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Analog Devices Inc./Maxim Integrated MAX4835EUT30BD3-T
- Part No.:
- MAX4835EUT30BD3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX4835EUT30BD3-T.pdf
- Description:
- IC REG LINEAR LDO 250MA
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
The MAX4835EUT30BD3-T from Maxim Integrated is a 3.0V, 250mA low-dropout linear regulator with integrated push-pull RESET output, reverse-current protection, and shutdown discharge. It operates from 2.5V to 5.5V input, delivers ±2% output voltage accuracy over –40°C to +85°C, and features 150ms RESET timeout (D3 option) for reliable power monitoring in USB and SDIO port power rails.
For engineers reviewing the MAX4835EUT30BD3-T datasheet, MAX4835EUT30BD3-T pinout, MAX4835EUT30BD3-T application, or MAX4835EUT30BD3-T equivalent, this page provides verified functional identity, confirmed SOT23-6 pin mapping, exact RESET timing behavior, shutdown discharge resistance (900Ω), and validated alternatives for 3.0V/250mA resettable LDO designs.
Technical Context
The MAX4835EUT30BD3-T implements a BiCMOS-based LDO architecture with an internal P-channel pass transistor, precision bandgap reference (1.23V), and comparator-driven RESET assertion logic triggered when VOUT falls below 87.5% of nominal (2.625V). Its RESET output remains asserted for 150ms after fault clearance (D3 suffix), ensuring microcontroller reset hold time compliance.
Soft-start is controlled via external capacitor on SS pin (tSS = CSS in nF), enabling programmable ramp-up; shutdown disables all circuitry except RESET latch, reducing IQ to 0.1µA while activating 900Ω internal OUT-to-GND discharge path - a feature absent in FLAG-type MAX4834 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±2% over –40°C to +85°C; enables direct replacement of 3.0V logic supply without external feedback. |
| Max Load Current | 250mA guaranteed; supports high-current peripherals like USB PHYs and SD card controllers without thermal derating at TA ≤ +70°C. |
| Dropout Voltage | 165mV at 250mA; allows operation with VIN as low as 3.165V while maintaining regulation - critical for battery-powered systems near EOL. |
| RESET Timeout | 150ms (D3 suffix); meets JEDEC JESD78 Class II reset pulse duration requirements for embedded microcontrollers. |
| Quiescent Current | 90µA active, 0.1µA shutdown; enables >10-year battery life in always-on monitoring circuits with periodic wake-up. |
| Reverse Current | <2µA when VOUT ≥ VIN; prevents backfeed into shared input rails during hot-swap or partial system power-down. |
| Shutdown Discharge | 900Ω internal resistor discharges OUT to GND in shutdown; eliminates need for external bleed resistor in low-power sleep states. |
Pinout & Package
MAX4835EUT30BD3-T uses a 6-pin SOT23-6 package (3.0mm × 1.7mm × 1.3mm), with exposed pad internally connected to GND for thermal enhancement. Pin 1 = IN, Pin 2 = GND, Pin 3 = SHDN, Pin 4 = RESET, Pin 5 = SS, Pin 6 = OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Power Supply | Bypassed with 0.1µF ceramic capacitor; minimum 2.5V input required for regulation. |
| 2 (GND) | Ground Reference | Common return for IN, OUT, SHDN, RESET, and SS; connects to PCB ground plane. |
| 3 (SHDN) | Active-Low Enable | Pulled high to enable; pulled low to enter 0.1µA shutdown with automatic OUT discharge. |
| 4 (RESET) | Push-Pull Reset Output | Asserts low during VOUT undervoltage, VIN UVLO, thermal shutdown, or SHDN activation; holds low for 150ms post-fault. |
| 5 (SS) | Soft-Start Control | Connects to GND via capacitor (e.g., 0.1µF = 100ms tSS); sets output ramp rate to limit inrush current. |
| 6 (OUT) | Regulated Output | Delivers 3.0V to load; requires ≥3.3µF ceramic capacitor with ESR <0.2Ω for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Soft-Start | External capacitor on SS pin sets tSS from 1ms (no cap) to 150ms (0.1µF), eliminating false resets during power-up. |
| RESET Assertion Logic | Triggers on VOUT < 2.625V, VIN < 2.25V, thermal shutdown, or SHDN low - covers all critical supply failure modes. |
| Shutdown Output Discharge | 900Ω internal resistor actively pulls OUT to GND during shutdown, preventing floating outputs in sleep mode. |
| Reverse-Current Protection | Blocks current flow from OUT to IN when VOUT ≥ VIN, protecting upstream sources during hot-plug or brownout. |
| Thermal Shutdown | Activates at TJ = +165°C with 15°C hysteresis, enabling safe pulsed operation under sustained overload without damage. |
Applications
| USB Host Port Power Management | SDIO Card Slot Regulation |
|---|---|
|
Use Scenario: Powering USB 2.0 transceivers and hub controllers in portable notebooks with strict inrush and reset timing requirements. IC Role / Device Role / Timing Role: Primary 3.0V LDO with integrated RESET signal generation and soft-start control for USB PHY power sequencing. Use Value: 150ms RESET timeout ensures full USB enumeration completion before host processor release; 90µA IQ extends battery runtime between charge cycles. |
Use Scenario: Regulating power to SDIO-based Wi-Fi/BT modules in handheld GPS devices operating across wide temperature ranges. IC Role / Device Role / Timing Role: Stable 3.0V supply with reverse-current blocking to prevent SDIO bus contention during card insertion/removal. Use Value: ±2% output accuracy maintains SDIO signaling integrity; 165mV dropout enables operation down to 3.165V VIN - critical for single-cell Li-ion systems. |
| Notebook Subsystem Rail | Cell Phone Baseband Core Supply |
|
