My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6474TA33BD3+
- Part No.:
- MAX6474TA33BD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6474TA33BD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,342
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6474TA33BD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 3.3V output, -12.5% reset threshold accuracy, and 150ms minimum reset timeout. It features 82µA quiescent current, 114mV dropout at 300mA load, and active-low push-pull or open-drain RESET output. Designed for battery-powered portable equipment including Bluetooth modules and digital cameras.
For engineers reviewing the MAX6474TA33BD3+ datasheet, MAX6474TA33BD3+ pinout, MAX6474TA33BD3+ application, or MAX6474TA33BD3+ equivalent, key selection considerations include its shutdown capability (0.1µA), manual reset input (MR), thermal/short-circuit protection, and compatibility with 2.5V–5.5V input range in compact 8-pin TDFN-EP package.
Technical Context
The MAX6474TA33BD3+ integrates a precision LDO regulator core and a fully self-contained reset supervisor sharing the same voltage reference. Its regulator delivers ±2.0% output accuracy over –40°C to +85°C and supports fixed 3.3V output via internal resistor divider, with SET pin grounded per configuration.
The reset circuit monitors VOUT against a –12.5% threshold (i.e., 2.9025V nominal for 3.3V output), asserts active-low RESET during power-up/brownout, and sustains assertion for ≥150ms after recovery. MR input enables external reset initiation while VOUT remains in spec, with internal 40kΩ pullup to VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.0% over –40°C to +85°C - ensures stable core supply for 3.3V microcontrollers and peripherals. |
| Max Output Current | 300mA guaranteed - sufficient to power baseband processors, RF transceivers, or sensor subsystems in portable devices. |
| Dropout Voltage | 114mV at 300mA - enables operation down to VIN = 3.414V, critical for single-cell Li-ion or triple-alkaline battery systems. |
| Quiescent Current | 82µA typical - minimizes standby drain in always-on applications such as Bluetooth LE modules or USB suspend states. |
| Reset Threshold | –12.5% of VOUT (2.9025V) - provides tighter supply monitoring than –7.5% variants, suitable for high-reliability µP boot sequences. |
| Reset Timeout | 150ms minimum - meets JEDEC JESD78 requirements for processor initialization timing and clock stabilization. |
| Shutdown Current | 0.1µA typical - allows deep-sleep mode with near-zero system leakage when SHDN is asserted. |
| Input Voltage Range | 2.5V to 5.5V - supports wide battery chemistries (Li-ion, Li-Poly, 2–3 alkaline) and USB-powered operation. |
Pinout & Package
MAX6474TA33BD3+ is housed in an 8-pin TDFN-EP (3mm × 3mm, 0.75mm height) package with exposed paddle thermally and electrically connected to GND. The EP pad must be soldered to a PCB ground plane for optimal thermal dissipation and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 2.5V–5.5V supply; requires 0.1µF ceramic bypass to GND close to pin for stability. |
| 2 (GND) | Ground / Thermal Pad | Primary return path and heatsink; must connect to large copper area or internal ground plane. |
| 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 Reset Output | Push-pull or open-drain configurable; asserts low during brownout, power-up, or MR activation. |
| 5 (MR) | Active-Low Manual Reset Input | Internal 40kΩ pullup to VOUT; logic-low pulse initiates reset regardless of VOUT status. |
| 6 (SET) | Feedback Reference Input | Grounded for fixed 3.3V output; unused in this variant - not connected to external divider. |
| 7,8 (OUT) | Regulated Output | Delivers 3.3V @ up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for loop stability. |
| EP | Exposed Paddle | Internally tied to GND; mandatory connection to PCB ground plane for thermal management and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Microprocessor Reset | Eliminates need for discrete supervisor IC; guarantees reset assertion during power-up, brownout, and manual trigger events. |
| Manual Reset Input (MR) | Enables field-serviceable or test-mode resets without cycling main power - critical for embedded diagnostics and firmware updates. |
| Thermal & Short-Circuit Protection | Shuts down pass transistor at 180°C junction temperature with 20°C hysteresis; survives indefinite output short to GND. |
| Reverse Current Protection | 0.01µA typical OUT-to-IN leakage prevents battery backfeed - essential for backup-supply architectures and hot-swap designs. |
| Low Dropout + Low IQ | 114mV dropout at full 300mA load and only 82µA operating current enable >90% efficiency in 3.3V/3.6V battery systems. |
| Wide Input Range Support | 2.5V–5.5V input accommodates aging batteries, USB 2.0/3.0 ports, and multi-chemistry power sources without redesign. |
Applications
| Handheld Instruments | Bluetooth Modules |
|---|---|
|
Use Scenario: Powering ARM Cortex-M based data loggers with real-time clock, SD card interface, and analog front-end in palm-sized field instruments. IC Role / Device Role / Timing Role: Primary 3.3V system rail regulator with integrated reset supervision ensuring deterministic µP boot before sensor sampling begins. Use Value: Eliminates external reset IC and saves 2.5mm² board area; 150ms reset timeout aligns with crystal oscillator stabilization time. |
Use Scenario: Supplying 3.3V to BLE SoC (e.g., Nordic nRF52832), RF front-end, and flash memory in compact wireless sensor nodes. IC Role / Device Role / Timing Role: Core LDO delivering regulated 3.3V under dynamic load (10mA–120mA burst), with MR enabling OTA firmware recovery. Use Value: 82µA quiescent current extends coin-cell life beyond 2 years in sleep-dominated duty cycles; MR simplifies factory programming jigs. |
| Notebook Subsystems | Digital Cameras |
|
