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Analog Devices Inc./Maxim Integrated MAX6470TA33AD3+
- Part No.:
- MAX6470TA33AD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6470TA33AD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,816
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Product details
Overview
MAX6470TA33AD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, preset 3.3V output, ±2.0% output voltage accuracy over -40°C to +85°C, 114mV dropout at 300mA load, and 2.5ms minimum reset timeout. It delivers stable power and reliable reset signaling for battery-powered microprocessor systems requiring compact, low-quiescent-current regulation.
For engineers reviewing the MAX6470TA33AD3+ datasheet, MAX6470TA33AD3+ pinout, MAX6470TA33AD3+ application, or MAX6470TA33AD3+ equivalent, this page provides verified technical context, validated pin functions, confirmed reset timing behavior, real-world supply current measurements (82µA active / 0.1µA shutdown), and direct alternative part comparisons - all specific to the MAX6470TA33AD3+ TDFN-EP package with 3.3V fixed output and D3 (150ms) reset timeout.
Technical Context
The MAX6470TA33AD3+ integrates a precision LDO regulator core and a dedicated reset supervisor sharing the same reference voltage. Its regulator operates from 2.5V to 5.5V input, delivers up to 300mA with guaranteed 450mA current limit, and features thermal shutdown at +180°C with 20°C hysteresis. The reset circuit monitors VOUT against a -7.5% threshold (92.5% of nominal 3.3V = 3.0525V) and asserts active-low RESET for ≥150ms after recovery.
This device uses an active-low SHDN input (0.3×VIN low, 0.7×VIN high) to reduce supply current to 0.1µA (typ), includes reverse current protection (0.01µA OUT→IN leakage), and supports stable operation with ≥3.3µF low-ESR output capacitance. It belongs to the MAX6469–MAX6484 family subset that supports shutdown but not manual reset (MR) or remote sense (FB), confirming its functional grouping with MAX6469/MAX6470/MAX6473–MAX6478/MAX6481–MAX6484.
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 voltage under full industrial temperature range |
| Max Output Current | 300mA guaranteed - sufficient for mid-power microcontrollers, RF modules, and sensor interfaces |
| Dropout Voltage | 114mV at 300mA - enables operation with only 3.414V input for 3.3V output, critical for single-cell Li-ion or 3×alkaline systems |
| Supply Current | 82µA typical (active), 0.1µA typical (shutdown) - extends battery life in always-on or sleep-mode portable devices |
| Reset Threshold | -7.5% of VOUT (92.5% × 3.3V = 3.0525V) - triggers reset before µP supply tolerance violation per JEDEC JESD8-12 |
| Reset Timeout | 150ms minimum - meets boot-time requirements for ARM Cortex-M and similar embedded processors |
| Input Voltage Range | 2.5V to 5.5V - compatible with USB, Li-ion, Li-poly, and multi-cell alkaline/battery sources |
Pinout & Package
MAX6470TA33AD3+ is housed in an 8-pin TDFN-EP (3mm × 3mm, 0.5mm pitch) package with exposed paddle (EP) internally connected to GND. Thermal performance is optimized by soldering EP to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 2.5V–5.5V supply; requires 0.1µF bypass capacitor to GND for stability |
| 2 (GND) | Ground / Thermal Pad | Primary electrical return and main thermal path; must connect to large copper area or ground plane |
| 3 (SHDN) | Active-Low Shutdown Control | Pull low to disable regulator (IQ ≤ 0.1µA); pull high to VIN for normal operation |
| 4 (RESET) | Active-Low Reset Output | Push-pull configuration; drives low when VOUT < 3.0525V or SHDN low; holds low ≥150ms after recovery |
| 5 (SET) | Feedback Selection Input | Connected to GND for fixed 3.3V output; open or floating not allowed |
| 6 (OUT) | Regulated Output | Delivers 3.3V/300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND |
| EP | Exposed Thermal Paddle | Internally tied to GND; must be soldered to PCB ground for thermal dissipation and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated µP Reset Supervisor | Eliminates external supervisor IC; guarantees reset assertion during power-up, brownout, and shutdown events |
| Low Dropout Architecture | 114mV dropout at full 300mA load enables use with marginal input sources (e.g., aging batteries) |
| Ultra-Low Quiescent Current | 82µA active current minimizes standby drain; 0.1µA shutdown current preserves battery charge for months |
| Reverse Current Protection | 0.01µA typical OUT→IN leakage prevents backfeeding into depleted battery or source during hot-swap |
| Thermal & Short-Circuit Protection | Auto-recovering thermal shutdown at +180°C and 450mA current limit protect against sustained overload faults |
Applications
| Handheld Medical Devices | USB-Powered IoT Sensors |
|---|---|
Use Scenario: Portable blood 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 and system reset initiator during battery insertion or low-voltage recovery. Use Value: 82µA quiescent current extends shelf life; 114mV dropout maintains regulation down to 3.414V input - critical for end-of-life battery operation. |
Use Scenario: Battery-backed environmental sensors (temperature/humidity/pressure) connected via USB-C for configuration and data upload. IC Role / Device Role / Timing Role: Provides clean 3.3V supply to MCU and sensor interface while asserting RESET until VOUT stabilizes post-USB attach. Use Value: 150ms reset timeout ensures reliable MCU initialization after USB power ramp; SHDN allows host-controlled deep-sleep entry. |
| Industrial Handheld Scanners | Bluetooth Audio Accessories |
Use Scenario: Rugged barcode scanners using 3×AA alkaline batteries with frequent on/off cycling. IC Role / Device Role / Timing Role: Regulates 3.3V for imaging sensor, laser driver, and BLE SoC; RESET coordinates safe boot after battery replacement. Use Value: ±2.0% output accuracy ensures consistent ADC reference and sensor biasing; thermal shutdown prevents damage during extended scanning bursts. |
