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Analog Devices Inc./Maxim Integrated MAX6329VPUT+
- Part No.:
- MAX6329VPUT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX6329VPUT+.pdf
- Description:
- IC REG LIN POS ADJ 150MA SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:769
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Product details
Overview
The MAX6329VPUT+ 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 (VTH = 1.50V to 1.65V), featuring 25µA quiescent current, 180mV dropout at 100mA, and shutdown input - designed for battery-powered portable electronics requiring precise power sequencing and brownout protection.
For engineers reviewing the MAX6329VPUT+ datasheet, MAX6329VPUT+ pinout, MAX6329VPUT+ application, or MAX6329VPUT+ equivalent, this device serves as a compact, single-chip solution combining regulated power delivery and supervisor functionality in a space-constrained SOT23-6 package - critical for hand-held instruments, USB devices, and cellular telephony power rails.
Technical Context
The MAX6329VPUT+ integrates a P-channel MOSFET LDO regulator core with an independent reset comparator sharing the same 1.23V reference. Its fixed +1.8V output is set by internal feedback resistors (SET tied to GND), while the -10% reset threshold (1.50V–1.65V) triggers active-low open-drain RESET assertion during undervoltage or shutdown events.
It employs thermal shutdown (160°C trip, 20°C hysteresis), short-circuit protection (350mA limit), and reverse leakage protection - enabling safe operation when OUT is back-driven (e.g., backup battery scenarios). The SHDN pin enables <1µA shutdown current, reducing system standby power without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +1.8V ±3.0% - stable supply for 1.8V logic cores and memory interfaces |
| Reset Threshold | 1.50V to 1.65V (-10% of 1.8V) - ensures µP reset before supply falls outside tolerance |
| Dropout Voltage | 180mV at 100mA - supports operation down to VIN = 1.98V, extending battery life |
| Quiescent Current | 25µA - enables multi-year battery operation in always-on portable systems |
| Shutdown Current | <1µA - eliminates regulator leakage during deep sleep modes |
| Reset Timeout | 100ms minimum - guarantees clock and supply stabilization before processor release |
| Output Capacitor | 1µF min ceramic - allows use of small, low-ESR MLCCs for compact layout |
Pinout & Package
Package: SOT23-6 - thermally enhanced 6-pin surface-mount package with exposed pad (GND functions as heatsink); footprint compatible with JEDEC MO-178AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Accepts 2.5V–5.5V supply; reverse leakage protected when VOUT > VIN |
| 2 GND | Ground / thermal pad | Reference node and primary heat path; must connect to large copper area for thermal dissipation |
| 3 SHDN | Active-low shutdown control | Pulls regulator into sub-1µA state; logic low = shutdown, high = normal operation |
| 4 RESET | Active-low open-drain reset output | Sinks current to assert reset; requires external pullup; asserts during undervoltage or SHDN activation |
| 5 SET | Feedback reference input | Tied to GND for +1.8V fixed output; unused in this variant - not adjustable |
| 6 OUT | Regulated output | Delivers up to 150mA at +1.8V; bypassed with ≥1µF capacitor for stability |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reset supervisor | Eliminates need for discrete RC timing or external supervisor IC, saving board space and BOM count |
| Reverse leakage protection | Blocks current flow from OUT to IN - enables seamless backup battery switchover without external diodes |
| Thermal & short-circuit protection | Auto-recovers after fault clearance; prevents damage during sustained overload or PCB overheating |
| Low-noise LDO architecture | PSRR >40dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding the input rail |
| 100ms reset timeout | Guarantees sufficient delay for oscillator startup and PLL lock before releasing processor reset |
Applications
| Hand-Held Instruments | USB Devices |
|---|---|
Use Scenario: Portable multimeters and data loggers powered by two AA cells (2.4V–3.2V). IC Role / Device Role / Timing Role: Provides clean +1.8V rail for ADC, MCU, and display driver while asserting RESET until voltage stabilizes post-power-up. Use Value: Enables reliable boot under varying battery voltage; 25µA IQ extends runtime beyond 12 months on alkaline cells. | Use Scenario: Self-powered USB peripherals (e.g., HID keyboards) drawing from 5V bus with local 1.8V logic domain. IC Role / Device Role / Timing Role: Regulates 5V USB input to +1.8V and monitors rail integrity; RESET holds peripheral in reset until VOUT reaches spec. Use Value: Prevents enumeration failure due to slow-rising 1.8V rail; open-drain RESET interfaces directly with USB controller reset pin. |
| Cellular Telephones | Palm Top Computers |
