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Analog Devices Inc./Maxim Integrated MAX6469TA18AD3+T
- Part No.:
- MAX6469TA18AD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6469TA18AD3+T.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,198
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Product details
Overview
MAX6469TA18AD3+T from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.8V output, -7.5% reset threshold accuracy, and 150ms (min) active-low push-pull reset timeout. It operates from 2.5V to 5.5V input, delivers ±2.0% output voltage accuracy over -40°C to +85°C, and consumes only 82µA quiescent current - ideal for battery-powered handheld instruments and USB devices.
For engineers reviewing the MAX6469TA18AD3+T datasheet, MAX6469TA18AD3+T pinout, MAX6469TA18AD3+T application, or MAX6469TA18AD3+T equivalent, this page provides verified technical context, confirmed pin functions, real-world use cases in portable electronics, and validated alternative options for supply-chain continuity and design flexibility.
Technical Context
The MAX6469TA18AD3+T integrates a precision LDO regulator core and a fully self-contained reset supervisor sharing the same reference. Its regulator uses an internal feedback network to deliver a stable 1.8V output with dropout as low as 55mV at 150mA and 114mV at 300mA, enabling operation near battery end-of-life.
The reset circuit monitors VOUT against a -7.5% threshold (1.665V nominal), asserts active-low RESET within 35µs of undervoltage detection, and holds RESET asserted for ≥150ms after recovery - eliminating need for external supervisors in space-constrained µP systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2.0% over -40°C to +85°C - ensures stable core logic supply for low-voltage microcontrollers. |
| Max Output Current | 300mA guaranteed - sufficient to power ARM Cortex-M0/M3 cores, Bluetooth baseband ICs, or small FPGA I/O banks. |
| Dropout Voltage | 114mV at 300mA load - enables regulation from single-cell Li-ion (3.0V min) down to 2.916V before dropout. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring modes (e.g., PDA standby, USB device suspend). |
| Reset Threshold | -7.5% of 1.8V = 1.665V (min assertion) - aligns with standard µP supply tolerance requirements per JEDEC JESD8-12. |
| Reset Timeout | 150ms minimum - satisfies boot-time stabilization windows for ARM-based SoCs and serial flash initialization. |
| Shutdown Current | 0.1µA typical - reduces system leakage during deep-sleep states without requiring external switch control. |
Pinout & Package
MAX6469TA18AD3+T is housed in an 8-pin TDFN-EP package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad. The package supports high thermal dissipation (1951mW at +70°C) and requires PCB ground-plane connection to EP for optimal junction temperature control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 2.5V–5.5V input; bypass to GND with 0.1µF ceramic capacitor to suppress high-frequency noise. |
| 2 (GND) | Ground / Thermal Heatsink | Primary electrical return path and thermal conduction path; must connect to large copper pour or internal ground plane. |
| 3 (SHDN) | Active-Low Shutdown Control | Pulled high to IN for normal operation; drives <0.1µA in shutdown, reducing total system standby current. |
| 4 (RESET) | Active-Low Push-Pull Reset Output | Drives µP RESET pin directly; sinks 3.2mA at 0.4V - no external pull-up required for most microcontrollers. |
| 5 (SET) | Feedback Reference Input | Internally connected to GND for fixed 1.8V mode; left unconnected or tied to GND - not used in preset configuration. |
| 6 (OUT) | Regulated Output | Delivers 1.8V @ up to 300mA; requires ≥3.3µF low-ESR ceramic output capacitor for stability and transient response. |
| EP | Exposed Thermal Pad | Internally connected to GND; soldered to PCB ground plane to reduce θJA by ~30°C/W and prevent thermal shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated µP Reset Supervisor | Eliminates external supervisor IC and associated BOM cost; guarantees synchronized power-good signaling with regulator output. |
| Low Dropout at Full Load | 114mV dropout at 300mA enables >95% efficiency from 3.0V input - critical for single-cell Li-ion applications. |
| Ultra-Low Quiescent Current | 82µA supply current allows >1-year battery life in 10µA average-current portable devices (e.g., Bluetooth remote). |
| Reverse Current Protection | 0.01µA typical OUT-to-IN leakage prevents backup capacitor discharge into depleted battery - supports seamless switchover. |
| Thermal & Short-Circuit Protection | Auto-recovering thermal shutdown at +180°C and 450mA current limit protect against sustained overload without fuse replacement. |
Applications
| Handheld Instruments | PCMCIA/USB Devices |
|---|---|
Use Scenario: Power management in palm-sized test meters with LCD, ADC, and wireless telemetry. IC Role / Device Role / Timing Role: Primary 1.8V core supply for MCU and sensor interface; reset signal synchronizes boot sequence after battery insertion. Use Value: 82µA quiescent current extends alkaline battery life to >18 months in storage; 150ms reset timeout ensures reliable flash memory initialization. |
Use Scenario: Compact USB audio adapter requiring clean 1.8V for DAC and USB PHY logic. IC Role / Device Role / Timing Role: Regulator and supervisor for bus-powered peripheral; SHDN pin enables host-controlled power gating. Use Value: Push-pull RESET eliminates need for external pull-up resistor, saving board area and BOM count in 12mm × 12mm form factor. |
| Cellular Telephones | Digital Cameras |
Use Scenario: Baseband processor power rail in feature phones with removable Li-ion battery. IC Role / Device Role / Timing Role: LDO supplies 1.8V to RF transceiver IC; RESET asserts during brownout to prevent corrupted call setup. Use Value: -7.5% reset threshold matches GSM power integrity spec; 55mV dropout at 150mA maintains regulation during peak transmit bursts. |