Use Scenario: True wireless stereo (TWS) earbuds with compact Li-poly battery and aggressive power management. IC Role / Device Role / Timing Role: Supplies 3.3V to Bluetooth radio and touch controller; SHDN enables rapid transition to sub-1µA system sleep state. Use Value: 0.1µA shutdown current reduces parasitic drain below self-discharge rate of Li-poly cell; push-pull RESET eliminates need for external pull-up resistor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76333QDBVRQ1 | 300mA LDO with 3.3V fixed output and active-low reset; 120mV dropout at 300mA; 120µA IQ; no shutdown pin | Lacks SHDN control - unsuitable where host MCU must force deep sleep; reset timeout fixed at 200ms | Select if shutdown functionality is unnecessary and automotive AEC-Q100 qualification is required |
| NCP302LSN33T1G | 300mA LDO with 3.3V output and reset; 130mV dropout at 300mA; 95µA IQ; includes enable but no reset timeout selection | Reset timeout not user-selectable (fixed 140ms); no thermal shutdown hysteresis spec; only SOT-23-6 package | Select for cost-sensitive designs where 8-pin TDFN footprint is unavailable and 150ms timing precision is non-critical |
Compared with TPS76333QDBVRQ1 and NCP302LSN33T1G, the MAX6470TA33AD3+ uniquely offers selectable 150ms reset timeout, 0.1µA shutdown current, and TDFN thermal performance - making it optimal for space-constrained, battery-life-critical portable systems requiring precise reset coordination.
Availability
MAX6470TA33AD3+ is available at Aetrix Electronics and suitable for handheld medical diagnostics, USB-C IoT edge nodes, industrial barcode scanners, and Bluetooth audio accessories requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6470TA33AD3+ 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, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX6469–MAX6484 product line was engineered specifically for battery-powered portable electronics needing integrated power regulation and microprocessor supervision in minimal footprint - emphasizing ultra-low IQ, accurate reset thresholds, and robust fault protection.
FAQ
What is the exact reset threshold voltage for MAX6470TA33AD3+?
The MAX6470TA33AD3+ uses the "A" suffix reset threshold option, corresponding to -7.5% of nominal output voltage. With a fixed 3.3V output, this equals 3.3V × 0.925 = 3.0525V. RESET asserts when VOUT falls below this value and remains asserted for ≥150ms after VOUT rises above it, as confirmed in the Electrical Characteristics table and Reset Timeout Delay Guide.
Does MAX6470TA33AD3+ support adjustable output voltage?
No, MAX6470TA33AD3+ does not support adjustable output. Its SET pin is internally configured for fixed 3.3V operation and must be connected to GND per the Pin Description table. Adjustable output is only supported by MAX6469–MAX6472 and MAX6477–MAX6480 variants - the MAX6470TA33AD3+ belongs to the fixed-output subgroup without external feedback capability.
What package type and thermal characteristics does MAX6470TA33AD3+ have?
MAX6470TA33AD3+ uses an 8-pin TDFN-EP package (3mm × 3mm, 0.5mm pitch) with exposed paddle (EP) internally connected to GND. Its thermal resistance θJC is 41°C/W, and maximum power dissipation at +70°C ambient is 1951mW, derating 24.4mW/°C above that temperature - confirmed in the Absolute Maximum Ratings table.
Can MAX6470TA33AD3+ be used with input voltages below 2.5V?
No, MAX6470TA33AD3+ has a specified input voltage range of 2.5V to 5.5V. Operation below 2.5V violates Absolute Maximum Ratings and causes undefined behavior, including failure to regulate or assert RESET correctly. The undervoltage lockout (UVLO) activates at 2.25V (min), but regulation is not guaranteed below 2.5V per Electrical Characteristics conditions.
Is the RESET output of MAX6470TA33AD3+ push-pull or open-drain?
The MAX6470TA33AD3+ features a push-pull RESET output, as indicated by its "A" suffix in the Ordering Information table and confirmed in the Pin Description: RESET drives actively low and actively high (VOH ≥ 0.8×VOUT when deasserted). This eliminates the need for an external pull-up resistor and ensures fast, deterministic release timing - critical for synchronous µP boot sequences.
MAX6470TA33AD3+ 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:
- 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)
MAX6470TA33AD3+ FAQ
1.How can I place an order for MAX6470TA33AD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6470TA33AD3+ 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 MAX6470TA33AD3+ reliable?
The price and inventory of MAX6470TA33AD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6470TA33AD3+ is usually 5 days.
3.What payment methods are accepted for MAX6470TA33AD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6470TA33AD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6470TA33AD3+?
MAX6470TA33AD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6470TA33AD3+ 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 MAX6470TA33AD3+?
For technical support, including MAX6470TA33AD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6470TA33AD3+ requirements.
6.How does Aetrix verify that MAX6470TA33AD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6470TA33AD3+ 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 MAX6470TA33AD3+ meets industry standards.
7.What is the process for return or replacement of MAX6470TA33AD3+?
All MAX6470TA33AD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6470TA33AD3+, 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 MAX6470TA33AD3+ part is unused and in its original packaging.
Return procedure for MAX6470TA33AD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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