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Analog Devices Inc./Maxim Integrated MAX6349YPUT
- Part No.:
- MAX6349YPUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX6349YPUT.pdf
- Description:
- IC SUPERVISOR LDO REG W/ MPU RES
- Quantity:
- Payment:
- Shipping:
Inventory:4,573
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Product details
Overview
MAX6349YPUT from Maxim Integrated is a 150mA low-dropout linear voltage regulator with integrated microprocessor reset circuit, preset +1.8V output (±3.0% accuracy), 25µA quiescent current, and 180mV dropout at 100mA - designed for battery-powered portable electronics requiring stable power and reliable power-on reset signaling.
For engineers reviewing the MAX6349YPUT datasheet, MAX6349YPUT pinout, MAX6349YPUT application, or MAX6349YPUT equivalent, this page delivers verified technical context, exact SOT23-6 pin mapping, real-world use cases in USB devices and cellular telephones, and validated alternative options with documented functional differences.
Technical Context
The MAX6349YPUT integrates a P-channel MOSFET LDO regulator core and a precision reset supervisor sharing the same 1.23V reference. Its reset threshold is fixed at 2.08V to 2.28V (−10% of 1.8V nominal), with 100ms minimum timeout and active-low open-drain RESET output.
It features manual reset input (MR) with 20kΩ internal pullup to OUT, 120ns glitch rejection, and 500ns MR-to-reset delay. The SET pin enables either preset 1.8V operation (SET = GND) or adjustable mode (1.23V–5.0V), with ±10nA leakage and 1.20–1.26V reference voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +1.8V ±3.0% (preset, SET = GND); enables stable core logic supply for low-voltage microcontrollers |
| Max Output Current | 150mA continuous; sufficient for SoC peripherals and RF front-end biasing |
| Dropout Voltage | 180mV at 100mA load; allows operation down to VIN = 1.98V, extending single-cell Li-ion battery life |
| Quiescent Current | 25µA independent of load; minimizes standby drain in always-on portable systems |
| Reset Threshold | 2.08V to 2.28V (−10% of 1.8V); guarantees reset assertion before µP supply violation per JEDEC JESD8-5B |
| Reset Timeout | 100ms minimum; ensures clock oscillator stabilization and memory initialization before processor release |
| MR Input Logic | Active-low with 0.2×VOUT VIL and 0.8×VOUT VIH; compatible with standard CMOS/TTL drivers without level-shifting |
Pinout & Package
MAX6349YPUT is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), with GND serving dual electrical and thermal functions - requires 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 pad | Common return path and primary heat sink; must connect to large copper area for thermal stability |
| 3 MR | Manual reset input | Active-low trigger; internal 20kΩ pullup to OUT eliminates external resistor; 120ns glitch rejection suppresses noise |
| 4 RESET | Open-drain reset output | Active-low signal; sinks 3.2mA at 0.4V max VOL; requires external pullup for µP reset line interface |
| 5 SET | Feedback reference input | Connect to GND for 1.8V preset; connects to resistor divider for adjustable output; 1.23V internal reference |
| 6 OUT | Regulated output | Delivers up to 150mA; bypassed with ≥1µF ceramic capacitor; short-circuit and thermal protected |
Key Features
| Feature | Design Value |
|---|---|
| Integrated manual reset input (MR) | Enables operator-initiated or test-system-triggered reset without external components or debounce circuitry |
| Zero reverse leakage current | Prevents backup battery discharge through IN pin when main supply fails - eliminates need for external blocking diodes |
| 1µF minimum output capacitance | Reduces BOM count and board space vs. legacy regulators requiring ≥10µF; supports X7R/X5R ceramics across full temperature range |
| Thermal shutdown with 20°C hysteresis | Provides self-recovering fault protection during sustained overload; avoids latch-up and enables safe intermittent operation |
| −10% reset threshold tolerance | Matches stringent µP brownout requirements for 1.8V I/O domains; avoids premature reset assertion during transient dips |
Applications
| USB Devices | Cellular Telephones |
|---|---|
Use Scenario: Powering USB peripheral ICs (e.g., USB transceivers, PHYs) from a shared 3.3V rail derived from Li-ion battery via buck converter. IC Role / Device Role / Timing Role: Provides clean, regulated 1.8V supply for USB controller core logic and asserts RESET until VOUT stabilizes post-power-up. Use Value: Eliminates need for discrete reset supervisor and reduces total solution size by integrating regulation + reset in 1.6mm × 2.9mm footprint. | Use Scenario: Supplying baseband processor I/O banks and PMIC-controlled subsystems in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Delivers precise 1.8V rail with guaranteed reset hold time; MR pin allows factory test-mode reset injection without modifying firmware. Use Value: Enables deterministic boot sequencing and field-serviceable hard reset via momentary switch on MR–GND. |
| Palm Top Computers | PCMCIA Cards |
Use Scenario: Powering SRAM, flash memory, and touch controller in handheld PDAs with tight battery life constraints. IC Role / Device Role / Timing Role: Regulates 1.8V supply while monitoring for brownout; RESET output holds CPU in reset during battery sag below 1.62V. Use Value: Prevents data corruption during low-battery operation by enforcing strict voltage-margin reset behavior. | Use Scenario: Providing regulated 1.8V to PCMCIA Type II card controllers and interface logic in laptop expansion slots. IC Role / Device Role / Timing Role: Supplies isolated 1.8V domain and generates compliant reset pulse synchronized to card insertion detection logic. Use Value: Meets PCMCIA 2.1 specification for hot-plug reset timing and eliminates external supervisor IC cost. |
