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Analog Devices Inc./Maxim Integrated MAX6474TA15BD2-T
- Part No.:
- MAX6474TA15BD2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6474TA15BD2-T.pdf
- Description:
- IC REG LINEAR LDO WITH MPU RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6474TA15BD2-T from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, preset +1.5V output, -12.5% reset threshold, and 20ms minimum reset timeout. It features 82µA quiescent current, 55mV dropout at 150mA, and active-low push-pull RESET output. Designed for battery-powered portable systems requiring reliable power sequencing and brownout protection.
For engineers reviewing the MAX6474TA15BD2-T datasheet, MAX6474TA15BD2-T pinout, MAX6474TA15BD2-T application, or MAX6474TA15BD2-T equivalent, this device delivers verified 300mA LDO regulation with factory-trimmed voltage accuracy (±2.0%), integrated reset supervision, shutdown control, and manual reset input - all in an 8-pin TDFN-EP package.
Technical Context
The MAX6474TA15BD2-T integrates a precision LDO regulator core and a fully self-contained reset supervisor sharing the same bandgap reference. Its regulator operates from 2.5V to 5.5V input and maintains ±2.0% output voltage accuracy over -40°C to +85°C while delivering up to 300mA with dropout as low as 55mV at 150mA load.
The reset circuit monitors VOUT against a -12.5% threshold (i.e., asserts when VOUT falls below 87.5% of nominal 1.5V), provides 20ms minimum timeout, and supports both automatic assertion on undervoltage and manual assertion via MR pin. It includes internal 40kΩ pull-up from MR to VOUT and guarantees 200ns MR-to-RESET delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +1.5V fixed, factory-trimmed, ±2.0% accuracy over full temperature range |
| Max Output Current | 300mA guaranteed minimum; supports continuous load without thermal shutdown under typical PCB layout |
| Dropout Voltage | 55mV at 150mA load - enables stable 1.5V output from 2.05V input supply |
| Quiescent Current | 82µA typical - extends battery life in always-on portable instrumentation |
| Reset Threshold | -12.5% of VOUT (i.e., 1.3125V for 1.5V output), with guaranteed assertion before 1.35V and release after 1.425V |
| Reset Timeout | 20ms minimum - ensures µP initialization completes before release of RESET signal |
| Shutdown Current | 0.1µA typical - reduces system standby power to near-zero during sleep modes |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion, 3-cell alkaline, or USB-powered systems |
Pinout & Package
MAX6474TA15BD2-T is housed in an 8-pin TDFN-EP (3mm × 3mm) package with exposed paddle thermally and electrically connected to GND. The package supports high thermal dissipation when soldered to a 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 |
| 2 (GND) | Ground / Thermal Pad | Primary electrical return and thermal path; must be soldered to large copper area for thermal management |
| 3 (SHDN) | Active-Low Shutdown Control | Pulled high to IN for normal operation; pulling low disables regulator and reduces IQ to 0.1µA |
| 4 (RESET) | Active-Low Push-Pull Reset Output | Asserts low during power-up, brownout, or SHDN activation; remains low for ≥20ms after recovery |
| 5 (MR) | Active-Low Manual Reset Input | Internal 40kΩ pull-up to VOUT; logic-low pulse initiates reset even if VOUT is in specification |
| 6 (SET) | Feedback Selection Input | Connected to GND for fixed 1.5V mode; left unconnected or tied to divider for adjustable operation |
| 7,8 (OUT) | Regulated Output | Delivers 1.5V @ up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND |
| EP | Exposed Paddle | Internally connected to GND; must be soldered to PCB ground plane for thermal and electrical integrity |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Microprocessor Reset | Eliminates external supervisor IC; provides factory-set -12.5% threshold and 20ms timeout with push-pull drive |
| Manual Reset Input (MR) | Enables system-level reset initiation without power cycle; includes internal 40kΩ pull-up and 120ns glitch rejection |
| Ultra-Low Quiescent Current | 82µA operating / 0.1µA shutdown - critical for multi-year battery life in handheld instruments |
| Thermal & Short-Circuit Protection | Auto-shutdown at 180°C junction temperature with 20°C hysteresis; 450mA current limit prevents damage during fault |
| Reverse Current Protection | 0.01µA typical OUT-to-IN leakage - prevents backup battery discharge when main supply is removed |
| Low Dropout Performance | 55mV at 150mA enables operation from marginal input sources (e.g., aging alkaline cells) |
Applications
| Handheld Instruments | PCMCIA/USB Devices |
|---|---|
Use Scenario: Powering PDAs, palmtops, and portable test meters with single-cell Li-ion or 3-cell alkaline batteries. IC Role / Device Role: Primary 1.5V supply regulator with integrated reset supervision for ARM Cortex-M microcontrollers. Use Value: Ensures deterministic µP boot sequence after battery insertion or voltage sag, while minimizing standby drain. |
Use Scenario: Providing regulated 1.5V rail to USB peripheral controllers and PCMCIA card interface logic. IC Role / Device Role: LDO regulator with MR input for host-initiated reset and RESET output for controller synchronization. Use Value: Enables hot-plug reset signaling and eliminates need for discrete reset IC in compact card-edge designs. |
| Cellular Telephones | Digital Cameras |
