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Analog Devices Inc./Maxim Integrated MAX4836EUT28C
- Part No.:
- MAX4836EUT28C
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX4836EUT28C.pdf
- Description:
- 500MA, LDO LINEAR REGULATOR WITH
- Quantity:
- Payment:
- Shipping:
Inventory:1,845
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Product details
Overview
MAX4836EUT28C from Maxim Integrated is a 500mA low-dropout linear regulator with integrated current-limiting switch and FLAG output, delivering a preset 2.8V output from 2.5V–5.5V input. It features 90µA quiescent current, 330mV dropout at full load, reverse-current protection, and thermal shutdown. Used in USB ports and notebook computers for reliable power rail supervision and overcurrent fault signaling.
For engineers reviewing the MAX4836EUT28C datasheet, MAX4836EUT28C pinout, MAX4836EUT28C application, or MAX4836EUT28C equivalent, this page provides verified technical context, package-specific pin functions, real-world application mappings, and validated alternative parts for system-level power management design.
Technical Context
The MAX4836EUT28C 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 an open-drain low signal after sustained overcurrent exceeding 540–660mA for >5–17ms (blanking time), latching off the pass transistor until IN or SHDN is cycled.
Soft-start is programmable via external capacitor on SS pin (1ms minimum fixed ramp), and shutdown reduces supply current to 0.1µA while enabling output discharge only in MAX4837 variants. Reverse-current protection ensures <2µA leakage when VOUT ≥ VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±2% over -40°C to +85°C; enables direct replacement of 2.8V logic rails without external feedback. |
| Load Current | Guaranteed 500mA continuous; supports high-current peripherals like SDIO card interfaces and USB transceivers. |
| Dropout Voltage | 330mV at 500mA; allows operation with VIN as low as 3.13V while maintaining regulated 2.8V output. |
| Quiescent Current | 90µA typical at full load; minimizes standby power loss in battery-powered portable systems. |
| Shutdown Current | 0.1µA maximum; critical for ultra-low-power sleep modes in GPS and PDA applications. |
| Current Limit | 540–660mA threshold; protects downstream circuitry during short-circuit or overload without external sensing. |
| FLAG Blanking Time | 5–17ms; prevents false triggering during startup inrush or transient load spikes. |
Pinout & Package
MAX4836EUT28C is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA) with exposed pad internally connected to GND. The package measures 2.9mm × 2.8mm × 1.3mm and supports reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input Power Supply | Bypassed with 0.1µF ceramic capacitor; accepts 2.5V–5.5V input; reverse-current protected. |
| 2 GND | Ground Reference | Primary return path for all internal circuits; connects to exposed pad for thermal conduction. |
| 3 SHDN | Active-Low Shutdown Control | Pulled high to enable; driven low to reduce IQ to 0.1µA and disable output regulation. |
| 4 FLAG | Open-Drain Overcurrent Indicator | Asserts low when load exceeds current limit for >blanking time; requires external pull-up for logic interface. |
| 5 SS | Soft-Start Timing Control | Capacitor-to-GND sets output ramp time (tSS = CSS in nF); floating yields ~1ms rise time. |
| 6 OUT | Regulated Output | Delivers 2.8V ±2%; requires ≥3.3µF ceramic capacitor with ESR <0.2Ω for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Accurate current limiting | 540–660mA threshold with ±10% tolerance ensures predictable fault response across temperature. |
| FLAG latch-off behavior | Latches pass transistor off during sustained overcurrent, requiring IN/SHDN toggle to reset-prevents repeated fault cycling. |
| Reverse-current protection | Guarantees <2µA reverse leakage when VOUT ≥ VIN, eliminating need for external blocking diode. |
| Thermal shutdown with hysteresis | Triggers at +165°C junction temperature and resets at +150°C, enabling safe pulsed operation under overload. |
| Ultra-low shutdown current | 0.1µA max enables multi-year battery life in always-on portable devices like GPS receivers. |
Applications
| USB Host Port Power Management | SDIO Card Interface Regulation |
|---|---|
|
Use Scenario: Regulating and supervising 2.8V supply for USB OTG host controllers and PHYs in portable devices. IC Role / Device Role / Timing Role: LDO regulator with overcurrent flag signaling to MCU for port disable upon cable short or device fault. Use Value: Prevents bus-wide failure by isolating faulty peripherals using latched FLAG output and reverse-current blocking. |
Use Scenario: Providing stable 2.8V rail to SDIO memory cards and wireless modules in smartphones and PDAs. IC Role / Device Role / Timing Role: Primary voltage regulator with soft-start to avoid SDIO initialization glitches during hot-plug events. Use Value: Ensures clean power-up sequence and eliminates false card-detect errors caused by inrush current. |
| Notebook System I/O Rail | GPS Receiver Baseband Power |
|
Use Scenario: Powering 2.8V I/O buffers and level shifters in notebook southbridge subsystems. IC Role / Device Role / Timing Role: Low-noise (70µVRMS), high-PSRR regulator protecting sensitive analog/digital interfaces from supply noise. Use Value: Maintains signal integrity in high-speed I/O paths by rejecting switching noise from adjacent DC/DC converters. |
