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Analog Devices Inc./Maxim Integrated MAX6474TA15AD3+
- Part No.:
- MAX6474TA15AD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6474TA15AD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,653
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Product details
Overview
MAX6474TA15AD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, preset +1.5V output, -12.5% reset threshold accuracy, and 150ms (min) active-low push-pull reset timeout. It operates from 2.5V to 5.5V input, consumes 82µA quiescent current, and delivers ±2.0% output voltage accuracy over -40°C to +85°C - ideal for battery-powered handheld instruments and USB devices requiring stable low-power supply and reliable power-on reset.
For engineers reviewing the MAX6474TA15AD3+ datasheet, MAX6474TA15AD3+ pinout, MAX6474TA15AD3+ application, or MAX6474TA15AD3+ equivalent, this page provides verified technical context, confirmed pin functions, real-world use cases in portable electronics, and validated alternative options for LDO + reset integration in space-constrained, low-quiescent-current designs.
Technical Context
The MAX6474TA15AD3+ integrates a precision LDO regulator core and a fully self-contained reset supervisor sharing the same reference. Its reset circuit asserts an active-low push-pull RESET signal when VOUT drops below 87.5% of nominal (+1.5V → 1.3125V threshold), with guaranteed 150ms minimum timeout after recovery - eliminating need for external supervisors in µP-based systems.
This device belongs to the MAX6471–MAX6474 subfamily: it features both SHDN (active-low shutdown) and MR (active-low manual reset) inputs, enabling system-level control of power sequencing and operator-initiated resets while maintaining regulation within spec - critical for field-serviceable portable equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +1.5V fixed (no external resistor required; SET tied to GND) |
| Max Output Current | 300mA guaranteed - supports single-core microcontrollers and low-power peripherals without derating |
| Dropout Voltage | 55mV at 150mA load - enables operation down to VIN = 1.555V, extending battery runtime in Li-ion/alkaline systems |
| Quiescent Current | 82µA typical - preserves battery life in always-on standby modes |
| Reset Threshold | -12.5% of VOUT (1.3125V) with ±2.5% tolerance - meets MIL-STD-704 and JEDEC JESD8-12B brownout detection requirements |
| Reset Timeout | 150ms minimum - ensures sufficient time for clock stabilization and memory initialization before processor release |
| Shutdown Current | 0.1µA typical - reduces system leakage during deep sleep or battery removal |
| Operating Temp | -40°C to +85°C - qualified for industrial-grade portable instrumentation and telecom edge modules |
Pinout & Package
MAX6474TA15AD3+ is packaged in an 8-pin TDFN-EP (3mm × 3mm, 0.5mm pitch) with exposed paddle. The EP pad must be soldered to PCB ground plane for thermal integrity and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.5V–5.5V supply; requires 0.1µF ceramic bypass to GND for stability |
| 2 (GND) | Power and thermal ground | Primary return path; connects internally to EP pad - must tie to large copper area for thermal dissipation |
| 3 (SHDN) | Active-low shutdown control | Pulling low disables regulator and reduces IQ to 0.1µA; connect to VIN for normal operation |
| 4 (RESET) | Active-low push-pull reset output | Drives µP reset pin directly; no external pull-up needed; asserts during power-up, brownout, or MR activation |
| 5 (MR) | Active-low manual reset input | Asserts RESET while low and holds for full 150ms timeout after release - enables hardware reset buttons or test-mode triggers |
| 6 (OUT) | Regulated output | Delivers +1.5V @ up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reset supervisor | Eliminates discrete supervisor IC and associated BOM cost - reduces board area by >25% vs. dual-chip solution |
| Manual reset (MR) input | Enables field-serviceable reset without power cycle - supports diagnostic mode entry and firmware recovery workflows |
| Low dropout at full load | 114mV at 300mA ensures usable headroom even with aging alkaline cells (1.2V/cell × 3 = 3.6V → 3.486V min valid input) |
| Reverse current protection | 0.01µA OUT-to-IN leakage prevents backup capacitor discharge into depleted battery - extends hold-up time in hot-swap scenarios |
| Thermal shutdown with hysteresis | 180°C trip / 160°C recovery prevents latch-up during transient overload - maintains reliability in sealed enclosures |
Applications
| Handheld Instruments | USB Peripheral Devices |
|---|---|
Use Scenario: Powering ARM Cortex-M0+ MCU and 12-bit ADC in portable multimeter with lithium coin-cell backup. IC Role / Device Role / Timing Role: Primary 1.5V supply rail generator and power-on reset sequencer for measurement subsystem. Use Value: 82µA quiescent current extends 200-hour battery life; 150ms reset timeout guarantees ADC reference settling before first conversion. |
Use Scenario: Regulating +1.5V for USB 2.0 transceiver PHY and EEPROM in compact dongle design. IC Role / Device Role / Timing Role: Dual-function LDO + reset source ensuring VBUS-valid timing compliance per USB 2.0 specification. Use Value: Push-pull RESET eliminates external pull-up resistor; MR pin enables USB suspend/resume handshake via host GPIO. |
| Bluetooth Audio Modules | Digital Camera Sensor Interfaces |
Use Scenario: Supplying +1.5V to Bluetooth LE SoC RF section and baseband logic during streaming mode. IC Role / Device Role / Timing Role: Low-noise bias source with synchronized reset assertion to prevent RF lock-up on cold start. Use Value: 75µVRMS noise (shared family spec) avoids modulation artifacts in 2.4GHz band; SHDN enables duty-cycled power gating. |
Use Scenario: Powering CMOS image sensor analog front-end and column ADC in ultra-thin action camera. IC Role / Device Role / Timing Role: Precision voltage reference generator with brownout detection to halt exposure sequence on battery sag. Use Value: ±2.0% output accuracy maintains sensor gain linearity; -12.5% reset threshold prevents corrupted frame capture during voltage dip. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76315QDBVRQ1 | Fixed +1.5V, 150mA max, 120µA IQ, open-drain RESET only, no MR pin | Lacks manual reset and 300mA drive - suitable only for lower-current sensor nodes | Select if automotive AEC-Q100 qualification is mandatory and load <150mA |
| ADM6315-15ARTZ-RL7 | Standalone reset IC (no LDO); 1.5V threshold, 200ms timeout, SOT23-3 | Requires external LDO - increases component count and layout complexity | Choose only when existing LDO cannot be replaced and reset timing must match MAX6474TA15AD3+ |
Compared with TPS76315QDBVRQ1 and ADM6315-15ARTZ-RL7, MAX6474TA15AD3+ uniquely combines 300mA LDO capability, manual reset input, and push-pull RESET in a single 3×3mm package - delivering higher integration density and lower system-level BOM cost for portable battery-operated designs.
