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Analog Devices Inc./Maxim Integrated MAX6472UT18BD3
- Part No.:
- MAX6472UT18BD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX6472UT18BD3.pdf
- Description:
- IC REG LINEAR LDO WITH MPU RESET
- Quantity:
- Payment:
- Shipping:
Inventory:1,496
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Product details
Overview
MAX6472UT18BD3 from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.8V output, -7.5% reset threshold, and 150ms minimum reset timeout. It features 82µA quiescent current, 55mV dropout at 150mA, and operates from -40°C to +85°C. Designed for battery-powered portable electronics requiring precise voltage regulation and reliable power-on reset.
For engineers reviewing the MAX6472UT18BD3 datasheet, MAX6472UT18BD3 pinout, MAX6472UT18BD3 application, or MAX6472UT18BD3 equivalent, key selection criteria include its 1.8V fixed output, active-low open-drain RESET with 150ms timeout, shutdown capability (0.1µA), and UCSP-6 package compatibility with space-constrained handheld and wireless modules.
Technical Context
The MAX6472UT18BD3 implements a single-stage LDO architecture with internal bandgap reference and error amplifier, supporting input voltages from 2.5V to 5.5V. Its reset supervisor uses the same reference as the regulator core, ensuring tight tracking between VOUT and reset threshold (92.5% of nominal VOUT).
It integrates reverse-current protection (0.01µA OUT→IN leakage), thermal shutdown at +180°C with 20°C hysteresis, and current limiting at 450mA (min). The device lacks manual reset (MR) and remote sense (FB) pins-confirmed by its pinout matching the MAX6471/MAX6472 family, not MAX6473+ or MAX6475+ variants.
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 1.8V microcontrollers and FPGAs. |
| Max Output Current | 300mA guaranteed - sufficient to power baseband processors or RF transceivers in Bluetooth/WLAN modules. |
| Dropout Voltage | 55mV at 150mA - enables operation from single-cell Li-ion (3.0V min) down to 1.85V input while maintaining regulation. |
| Quiescent Current | 82µA typical - extends battery life in always-on sensor nodes or standby modes of portable instruments. |
| Reset Threshold | -7.5% of VOUT (92.5% × 1.8V = 1.665V) - asserts RESET before microprocessor supply tolerance violation per JEDEC JESD8-12. |
| Reset Timeout | 150ms minimum - satisfies boot-time requirements for ARM Cortex-M and similar embedded processors. |
| Shutdown Current | 0.1µA typical - enables ultra-low-power deep-sleep states without external disconnect switches. |
| Package | 6-bump UCSP (3mm × 3mm) - supports high-density PCB layouts in compact USB devices and digital cameras. |
Pinout & Package
MAX6472UT18BD3 is housed in a 3mm × 3mm, 6-bump chip-scale package (UCSP™) with exposed paddle thermally connected to GND. Pin assignments are validated per Maxim's official pin description for MAX6471/MAX6472 series.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Bump A1) | Regulator input | Accepts 2.5V–5.5V input; requires 0.1µF ceramic bypass to GND for stability and noise rejection. |
| GND (Bump A2) | Ground reference & thermal path | Must be soldered to large PCB ground plane to dissipate heat and maintain <150°C junction temperature at full load. |
| SHDN (Bump A3) | Active-low shutdown control | Pull low to disable regulator and reduce supply current to 0.1µA; tie to IN for normal operation. |
| RESET (Bump C3) | Active-low open-drain reset output | Sinks up to 3.2mA; requires external pullup to host VCC; asserts during power-up, brownout, or SHDN assertion. |
| FB (Bump C2) | Feedback input for remote sensing | Connected directly to load VCC point to compensate for PCB trace IR drop; enables accurate regulation at point-of-load. |
| OUT (Bump C1) | Regulated output | Delivers 1.8V at up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated microprocessor reset | Eliminates need for discrete supervisor IC; RESET timing fully synchronized to LDO output voltage. |
| Low-noise regulation | 75µVRMS output noise (typ) - meets stringent analog supply requirements for ADCs and audio codecs. |
| Reverse current protection | 0.01µA max OUT→IN leakage - prevents backup battery discharge when main supply is removed. |
| Thermal and short-circuit protection | Auto-recovering shutdown at +180°C and 450mA current limit - ensures robustness in unattended industrial deployments. |
| UCSP packaging | 3mm × 3mm footprint with 0.5mm pitch - reduces board area by >60% vs. SOT23-6 while improving thermal performance. |
Applications
| Handheld Instruments | Bluetooth Modules |
|---|---|
Use Scenario: Powering ARM-based data loggers in field-deployable environmental sensors with coin-cell or Li-ion backup. IC Role / Device Role / Timing Role: Primary 1.8V core supply and system-level power-on reset generator with 150ms timeout aligned to MCU boot ROM execution time. Use Value: Enables reliable cold-start under varying battery voltage (2.8V–4.2V) while maintaining <2.0% output accuracy across operating temperature range. | Use Scenario: Supplying 1.8V I/O and radio subsystems in Class 2 Bluetooth headsets with aggressive size constraints. IC Role / Device Role / Timing Role: Low-quiescent LDO with integrated RESET to coordinate RF transceiver initialization and baseband processor wake-up sequence. Use Value: Reduces BOM count by eliminating separate reset IC and saves 2.5mm² PCB area via UCSP package versus TDFN alternatives. |
| Notebook Subsystems | Digital Cameras |
Use Scenario: Regulating 1.8V supply for embedded controller (EC) and keyboard backlight driver in ultrabook platforms. IC Role / Device Role / Timing Role: Secondary LDO with shutdown control for power-gating EC peripherals during sleep states (S3/S4). Use Value: Achieves 0.1µA shutdown current to meet ACPI S5 deep-sleep leakage budgets without external MOSFET switches. | Use Scenario: Providing clean 1.8V supply to image signal processor (ISP) and CMOS sensor interface in compact action cameras. IC Role / Device Role / Timing Role: Low-noise LDO with remote FB sensing to maintain regulation accuracy despite PCB trace resistance between regulator and ISP die. Use Value: 75µVRMS noise and ±2.0% accuracy prevent image artifacts and timing jitter in high-speed MIPI CSI-2 video streams. |
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 | 1.8V fixed output, 200mA, no integrated reset, 1.5µA IQ, 5-pin DSBGA | Requires external reset IC (e.g., TPS3808G18) for power-on sequencing - increases component count and layout complexity. | Select when ultra-low IQ dominates design priority and reset functionality can be added discretely. |
| ADP160ACBZ-1.8-R7 | 1.8V fixed output, 150mA, no reset, 560nA IQ, 5-pin WLCSP | Lacks reset supervision entirely; unsuitable for systems requiring guaranteed processor initialization timing. | Choose only for non-critical bias rails where reset coordination is handled elsewhere in the power tree. |
Compared with TPS79918YZTR and ADP160ACBZ-1.8-R7, MAX6472UT18BD3 uniquely integrates reset supervision with 150ms timeout and 0.1µA shutdown in a 3×3mm UCSP, enabling single-chip power management for space- and reliability-sensitive portable designs.