Use Scenario: Providing auxiliary 3.3V rail for embedded controller (EC), keyboard backlight driver, and touchpad interface in ultrabook platforms. IC Role / Device Role / Timing Role: Secondary regulator with independent reset signaling to EC during main CPU power sequencing. Use Value: Push-pull RESET output drives EC's dedicated reset pin directly; SHDN enables coordinated low-power state transitions across subsystems. |
Use Scenario: Powering image signal processor (ISP), CMOS sensor bias, and SDIO interface in consumer-grade digital still cameras. IC Role / Device Role / Timing Role: Main 3.3V domain regulator with brownout detection preventing corrupted frame capture during battery sag. Use Value: –12.5% reset threshold (2.9025V) triggers before ISP lockup occurs; 114mV dropout preserves headroom during flash LED current surges. |
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 | No integrated reset; requires external supervisor (e.g., TPS3808G01); 120mA max output; 125mV dropout at 100mA. | Lacks MR input and programmable reset timeout; suitable only where reset functionality is implemented elsewhere. | Select if board space permits separate reset IC and load current ≤120mA suffices. |
| ADP196ACBZ-3.3-R7 | Includes power-good flag but no reset timeout or MR; 300mA output; 200mV dropout at 300mA; no shutdown pin. | Cannot replace reset timing control or manual reset function; lacks SHDN for ultra-low-power sleep modes. | Choose only when reset timing is managed by host µC and shutdown is unnecessary. |
Compared with TPS76333DBVR and ADP196ACBZ-3.3-R7, the MAX6474TA33BD3+ uniquely integrates reset timeout, manual reset, and sub-0.1µA shutdown in a single 8-pin TDFN - reducing BOM count, PCB footprint, and design validation effort for portable 3.3V systems.
Availability
MAX6474TA33BD3+ is available at Aetrix Electronics and suitable for handheld instruments, Bluetooth modules, and digital cameras requiring stable component supply with long-term industrial availability and RoHS-compliant packaging.
Supply support for MAX6474TA33BD3+ 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 highly integrated, ultra-low-quiescent-current LDOs with built-in reset supervision - specifically engineered for battery-constrained systems where reliability, small size, and minimal external components are critical.
FAQ
What is the exact reset threshold voltage for MAX6474TA33BD3+?
The MAX6474TA33BD3+ uses the "B" suffix for reset threshold accuracy, corresponding to –12.5% of nominal output voltage. With a fixed 3.3V output, this yields a reset threshold of 2.9025V (3.3V × 0.875). The device asserts RESET when VOUT falls below this value and holds it asserted for ≥150ms after recovery, as specified in the Electrical Characteristics table.
Does MAX6474TA33BD3+ support adjustable output voltage?
No, MAX6474TA33BD3+ is configured for fixed 3.3V output. Its SET pin is internally connected to the feedback network and must be grounded per the datasheet's preset-voltage mode. Unlike MAX6469–MAX6472 variants, the MAX6474 does not support external resistor-divider adjustment - the "A" in the part number denotes fixed-output configuration.
How is the 150ms reset timeout period implemented in MAX6474TA33BD3+?
The "D3" suffix in MAX6474TA33BD3+ selects the 150ms minimum reset timeout period. This is a factory-programmed, monolithic timing element within the IC - no external capacitor or resistor is required. The timeout begins when VOUT rises above the –12.5% threshold and continues for ≥150ms, ensuring reliable µP initialization even with slow-rising clocks or PLL lock times.
Can MAX6474TA33BD3+ be used with a lithium coin cell?
Yes, MAX6474TA33BD3+ operates from 2.5V input, making it compatible with CR2032 (nominal 3.0V, end-of-life ~2.0V) when paired with appropriate undervoltage lockout margin. Its 82µA quiescent current and 0.1µA shutdown mode extend coin-cell life significantly. However, ensure VIN never drops below 2.25V (UVLO threshold) to avoid uncontrolled reset behavior.
What package type and thermal characteristics apply to MAX6474TA33BD3+?
MAX6474TA33BD3+ uses an 8-pin TDFN-EP (3mm × 3mm) package with exposed paddle. Its thermal resistance θJA is 24.4°C/W, enabling 1951mW max power dissipation at +70°C ambient. For reliable operation at 300mA, maintain PCB copper area under the EP pad and limit (VIN – VOUT) × IOUT to stay below thermal limits - e.g., at VIN = 4.2V, max allowable power is 327mW.
MAX6474TA33BD3+ 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 (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)
MAX6474TA33BD3+ FAQ
1.How can I place an order for MAX6474TA33BD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6474TA33BD3+ 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 MAX6474TA33BD3+ reliable?
The price and inventory of MAX6474TA33BD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6474TA33BD3+ is usually 5 days.
3.What payment methods are accepted for MAX6474TA33BD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6474TA33BD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6474TA33BD3+?
MAX6474TA33BD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6474TA33BD3+ 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 MAX6474TA33BD3+?
For technical support, including MAX6474TA33BD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6474TA33BD3+ requirements.
6.How does Aetrix verify that MAX6474TA33BD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6474TA33BD3+ 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 MAX6474TA33BD3+ meets industry standards.
7.What is the process for return or replacement of MAX6474TA33BD3+?
All MAX6474TA33BD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6474TA33BD3+, 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 MAX6474TA33BD3+ part is unused and in its original packaging.
Return procedure for MAX6474TA33BD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6474TA33BD3+ 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 practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
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…
