My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6473TA33BD3+T
- Part No.:
- MAX6473TA33BD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6473TA33BD3+T.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,986
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6473TA33BD3+T from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 3.3V output, ±2.0% output voltage accuracy over temperature, 114mV dropout at 300mA load, and 2.5ms minimum reset timeout. It delivers stable power and reliable reset signaling for battery-powered microprocessor systems requiring compact, low-quiescent-current regulation.
For engineers reviewing the MAX6473TA33BD3+T datasheet, MAX6473TA33BD3+T pinout, MAX6473TA33BD3+T application, or MAX6473TA33BD3+T equivalent, this device serves as a single-chip solution combining precision LDO regulation and supervisor functionality - critical for portable electronics where supply sequencing, brownout immunity, and shutdown current below 0.1µA are design requirements.
Technical Context
The MAX6473TA33BD3+T implements a fully integrated LDO core with internal feedback resistors set for 3.3V output and a dedicated reset supervisor using the same reference voltage. Its active-low SHDN input enables digital control of regulator operation, reducing supply current to 0.1µA (typ) in shutdown mode.
This variant belongs to the MAX6473–MAX6474 subgroup: it features SHDN (not MR), open-drain or push-pull RESET output, and no manual reset input. The reset threshold is -7.5% of nominal VOUT (i.e., 3.0525V min), with guaranteed assertion within 35µs of VOUT falling below threshold and a fixed 2.5ms minimum timeout period (D3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.0% over -40°C to +85°C - ensures stable core logic supply for 3.3V microcontrollers without external feedback components. |
| Max Output Current | 300mA guaranteed - sufficient to power mid-tier MCUs, RF transceivers, or sensor subsystems directly. |
| Dropout Voltage | 114mV at 300mA - enables operation down to VIN = 3.414V, supporting single-cell Li-ion or 3× alkaline battery inputs. |
| Supply Current | 82µA typical operating / 0.1µA shutdown - extends battery life in always-on or sleep-mode portable devices. |
| Reset Threshold | -7.5% of 3.3V (2.97V to 3.0525V) - meets standard microprocessor supply tolerance requirements and prevents premature wake-up. |
| Reset Timeout | 2.5ms minimum - provides sufficient hold time for clock stabilization and processor initialization after power-up. |
| Input Voltage Range | 2.5V to 5.5V - compatible with common battery chemistries and intermediate rail supplies. |
Pinout & Package
MAX6473TA33BD3+T is packaged in an 8-pin TDFN-EP (3mm × 3mm, 0.5mm pitch) with exposed paddle. This thermally enhanced package supports high-power-density layouts and requires soldering the EP pad to PCB ground for optimal thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 2.5V–5.5V input; must be bypassed with 0.1µF capacitor to GND for stability. |
| 2 (GND) | Ground / Thermal Pad | Primary electrical ground and main thermal path; must connect to large copper area or ground plane. |
| 3 (SHDN) | Active-Low Shutdown Control | Pulling low disables regulator and reduces supply current to ≤0.1µA; connect to VIN for normal operation. |
| 4 (RESET) | Active-Low Reset Output | Open-drain or push-pull output; asserts low when VOUT < 2.97V or SHDN is low; holds for ≥2.5ms after recovery. |
| 5 (MR) | Manual Reset Input | Not present on MAX6473 - pin 5 is unused; MAX6473 uses SHDN-only control, not MR. |
| 6 (SET) | Feedback Configuration | Internally connected to GND for fixed 3.3V output; left unconnected or tied to GND per design - no external divider required. |
| 7,8 (OUT) | Regulated Output | Delivers 3.3V/300mA; requires ≥3.3µF low-ESR ceramic output capacitor for transient response and stability. |
| EP | Exposed Paddle | Internally connected to GND; must be soldered to PCB ground plane to achieve specified thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Reset Supervisor | Eliminates need for discrete supervisor IC; monitors VOUT against -7.5% threshold and asserts RESET with 2.5ms timeout. |
| Ultra-Low Shutdown Current | 0.1µA typical - enables multi-year battery life in IoT sensors or backup power circuits where regulator remains powered but inactive. |
| Reverse Current Protection | 0.01µA max OUT-to-IN leakage - prevents reverse discharge of primary battery when backup source powers OUT. |
| Thermal & Short-Circuit Protection | 180°C thermal shutdown with 20°C hysteresis and 450mA current limit - ensures robustness under fault conditions without external protection. |
| Low-Noise Regulation | 75µVRMS output noise (10Hz–100kHz) - suitable for noise-sensitive analog peripherals like ADCs or RF front-ends. |
Applications
| Handheld Instruments | PCMCIA / USB Devices |
|---|---|
Use Scenario: Power management in palm-sized test meters with LCD display, MCU, and analog front-end. IC Role / Device Role / Timing Role: Primary 3.3V LDO regulator and system reset supervisor during battery insertion, low-battery brownout, or cold start. Use Value: Ensures deterministic boot sequence and prevents MCU lockup by asserting RESET until VOUT stabilizes above 2.97V for ≥2.5ms. |
Use Scenario: Compact peripheral card requiring regulated 3.3V from host USB 5V rail with hot-plug safety. IC Role / Device Role / Timing Role: Step-down regulator with undervoltage lockout and reset generation for USB enumeration timing compliance. Use Value: 82µA quiescent current minimizes standby drain; 114mV dropout allows full 3.3V delivery even as USB input sags to 3.414V. |
| Notebook Subsystem | Bluetooth/Wireless LAN Module |
