My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6474TA18BD3+
- Part No.:
- MAX6474TA18BD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6474TA18BD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,591
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6474TA18BD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.8V output, -7.5% reset threshold accuracy, and 150ms (min) active-low push-pull reset timeout. It delivers ±2.0% output voltage accuracy over -40°C to +85°C, consumes only 82µA quiescent current, and supports shutdown mode (0.1µA). Designed for battery-powered portable equipment including Bluetooth modules and digital cameras.
For engineers reviewing the MAX6474TA18BD3+ datasheet, MAX6474TA18BD3+ pinout, MAX6474TA18BD3+ application, or MAX6474TA18BD3+ equivalent, key selection criteria include guaranteed 300mA load capability at low dropout (114mV @ 300mA), integrated manual reset input (MR), shutdown control (SHDN), and compatibility with 3.3µF minimum output capacitance for stable operation in space-constrained portable designs.
Technical Context
The MAX6474TA18BD3+ implements a dual-function LDO core with internal reference and a tightly coupled reset supervisor using the same reference voltage. Its regulator section operates from 2.5V to 5.5V input and maintains regulation down to 55mV dropout at 150mA load. The reset circuit monitors VOUT directly and asserts RESET when output falls below −7.5% of nominal (1.665V for 1.8V output), with built-in 150ms minimum timeout after recovery.
This device belongs to the MAX6471–MAX6474 subfamily and includes both SHDN (active-low shutdown) and MR (active-low manual reset) inputs - enabling full power sequencing control and field-initiated resets while VOUT remains in specification. RESET is push-pull active-low, eliminating external pull-up requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2.0% over −40°C to +85°C - ensures stable core logic supply for low-voltage microcontrollers and RF ICs. |
| Max Output Current | 300mA guaranteed - sufficient to power SoCs, sensors, and wireless transceivers without external pass devices. |
| Dropout Voltage | 114mV at 300mA load - enables operation from single-cell Li-ion (3.0V min) or triple-alkaline (4.5V) sources with margin. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring applications such as Bluetooth LE peripherals. |
| Reset Threshold | −7.5% of VOUT (1.665V) - matches standard microprocessor supply tolerance, eliminating need for external supervisor. |
| Reset Timeout | 150ms minimum - provides sufficient hold-off time for clock stabilization and memory initialization before processor release. |
| Shutdown Current | 0.1µA typical - reduces system standby power to nanoampere levels during deep sleep modes. |
Pinout & Package
MAX6474TA18BD3+ 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. Exposed paddle (EP) must be soldered to PCB ground plane for thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.5V–5.5V supply; requires 0.1µF ceramic bypass to GND for stability and noise rejection. |
| 2 (GND) | Ground reference & thermal path | Primary return path; must connect to large copper area or ground plane to dissipate heat and minimize noise coupling. |
| 3 (SHDN) | Active-low shutdown control | Pulling low disables regulator and reduces supply current to 0.1µA; tie to VIN for normal operation. |
| 4 (RESET) | Active-low push-pull reset output | Asserts low during power-up, brownout, or MR activation; no external pull-up needed; drives µP reset pin directly. |
| 5 (MR) | Active-low manual reset input | Allows external reset initiation (e.g., button press); internal 40kΩ pull-up to VOUT eliminates need for external resistor. |
| 6 (OUT) | Regulated output | Delivers 1.8V @ up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for transient response and stability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated manual reset (MR) | Enables field-serviceable reset without power cycle - critical for remote IoT nodes and handheld instruments. |
| Push-pull RESET output | Eliminates external pull-up resistor and associated leakage, reducing BOM count and board area in compact USB devices. |
| Low 82µA quiescent current | Extends shelf life and runtime of coin-cell–powered devices like Bluetooth beacons beyond 12 months. |
| Thermal and short-circuit protection | Guarantees safe operation under fault conditions; auto-recovery from thermal overload prevents latch-up or damage. |
| Reverse current protection | Blocks backfeed from OUT to IN (0.01µA typ), preventing battery drain when backup supply is present or IN is disconnected. |
Applications
| Bluetooth Module Power Management | Digital Camera Core Supply |
|---|---|
|
Use Scenario: Powers baseband processor and RF transceiver in Bluetooth 5.0 audio accessories with intermittent transmit bursts. IC Role / Device Role / Timing Role: LDO regulator + reset supervisor - provides clean 1.8V core rail and ensures deterministic boot after battery insertion or low-VIN recovery. Use Value: 114mV dropout enables >95% efficiency from 3.0V Li-ion; 150ms reset timeout guarantees oscillator lock before firmware execution. |
Use Scenario: Supplies image sensor interface and ISP core in compact digital cameras operating from dual AA alkaline cells. IC Role / Device Role / Timing Role: Primary voltage regulator with manual reset - sustains regulated output during motor-driven lens actuation and allows user-triggered system reboot. Use Value: MR pin accepts direct switch connection (no debounce required); ±2.0% accuracy maintains sensor ADC linearity across temperature. |
| Notebook Subsystem Backup Rail | USB Peripheral Power Sequencing |
|
