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Analog Devices Inc./Maxim Integrated MAX6469UT28AD3
- Part No.:
- MAX6469UT28AD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX6469UT28AD3.pdf
- Description:
- IC REG LINEAR LDO WITH MPU RESET
- Quantity:
- Payment:
- Shipping:
Inventory:4,985
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Product details
Overview
MAX6469UT28AD3 from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, delivering a fixed +2.8V output, ±2.7% accuracy over -40°C to +85°C, 114mV dropout at 300mA load, and active-low push-pull RESET with 150ms timeout. It serves as primary power and supervision IC for battery-powered microprocessor systems requiring stable voltage and reliable power-on reset.
For engineers reviewing the MAX6469UT28AD3 datasheet, MAX6469UT28AD3 pinout, MAX6469UT28AD3 application, or MAX6469UT28AD3 equivalent, this device is selected for portable embedded designs where ultra-low quiescent current (82µA), shutdown capability (0.1µA), and integrated reset eliminate external supervisors while meeting tight voltage tolerance and timing requirements.
Technical Context
The MAX6469UT28AD3 integrates a precision LDO regulator core and a fully self-contained reset supervisor sharing the same reference. Its regulator operates from 2.5V to 5.5V input, delivers up to 300mA, and maintains ±2.7% output accuracy across temperature and load. The reset circuit monitors VOUT directly and asserts active-low RESET when output falls below −7.5% of nominal (i.e., <2.61V for 2.8V output) for ≥150ms minimum timeout.
This part belongs to the MAX6469–MAX6476 subgroup: it features SHDN input (active-low shutdown), SET pin for adjustable/fixed mode selection, no MR input, and no FB pin-confirming its fixed-output, non-remote-sense, non-manual-reset configuration. Pinout matches SOT23-6 package with IN, GND, SHDN, RESET, SET, and OUT terminals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +2.8V fixed - precisely set by internal resistor divider; no external components required for nominal operation. |
| Output Accuracy | ±2.7% over −40°C to +85°C - ensures microprocessor supply remains within JEDEC-compliant tolerance bands across industrial temperature range. |
| Dropout Voltage | 114mV at 300mA - enables regulation from 2.914V input, critical for single-cell Li-ion or 3-cell alkaline battery systems near end-of-life. |
| Supply Current | 82µA typical - minimizes battery drain in always-on portable devices; drops to 0.1µA in shutdown mode. |
| Reset Threshold | −7.5% of VOUT (2.61V) - guarantees reset assertion before microprocessor supply violates −5% to −10% specification window. |
| Reset Timeout | 150ms minimum - satisfies boot-time stabilization requirements for clock oscillators and memory initialization in embedded controllers. |
| Input Voltage Range | 2.5V to 5.5V - supports wide battery chemistries including Li-ion, Li-Poly, and multi-cell alkaline without external pre-regulation. |
Pinout & Package
MAX6469UT28AD3 is packaged in a 6-pin SOT23-6 surface-mount package with exposed paddle (internally connected to GND). Thermal performance is optimized when the exposed paddle is soldered to a PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.5V–5.5V unregulated supply; requires 0.1µF ceramic bypass capacitor to GND for stability. |
| 2 (GND) | Ground / thermal pad | Primary electrical return and thermal dissipation path; must be connected to large copper area for safe 300mA operation. |
| 3 (SHDN) | Active-low shutdown control | Pulling low disables regulator and reduces supply current to 0.1µA; connect to VIN for normal operation. |
| 4 (RESET) | Active-low push-pull reset output | Asserts low during power-up, brownout, or shutdown; holds low for ≥150ms after VOUT stabilizes above 2.61V. |
| 5 (SET) | Feedback select input | Connected to GND to enable fixed +2.8V output; floating or externally biased for adjustable mode (not used here). |
| 6 (OUT) | Regulated output | Delivers up to 300mA at +2.8V; requires ≥3.3µF low-ESR ceramic capacitor to GND for loop stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated microprocessor reset | Eliminates need for discrete supervisor IC; RESET timing and threshold are factory-trimmed and temperature-compensated. |
| Ultra-low quiescent current | 82µA operating / 0.1µA shutdown - extends battery life in always-on handheld instruments and wireless modules. |
| Low dropout architecture | 55mV @150mA, 114mV @300mA - enables high-efficiency regulation from marginal input sources like aging batteries. |
| Reverse current protection | 0.01µA typ OUT-to-IN leakage - prevents back-powering of source during battery swap or backup-supply scenarios. |
| Thermal & short-circuit protection | 180°C thermal shutdown with 20°C hysteresis; 450mA current limit - ensures robustness under fault conditions without external components. |
Applications
| Handheld Instruments | PCMCIA/USB Devices |
|---|---|
Use Scenario: Power management in palm-sized test meters with LCD, ADC, and Bluetooth connectivity. IC Role / Device Role / Timing Role: Primary 2.8V supply and power-on reset generator for ARM Cortex-M0 MCU and analog front-end. Use Value: 82µA quiescent current extends AA-battery runtime beyond 12 months in sleep mode; 150ms RESET ensures clean boot after cold start. |
Use Scenario: Compact USB-powered peripheral card requiring regulated 2.8V for flash memory and interface logic. IC Role / Device Role / Timing Role: Single-chip LDO + reset solution replacing dual-component design on space-constrained PCMCIA board. Use Value: SOT23-6 footprint saves >3mm² vs. discrete LDO + supervisor; 114mV dropout allows operation down to 2.914V from USB 3.0's 3.3V rail. |
| Cellular Telephones | Digital Cameras |
