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Analog Devices Inc./Maxim Integrated MAX6484BL33BD3
- Part No.:
- MAX6484BL33BD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-UFBGA, CSPBGA
- Datasheet:
-
MAX6484BL33BD3.pdf
- Description:
- IC REG LINEAR LDO WITH MPU RESET
- Quantity:
- Payment:
- Shipping:
Inventory:1,491
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Product details
Overview
MAX6484BL33BD3 from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 3.3V output, ±2.5% output voltage accuracy over -40°C to +85°C, 114mV dropout at 300mA load, and 150ms minimum reset timeout. It features remote feedback (FB) pin for external NPN transistor use in higher-current applications and operates from 2.5V to 5.5V input.
For engineers reviewing the MAX6484BL33BD3 datasheet, MAX6484BL33BD3 pinout, MAX6484BL33BD3 application, or MAX6484BL33BD3 equivalent, key selection criteria include its UCSP package footprint, FB-based remote sensing capability, 75µVRMS output noise (typ), shutdown current of 0.1µA, and compatibility with battery-backed systems requiring brownout detection and manual-reset-free supervision.
Technical Context
The MAX6484BL33BD3 implements a single LDO regulator core with internal reference and error amplifier, paired with a dedicated reset supervisor using the same reference. Its FB pin is electrically isolated from OUT, enabling true remote voltage sensing at the load - critical for maintaining regulation under PCB trace IR drop.
Reset assertion occurs when FB falls below 85%–90% of nominal VOUT (B-grade threshold), with guaranteed 150ms minimum timeout (D3 suffix). The device uses an active-low push-pull or open-drain RESET output, and includes thermal shutdown at +180°C with 20°C hysteresis, plus reverse current protection limiting OUT-to-IN leakage to 0.01µA (typ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.5% over full temperature range - ensures stable core logic supply for 3.3V microcontrollers. |
| Max Output Current | 300mA guaranteed minimum - supports moderate-power SoCs and peripheral ICs without external boost. |
| Dropout Voltage | 114mV at 300mA - enables operation down to VIN = 3.414V, extending battery runtime in single-cell Li-ion or 3× alkaline systems. |
| Supply Current | 82µA operating / 0.1µA shutdown - minimizes quiescent drain in always-on battery monitoring circuits. |
| Reset Threshold | 85%–90% of VOUT (B-grade) - triggers reset before µP enters undefined state during brownout. |
| Reset Timeout | 150ms minimum (D3) - satisfies boot-time stabilization requirements for flash memory and PLL lock sequences. |
| Output Noise | 75µVRMS (10Hz–100kHz) - meets low-noise analog supply needs for ADCs and audio codecs. |
| Package | 3×3mm UCSP (chip-scale) - enables ultra-compact layout in space-constrained portable devices. |
Pinout & Package
MAX6484BL33BD3 is housed in a 3×3mm UCSP (Ultra Compact Silicon Package) with exposed paddle (internally connected to GND). Thermal performance is optimized by soldering the EP pad directly to the PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Regulator input | Bypassed to GND with 0.1µF capacitor; accepts 2.5V–5.5V input; reverse leakage <0.01µA when VOUT > VIN. |
| GND | Ground / thermal pad | Primary electrical return and thermal dissipation path; must be connected to large copper area for thermal management. |
| SHDN | Active-low shutdown control | Pulled high to IN for normal operation; pulls supply current to 0.1µA when driven low. |
| RESET | Active-low reset output | Push-pull configuration; asserts low during power-up, brownout, or SHDN activation; holds for ≥150ms after recovery. |
| FB | Remote feedback sense | Isolated from OUT; connects to load VCC point to compensate for PCB trace drop; enables external NPN pass transistor for >300mA total current. |
| OUT | Regulated output | Delivers 3.3V @ up to 300mA; requires ≥3.3µF ceramic capacitor (ESR <0.2Ω) at pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Remote Feedback (FB) | Enables precise regulation at load point despite PCB IR drop; supports external NPN transistor for scalable current delivery. |
| Low-Noise UCSP Output | 75µVRMS noise (typ) eliminates need for additional LC filtering in sensitive analog/audio rails. |
| Integrated Reset Supervisor | Eliminates discrete supervisor IC; provides factory-trimmed reset threshold and programmable timeout without external RC. |
| Reverse Current Protection | Blocks backfeed from OUT to IN (<0.01µA), preventing battery discharge when external backup sources are present. |
| Thermal Shutdown with Hysteresis | Shuts down at +180°C and re-enables only after cooling to +160°C - prevents thermal runaway during sustained overload. |
| Ultra-Low Shutdown Current | 0.1µA max shutdown current extends shelf life in long-storage IoT sensors and medical disposables. |
Applications
| Handheld Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Portable glucose meters and pulse oximeters powered by coin-cell or single Li-ion batteries. IC Role / Device Role / Timing Role: Primary 3.3V power rail regulator with brownout detection and automatic reset sequencing for MCU and analog front-end. Use Value: 82µA quiescent current extends battery life beyond 12 months; FB pin compensates for trace resistance in compact flex PCBs. | Use Scenario: Ruggedized environmental monitors deployed in remote locations with intermittent solar charging. IC Role / Device Role / Timing Role: System power supervisor ensuring clean startup and safe shutdown during voltage transients from unstable energy harvesters. Use Value: 150ms reset timeout guarantees EEPROM write completion before processor wake; thermal shutdown protects against enclosure overheating. |
| Bluetooth LE Wearables | Smart Meter Communication Modules |
Use Scenario: Fitness trackers with always-on motion sensing and periodic BLE advertising bursts. IC Role / Device Role / Timing Role: Low-noise 3.3V supply for RF transceiver and precision ADC, with reset coordination across sleep/wake cycles. Use Value: 75µVRMS output noise prevents RF desensitization; shutdown mode reduces system standby current to sub-µA levels. | Use Scenario: PLC-connected smart meters using RS-485 or NB-IoT modems requiring robust power sequencing. IC Role / Device Role / Timing Role: Main power regulator with fault detection for modem and metrology ASIC, interfacing with external watchdog via RESET. Use Value: FB pin allows regulation at modem VCC pin, eliminating 50–100mV drop across 2-inch PCB traces; reverse leakage protection isolates backup supercap. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79933DBVR | No integrated reset circuit; requires external supervisor; 200mA output; 40µA IQ; SOT-23-5 package. | Lacks reset timeout and FB pin; suitable only where discrete supervision is acceptable and current demand ≤200mA. | Select only if board space allows separate reset IC and load current is ≤200mA. |
| NCP114AMX33TBG | Includes reset but no FB pin; 300mA output; 90µA IQ; 1.5% initial accuracy; SOT-563 package. | Cannot perform remote sensing or support external pass transistors; reset timeout fixed at 200ms. | Choose when FB functionality is unnecessary and tighter initial accuracy is prioritized over thermal performance. |
Compared with TPS79933DBVR and NCP114AMX33TBG, MAX6484BL33BD3 uniquely combines 300mA capability, remote FB sensing, 150ms programmable reset, and UCSP thermal efficiency - making it optimal for space- and noise-constrained battery-powered systems requiring load-point regulation.