Use Scenario: Baseband processor I/O supply in GSM/GPRS handsets operating from Li-ion (3.0V–4.2V). IC Role / Device Role / Timing Role: Supplies +1.8V to RF transceiver interface and memory; SHDN enables dynamic power gating during sleep cycles. Use Value: Sub-1µA shutdown current reduces standby drain; 180mV dropout allows full utilization of battery capacity down to 1.98V. | Use Scenario: Compact PDAs with ARM-based SoC requiring tightly regulated 1.8V core I/O voltage. IC Role / Device Role / Timing Role: Delivers regulated +1.8V and provides synchronized reset to SoC and PMIC during cold/warm boot sequences. Use Value: Integrated 100ms timeout replaces external timing capacitor; SOT23-6 footprint fits tight board real estate constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator with reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6328VPUT+ | Same package and pinout; -5% reset threshold (1.71V–1.77V) instead of -10% | Better suited for systems requiring tighter reset window near nominal 1.8V | Select MAX6328VPUT+ if system tolerances demand reset assertion closer to 1.8V rather than at 1.65V |
| TPS76318QDBVRQ1 | Automotive-grade 1.8V LDO (no integrated reset); requires external supervisor (e.g., TPS3808G18) | Higher reliability qualification (AEC-Q100), but increases component count and layout complexity | Choose TPS76318QDBVRQ1 only for automotive applications where integrated reset is not required or can be added separately |
Compared with MAX6328VPUT+, the MAX6329VPUT+ offers earlier reset assertion (at 1.65V vs. 1.77V), improving brownout immunity; versus TPS76318QDBVRQ1, it delivers functional integration at the cost of non-automotive qualification - simplifying design for consumer portable gear.
Availability
MAX6329VPUT+ is available at Aetrix Electronics and suitable for hand-held instruments, USB devices, and cellular telephones requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX6329VPUT+ 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, mixed-signal, and power management ICs for demanding industrial, communications, and consumer applications.
The MAX6329/MAX6349 product line targets battery-powered portable equipment needing combined regulation and supervision in minimal footprint - emphasizing ultra-low IQ, thermal robustness, and reset timing accuracy.
FAQ
What output voltage does the MAX6329VPUT+ deliver?
The MAX6329VPUT+ delivers a fixed +1.8V output voltage with ±3.0% accuracy over temperature and load. This value is factory-set using internal feedback resistors; the SET pin is connected to GND in this variant and is not user-adjustable. The output remains stable across input voltages from 2.5V to 5.5V and load currents up to 150mA.
How does the reset function operate on the MAX6329VPUT+?
The MAX6329VPUT+ features an active-low open-drain RESET output that asserts when the regulated output drops below 1.50V–1.65V (−10% of 1.8V). RESET remains asserted for a minimum of 100ms after VOUT rises above the threshold, ensuring proper power and clock stabilization. It also asserts during SHDN activation, providing coordinated reset during controlled shutdown.
Can the MAX6329VPUT+ be used with a backup battery on the OUT pin?
Yes - the MAX6329VPUT+ includes reverse leakage protection that disables the internal pass transistor when VOUT exceeds VIN, preventing current flow from OUT to IN. This allows safe connection of a backup battery to the OUT pin without external blocking diodes, making it suitable for failover power architectures in portable systems.
What is the minimum output capacitor required for stable operation of the MAX6329VPUT+?
The MAX6329VPUT+ requires a minimum 1µF ceramic output capacitor (X7R or X5R dielectric) placed close to the OUT and GND pins for stable operation across temperature and load. Larger values (e.g., 10µF) improve transient response and PSRR. Using Z5U/Y5V dielectrics may require ≥2.2µF to maintain stability below −10°C.
Does the MAX6329VPUT+ include thermal protection?
Yes - the MAX6329VPUT+ incorporates thermal shutdown protection that activates at +160°C junction temperature and releases after cooling by 20°C hysteresis. During continuous overload, this results in pulsed output behavior to prevent permanent damage. The GND pin serves as the primary thermal path, so PCB layout must include generous copper area connected to Pin 2.
MAX6329VPUT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tube
- 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 (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 Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6329VPUT+ FAQ
1.How can I place an order for MAX6329VPUT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6329VPUT+ 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 MAX6329VPUT+ reliable?
The price and inventory of MAX6329VPUT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6329VPUT+ is usually 5 days.
3.What payment methods are accepted for MAX6329VPUT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6329VPUT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6329VPUT+?
MAX6329VPUT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6329VPUT+ 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 MAX6329VPUT+?
For technical support, including MAX6329VPUT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6329VPUT+ requirements.
6.How does Aetrix verify that MAX6329VPUT+ is sourced from the original manufacturer or authorized distributors?
All MAX6329VPUT+ 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 MAX6329VPUT+ meets industry standards.
7.What is the process for return or replacement of MAX6329VPUT+?
All MAX6329VPUT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6329VPUT+, 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 MAX6329VPUT+ part is unused and in its original packaging.
Return procedure for MAX6329VPUT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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