My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4835EUT28BD3
- Part No.:
- MAX4835EUT28BD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX4835EUT28BD3.pdf
- Description:
- 250MA LDO LINEAR REGULATORS WITH
- Quantity:
- Payment:
- Shipping:
Inventory:1,905
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX4835EUT28BD3 from Maxim Integrated is a 250mA low-dropout linear regulator with integrated current-limiting switch and active-low push-pull RESET output, preset to 2.8V output, operating from 2.5V to 5.5V input, featuring 165mV dropout at 250mA, 90µA quiescent current, and reverse-current protection. It serves as a fault-aware power rail supervisor in portable USB/SDIO interfaces.
For engineers reviewing the MAX4835EUT28BD3 datasheet, MAX4835EUT28BD3 pinout, MAX4835EUT28BD3 application, or MAX4835EUT28BD3 equivalent, key selection criteria include guaranteed 250mA load capability, 225ms RESET timeout (D3 suffix), shutdown discharge via 900Ω internal resistor, and SOT23-6 package compatibility with space-constrained embedded power domains.
Technical Context
The MAX4835EUT28BD3 implements a BiCMOS-based LDO architecture with a precision bandgap reference, error amplifier, and PMOS pass transistor. Its RESET function asserts low when VOUT drops below 0.875 × 2.8V = 2.45V, with a fixed 225ms timeout after fault clearance.
It integrates soft-start control via external capacitor on SS pin (tSS = CSS in nF), thermal shutdown at +165°C with 15°C hysteresis, and reverse-current protection that limits IN leakage to ≤2µA when VOUT ≥ VIN. Shutdown reduces IQ to 0.1µA while enabling OUT discharge through an internal 900Ω path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8V ±2% over -40°C to +85°C - ensures stable core voltage for 2.8V I/O rails in portable devices |
| Max Load Current | 250mA guaranteed - supports high-pulse peripherals like SDIO card readers without dropout |
| Dropout Voltage | 165mV at 250mA - enables operation down to VIN = 2.965V, critical for single-cell Li-ion battery systems |
| Quiescent Current | 90µA typical - minimizes standby power loss in always-on USB device detection circuits |
| RESET Timeout | 225ms (D3 suffix) - prevents spurious resets during brief brownouts while ensuring reliable system recovery |
| Shutdown Current | 0.1µA - allows deep-sleep modes in battery-powered GPS and PDA applications |
| Reverse Current | <2µA when VOUT ≥ VIN - eliminates backfeed into shared input rails during hot-swap or partial power-down |
Pinout & Package
MAX4835EUT28BD3 uses a 6-pin SOT23-6 package (3.0mm × 1.7mm × 1.3mm), with exposed pad internally connected to GND for thermal management. Pin 1 is IN; Pin 2 is GND; Pin 3 is SHDN; Pin 4 is RESET; Pin 5 is SS; Pin 6 is OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Power Supply | Bypassed with 0.1µF ceramic capacitor; accepts 2.5V–5.5V; UVLO triggers at 2.25V |
| 2 (GND) | Ground Reference | Common return for all internal circuits and exposed pad connection point |
| 3 (SHDN) | Active-Low Enable | Pulled low to enter 0.1µA shutdown; requires >1.4V to enable; includes 30mV hysteresis |
| 4 (RESET) | Push-Pull Reset Output | Asserts low on VOUT < 2.45V, VIN < 2.25V, thermal shutdown, or SHDN low; holds low 225ms post-fault |
| 5 (SS) | Soft-Start Control | Connects to GND via capacitor to set ramp time (e.g., 0.1µF → 100ms); ensures controlled inrush |
| 6 (OUT) | Regulated Output | Delivers 2.8V ±2%; requires ≥3.3µF ceramic cap with ESR < 0.2Ω for stability |
Key Features
| Feature | Design Value |
|---|---|
| Integrated RESET with programmable timeout | 225ms assertion window (D3) prevents false resets during transient dips while ensuring deterministic recovery |
| Shutdown output discharge | 900Ω internal pull-down discharges OUT during SHDN low - eliminates floating voltage in sequenced power-down |
| Accurate current limiting | 270–330mA limit threshold - protects downstream circuitry during short-circuit without latch-off (unlike FLAG variant) |
| Thermal shutdown with hysteresis | +165°C trip / +150°C release - enables safe pulsed operation under sustained overload without damage |
| Reverse-current protection | ≤2µA reverse leakage at VOUT = 5.5V - prevents backfeeding into shared input sources during partial system power-off |
Applications
| USB Port Power Management | SDIO Card Interface |
|---|---|
Use Scenario: Regulating and supervising power to USB peripheral ports in notebook computers during hot-plug events and bus suspend/resume cycles. IC Role / Device Role / Timing Role: Provides 2.8V rail with RESET assertion on undervoltage or thermal fault, enabling host controller to gracefully disable port before data corruption. Use Value: Prevents enumeration failures by holding USB reset until VOUT stabilizes post-soft-start and rejecting noise-induced resets via 225ms timeout. | Use Scenario: Powering SDIO memory cards in GPS receivers where intermittent antenna coupling causes supply ripple and brownout conditions. IC Role / Device Role / Timing Role: Delivers regulated 2.8V with precise RESET threshold (2.45V) and blanking immunity to ensure card initialization completes before host firmware proceeds. Use Value: Eliminates SDIO command timeouts caused by momentary VOUT dips below 2.5V, thanks to reset transient immunity up to 54µs at 10mV overdrive. |
| Cell Phone Baseband Core | PDA Application Processor Rail |
Use Scenario: Supplying clean 2.8V to baseband processor I/O banks during RF transmission bursts that induce input rail sag. IC Role / Device Role / Timing Role: Acts as current-limited, fault-signaling LDO with fast RESET response (<35µs) to notify PMIC of output collapse during high-current TX events. Use Value: Enables immediate software throttling or RF power reduction upon RESET assertion, avoiding processor lockup or memory corruption. | Use Scenario: Powering application processor subsystems in palmtop devices requiring coordinated power sequencing and brownout resilience. IC Role / Device Role / Timing Role: Supplies 2.8V with soft-start (configurable via SS pin) and shutdown discharge to prevent hold-up voltage conflicts during multi-rail power-down. Use Value: Ensures deterministic reset timing across processor, memory, and display controllers by synchronizing RESET deassertion with full VOUT stabilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-RESET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4835ETT28D3-T | TDFN-6 package (3mm × 3mm), same electrical specs, enhanced thermal performance via exposed pad | Suitable for higher-power-density layouts requiring lower junction-to-board thermal resistance | Select when PCB layout allows larger footprint and thermal management prioritizes junction temperature over board area |
| MAX4836EUT28BD3-T | 500mA rated output current, identical pinout and RESET functionality, higher dropout (200mV @ 500mA) | Supports higher-current peripherals such as USB 3.0 hubs or dual SDIO slots without derating | Choose when future-proofing for increased load or when sharing layout with 500mA variants in BOM consolidation |
Compared with MAX4835ETT28D3-T, the MAX4835EUT28BD3 offers smaller footprint but higher thermal resistance; compared with MAX4836EUT28BD3-T, it delivers tighter dropout and lower IQ at 250mA, making it optimal for ultra-low-power 2.8V rail applications where peak current stays within spec.
