My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4834EUT18C
- Part No.:
- MAX4834EUT18C
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX4834EUT18C.pdf
- Description:
- 250MA LDO LINEAR REGULATORS WITH
- Quantity:
- Payment:
- Shipping:
Inventory:659
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX4834EUT18C from Maxim Integrated is a 250mA, 1.8V fixed-output LDO 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, 165mV dropout at full load, and reverse-current protection. It is used in USB ports and SDIO interfaces where precise current limiting and fault flagging are required.
For engineers reviewing the MAX4834EUT18C datasheet, MAX4834EUT18C pinout, MAX4834EUT18C application, or MAX4834EUT18C equivalent, key selection criteria include its 1.8V preset output, FLAG assertion behavior after blanking time, soft-start programmability via external capacitor, and SOT23-6 package compatibility with space-constrained portable power rails.
Technical Context
The MAX4834EUT18C implements a BiCMOS-based LDO architecture with an internal PMOS pass transistor, precision bandgap reference (1.23V), and error amplifier. Its FLAG function activates only after sustained overload exceeding the 270–330mA current limit for >5ms (blanking time), preventing false triggers during startup transients.
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 ensures <0.1µA IN leakage when VOUT ≥ VIN, critical for battery-backed or multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% over -40°C to +85°C - ensures stable core voltage for low-power microcontrollers and SD cards. |
| Max Load Current | 250mA guaranteed - supports high-pulse peripherals like USB 2.0 transceivers without thermal derating. |
| Dropout Voltage | 165mV at 250mA - enables operation down to VIN = 1.96V, extending battery life in single-cell Li-ion systems. |
| Quiescent Current | 90µA typical - minimizes standby power loss in always-on USB device enumeration circuits. |
| Current Limit | 270–330mA - provides robust short-circuit protection while allowing brief inrush currents during hot-plug events. |
| FLAG Blanking Time | 5–17ms - suppresses false flag asserts during capacitor charging or transient load surges. |
| Shutdown Current | 0.1µA - enables deep-sleep modes in portable devices with zero-load battery drain. |
Pinout & Package
MAX4834EUT18C is housed in a 6-pin SOT23-6 package (3.0mm × 1.7mm × 1.3mm) with GND-connected exposed pad for thermal enhancement. 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; accepts 2.5V–5.5V supply; reverse-current protected. |
| 2 (GND) | Ground Reference | Common return for all internal circuits and exposed paddle; must be low-impedance for stability. |
| 3 (SHDN) | Active-Low Enable | Pulled high to enable; pulled low to shut down and discharge FLAG; VIH = 1.4V, VIL = 0.5V. |
| 4 (FLAG) | Open-Drain Fault Flag | Asserts low when sustained overload exceeds blanking time; requires external pull-up to logic rail. |
| 5 (SS) | Soft-Start Control | Connects to GND via capacitor (e.g., 0.01µF → 10ms ramp); floating = 1ms fixed ramp. |
| 6 (OUT) | Regulated Output | Delivers 1.8V ±2%; bypassed with ≥3.3µF ceramic cap (ESR <0.2Ω) for stability and noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated FLAG with latch-off | Prevents continuous fault propagation: latches off pass transistor on confirmed overload, requiring IN/SHDN toggle to reset. |
| Programmable soft-start | Eliminates inrush current spikes and false resets by controlling output rise time via external CSS capacitor. |
| Reverse-current protection | Blocks backfeed from 1.8V output to lower-input rails, essential for multi-source power domains and battery isolation. |
| Ultra-low shutdown current | 0.1µA shutdown draw enables >10-year shelf life in coin-cell-powered GPS trackers and IoT sensors. |
| Thermal shutdown with hysteresis | +165°C trip / +150°C recovery prevents thermal cycling damage during sustained overload conditions. |
Applications
| USB Host Port Protection | SDIO Card Power Management |
|---|---|
Use Scenario: Protecting USB 2.0 downstream ports from short circuits during cable hot-plug or peripheral failure. IC Role / Device Role / Timing Role: LDO regulator + current-limiting switch with FLAG signaling overload to host controller. Use Value: Prevents bus collapse by latching off on sustained >270mA faults while maintaining 1.8V rail integrity for enumeration logic. | Use Scenario: Supplying regulated 1.8V to SDIO memory cards in smartphones and tablets during read/write bursts. IC Role / Device Role / Timing Role: Low-noise, low-dropout power source with soft-start to avoid SD card initialization failures. Use Value: 70µVRMS output noise and 165mV dropout ensure reliable data transfer under 250mA peak loads. |
| Notebook Subsystem Rail | GPS Module Power Sequencing |
Use Scenario: Powering 1.8V I/O rails for embedded controllers and touchpad interfaces in ultrabooks. IC Role / Device Role / Timing Role: Primary LDO with FLAG-driven firmware monitoring of subsystem current draw. Use Value: 90µA IQ extends battery runtime; FLAG blinding window avoids false alerts during CPU wake-up surges. | Use Scenario: Delivering clean 1.8V to GPS RF front-end and baseband ICs during cold/warm starts. IC Role / Device Role / Timing Role: Regulator with programmable soft-start to coordinate power-up with GNSS signal acquisition timing. Use Value: CSS-tuned tSS aligns output ramp with GPS chip's internal POR requirements, eliminating lock-loss on boot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-fault-flag applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4832EUT18C | 100mA rated output; identical FLAG functionality, pinout, and 1.8V output. | Suitable for lower-current SDIO lines or isolated sensor rails where 250mA headroom is unnecessary. | Select when load current stays below 100mA to reduce cost and footprint without sacrificing FLAG diagnostics. |
| Torex XC6219B182MR-G | No integrated FLAG; 180mA output; 1.8V fixed; 1µA IQ; no reverse-current protection. | Lacks fault reporting-requires external current-sense circuitry for overload detection. | Choose only if FLAG is not required and ultra-low IQ dominates design priority over diagnostic capability. |
Compared with MAX4834EUT18C, MAX4832EUT18C offers identical feature set at reduced current capacity, simplifying BOM rationalization for sub-100mA nodes; XC6219B182MR-G trades away fault visibility and reverse-current blocking for lower quiescent consumption, demanding added system-level sensing for reliability.
