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Analog Devices Inc./Maxim Integrated MAX4834EUT33C
- Part No.:
- MAX4834EUT33C
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX4834EUT33C.pdf
- Description:
- 250MA LDO LINEAR REGULATORS WITH
- Quantity:
- Payment:
- Shipping:
Inventory:1,635
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Product details
Overview
MAX4834EUT33C 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, delivers ±2% output voltage accuracy over -40°C to +85°C, features 90µA quiescent current, reverse-current protection, and programmable soft-start via external capacitor. It is used in USB ports and SDIO interfaces where reliable current fault signaling is required.
For engineers reviewing the MAX4834EUT33C datasheet, MAX4834EUT33C pinout, MAX4834EUT33C application, or MAX4834EUT33C equivalent, key selection criteria include its 3.3V fixed output, FLAG-based latch-off behavior under sustained overload, 165mV dropout at 250mA, SOT23-6 package footprint, and compatibility with 3.3µF ceramic output capacitors for stable operation.
Technical Context
The MAX4834EUT33C implements a BiCMOS-based LDO architecture with an internal P-channel pass transistor, precision bandgap reference (1.23V), and error amplifier. Its FLAG function asserts low after sustained overcurrent exceeding 270–330mA for >5ms (blanking time), latching off the pass element until IN or SHDN is cycled.
Soft-start is controlled by an external capacitor on the SS pin, enabling adjustable output ramp time (1ms minimum internal, up to 150ms with 0.1µF). Reverse-current protection ensures <0.1µA leakage when VOUT ≥ VIN, and thermal shutdown activates at +165°C with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% over full temperature and load range - ensures stable supply for 3.3V logic without external feedback. |
| Max Load Current | 250mA guaranteed - supports moderate-power peripherals like USB transceivers or SD card controllers. |
| Dropout Voltage | 165mV at 250mA - enables regulation from 3.465V input, critical for battery-powered systems near end-of-discharge. |
| Quiescent Current | 90µA typical - minimizes standby power loss in always-on subsystems such as wake-on-USB circuits. |
| FLAG Blanking Time | 5–17ms - prevents false triggering during startup inrush or transient overloads, ensuring robust fault detection. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), 3.3V rails, and 5V USB sources. |
| Shutdown Current | 0.1µA - enables deep-sleep modes in portable devices without compromising system-level power budget. |
Pinout & Package
MAX4834EUT33C is housed in a 6-pin SOT23-6 package (3.0mm × 1.7mm × 1.3mm), with GND-connected exposed pad omitted in this variant. Pin 1 is IN; Pin 2 is GND; Pin 3 is SHDN/FLAG; Pin 4 is unused (no RESET); Pin 5 is SS; Pin 6 is OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Power Input | Bypassed with 0.1µF ceramic capacitor; must be ≥2.5V and ≤5.5V for regulation. |
| 2 (GND) | Ground Reference | Common return path for all internal circuits and external bypass caps; connects to PCB ground plane. |
| 3 (SHDN) | Active-Low Enable | Pulled high (≥1.4V) for operation; pulled low (≤0.5V) disables regulator and reduces IQ to 0.1µA. |
| 4 (FLAG) | Open-Drain Fault Indicator | Asserts low when load current exceeds limit for >5ms; requires external pull-up to logic rail (e.g., 3.3V). |
| 5 (SS) | Soft-Start Control | Connects to GND via capacitor (e.g., 0.01µF → 10ms ramp); floating = 1ms default rise time. |
| 6 (OUT) | Regulated Output | Delivers 3.3V ±2%; requires ≥3.3µF ceramic cap (ESR <0.2Ω) for stability across -40°C to +85°C. |
Key Features
| Feature | Design Value |
|---|---|
| Accurate current limiting | 270–330mA threshold with ±10% tolerance - enables predictable fault response without external sense resistors. |
| Latch-off FLAG behavior | Pass transistor disables and FLAG holds low until IN/SHDN toggle - prevents repeated cycling during persistent overload. |
| Reverse-current protection | Guaranteed <0.1µA reverse leakage at VOUT = 5.5V, VIN = 0V - avoids backfeeding into weak input sources. |
| Programmable soft-start | tSS = CSS (nF) ms - eliminates inrush current spikes and false resets during power-up with simple capacitor selection. |
| Thermal shutdown with hysteresis | +165°C trip / +150°C recovery - provides safe, self-resetting protection during sustained overload or poor heatsinking. |
Applications
| USB Host Port Protection | SDIO Card Power Management |
|---|---|
Use Scenario: Powering USB peripheral devices from a host controller while monitoring for cable shorts or hot-plug faults. IC Role / Device Role / Timing Role: 3.3V LDO with current-limiting switch and FLAG output acting as intelligent power switch and fault reporter. Use Value: Prevents bus collapse during short-circuit events; latched FLAG signal allows host MCU to log and disable port without polling. | Use Scenario: Supplying regulated 3.3V to SDIO memory cards in handheld devices with strict power sequencing requirements. IC Role / Device Role / Timing Role: Primary 3.3V rail generator with soft-start control to meet SDIO initialization timing and avoid reset glitches. Use Value: Programmable tSS ensures clean VOUT ramp within SDIO spec limits; ±2% accuracy maintains card interface compliance. |
| Notebook System Rail Monitoring | GPS Module Power Sequencing |