Use Scenario: Baseband processor power rail in feature phones using dual-cell alkaline batteries. IC Role / Device Role / Timing Role: Main 2.8V LDO with integrated reset for TI OMAP-like baseband SoC requiring precise POR timing. Use Value: −7.5% reset threshold (2.61V) aligns with GSM baseband voltage tolerance; shutdown mode cuts standby current to sub-µA level. |
Use Scenario: Image sensor and ISP core supply in compact digital still cameras with auto-focus and video capture. IC Role / Device Role / Timing Role: Stable 2.8V rail for CMOS image sensor and low-noise analog signal chain, synchronized with system reset. Use Value: 75µVRMS noise not applicable (MAX6469 is non-UCSP), but 0.2% load regulation ensures consistent sensor bias across zoom motor load transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76328DBVR | 250mA output, 120mV dropout @250mA, no integrated reset - requires external supervisor (e.g., TPS3809K33). | Lacks monolithic reset function; adds BOM count, layout area, and timing coordination complexity. | Select when cost sensitivity outweighs integration benefit and existing design already uses discrete reset IC. |
| ADM6315-28ARTZ-RL | Standalone reset IC only (no LDO); 2.8V threshold, 200ms timeout; requires external LDO (e.g., ADM7172). | Two-chip solution increases total solution size and power path inductance; no shared reference between LDO and reset. | Select when system requires independent reset timing adjustment or separate LDO optimization (e.g., higher PSRR). |
Compared with TPS76328DBVR and ADM6315-28ARTZ-RL, MAX6469UT28AD3 provides true single-chip integration of regulation and reset with matched reference, eliminating inter-component drift and reducing PCB area by >40% in space-constrained portable designs.
Availability
MAX6469UT28AD3 is available at Aetrix Electronics and suitable for handheld instruments, PCMCIA/USB peripherals, and cellular telephone designs requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.
Supply support for MAX6469UT28AD3 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 solutions for industrial, automotive, and consumer applications.
MAX6469UT28AD3 belongs to the MAX6469–MAX6484 family of integrated LDO + reset regulators designed specifically for battery-powered portable electronics where space, power efficiency, and reliable power sequencing are critical.
FAQ
What is the exact output voltage and tolerance of the MAX6469UT28AD3?
The MAX6469UT28AD3 delivers a fixed +2.8V output with ±2.7% accuracy over the full −40°C to +85°C operating temperature range and 1mA–300mA load current. This tolerance is guaranteed by production testing and correlation, ensuring compatibility with microprocessors specifying ±5% supply rails.
Does the MAX6469UT28AD3 include a manual reset input (MR)?
No, the MAX6469UT28AD3 does not include a manual reset input. It belongs to the MAX6469/MAX6470/MAX6473–MAX6478/MAX6481–MAX6484 subgroup, which features SHDN and SET pins but omits MR functionality. Manual reset capability is only present in MAX6471–MAX6474 and MAX6479–MAX6482 variants.
What is the reset timeout period configured for the MAX6469UT28AD3?
The suffix "D3" in MAX6469UT28AD3 specifies a 150ms minimum reset timeout period. This value is factory-programmed and guaranteed across temperature; the RESET output remains asserted for ≥150ms after VOUT rises above the −7.5% threshold (2.61V) during power-up or recovery.
Can the MAX6469UT28AD3 be used with an adjustable output voltage?
Yes, the MAX6469UT28AD3 supports adjustable output via the SET pin. Though shipped configured for +2.8V (SET = GND), connecting SET to an external resistor divider enables outputs from 1.25V to 5.0V using VOUT = 1.229V × (1 + R1/R2). However, doing so invalidates the ±2.7% fixed-voltage accuracy guarantee.
What package type and thermal characteristics apply to the MAX6469UT28AD3?
The MAX6469UT28AD3 uses a 6-pin SOT23-6 package with exposed thermal pad. At TA = +70°C, its continuous power dissipation is 727mW, derating at 9.1mW/°C above that. For reliable 300mA operation, the GND pad must be soldered to a ≥100mm² PCB ground plane to maintain junction temperature below +150°C.
MAX6469UT28AD3 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):
- 1.2V (2.8V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.21V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 136 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Manual Reset, Reset
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6469UT28AD3 FAQ
1.How can I place an order for MAX6469UT28AD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6469UT28AD3 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 MAX6469UT28AD3 reliable?
The price and inventory of MAX6469UT28AD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6469UT28AD3 is usually 5 days.
3.What payment methods are accepted for MAX6469UT28AD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6469UT28AD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6469UT28AD3?
MAX6469UT28AD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6469UT28AD3 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 MAX6469UT28AD3?
For technical support, including MAX6469UT28AD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6469UT28AD3 requirements.
6.How does Aetrix verify that MAX6469UT28AD3 is sourced from the original manufacturer or authorized distributors?
All MAX6469UT28AD3 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 MAX6469UT28AD3 meets industry standards.
7.What is the process for return or replacement of MAX6469UT28AD3?
All MAX6469UT28AD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6469UT28AD3, 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 MAX6469UT28AD3 part is unused and in its original packaging.
Return procedure for MAX6469UT28AD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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