Use Scenario: Supplying 1.5V to baseband processor I/O banks and RF front-end bias circuits in feature phones. IC Role / Device Role: Low-noise, low-dropout regulator with brownout detection and fast startup (<20µs). Use Value: Prevents processor lockup during RF transmit bursts that cause transient input droop. |
Use Scenario: Powering image sensor interfaces and flash memory controllers in compact digital still cameras. IC Role / Device Role: Regulator with shutdown control and manual reset for firmware update recovery sequences. Use Value: Allows deep-sleep mode with <0.1µA system current and instant wake-on-button-press via MR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6474TA15BD3-T | Same 1.5V output and -12.5% reset threshold, but 150ms minimum reset timeout instead of 20ms | Suitable for systems requiring longer reset hold time to accommodate slower clock stabilization | Select when extended reset duration is needed for legacy µP boot timing compliance |
| TPS76315QDBVRQ1 | 1.5V LDO with 100mA output, no integrated reset or MR; requires external supervisor (e.g., TPS3809) | Lower cost for simple regulation-only use cases where reset is handled separately | Choose only if system already includes discrete reset supervision and load current ≤100mA |
Compared with MAX6474TA15BD2-T, the MAX6474TA15BD3-T offers identical regulation performance but extends reset hold time for timing-critical processors, while the TPS76315QDBVRQ1 reduces integration level and output capability - making it suitable only for lower-current, non-integrated supervision designs.
Availability
MAX6474TA15BD2-T is available at Aetrix Electronics and suitable for handheld instruments, PCMCIA/USB devices, and cellular telephone designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6474TA15BD2-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 and mixed-signal ICs for power management, sensing, and connectivity in demanding environments.
The MAX6469–MAX6484 product line targets battery-powered portable electronics, delivering integrated LDO regulation and microprocessor supervision in ultra-small packages with minimal quiescent current.
FAQ
What is the exact output voltage tolerance of the MAX6474TA15BD2-T over temperature?
The MAX6474TA15BD2-T guarantees ±2.0% output voltage accuracy across the full -40°C to +85°C operating temperature range, as confirmed in the Electrical Characteristics table for fixed-output devices (MAX6469–MAX6476). This applies to its preset +1.5V output and is measured at loads from 1mA to 300mA.
Does the MAX6474TA15BD2-T support manual reset functionality?
Yes, the MAX6474TA15BD2-T includes an active-low Manual Reset (MR) input on Pin 5. When pulled low, it asserts the RESET output regardless of VOUT status, and RESET remains asserted for the full 20ms timeout period after MR returns high. MR has an internal 40kΩ pull-up to VOUT.
What package type and thermal characteristics does the MAX6474TA15BD2-T use?
The MAX6474TA15BD2-T uses an 8-pin TDFN-EP (3mm × 3mm) package with exposed paddle. Its thermal resistance θJA is 24.4°C/W, enabling 1951mW maximum power dissipation at +70°C ambient. The EP pad must be soldered to a PCB ground plane for optimal thermal performance.
Can the MAX6474TA15BD2-T be used with input voltages below 2.5V?
No - the MAX6474TA15BD2-T has a specified input voltage range of 2.5V to 5.5V. Below 2.5V, the device enters undervoltage lockout (UVLO) at 2.25V (min), disabling regulation and asserting RESET. Operation below 2.5V is not functional or characterized.
How does the reset timeout behavior work during power-up for the MAX6474TA15BD2-T?
During power-up, RESET remains asserted until VOUT reaches ≥87.5% of 1.5V (i.e., ≥1.3125V) and stays asserted for a minimum of 20ms thereafter. This ensures the microprocessor receives a clean, extended reset pulse after supply stabilization - independent of input ramp rate or load transients.
MAX6474TA15BD2-T 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 (1.5V)
- Voltage - Output (Max):
- 5.5V
- 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-EP (3x3)
MAX6474TA15BD2-T FAQ
1.How can I place an order for MAX6474TA15BD2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6474TA15BD2-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 MAX6474TA15BD2-T reliable?
The price and inventory of MAX6474TA15BD2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6474TA15BD2-T is usually 5 days.
3.What payment methods are accepted for MAX6474TA15BD2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6474TA15BD2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6474TA15BD2-T?
MAX6474TA15BD2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6474TA15BD2-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 MAX6474TA15BD2-T?
For technical support, including MAX6474TA15BD2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6474TA15BD2-T requirements.
6.How does Aetrix verify that MAX6474TA15BD2-T is sourced from the original manufacturer or authorized distributors?
All MAX6474TA15BD2-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 MAX6474TA15BD2-T meets industry standards.
7.What is the process for return or replacement of MAX6474TA15BD2-T?
All MAX6474TA15BD2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6474TA15BD2-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 MAX6474TA15BD2-T part is unused and in its original packaging.
Return procedure for MAX6474TA15BD2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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