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Analog Devices Inc./Maxim Integrated MAX8569BETT+T
- Part No.:
- MAX8569BETT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX8569BETT+T.pdf
- Description:
- IC REG BOOST 3.3V 750MA 6TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:214
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Product details
Overview
MAX8569BETT+T from Maxim Integrated is a fixed-output 3.3V, 200mA synchronous step-up DC-DC converter in a 6-pin TDFN (3mm × 3mm) package, operating from 1.5V to 5.5V input, delivering up to 95% efficiency with 7µA typical quiescent current and integrated power-on reset (RST) output - designed for battery-powered portable electronics requiring compact, low-power voltage boosting.
For engineers reviewing the MAX8569BETT+T datasheet, MAX8569BETT+T pinout, MAX8569BETT+T application, or MAX8569BETT+T equivalent, key selection considerations include its fixed 3.3V output, RST open-drain reset signaling at 90% VOUT regulation threshold, shutdown current <1µA, BATT-to-OUT pass-through during shutdown for RTC backup, and TDFN thermal performance with exposed paddle.
Technical Context
The MAX8569BETT+T uses a current-limited, oscillator-free control scheme: n-channel switch on-time terminates at 750mA peak current or 5µs maximum, followed by synchronous rectifier conduction until inductor current reaches zero. Regulation is achieved via feedback comparator monitoring RST's 90% VOUT threshold.
During shutdown, internal p-channel MOSFET connects BATT directly to OUT through the inductor, eliminating body-diode drop and enabling seamless backup power delivery to real-time clocks or SRAM without external diodes - while maintaining <1µA supply current and 0.01µA BATT shutdown leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.3% over -40°C to +85°C - ensures stable logic supply for 3.3V microcontrollers and peripherals. |
| Max Output Current | 200mA at VBATT = 2V, VOUT = 3.3V - supports moderate-power RF modules or display drivers from single-cell Li+ or dual alkaline sources. |
| Efficiency | Up to 95% at 40mA load, VBATT = 2V - minimizes thermal rise and extends battery life in space-constrained handheld devices. |
| Quiescent Current | 7µA typical - enables >1-year standby in always-on sensor nodes powered by coin cells. |
| Shutdown Current | <1µA - preserves battery charge during extended sleep modes without external disconnect circuitry. |
| RST Threshold | 90% of nominal VOUT (2.97V @ 3.3V) - provides clean, hysteresis-free power-good signaling for MCU reset sequencing. |
| Input Voltage Range | 1.5V to 5.5V - accommodates 1-cell Li+, 2-cell alkaline/NiMH, or partially discharged batteries without brownout. |
Pinout & Package
MAX8569BETT+T is housed in a thermally enhanced 6-pin TDFN package (3mm × 3mm × 0.8mm) with exposed paddle (EP) soldered to PCB ground plane for improved thermal dissipation (1454mW max power at +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SHDN | Active-low enable input | Logic-low (<0.3V) forces shutdown; internal 1.228V threshold enables low-battery cutoff when used with resistor divider. |
| 2 BATT | Battery input connection | Accepts 1.5V–5.5V source; internally connected to OUT during shutdown for backup power path. |
| 3 GND | Analog/digital ground reference | Must be tied to low-impedance PCB ground plane; EP pad must also connect to same ground for thermal and noise control. |
| 4 LX | Switch node | Connects to inductor; driven by internal n-channel MOSFET; tied to OUT during shutdown via internal p-channel device. |
| 5 OUT | Regulated output | Delivers fixed 3.3V; supplies internal bias and serves as RST pullup source; bypass with ≥10µF ceramic capacitor. |
| 6 RST | Open-drain reset output | Pulls low when VOUT < 90% of 3.3V; high-impedance otherwise - requires external 100kΩ–1MΩ pullup to OUT for active-high reset signal. |
| EP | Exposed thermal paddle | Not electrically active; must be soldered to solid ground plane to meet thermal limits and ensure 1454mW power dissipation capability. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode, reducing solution size by ~30% and improving light-load efficiency by 5–10% vs. asynchronous designs. |
| BATT-to-OUT pass-through in shutdown | Enables direct battery backup for RTC/SRAM without voltage drop - no external diode or switch required. |
| Integrated power-on reset (RST) | Provides system-level power-good indication with precise 90% VOUT threshold and <100nA leakage - simplifies reset IC elimination. |
| Ultra-low quiescent current | 7µA operation and <1µA shutdown minimize self-discharge in energy-harvesting and long-life battery applications. |
| Current-limited adaptive control | 750mA switch current limit and 5µs max on-time enable stable operation across wide input/output ratios without external compensation. |
Applications
| Medical Diagnostic Equipment | Digital Cameras |
|---|---|
|
Use Scenario: Portable ultrasound probe with embedded ADC and low-power FPGA requiring stable 3.3V rail from two AA batteries. IC Role / Device Role / Timing Role: Primary 3.3V step-up regulator with RST providing power-good signal to FPGA configuration logic. Use Value: Enables >8-hour continuous operation on alkaline cells while guaranteeing clean reset assertion before FPGA initialization. |
Use Scenario: Compact digital camera image sensor and ISP subsystem powered by single Li+ cell. IC Role / Device Role / Timing Role: Fixed 3.3V boost converter supplying sensor interface and memory I/O; RST synchronizes power-up sequence with image pipeline startup. Use Value: Eliminates need for discrete reset IC and Schottky diode, reducing BOM count and PCB area by 25%. |
| PDAs and Smartphones | Battery Backup Systems |
|
Use Scenario: Legacy PDA mainboard requiring 3.3V supply for touchscreen controller and SD card interface during battery-only operation. IC Role / Device Role / Timing Role: Secondary boost regulator supporting peripheral rails; BATT-to-OUT pass-through maintains RTC time during main PMIC shutdown. Use Value: Provides uninterrupted real-time clock function without dedicated backup battery or diode isolation circuitry. |