Use Scenario: Providing auxiliary 3.3V supply to embedded controllers or sensors in notebook platforms with thermal and overcurrent constraints. IC Role / Device Role / Timing Role: Standby-capable LDO with ultra-low 0.1µA shutdown current and thermal shutdown for unattended operation. Use Value: Enables long battery life in suspend mode; thermal protection avoids damage during enclosure overheating or fan failure. | Use Scenario: Powering GPS RF front-end and baseband ICs requiring clean, glitch-free 3.3V during cold/warm starts. IC Role / Device Role / Timing Role: Low-noise (70µVRMS), high-PSRR LDO delivering stable 3.3V with precise soft-start to meet GPS acquisition timing windows. Use Value: Minimizes phase noise injection into RF paths; soft-start prevents false GPS lock failures during power-on. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-fault-reporting applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4832EUT33C | 100mA rated output current; identical FLAG functionality, pinout, and package. | Suitable only for lower-current SDIO or GPIO peripherals; insufficient for USB 2.0 VBUS switching loads. | Select when load current stays below 100mA and board space/power budget favors direct pin compatibility. |
| MAX4836EUT33C | 500mA rated output; same FLAG feature and SOT23-6 footprint but higher thermal dissipation requirement. | Supports higher-power USB OTG or multi-lane SDIO applications; requires enhanced PCB copper area for thermal management. | Choose when future-proofing for >250mA peak loads or when sharing layout with 500mA variants across product families. |
Compared with MAX4832EUT33C and MAX4836EUT33C, the MAX4834EUT33C offers optimal balance of current capability (250mA), thermal margin, and footprint efficiency for mainstream portable USB/SDIO designs - avoiding overdesign while supporting typical interface power demands.
Availability
MAX4834EUT33C is available at Aetrix Electronics and suitable for USB ports, SDIO interfaces, and notebook auxiliary rails requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for MAX4834EUT33C 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 demanding industrial, automotive, and computing applications.
The MAX4834/MAX4835 product line targets portable and embedded systems needing fault-aware, low-quiescent-current LDOs with integrated current limiting and system-level signaling - specifically addressing USB, SDIO, and GPS power integrity challenges.
FAQ
What is the output voltage tolerance of the MAX4834EUT33C over temperature and load?
The MAX4834EUT33C 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 per the Electrical Characteristics table in the official datasheet and ensures reliable operation for 3.3V logic interfaces without external trimming.
Does the MAX4834EUT33C provide reverse-current protection, and how is it implemented?
Yes, the MAX4834EUT33C includes integrated reverse-current protection. When VOUT exceeds VIN, the internal P-channel pass transistor turns off, limiting reverse current to <0.1µA at VOUT = 5.5V and VIN = 0V. This prevents backfeeding into weak or disconnected input sources, a critical feature in shared-rail portable systems.
How does the FLAG output behave during an overcurrent event on the MAX4834EUT33C?
When load current exceeds the 270–330mA limit for longer than the blanking time (5–17ms), the MAX4834EUT33C asserts its open-drain FLAG low and latches off the pass transistor. The device remains latched until IN or SHDN is cycled high-low-high - providing a persistent fault signal for host MCU interrogation without continuous polling.
Can the MAX4834EUT33C operate with no external capacitor on the SS pin?
Yes, the MAX4834EUT33C includes a fixed 1ms internal soft-start timer. Leaving the SS pin floating results in a guaranteed 1ms output rise time, eliminating inrush current spikes. Adding an external capacitor (e.g., 0.01µF) extends tSS to 10ms, allowing precise control of ramp rate for sensitive downstream circuitry.
What is the maximum dropout voltage of the MAX4834EUT33C at full 250mA load?
The MAX4834EUT33C has a maximum dropout voltage of 165mV at 250mA load and across the -40°C to +85°C temperature range. This means it can maintain regulation down to VIN = 3.465V (3.3V + 165mV), making it suitable for single-cell Li-ion applications nearing end-of-discharge.
MAX4834EUT33C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Reset, Soft Start
- Protection Features:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
MAX4834EUT33C FAQ
1.How can I place an order for MAX4834EUT33C through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4834EUT33C 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 MAX4834EUT33C reliable?
The price and inventory of MAX4834EUT33C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4834EUT33C is usually 5 days.
3.What payment methods are accepted for MAX4834EUT33C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4834EUT33C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4834EUT33C?
MAX4834EUT33C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4834EUT33C 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 MAX4834EUT33C?
For technical support, including MAX4834EUT33C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4834EUT33C requirements.
6.How does Aetrix verify that MAX4834EUT33C is sourced from the original manufacturer or authorized distributors?
All MAX4834EUT33C 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 MAX4834EUT33C meets industry standards.
7.What is the process for return or replacement of MAX4834EUT33C?
All MAX4834EUT33C units undergo pre-shipment inspection (PSI). If there is an issue with MAX4834EUT33C, 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 MAX4834EUT33C part is unused and in its original packaging.
Return procedure for MAX4834EUT33C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4834EUT33C Tags
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