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Analog Devices Inc./Maxim Integrated MAX4834ETT30C
- Part No.:
- MAX4834ETT30C
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX4834ETT30C.pdf
- Description:
- IC REG LINEAR 250MA LDO
- Quantity:
- Payment:
- Shipping:
Inventory:937
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Product details
Overview
MAX4834ETT30C from Maxim Integrated is a 3.0V fixed-output, 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 165mV dropout at full load, and consumes only 90µA quiescent current - ideal for USB port power management in portable electronics.
For engineers reviewing the MAX4834ETT30C datasheet, MAX4834ETT30C pinout, MAX4834ETT30C application, or MAX4834ETT30C equivalent, key selection criteria include its 3.0V preset output, FLAG-based fault reporting (not RESET), TDFN-6 package thermal performance, reverse-current protection, and soft-start programmability via external capacitor.
Technical Context
The MAX4834ETT30C implements a BiCMOS-based LDO architecture with an internal P-channel pass transistor, precision 1.23V reference, and error amplifier. Its FLAG function asserts low after sustained overcurrent exceeding 270–330mA for >5ms (blanking time), latching off the output until IN or SHDN is cycled.
Soft-start is controlled by an external capacitor on the SS pin, enabling programmable ramp time (1ms minimum internal, up to 150ms with 0.1µF); reverse-current protection actively disables the pass device when VOUT ≥ VIN, limiting reverse leakage to ≤2µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±2% over -40°C to +85°C - ensures stable core logic supply without external feedback. |
| Max Load Current | 250mA guaranteed - supports high-pulse peripherals like SDIO card readers and USB transceivers. |
| Dropout Voltage | 165mV at 250mA - enables regulation from 3.165V input, critical for battery-powered 3.3V rail derating. |
| Quiescent Current | 90µA at full load - minimizes standby power loss in always-on subsystems such as GPS receivers. |
| Shutdown Current | 0.1µA - allows deep-sleep mode in notebook EC controllers without compromising system wake latency. |
| Current Limit Threshold | 270–330mA - provides robust short-circuit protection while avoiding nuisance tripping during capacitive load inrush. |
| FLAG Blanking Time | 5–17ms - prevents false flag assertion during startup surge or transient overload events. |
Pinout & Package
MAX4834ETT30C is housed in a thermally enhanced 6-pin TDFN package (3mm × 3mm × 0.8mm) with exposed paddle electrically and thermally connected to GND. The compact footprint supports high-density PCB layouts in space-constrained mobile applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power Input | Regulator input (2.5V–5.5V); requires 0.1µF ceramic bypass to GND for stability and noise suppression. |
| 2 GND | Ground Reference | Analog/digital ground return; must be connected to PCB ground plane and tied to exposed paddle. |
| 3 SHDN | Active-Low Enable | Pull low to disable regulator and reduce IQ to 0.1µA; connect to IN or logic-high for normal operation. |
| 4 FLAG | Open-Drain Fault Indicator | Asserts low when sustained overcurrent exceeds limit for >5ms; requires external pull-up to logic supply. |
| 5 SS | Soft-Start Control | Connect external capacitor (0–0.1µF) to GND to program output rise time from 1ms to 150ms. |
| 6 OUT | Regulated Output | 3.0V output; requires ≥3.3µF ceramic capacitor (ESR <0.2Ω) to GND for loop stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated FLAG output | Open-drain signal with 0.4V max VOL at 3.2mA sink - directly interfaces with 1.8V/3.3V µC GPIO without level-shifting. |
| Latch-off overcurrent protection | Halts output after sustained overload and holds fault state until enable cycle - eliminates need for external reset supervisor. |
| Reverse-current protection | Blocks >VIN backfeed from output; limits reverse leakage to ≤2µA when VOUT ≥ VIN - prevents battery drain in dual-supply systems. |
| Programmable soft-start | Adjustable output ramp via SS pin capacitor - suppresses inrush current into large downstream capacitance (e.g., USB PHY decoupling). |
| Thermal shutdown with hysteresis | Triggers at +165°C junction temperature and re-enables at +150°C - provides self-recovering fault handling under continuous overload. |
Applications
| USB Host Port Power Switch | SDIO Card Power Management |
|---|---|
|
Use Scenario: Providing regulated 3.0V power to USB 2.0 downstream ports in notebooks with hot-plug detection and overcurrent isolation. IC Role / Device Role / Timing Role: Primary LDO power switch with FLAG-driven host interrupt signaling for port fault detection. Use Value: Enables immediate firmware response to cable shorts or defective peripherals without system reset - improves user experience and port reliability. |
Use Scenario: Supplying clean 3.0V to SDIO WLAN/BT modules in handheld devices where ESD immunity and fast transient response are critical. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO with reverse-current blocking to prevent SDIO bus contention during card insertion/removal. Use Value: Eliminates need for external reverse-blocking diode and discrete current limiter - reduces BOM count and board area by 3 components. |
| Notebook Embedded Controller (EC) Rail | GPS Receiver Core Supply |
|
Use Scenario: Delivering always-on 3.0V to embedded controller logic that manages keyboard, battery, and thermal functions across sleep/wake cycles. IC Role / Device Role / Timing Role: Ultra-low-IQ LDO with 0.1µA shutdown current and soft-start to meet ACPI S5/S3 power budget constraints. Use Value: Extends battery life in suspend mode by reducing EC rail leakage by >99% versus standard LDOs - adds ~2 hours of standby time. |
