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Analog Devices Inc./Maxim Integrated MAX6472TA33BD3+
- Part No.:
- MAX6472TA33BD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6472TA33BD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,445
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Product details
Overview
MAX6472TA33BD3+ 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 -40°C to +85°C, 114mV dropout at 300mA load, and 150ms minimum reset timeout. It delivers stable power and reliable reset signaling for battery-powered microprocessor systems in portable electronics.
For engineers reviewing the MAX6472TA33BD3+ datasheet, MAX6472TA33BD3+ pinout, MAX6472TA33BD3+ application, or MAX6472TA33BD3+ equivalent, key selection considerations include its active-low open-drain RESET output, SHDN-controlled 0.1µA shutdown current, 82µA quiescent supply current, and compatibility with 2.5V–5.5V input rails in space-constrained SOT23-6 layouts.
Technical Context
The MAX6472TA33BD3+ integrates a precision LDO regulator core and a dedicated reset supervisor sharing the same reference. Its reset circuit monitors VOUT against a -7.5% threshold (A-suffix), asserts active-low RESET for ≥150ms after recovery, and supports shutdown via SHDN pin - all while maintaining 82µA ground current under no load and 96µA at full 300mA load.
This device belongs to the MAX6471–MAX6474 subfamily: it features SHDN (not MR) and uses SET for fixed/adjustable mode selection, but does not include manual reset or remote sense functionality. Its thermal shutdown activates at +180°C with 20°C hysteresis, and reverse current protection limits OUT-to-IN leakage to 0.01µA typical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.0% over -40°C to +85°C - ensures stable µP core rail within JEDEC-compliant tolerance bands. |
| Max Output Current | 300mA guaranteed - sufficient to power ARM Cortex-M series MCUs and associated peripherals without external boost. |
| Dropout Voltage | 114mV at 300mA - enables operation from single-cell Li-ion (3.0V min) or three-alkaline (4.5V) sources with margin. |
| Supply Current | 82µA typical (no load), 96µA at 300mA - extends battery life in always-on sensor nodes and standby modes. |
| Reset Threshold | -7.5% of VOUT (A-suffix) - triggers RESET before µP supply violation per Intel/ARM brownout specifications. |
| Reset Timeout | 150ms minimum (D3-suffix) - satisfies boot-time stabilization requirements for flash memory and PLL lock sequences. |
| Shutdown Current | 0.1µA typical - reduces system static power to nanoampere level during deep sleep or transport mode. |
| Input Voltage Range | 2.5V to 5.5V - compatible with USB VBUS, Li-ion, and multi-cell alkaline/battery stacks without pre-regulation. |
Pinout & Package
MAX6472TA33BD3+ is housed in a 6-pin SOT23-6 package with exposed pad (EP) internally connected to GND for thermal management. Pin 1 = IN, Pin 2 = GND, Pin 3 = SHDN, Pin 4 = RESET (open-drain active-low), Pin 5 = SET, Pin 6 = OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.5V–5.5V unregulated source; requires 0.1µF ceramic bypass to GND for stability. |
| 2 (GND) | Power and thermal ground | Primary return path and heatsink; must connect to large PCB copper area for thermal dissipation. |
| 3 (SHDN) | Active-low shutdown control | Pull low to disable regulator and reduce IQ to 0.1µA; tie to IN for normal operation. |
| 4 (RESET) | Open-drain reset output | Asserts low when VOUT < 3.0525V (3.3V × 92.5%) or during startup/shutdown; requires external pullup. |
| 5 (SET) | Feedback configuration select | Connect to GND for fixed 3.3V output; leave floating or connect divider for adjustable mode (not used here). |
| 6 (OUT) | Regulated output | Delivers 3.3V @ up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated µP reset supervisor | Eliminates need for discrete supervisor IC - reduces BOM count and layout area in compact handheld designs. |
| Low 82µA quiescent current | Enables >1-year battery life in coin-cell-powered IoT sensors operating at 10µA average system current. |
| 150ms reset timeout (D3) | Guarantees sufficient time for oscillator stabilization and memory initialization before processor release. |
| Thermal and short-circuit protection | Prevents field failure during solder rework or accidental output short - no external current-limiting components needed. |
| Reverse current blocking | 0.01µA OUT-to-IN leakage prevents backup battery discharge when main supply is removed. |
| ±2.0% output accuracy over temp | Meets tight tolerance requirements for FPGA I/O banks and high-speed SerDes power domains. |
Applications
| Handheld Medical Sensors | USB-Powered Test Equipment |
|---|---|
Use Scenario: Continuous glucose monitor with BLE radio and low-power MCU operating from CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 3.3V power rail generator and system reset arbiter during cold start and battery insertion. Use Value: 82µA IQ extends battery life beyond 18 months; 150ms RESET ensures reliable BLE stack initialization before RF transmission. |
Use Scenario: Portable oscilloscope module drawing power exclusively from USB 2.0 VBUS (4.75–5.25V). IC Role / Device Role / Timing Role: Converts USB VBUS to clean 3.3V for ADC reference and FPGA configuration, with synchronized reset assertion on plug-in. Use Value: 114mV dropout allows full 3.3V regulation even at USB low-end 4.75V; open-drain RESET interfaces directly to FPGA's PROG_B pin. |
| Industrial Wireless Gateways | Smart Energy Meters |
Use Scenario: LoRaWAN edge node with dual-core MCU, RF transceiver, and real-time clock, powered by primary lithium thionyl chloride battery. IC Role / Device Role / Timing Role: Main system regulator with brownout detection and controlled reset sequencing during battery voltage sag. Use Value: -7.5% reset threshold (3.0525V) detects early battery depletion; SHDN enables firmware-controlled deep sleep with 0.1µA system standby. |
Use Scenario: ANSI C12.22-compliant electricity meter with tamper-detection circuitry and nonvolatile memory retention. IC Role / Device Role / Timing Role: Supplies 3.3V to metrology ASIC and secure element; asserts RESET during mains loss to trigger backup capacitor hold-up. Use Value: Reverse current blocking preserves supercapacitor charge during AC failure; thermal shutdown prevents damage during enclosure overheating. |
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., TPS3809); 100mA max output; 120mV dropout at 100mA. | Lacks built-in reset logic - increases component count and board area; suitable only where reset timing is externally managed. | Select when cost sensitivity outweighs integration benefit and system reset is already handled elsewhere. |
| NCP302LSN33T1G | Fixed 3.3V, 150mA, no reset function; 250mV dropout at 150mA; 120µA IQ; SOT23-5 (no SHDN pin). | Cannot replace reset functionality - requires separate supervisor IC; lower current rating limits use with modern MCUs. | Consider only for legacy designs with light loads (<100mA) and existing discrete reset architecture. |
Compared with TPS76333DBVR and NCP302LSN33T1G, the MAX6472TA33BD3+ uniquely combines 300mA drive, integrated -7.5% reset with 150ms timeout, and 0.1µA shutdown in a single SOT23-6 footprint - reducing total solution size by ≥30% and eliminating timing mismatch risks between discrete LDO and supervisor.
