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Analog Devices Inc./Maxim Integrated MAX6472TA18BD3+
- Part No.:
- MAX6472TA18BD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6472TA18BD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,858
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Product details
Overview
MAX6472TA18BD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.8V output, -12.5% reset threshold accuracy, and 150ms (min) reset timeout. It features 82µA quiescent current, 55mV dropout at 150mA, and active-low open-drain RESET output. Designed for battery-powered portable equipment including Bluetooth modules and digital cameras.
For engineers reviewing the MAX6472TA18BD3+ datasheet, MAX6472TA18BD3+ pinout, MAX6472TA18BD3+ application, or MAX6472TA18BD3+ equivalent, key selection criteria include guaranteed 300mA output under -40°C to +85°C, shutdown current of 0.1µA (typ), manual reset input (MR), and compatibility with 3.3µF minimum output capacitance.
Technical Context
The MAX6472TA18BD3+ belongs to the MAX6471–MAX6474/MAX6479–MAX6482 variant group, confirmed by its "A"-suffix reset threshold (−12.5%) and "D3" timeout (150ms min). It integrates a manual reset input (MR) with internal 40kΩ pullup to VOUT and supports both push-pull and open-drain RESET configurations - this part uses open-drain as specified in Pin Description tables for MAX6471/MAX6472.
Its regulator core operates from 2.5V to 5.5V input, delivers ±2.0% output voltage accuracy over temperature, and includes thermal shutdown (180°C trip), short-circuit protection, and reverse current blocking (0.01µA OUT→IN leakage). The MR pin accepts TTL/CMOS logic levels and asserts RESET while low, holding it for the full 150ms timeout after release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2.0% over −40°C to +85°C - ensures stable core voltage for 1.8V logic and RF ICs. |
| Max Output Current | 300mA guaranteed - sufficient for baseband processors and wireless transceivers in portable devices. |
| Dropout Voltage | 55mV at 150mA - enables operation from single-cell Li-ion (3.0V min) down to ~2.85V under load. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring or sleep-mode applications. |
| Reset Threshold | −12.5% of VOUT (1.575V nominal) - provides conservative brownout detection for 1.8V systems. |
| Reset Timeout | 150ms minimum - meets processor reset hold-time requirements for ARM Cortex-M and similar MCUs. |
| Shutdown Current | 0.1µA typical - enables ultra-low-power system suspend states without external switches. |
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, dual-cell alkaline, and USB-powered operation. |
Pinout & Package
MAX6472TA18BD3+ is packaged in an 8-pin TDFN-EP (3mm × 3mm, 0.5mm pitch) with exposed paddle. The package provides low thermal resistance (ØJC = 41°C/W) and requires soldering the EP pad to PCB ground for optimal thermal dissipation and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 2.5V–5.5V supply; bypass to GND with 0.1µF ceramic capacitor for high-frequency stability. |
| 2 (GND) | Ground / Thermal Pad | Primary electrical ground and thermal path; must connect to large PCB ground plane for heat removal. |
| 3 (MR) | Manual Reset Input | Active-low; internal 40kΩ pullup to VOUT; asserts RESET when pulled low, holds for 150ms after release. |
| 4 (RESET) | Active-Low Reset Output | Open-drain; sinks 3.2mA at 0.4V max; requires external pullup for µP reset line interfacing. |
| 5 (SET) | Feedback Input | Connected to GND for fixed 1.8V output; left unconnected or tied to divider for adjustable mode (not used here). |
| 6 (OUT) | Regulator Output | Delivers regulated 1.8V; requires ≥3.3µF low-ESR ceramic capacitor at output for stability and transient response. |
| EP | Exposed Paddle | Internally connected to GND; must be soldered to PCB ground plane - not an electrical signal pin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Manual Reset (MR) | Eliminates need for external reset button circuitry; no external debounce required due to 120ns glitch rejection. |
| Ultra-Low Shutdown Current | 0.1µA typ enables multi-year battery life in IoT sensor nodes during deep-sleep modes. |
| Reverse Current Protection | 0.01µA OUT→IN leakage prevents backup capacitor or battery discharge when main supply is removed. |
| Thermal & Short-Circuit Protection | 180°C shutdown with 20°C hysteresis allows safe fault recovery without latch-up or damage. |
| Low-Noise LDO Core | 75µVRMS output noise (10Hz–100kHz) supports noise-sensitive analog and RF subsystems. |
Applications
| Bluetooth Module Power | Digital Camera Core Supply |
|---|---|
|
Use Scenario: Powers Bluetooth SoC (e.g., Nordic nRF52840) in wearable earbuds with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Provides clean, regulated 1.8V VDD_IO and VDD_ANA rails; MR pin interfaces with tactile button for user-initiated firmware reset. Use Value: 150ms RESET timeout ensures reliable SoC initialization after battery insertion or brownout; 55mV dropout preserves runtime down to 2.85V cell voltage. |
Use Scenario: Supplies image sensor interface and ISP core logic in compact digital camera with intermittent high-current burst loads. IC Role / Device Role / Timing Role: Delivers stable 1.8V under dynamic 10mA–300mA load steps; RESET monitors VOUT to prevent corrupted frame capture during power sag. Use Value: 82µA quiescent current minimizes standby drain; thermal shutdown protects against lens motor-induced board heating. |
| PCMCIA Card Regulation | Handheld Instrument MCU Supply |
|
Use Scenario: Regulates 1.8V supply for PCMCIA Wi-Fi card operating from 3.3V host bus with variable load and hot-plug events. IC Role / Device Role / Timing Role: Acts as isolated LDO with MR tied to card-detect signal; RESET asserts on undervoltage lockout (2.25V VIN) and VOUT sag. Use Value: −12.5% reset threshold provides margin against noise-induced false resets; open-drain RESET allows wired-OR with other supervisors. |
Use Scenario: Powers ARM Cortex-M4 MCU in handheld test instrument with battery + USB dual-input architecture. IC Role / Device Role / Timing Role: Primary 1.8V core regulator; SHDN controlled by system PMIC; MR driven by front-panel reset switch. Use Value: 0.1µA shutdown current enables >10-year shelf life; ±2.0% accuracy ensures consistent ADC reference and timing across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79918YZTR | No integrated reset or MR; 1.8V fixed, 200mA, 25µA IQ, 75mV dropout at 150mA. | Lacks reset supervision - requires external supervisor (e.g., TPS3808) for µP reset functionality. | Choose when reset is handled separately and lower IQ is critical; not drop-in for MAX6472TA18BD3+. |
| ADP160ACBZ-1.8-R7 | No reset circuit; 1.8V fixed, 150mA, 570nA IQ, 105mV dropout at 150mA; no MR or RESET pins. | Targeted at ultra-low-IQ applications only; cannot replace reset-dependent functions. | Select only if system already implements discrete reset supervision and load current ≤150mA. |
Compared with TPS79918YZTR and ADP160ACBZ-1.8-R7, MAX6472TA18BD3+ uniquely integrates MR and open-drain RESET in a single 8-pin TDFN, eliminating BOM count and layout area while guaranteeing coordinated reset timing with regulation - essential for space-constrained portable designs.