Use Scenario: Delivering 2.8V to GPS baseband ICs requiring ultra-low quiescent current during satellite acquisition. IC Role / Device Role / Timing Role: Always-on LDO with 0.1µA shutdown mode enabling rapid wake-from-sleep without boot delay. Use Value: Extends battery runtime in handheld GPS units by minimizing idle power while preserving fast restart capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator with overcurrent flag applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4836ETT28C | TDFN-6 (3mm × 3mm) vs. SOT23-6; identical electrical specs; lower thermal resistance (24.4mW/°C derating). | Better suited for thermally constrained PCB layouts; requires exposed pad soldering to GND plane. | Select when board space permits smaller footprint and thermal performance is critical. |
| MAX4834ETT28C | 250mA rated output; same 2.8V preset, FLAG function, and 90µA IQ-but lower current limit (320–400mA). | Applicable where peak load stays below 250mA; not suitable for USB/SDIO full-speed operation. | Choose for cost-sensitive, lower-power applications where 500mA headroom is unnecessary. |
Compared with MAX4836EUT28C, MAX4836ETT28C offers superior thermal dissipation in compact layouts, while MAX4834ETT28C trades current capacity for reduced silicon area and cost-both retain identical 2.8V regulation and FLAG signaling behavior.
Availability
MAX4836EUT28C is available at Aetrix Electronics and suitable for USB ports, SDIO interfaces, and notebook I/O rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX4836EUT28C 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 and mixed-signal ICs for power management, data conversion, and interface applications.
The MAX4836 family targets portable and battery-powered systems needing accurate, low-quiescent-current LDOs with integrated fault detection-specifically for USB, SDIO, and GPS subsystems demanding robust overcurrent protection.
FAQ
What output voltage does the MAX4836EUT28C deliver?
The MAX4836EUT28C delivers a factory-preset 2.8V output with ±2% accuracy across -40°C to +85°C. This fixed voltage eliminates external resistor networks and simplifies layout for 2.8V logic rails in portable electronics. The "28" suffix explicitly denotes the 2.8V option per Maxim's naming convention in Table 1.
How does the FLAG output of the MAX4836EUT28C behave during overcurrent?
The MAX4836EUT28C FLAG output is an open-drain signal that asserts low when load current exceeds 540–660mA for longer than the blanking time (5–17ms). Once asserted, the internal pass transistor latches off until IN or SHDN is toggled. This behavior prevents repeated tripping during sustained faults and requires external pull-up for MCU interfacing.
Does the MAX4836EUT28C provide reverse-current protection?
Yes, the MAX4836EUT28C guarantees reverse-current protection: when VOUT ≥ VIN, reverse leakage at IN is limited to ≤2µA. This eliminates the need for an external blocking diode in back-powered scenarios-such as when a USB peripheral drives the host port-reducing BOM count and forward voltage drop.
What is the minimum recommended output capacitor for stable operation of the MAX4836EUT28C?
The MAX4836EUT28C requires a minimum 3.3µF ceramic output capacitor with ESR <0.2Ω for stable operation across -40°C to +85°C and up to 500mA load. X7R dielectric capacitors are recommended for consistent performance; larger values (e.g., 10µF) improve PSRR and transient response without compromising stability.
Can the MAX4836EUT28C be used in place of the MAX4837 series?
No-the MAX4836EUT28C and MAX4837 series are functionally distinct: MAX4836 provides FLAG (overcurrent indicator), while MAX4837 provides RESET (output undervoltage indicator). They share pinout and package but differ in output function, timing behavior, and internal circuitry; substituting one for the other requires redesigning the fault-handling logic in the host system.
MAX4836EUT28C 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:
- -
MAX4836EUT28C FAQ
1.How can I place an order for MAX4836EUT28C through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4836EUT28C 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 MAX4836EUT28C reliable?
The price and inventory of MAX4836EUT28C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4836EUT28C is usually 5 days.
3.What payment methods are accepted for MAX4836EUT28C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4836EUT28C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4836EUT28C?
MAX4836EUT28C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4836EUT28C 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 MAX4836EUT28C?
For technical support, including MAX4836EUT28C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4836EUT28C requirements.
6.How does Aetrix verify that MAX4836EUT28C is sourced from the original manufacturer or authorized distributors?
All MAX4836EUT28C 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 MAX4836EUT28C meets industry standards.
7.What is the process for return or replacement of MAX4836EUT28C?
All MAX4836EUT28C units undergo pre-shipment inspection (PSI). If there is an issue with MAX4836EUT28C, 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 MAX4836EUT28C part is unused and in its original packaging.
Return procedure for MAX4836EUT28C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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