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Analog Devices Inc./Maxim Integrated MAX4832EUT33C-T
- Part No.:
- MAX4832EUT33C-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX4832EUT33C-T.pdf
- Description:
- IC REG LINEAR LDO 100MA
- Quantity:
- Payment:
- Shipping:
Inventory:1,760
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Product details
Overview
The MAX4832EUT33C-T from Maxim Integrated is a 3.3V, 100mA 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 130mV dropout at 100mA, 90µA quiescent current, and reverse-current protection. It is used in USB ports and SDIO interfaces where accurate current limiting and fault flagging are required.
For engineers reviewing the MAX4832EUT33C-T datasheet, MAX4832EUT33C-T pinout, MAX4832EUT33C-T application, or MAX4832EUT33C-T equivalent, this page delivers verified electrical parameters, package mapping, FLAG timing behavior, soft-start programmability, and real-world substitution guidance - all specific to the 3.3V SOT23-6 FLAG variant.
Technical Context
The MAX4832EUT33C-T implements a BiCMOS-based LDO architecture with an internal pass transistor, precision voltage reference (1.23V), and blanking-time-controlled FLAG assertion logic. Its current limit is fixed at 115–135mA (typical 125mA), and FLAG latches off the regulator after sustained overload exceeding tBLANK (5–17ms).
Soft-start is externally programmable via capacitor on SS pin (tSS = CSS in nF), with minimum 1ms internal ramp. Reverse-current protection ensures IN leakage remains ≤2µA 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 -40°C to +85°C - ensures stable rail for 3.3V logic and I/O interfaces. |
| Max Output Current | 100mA guaranteed - supports moderate-power peripherals like SD card slots and USB transceivers. |
| Dropout Voltage | 130mV at 100mA - enables operation with only 3.43V input for full 3.3V output, critical in battery-powered systems. |
| Quiescent Current | 90µA typical at full load - minimizes standby power loss in always-on portable devices. |
| FLAG Blanking Time | 5–17ms - prevents false triggering during transient inrush or startup surges. |
| Shutdown Current | 0.1µA - enables ultra-low-power sleep modes without external discharge circuitry. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), USB 5V, and regulated 3.3V/5V rails. |
Pinout & Package
MAX4832EUT33C-T is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA) with exposed pad internally connected to GND. The package measures 2.9mm × 2.8mm × 1.3mm and supports reflow soldering per JEDEC J-STD-020.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN | Regulator input; requires 0.1µF ceramic bypass close to pin to suppress high-frequency noise and stabilize control loop. |
| 2 | GND | Analog/digital ground reference; must be low-impedance connection to PCB ground plane. |
| 3 | SHDN | Active-low enable; pulled high to IN or logic supply >1.4V for operation; pulled low for 0.1µA shutdown mode. |
| 4 | FLAG | Open-drain fault indicator; sinks 3.2mA when asserted low after blanking time; requires external pull-up for logic-level interface. |
| 5 | SS | Soft-start control; connects to GND via capacitor (e.g., 10nF → 10ms ramp) to limit inrush current and avoid system reset glitches. |
| 6 | OUT | Regulated 3.3V output; requires ≥3.3µF ceramic capacitor with ESR <0.2Ω for stability across temperature and load. |
Key Features
| Feature | Design Value |
|---|---|
| Latched FLAG output | Asserts low and disables pass transistor upon sustained overcurrent (>tBLANK); requires IN or SHDN toggle to recover - eliminates need for external reset supervisor logic. |
| Reverse-current protection | Guarantees IN leakage ≤2µA when VOUT ≥ VIN - prevents backfeed into shared input rails in multi-rail systems. |
| Programmable soft-start | tSS = CSS (nF) ms; 1ms minimum internal ramp ensures safe startup even with no external capacitor - simplifies BOM and layout. |
| Ultra-low shutdown current | 0.1µA max - extends battery life in sleep states without requiring additional discharge FETs or resistors. |
| Thermal shutdown with hysteresis | +165°C trip / +150°C recovery - provides robust protection against sustained overload while avoiding oscillation near thermal limit. |
Applications
| USB Host Port Power Management | SDIO Card Slot Regulation |
|---|---|
Use Scenario: Providing clean, current-limited 3.3V power to USB peripheral controllers in notebook computers and docking stations. IC Role / Device Role / Timing Role: LDO regulator with FLAG-based overcurrent detection replaces discrete current-sense + comparator solutions. Use Value: Prevents bus faults from damaging host controller by latching off on sustained short-circuit, reducing firmware intervention needs. |
Use Scenario: Supplying regulated 3.3V to SD memory cards in GPS modules and handheld PDAs. IC Role / Device Role / Timing Role: Primary voltage regulator with built-in fault signaling for hot-plug detection and card insertion events. Use Value: FLAG output directly interfaces with microcontroller GPIO to trigger card-detect interrupts without external components. |
| Cell Phone Baseband Core Supply | Notebook Subsystem Rail |
Use Scenario: Delivering low-noise 3.3V to baseband processors during active data transmission phases. IC Role / Device Role / Timing Role: Low-PSRR, low-IQ LDO with precise current limit for burst-mode power delivery. Use Value: 70µVRMS output noise and 130mV dropout ensure signal integrity and extended battery runtime under dynamic load. |
Use Scenario: Powering auxiliary circuits such as keyboard controllers, touchpad ICs, and LED drivers in ultraportable notebooks. IC Role / Device Role / Timing Role: Secondary LDO with FLAG monitoring for subsystem-level fault isolation. Use Value: Enables independent power domain shutdown and diagnostics without affecting main CPU rail. |
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 |
|---|---|---|---|
| MAX4832EUT33B-T | Same package and 3.3V output, but RESET (push-pull) instead of FLAG (open-drain); includes 900Ω internal OUT discharge path in shutdown. | Used where system requires automatic reset pulse generation and output discharge - not suitable for latch-off recovery workflows. | Select MAX4832EUT33B-T only if push-pull RESET assertion and shutdown discharge are mandatory; otherwise, MAX4832EUT33C-T offers simpler GPIO interfacing. |
| TPS76333DBVR | 3.3V, 150mA LDO with ENABLE and active-low RESET; no current-limiting flag or blanking time; higher IQ (120µA) and no reverse-current protection. | Targeted at general-purpose regulation where fault detection is handled externally; lacks integrated overcurrent response. | Choose TPS76333DBVR only for cost-sensitive designs without current-limiting requirements; MAX4832EUT33C-T provides superior fault autonomy and lower IQ. |
Compared with MAX4832EUT33B-T and TPS76333DBVR, the MAX4832EUT33C-T uniquely combines latch-off overcurrent protection, ultra-low shutdown current, and reverse-current blocking - making it optimal for space-constrained, fault-resilient portable subsystems.
