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Analog Devices Inc./Maxim Integrated MAX6329ZPUT+T
- Part No.:
- MAX6329ZPUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX6329ZPUT+T.pdf
- Description:
- IC REG LIN POS ADJ 150MA SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
The MAX6329ZPUT+T from Maxim Integrated is a 150mA, low-dropout linear voltage regulator with integrated microprocessor reset circuit, preset for +1.8V output and -10% reset threshold (Z suffix), housed in a 6-pin SOT23 package. It delivers ±3.0% output accuracy, consumes only 25µA quiescent current, and features 180mV dropout at 100mA - optimized for battery-powered handheld instruments and USB devices.
For engineers reviewing the MAX6329ZPUT+T datasheet, MAX6329ZPUT+T pinout, MAX6329ZPUT+T application, or MAX6329ZPUT+T equivalent, key selection criteria include its fixed +1.8V output, open-drain active-low RESET, SHDN control, thermal/short-circuit protection, and compatibility with 1µF ceramic output capacitors.
Technical Context
The MAX6329ZPUT+T integrates a P-channel MOSFET LDO regulator core and a precision reset supervisor sharing the same 1.23V internal reference. Its regulator operates from 2.5V to 5.5V input and maintains regulation down to 180mV dropout at 100mA load, while the reset circuit monitors VOUT against a -10% threshold (1.62V nominal for 1.8V output) and asserts RESET for ≥100ms after recovery.
It implements shutdown via active-low SHDN (pin 3), reducing supply current to <1µA, and uses SET (pin 5) tied to GND to select the preset +1.8V mode. The open-drain RESET (pin 4) requires an external pullup and sinks up to 3.2mA at 0.4V typical VOL.
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 - enables operation down to ~1.98V input, extending usable battery life in single-cell Li-ion or two-cell alkaline systems. |
| Supply Current | 25µA typical - minimizes standby power loss in always-on portable equipment. |
| Reset Threshold | -10% of VOUT (1.62V nominal) - triggers reset before microprocessor supply violation, supporting robust brownout detection. |
| Reset Timeout | 100ms minimum - guarantees clock and supply stabilization before processor release, eliminating need for external RC timing. |
| Shutdown Current | <1µA - enables ultra-low-power sleep modes without external disconnect switches. |
| Output Capacitor | 1µF minimum ceramic - allows compact, low-ESR decoupling compatible with space-constrained SOT23 layouts. |
Pinout & Package
Package: 6-pin SOT23-6 (JEDEC MO-178AA), 2.9mm × 1.6mm footprint, GND pin (pin 2) serves as thermal pad requiring soldering to PCB ground plane for optimal thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Accepts 2.5V–5.5V supply; reverse leakage protection prevents backfeed when OUT > IN. |
| 2 GND | Ground / thermal sink | Common return path and primary heat conduction path; must be connected to large copper area. |
| 3 SHDN | Active-low shutdown control | Pulls regulator into sub-1µA state; logic low = shutdown, high or floating = normal operation. |
| 4 RESET | Open-drain active-low reset output | Sinks current when asserted; requires external pullup to VOUT or system rail; compatible with 1.8V/3.3V µP reset inputs. |
| 5 SET | Feedback configuration | Tied to GND to enable +1.8V preset mode; left unconnected or pulled to GND via <50kΩ for Z-version operation. |
| 6 OUT | Regulated output | Delivers up to 150mA at +1.8V; bypassed with ≥1µF ceramic capacitor directly at pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reset supervisor | Eliminates external RC network or discrete supervisor IC, reducing BOM count and board area in portable designs. |
| Zero reverse leakage current | Prevents backup battery discharge through IN pin when main supply fails - critical for RTC and memory retention circuits. |
| Thermal and short-circuit protection | Auto-shutdown at +160°C junction temperature with 20°C hysteresis - enables safe operation under sustained overload or poor heatsinking. |
| 1.8V preset output with -10% reset | Matches common low-power microcontroller I/O and core voltage requirements while providing conservative reset margin for noisy rails. |
| 1µF minimum output capacitance | Enables use of small, low-cost ceramic capacitors instead of larger tantalum types - improves reliability and reduces footprint. |
Applications
| Hand-Held Instruments | USB Devices |
|---|---|
Use Scenario: Portable multimeters and data loggers powered by two AA batteries with dynamic load switching between measurement and display modes. IC Role / Device Role / Timing Role: Provides stable +1.8V supply to MCU and ADC while asserting RESET during battery sag below 1.62V. Use Value: Ensures deterministic startup and brownout recovery without external supervision, extending operational time per battery charge. | Use Scenario: Self-powered USB peripherals (e.g., HID keyboards) drawing burst current from host VBUS while maintaining local logic supply integrity. IC Role / Device Role / Timing Role: Regulates +1.8V for USB PHY and controller; RESET holds device in reset until VBUS stabilizes post-connection. Use Value: Prevents enumeration failures caused by premature firmware execution during USB attach transients. |
| Palm Top Computers | PCMCIA Cards |
Use Scenario: Legacy PDAs with ARM7-based SoCs requiring tightly regulated core voltage and reliable power-on reset sequencing. IC Role / Device Role / Timing Role: Supplies +1.8V core rail and generates synchronized reset pulse with ≥100ms timeout after power ramp. Use Value: Guarantees clean boot state across varying battery chemistries and aging profiles without redesigning reset timing. | Use Scenario: Hot-pluggable PCMCIA modems where card insertion causes rapid VCC ramp and potential undershoot. IC Role / Device Role / Timing Role: Regulates +1.8V interface logic and asserts RESET during VCC instability, releasing only after full stabilization. Use Value: Avoids bus contention and register corruption during hot-insertion by enforcing strict power-good window. |
