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Analog Devices Inc./Maxim Integrated MAX4833ETT33BD3
- Part No.:
- MAX4833ETT33BD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX4833ETT33BD3.pdf
- Description:
- IC REG LINEAR LDO 100MA
- Quantity:
- Payment:
- Shipping:
Inventory:809
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Product details
Overview
The MAX4833ETT33BD3 from Maxim Integrated is a 3.3V, 100mA low-dropout linear regulator with integrated RESET function, reverse-current protection, and programmable soft-start. It operates from 2.5V to 5.5V input, delivers ±2% output voltage accuracy over –40°C to +85°C, and features 90µA quiescent current and 0.1µA shutdown current. It is used in USB ports and SDIO interfaces where precise reset signaling and low-power sequencing are required.
For engineers reviewing the MAX4833ETT33BD3 datasheet, MAX4833ETT33BD3 pinout, MAX4833ETT33BD3 application, or MAX4833ETT33BD3 equivalent, key selection criteria include its push-pull RESET output with 225ms timeout, 130mV dropout at 100mA, shutdown discharge via internal 900Ω resistor, and TDFN-6 package thermal performance for space-constrained portable designs.
Technical Context
The MAX4833ETT33BD3 integrates a PMOS pass transistor with accurate current limiting (115–135mA), thermal shutdown (+165°C), and undervoltage lockout (2.00–2.25V). Its RESET output asserts low on VOUT drop below 87.5% of nominal (2.8875V), VIN below UVLO, SHDN low, or thermal fault - remaining active for 225ms after condition clears.
Soft-start is controlled by an external capacitor on the SS pin (tSS = CSS in nF), enabling startup ramp control to prevent inrush; no capacitor yields ~1ms rise time. Reverse-current protection ensures IN leakage stays below 2µA when VOUT ≥ VIN, and shutdown discharges OUT through a verified 900Ω internal path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V fixed, ±2% accuracy across –40°C to +85°C ensures stable core logic supply without external feedback. |
| Max Load Current | 100mA guaranteed minimum supports microSD card power, USB peripheral rails, and low-power MCU I/O domains. |
| Dropout Voltage | 130mV at 100mA enables operation with only 3.43V input - critical for battery-powered systems near end-of-discharge. |
| RESET Timeout | 225ms (D3 option) provides robust glitch immunity while ensuring timely system recovery after brownout events. |
| Quiescent Current | 90µA typical in active mode minimizes standby drain in always-on USB/SDIO detection circuits. |
| Shutdown Current | 0.1µA enables multi-year battery life in maintenance-free portable devices during deep sleep states. |
| Input Range | 2.5V to 5.5V accommodates single-cell Li-ion (2.7–4.2V), USB 5V, and regulated 3.3V/5V system rails. |
Pinout & Package
MAX4833ETT33BD3 uses a 6-pin TDFN package (3mm × 3mm × 0.8mm) with exposed paddle thermally and electrically connected to GND. The package supports high thermal efficiency in compact layouts and requires PCB thermal pad connection to ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power Input | Accepts 2.5V–5.5V; requires 0.1µF ceramic bypass close to pin to suppress high-frequency noise and stabilize regulation. |
| 2 GND | Ground Reference | Common return for all internal circuits; must be tied to PCB ground plane and connected to exposed paddle. |
| 3 SHDN | Active-Low Enable | Pulled high (≥1.4V) for operation; pulled low (<0.5V) disables regulator and activates 900Ω OUT discharge path. |
| 4 RESET | Push-Pull Reset Output | Asserts low during VOUT < 2.8875V, UVLO, thermal shutdown, or SHDN low; holds low for 225ms post-fault clearance. |
| 5 SS | Soft-Start Control | Capacitor from SS to GND sets output ramp time (tSS ≈ CSS in nF); floating yields ~1ms startup. |
| 6 OUT | Regulated Output | Delivers 3.3V ±2%; requires ≥3.3µF ceramic capacitor with ESR <0.2Ω for stability under full 100mA load. |
Key Features
| Feature | Design Value |