Availability
MAX6472UT18BD3 is available at Aetrix Electronics and suitable for handheld instruments, Bluetooth modules, notebook subsystems, and digital cameras requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for MAX6472UT18BD3 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 solutions for industrial, communications, and consumer markets.
The MAX6469–MAX6484 product line was designed specifically for battery-powered portable equipment needing tightly integrated LDO regulation and microprocessor reset in minimal footprint packages like UCSP.
FAQ
What is the exact reset threshold voltage for MAX6472UT18BD3?
The MAX6472UT18BD3 has a -7.5% reset threshold, meaning RESET asserts when VOUT falls below 92.5% of its nominal 1.8V output - i.e., 1.665V. This threshold is factory-trimmed and guaranteed over -40°C to +85°C with ±2.5% tolerance, ensuring reliable detection of brownout conditions before microprocessor malfunction occurs. The MAX6472UT18BD3 uses the 'B' suffix in its ordering code to denote this specific reset accuracy grade.
Does MAX6472UT18BD3 support adjustable output voltage?
No, MAX6472UT18BD3 does not support adjustable output voltage. It is a fixed 1.8V device with internal feedback resistors. Unlike MAX6469–MAX6472 variants with SET pin functionality, MAX6472UT18BD3 belongs to the FB-feedback subgroup (per pinout and datasheet family grouping) and lacks the SET pin - instead using FB for remote sensing only. Its output voltage is permanently set at 1.8V and cannot be modified externally.
What package type and dimensions does MAX6472UT18BD3 use?
MAX6472UT18BD3 uses a 3mm × 3mm, 6-bump UCSP™ (Ultra Compact Silicon Package) with 0.5mm bump pitch and exposed thermal paddle. This chip-scale package provides superior thermal performance versus SOT23-6 and occupies ~60% less PCB area than 8-pin TDFN variants. The exposed paddle must be soldered to a dedicated GND copper pour for effective heat dissipation and EMI reduction.
Can MAX6472UT18BD3 be used with a backup supercapacitor?
Yes, MAX6472UT18BD3 supports backup supercapacitor operation. When the main IN supply is removed, the device maintains regulated 1.8V output from the supercapacitor connected at OUT, drawing only 40µA typical reverse current. RESET remains asserted to place the system in low-power mode until the main supply returns and VOUT exceeds 1.665V. This behavior is explicitly documented in Maxim's "Reverse OUT to Ground Current" section for the MAX6472UT18BD3 family.
Is there a manual reset (MR) input on MAX6472UT18BD3?
No, MAX6472UT18BD3 does not include a manual reset (MR) input. Its pin configuration matches the MAX6471/MAX6472 group, which features IN, GND, SHDN, RESET, FB, and OUT - omitting MR. Devices with MR functionality (e.g., MAX6473/MAX6474) use a different pinout where pin 5 is MR instead of FB. Therefore, MAX6472UT18BD3 relies solely on power-related reset triggers (power-up, brownout, SHDN) and cannot be externally asserted via pushbutton or logic signal.
MAX6472UT18BD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- 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 (1.8V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 136 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, 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:
- SOT-23-6
MAX6472UT18BD3 FAQ
1.How can I place an order for MAX6472UT18BD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6472UT18BD3 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 MAX6472UT18BD3 reliable?
The price and inventory of MAX6472UT18BD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6472UT18BD3 is usually 5 days.
3.What payment methods are accepted for MAX6472UT18BD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6472UT18BD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6472UT18BD3?
MAX6472UT18BD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6472UT18BD3 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 MAX6472UT18BD3?
For technical support, including MAX6472UT18BD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6472UT18BD3 requirements.
6.How does Aetrix verify that MAX6472UT18BD3 is sourced from the original manufacturer or authorized distributors?
All MAX6472UT18BD3 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 MAX6472UT18BD3 meets industry standards.
7.What is the process for return or replacement of MAX6472UT18BD3?
All MAX6472UT18BD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6472UT18BD3, 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 MAX6472UT18BD3 part is unused and in its original packaging.
Return procedure for MAX6472UT18BD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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