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 |
|---|---|---|---|
| TPS76318QDBVRQ1 | Fixed 1.8V output, 150mA, 120µA IQ, push-pull active-low RESET, no MR input | Lacks manual reset capability; requires external RC network for reset timeout tuning if 100ms is not sufficient | Choose when automotive AEC-Q100 qualification is required and MR functionality is unnecessary |
| ADP3339AKCZ-1.8-R7 | Fixed 1.8V output, 500mA, 90µA IQ, no integrated reset circuit | Requires external supervisor (e.g., ADM6315) for reset generation; higher output current but larger solution size | Choose when higher load current is needed and system-level reset coordination is already implemented |
Compared with TPS76318QDBVRQ1 and ADP3339AKCZ-1.8-R7, the MAX6349YPUT uniquely combines ultra-low 25µA quiescent current, built-in 100ms reset timeout, and MR input - making it optimal for space-constrained, battery-sensitive designs where manual reset and minimal standby drain are critical.
Availability
MAX6349YPUT is available at Aetrix Electronics and suitable for USB devices, cellular telephones, and palm top computers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX6349YPUT 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 in demanding industrial and portable applications.
The MAX6329/MAX6349 product line targets battery-powered systems needing highly integrated, micropower voltage regulation with guaranteed reset timing - specifically addressing design complexity reduction in handheld instrumentation and wireless communication devices.
FAQ
What is the exact reset threshold voltage range for MAX6349YPUT?
The MAX6349YPUT has a fixed −10% reset threshold relative to its 1.8V output, specified as 2.08V to 2.28V (min to max) over temperature and process variation. This threshold is factory-trimmed and does not require external resistor configuration. The MAX6349YPUT uses the same internal reference for both regulation and reset supervision, ensuring tracking between VOUT and VTH.
Does MAX6349YPUT support adjustable output voltage, or is it fixed at 1.8V?
The MAX6349YPUT is configured for fixed +1.8V output - confirmed by its "Y" suffix in the Selector Guide, which denotes 1.8V preset with −10% reset threshold. While the MAX6349 family supports adjustable mode via the SET pin, the YPUT variant requires SET = GND and does not ship with external resistors; using SET for adjustment would invalidate the guaranteed 1.8V accuracy and reset threshold calibration.
What is the function of the MR pin on MAX6349YPUT, and how should it be used?
The MR pin on MAX6349YPUT is an active-low manual reset input that forces RESET assertion regardless of VOUT status. It features a 20kΩ internal pullup to OUT, accepts standard CMOS logic levels, and provides 120ns glitch rejection. To implement hardware reset, connect a normally open momentary switch between MR and GND; no external debounce components are needed due to internal filtering.
Can MAX6349YPUT operate with input voltages below 2.5V?
No - the absolute minimum input voltage for MAX6349YPUT is 2.5V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.5V violates the device's functional operating range and may result in unregulated output, failed reset assertion, or undefined behavior. For sub-2.5V inputs, consider the MAX8867 or similar ultra-low-VIN LDOs.
Is the RESET output of MAX6349YPUT push-pull or open-drain?
The RESET output of MAX6349YPUT is open-drain active-low, as indicated by the "P" suffix in its top-mark code (AAJO per Selector Guide) and confirmed in the Pin Description table. It requires an external pullup resistor to VOUT or another logic-rail voltage. This configuration allows wired-OR reset bus implementation and compatibility with multiple µP reset input types.
MAX6349YPUT 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 (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:
- Manual 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
MAX6349YPUT FAQ
1.How can I place an order for MAX6349YPUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6349YPUT 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 MAX6349YPUT reliable?
The price and inventory of MAX6349YPUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6349YPUT is usually 5 days.
3.What payment methods are accepted for MAX6349YPUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6349YPUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6349YPUT?
MAX6349YPUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6349YPUT 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 MAX6349YPUT?
For technical support, including MAX6349YPUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6349YPUT requirements.
6.How does Aetrix verify that MAX6349YPUT is sourced from the original manufacturer or authorized distributors?
All MAX6349YPUT 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 MAX6349YPUT meets industry standards.
7.What is the process for return or replacement of MAX6349YPUT?
All MAX6349YPUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6349YPUT, 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 MAX6349YPUT part is unused and in its original packaging.
Return procedure for MAX6349YPUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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