Use Scenario: Dedicated 3.3V rail for embedded controller (EC) or keyboard controller in ultra-thin notebooks. IC Role / Device Role / Timing Role: Always-on LDO with SHDN-controlled enable/disable and synchronized reset for EC firmware integrity. Use Value: 0.1µA shutdown current preserves battery charge during suspend-to-RAM; RESET output coordinates EC wake-up timing. |
Use Scenario: Powering Bluetooth SoC and associated RF circuitry in wearables with coin-cell or small Li-ion battery. IC Role / Device Role / Timing Role: Main system regulator with brownout detection and reset hold-off to prevent radio state corruption during voltage sag. Use Value: -7.5% reset threshold aligns with Bluetooth SIG power stability requirements; 2.5ms timeout exceeds minimum SoC reset pulse width. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76333DBVR | 300mA LDO only; no integrated reset circuit - requires external supervisor (e.g., TPS3809K33) for reset functionality. | Lacks built-in reset timeout and VOUT monitoring; adds BOM count, board area, and timing coordination complexity. | Select when reset timing is externally managed or when legacy designs mandate separate regulation/supervision blocks. |
| MAX6474TA33BD3+T | Identical specs except reset threshold: -12.5% (2.8875V) instead of -7.5%; otherwise pin-, package-, and function-compatible. | Better suited for systems with looser supply tolerance or higher noise margin; may delay reset assertion during marginal VOUT conditions. | Choose MAX6474TA33BD3+T if system requires deeper undervoltage margin before reset initiation. |
Compared with TPS76333DBVR, MAX6473TA33BD3+T reduces component count and eliminates inter-IC timing uncertainty; compared with MAX6474TA33BD3+T, it provides faster reset response to mild brownouts due to its tighter -7.5% threshold.
Availability
MAX6473TA33BD3+T is available at Aetrix Electronics and suitable for handheld instruments, PCMCIA/USB peripherals, and Bluetooth modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6473TA33BD3+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, automotive, and portable applications.
MAX6473TA33BD3+T belongs to the MAX6469–MAX6484 family of integrated LDO + reset supervisors, engineered specifically for space-constrained, battery-powered systems needing guaranteed 300mA output, sub-100µA quiescent current, and deterministic power-on reset behavior.
FAQ
What is the reset timeout duration for MAX6473TA33BD3+T?
The D3 suffix in MAX6473TA33BD3+T specifies a 2.5ms minimum reset timeout period. After VOUT rises above the -7.5% threshold (≥2.97V), RESET remains asserted for at least 2.5ms to ensure microprocessor clock and supply stabilization before release. This value is guaranteed across -40°C to +85°C and is independent of input voltage or load current.
Does MAX6473TA33BD3+T support adjustable output voltage?
No, MAX6473TA33BD3+T is factory-configured for fixed 3.3V output. Its SET pin is internally connected to GND; connecting an external resistor divider is unnecessary and unsupported. For adjustable versions, consider MAX6469–MAX6472 or MAX6477–MAX6480 variants with SET pin accessible for external feedback.
What package type is used for MAX6473TA33BD3+T?
MAX6473TA33BD3+T uses an 8-pin TDFN-EP package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad. This RoHS-compliant, lead(Pb)-free package requires soldering the EP pad to the PCB ground plane to meet thermal specifications and sustain 300mA continuous output.
How does the shutdown function operate on MAX6473TA33BD3+T?
MAX6473TA33BD3+T features an active-low SHDN pin (pin 3). Pulling SHDN low disables the regulator pass transistor and reduces total supply current to 0.1µA (typ), while maintaining RESET assertion. During shutdown, OUT is unregulated and decays; normal operation resumes within 20µs of SHDN returning high.
Is MAX6473TA33BD3+T compatible with lithium-ion battery input?
Yes, MAX6473TA33BD3+T supports input voltages from 2.5V to 5.5V, making it compatible with single-cell Li-ion (2.7V–4.2V) and Li-polymer batteries. Its 114mV dropout at 300mA ensures full 3.3V output even as battery voltage drops to 3.414V, extending usable runtime and enabling direct battery connection without pre-regulation.
MAX6473TA33BD3+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:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V (3.3V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.18V @ 300mA
- 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)
MAX6473TA33BD3+T FAQ
1.How can I place an order for MAX6473TA33BD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6473TA33BD3+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 MAX6473TA33BD3+T reliable?
The price and inventory of MAX6473TA33BD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6473TA33BD3+T is usually 5 days.
3.What payment methods are accepted for MAX6473TA33BD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6473TA33BD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6473TA33BD3+T?
MAX6473TA33BD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6473TA33BD3+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 MAX6473TA33BD3+T?
For technical support, including MAX6473TA33BD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6473TA33BD3+T requirements.
6.How does Aetrix verify that MAX6473TA33BD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6473TA33BD3+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 MAX6473TA33BD3+T meets industry standards.
7.What is the process for return or replacement of MAX6473TA33BD3+T?
All MAX6473TA33BD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6473TA33BD3+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 MAX6473TA33BD3+T part is unused and in its original packaging.
Return procedure for MAX6473TA33BD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6473TA33BD3+T Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
