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Analog Devices Inc./Maxim Integrated MAX6469UT27AD3
- Part No.:
- MAX6469UT27AD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX6469UT27AD3.pdf
- Description:
- IC REG LINEAR LDO 300MA
- Quantity:
- Payment:
- Shipping:
Inventory:563
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Product details
Overview
MAX6469UT27AD3 from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, delivering a fixed +2.7V output, ±2.7% accuracy over -40°C to +85°C, and 55mV dropout at 150mA. It features active-low push-pull RESET with 150ms timeout, 82µA quiescent current, and shutdown capability reducing supply current to 0.1µA - optimized for battery-powered handheld instruments and USB devices.
For engineers reviewing the MAX6469UT27AD3 datasheet, MAX6469UT27AD3 pinout, MAX6469UT27AD3 application, or MAX6469UT27AD3 equivalent, key selection criteria include its preset 2.7V output, integrated reset supervision with 150ms delay, SOT23-6 package footprint, and shutdown functionality enabling ultra-low-power system sleep states.
Technical Context
The MAX6469UT27AD3 integrates a precision LDO regulator core and a voltage-monitoring reset supervisor sharing the same reference. Its regulator operates from 2.5V to 5.5V input, delivers up to 300mA with guaranteed 55mV dropout at 150mA and 114mV at 300mA, and maintains ±2.7% output voltage accuracy across temperature and load. The reset circuit monitors VOUT directly and asserts active-low RESET when output falls below −7.5% of nominal (i.e., <2.50V for 2.7V output), holding assertion for exactly 150ms (min) after recovery.
This device belongs to the MAX6469–MAX6476 subgroup featuring SHDN and SET pins but no MR or FB terminals. It uses the SET pin tied to GND for fixed-output operation and includes undervoltage lockout (2.25V min), thermal shutdown (180°C), and reverse-current protection (0.01µA OUT→IN leakage). No manual reset or remote sense capability is present.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +2.7V fixed - matches common logic rail for Bluetooth modules and digital cameras |
| Output Accuracy | ±2.7% over −40°C to +85°C - ensures reliable microprocessor supply within spec across industrial temp range |
| Dropout Voltage | 55mV at 150mA - enables stable 2.7V output from 2.755V input, critical for single-cell Li-ion systems |
| Quiescent Current | 82µA - minimizes standby power loss in portable equipment with frequent sleep cycles |
| Reset Threshold | −7.5% of VOUT (2.50V min) - triggers reset before microprocessor brownout, meeting standard tolerance requirements |
| Reset Timeout | 150ms (min) - provides sufficient stabilization time for clock oscillators and memory before processor release |
| Shutdown Current | 0.1µA (typ) - enables true zero-power off-state when paired with external switch control |
| Input Voltage Range | 2.5V to 5.5V - supports direct connection to Li-ion, alkaline, or USB 5V sources without pre-regulation |
Pinout & Package
MAX6469UT27AD3 is packaged in a 6-pin SOT23-6 surface-mount package with exposed paddle (EP) internally connected to GND. Thermal performance is enhanced by soldering EP to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Bypass with 0.1µF capacitor to GND; accepts 2.5V–5.5V input; reverse-current protected |
| 2 GND | Power and thermal ground | Primary return path; must connect to large copper area for heat dissipation and noise reduction |
| 3 SHDN | Active-low shutdown control | Pull low to disable regulator and reduce IQ to 0.1µA; tie to VIN for normal operation |
| 4 RESET | Active-low push-pull reset output | Asserts low during power-up, brownout, or SHDN activation; holds for ≥150ms after recovery |
| 5 SET | Feedback configuration selector | Tied to GND to enable fixed 2.7V output; open or pulled high disables regulation |
| 6 OUT | Regulated output | Delivers up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for stability |
Key Features
| Feature | Design Value |
|---|---|
| Integrated microprocessor reset | Eliminates need for external supervisor IC while guaranteeing reset assertion during power-up, brownout, and shutdown |
| Ultra-low quiescent current | 82µA operating / 0.1µA shutdown enables >1-year battery life in low-duty-cycle IoT sensors |
| Low dropout architecture | 55mV dropout at 150mA allows operation from near-dead batteries (e.g., 2.75V cutoff on 3.0V nominal Li-ion) |
| Reverse current protection | 0.01µA typical OUT→IN leakage prevents backup capacitor or supercap discharge into depleted input source |
| Thermal and short-circuit protection | 180°C shutdown with 20°C hysteresis and 450mA current limit ensure robustness under fault conditions |
| Input voltage lockout | 2.25V UVLO prevents erratic regulator behavior during weak-battery start-up or noisy supply conditions |
Applications
| Handheld Instruments | USB Peripheral Devices |
|---|---|
Use Scenario: Power management in palm-sized test meters with LCD display and wireless telemetry. IC Role / Device Role / Timing Role: Primary 2.7V supply for MCU, ADC, and RF transceiver; RESET ensures clean boot after battery insertion or wake-from-sleep. Use Value: 82µA quiescent current extends AA/AAA battery life beyond 18 months in low-activity mode; 150ms reset timeout guarantees oscillator stabilization before firmware execution. |
Use Scenario: Self-powered USB audio adapter with DAC and headphone amplifier. IC Role / Device Role / Timing Role: Regulates 2.7V rail for digital audio controller; RESET synchronizes firmware initialization with USB enumeration sequence. Use Value: 55mV dropout enables full 300mA delivery from USB 5V via single-stage conversion; push-pull RESET drives µP reset pin directly without pull-up resistor. |
| Bluetooth Modules | Digital Cameras |
