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Analog Devices Inc./Maxim Integrated MAX6469TA25BD3+T
- Part No.:
- MAX6469TA25BD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6469TA25BD3+T.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,946
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Product details
Overview
MAX6469TA25BD3+T from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, preset +2.5V output, -7.5% reset threshold, 150ms minimum reset timeout, and active-low push-pull RESET output. It operates from 2.5V to 5.5V input, delivers ±2.0% output accuracy over -40°C to +85°C, and consumes only 82µA quiescent current - ideal for battery-powered handheld instruments and USB peripherals.
For engineers reviewing the MAX6469TA25BD3+T datasheet, MAX6469TA25BD3+T pinout, MAX6469TA25BD3+T application, or MAX6469TA25BD3+T equivalent, key selection criteria include guaranteed 300mA load capability at low dropout (114mV @ 300mA), shutdown current of 0.1µA (typ), integrated reset supervision with manual reset compatibility, and TDFN-EP package thermal performance.
Technical Context
The MAX6469TA25BD3+T integrates a precision LDO regulator core with a fully self-contained reset supervisor using a shared bandgap reference. Its regulator employs a PMOS pass device enabling ultra-low dropout and reverse current protection, while the reset circuit monitors VOUT directly against a -7.5% threshold and asserts RESET for ≥150ms after recovery.
This variant belongs to the MAX6469–MAX6470 subgroup: it features SHDN (not MR) and SET pins, supports fixed-output operation (SET = GND), and uses push-pull RESET. It lacks remote sense (FB) and manual reset (MR) functionality - confirmed by pin mapping and ordering suffix "A" (SHDN-enabled) and "D3" (150ms timeout).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +2.5V fixed (preset, no external resistor required) |
| Max Output Current | 300mA guaranteed - sufficient to power microcontrollers and peripheral ICs without external boost |
| Dropout Voltage | 114mV at 300mA - enables stable regulation even with <2.614V input when VOUT = 2.5V |
| Supply Current | 82µA typical - extends battery life in always-on portable systems |
| Reset Threshold | -7.5% of nominal VOUT (i.e., 2.3125V) - meets standard µP supply tolerance requirements |
| Reset Timeout | 150ms minimum - ensures reliable processor initialization after brownout recovery |
| Shutdown Current | 0.1µA typical - reduces system standby power to nanoampere level |
Pinout & Package
MAX6469TA25BD3+T is housed in an 8-pin TDFN-EP (3mm × 3mm, 0.5mm pitch) package with exposed paddle (EP) internally connected to GND. The EP must be soldered to PCB ground plane for thermal management and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.5V–5.5V supply; requires 0.1µF bypass capacitor to GND |
| 2 (GND) | Ground / thermal pad | Primary return path and heatsink; must connect to large copper area |
| 3 (SHDN) | Active-low shutdown control | Pull low to disable regulator and reduce IQ to 0.1µA; tie to IN for normal operation |
| 4 (RESET) | Active-low push-pull reset output | Drives µP reset pin directly; asserts low during power-up, brownout, or SHDN activation |
| 5 (SET) | Feedback configuration input | Connect to GND for +2.5V fixed output; open or pulled high disables regulator |
| 6 (OUT) | Regulated output | Delivers up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND |
| 7,8 (EP) | Exposed thermal paddle | Internally tied to GND; mandatory connection to PCB ground plane for thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated µP reset supervisor | Eliminates need for external supervisor IC; guarantees reset assertion during VIN ramp, brownout, and SHDN activation |
| Low-quiescent-current shutdown | Reduces total system standby current to sub-µA level - critical for coin-cell or energy-harvesting applications |
| Reverse current protection | Blocks backfeed from OUT to IN (<0.01µA leakage), preventing battery discharge when external voltage is applied to VOUT |
| Thermal and short-circuit protection | Shuts down at +180°C junction temperature with 20°C hysteresis; survives indefinite output short to GND |
| ±2.0% output accuracy over temp | Ensures reliable logic-level compliance for 2.5V I/O domains across industrial temperature range (-40°C to +85°C) |
Applications
| Handheld Instrument Power | USB Peripheral Regulation |
|---|---|
|
Use Scenario: Powering a portable multimeter's MCU, ADC, and display backlight from a single Li-ion cell. IC Role / Device Role / Timing Role: Primary 2.5V LDO with integrated reset - supplies stable voltage and ensures clean MCU boot after battery insertion or voltage sag. Use Value: Eliminates discrete supervisor and saves board space; 114mV dropout allows >30 minutes runtime down to 2.614V cell voltage. |
Use Scenario: Regulating +2.5V rail for USB-to-serial bridge IC and EEPROM in a compact dongle. IC Role / Device Role / Timing Role: Fixed-output LDO with push-pull RESET - provides regulated power and synchronizes host enumeration via reset timing. Use Value: 150ms reset timeout satisfies USB 2.0 suspend/resume timing; 82µA IQ keeps self-powered device within bus power limits. |
| Notebook Subsystem Supply | Bluetooth Module Core Rail |
|
Use Scenario: Delivering 2.5V to a notebook's embedded controller (EC) and keyboard controller during battery-only operation. IC Role / Device Role / Timing Role: Low-noise, high-accuracy LDO with SHDN control - enables EC sleep mode and fast wake-up with deterministic reset behavior. Use Value: 0.1µA shutdown current minimizes EC battery drain; ±2.0% accuracy prevents false resets during thermal throttling. |
