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Analog Devices Inc./Maxim Integrated MAX4834ETT33C
- Part No.:
- MAX4834ETT33C
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX4834ETT33C.pdf
- Description:
- IC REG LINEAR 250MA LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,236
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Product details
Overview
MAX4834ETT33C from Maxim Integrated is a 3.3V, 250mA 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 - used in USB port power management where fault signaling and compact size are critical.
For engineers reviewing the MAX4834ETT33C datasheet, MAX4834ETT33C pinout, MAX4834ETT33C application, or MAX4834ETT33C equivalent, key selection criteria include its 3.3V fixed output, FLAG-based overload notification (not RESET), TDFN-6 package footprint, soft-start programmability via external capacitor, and guaranteed 270–330mA current limit at VOUT = 0V.
Technical Context
The MAX4834ETT33C implements a BiCMOS-based LDO architecture with an internal PMOS pass transistor, enabling low dropout (165mV at 250mA) and reverse-current blocking. Its FLAG function asserts low after sustained overcurrent exceeding the blanking time (5–17ms), latching off the pass device until IN or SHDN is cycled.
Soft-start is controlled by an external capacitor on the SS pin, yielding programmable ramp times (1ms minimum, up to 150ms with 0.1µF); the device guarantees ±2% output voltage accuracy across –40°C to +85°C and supports stable operation with 3.3µF ceramic output capacitors having ESR < 0.2Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V - eliminates external feedback network; compatible with standard logic I/O rails. |
| Max Load Current | 250mA - sufficient for powering USB peripherals, SDIO interfaces, or baseband processors without derating. |
| Dropout Voltage | 165mV at 250mA - enables regulation from 3.465V input, supporting single-cell Li-ion or regulated 3.6V supplies. |
| Quiescent Current | 90µA - minimizes standby power loss in battery-powered notebooks and GPS systems. |
| Current Limit | 270–330mA at VOUT = 0V - provides robust short-circuit protection while allowing brief inrush peaks above nominal load. |
| FLAG Blanking Time | 5–17ms - prevents false triggering during startup transients or momentary surges, ensuring reliable fault detection. |
| Shutdown Current | 0.1µA - enables deep-sleep modes in portable devices without significant battery drain. |
Pinout & Package
MAX4834ETT33C uses a 6-pin TDFN package (3mm × 3mm × 0.8mm) with exposed paddle thermally and electrically connected to GND. The package supports high-power-density PCB layouts and requires soldering the EP to a thermal pad for optimal junction-to-board thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power Input | Bypassed with 0.1µF ceramic capacitor; accepts 2.5V–5.5V supply; reverse-current protection disables conduction when VOUT > VIN. |
| 2 GND | Ground Reference | Common return for all internal circuits; EP (exposed paddle) is internally and externally tied to this node for thermal and electrical integrity. |
| 3 SHDN | Active-Low Enable | Pulled high (≥1.4V) for operation; pulled low (<0.5V) to disable regulator and reduce IQ to 0.1µA; hysteresis of 30mV prevents chatter. |
| 4 FLAG | Open-Drain Fault Output | Asserts low when sustained overcurrent exceeds blanking time; requires external pull-up; remains high during thermal shutdown or SHDN assertion. |
| 5 SS | Soft-Start Control | Connects to GND via capacitor (CSS) to set output rise time; floating yields ~1ms ramp; 0.1µF yields 40–150ms per datasheet. |
| 6 OUT | Regulated Output | Delivers 3.3V ±2%; bypassed with ≥3.3µF ceramic cap (ESR < 0.2Ω); stable under resistive or 250mA constant-current loads. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated FLAG output | Provides system-level overcurrent indication without external comparators or logic; latches off pass transistor for safety-critical fault containment. |
| Programmable soft-start | Eliminates inrush current spikes and false resets during power-up by controlling output ramp rate via external CSS capacitor. |
| Reverse-current protection | Blocks current flow from OUT to IN when VOUT ≥ VIN, preventing backfeeding into upstream supplies or damaged source circuitry. |
| Thermal shutdown with hysteresis | Disables output at +165°C junction temperature and re-enables only after cooling by 15°C, avoiding oscillation during sustained overload. |
| Ultra-low shutdown current | 0.1µA shutdown IQ enables multi-week battery life in always-on portable devices such as GPS trackers or PDAs. |
Applications
| USB Port Power Management | SDIO Interface Regulation |
|---|---|
Use Scenario: Providing clean, protected 3.3V power to USB host controllers or downstream ports in notebook computers. IC Role / Device Role / Timing Role: LDO regulator with current-limiting switch and FLAG-based fault reporting for real-time overcurrent monitoring. Use Value: Prevents bus faults from damaging host controllers; FLAG signal allows firmware to log or isolate faulty peripherals before thermal damage occurs. | Use Scenario: Supplying regulated 3.3V to SD card slots or embedded SDIO peripherals in handheld devices. IC Role / Device Role / Timing Role: Primary voltage regulator with soft-start to avoid SD card initialization failures caused by rapid VCC ramp. Use Value: Programmable soft-start ensures compliant SDIO power-up timing; ±2% output accuracy maintains signal integrity across temperature and load variations. |
| Notebook System Rail | GPS Module Power |