Availability
MAX4832EUT33C-T is available at Aetrix Electronics and suitable for USB ports, SDIO interfaces, and cell phone baseband subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX4832EUT33C-T 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 communication applications.
The MAX4832/MAX4833 product line targets portable and battery-powered systems needing compact, low-IQ LDOs with integrated fault signaling - specifically addressing USB, SDIO, and mobile peripheral power integrity challenges.
FAQ
What is the function of the FLAG pin on the MAX4832EUT33C-T?
The FLAG pin on the MAX4832EUT33C-T is an open-drain output that asserts low when load current exceeds the internal 115–135mA limit for longer than the blanking time (5–17ms). Once asserted, the LDO latches off until IN or SHDN is cycled. This behavior is intrinsic to the MAX4832EUT33C-T design and enables autonomous overcurrent protection without external supervision.
Does the MAX4832EUT33C-T provide reverse-current protection?
Yes, the MAX4832EUT33C-T guarantees reverse-current protection: when VOUT ≥ VIN, IN leakage is limited to ≤2µA. This feature is confirmed in the Electrical Characteristics table under "Reverse Current at VIN" and is critical for preventing backfeed in multi-source power domains - a key differentiator of the MAX4832EUT33C-T versus standard LDOs.
What is the minimum soft-start time for the MAX4832EUT33C-T, and how is it set?
The MAX4832EUT33C-T has a fixed minimum soft-start time of 1ms, achieved when the SS pin is left floating or connected directly to GND. For longer ramps, a capacitor (CSS) is connected from SS to GND, with tSS = CSS (in nF) ms - e.g., 10nF yields 10ms. This programmability is documented in the Typical Operating Characteristics and ensures reliable startup across varying load capacitances in the MAX4832EUT33C-T application.
Can the MAX4832EUT33C-T be used with a 2.5V input supply?
No - the MAX4832EUT33C-T requires VIN ≥ 2.5V minimum, but its 3.3V output necessitates VIN ≥ 3.43V (3.3V + 130mV dropout) to maintain regulation at full 100mA load. At 2.5V input, the device enters dropout and cannot sustain 3.3V output. This constraint is explicitly defined in the Absolute Maximum Ratings and Dropout Voltage specifications for the MAX4832EUT33C-T.
Is the MAX4832EUT33C-T pin-compatible with higher-current variants like the MAX4836 series?
No - the MAX4832EUT33C-T is not pin-compatible with the MAX4836/MAX4837 series. While both families share functional similarity, the MAX4836 uses a different pinout (e.g., RESET/FLAG on Pin 4, no SS pin), and the datasheet explicitly states "pin-compatible 500mA versions" refer to distinct part numbers with modified layouts. Direct replacement would require PCB redesign - a critical distinction for the MAX4832EUT33C-T in legacy designs.
MAX4832EUT33C-T 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):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.13V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Error Flag, 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:
- SOT-23-6
MAX4832EUT33C-T FAQ
1.How can I place an order for MAX4832EUT33C-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4832EUT33C-T 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 MAX4832EUT33C-T reliable?
The price and inventory of MAX4832EUT33C-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4832EUT33C-T is usually 5 days.
3.What payment methods are accepted for MAX4832EUT33C-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4832EUT33C-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4832EUT33C-T?
MAX4832EUT33C-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4832EUT33C-T 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 MAX4832EUT33C-T?
For technical support, including MAX4832EUT33C-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4832EUT33C-T requirements.
6.How does Aetrix verify that MAX4832EUT33C-T is sourced from the original manufacturer or authorized distributors?
All MAX4832EUT33C-T 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 MAX4832EUT33C-T meets industry standards.
7.What is the process for return or replacement of MAX4832EUT33C-T?
All MAX4832EUT33C-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4832EUT33C-T, 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 MAX4832EUT33C-T part is unused and in its original packaging.
Return procedure for MAX4832EUT33C-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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