My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6476TA28AD3+
- Part No.:
- MAX6476TA28AD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6476TA28AD3+.pdf
- Description:
- FIXED/ADJUSTABLE POSITIVE LDO
- Quantity:
- Payment:
- Shipping:
Inventory:2,646
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6476TA28AD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 2.8V output, -7.5% reset threshold, and 150ms minimum reset timeout. It features 82µA quiescent current, 137mV dropout at 300mA load, and shutdown mode drawing 0.1µA. Designed for battery-powered portable equipment including Bluetooth modules and digital cameras.
For engineers reviewing the MAX6476TA28AD3+ datasheet, MAX6476TA28AD3+ pinout, MAX6476TA28AD3+ application, or MAX6476TA28AD3+ equivalent, key selection considerations include its remote feedback (FB) pin for external NPN transistor use, active-low open-drain/push-pull RESET output, SHDN-controlled shutdown, and guaranteed ±2.7% output voltage accuracy over -40°C to +85°C.
Technical Context
The MAX6476TA28AD3+ integrates a precision LDO regulator core and a fully self-contained reset supervisor sharing the same reference. Its FB pin connects directly to the external load (VCC), enabling remote sensing and high-current extension via an external NPN transistor - unlike SET-based variants. The reset circuit asserts when FB falls below 92.5% of nominal VOUT (i.e., 2.59V for 2.8V output) and holds RESET low for ≥150ms after recovery.
This variant belongs to the MAX6475/MAX6476/MAX6483/MAX6484 subgroup featuring FB instead of SET, eliminating internal feedback connection to OUT. It uses an 8-pin TDFN-EP package with exposed paddle, supports 2.5V–5.5V input, and includes thermal shutdown (180°C trip), short-circuit protection, and reverse current blocking (0.01µA OUT→IN leakage).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±2.7% over -40°C to +85°C - ensures stable core logic supply for 2.8V I/O domains. |
| Max Output Current | 300mA guaranteed - sufficient for mid-power microcontrollers and RF ICs without external pass devices. |
| Dropout Voltage | 137mV at 300mA (VOUT = 2.8V) - enables operation down to VIN = 2.937V, critical for single-cell Li-ion or alkaline systems. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring circuits; drops to 0.1µA in shutdown mode. |
| Reset Threshold | -7.5% of VOUT (92.5% of 2.8V = 2.59V) - meets standard µP supply tolerance requirements before asserting RESET. |
| Reset Timeout | 150ms minimum - satisfies boot-time sequencing requirements for ARM Cortex-M and similar processors. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), 3× alkaline (3.6–4.5V), and USB-powered systems. |
Pinout & Package
MAX6476TA28AD3+ is housed in an 8-pin TDFN-EP (3mm × 3mm) package with exposed thermal pad (EP) internally connected to GND. The EP must be soldered to a PCB ground plane for thermal management and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 2.5–5.5V input; requires 0.1µF bypass capacitor to GND for stability. |
| 2 (GND) | Ground / Thermal Pad Anchor | Primary return path and thermal conduction node; must connect to large copper area. |
| 3 (SHDN) | Active-Low Shutdown Control | Pulling low disables regulator and reduces supply current to ≤0.1µA; tied to VIN for normal operation. |
| 4 (RESET) | Active-Low Reset Output | Open-drain or push-pull configuration; sinks 3.2mA at 0.4V max when asserted; asserts when FB < 2.59V. |
| 5 (FB) | Remote Feedback Sense | Connects directly to load VCC point - enables true remote voltage regulation and external NPN current boosting. |
| 6 (OUT) | Regulator Output | Delivers regulated 2.8V; requires ≥3.3µF low-ESR ceramic output capacitor referenced to GND. |
| 7,8 (NC) | No Connect | Not internally bonded; left unconnected per datasheet. |
| EP | Exposed Thermal Paddle | Internally tied to GND; must be soldered to PCB ground plane for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Remote Feedback (FB) Pin | Enables direct connection to load VCC for accurate remote sensing and supports external NPN transistor for >300mA total current delivery. |
| Integrated Microprocessor Reset | Eliminates need for discrete supervisor IC; provides factory-trimmed -7.5% reset threshold and selectable 150ms timeout. |
| Ultra-Low Quiescent Current | 82µA operating / 0.1µA shutdown - preserves battery capacity in standby and sleep modes of portable devices. |
| Reverse Current Protection | 0.01µA typical OUT→IN leakage - prevents back-feeding and battery drain when external sources power the load. |
| Thermal & Short-Circuit Protection | 180°C thermal shutdown with 20°C hysteresis and 450mA current limit - ensures robustness under fault conditions without external components. |
Applications
| Bluetooth Module Power Management | Digital Camera Core Logic Supply |
|---|---|
Use Scenario: Powering baseband processor and RF transceiver in compact Bluetooth 5.x modules where board space and battery life are constrained. IC Role / Device Role / Timing Role: Primary 2.8V LDO with integrated reset supervision; FB pin senses voltage at SoC VDD_IO rail to compensate for PCB trace IR drop. Use Value: Eliminates separate supervisor IC and improves voltage regulation accuracy at point-of-load, reducing brownout resets during RF transmit bursts. |
Use Scenario: Supplying image sensor interface and ISP core in consumer digital cameras powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Main 2.8V regulator with 150ms reset timeout ensuring clean boot after battery insertion or wake-from-sleep. Use Value: 137mV dropout allows sustained operation down to 2.94V input, extending usable battery range by ~8% compared to higher-dropout alternatives. |
| USB-Powered Industrial Sensor Node | Handheld Medical Instrument Display |
Use Scenario: Regulating 2.8V for MCU, ADC, and wireless transceiver in USB-powered environmental sensors deployed in field installations. IC Role / Device Role / Timing Role: LDO with SHDN control for deep-sleep mode and RESET output synchronized to USB enumeration timing. Use Value: 0.1µA shutdown current enables multi-year operation on supercapacitor backup during USB disconnect events. |