Availability
MAX4834EUT18C is available at Aetrix Electronics and suitable for USB ports, SDIO interfaces, and notebook subsystem rails requiring stable component supply, long-term lifecycle support, and guaranteed 250mA current-limiting performance.
Supply support for MAX4834EUT18C 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, interface, and sensing applications.
The MAX4834/MAX4835 product line targets portable and battery-powered systems needing accurate current-limited LDOs with integrated fault signaling-optimized for SDIO, USB, and GPS power domains.
FAQ
What is the output voltage tolerance of the MAX4834EUT18C over temperature?
The MAX4834EUT18C maintains ±2% output voltage accuracy across the full -40°C to +85°C operating range, verified under 1mA–250mA load conditions. This specification ensures reliable 1.8V rail stability for SDIO and USB PHYs even in thermally aggressive environments like enclosed notebooks or automotive infotainment modules. The MAX4834EUT18C uses a trimmed bandgap reference and precision error amplifier to achieve this tight tolerance without external feedback components.
How does the FLAG output behave during a short-circuit event on the MAX4834EUT18C?
When the MAX4834EUT18C detects load current exceeding 270–330mA for longer than the blanking time (5–17ms), its open-drain FLAG pin pulls low and the internal pass transistor latches off. Recovery requires toggling either IN or SHDN from high-to-low-to-high. This behavior prevents thermal runaway during sustained shorts while allowing controlled system-level response-distinct from the MAX4835EUT18B's push-pull RESET assertion. The MAX4834EUT18C's latch-off mechanism is confirmed in the Functional Diagram and FLAG Output section of the datasheet.
Can the MAX4834EUT18C be used with a 1.5V input supply?
No-the MAX4834EUT18C requires a minimum input voltage of 2.5V per its Absolute Maximum Ratings and Electrical Characteristics tables. At 1.8V output, the 165mV dropout specification implies a functional VIN floor of ~1.96V, but the device incorporates undervoltage lockout (UVLO) that disables regulation below 2.00–2.25V. Attempting operation at 1.5V will result in no output regulation and undefined FLAG behavior. For sub-2.5V inputs, consider alternative regulators such as the MAX1725 or TPS7A05 series.
What is the recommended output capacitor for stable operation of the MAX4834EUT18C?
The MAX4834EUT18C 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 capacitors are preferred for temperature stability. Larger values (e.g., 10µF) improve PSRR and transient response but may increase start-up time. The capacitor must be placed adjacent to the OUT and GND pins; the MAX4834EUT18C remains stable with purely resistive loads and does not require series resistance for compensation.
Does the MAX4834EUT18C provide reverse-current protection, and how is it implemented?
Yes-the MAX4834EUT18C integrates reverse-current protection that limits IN terminal current to <0.1µA when VOUT ≥ VIN, verified at VOUT = 5.5V and VIN = 0V. This is achieved via internal control of the PMOS pass transistor gate, which forces cutoff when output voltage exceeds input. Unlike discrete diode solutions, this approach adds no forward voltage drop or thermal penalty. The feature is explicitly documented in the "Reverse OUT to IN Current" section and Electrical Characteristics table, ensuring safe operation in multi-rail systems where backup batteries or auxiliary supplies could backdrive the LDO.
MAX4834EUT18C 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):
- 1.8V
- 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:
- -
MAX4834EUT18C FAQ
1.How can I place an order for MAX4834EUT18C through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4834EUT18C 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 MAX4834EUT18C reliable?
The price and inventory of MAX4834EUT18C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4834EUT18C is usually 5 days.
3.What payment methods are accepted for MAX4834EUT18C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4834EUT18C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4834EUT18C?
MAX4834EUT18C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4834EUT18C 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 MAX4834EUT18C?
For technical support, including MAX4834EUT18C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4834EUT18C requirements.
6.How does Aetrix verify that MAX4834EUT18C is sourced from the original manufacturer or authorized distributors?
All MAX4834EUT18C 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 MAX4834EUT18C meets industry standards.
7.What is the process for return or replacement of MAX4834EUT18C?
All MAX4834EUT18C units undergo pre-shipment inspection (PSI). If there is an issue with MAX4834EUT18C, 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 MAX4834EUT18C part is unused and in its original packaging.
Return procedure for MAX4834EUT18C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4834EUT18C Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