Availability
MAX4835EUT28BD3 is available at Aetrix Electronics and suitable for USB ports, SDIO interfaces, and portable GPS systems requiring stable component supply with guaranteed 250mA delivery and precise 2.8V regulation.
Supply support for MAX4835EUT28BD3 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, automotive, and consumer systems.
The MAX4835 family targets compact, fault-resilient power rails in portable electronics, combining LDO regulation, current limiting, and intelligent RESET supervision in minimal footprint packages.
FAQ
What is the exact RESET threshold voltage for MAX4835EUT28BD3?
The MAX4835EUT28BD3 has a nominal output voltage of 2.8V, and its RESET threshold is defined as 87.5% of VOUT, resulting in 2.45V. The datasheet specifies this threshold with ±2.5% tolerance (0.85× to 0.90× VOUT), meaning RESET asserts when VOUT falls between 2.38V and 2.52V. This value is factory-trimmed and applies across the full -40°C to +85°C temperature range.
Does MAX4835EUT28BD3 support adjustable output voltage?
No, MAX4835EUT28BD3 provides a fixed 2.8V output voltage. It belongs to the preset-output family with standard options of 1.8V, 2.5V, 2.8V, 3.0V, and 3.3V. Adjustable output versions are not offered in the MAX4834/MAX4835 series; for programmable LDOs, engineers should consider other Maxim families such as the MAX1725 or MAX886x series.
How does the soft-start function work on MAX4835EUT28BD3?
The MAX4835EUT28BD3 implements soft-start via the SS pin: connecting a capacitor (CSS) from SS to GND sets the output rise time as tSS ≈ CSS (in nF) milliseconds. With no capacitor, tSS defaults to 1ms. For MAX4835EUT28BD3, a 0.1µF (100nF) capacitor yields ~100ms soft-start, preventing inrush current spikes during power-up and reducing stress on input capacitors and source impedance.
Is MAX4835EUT28BD3 pin-compatible with MAX4832/MAX4833?
No, MAX4835EUT28BD3 is not pin-compatible with MAX4832/MAX4833. While both families share functional similarity (LDO + RESET/FLAG), MAX4832/MAX4833 are 100mA-rated devices in identical SOT23-6 packages but feature different internal circuitry and pin assignments - notably, their RESET/FLAG pin is located at Pin 3, whereas MAX4835EUT28BD3 places RESET at Pin 4. Layout reuse is not possible without redesign.
What is the purpose of the exposed pad on MAX4835EUT28BD3?
The MAX4835EUT28BD3 does not have an exposed pad; it is packaged in SOT23-6, which lacks an exposed thermal pad. Exposed pads are present only in the TDFN-6 variants (e.g., MAX4835ETT28D3-T). For MAX4835EUT28BD3, thermal dissipation relies solely on the standard SOT23 leadframe; maximum power dissipation is 727mW at +70°C ambient, derating by 9.1mW/°C above that temperature.
MAX4835EUT28BD3 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):
- 2.8V
- 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 Polarity
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX4835EUT28BD3 FAQ
1.How can I place an order for MAX4835EUT28BD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4835EUT28BD3 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 MAX4835EUT28BD3 reliable?
The price and inventory of MAX4835EUT28BD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4835EUT28BD3 is usually 5 days.
3.What payment methods are accepted for MAX4835EUT28BD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4835EUT28BD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4835EUT28BD3?
MAX4835EUT28BD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4835EUT28BD3 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 MAX4835EUT28BD3?
For technical support, including MAX4835EUT28BD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4835EUT28BD3 requirements.
6.How does Aetrix verify that MAX4835EUT28BD3 is sourced from the original manufacturer or authorized distributors?
All MAX4835EUT28BD3 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 MAX4835EUT28BD3 meets industry standards.
7.What is the process for return or replacement of MAX4835EUT28BD3?
All MAX4835EUT28BD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX4835EUT28BD3, 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 MAX4835EUT28BD3 part is unused and in its original packaging.
Return procedure for MAX4835EUT28BD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4835EUT28BD3 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…
