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Analog Devices Inc./Maxim Integrated MAX6469TA18AD3+
- Part No.:
- MAX6469TA18AD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6469TA18AD3+.pdf
- Description:
- IC REG LINEAR LDO 300MA
- Quantity:
- Payment:
- Shipping:
Inventory:1,331
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Product details
Overview
MAX6469TA18AD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.8V output, ±2.0% accuracy over -40°C to +85°C, 82µA quiescent current, and 150ms minimum reset timeout. It features active-low push-pull RESET, shutdown control (0.1µA standby), and operates from 2.5V to 5.5V input - ideal for battery-powered portable systems requiring reliable power sequencing and brownout protection.
For engineers reviewing the MAX6469TA18AD3+ datasheet, MAX6469TA18AD3+ pinout, MAX6469TA18AD3+ application, or MAX6469TA18AD3+ equivalent, key selection criteria include its 150ms reset timeout, 1.8V fixed output with ±2.0% tolerance, TDFN-8 EP package thermal performance, shutdown functionality, and compatibility with microprocessor supply stabilization in space-constrained handheld and wireless devices.
Technical Context
The MAX6469TA18AD3+ integrates a precision LDO regulator core and a fully self-contained reset supervisor sharing the same voltage reference. Its regulator uses a PMOS pass device enabling ultra-low dropout (55mV at 150mA) and reverse current blocking (0.01µA OUT→IN leakage). The reset circuit monitors VOUT against a -7.5% threshold (A-suffix) and asserts active-low RESET for ≥150ms after recovery.
This variant belongs to the MAX6469–MAX6470 subfamily: it includes SHDN (pin 3) but no MR input, uses SET (pin 5) for fixed-output mode (tied to GND), and delivers guaranteed 300mA output with thermal shutdown at +180°C and current limit at 450mA (min).
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 1.8V microcontrollers and FPGAs. |
| Max Output Current | 300mA guaranteed - sufficient for mid-power SoCs, Bluetooth modules, and USB peripherals without external boost. |
| Dropout Voltage | 55mV at 150mA load - enables operation down to VIN = 1.855V, critical for single-cell Li-ion or alkaline battery longevity. |
| Quiescent Current | 82µA typical - minimizes battery drain during sleep modes; drops to 0.1µA in shutdown. |
| Reset Threshold | -7.5% of nominal VOUT (1.665V) - meets standard microprocessor supply tolerance requirements for clean boot. |
| Reset Timeout | 150ms minimum - provides adequate time for clock oscillators and memory initialization before processor release. |
| Input Voltage Range | 2.5V to 5.5V - supports wide-input battery and adapter sources while maintaining regulation at end-of-discharge. |
Pinout & Package
MAX6469TA18AD3+ is housed in an 8-pin TDFN-EP (3mm × 3mm) package with exposed paddle (EP) internally connected to GND. Thermal performance is optimized by soldering EP to a large PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 2.5V–5.5V supply; requires 0.1µF bypass to GND for stability and noise rejection. |
| 2 (GND) | Ground / Thermal Pad | Primary return path and thermal conduction node; must be connected to large copper area for 1951mW max dissipation. |
| 3 (SHDN) | Active-Low Shutdown Control | Pulling low disables regulator and reduces supply current to ≤1µA; tied to VIN for normal operation. |
| 4 (RESET) | Active-Low Push-Pull Reset Output | Asserts low during power-up, brownout, or shutdown; remains low ≥150ms after VOUT recovers - directly drives µP RESET pin. |
| 5 (SET) | Feedback Reference Input | Tied to GND to select fixed 1.8V output; floating or externally biased for adjustable mode (not used in this variant). |
| 6 (OUT) | Regulated Output | Delivers 1.8V/300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for transient response and stability. |
| 7, 8 (EP) | Exposed Thermal Paddle | Internally connected to GND; not electrically functional as signal pin - sole purpose is thermal conduction to PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Microprocessor Reset | Eliminates need for external supervisor IC - reduces BOM count and board area in portable designs. |
| Ultra-Low Quiescent Current | 82µA operating / 0.1µA shutdown - extends battery life in always-on sensor nodes and wearables. |
| Reverse Current Protection | 0.01µA typical OUT→IN leakage - prevents backup capacitor or supercap discharge into depleted battery. |
| Thermal & Short-Circuit Protection | Auto-recovering shutdown at +180°C junction temp and 450mA current limit - ensures robustness under fault conditions. |
| Low Dropout Architecture | 55mV at 150mA - enables >97% efficiency at light loads and extends usable battery voltage range. |
Applications
| Handheld Instruments | Bluetooth Modules |
|---|---|
|
Use Scenario: Powering ARM Cortex-M based data loggers in field-deployed PDAs with single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary 1.8V core supply and power-on reset sequencer ensuring deterministic boot before ADC sampling begins. Use Value: 150ms reset timeout guarantees crystal oscillator stabilization; 55mV dropout preserves runtime down to 1.85V battery voltage. |
Use Scenario: Supplying baseband processor and RF transceiver in compact BLE 5.0 modules with tight thermal constraints. IC Role / Device Role / Timing Role: Dual-function LDO + reset generator - replaces discrete supervisor + regulator pair in 3×3mm footprint. Use Value: TDFN-EP package enables high-power-density layout; 82µA IQ minimizes idle current in advertising interval sleep states. |
| Notebook Subsystems | USB Peripheral Devices |
|
Use Scenario: Providing dedicated 1.8V rail for embedded controller (EC) and touchpad interface in ultrabook platforms. IC Role / Device Role / Timing Role: Independent reset source synchronized to EC power domain - isolates EC boot from main CPU power sequencing. Use Value: -7.5% reset threshold matches JEDEC JESD8-12A spec; SHDN allows EC-initiated power gating during suspend-to-RAM. |