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 |
|---|---|---|---|
| MAX6328ZPUT+T | Same package and pinout; differs only in reset threshold (-5% vs. -10%) - yields 1.71V trip point instead of 1.62V. | Suitable where tighter supply tolerance is required (e.g., high-speed logic with narrow VDD window). | Select MAX6328ZPUT+T if system requires earlier reset assertion; otherwise MAX6329ZPUT+T provides more noise immunity before reset activation. |
| TPS76318QDBVRQ1 | Automotive-grade 150mA LDO with 220mV dropout at 100mA; no integrated reset - requires external supervisor (e.g., TPS3809K33). | Used in AEC-Q100 qualified automotive modules where extended temperature range (-40°C to +125°C) is mandatory. | Choose TPS76318QDBVRQ1 only when automotive qualification and higher temp range outweigh integration benefits of MAX6329ZPUT+T. |
Compared with MAX6328ZPUT+T, the MAX6329ZPUT+T delays reset assertion until deeper undervoltage, improving noise immunity; compared with TPS76318QDBVRQ1, it integrates reset functionality but lacks automotive qualification and has slightly lower dropout performance.
Availability
MAX6329ZPUT+T is available at Aetrix Electronics and suitable for hand-held instruments, USB devices, and palm top computers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6329ZPUT+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 interface applications.
The MAX6329 belongs to Maxim's micropower LDO regulator family with integrated reset, engineered specifically for battery-operated portable electronics demanding ultra-low quiescent current and compact footprint.
FAQ
What output voltage does the MAX6329ZPUT+T deliver?
The MAX6329ZPUT+T delivers a fixed +1.8V output voltage with ±3.0% accuracy over the full operating temperature range (0°C to +85°C). This is achieved by connecting the SET pin to ground, selecting the Z-version preset configuration. The output remains stable under load currents up to 150mA and input voltages from 2.5V to 5.5V.
What is the function of the SHDN pin on the MAX6329ZPUT+T?
The SHDN pin (pin 3) on the MAX6329ZPUT+T is an active-low shutdown control input. When pulled low, it disables the regulator core and reduces total supply current to less than 1µA - ideal for deep-sleep modes in portable devices. When left unconnected or pulled high (e.g., to IN), the MAX6329ZPUT+T operates normally. No external pullup is required as the internal bias ensures defined state.
Does the MAX6329ZPUT+T include thermal protection?
Yes, the MAX6329ZPUT+T includes thermal shutdown protection that activates at +160°C junction temperature. Once triggered, the regulator turns off until the die cools by approximately 20°C, then resumes operation - preventing permanent damage during sustained overload or inadequate PCB heatsinking. This feature is fully integrated and requires no external components.
What type of reset output does the MAX6329ZPUT+T provide?
The MAX6329ZPUT+T provides an open-drain, active-low RESET output (pin 4). It sinks current when asserted and requires an external pullup resistor to VOUT or another compatible rail. This configuration supports wired-OR reset buses and is compatible with both 1.8V and 3.3V microprocessor reset inputs, ensuring flexibility in mixed-voltage system designs.
Can the MAX6329ZPUT+T be used with a 1µF output capacitor?
Yes, the MAX6329ZPUT+T is fully stable with a minimum 1µF ceramic output capacitor, as specified in the datasheet. Using a 1µF X7R or X5R dielectric capacitor placed close to the OUT and GND pins ensures stability across the full operating temperature range and load conditions up to 150mA - enabling compact, cost-effective designs without compromising transient response.
MAX6329ZPUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.23V (2.5V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.4V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 50 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Reset
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6329ZPUT+T FAQ
1.How can I place an order for MAX6329ZPUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6329ZPUT+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 MAX6329ZPUT+T reliable?
The price and inventory of MAX6329ZPUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6329ZPUT+T is usually 5 days.
3.What payment methods are accepted for MAX6329ZPUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6329ZPUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6329ZPUT+T?
MAX6329ZPUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6329ZPUT+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 MAX6329ZPUT+T?
For technical support, including MAX6329ZPUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6329ZPUT+T requirements.
6.How does Aetrix verify that MAX6329ZPUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6329ZPUT+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 MAX6329ZPUT+T meets industry standards.
7.What is the process for return or replacement of MAX6329ZPUT+T?
All MAX6329ZPUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6329ZPUT+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 MAX6329ZPUT+T part is unused and in its original packaging.
Return procedure for MAX6329ZPUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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