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Analog Devices Inc./Maxim Integrated MAX4832EUT18
- Part No.:
- MAX4832EUT18
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX4832EUT18.pdf
- Description:
- 100MA, LDO LINEAR REGULATOR WITH
- Quantity:
- Payment:
- Shipping:
Inventory:690
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Product details
Overview
The MAX4832EUT18 from Maxim Integrated is a 100mA, 1.8V-output 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 130mV dropout at 100mA, and consumes only 90µA quiescent current - designed for power management in compact portable systems such as SDIO and USB ports.
For engineers reviewing the MAX4832EUT18 datasheet, MAX4832EUT18 pinout, MAX4832EUT18 application, or MAX4832EUT18 equivalent, key selection criteria include its 1.8V fixed output, FLAG-based overload notification (not RESET), soft-start programmability via external capacitor, reverse-current protection, and SOT23-6 package compatibility with space-constrained embedded designs.
Technical Context
The MAX4832EUT18 implements a BiCMOS-based LDO architecture with an internal PMOS pass transistor, precision bandgap reference, and error amplifier delivering stable 1.8V regulation. Its FLAG function asserts low after sustained overcurrent exceeding 115–135mA 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 programmable output ramp time (e.g., 10ms with 10nF); shutdown reduces quiescent current to 0.1µA while discharging OUT via internal 900Ω resistor only in MAX4833 variants - not applicable here. Reverse-current protection ensures <0.1µA leakage when VOUT ≥ VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% over –40°C to +85°C - enables direct powering of 1.8V I/O domains without external feedback. |
| Max Output Current | 100mA guaranteed - supports moderate-power peripherals like SD card interfaces and USB PHYs. |
| Dropout Voltage | 130mV at 100mA load - allows operation with VIN as low as 1.93V, critical for battery-powered systems near end-of-life. |
| Quiescent Current | 90µA typical at full load - minimizes standby power loss in always-on subsystems. |
| Current Limit Threshold | 115–135mA - provides robust short-circuit protection while avoiding nuisance tripping during transient loads. |
| FLAG Blanking Time | 5–17ms - prevents false overcurrent flags during startup or brief inrush events. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion, 3.3V rails, and USB 5V sources. |
Pinout & Package
MAX4832EUT18 is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA) with exposed pad internally connected to GND for thermal enhancement. Pin 1 = IN, Pin 2 = GND, Pin 3 = SHDN, Pin 4 = FLAG, Pin 5 = SS, Pin 6 = OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Power Input | Regulator input; requires 0.1µF ceramic bypass to GND - must be ≥2.5V for proper operation. |
| 2 (GND) | Ground Reference | Common return path for all internal circuits and external capacitors; connects to exposed pad. |
| 3 (SHDN) | Active-Low Enable | Pull low to disable regulator and reduce IQ to 0.1µA; tie to IN or logic high for normal operation. |
| 4 (FLAG) | Open-Drain Fault Indicator | Asserts low when load current exceeds limit for >blanking time; requires external pull-up for logic-level interface. |
| 5 (SS) | Soft-Start Control | Connect external capacitor to GND to set output rise time (e.g., 10nF → 10ms); floating = ~1ms default. |
| 6 (OUT) | Regulated Output | 1.8V supply output; requires ≥3.3µF ceramic capacitor with ESR <0.2Ω for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Accurate current-limiting switch | 115–135mA threshold with latch-off behavior - eliminates need for external current-sense circuitry in fault-tolerant designs. |
| FLAG output with blanking | 5–17ms programmable immunity window - prevents false triggers during startup or pulsed loads. |
| Ultra-low quiescent current | 90µA active / 0.1µA shutdown - extends battery life in portable devices with intermittent operation. |
| Reverse-current protection | <0.1µA reverse leakage at VOUT = 5.5V - prevents backfeeding into input rail during hot-swap or multi-rail sequencing. |
| Low dropout voltage | 130mV at 100mA - enables efficient regulation from aging batteries or low-headroom supplies. |
Applications
| SDIO Port Power Management | USB Device Power Rail |
|---|---|
|
Use Scenario: Powering SDIO host controllers and memory cards in handheld devices where input voltage varies between 2.7V–5.5V. IC Role / Device Role / Timing Role: LDO regulator providing clean, stable 1.8V supply with overcurrent flagging to prevent bus lockup during card insertion faults. Use Value: FLAG output signals MCU to disable SDIO clock and reset interface before damage occurs, improving system reliability without software polling. |
Use Scenario: Supplying 1.8V I/O for USB transceivers or PHYs in portable gadgets operating from USB VBUS or battery. IC Role / Device Role / Timing Role: Primary voltage regulator with reverse-current blocking - isolates USB data lines from input rail during cable disconnect or VBUS collapse. Use Value: Prevents backflow into USB port during hot-unplug, meeting USB compliance requirements while eliminating need for external diode. |
| Notebook Subsystem Rail | GPS Module Bias Supply |
|
Use Scenario: Generating dedicated 1.8V rail for GPS baseband ICs or RF front-end components in ultraportable notebooks. IC Role / Device Role / Timing Role: Low-noise, low-IQ regulator with soft-start to avoid inrush-induced brownouts on shared motherboard power planes. Use Value: Programmable soft-start (via SS pin) eliminates voltage droop on main 3.3V rail during GPS module power-up, preventing system resets. |