Availability
MAX6472TA33BD3+ is available at Aetrix Electronics and suitable for handheld medical sensors, USB-powered test equipment, industrial wireless gateways, and smart energy meters requiring stable component supply across extended production lifecycles.
Supply support for MAX6472TA33BD3+ 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 and mixed-signal ICs for power management, sensing, and connectivity in demanding industrial and portable applications.
The MAX6469–MAX6484 family was engineered specifically for battery-powered microprocessor systems needing ultra-low quiescent current, integrated reset supervision, and robust protection - targeting handheld instruments, telecom modules, and embedded computing.
FAQ
What is the reset threshold accuracy and timeout period for MAX6472TA33BD3+?
The MAX6472TA33BD3+ uses the 'A' suffix indicating a -7.5% reset threshold (i.e., RESET asserts when VOUT falls below 3.0525V) and the 'D3' suffix specifying a 150ms minimum reset timeout period. This combination ensures compliance with common microprocessor brownout detection requirements while providing sufficient margin for oscillator startup and memory initialization sequences in the MAX6472TA33BD3+ design.
Does MAX6472TA33BD3+ support adjustable output voltage?
Yes, the MAX6472TA33BD3+ supports adjustable output via the SET pin, though it is configured for fixed 3.3V operation in this variant. When SET is connected to GND, the internal resistor divider sets VOUT to 3.3V. To adjust output, disconnect SET from GND and connect an external resistor divider between OUT, SET, and GND using VSET = 1.23V reference - enabling outputs from 1.25V to 5.5V in the MAX6472TA33BD3+.
What package type and pin count does MAX6472TA33BD3+ use?
The MAX6472TA33BD3+ is packaged in a 6-pin SOT23-6 with exposed thermal pad (EP), where EP is internally connected to GND. Pinout is: Pin 1 = IN, Pin 2 = GND, Pin 3 = SHDN, Pin 4 = RESET (open-drain active-low), Pin 5 = SET, Pin 6 = OUT. This compact footprint enables high-density layouts in space-constrained portable devices using the MAX6472TA33BD3+.
How does the shutdown feature work on MAX6472TA33BD3+?
The MAX6472TA33BD3+ implements active-low shutdown via the SHDN pin: pulling SHDN low disables the regulator, reducing supply current to 0.1µA typical. During shutdown, both the pass transistor and internal reference are turned off. For normal operation, SHDN must be tied to IN or driven high. This feature enables firmware-controlled power gating in battery-powered systems using the MAX6472TA33BD3+.
Is MAX6472TA33BD3+ RoHS-compliant and lead-free?
Yes, MAX6472TA33BD3+ is RoHS-compliant and lead(Pb)-free. The '+' suffix in the part number explicitly denotes the lead-free/RoHS-compliant version per Maxim Integrated's ordering convention. It meets JEDEC J-STD-020C reflow profile requirements for Pb-free packages, with peak solder temperature rated at +260°C - confirmed in the official MAX6469–MAX6484 datasheet for the MAX6472TA33BD3+.
MAX6472TA33BD3+ 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
- 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)
MAX6472TA33BD3+ FAQ
1.How can I place an order for MAX6472TA33BD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6472TA33BD3+ 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 MAX6472TA33BD3+ reliable?
The price and inventory of MAX6472TA33BD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6472TA33BD3+ is usually 5 days.
3.What payment methods are accepted for MAX6472TA33BD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6472TA33BD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6472TA33BD3+?
MAX6472TA33BD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6472TA33BD3+ 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 MAX6472TA33BD3+?
For technical support, including MAX6472TA33BD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6472TA33BD3+ requirements.
6.How does Aetrix verify that MAX6472TA33BD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6472TA33BD3+ 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 MAX6472TA33BD3+ meets industry standards.
7.What is the process for return or replacement of MAX6472TA33BD3+?
All MAX6472TA33BD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6472TA33BD3+, 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 MAX6472TA33BD3+ part is unused and in its original packaging.
Return procedure for MAX6472TA33BD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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