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Analog Devices Inc./Maxim Integrated MAX6469TA25BD3+
- Part No.:
- MAX6469TA25BD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6469TA25BD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,265
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Product details
Overview
MAX6469TA25BD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, preset 2.5V output, -7.5% reset threshold, and 150ms minimum reset timeout. It features 82µA quiescent current, 114mV dropout at full load, and active-low open-drain RESET output. Designed for battery-powered portable electronics requiring precise voltage regulation and reliable power-on reset sequencing.
For engineers reviewing the MAX6469TA25BD3+ datasheet, MAX6469TA25BD3+ pinout, MAX6469TA25BD3+ application, or MAX6469TA25BD3+ equivalent, key selection criteria include its fixed 2.5V output, TDFN-8 EP package, shutdown capability (0.1µA), ±2.0% output accuracy over temperature, and compatibility with microprocessor supply tolerance monitoring in space-constrained embedded systems.
Technical Context
The MAX6469TA25BD3+ 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 with guaranteed 450mA current limit, and maintains ±2.0% output accuracy across -40°C to +85°C. The reset circuit monitors VOUT against a -7.5% threshold and asserts an active-low open-drain RESET signal for ≥150ms after recovery.
This device belongs to the MAX6469–MAX6484 family variant with SHDN control (not MR or FB), fixed-output configuration (SET tied to GND), and TDFN-8 EP packaging. It includes thermal shutdown at +180°C, reverse current protection (0.01µA OUT→IN leakage), and undervoltage lockout at 2.25V (falling).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2.0% over -40°C to +85°C - ensures stable core logic supply for 2.5V microcontrollers and peripherals. |
| Max Output Current | 300mA guaranteed - sufficient for mid-power SoCs, RF modules, and sensor subsystems in portable devices. |
| Dropout Voltage | 114mV at 300mA - enables operation down to VIN = 2.614V, critical for single-cell Li-ion or 3× alkaline battery systems. |
| Quiescent Current | 82µA typical - minimizes standby drain in always-on battery applications like Bluetooth modules or smart sensors. |
| Reset Threshold | -7.5% of VOUT (i.e., 2.3125V) - matches standard microprocessor supply tolerance requirements without external supervision. |
| Reset Timeout | 150ms minimum - provides adequate stabilization time for clock oscillators and memory initialization before processor release. |
| Shutdown Current | 0.1µA typical - enables ultra-low-power sleep states in handheld instruments and USB peripherals. |
| Input Range | 2.5V to 5.5V - supports direct connection to common battery chemistries and intermediate DC-DC outputs. |
Pinout & Package
MAX6469TA25BD3+ 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 capacitor to GND for stability and noise rejection. |
| 2 (GND) | Ground / Thermal Pad | Primary electrical return and thermal path; must be connected to large copper area for heat dissipation. |
| 3 (SHDN) | Active-Low Shutdown Control | Pull low to disable regulator and reduce supply current to 0.1µA; tie to IN for normal operation. |
| 4 (RESET) | Active-Low Open-Drain Reset Output | Asserts low during power-up, brownout, or shutdown; requires external pullup for µP reset interface. |
| 5 (SET) | Feedback Reference Input | Tied to GND for fixed 2.5V output; not used in adjustable mode for this variant. |
| 6 (OUT) | Regulated Output | Delivers 2.5V/300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for transient response and stability. |
| 7, 8 (EP) | Exposed Paddle | Internally connected to GND; must be soldered to PCB ground plane to achieve specified thermal resistance (41°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Microprocessor Reset | Eliminates need for external supervisor IC by providing factory-trimmed -7.5% VOUT threshold and 150ms timeout. |
| Low Dropout Performance | 114mV at 300mA enables >95% efficiency at light loads and extends battery runtime in 2.5V systems. |
| Ultra-Low Quiescent Current | 82µA operating / 0.1µA shutdown reduces average system current in duty-cycled portable equipment. |
| Robust Protection Suite | Includes thermal shutdown (+180°C), short-circuit current limit (450mA min), and reverse current blocking (0.01µA). |
| High Accuracy Over Temperature | ±2.0% output tolerance from -40°C to +85°C ensures reliable operation in industrial and automotive-adjacent environments. |
| Small Footprint Packaging | 3mm × 3mm TDFN-EP saves board space vs. SOT23-6 while improving thermal performance for high-current density layouts. |
Applications
| Handheld Instruments | PCMCIA / USB Devices |
|---|---|
|
Use Scenario: Power management in palm-sized test meters and data loggers with intermittent wireless transmission. IC Role / Device Role: Primary 2.5V LDO supplying microcontroller, ADC, and BLE radio; RESET ensures clean boot after battery insertion or wake-up. Use Value: 82µA quiescent current extends shelf life; 150ms reset timeout guarantees oscillator stabilization before firmware execution. |
Use Scenario: Compact peripheral cards requiring regulated 2.5V for FPGA configuration and USB PHY interface. IC Role / Device Role: Local point-of-load regulator with integrated reset signaling to host controller upon hot-plug detection. Use Value: TDFN-8 footprint fits tight card-edge layouts; open-drain RESET interfaces directly with 3.3V host GPIO without level-shifting. |
| Cellular Telephones | Digital Cameras |
|