Use Scenario: Image sensor and ISP core voltage in compact point-and-shoot cameras. IC Role / Device Role / Timing Role: Stable 1.8V rail for CMOS image sensor digital backend; RESET coordinates sensor initialization with main SoC boot. Use Value: ±2.0% output accuracy prevents pixel clock jitter; TDFN-EP package fits under lens barrel in <10mm height constraint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76318QDBVRQ1 | 150mA max output, 120µA IQ, open-drain RESET, no SHDN pin | Limited to lower-current peripherals; requires external pull-up on RESET; lacks shutdown control | Select when 150mA suffices and automotive AEC-Q100 qualification is mandatory. |
| AP7361D-18SG-7 | No integrated reset; 300mA output, 60µA IQ, ±2% accuracy, SOT-23-5 | Requires external reset IC (e.g., MAX809) and additional passives - increases footprint and BOM cost | Select when board space permits discrete supervision and lowest possible quiescent current is critical. |
Compared with MAX6469TA18AD3+T, TPS76318QDBVRQ1 trades 150mA output and automotive qualification for missing shutdown control and reduced integration, while AP7361D-18SG-7 offers lower IQ but forces designers to add external reset components - making MAX6469TA18AD3+T the optimal balance of current capability, integration, and battery-life optimization in space-constrained portable designs.
Availability
MAX6469TA18AD3+T is available at Aetrix Electronics and suitable for handheld instruments, PCMCIA/USB devices, and cellular telephones requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6469TA18AD3+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX6469–MAX6484 product line was designed specifically for battery-powered portable electronics needing tightly integrated power regulation and microprocessor supervision in minimal footprint - addressing demand for reduced BOM count and extended runtime.
FAQ
What is the exact output voltage tolerance of MAX6469TA18AD3+T over temperature?
The MAX6469TA18AD3+T guarantees ±2.0% output voltage accuracy across the full operating temperature range of -40°C to +85°C. This specification is confirmed in the Electrical Characteristics table under "Output Voltage Accuracy (Fixed Output Voltage Operation)" for MAX6469–MAX6476 devices, with 1mA ≤ IOUT ≤ 300mA loading conditions.
Does MAX6469TA18AD3+T support active-low push-pull or open-drain RESET output?
MAX6469TA18AD3+T features an active-low push-pull RESET output. This is confirmed by its part number suffix "D3", which maps to the Reset Timeout Delay Guide as 150ms (min) and corresponds to push-pull configuration per the Pin Configurations section and Ordering Information table.
What is the minimum input voltage required for MAX6469TA18AD3+T to maintain regulation at 300mA?
At 300mA load, MAX6469TA18AD3+T requires VIN ≥ VOUT + ∆VDO = 1.8V + 114mV = 1.914V minimum. However, the Absolute Maximum Ratings specify VIN ≥ 2.5V for guaranteed operation, and the Electrical Characteristics table conditions require VIN = (VOUT + 0.5V) or +2.5V - so 2.5V is the practical minimum input for full-spec compliance.
Can MAX6469TA18AD3+T be used with a remote sense configuration?
No. MAX6469TA18AD3+T does not support remote sensing. Remote feedback (FB pin) is only available on MAX6475/MAX6476/MAX6483/MAX6484 variants. MAX6469TA18AD3+T uses the SET pin internally tied for fixed 1.8V operation and lacks FB functionality - confirmed in the Pin Description table for MAX6469/MAX6470.
What thermal protection behavior does MAX6469TA18AD3+T exhibit under sustained overload?
Under sustained thermal overload, MAX6469TA18AD3+T activates thermal shutdown at +180°C (typ), turning off the pass transistor. It remains latched off until junction temperature falls by 20°C (hysteresis), then resumes regulation - resulting in pulsed output during continuous overload. This protects the IC without requiring external intervention or latch-off circuitry.
MAX6469TA18AD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V (1.8V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 136 µA
- Current - Supply (Max):
- 96 µA
- PSRR:
- -
- Control Features:
- Reset, Shutdown
- 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:
- 8-TDFN (3x3)
MAX6469TA18AD3+T FAQ
1.How can I place an order for MAX6469TA18AD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6469TA18AD3+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 MAX6469TA18AD3+T reliable?
The price and inventory of MAX6469TA18AD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6469TA18AD3+T is usually 5 days.
3.What payment methods are accepted for MAX6469TA18AD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6469TA18AD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6469TA18AD3+T?
MAX6469TA18AD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6469TA18AD3+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 MAX6469TA18AD3+T?
For technical support, including MAX6469TA18AD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6469TA18AD3+T requirements.
6.How does Aetrix verify that MAX6469TA18AD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6469TA18AD3+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 MAX6469TA18AD3+T meets industry standards.
7.What is the process for return or replacement of MAX6469TA18AD3+T?
All MAX6469TA18AD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6469TA18AD3+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 MAX6469TA18AD3+T part is unused and in its original packaging.
Return procedure for MAX6469TA18AD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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