|---|---|
| Push-Pull RESET Output | Eliminates need for external pull-up resistor and ensures fast, deterministic reset assertion in noisy environments. |
| Shutdown Output Discharge | 900Ω internal discharge path safely collapses 3.3V rail within milliseconds upon SHDN assertion - essential for sequenced power-down. |
| Reverse-Current Protection | Guarantees IN leakage ≤2µA when VOUT > VIN, preventing backfeed into shared input rails in multi-rail systems. |
| Adjustable Soft-Start | External capacitor on SS pin allows precise control of output ramp rate to avoid false resets during power-up transients. |
| Thermal Shutdown with Hysteresis | +165°C trip with 15°C hysteresis enables safe, self-limiting operation under sustained overload without latch-off. |
Applications
| USB Host Port Power Management | SDIO Card Interface Supply |
|---|---|
|
Use Scenario: Powering USB peripherals (e.g., Bluetooth modules, HID devices) from a 5V bus with strict inrush and reset timing requirements. IC Role / Device Role / Timing Role: LDO regulator with RESET signaling to notify host controller of VBUS brownout or overcurrent events. Use Value: 225ms RESET timeout prevents spurious reinitialization during brief cable disconnects while ensuring reliable fault recovery. |
Use Scenario: Providing clean, sequenced 3.3V supply to microSD or eMMC cards in handheld GPS units and PDAs. IC Role / Device Role / Timing Role: Primary power rail with soft-start and RESET to coordinate card initialization and prevent data corruption during power transitions. Use Value: 90µA quiescent current extends battery runtime during card idle states; shutdown discharge avoids residual voltage causing card latch-up. |
| Notebook Subsystem Rail | Cell Phone Baseband Core Supply |
|
Use Scenario: Delivering regulated 3.3V to embedded controllers, touch controllers, or sensor hubs in ultraportable notebooks. IC Role / Device Role / Timing Role: Low-noise, low-IQ LDO with RESET to synchronize subsystem wake-up and ensure valid voltage before firmware execution. Use Value: ±2% output accuracy maintains timing margin for 3.3V-tolerant logic; 130mV dropout sustains regulation down to 3.43V input during battery sag. |
Use Scenario: Powering baseband processor I/O banks or RF front-end bias rails in dual-SIM smartphones with tight thermal constraints. IC Role / Device Role / Timing Role: Compact TDFN-6 regulator with thermal shutdown and reverse-current protection for shared battery rail integrity. Use Value: Exposed paddle enables efficient heat dissipation in thin form factors; 0.1µA shutdown current meets stringent LTE/5G standby leakage budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO with RESET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4833EUT33BD3 | SOT23-6 package (3.0mm × 1.7mm vs. TDFN's 3.0mm × 3.0mm); same electrical specs, identical RESET timeout and output voltage. | Lower thermal resistance in TDFN makes MAX4833ETT33BD3 preferred for continuous 100mA loads; SOT23 suits lower-power or legacy board layouts. | Select MAX4833ETT33BD3 when PCB space allows and thermal performance is critical; choose MAX4833EUT33BD3 for compatibility with existing SOT23 footprints. |
| MAX4836ETT33BD3 | 500mA rated output (vs. 100mA); same pinout, package, RESET functionality, and 3.3V output; higher dropout (180mV @500mA). | Supports higher-current peripherals (e.g., USB 2.0 PHY, Wi-Fi SoCs); requires larger input capacitance and thermal management due to higher power dissipation. | Choose MAX4833ETT33BD3 for cost-sensitive, low-power SDIO/USB applications; upgrade to MAX4836ETT33BD3 only if load exceeds 100mA or future-proofing is required. |
Compared with MAX4833EUT33BD3, the MAX4833ETT33BD3 offers superior thermal performance in the same footprint area but requires exposed-pad soldering; versus MAX4836ETT33BD3, it trades current capacity for lower dropout and reduced thermal stress in 100mA-class applications.