Use Scenario: Powering Bluetooth SoC core logic (2.5V domain) in a hearing aid or wearable sensor node. IC Role / Device Role / Timing Role: Battery-optimized LDO with integrated brownout detection - maintains radio link integrity during voltage dips caused by RF transmit bursts. Use Value: -7.5% reset threshold triggers recovery before Bluetooth stack corruption; TDFN-EP package fits <3mm² footprint constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6470TA25BD3+T | Same pinout, identical specs except +2.5V output uses -12.5% reset threshold (vs. -7.5% for MAX6469TA25BD3+T) | Suitable where tighter reset margin is needed to tolerate larger supply ripple or aging effects | Select MAX6470TA25BD3+T only if system requires earlier reset assertion at 2.1875V (vs. 2.3125V) |
| TPS76325QDBVRQ1 | Automotive-grade 2.5V LDO (300mA) with separate reset IC required; no integrated supervisor or SHDN | Requires additional BOM components and PCB area; lacks 0.1µA shutdown and reverse leakage protection | Choose only if AEC-Q100 qualification is mandatory and design can accommodate external reset circuitry |
Compared with MAX6470TA25BD3+T, MAX6469TA25BD3+T offers earlier reset release for faster system boot; compared with TPS76325QDBVRQ1, it reduces component count, improves battery efficiency, and enhances reliability through monolithic integration.
Availability
MAX6469TA25BD3+T is available at Aetrix Electronics and suitable for handheld instruments, USB peripherals, and Bluetooth modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6469TA25BD3+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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and portable applications.
The MAX6469–MAX6484 product line was engineered specifically for space-constrained, battery-powered systems needing combined regulation and reset functionality in a single chip - reducing bill-of-materials and improving power-up reliability.
FAQ
What is the exact output voltage tolerance of MAX6469TA25BD3+T over temperature?
The MAX6469TA25BD3+T guarantees ±2.0% output voltage accuracy across the full -40°C to +85°C operating range. This specification applies to fixed-output operation with SET tied to GND and covers all load conditions from 1mA to 300mA. At +25°C, typical accuracy tightens to ±1.3%, but system design must rely on the worst-case ±2.0% limit for robustness.
Does MAX6469TA25BD3+T support adjustable output voltage?
No, MAX6469TA25BD3+T is configured for fixed +2.5V output only. Its SET pin must be connected to GND to enable this mode. While the MAX6469 family supports adjustable outputs via external resistors on SET, the TA25BD3+T variant is factory-trimmed for 2.5V and does not allow reconfiguration - attempting to drive SET with a divider will disable regulation.
What is the function of the exposed paddle (EP) on MAX6469TA25BD3+T?
The exposed paddle (EP) on MAX6469TA25BD3+T is internally connected to GND and serves exclusively as a thermal conduction path. It must be soldered to a dedicated PCB ground plane with adequate copper area to dissipate heat and maintain junction temperature below +150°C. EP is not an electrical signal pin and must never be left floating or connected to any net other than GND.
Can MAX6469TA25BD3+T be used with input voltages below 2.5V?
No, MAX6469TA25BD3+T has a minimum input voltage of 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Input undervoltage lockout (UVLO) activates below 2.25V (typ), and regulation cannot be maintained below VIN = VOUT + dropout (i.e., <2.614V for 2.5V output). Using VIN < 2.5V risks unregulated output, undefined RESET behavior, and potential damage.
How does the reset timeout period work for MAX6469TA25BD3+T?
The MAX6469TA25BD3+T provides a fixed 150ms minimum reset timeout (suffix D3), meaning RESET remains asserted for ≥150ms after VOUT rises above the -7.5% threshold (2.3125V). This delay ensures microprocessors complete internal initialization before exiting reset, regardless of input ramp rate. The timeout is internally generated and requires no external components.
MAX6469TA25BD3+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 (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+T FAQ
1.How can I place an order for MAX6469TA25BD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6469TA25BD3+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 MAX6469TA25BD3+T reliable?
The price and inventory of MAX6469TA25BD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6469TA25BD3+T is usually 5 days.
3.What payment methods are accepted for MAX6469TA25BD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6469TA25BD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6469TA25BD3+T?
MAX6469TA25BD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6469TA25BD3+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 MAX6469TA25BD3+T?
For technical support, including MAX6469TA25BD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6469TA25BD3+T requirements.
6.How does Aetrix verify that MAX6469TA25BD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6469TA25BD3+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 MAX6469TA25BD3+T meets industry standards.
7.What is the process for return or replacement of MAX6469TA25BD3+T?
All MAX6469TA25BD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6469TA25BD3+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 MAX6469TA25BD3+T part is unused and in its original packaging.
Return procedure for MAX6469TA25BD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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