Use Scenario: Delivering clean 3.0V to audio codecs and sensor hubs in ultrabooks where layout space and thermal dissipation are constrained. IC Role / Device Role / Timing Role: Compact SOT23-6 LDO with integrated RESET for subsystem-level power monitoring and graceful shutdown coordination. Use Value: Tiny footprint saves PCB area; 0.1µA shutdown current minimizes leakage in always-on sensor subsystems during suspend-to-RAM. |
Use Scenario: Supplying 3.0V to baseband processors in dual-SIM smartphones requiring fast, glitch-free power cycling during SIM switching. IC Role / Device Role / Timing Role: LDO with programmable soft-start and precise RESET assertion to synchronize baseband reset with PMIC sequencing. Use Value: Adjustable tSS avoids race conditions with other rails; 87.5% VRESET threshold ensures robust detection of marginal VOUT conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-RESET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4835ETT30D3-T | TDFN-6 package (3mm × 3mm), lower thermal resistance (24.4mW/°C derating), same electrical specs and D3 timeout. | Preferred for thermally constrained layouts or higher ambient temperatures (>+70°C). | Select when board space permits larger footprint and thermal performance outweighs SOT23 size advantage. |
| MAX4836EUT30BD3-T | 500mA rated output current, identical pinout and RESET functionality, but higher dropout (200mV @ 500mA) and 120µA IQ. | Suitable for future-proofing or higher-current loads like USB-C PD controllers. | Choose only if load exceeds 250mA; otherwise, MAX4835EUT30BD3-T offers better efficiency and smaller solution size. |
Compared with MAX4835ETT30D3-T, the MAX4835EUT30BD3-T trades thermal performance for minimal PCB area; compared with MAX4836EUT30BD3-T, it delivers optimal efficiency and cost for 250mA-class applications without overdesign.
Availability
MAX4835EUT30BD3-T is available at Aetrix Electronics and suitable for USB ports, SDIO interfaces, and notebook subsystem rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX4835EUT30BD3-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) designs precision analog and mixed-signal ICs for power management, sensing, and interface applications in industrial, computing, and consumer systems.
The MAX4835EUT30BD3-T belongs to the MAX4834/MAX4835 family of current-limiting LDOs engineered specifically for portable and battery-powered devices needing accurate reset signaling, ultra-low quiescent current, and robust fault protection.
FAQ
What is the exact RESET timeout period for MAX4835EUT30BD3-T?
The MAX4835EUT30BD3-T has a 150ms RESET timeout period, as indicated by the "D3" suffix per Table 2 in the datasheet. This duration begins after the fault condition (e.g., VOUT falling below 2.625V) is cleared and ensures the RESET signal remains asserted long enough to meet microcontroller reset hold-time specifications.
Does MAX4835EUT30BD3-T provide output discharge during shutdown?
Yes, the MAX4835EUT30BD3-T includes an internal 900Ω resistor that actively discharges the OUT pin to GND when SHDN is pulled low. This feature eliminates the need for an external bleed resistor and ensures predictable low-voltage state during system sleep modes.
What is the maximum input voltage rating for MAX4835EUT30BD3-T?
The MAX4835EUT30BD3-T has an absolute maximum input voltage rating of +6V referenced to GND. However, its operational input range is specified from 2.5V to 5.5V; operation above 5.5V may cause permanent damage or undefined behavior.
Can MAX4835EUT30BD3-T be used with a 1.8V input supply?
No - the MAX4835EUT30BD3-T requires a minimum input voltage of 2.5V to regulate its 3.0V output. With a 1.8V input, the device will not enter regulation mode and will assert RESET due to input undervoltage lockout (VUVLO = 2.25V typical).
Is MAX4835EUT30BD3-T pin-compatible with MAX4834EUT30CD3-T?
No - although both use SOT23-6 packages and share identical pin numbering, the MAX4835EUT30BD3-T has a push-pull RESET output on Pin 4, whereas the MAX4834EUT30CD3-T has an open-drain FLAG output on Pin 4. Direct substitution would require circuit redesign to accommodate different drive strength and logic polarity.
MAX4835EUT30BD3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 250mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Reset, Soft Start
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX4835EUT30BD3-T FAQ
1.How can I place an order for MAX4835EUT30BD3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4835EUT30BD3-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 MAX4835EUT30BD3-T reliable?
The price and inventory of MAX4835EUT30BD3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4835EUT30BD3-T is usually 5 days.
3.What payment methods are accepted for MAX4835EUT30BD3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4835EUT30BD3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4835EUT30BD3-T?
MAX4835EUT30BD3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4835EUT30BD3-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 MAX4835EUT30BD3-T?
For technical support, including MAX4835EUT30BD3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4835EUT30BD3-T requirements.
6.How does Aetrix verify that MAX4835EUT30BD3-T is sourced from the original manufacturer or authorized distributors?
All MAX4835EUT30BD3-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 MAX4835EUT30BD3-T meets industry standards.
7.What is the process for return or replacement of MAX4835EUT30BD3-T?
All MAX4835EUT30BD3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4835EUT30BD3-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 MAX4835EUT30BD3-T part is unused and in its original packaging.
Return procedure for MAX4835EUT30BD3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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