |
| Max Load Current | 500mA guaranteed; supports high-current peripherals like USB transceivers and SD card controllers. |
| Dropout Voltage | ≤330mV at 500mA; allows operation with VIN as low as 3.63V while maintaining regulated 3.3V output. |
| Quiescent Current | 90µA typical at full load; minimizes standby power loss in battery-powered systems. |
| FLAG Blanking Time | 5–17ms; prevents false triggering during startup inrush or transient overload conditions. |
| Shutdown Current | 0.1µA max; ensures ultra-low leakage during system sleep modes. |
| Input Voltage Range | 2.5V to 5.5V; compatible with single-cell Li-ion, 3.3V/5V rails, and wide-input DC-DC stages. |
Pinout & Package
MAX4836EUT33C is housed in a 6-pin SOT23-6 package (3.0mm × 1.7mm × 1.3mm) with GND-connected exposed pad not present in SOT23; thermal performance relies on PCB copper area under pins 1–6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power Input | Bypass with 0.1µF ceramic capacitor; must be ≥2.5V and ≤5.5V; supplies internal reference and pass transistor. |
| 2 GND | Ground Reference | Primary return path for load current, control circuitry, and internal bias; connects to system ground plane. |
| 3 SHDN | Active-Low Enable | Pull low to enter 0.1µA shutdown; tie to IN or >1.4V to enable; includes 30mV hysteresis for noise immunity. |
| 4 FLAG | Open-Drain Overcurrent Flag | Asserts low when load current exceeds limit for >tBLANK; requires external pull-up to logic supply (e.g., 3.3V). |
| 5 SS | Soft-Start Control | Connect external capacitor (0–0.1µF) to GND to set output rise time; floating = 1ms default. |
| 6 OUT | Regulated Output | Delivers 3.3V to load; bypass with ≥3.3µF ceramic capacitor (ESR <0.2Ω) for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Accurate current limiting | 540–660mA threshold with ±10% tolerance; enables reliable short-circuit protection without external sensing. |
| Latched-off FLAG response | Pass transistor disables and FLAG holds low until IN/SHDN reset cycle; prevents uncontrolled current flow during fault. |
| Reverse-current protection | IN leakage ≤2µA when VOUT ≥ VIN; eliminates backfeed into upstream power sources during hot-swap or backup scenarios. |
| Thermal shutdown with hysteresis | Triggers at +165°C junction temperature; re-enables after 15°C cooldown, enabling safe pulsed operation under overload. |
| Programmable soft-start | tSS = CSS (nF) ms; supports 1–150ms ramp times to eliminate inrush current spikes into large capacitive loads. |
Applications
| USB Port Power Switching | SDIO Interface Regulation |
|---|---|
|
Use Scenario: Providing clean, current-limited 3.3V power to USB peripheral ports in notebooks and docking stations. IC Role / Device Role / Timing Role: LDO regulator with overcurrent flag; monitors load current and signals host controller upon violation. Use Value: Prevents bus overcurrent faults by latching off during sustained >500mA draw, protecting host controller and cable integrity. |
Use Scenario: Supplying stable 3.3V to SDIO cards and controllers in handheld devices and GPS modules. IC Role / Device Role / Timing Role: Fixed-output LDO with reverse-current blocking; isolates SDIO card power domain from main system rail. Use Value: Eliminates backfeed from inserted SD cards into system power, avoiding unintended wake-up or voltage droop on shared rails. |
| Notebook System Rail Protection | Cell Phone Baseband Core Supply |
|
Use Scenario: Delivering 3.3V to auxiliary subsystems (e.g., touch controller, audio codec) with fault reporting. IC Role / Device Role / Timing Role: Current-limiting switch with FLAG output; acts as intelligent power gate with diagnostic feedback. Use Value: Enables firmware-level fault logging and graceful shutdown when peripheral shorts or draws excess current. |
Use Scenario: Regulating 3.3V for baseband processor I/O interfaces in cellular handsets operating from single-cell Li-ion. IC Role / Device Role / Timing Role: Low-IQ LDO with thermal and overcurrent protection; maintains rail integrity during RF burst transmission. Use Value: Sustains regulation down to VIN = 3.63V (3.3V + 330mV dropout), maximizing battery runtime before brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO current-limiting switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4836ETT33C | TDFN-6 package (3mm × 3mm), exposed paddle connected to GND; 24.4mW/°C thermal derating vs. SOT23's 9.1mW/°C. | Better thermal performance at high ambient or continuous 500mA load; requires PCB thermal pad layout. | Select for higher-power-density designs where board space permits TDFN and thermal management is critical. |
| MAX4834EUT33C | 250mA rated output; same FLAG function, soft-start, and 3.3V output; lower current limit (320–390mA) and 60mV higher dropout. | Suitable for lower-current peripherals (e.g., UART, I²C sensors); cannot support 500mA USB or SDIO loads. | Choose when load current is confirmed ≤250mA and cost or footprint reduction outweighs headroom requirements. |
Compared with MAX4836ETT33C, the MAX4836EUT33C offers identical electrical specs but lower thermal capability in SOT23; compared with MAX4834EUT33C, it delivers double the current capacity and tighter dropout-critical for margin-sensitive 3.3V rail designs.
