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Analog Devices Inc./Maxim Integrated MAX6473TA15AD3
- Part No.:
- MAX6473TA15AD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6473TA15AD3.pdf
- Description:
- IC REG LINEAR LDO 300MA
- Quantity:
- Payment:
- Shipping:
Inventory:1,467
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Product details
Overview
MAX6473TA15AD3 from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.5V output voltage, -7.5% reset threshold accuracy, and 150ms minimum reset timeout period. It features 82µA quiescent current, 55mV dropout at 150mA, and active-low push-pull RESET output. Designed for battery-powered portable systems requiring precise power sequencing and brownout protection.
For engineers reviewing the MAX6473TA15AD3 datasheet, MAX6473TA15AD3 pinout, MAX6473TA15AD3 application, or MAX6473TA15AD3 equivalent, this device delivers verified 1.5V regulation with integrated reset supervision, shutdown control, and thermal/short-circuit protection - critical for handheld instruments, Bluetooth modules, and USB-powered peripherals where supply stability and startup reliability are non-negotiable.
Technical Context
The MAX6473TA15AD3 implements a precision bandgap-referenced LDO core with dual-mode feedback (fixed via internal resistors when SET = GND), and shares its reference with a comparator-based reset supervisor. Its SHDN input enables digital shutdown to 0.1µA, while the RESET output remains asserted during VIN undervoltage lockout (2.25V), VOUT dropout, or SHDN assertion.
This variant belongs to the MAX6473–MAX6474 subgroup: it includes active-low SHDN (Pin 3), active-low push-pull RESET (Pin 4), MR input (Pin 5), and OUT (Pin 6) - confirming manual reset capability and no remote sense or adjustable output functionality. It operates across -40°C to +85°C with ±2.0% output voltage accuracy over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2.0% over -40°C to +85°C - ensures stable core logic or low-voltage sensor rail without external resistor network. |
| Max Output Current | 300mA guaranteed - sufficient for microcontrollers, RF transceivers, or small FPGA I/O banks in portable designs. |
| Dropout Voltage | 55mV at 150mA load - enables operation from single-cell Li-ion (3.0V min) or alkaline (2.5V min) with >1.445V regulated output. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring or sleep-mode applications. |
| Reset Threshold | -7.5% of nominal VOUT (1.406V min assert, 1.425V max deassert) - meets standard µP supply tolerance requirements. |
| Reset Timeout | 150ms minimum - provides adequate stabilization time for clock oscillators and memory initialization before processor release. |
| Shutdown Current | 0.1µA typical - reduces system standby power to negligible levels during deep-sleep states. |
Pinout & Package
MAX6473TA15AD3 is housed in an 8-pin TDFN-EP package (3mm × 3mm, 0.75mm height) with exposed paddle thermally connected to GND. Pin 1 = IN, Pin 2 = GND, Pin 3 = SHDN, Pin 4 = RESET, Pin 5 = MR, Pin 6 = OUT; Pins 7 and 8 are NC (no internal connection). The exposed paddle must be soldered to PCB ground plane for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Regulator input supply | Accepts 2.5V–5.5V input; bypass with 0.1µF ceramic capacitor to GND for stability and transient response. |
| GND (Pin 2) | Power and signal reference | Serves as electrical ground and primary thermal path; requires direct connection to large copper area or ground plane. |
| SHDN (Pin 3) | Active-low shutdown control | Pulling low disables regulator and reduces supply current to 0.1µA; connect to VIN for normal operation. |
| RESET (Pin 4) | Active-low push-pull reset output | Drives µP reset pin directly; asserts low during power-up, brownout, or SHDN activation; holds for full 150ms timeout. |
| MR (Pin 5) | Active-low manual reset input | Allows external reset initiation while VOUT is in spec; internal 40kΩ pullup to VOUT eliminates need for external resistor. |
| OUT (Pin 6) | Regulated output | Delivers 1.5V ±2% at up to 300mA; requires ≥3.3µF low-ESR ceramic output capacitor for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated microprocessor reset | Eliminates external supervisor IC; guarantees reset assertion during power-up, brownout, and shutdown events with 150ms timing. |
| Manual reset input (MR) | Enables field-service or test-mode reset without cycling power; compatible with TTL/CMOS logic and open-drain drivers. |
| Low-quiescent-current shutdown | Reduces system standby current to sub-µA level, enabling multi-year battery life in IoT edge sensors and wearables. |
| Reverse current protection | Blocks backfeed from OUT to IN (<0.01µA leakage), preventing battery discharge when external backup sources are present. |
| Thermal and short-circuit protection | Shuts down pass transistor at 180°C junction temp with 20°C hysteresis; sustains indefinite output short without damage. |
Applications
| Handheld Instruments | Bluetooth Modules |
|---|---|
|
Use Scenario: Powering ARM Cortex-M0+ MCU and analog front-end in portable multimeter with coin-cell backup. IC Role / Device Role / Timing Role: Primary 1.5V supply regulator with synchronized reset assertion to hold MCU in reset until stable 1.5V rail and crystal oscillator settle. Use Value: Prevents spurious boot sequences during battery insertion or voltage sag; MR pin allows technician-initiated calibration reset. |
Use Scenario: Supplying BLE SoC (e.g., nRF52832) and RF front-end in compact wireless sensor node. IC Role / Device Role / Timing Role: Delivers clean 1.5V VDDIO rail while RESET ensures radio firmware initializes only after full power and clock stability. Use Value: 55mV dropout enables operation down to 2.0V battery voltage; 82µA IQ extends 200mAh coin-cell life beyond 2 years in sleep mode. |
| USB-Powered Peripherals | PCMCIA Cards |
|