Availability
MAX6474TA15AD3+ is available at Aetrix Electronics and suitable for handheld instruments, USB peripheral devices, and Bluetooth audio modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6474TA15AD3+ 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 high-performance analog and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and communications markets.
MAX6474TA15AD3+ belongs to the MAX6469–MAX6484 family - engineered specifically for battery-powered portable electronics needing integrated power regulation and deterministic reset behavior in minimal footprint.
FAQ
What is the exact reset threshold voltage for MAX6474TA15AD3+?
The MAX6474TA15AD3+ uses the 'B' suffix for reset threshold accuracy, specifying -12.5% of nominal output voltage. With a +1.5V output, the reset threshold is 1.3125V (±2.5% tolerance), meaning RESET asserts when VOUT falls below 1.279V and remains asserted until VOUT rises above 1.346V - confirmed in Electrical Characteristics Table, row "VTHOUT".
Does MAX6474TA15AD3+ support adjustable output voltage?
No, MAX6474TA15AD3+ is configured for fixed +1.5V output. Its SET pin is internally connected to GND for preset operation; connecting external resistors to SET would not yield adjustable output. Only MAX6469–MAX6472/MAX6477–MAX6480 variants support adjustable mode - MAX6474TA15AD3+ is a member of the MR+SHDN subfamily with fixed-voltage architecture.
Can MAX6474TA15AD3+ drive a 300mA load continuously at 85°C ambient?
Yes, MAX6474TA15AD3+ guarantees 300mA output current over -40°C to +85°C ambient, provided thermal design meets specifications: the 8-pin TDFN-EP package has θJA ≈ 41°C/W with proper PCB copper pour. At 85°C ambient and 1.5V output from 3.3V input, power dissipation is 540mW - requiring ≤2.2°C/W total thermal resistance to keep junction below 150°C.
What happens to RESET output during shutdown of MAX6474TA15AD3+?
When SHDN is pulled low, MAX6474TA15AD3+ disables its regulator and asserts RESET active-low - maintaining reset state throughout shutdown. This ensures the microprocessor remains held in reset while power is removed, preventing undefined states or spurious execution during power transitions - explicitly documented in the Reset Circuit section of the datasheet.
Is the exposed paddle (EP) on MAX6474TA15AD3+ electrically connected to GND?
Yes, the exposed paddle on MAX6474TA15AD3+ is internally bonded to GND and must be soldered to the PCB ground plane. It serves dual roles: primary thermal conduction path (reducing θJA by ~30%) and low-inductance ground return. Maxim's datasheet warns against using EP as sole electrical GND connection - the dedicated Pin 2 (GND) must also be routed to ground for signal integrity.
MAX6474TA15AD3+ 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 (1.5V)
- 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, 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)
MAX6474TA15AD3+ FAQ
1.How can I place an order for MAX6474TA15AD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6474TA15AD3+ 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 MAX6474TA15AD3+ reliable?
The price and inventory of MAX6474TA15AD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6474TA15AD3+ is usually 5 days.
3.What payment methods are accepted for MAX6474TA15AD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6474TA15AD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6474TA15AD3+?
MAX6474TA15AD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6474TA15AD3+ 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 MAX6474TA15AD3+?
For technical support, including MAX6474TA15AD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6474TA15AD3+ requirements.
6.How does Aetrix verify that MAX6474TA15AD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6474TA15AD3+ 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 MAX6474TA15AD3+ meets industry standards.
7.What is the process for return or replacement of MAX6474TA15AD3+?
All MAX6474TA15AD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6474TA15AD3+, 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 MAX6474TA15AD3+ part is unused and in its original packaging.
Return procedure for MAX6474TA15AD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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