Use Scenario: Industrial data logger with nonvolatile SRAM and RTC that must retain state during AC power loss. IC Role / Device Role / Timing Role: Backup power manager connecting main Li+ battery to SRAM/RTC VDD during system shutdown. Use Value: Achieves zero-voltage-drop backup path with <1µA quiescent drain - extends SRAM retention beyond 5 years on single CR2032. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS610992DRVR | Fixed 3.3V output, 400mA capability, 1.2µA IQ, but no RST output and requires external diode for BATT-to-OUT pass-through. | Lacks integrated reset and true shutdown pass-through - needs additional components for RTC backup and power-good signaling. | Choose when higher output current (>200mA) is required and RST functionality is handled elsewhere. |
| SP6652ES-L/TR | Fixed 3.3V, 300mA, 25µA IQ, no RST, no BATT-to-OUT path, SOT23-6 package only. | No reset output or backup power support; higher quiescent current reduces battery life in ultra-low-power use cases. | Consider only for cost-sensitive, non-backup applications where 25µA IQ is acceptable and board space allows larger inductor. |
Compared with TPS610992DRVR and SP6652ES-L/TR, the MAX8569BETT+T uniquely integrates both RST power-good signaling and BATT-to-OUT pass-through in a thermally optimized TDFN package - making it the only option among the three that eliminates external reset ICs and backup diodes while sustaining sub-1µA shutdown current.
Availability
MAX8569BETT+T is available at Aetrix Electronics and suitable for medical diagnostic equipment, digital cameras, PDAs and smartphones, battery backup systems, and industrial data loggers requiring stable component supply with guaranteed long-term availability.
Supply support for MAX8569BETT+T 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX8569 series belongs to Maxim's ultra-low-power DC-DC converter product line, engineered specifically for space-constrained, battery-operated portable electronics needing efficient voltage boosting with integrated system-level functions like reset and backup power routing.
FAQ
What is the output voltage tolerance of the MAX8569BETT+T over temperature and load?
The MAX8569BETT+T delivers a fixed 3.3V output with ±2.3% tolerance over the full -40°C to +85°C operating range and across 1mA to 200mA load currents. This specification is verified per the Electrical Characteristics table in the datasheet, where min/max values are 3.217V and 3.373V at temperature extremes - ensuring reliable 3.3V logic compatibility for microcontrollers and sensors without external trimming.
Does the MAX8569BETT+T require an external Schottky diode?
No, the MAX8569BETT+T does not require an external Schottky diode because it integrates a synchronous rectifier. The internal p-channel and n-channel MOSFETs replace the diode function, achieving up to 95% efficiency and eliminating forward-voltage drop losses - confirmed in the Features section and Typical Operating Characteristics efficiency curves.
How does the RST pin on the MAX8569BETT+T behave during power-up and fault conditions?
The RST pin on the MAX8569BETT+T is an open-drain output that pulls low when VOUT falls below 90% of 3.3V (i.e., <2.97V), and goes high-impedance when VOUT rises above that threshold. During shutdown, RST remains high-impedance. It requires an external pullup resistor (100kΩ–1MΩ) to OUT to generate a logic-high reset signal - behavior fully documented in the Pin Description and Applications Information sections.
Can the MAX8569BETT+T be used with a single 1.5V alkaline cell?
Yes, the MAX8569BETT+T supports input voltages as low as 1.5V, enabling operation from a single alkaline cell down to end-of-life (~1.24V startup voltage with 2.6kΩ load). Its 7µA quiescent current and <1µA shutdown current maximize usable battery capacity - validated in the Startup Voltage vs. Load Resistance graph and Electrical Characteristics table.
What is the thermal performance advantage of the TDFN package used by the MAX8569BETT+T?
The MAX8569BETT+T's 6-pin TDFN package (T633-1) features an exposed thermal paddle (EP) that, when soldered to a PCB ground plane, enables 1454mW maximum continuous power dissipation at +70°C - nearly double the 727mW rating of the SOT23-6 variant. This allows higher sustained output current in compact layouts without thermal derating, as specified in the Absolute Maximum Ratings table.
MAX8569BETT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 750mA (Switch)
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TDFN (3x3)
MAX8569BETT+T FAQ
1.How can I place an order for MAX8569BETT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8569BETT+T 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 MAX8569BETT+T reliable?
The price and inventory of MAX8569BETT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8569BETT+T is usually 5 days.
3.What payment methods are accepted for MAX8569BETT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8569BETT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8569BETT+T?
MAX8569BETT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8569BETT+T 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 MAX8569BETT+T?
For technical support, including MAX8569BETT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8569BETT+T requirements.
6.How does Aetrix verify that MAX8569BETT+T is sourced from the original manufacturer or authorized distributors?
All MAX8569BETT+T 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 MAX8569BETT+T meets industry standards.
7.What is the process for return or replacement of MAX8569BETT+T?
All MAX8569BETT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8569BETT+T, 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 MAX8569BETT+T part is unused and in its original packaging.
Return procedure for MAX8569BETT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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