Use Scenario: Baseband processor auxiliary rail in dual-SIM feature phones with aggressive power cycling. IC Role / Device Role: Secondary 2.5V supply enabling fast wake/sleep transitions; SHDN pin synchronizes with PMIC sleep commands. Use Value: 0.1µA shutdown current prevents battery drain during standby; -7.5% reset threshold aligns with 3GPP power-good timing specs. |
Use Scenario: Image sensor and ISP core voltage in compact digital still cameras with burst-mode capture. IC Role / Device Role: Stable 2.5V source for high-speed pixel readout circuits; RESET prevents corrupted frame buffers during power ramp. Use Value: 114mV dropout allows operation down to 2.614V, supporting aging alkaline batteries; ±2.0% accuracy avoids sensor gain calibration drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76325DBVR | 250mA output, 120mV dropout at 250mA, no integrated reset, 85µA IQ | Requires external reset IC (e.g., TPS3809) for µP supervision; lacks SHDN pin | Choose when reset functionality is handled separately and lower cost is prioritized over integration. |
| ADP160ACBZ-2.5-R7 | 150mA output, 105mV dropout at 150mA, no reset, 570nA IQ (ultra-low), 5-lead TSOT | Insufficient current for 300mA loads; no reset or shutdown; suited only for ultra-low-power sub-circuits | Choose only for <150mA sensor rails where nanoscale quiescent current outweighs integration needs. |
Compared with MAX6469TA25BD3+, TPS76325DBVR offers lower cost but requires additional components and layout area for reset functionality, while ADP160ACBZ-2.5-R7 sacrifices 50% output current and all supervision features to achieve sub-µA standby - making MAX6469TA25BD3+ the optimal choice for integrated 300mA/2.5V/reset designs in portable equipment.
Availability
MAX6469TA25BD3+ 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 MAX6469TA25BD3+ 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, communications, and consumer markets.
The MAX6469–MAX6484 product line was designed specifically for battery-powered portable electronics needing tightly integrated voltage regulation and microprocessor reset supervision in minimal footprint packages.
FAQ
What is the output voltage and tolerance of the MAX6469TA25BD3+?
The MAX6469TA25BD3+ delivers a fixed 2.5V output with ±2.0% accuracy over the full operating temperature range (-40°C to +85°C). This tolerance is guaranteed across load currents from 1mA to 300mA and ensures compatibility with 2.5V microcontrollers, FPGAs, and analog front-ends without requiring external trimming or feedback adjustment.
Does the MAX6469TA25BD3+ include a shutdown function?
Yes, the MAX6469TA25BD3+ includes an active-low SHDN pin that reduces supply current to 0.1µA (typical) when asserted. This feature enables deep-sleep modes in portable devices. During shutdown, the pass transistor, reference, and control circuitry are disabled, and RESET remains asserted until both SHDN is deasserted and VOUT recovers above the -7.5% threshold.
What is the reset timeout period and threshold for the MAX6469TA25BD3+?
The MAX6469TA25BD3+ has a reset timeout period of 150ms (minimum) and a reset threshold of -7.5% of nominal VOUT (i.e., 2.3125V). The reset output remains low for at least 150ms after VOUT rises above this threshold, ensuring sufficient time for clock oscillators and memory to stabilize before releasing the microprocessor from reset.
Which package type does the MAX6469TA25BD3+ use, and what are its thermal characteristics?
The MAX6469TA25BD3+ uses an 8-pin TDFN-EP (3mm × 3mm) package with exposed paddle. Its junction-to-board thermal resistance (θJB) is 41°C/W, enabling continuous 300mA operation at ambient temperatures up to +70°C when the EP is properly soldered to a ≥100mm² PCB ground plane. Derating begins above +70°C at 24.4mW/°C.
Can the MAX6469TA25BD3+ be used with a 2.5V input supply?
No - the MAX6469TA25BD3+ requires a minimum input voltage of 2.5V, but due to its 114mV dropout at 300mA, it cannot regulate 2.5V output from a 2.5V input. The absolute minimum input is 2.614V under full load. For 2.5V input operation, a lower-dropout device such as the MAX1725 (60mV at 300mA) would be required, though it lacks integrated reset.
MAX6469TA25BD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Bulk
- 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 (2.5V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.25V @ 300mA
- 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)
MAX6469TA25BD3+ FAQ
1.How can I place an order for MAX6469TA25BD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6469TA25BD3+ 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 MAX6469TA25BD3+ reliable?
The price and inventory of MAX6469TA25BD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6469TA25BD3+ is usually 5 days.
3.What payment methods are accepted for MAX6469TA25BD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6469TA25BD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6469TA25BD3+?
MAX6469TA25BD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6469TA25BD3+ 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 MAX6469TA25BD3+?
For technical support, including MAX6469TA25BD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6469TA25BD3+ requirements.
6.How does Aetrix verify that MAX6469TA25BD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6469TA25BD3+ 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 MAX6469TA25BD3+ meets industry standards.
7.What is the process for return or replacement of MAX6469TA25BD3+?
All MAX6469TA25BD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6469TA25BD3+, 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 MAX6469TA25BD3+ part is unused and in its original packaging.
Return procedure for MAX6469TA25BD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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