Use Scenario: Providing stable 2.8V supply to OLED display driver and touch controller in battery-operated handheld diagnostics tools. IC Role / Device Role / Timing Role: Critical power rail with remote FB sensing to maintain display contrast and touch response across varying load currents. Use Value: Remote feedback compensates for up to 150mV PCB drop, preventing display flicker during backlight activation pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6476TA28AD4+ | Same 2.8V output and FB architecture, but 1200ms reset timeout (vs. 150ms) | Suitable for systems requiring longer reset hold time during slow-ramping supplies or cold-start conditions | Select only if extended reset duration is required; not drop-in for timing-critical boot sequences. |
| TPS799285DRVR | 2.85V fixed LDO (±2%) with 200mA output, no integrated reset or FB pin; requires external supervisor | Lower cost for simple regulation-only use cases; lacks reset integration and remote sensing capability | Choose when reset functionality is handled elsewhere and 200mA suffices; adds BOM count and layout complexity. |
Compared with MAX6476TA28AD3+, the MAX6476TA28AD4+ offers longer reset assertion for marginal supply conditions but risks violating boot timing in fast-starting systems, while the TPS799285DRVR reduces integration level and requires external components to match basic reset functionality.
Availability
MAX6476TA28AD3+ is available at Aetrix Electronics and suitable for Bluetooth modules, digital cameras, USB-powered sensor nodes, and handheld medical instruments requiring stable component supply with long-term lifecycle support.
Supply support for MAX6476TA28AD3+ 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, automotive, and portable applications.
The MAX6469–MAX6484 product line delivers highly integrated, ultra-low-quiescent-current LDO regulators with built-in reset supervision - specifically engineered for space-constrained, battery-sensitive portable electronics.
FAQ
What is the function of the FB pin on the MAX6476TA28AD3+?
The FB (Feedback) pin on the MAX6476TA28AD3+ is a remote sense input that connects directly to the load's VCC point-not to the OUT pin-enabling precise regulation at the point of load. This compensates for PCB trace resistance and voltage drop, and supports external NPN transistor configurations for current boosting beyond 300mA. Unlike SET-based variants, FB is not internally tied to OUT.
Does the MAX6476TA28AD3+ support both open-drain and push-pull RESET outputs?
Yes, the MAX6476TA28AD3+ supports both configurations: the RESET pin can be used as either an open-drain output (requiring an external pullup) or a push-pull output (internally driven high/low), selected at manufacture via part number suffix. The D3 suffix in MAX6476TA28AD3+ indicates the 150ms timeout version but does not encode output type; consult the specific device marking or ordering code for RESET topology.
What is the minimum input voltage required for the MAX6476TA28AD3+ to maintain 2.8V output at 300mA?
The MAX6476TA28AD3+ requires a minimum input voltage of 2.937V to sustain 2.8V output at 300mA load, based on its specified 137mV dropout voltage at that condition. Below this, regulation fails and VOUT drops linearly with VIN. For reliable operation across temperature and process variation, design margin recommends VIN ≥ 3.0V under full load.
How does the MAX6476TA28AD3+ handle reverse current when the output is powered externally?
The MAX6476TA28AD3+ blocks reverse current from OUT to IN with only 0.01µA typical leakage, preventing battery back-feeding or unintended power sourcing. When OUT > IN, the internal pass transistor and parasitic diode turn off. RESET asserts until IN exceeds OUT and FB rises above 2.59V, ensuring system safety during backup power transitions.
Can the MAX6476TA28AD3+ be used without connecting the exposed paddle (EP)?
No - the exposed paddle (EP) on the MAX6476TA28AD3+ is internally connected to GND and serves as the primary thermal conduction path. Leaving it unconnected violates Absolute Maximum Ratings, severely degrades thermal performance, and risks junction overheating (>150°C) even at moderate loads. EP must be soldered to a dedicated PCB ground plane with adequate copper area and thermal vias.
MAX6476TA28AD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- 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 (2.8V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.21V @ 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:
- 8-TDFN-EP (3x3)
MAX6476TA28AD3+ FAQ
1.How can I place an order for MAX6476TA28AD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6476TA28AD3+ 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 MAX6476TA28AD3+ reliable?
The price and inventory of MAX6476TA28AD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6476TA28AD3+ is usually 5 days.
3.What payment methods are accepted for MAX6476TA28AD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6476TA28AD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6476TA28AD3+?
MAX6476TA28AD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6476TA28AD3+ 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 MAX6476TA28AD3+?
For technical support, including MAX6476TA28AD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6476TA28AD3+ requirements.
6.How does Aetrix verify that MAX6476TA28AD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6476TA28AD3+ 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 MAX6476TA28AD3+ meets industry standards.
7.What is the process for return or replacement of MAX6476TA28AD3+?
All MAX6476TA28AD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6476TA28AD3+, 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 MAX6476TA28AD3+ part is unused and in its original packaging.
Return procedure for MAX6476TA28AD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6476TA28AD3+ Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
