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Analog Devices Inc./Maxim Integrated MAX4833EUT33BD3
- Part No.:
- MAX4833EUT33BD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX4833EUT33BD3.pdf
- Description:
- IC REG LINEAR LDO 100MA
- Quantity:
- Payment:
- Shipping:
Inventory:1,069
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Product details
Overview
MAX4833EUT33BD3 from Maxim Integrated is a 100mA, 3.3V fixed-output LDO linear regulator with integrated push-pull RESET output, 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 port power management for fault detection and system reset coordination.
For engineers reviewing the MAX4833EUT33BD3 datasheet, MAX4833EUT33BD3 pinout, MAX4833EUT33BD3 application, or MAX4833EUT33BD3 equivalent, key selection considerations include its 3.3V preset output, D3 reset timeout (225ms), SOT23-6 package, active-low push-pull RESET behavior, and shutdown discharge capability via internal 900Ω resistor.
Technical Context
The MAX4833EUT33BD3 implements a BiCMOS-based LDO architecture with an internal PMOS pass transistor, precision bandgap reference, and error amplifier. Its RESET function asserts low when VOUT drops below 0.875 × VOUT (i.e., 2.92V for 3.3V output), with a guaranteed 225ms timeout after fault clearance.
Soft-start is externally programmable via capacitor on SS pin (tSS ≈ CSS in nF), and reverse-current protection ensures IN leakage remains ≤2µA when VOUT ≥ VIN. Thermal shutdown activates at +165°C with 15°C hysteresis, and dropout voltage is 130mV at 100mA load.
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. |
| Load Current | Guaranteed 100mA continuous output; supports SDIO/USB peripheral power with margin for transient peaks. |
| RESET Timeout | D3 option = 225ms; ensures reliable system reset hold time after brownout recovery, preventing premature MCU wake-up. |
| Quiescent Current | 90µA typical at full load; minimizes standby power in battery-backed portable systems like GPS modules. |
| Dropout Voltage | 130mV at 100mA; allows operation with only 3.43V input to sustain 3.3V output, critical for single-cell Li-ion or coin-cell applications. |
| Shutdown Current | 0.1µA max; enables ultra-low-power sleep modes in PDAs and notebook standby circuits. |
| Input Range | 2.5V to 5.5V; compatible with wide-input sources including USB 5V, 3.3V rails, and regulated 2.8V supplies. |
Pinout & Package
MAX4833EUT33BD3 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 | Power input | Accepts 2.5V–5.5V supply; requires 0.1µF ceramic bypass capacitor placed adjacent to pin for stability. |
| 2 - GND | Ground reference | Common return path for all internal circuits; connects to PCB ground plane for thermal and noise control. |
| 3 - SHDN | Active-low enable | Pulled high to enable; driven low to enter 0.1µA shutdown with automatic OUT discharge through 900Ω internal resistor. |
| 4 - RESET | Push-pull reset output | Asserts low during VOUT undervoltage, VIN UVLO, thermal shutdown, or SHDN assertion; holds low for 225ms after fault clears. |
| 5 - SS | Soft-start timing control | Capacitor-to-GND sets ramp time (e.g., 0.1µF → 100ms); prevents false resets during power-up inrush. |
| 6 - OUT | Regulated output | Delivers stable 3.3V; requires ≥3.3µF ceramic capacitor with ESR <0.2Ω for loop stability across temperature and load. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable soft-start | Capacitor-controlled rise time (1ms minimum fixed, up to 150ms) eliminates false RESET assertions during startup transients. |
| Push-pull RESET output | Active-low, rail-to-rail drive (0.4V low, 0.8×VOUT high) interfaces directly with µC reset inputs without pull-up resistors. |
| Shutdown output discharge | Internal 900Ω resistor discharges OUT to GND in shutdown, preventing back-powering of downstream circuitry. |
| Reverse-current protection | Blocks >99.9% of reverse current (≤2µA) when VOUT > VIN, protecting upstream sources like batteries or USB ports. |
| Accurate current limit | 115–135mA threshold ensures consistent overload handling across temperature, enabling predictable fault response in USB devices. |
Applications
| USB Host Port Power Management | SDIO Card Slot Regulation |
|---|---|
Use Scenario: Regulating and monitoring 3.3V power to USB peripherals in notebook computers during hot-plug events. IC Role / Device Role / Timing Role: LDO regulator with integrated RESET generator; provides clean 3.3V and asserts reset if VOUT sags due to overcurrent or input droop. Use Value: Prevents USB controller lockup by ensuring host-side reset assertion within 35µs of VOUT drop below 2.92V, with 225ms hold time for safe firmware recovery. |
Use Scenario: Supplying stable 3.3V to SDIO memory cards in GPS receivers where intermittent antenna loading causes output fluctuations. IC Role / Device Role / Timing Role: Fixed-output LDO with reverse-current blocking; maintains regulation during card insertion/removal and prevents backfeed into main power rail. Use Value: Enables hot-swap compliance by limiting reverse current to ≤2µA and guaranteeing 100mA peak delivery during card initialization bursts. |
| Notebook Subsystem Standby Rail | Cell Phone Baseband Core Supply |
Use Scenario: Generating always-on 3.3V for real-time clock and wake-up logic in notebook lid-open detection circuits. IC Role / Device Role / Timing Role: Ultra-low-IQ LDO (90µA active, 0.1µA shutdown) with soft-start; powers auxiliary domain while minimizing battery drain. Use Value: Extends battery life by reducing quiescent draw by >99% in shutdown, with controlled 100ms ramp to avoid RTC register corruption during wake. |