Use Scenario: Regulating 1.5V for USB audio codec and MEMS microphone in bus-powered dongle. IC Role / Device Role / Timing Role: Converts 5V USB VBUS to 1.5V with integrated reset to coordinate codec initialization and USB enumeration sequence. Use Value: Push-pull RESET drives codec reset pin directly; 150ms timeout aligns with USB 2.0 suspend/resume timing windows. |
Use Scenario: Providing 1.5V core voltage and reset signaling for legacy PCMCIA Wi-Fi card with 3.3V interface. IC Role / Device Role / Timing Role: Supplies isolated 1.5V domain while asserting RESET to halt card controller until host-side 3.3V and clock stabilize. Use Value: MR input allows host driver to force card reinitialization without physical hot-swap; SHDN enables dynamic power gating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6473TA15BD3 | Same package and pinout, but -12.5% reset threshold (1.312V min assert) instead of -7.5%. | Better suited for systems with wider supply tolerance or higher noise margin on reset line. | Select MAX6473TA15BD3 only if design requires deeper undervoltage detection before reset assertion. |
| TPS76315QDBVRQ1 | Automotive-grade 1.5V LDO (300mA) with 200ms reset timeout, but no MR input or shutdown pin. | Lacks manual reset and shutdown control; requires external supervisor for reset functionality. | Choose TPS76315QDBVRQ1 only for AEC-Q100-compliant automotive body electronics where MR is unnecessary. |
Compared with MAX6473TA15BD3 and TPS76315QDBVRQ1, the MAX6473TA15AD3 uniquely combines -7.5% reset accuracy, MR input, and SHDN control in a single 8-pin TDFN - enabling compact, feature-complete power supervision without external components in space-constrained portable designs.
Availability
MAX6473TA15AD3 is available at Aetrix Electronics and suitable for handheld instruments, Bluetooth modules, and USB-powered peripherals requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across industrial temperature range.
Supply support for MAX6473TA15AD3 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 delivers integrated LDO regulators with microprocessor reset functionality specifically for battery-powered equipment where ultra-low IQ, accurate reset timing, and compact packaging are essential.
FAQ
What is the exact output voltage tolerance of the MAX6473TA15AD3 over temperature?
The MAX6473TA15AD3 guarantees ±2.0% output voltage accuracy over the full -40°C to +85°C operating range. At +25°C, typical accuracy is ±1.1%, and the device maintains this tight tolerance without requiring external trimming or calibration. This specification applies specifically to the fixed 1.5V output version denoted by the "A15" suffix in MAX6473TA15AD3.
Does the MAX6473TA15AD3 support adjustable output voltage?
No, the MAX6473TA15AD3 does not support adjustable output voltage. It is a fixed-output variant with internal feedback resistors set to 1.5V. The "A15" in MAX6473TA15AD3 explicitly denotes the 1.5V preset; adjustable operation requires models like MAX6473UT15AD3 (SOT23) or MAX6477 variants with SET pin functionality - which MAX6473TA15AD3 lacks per its pin configuration and datasheet grouping.
What reset timeout period is implemented in the MAX6473TA15AD3?
The MAX6473TA15AD3 implements a 150ms minimum reset timeout period, indicated by the "D3" suffix in the part number. This value is factory-trimmed and guaranteed across temperature and supply conditions. The reset output remains asserted for at least 150ms after VOUT rises above the -7.5% threshold, ensuring reliable microprocessor initialization in systems with slow-ramping clocks or memory devices.
Can the MAX6473TA15AD3 be used with a 2.5V input supply?
Yes, the MAX6473TA15AD3 supports input voltages from 2.5V to 5.5V. With a 2.5V input and 1.5V output, the dropout is 1.0V - well within the absolute maximum ratings. However, at full 300mA load, dropout rises to 114mV, so 2.5V input still provides 1.386V output - above the 1.406V minimum required for -7.5% reset deassertion. Operation is fully specified and validated at 2.5V IN.
Is the exposed paddle on the MAX6473TA15AD3 TDFN package electrically connected?
Yes, the exposed paddle (EP) on the MAX6473TA15AD3's 8-pin TDFN package is internally connected to GND. It must be soldered to the PCB ground plane to ensure proper thermal dissipation and electrical grounding. The datasheet explicitly states EP is "internally connected to GND" and warns against using it as the sole electrical GND connection - dedicated bond wires to Pin 2 (GND) remain essential for signal integrity.
MAX6473TA15AD3 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):
- 96 µA
- PSRR:
- -
- Control Features:
- Manual Reset, 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)
MAX6473TA15AD3 FAQ
1.How can I place an order for MAX6473TA15AD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6473TA15AD3 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 MAX6473TA15AD3 reliable?
The price and inventory of MAX6473TA15AD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6473TA15AD3 is usually 5 days.
3.What payment methods are accepted for MAX6473TA15AD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6473TA15AD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6473TA15AD3?
MAX6473TA15AD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6473TA15AD3 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 MAX6473TA15AD3?
For technical support, including MAX6473TA15AD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6473TA15AD3 requirements.
6.How does Aetrix verify that MAX6473TA15AD3 is sourced from the original manufacturer or authorized distributors?
All MAX6473TA15AD3 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 MAX6473TA15AD3 meets industry standards.
7.What is the process for return or replacement of MAX6473TA15AD3?
All MAX6473TA15AD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6473TA15AD3, 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 MAX6473TA15AD3 part is unused and in its original packaging.
Return procedure for MAX6473TA15AD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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