Availability
MAX6472TA18BD3+ is available at Aetrix Electronics and suitable for Bluetooth modules, digital cameras, PCMCIA cards, and handheld instruments requiring stable component supply with long-term lifecycle support.
Supply support for MAX6472TA18BD3+ 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 battery-powered portable electronics needing tightly integrated power regulation and microprocessor supervision in minimal footprint packages.
FAQ
What is the function of the MR pin on the MAX6472TA18BD3+?
The MR (Manual Reset) pin on the MAX6472TA18BD3+ is an active-low input that forces the RESET output low when asserted, regardless of VOUT level. It features an internal 40kΩ pullup to VOUT and holds RESET active for the full 150ms timeout after MR transitions high. This enables hardware-initiated resets via pushbutton or system logic without requiring external components - a core capability distinguishing MAX6472TA18BD3+ from basic LDOs.
Does the MAX6472TA18BD3+ support adjustable output voltage?
No, the MAX6472TA18BD3+ is configured for fixed 1.8V output. Its SET pin is internally connected to GND per the ordering suffix "A18", indicating preset voltage mode. While the underlying MAX6472 family supports adjustable operation via external resistor divider on SET, MAX6472TA18BD3+ does not use that configuration - the datasheet specifies SET must be grounded for fixed-output variants like this one.
What is the maximum input voltage the MAX6472TA18BD3+ can tolerate?
The MAX6472TA18BD3+ has an absolute maximum input voltage rating of +7V on the IN pin, but its functional operating range is strictly 2.5V to 5.5V as specified in Electrical Characteristics. Operation above 5.5V risks violating regulation accuracy, increasing dropout, and triggering undervoltage lockout (VUVLO = 2.25V–2.47V). For sustained reliability, keep VIN within 2.5V–5.5V - e.g., single-cell Li-ion (3.0–4.2V) or USB 5V with appropriate derating.
How does the MAX6472TA18BD3+ behave during battery removal?
When the IN supply is removed, the MAX6472TA18BD3+ enters reverse-current protection mode: OUT-to-IN leakage drops to 0.01µA (typ), preventing backup capacitor or coin-cell discharge. The RESET output asserts immediately and remains active until IN rises above VUVLO and VOUT exceeds 1.575V (−12.5% of 1.8V). This behavior enables safe battery hot-swap and maintains system state in low-power retention modes - a key feature validated in the device's Absolute Maximum Ratings and Detailed Description sections.
Is the RESET output of the MAX6472TA18BD3+ push-pull or open-drain?
The RESET output of the MAX6472TA18BD3+ is open-drain, as confirmed by its Pin Description table (MAX6471/MAX6472 group) and Electrical Characteristics (VOL = 0.4V at 3.2mA sink). It requires an external pullup resistor to VCC or VIO to generate a valid logic-high level for µP reset inputs. This configuration allows multiple RESET sources to be wire-OR'd onto a shared reset bus - a design advantage over push-pull outputs in multi-rail systems.
MAX6472TA18BD3+ 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
- 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)
MAX6472TA18BD3+ FAQ
1.How can I place an order for MAX6472TA18BD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6472TA18BD3+ 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 MAX6472TA18BD3+ reliable?
The price and inventory of MAX6472TA18BD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6472TA18BD3+ is usually 5 days.
3.What payment methods are accepted for MAX6472TA18BD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6472TA18BD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6472TA18BD3+?
MAX6472TA18BD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6472TA18BD3+ 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 MAX6472TA18BD3+?
For technical support, including MAX6472TA18BD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6472TA18BD3+ requirements.
6.How does Aetrix verify that MAX6472TA18BD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6472TA18BD3+ 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 MAX6472TA18BD3+ meets industry standards.
7.What is the process for return or replacement of MAX6472TA18BD3+?
All MAX6472TA18BD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6472TA18BD3+, 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 MAX6472TA18BD3+ part is unused and in its original packaging.
Return procedure for MAX6472TA18BD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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