Use Scenario: Compact BLE beacon using coin-cell battery and flash memory. IC Role / Device Role / Timing Role: Supplies 2.7V to Bluetooth SoC and EEPROM; SHDN controlled by host MCU to cut power between advertising intervals. Use Value: 0.1µA shutdown current reduces average system current to sub-µA level; −7.5% reset threshold aligns with Nordic nRF52832 VDD tolerance spec. |
Use Scenario: Image sensor and ISP power in compact action camera with auto-on/off. IC Role / Device Role / Timing Role: Provides stable 2.7V for CMOS image sensor interface and embedded controller; RESET coordinates power sequencing with lens motor driver. Use Value: ±2.7% output accuracy ensures sensor analog front-end remains within ADC reference compliance; thermal shutdown prevents overheating during burst capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76327QDBVRQ1 | 200mA output, 120mV dropout at 150mA, 120ms reset timeout, no shutdown pin | Lacks SHDN control; requires external enable logic for ultra-low-power sleep | Choose if system already implements discrete enable control and 200mA load suffices |
| ADM6315-27ARTZ-RL7 | Standalone reset IC only - no LDO; requires external 2.7V regulator | Increases BOM count and board area; adds separate voltage-setting and decoupling components | Choose only when existing design uses discrete LDO and needs reset augmentation |
Compared with TPS76327QDBVRQ1 and ADM6315-27ARTZ-RL7, the MAX6469UT27AD3 uniquely integrates 300mA LDO regulation, programmable reset timeout, and active-low shutdown in a single SOT23-6 package - reducing component count, PCB area, and power-path complexity for space-constrained portable designs.
Availability
MAX6469UT27AD3 is available at Aetrix Electronics and suitable for handheld instruments, USB peripheral devices, and Bluetooth modules requiring stable component supply with long-term manufacturing continuity and RoHS-compliant packaging.
Supply support for MAX6469UT27AD3 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX6469–MAX6484 product line was designed specifically for battery-powered portable electronics needing tightly regulated voltage rails combined with reliable, integrated power-on reset supervision - eliminating discrete supervisors and simplifying power architecture.
FAQ
What output voltage does the MAX6469UT27AD3 deliver, and how is it set?
The MAX6469UT27AD3 delivers a fixed +2.7V output. This is determined by internal feedback resistors and enabled by connecting the SET pin to GND. The '27' in the part number explicitly denotes the 2.7V output variant per Maxim's Output Voltage Suffix Guide. No external resistors are required for this configuration, and the device achieves ±2.7% accuracy across −40°C to +85°C.
Does the MAX6469UT27AD3 support manual reset (MR) functionality?
No, the MAX6469UT27AD3 does not support manual reset. It belongs to the MAX6469/MAX6470/MAX6473–MAX6478/MAX6481–MAX6484 subgroup, which includes SHDN and SET pins but omits the MR pin. Manual reset is only available on MAX6471–MAX6474 and MAX6479–MAX6482 variants. For MAX6469UT27AD3, reset is triggered solely by VOUT drop, input undervoltage, or SHDN assertion.
What is the reset timeout period for the MAX6469UT27AD3, and how is it selected?
The MAX6469UT27AD3 has a reset timeout period of 150ms (minimum), indicated by the 'D3' suffix in the part number. This value is factory-programmed and non-adjustable. The reset output remains asserted for ≥150ms after VOUT recovers above the −7.5% threshold (2.50V), ensuring adequate time for clock oscillators and memory to stabilize before processor release.
Can the MAX6469UT27AD3 be used with a remote sense configuration?
No, the MAX6469UT27AD3 does not support remote sensing. It lacks an FB (feedback) pin and uses direct VOUT monitoring for both regulation and reset detection. Remote sense capability is exclusive to MAX6475/MAX6476/MAX6483/MAX6484 variants, which feature a dedicated FB pin for connecting to the load point and compensating for PCB trace IR drop.
What package type and thermal characteristics apply to the MAX6469UT27AD3?
The MAX6469UT27AD3 is supplied in a 6-pin SOT23-6 package with exposed paddle (EP). At TA = +70°C, its maximum continuous power dissipation is 727mW, derating by 9.1mW/°C above that temperature. The GND pin serves dual electrical and thermal functions; optimal thermal performance requires soldering the EP to a large PCB ground plane to achieve effective junction-to-ambient heat transfer.
MAX6469UT27AD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- 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 (2.7V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- -
- 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:
- SOT-23-6
MAX6469UT27AD3 FAQ
1.How can I place an order for MAX6469UT27AD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6469UT27AD3 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 MAX6469UT27AD3 reliable?
The price and inventory of MAX6469UT27AD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6469UT27AD3 is usually 5 days.
3.What payment methods are accepted for MAX6469UT27AD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6469UT27AD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6469UT27AD3?
MAX6469UT27AD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6469UT27AD3 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 MAX6469UT27AD3?
For technical support, including MAX6469UT27AD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6469UT27AD3 requirements.
6.How does Aetrix verify that MAX6469UT27AD3 is sourced from the original manufacturer or authorized distributors?
All MAX6469UT27AD3 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 MAX6469UT27AD3 meets industry standards.
7.What is the process for return or replacement of MAX6469UT27AD3?
All MAX6469UT27AD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6469UT27AD3, 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 MAX6469UT27AD3 part is unused and in its original packaging.
Return procedure for MAX6469UT27AD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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