Use Scenario: Delivering 3.3V to baseband processor I/O banks during cellular transmission bursts that cause dynamic load swings. IC Role / Device Role / Timing Role: Low-dropout regulator with 130mV dropout and 70µVRMS noise; sustains voltage under 100mA step loads with minimal AC ripple. Use Value: Maintains signal integrity in RF sections by limiting output noise to 70µVRMS (10Hz–100kHz) and supporting fast load-transient recovery (<100µs). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-RESET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4833ETT33D3-T | TDFN-6 package (3mm × 3mm), same electrical specs, enhanced thermal performance (1951mW dissipation vs. 727mW in SOT23). | Better suited for thermally constrained layouts or higher ambient temperatures (>70°C). | Select when board space allows TDFN and junction temperature must stay below 125°C under sustained 100mA load. |
| MAX4836EUT33BD3 | Pin-compatible 500mA version; identical pinout, RESET function, and soft-start architecture but higher current capability. | Required for applications with >100mA peak loads (e.g., multi-lane SDIO, high-speed USB hubs). | Choose when future-proofing for higher load margins or when downstream capacitance exceeds 10µF, demanding greater charge current. |
Compared with MAX4833EUT33BD3, the TDFN alternative improves thermal headroom without changing layout or firmware, while the 500mA variant retains full functional compatibility but enables higher-power subsystems without redesigning the reset coordination logic.
Availability
MAX4833EUT33BD3 is available at Aetrix Electronics and suitable for USB ports, SDIO devices, and notebook subsystems requiring stable component supply, precise reset timing, and ultra-low quiescent current in compact SOT23 packaging.
Supply support for MAX4833EUT33BD3 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 portable electronics.
The MAX4832/MAX4833 product line targets space-constrained, low-power systems needing integrated current-limiting LDOs with intelligent fault signaling-specifically for USB, SDIO, and mobile device power rails where reliability and reset coordination are critical.
FAQ
What is the exact RESET threshold voltage for MAX4833EUT33BD3?
The RESET threshold for MAX4833EUT33BD3 is 0.875 × nominal output voltage, i.e., 2.92V (87.5% of 3.3V). This value is guaranteed across –40°C to +85°C and has ±2.5% tolerance, meaning the actual trip point falls between 2.85V and 2.99V under all operating conditions.
Does MAX4833EUT33BD3 require an external capacitor on the SS pin?
No, MAX4833EUT33BD3 includes a fixed 1ms minimum soft-start time even with SS floating. However, connecting a capacitor (e.g., 0.01µF for 10ms or 0.1µF for 100ms) is recommended to prevent false RESET assertions during high-inrush startup in USB or SDIO applications.
How does the shutdown discharge feature work in MAX4833EUT33BD3?
In MAX4833EUT33BD3, pulling SHDN low activates an internal 900Ω resistor between OUT and GND, discharging the output capacitor. This prevents back-powering of upstream circuitry and ensures clean power-down sequencing in systems like notebook sleep/wake transitions.
Can MAX4833EUT33BD3 be used with input voltages below 2.5V?
No-MAX4833EUT33BD3 has a specified 2.5V to 5.5V input range. Operation below 2.5V violates absolute maximum ratings and may cause undefined behavior, including failure to regulate or assert RESET. Input undervoltage lockout triggers at ~2.125V (typical), disabling regulation before damage occurs.
Is MAX4833EUT33BD3 RoHS-compliant and lead-free?
MAX4833EUT33BD3 is not RoHS/lead-free per the official Maxim ordering table; it carries "RoHS/Lead-Free: No" designation. For lead-free alternatives, consult Maxim's updated part numbering (e.g., suffix "+") or contact Aetrix Electronics for qualified drop-in replacements meeting current environmental standards.
MAX4833EUT33BD3 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):
- 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:
- SOT-23-6
MAX4833EUT33BD3 FAQ
1.How can I place an order for MAX4833EUT33BD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4833EUT33BD3 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 MAX4833EUT33BD3 reliable?
The price and inventory of MAX4833EUT33BD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4833EUT33BD3 is usually 5 days.
3.What payment methods are accepted for MAX4833EUT33BD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4833EUT33BD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4833EUT33BD3?
MAX4833EUT33BD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4833EUT33BD3 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 MAX4833EUT33BD3?
For technical support, including MAX4833EUT33BD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4833EUT33BD3 requirements.
6.How does Aetrix verify that MAX4833EUT33BD3 is sourced from the original manufacturer or authorized distributors?
All MAX4833EUT33BD3 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 MAX4833EUT33BD3 meets industry standards.
7.What is the process for return or replacement of MAX4833EUT33BD3?
All MAX4833EUT33BD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX4833EUT33BD3, 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 MAX4833EUT33BD3 part is unused and in its original packaging.
Return procedure for MAX4833EUT33BD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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