Availability
MAX6484BL33BD3 is available at Aetrix Electronics and suitable for handheld medical sensors, industrial data loggers, Bluetooth LE wearables, and smart meter communication modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX6484BL33BD3 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 environments.
The MAX6469–MAX6484 product line was engineered specifically for battery-powered portable equipment needing integrated power regulation and microprocessor supervision in minimal footprint - targeting PDAs, wireless modules, and instrumentation.
FAQ
What is the function of the FB pin on the MAX6484BL33BD3?
The FB (Feedback) pin on the MAX6484BL33BD3 is electrically isolated from the OUT pin and serves as a remote sense input. It enables regulation at the load point rather than at the IC output, compensating for voltage drop across PCB traces. When used with an external NPN transistor, it also allows scalable current delivery beyond the 300mA internal limit. This functionality is confirmed in the MAX6484BL33BD3 datasheet's Pin Description and Detailed Description sections.
Does the MAX6484BL33BD3 support adjustable output voltage?
No, the MAX6484BL33BD3 does not support adjustable output voltage. Its output is fixed at 3.3V, as indicated by the "L33" suffix per Maxim's Output Voltage Suffix Guide. Devices with SET pin functionality (e.g., MAX6469–MAX6472/MAX6477–MAX6480) support adjustability, but MAX6484BL33BD3 belongs to the FB-equipped variant group (MAX6475/MAX6476/MAX6483/MAX6484) which uses FB for remote sensing-not voltage programming.
What reset timeout period is implemented in the MAX6484BL33BD3?
The MAX6484BL33BD3 implements a 150ms minimum reset timeout period, denoted by the "D3" suffix in its part number. This value is guaranteed across -40°C to +85°C and is independent of input voltage or load conditions. The reset remains asserted for at least 150ms after VOUT rises above the 85%–90% threshold, satisfying boot-sequence timing for most microcontrollers and serial flash devices.
Can the MAX6484BL33BD3 be used with a backup supercapacitor?
Yes, the MAX6484BL33BD3 supports backup supercapacitor operation. When IN is removed, the device maintains ~40µA OUT-to-GND reverse current (typ), allowing the supercap to hold VOUT during battery replacement. RESET asserts during this condition, placing the system in low-power mode. The internal reverse current protection (0.01µA OUT-to-IN leakage) prevents the supercap from discharging into the depleted input source.
What package type is used for the MAX6484BL33BD3?
The MAX6484BL33BD3 is packaged in a 3×3mm UCSP (Ultra Compact Silicon Package) with an exposed thermal paddle. This chip-scale package is specified for the MAX6477–MAX6484 series and offers superior thermal performance versus SOT23 or TDFN alternatives. The EP pad must be soldered to the PCB ground plane to ensure proper heat dissipation and electrical grounding.
MAX6484BL33BD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-UFBGA, CSPBGA
- 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 (3.3V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.18V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 136 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, 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:
- 6-UCSP (1.52x1.52)
MAX6484BL33BD3 FAQ
1.How can I place an order for MAX6484BL33BD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6484BL33BD3 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 MAX6484BL33BD3 reliable?
The price and inventory of MAX6484BL33BD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6484BL33BD3 is usually 5 days.
3.What payment methods are accepted for MAX6484BL33BD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6484BL33BD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6484BL33BD3?
MAX6484BL33BD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6484BL33BD3 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 MAX6484BL33BD3?
For technical support, including MAX6484BL33BD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6484BL33BD3 requirements.
6.How does Aetrix verify that MAX6484BL33BD3 is sourced from the original manufacturer or authorized distributors?
All MAX6484BL33BD3 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 MAX6484BL33BD3 meets industry standards.
7.What is the process for return or replacement of MAX6484BL33BD3?
All MAX6484BL33BD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6484BL33BD3, 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 MAX6484BL33BD3 part is unused and in its original packaging.
Return procedure for MAX6484BL33BD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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