Use Scenario: Powering GPS receiver modules requiring precise 1.8V bias under varying battery conditions (3.0V–4.2V). IC Role / Device Role / Timing Role: High-accuracy LDO with ±2% output tolerance ensuring consistent ADC reference and oscillator performance. Use Value: Tight output regulation maintains GPS signal acquisition sensitivity across temperature and load, reducing time-to-first-fix degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4832ETT18C | Same electrical specs and FLAG functionality, but in 3×3mm TDFN-6 package with exposed thermal pad. | Better thermal performance (1951mW dissipation vs. 727mW) - preferred for higher ambient or continuous 100mA loads. | Select MAX4832ETT18C when PCB layout allows larger footprint and thermal management is critical. |
| MAX4834EUT18 | Pin-compatible 250mA version with identical 1.8V output, FLAG, and SOT23-6 package - no change to board layout required. | Higher current capability supports future design scaling or additional downstream loads without redesign. | Choose MAX4834EUT18 if system load margin is tight or if future firmware updates may increase peripheral power demand. |
Compared with MAX4832ETT18C, the MAX4832EUT18 offers lower thermal resistance cost trade-off in space-constrained layouts; compared with MAX4834EUT18, it provides optimal efficiency and cost for stable 100mA applications without overdesign.
Availability
MAX4832EUT18 is available at Aetrix Electronics and suitable for SDIO ports, USB device power rails, and notebook subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX4832EUT18 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX4832 family was designed specifically for portable electronics requiring accurate, low-IQ LDOs with intelligent fault reporting - targeting SDIO, USB, and GPS subsystems where space, power, and reliability are critical.
FAQ
What is the output voltage tolerance of the MAX4832EUT18 over temperature and load?
The MAX4832EUT18 guarantees ±2% output voltage accuracy across –40°C to +85°C and for load currents from 1mA to 100mA. This specification is confirmed in the Electrical Characteristics table under "Output Voltage Accuracy" and applies directly to the MAX4832EUT18 with its factory-programmed 1.8V output.
Does the MAX4832EUT18 provide reverse-current protection, and how is it implemented?
Yes, the MAX4832EUT18 includes integrated reverse-current protection that limits leakage to ≤0.1µA when VOUT ≥ VIN. This is achieved by turning off the internal PMOS pass transistor when output voltage exceeds input voltage - a key feature verified in the Absolute Maximum Ratings and Electrical Characteristics sections of the datasheet for MAX4832EUT18.
How does the FLAG output of the MAX4832EUT18 behave during an overcurrent event?
The FLAG output of the MAX4832EUT18 goes low and latches off the pass transistor when load current exceeds 115–135mA for longer than the blanking time (5–17ms). Recovery requires cycling IN or SHDN - a behavior explicitly defined for MAX4832EUT18 in the Detailed Description and Pin Description sections.
What capacitor values are required for stable operation of the MAX4832EUT18?
The MAX4832EUT18 requires a minimum 3.3µF ceramic output capacitor with ESR <0.2Ω on the OUT pin, and a 0.1µF ceramic capacitor on the IN pin. These values are specified in the Applications Information section and validated for stability across –40°C to +85°C and up to 100mA load - confirmed for MAX4832EUT18.
Is the MAX4832EUT18 pin-compatible with higher-current versions like the MAX4834EUT18?
Yes, the MAX4832EUT18 is pin-compatible with the MAX4834EUT18 - both use the same SOT23-6 package and identical pinout (IN, GND, SHDN, FLAG, SS, OUT). This compatibility is explicitly stated in the Ordering Information section and Selector Guide for MAX4832EUT18 and MAX4834EUT18.
MAX4832EUT18 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):
- 1.8V
- 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
MAX4832EUT18 FAQ
1.How can I place an order for MAX4832EUT18 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4832EUT18 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 MAX4832EUT18 reliable?
The price and inventory of MAX4832EUT18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4832EUT18 is usually 5 days.
3.What payment methods are accepted for MAX4832EUT18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4832EUT18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4832EUT18?
MAX4832EUT18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4832EUT18 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 MAX4832EUT18?
For technical support, including MAX4832EUT18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4832EUT18 requirements.
6.How does Aetrix verify that MAX4832EUT18 is sourced from the original manufacturer or authorized distributors?
All MAX4832EUT18 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 MAX4832EUT18 meets industry standards.
7.What is the process for return or replacement of MAX4832EUT18?
All MAX4832EUT18 units undergo pre-shipment inspection (PSI). If there is an issue with MAX4832EUT18, 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 MAX4832EUT18 part is unused and in its original packaging.
Return procedure for MAX4832EUT18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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