Availability
MAX4833ETT33BD3 is available at Aetrix Electronics and suitable for USB ports, SDIO interfaces, and notebook subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX4833ETT33BD3 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, automotive, and consumer systems.
The MAX4832/MAX4833 product line targets portable and battery-powered electronics requiring ultra-low IQ, accurate current limiting, and intelligent fault signaling - specifically engineered for SDIO, USB, and mobile baseband power rails.
FAQ
What is the RESET timeout period for MAX4833ETT33BD3?
The MAX4833ETT33BD3 has a RESET timeout period of 225ms (D3 option), meaning the RESET pin remains asserted low for 225ms after the fault condition (e.g., VOUT drop, UVLO, thermal shutdown) is cleared. This value is factory-programmed and non-adjustable; it ensures sufficient hold time for system-level reset sequencing without false triggers from transient glitches.
Does MAX4833ETT33BD3 provide output discharge during shutdown?
Yes, the MAX4833ETT33BD3 includes internal shutdown output discharge via a 900Ω resistor between OUT and GND. When SHDN is pulled low, this path actively discharges the 3.3V output capacitor, collapsing the rail rapidly - a critical feature for safe power-down sequencing in multi-rail systems and preventing latch-up in downstream logic.
What is the maximum input voltage rating for MAX4833ETT33BD3?
The absolute maximum input voltage for MAX4833ETT33BD3 is +6V on the IN pin relative to GND. However, the recommended operating range is 2.5V to 5.5V. Operation above 5.5V risks permanent damage, and the device incorporates input undervoltage lockout (UVLO) that disables regulation below 2.00–2.25V to prevent unstable startup behavior.
Can MAX4833ETT33BD3 be used with a 1.8V input supply?
No - MAX4833ETT33BD3 requires a minimum input voltage of 2.5V to regulate its 3.3V output. At 1.8V input, the device remains in UVLO state and will not produce any output. For 1.8V-compatible LDOs, consider alternatives such as the MAX8526 series or other sub-2.5V-input regulators explicitly rated for that range.
What package type does MAX4833ETT33BD3 use, and how is thermal performance optimized?
MAX4833ETT33BD3 uses a 6-pin TDFN package (3mm × 3mm × 0.8mm) with an exposed paddle internally connected to GND. To optimize thermal performance, the exposed paddle must be soldered to a dedicated PCB copper pour tied to the system ground plane - this reduces junction-to-board thermal resistance to ~24.4°C/W and enables reliable 100mA operation at +85°C ambient.
MAX4833ETT33BD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.13V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Reset, Soft Start
- Protection Features:
- Over Current, Over Temperature, Reverse Current, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TDFN-EP (3x3)
MAX4833ETT33BD3 FAQ
1.How can I place an order for MAX4833ETT33BD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4833ETT33BD3 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 MAX4833ETT33BD3 reliable?
The price and inventory of MAX4833ETT33BD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4833ETT33BD3 is usually 5 days.
3.What payment methods are accepted for MAX4833ETT33BD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4833ETT33BD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4833ETT33BD3?
MAX4833ETT33BD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4833ETT33BD3 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 MAX4833ETT33BD3?
For technical support, including MAX4833ETT33BD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4833ETT33BD3 requirements.
6.How does Aetrix verify that MAX4833ETT33BD3 is sourced from the original manufacturer or authorized distributors?
All MAX4833ETT33BD3 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 MAX4833ETT33BD3 meets industry standards.
7.What is the process for return or replacement of MAX4833ETT33BD3?
All MAX4833ETT33BD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX4833ETT33BD3, 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 MAX4833ETT33BD3 part is unused and in its original packaging.
Return procedure for MAX4833ETT33BD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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