Use Scenario: Regulating and supervising power for USB-C audio adapters with integrated DAC and headphone amp. IC Role / Device Role / Timing Role: Single-chip solution delivering clean 1.8V analog/digital supply and asserting reset until VOUT settles within tolerance. Use Value: 75µVRMS output noise (typ) prevents audible artifacts; push-pull RESET eliminates need for external pull-up resistor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79918YZTT | 1.8V fixed, 200mA, 2.7–6.5V input, no integrated reset - requires external supervisor (e.g., TPS3808G18). | Lacks built-in reset; suitable only where board space permits separate supervisor or system-level reset is handled elsewhere. | Select when lower cost and simpler qualification outweigh integration benefits; verify external reset timing matches 150ms requirement. |
| ADM6315-29ARTZ-RL7 | 2.93V reset-only IC with 1.8V LDO option (ADM6315-18ARTZ), but LDO rated only for 150mA and lacks shutdown. | Split-function architecture increases component count; no SHDN pin limits low-power mode flexibility. | Choose only if legacy design mandates pin-compatible replacement of ADM6315 series; not recommended for new designs targeting <100µA IQ. |
Compared with TPS79918YZTT and ADM6315-18ARTZ, MAX6469TA18AD3+ uniquely combines 300mA drive, 150ms programmable reset, 0.1µA shutdown, and TDFN thermal performance in one die - reducing total solution size by ≥40% and eliminating timing coordination between discrete LDO and supervisor.
Availability
MAX6469TA18AD3+ is available at Aetrix Electronics and suitable for handheld instruments, Bluetooth modules, and USB peripheral devices requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for MAX6469TA18AD3+ 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.
MAX6469TA18AD3+ belongs to the MAX6469–MAX6484 family of integrated LDO + reset regulators designed specifically for space- and power-constrained portable electronics requiring guaranteed power sequencing and battery longevity.
FAQ
What is the reset timeout period for MAX6469TA18AD3+?
The MAX6469TA18AD3+ has a 150ms minimum reset timeout period (D3 suffix), meaning RESET remains asserted for at least 150ms after VOUT rises above the -7.5% threshold (1.665V). This duration is factory-programmed and non-adjustable. The actual timeout may extend slightly due to process variation, but the minimum guarantee ensures reliable microprocessor initialization across temperature and voltage corners.
Does MAX6469TA18AD3+ support adjustable output voltage?
No, MAX6469TA18AD3+ is configured for fixed 1.8V output. Its SET pin is internally connected to the feedback network for preset operation; tying SET to GND activates the 1.8V mode. Adjustable output requires variants like MAX6469UT18AD3+, which use SOT23-6 and external resistor dividers - the TA suffix denotes TDFN-8 packaging and fixed-voltage configuration.
What package type does MAX6469TA18AD3+ use, and how should the exposed pad be handled?
MAX6469TA18AD3+ uses an 8-pin TDFN-EP (3mm × 3mm) package with exposed paddle (EP). The EP is internally connected to GND and must be soldered to a large PCB ground plane to achieve specified thermal performance (1951mW max dissipation at +70°C). Do not use EP as a signal connection - its sole function is thermal conduction.
Can MAX6469TA18AD3+ be used with a backup supercapacitor on the output?
Yes, MAX6469TA18AD3+ supports backup operation: when IN is removed, OUT can hold up system rails via a supercapacitor. Reverse OUT→IN leakage is only 0.01µA (typ), preventing capacitor discharge into a depleted battery. During backup, RESET asserts to signal power loss, and SHDN must remain high (>0.7×VOUT) to maintain internal bias - verified in battery backup application circuits (Figure 3).
What protection features are integrated into MAX6469TA18AD3+?
MAX6469TA18AD3+ integrates thermal shutdown (+180°C trip, +160°C hysteresis), short-circuit current limiting (450mA min), reverse current blocking (0.01µA OUT→IN), and input undervoltage lockout (2.25V falling). These protections operate autonomously without external components, ensuring safe operation during faults, hot-plug events, or battery reversal - critical for unattended portable deployments.
MAX6469TA18AD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- 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 (1.8V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- -
- 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:
- 8-TDFN (3x3)
MAX6469TA18AD3+ FAQ
1.How can I place an order for MAX6469TA18AD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6469TA18AD3+ 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+ reliable?
The price and inventory of MAX6469TA18AD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6469TA18AD3+ is usually 5 days.
3.What payment methods are accepted for MAX6469TA18AD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6469TA18AD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6469TA18AD3+?
MAX6469TA18AD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6469TA18AD3+ 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+?
For technical support, including MAX6469TA18AD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6469TA18AD3+ requirements.
6.How does Aetrix verify that MAX6469TA18AD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6469TA18AD3+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6469TA18AD3+?
All MAX6469TA18AD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6469TA18AD3+, 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+ part is unused and in its original packaging.
Return procedure for MAX6469TA18AD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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