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Analog Devices Inc./Maxim Integrated MAX6329VHUT+
- Part No.:
- MAX6329VHUT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX6329VHUT+.pdf
- Description:
- IC SUPERVISOR 150MA LDO REG MPU
- Quantity:
- Payment:
- Shipping:
Inventory:1,468
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Product details
Overview
MAX6329VHUT+ from Maxim Integrated is a 150mA low-dropout linear voltage regulator with integrated microprocessor reset circuit, preset +1.8V output, -10% reset threshold, open-drain active-low RESET output, and shutdown control. It consumes only 25µA quiescent current, features 180mV dropout at 100mA, and operates from 2.5V to 5.5V input - ideal for battery-powered handheld instruments and USB devices.
For engineers reviewing the MAX6329VHUT+ datasheet, MAX6329VHUT+ pinout, MAX6329VHUT+ application, or MAX6329VHUT+ equivalent, key selection criteria include its fixed +1.8V output, -10% reset tolerance, SOT23-6 package, shutdown functionality, and compatibility with 1µF ceramic output capacitors.
Technical Context
The MAX6329VHUT+ integrates a P-channel MOSFET LDO regulator core and a precision reset supervisor sharing a common 1.23V reference. Its regulator uses internal feedback to maintain ±3.0% output accuracy over temperature and load, while the reset circuit monitors VOUT continuously and asserts RESET for ≥100ms after recovery from brownout.
Shutdown is implemented via an active-low SHDN pin that reduces total supply current to <1µA by disabling the pass transistor, reference, and bias circuits. The device includes reverse leakage protection, thermal shutdown at +160°C (20°C hysteresis), and short-circuit current limiting to 350mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +1.8V fixed, ±3.0% accuracy over 0°C to +85°C - ensures stable core logic supply for low-voltage microcontrollers. |
| Dropout Voltage | 180mV at 100mA load - enables operation down to VIN = 1.98V, extending usable battery life in single-cell Li-ion or dual-cell alkaline systems. |
| Supply Current | 25µA typical, independent of load - minimizes standby power in always-on portable applications. |
| Reset Threshold | -10% of VOUT (1.62V typ) - triggers reset before critical undervoltage causes processor corruption; matches industry-standard µP tolerance bands. |
| Reset Timeout | 100ms minimum - guarantees clock oscillator and supply stabilization before releasing processor reset. |
| Shutdown Current | <1µA max - enables deep-sleep modes in battery-backed systems without compromising runtime. |
| Output Capacitor | 1µF min ceramic - supports compact, low-BOM-count designs without requiring large electrolytics or complex compensation. |
| Input Voltage Range | 2.5V to 5.5V - compatible with wide-input DC-DC stages, USB ports, and multi-cell battery sources. |
Pinout & Package
MAX6329VHUT+ is housed in a 6-pin SOT23-6 package with exposed pad thermal enhancement. GND serves as both electrical reference and primary heat path; recommended soldering to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Accepts 2.5V–5.5V unregulated supply; connects to upstream DC source or battery. |
| 2 GND | Ground reference & thermal sink | Common return for regulator, reset, and shutdown; must be connected to large copper area for thermal dissipation. |
| 3 SHDN | Active-low shutdown control | Pulls regulator into sub-1µA sleep mode when driven low; connect to MCU GPIO or system power manager. |
| 4 RESET | Open-drain active-low reset output | Sinks current to assert reset on µP's active-low /RESET pin; requires external pullup to VOUT or system rail. |
| 5 SET | Feedback configuration node | Internally tied to GND for +1.8V fixed output (VH suffix); no external components required. |
| 6 OUT | Regulated +1.8V output | Delivers up to 150mA; bypassed with ≥1µF ceramic capacitor placed adjacent to pin for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reset supervisor | Eliminates need for discrete RC timing networks or external supervisors - reduces BOM count and board space in space-constrained designs. |
| Reverse leakage protection | Zero reverse current from OUT to IN enables backup battery operation without external blocking diodes - critical for fail-safe power management. |
| Thermal & short-circuit protection | Auto-recovering shutdown at +160°C and 350mA current limit prevent damage during fault conditions - enhances field reliability without external protection circuitry. |
| Low-noise, high-PSRR regulation | Typical PSRR >50dB at 1kHz improves immunity to switching noise from adjacent DC-DC converters - preserves signal integrity in mixed-signal SoC systems. |
| 1µF ceramic capacitor stability | Guaranteed stability with low-ESR ceramics simplifies layout and avoids costly tantalum or polymer alternatives - lowers total system cost. |
Applications
| Hand-Held Instruments | USB-Powered Peripherals |
|---|---|
|
Use Scenario: Portable multimeters and data loggers powered by AA/AAA batteries or USB bus power. IC Role / Device Role / Timing Role: Primary 1.8V core supply regulator with brownout detection and controlled power-up sequencing. Use Value: 25µA quiescent current extends battery life; 100ms reset timeout prevents spurious MCU resets during battery insertion or USB hot-plug events. |
Use Scenario: USB audio adapters, HID devices, and flash drive controllers drawing power directly from USB 5V. IC Role / Device Role / Timing Role: Local 1.8V LDO for digital logic and interface circuitry, with integrated reset to ensure clean boot after USB enumeration. Use Value: 180mV dropout allows full 1.8V regulation even as USB voltage sags to 4.4V; open-drain RESET interfaces directly with standard USB controller reset inputs. |
| Palm-Top Computers | PCMCIA Cards |
|