Availability
MAX4836EUT33C is available at Aetrix Electronics and suitable for USB port power switching, SDIO interface regulation, and notebook system rail protection requiring stable component supply across industrial temperature ranges.
Supply support for MAX4836EUT33C 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 MAX4836/MAX4837 product line was designed specifically for portable electronics requiring accurate current-limited 3.3V/2.8V/2.5V/1.8V regulation with fault signaling-targeting USB, SDIO, and baseband power domains.
FAQ
What is the output voltage tolerance of the MAX4836EUT33C over temperature?
The MAX4836EUT33C guarantees ±2% output voltage accuracy over the full –40°C to +85°C operating range. At +25°C, typical deviation is tighter, and normalized output voltage vs. temperature plots show drift within ±0.4% of nominal across the range. This tolerance ensures reliable interfacing with 3.3V logic families without additional regulation.
How does the FLAG output behave during a short-circuit event on the MAX4836EUT33C output?
When the MAX4836EUT33C output is shorted to GND, the device enters current-limit mode. If the overload persists beyond the blanking time (5–17ms), the FLAG pin asserts low and the pass transistor latches off. The latch remains active until IN or SHDN is cycled high-to-low-to-high; FLAG stays low during thermal shutdown or shutdown mode.
Can the MAX4836EUT33C be used with no external soft-start capacitor?
Yes-the MAX4836EUT33C includes a fixed 1ms internal soft-start timer. With SS pin left floating or unconnected, the output rises from 10% to 90% of 3.3V in approximately 1ms. Adding a capacitor (e.g., 0.01µF) extends tSS to ~10ms, reducing inrush into large output capacitance or downstream loads.
What is the maximum allowable input voltage for the MAX4836EUT33C?
The absolute maximum input voltage for the MAX4836EUT33C is +6V referenced to GND. However, the recommended operating range is 2.5V to 5.5V. Exceeding 5.5V risks violating the 6V absolute rating on IN, especially under transient conditions, and may degrade long-term reliability or trigger undervoltage lockout hysteresis anomalies.
Does the MAX4836EUT33C provide reverse-current protection, and how is it verified?
Yes-the MAX4836EUT33C guarantees reverse-current protection: when VOUT ≥ VIN (e.g., during hot-swap or backup power scenarios), IN leakage is limited to ≤2µA at VOUT = 5.5V. This is specified in the Electrical Characteristics table under "Reverse Current at VIN" and validated across temperature, ensuring no backfeed into upstream sources.
MAX4836EUT33C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- -
- Output Type:
- -
- Number of Regulators:
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- -
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX4836EUT33C FAQ
1.How can I place an order for MAX4836EUT33C through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4836EUT33C 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 MAX4836EUT33C reliable?
The price and inventory of MAX4836EUT33C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4836EUT33C is usually 5 days.
3.What payment methods are accepted for MAX4836EUT33C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4836EUT33C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4836EUT33C?
MAX4836EUT33C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4836EUT33C 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 MAX4836EUT33C?
For technical support, including MAX4836EUT33C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4836EUT33C requirements.
6.How does Aetrix verify that MAX4836EUT33C is sourced from the original manufacturer or authorized distributors?
All MAX4836EUT33C 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 MAX4836EUT33C meets industry standards.
7.What is the process for return or replacement of MAX4836EUT33C?
All MAX4836EUT33C units undergo pre-shipment inspection (PSI). If there is an issue with MAX4836EUT33C, 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 MAX4836EUT33C part is unused and in its original packaging.
Return procedure for MAX4836EUT33C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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