Use Scenario: Powering GPS baseband ICs requiring tight 3.0V tolerance and low 70µVRMS output noise for high-sensitivity RF acquisition. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO with 3.3µF output capacitor optimized for 10Hz–100kHz spectral purity. Use Value: Improves GPS time-to-first-fix (TTFF) by maintaining clean analog supply during weak-signal satellite lock - reduces average acquisition time by 18%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO current-limiting switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4834EUT30C | SOT23-6 package (vs. TDFN-6); higher thermal resistance (9.1mW/°C derating vs. 24.4mW/°C); identical electrical specs. | Better suited for low-power, low-density layouts where thermal mass is sufficient; less optimal for high-ambient industrial USB hubs. | Select when PCB real estate permits larger footprint and thermal design margin exceeds 25°C/W. |
| MAX4832EUT30C | 100mA rated output (vs. 250mA); same FLAG function, soft-start, and 3.0V output; lower quiescent current (65µA typical). | Targeted at ultra-low-power microcontroller I/O rails or sensor interfaces - insufficient for USB/SDIO peak loads. | Choose only for sub-100mA applications where MAX4834ETT30C's headroom is unnecessary and cost reduction is prioritized. |
Compared with MAX4834EUT30C, the MAX4834ETT30C offers superior thermal performance in high-power-density designs; compared with MAX4832EUT30C, it delivers 2.5× higher current capacity essential for interface power switching - making MAX4834ETT30C the only option meeting both 3.0V precision and 250mA USB/SDIO requirements in TDFN form factor.
Availability
MAX4834ETT30C is available at Aetrix Electronics and suitable for USB port power management, SDIO peripheral regulation, and notebook EC rail applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX4834ETT30C 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, sensing, and connectivity applications - with emphasis on high-reliability, low-power solutions for portable and industrial systems.
The MAX4834/MAX4835 family was engineered specifically for intelligent power-switching in portable interface ports, integrating current limiting, fault signaling, and thermal protection into space-constrained LDOs for USB, SDIO, and GPS subsystems.
FAQ
What output voltage does the MAX4834ETT30C deliver?
The MAX4834ETT30C delivers a factory-programmed fixed output voltage of 3.0V with ±2% accuracy across -40°C to +85°C. This value is encoded in the "30" suffix per Maxim's ordering guide and is not adjustable via external resistors - ensuring consistent regulation for 3.0V logic interfaces without calibration overhead.
Does the MAX4834ETT30C provide reverse-current protection?
Yes, the MAX4834ETT30C includes active reverse-current protection that disables the internal pass transistor when VOUT ≥ VIN, limiting reverse leakage current to ≤2µA. This prevents backfeeding into the input source - a critical feature for battery-backed systems or multi-rail architectures where output voltage may exceed input during sleep or fault conditions.
How does the FLAG output of the MAX4834ETT30C behave during overcurrent events?
The MAX4834ETT30C's open-drain FLAG output asserts low when load current exceeds 270–330mA for longer than the blanking time (5–17ms), then latches off the regulator output. Recovery requires cycling SHDN or IN; FLAG remains low until the device re-enters normal operation - providing unambiguous, persistent fault indication for host processor polling or interrupt handling.
What is the minimum recommended output capacitor for stable operation of the MAX4834ETT30C?
The MAX4834ETT30C requires a minimum 3.3µF ceramic output capacitor with ESR <0.2Ω for stable operation across -40°C to +85°C and up to 250mA load. X7R dielectric is recommended for temperature stability; larger values (e.g., 10µF) improve PSRR and transient response but must maintain low ESR to avoid phase-margin degradation.
Can the soft-start time of the MAX4834ETT30C be adjusted, and how?
Yes, the MAX4834ETT30C's soft-start time is programmable via an external capacitor (CSS) connected between the SS pin and GND. With CSS = 0 (floating), tSS is fixed at 1ms; CSS = 0.01µF yields ~10ms; CSS = 0.1µF extends tSS to 100–150ms. This enables precise control of inrush current into downstream capacitance without modifying the IC itself.
MAX4834ETT30C 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):
- 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)
MAX4834ETT30C FAQ
1.How can I place an order for MAX4834ETT30C through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4834ETT30C 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 MAX4834ETT30C reliable?
The price and inventory of MAX4834ETT30C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4834ETT30C is usually 5 days.
3.What payment methods are accepted for MAX4834ETT30C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4834ETT30C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4834ETT30C?
MAX4834ETT30C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4834ETT30C 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 MAX4834ETT30C?
For technical support, including MAX4834ETT30C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4834ETT30C requirements.
6.How does Aetrix verify that MAX4834ETT30C is sourced from the original manufacturer or authorized distributors?
All MAX4834ETT30C 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 MAX4834ETT30C meets industry standards.
7.What is the process for return or replacement of MAX4834ETT30C?
All MAX4834ETT30C units undergo pre-shipment inspection (PSI). If there is an issue with MAX4834ETT30C, 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 MAX4834ETT30C part is unused and in its original packaging.
Return procedure for MAX4834ETT30C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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