Use Scenario: Legacy PDAs and early smartphones requiring ultra-low-power 1.8V core rails for ARM7/ARM9 processors. IC Role / Device Role / Timing Role: Main system regulator with shutdown control synchronized to host suspend/resume states. Use Value: Sub-1µA shutdown current meets stringent ACPI S3/S4 requirements; thermal protection prevents overheating in sealed plastic enclosures. |
Use Scenario: Hot-swappable PCMCIA memory and modem cards operating from 3.3V or 5V host slots. IC Role / Device Role / Timing Role: Local 1.8V supply generator with reset assertion during card insertion/removal to initialize controller state. Use Value: Reverse leakage protection isolates card's 1.8V rail from host 3.3V/5V during partial insertion - prevents backfeeding and slot damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator with integrated reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6328VHUT+ | Same package and pinout, but lacks SHDN pin - fixed operation only; 25µA IQ unchanged. | No software-controlled deep-sleep capability; suitable only for always-on or hardware-reset-only systems. | Select MAX6328VHUT+ only if shutdown functionality is unnecessary and BOM simplification is prioritized. |
| TPS76318QDBVRQ1 | Automotive-grade 1.8V LDO (±2% accuracy), 120mV dropout at 150mA, no integrated reset - requires external supervisor. | Higher accuracy and lower dropout, but adds component count and layout complexity for reset generation. | Choose TPS76318QDBVRQ1 when AEC-Q100 qualification and tighter regulation are mandatory, and external reset supervision is acceptable. |
Compared with MAX6329VHUT+, MAX6328VHUT+ removes shutdown control to reduce cost and pin count, while TPS76318QDBVRQ1 trades integrated reset for automotive reliability and improved regulation - neither offers drop-in replacement capability due to functional and pinout differences.
Availability
MAX6329VHUT+ is available at Aetrix Electronics and suitable for hand-held instruments, USB-powered peripherals, and palm-top computers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX6329VHUT+ 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 connectivity applications.
The MAX6329 series targets battery-operated portable electronics needing highly integrated, ultra-low-power voltage regulation and reliable power-on reset - emphasizing minimal external components and robust fault protection.
FAQ
What output voltage does the MAX6329VHUT+ provide?
The MAX6329VHUT+ provides a fixed +1.8V regulated output with ±3.0% accuracy across 0°C to +85°C. This is confirmed by the 'VH' suffix in the part number, which corresponds to the +1.8V/-10% reset variant per Maxim's Selector Guide. The SET pin is internally configured for this preset value, eliminating need for external resistors.
Does the MAX6329VHUT+ include a shutdown feature?
Yes, the MAX6329VHUT+ includes an active-low SHDN pin (Pin 3) that reduces total supply current to less than 1µA when asserted. This feature is specific to the MAX6329 family (not MAX6349), enabling deep-sleep modes in portable systems. Driving SHDN low disables the pass transistor, reference, and all bias circuits.
What type of reset output does the MAX6329VHUT+ use?
The MAX6329VHUT+ uses an open-drain, active-low RESET output (Pin 4). It sinks current when asserted and requires an external pullup resistor to VOUT or another appropriate rail. This configuration allows wired-OR reset signaling and compatibility with diverse microprocessor reset inputs.
What is the minimum output capacitor required for stable operation of the MAX6329VHUT+?
The MAX6329VHUT+ requires a minimum 1µF ceramic output capacitor for stable operation across temperature and load. X7R or X5R dielectrics are recommended; Z5U/Y5V types may require ≥2.2µF below -10°C. This low capacitance requirement simplifies design and reduces cost versus regulators needing larger or specialized capacitors.
How does the MAX6329VHUT+ handle reverse voltage conditions?
The MAX6329VHUT+ includes integrated reverse leakage protection that blocks current flow from OUT to IN when VOUT > VIN. This eliminates the need for external blocking diodes in backup-battery or dual-supply configurations, preventing power loss and ensuring safe operation during supply transitions or faults.
MAX6329VHUT+ 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:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.23V (1.8V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.75V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 50 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Reset
- Protection Features:
- Over Current, Over Temperature, Reverse Current, Short Circuit
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6329VHUT+ FAQ
1.How can I place an order for MAX6329VHUT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6329VHUT+ 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 MAX6329VHUT+ reliable?
The price and inventory of MAX6329VHUT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6329VHUT+ is usually 5 days.
3.What payment methods are accepted for MAX6329VHUT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6329VHUT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6329VHUT+?
MAX6329VHUT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6329VHUT+ 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 MAX6329VHUT+?
For technical support, including MAX6329VHUT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6329VHUT+ requirements.
6.How does Aetrix verify that MAX6329VHUT+ is sourced from the original manufacturer or authorized distributors?
All MAX6329VHUT+ 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 MAX6329VHUT+ meets industry standards.
7.What is the process for return or replacement of MAX6329VHUT+?
All MAX6329VHUT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6329VHUT+, 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 MAX6329VHUT+ part is unused and in its original packaging.
Return procedure for MAX6329VHUT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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