Use Scenario: Delivering stable 3.3V to baseband processors or auxiliary logic in ultra-thin notebooks with tight thermal budgets. IC Role / Device Role / Timing Role: Compact, thermally efficient LDO with exposed-pad TDFN package and thermal shutdown for safe operation in confined spaces. Use Value: 1951.2mW max power dissipation at +70°C enables continuous 250mA delivery without forced airflow; reverse-current protection isolates rail during sleep mode. | Use Scenario: Powering GPS RF front-end and baseband ICs in automotive or portable navigation units requiring low-noise, low-quiescent operation. IC Role / Device Role / Timing Role: Low-noise (70µVRMS), low-IQ regulator with precise 3.3V output for analog-sensitive GPS circuitry. Use Value: 70µVRMS output noise minimizes phase noise degradation in GPS LNA stages; 90µA quiescent current extends battery runtime between satellite fixes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4834EUT33C-T | SOT23-6 package (same pinout), higher thermal resistance, lower max power dissipation (727mW vs. 1951.2mW). | Preferred for cost-sensitive, low-power designs where board space permits larger footprint and thermal performance is less constrained. | Select when PCB layout lacks thermal pad capability or when legacy SOT23 assembly infrastructure is in place. |
| MAX4832EUT33C-T | 100mA rated version, same FLAG functionality and 3.3V output, but lower current limit and reduced thermal margin. | Suitable for low-power SDIO or GPS subsystems drawing <100mA; not viable for USB port or full-load notebook rails. | Choose only if load current is confirmed ≤100mA and thermal headroom is adequate for ambient conditions. |
Compared with MAX4834EUT33C-T, the MAX4834ETT33C offers superior thermal performance in space-constrained layouts; compared with MAX4832EUT33C-T, it delivers 2.5× higher current capacity while retaining identical FLAG signaling and soft-start behavior - making it the optimal choice for 3.3V/250mA applications demanding reliability and compactness.
Availability
MAX4834ETT33C is available at Aetrix Electronics and suitable for USB port power management, SDIO interface regulation, and notebook system rail applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX4834ETT33C 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, mixed-signal, and power management ICs for industrial, computing, and portable electronics markets.
The MAX4834/MAX4835 product line targets space-constrained, battery-powered systems needing accurate, protected LDO regulation with intelligent fault signaling - specifically addressing USB, SDIO, and mobile computing power architecture requirements.
FAQ
What is the output voltage tolerance of the MAX4834ETT33C over temperature and load?
The MAX4834ETT33C guarantees ±2% output voltage accuracy across the full –40°C to +85°C operating temperature range and for load currents from 1mA to 250mA. This specification is verified by design correlation and production testing, ensuring stable 3.3V regulation in notebooks, GPS modules, and USB peripherals despite thermal drift or dynamic loading.
Does the MAX4834ETT33C provide reverse-current protection, and how is it implemented?
Yes, the MAX4834ETT33C includes integrated reverse-current protection. When VOUT exceeds VIN, the internal PMOS pass transistor turns off, limiting reverse current to ≤2µA (typical) at VOUT = 5.5V and VIN = 0V. This prevents backfeeding into upstream supplies and protects source circuitry during hot-swap or battery-swapping events in portable systems using MAX4834ETT33C.
How does the FLAG output of the MAX4834ETT33C behave during an overcurrent event?
The FLAG output of the MAX4834ETT33C is an open-drain signal that pulls low when load current exceeds the 270–330mA limit for longer than the blanking time (5–17ms). Once asserted, the pass transistor latches off until IN or SHDN is toggled. FLAG remains high during thermal shutdown or SHDN assertion, and requires an external pull-up resistor to interface with microcontroller GPIOs in systems using MAX4834ETT33C.
Can the soft-start time of the MAX4834ETT33C be adjusted, and what capacitor value yields ~100ms ramp?
Yes, the soft-start time of the MAX4834ETT33C is set by an external capacitor (CSS) from the SS pin to GND. Per the datasheet, tSS ≈ CSS (in nF) in milliseconds. A 100nF capacitor yields approximately 100ms output rise time (10% to 90% of 3.3V), which suppresses inrush current in high-capacitance loads like USB hubs or SD card sockets powered by MAX4834ETT33C.
What is the maximum continuous power dissipation for the MAX4834ETT33C in its TDFN package?
The MAX4834ETT33C in the 6-pin TDFN package has a maximum continuous power dissipation of 1951.2mW at +70°C ambient, with derating of 24.4mW/°C above that temperature. This rating assumes proper thermal design - including soldering the exposed paddle to a GND plane - and enables full 250mA operation in compact, fanless environments typical of devices using MAX4834ETT33C.
MAX4834ETT33C 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):
- 0.165V @ 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 Current
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TDFN-EP (3x3)
MAX4834ETT33C FAQ
1.How can I place an order for MAX4834ETT33C through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4834ETT33C 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 MAX4834ETT33C reliable?
The price and inventory of MAX4834ETT33C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4834ETT33C is usually 5 days.
3.What payment methods are accepted for MAX4834ETT33C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4834ETT33C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4834ETT33C?
MAX4834ETT33C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4834ETT33C 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 MAX4834ETT33C?
For technical support, including MAX4834ETT33C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4834ETT33C requirements.
6.How does Aetrix verify that MAX4834ETT33C is sourced from the original manufacturer or authorized distributors?
All MAX4834ETT33C 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 MAX4834ETT33C meets industry standards.
7.What is the process for return or replacement of MAX4834ETT33C?
All MAX4834ETT33C units undergo pre-shipment inspection (PSI). If there is an issue with MAX4834ETT33C, 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 MAX4834ETT33C part is unused and in its original packaging.
Return procedure for MAX4834ETT33C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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