Use Scenario: Provides always-on 1.8V supply to real-time clock and secure element in notebook platforms during S3/S4 suspend states. IC Role / Device Role / Timing Role: Low-IQ LDO with shutdown control - maintains volatile context while drawing <0.1µA during deep sleep, re-enabling on wake signal. Use Value: SHDN pin interfaces directly with chipset PMIC; reverse-current blocking prevents supercapacitor discharge into main battery. |
Use Scenario: Regulates 1.8V I/O rail for USB-C controller and Type-C port manager in docking stations and hubs. IC Role / Device Role / Timing Role: Dual-control LDO - coordinates power-up sequence via SHDN and validates rail integrity via RESET before enumerating USB devices. Use Value: Push-pull RESET drives USB controller's nRESET pin without level-shifting; 2.5V–5.5V input range accommodates wide-input buck converter outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6474TA18BD4+ | Same 1.8V output and MR/SHDN features, but 1200ms (min) reset timeout instead of 150ms. | Suitable for systems requiring longer reset assertion during slow-ramping supplies or high-capacitance loads. | Select MAX6474TA18BD4+ only if extended reset hold-off is required; otherwise MAX6474TA18BD3+ offers tighter timing alignment with fast-boot processors. |
| TPS79918YZTR | 1.8V LDO only (no reset or MR), 200mA output, 100µA IQ, no integrated supervisor functionality. | Requires external reset IC (e.g., TPS3808G18) to replicate full MAX6474TA18BD3+ functionality - increases BOM and layout complexity. | Choose only if reset supervision is handled elsewhere; MAX6474TA18BD3+ integrates both functions in one 3×3mm footprint. |
Compared with MAX6474TA18BD4+, the MAX6474TA18BD3+ provides faster system startup due to its 150ms reset timeout; compared with TPS79918YZTR, it eliminates the need for discrete reset supervision, reducing total solution size by >30% and simplifying qualification for battery-powered portable certification.
Availability
MAX6474TA18BD3+ is available at Aetrix Electronics and suitable for Bluetooth modules, digital cameras, notebook subsystems, and USB peripheral designs requiring stable component supply with long-term manufacturability and RoHS-compliant packaging.
Supply support for MAX6474TA18BD3+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX6469–MAX6484 product line was designed specifically for space- and power-constrained portable electronics, integrating precision LDO regulation with microprocessor-grade reset supervision in miniature packages.
FAQ
What is the output voltage tolerance of the MAX6474TA18BD3+ over temperature?
The MAX6474TA18BD3+ guarantees ±2.0% output voltage accuracy over the full operating temperature range of −40°C to +85°C. This specification applies to the fixed 1.8V output configuration and is verified across process, voltage, and temperature corners - ensuring reliable logic-level compliance for 1.8V I/O domains in portable systems.
Does the MAX6474TA18BD3+ require an external pull-up resistor on the MR pin?
No, the MAX6474TA18BD3+ includes an internal 40kΩ (typ) pull-up resistor from MR to VOUT, allowing direct connection of a momentary switch between MR and GND without external components. This design eliminates BOM cost and board space while providing inherent noise immunity for manual reset in handheld devices.
Can the MAX6474TA18BD3+ operate from a 2.5V input while delivering 1.8V at 300mA?
Yes - the MAX6474TA18BD3+ maintains regulation with a dropout voltage of 114mV at 300mA, meaning it requires only VIN ≥ 1.914V to sustain 1.8V output. At 2.5V input, it operates well within specification with ample headroom, delivering full 300mA load current while maintaining ±2.0% accuracy and low noise performance.
What is the function of the exposed paddle (EP) on the MAX6474TA18BD3+ TDFN package?
The exposed paddle (EP) on the MAX6474TA18BD3+ is internally connected to GND and serves as the primary thermal conduction path from the die to the PCB. It must be soldered to a solid copper ground plane to achieve specified thermal resistance (θJA = 41°C/W) and prevent junction temperature exceedance under continuous 300mA load.
How does the MAX6474TA18BD3+ handle reverse current flow when the input supply is disconnected?
The MAX6474TA18BD3+ incorporates reverse-current protection that limits OUT-to-IN leakage to 0.01µA (typ) when VOUT > VIN. This prevents backfeeding into a depleted or removed battery, preserving backup energy in supercapacitor- or secondary-battery–supported systems - a critical feature for maintenance-free portable instrumentation.
MAX6474TA18BD3+ 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 (1.8V)
- 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)
MAX6474TA18BD3+ FAQ
1.How can I place an order for MAX6474TA18BD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6474TA18BD3+ 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 MAX6474TA18BD3+ reliable?
The price and inventory of MAX6474TA18BD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6474TA18BD3+ is usually 5 days.
3.What payment methods are accepted for MAX6474TA18BD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6474TA18BD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6474TA18BD3+?
MAX6474TA18BD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6474TA18BD3+ 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 MAX6474TA18BD3+?
For technical support, including MAX6474TA18BD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6474TA18BD3+ requirements.
6.How does Aetrix verify that MAX6474TA18BD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6474TA18BD3+ 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 MAX6474TA18BD3+ meets industry standards.
7.What is the process for return or replacement of MAX6474TA18BD3+?
All MAX6474TA18BD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6474TA18BD3+, 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 MAX6474TA18BD3+ part is unused and in its original packaging.
Return procedure for MAX6474TA18BD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6474TA18BD3+ 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…
