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Analog Devices Inc./Maxim Integrated MAX8569AETT+T
- Part No.:
- MAX8569AETT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX8569AETT+T.pdf
- Description:
- IC REG BOOST ADJ 750MA 6TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,729
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Product details
Overview
The MAX8569AETT+T from Maxim Integrated is a 6-pin TDFN-packaged, adjustable-output synchronous boost regulator delivering up to 200mA at output voltages from 2.0V to 5.5V from a 1.5V–5.5V input. It features 7µA typical quiescent current, 95% peak efficiency, and internal n/p-channel MOSFETs eliminating external diodes. It is used in battery-powered portable devices requiring low-power, compact DC-DC conversion with backup power capability.
For engineers reviewing the MAX8569AETT+T datasheet, MAX8569AETT+T pinout, MAX8569AETT+T application, or MAX8569AETT+T equivalent, key selection criteria include its adjustable feedback threshold (1.228V), shutdown current (<1µA), BATT-to-OUT pass-through during shutdown, 750mA switch current limit, and TDFN 3mm × 3mm thermal performance.
Technical Context
The MAX8569AETT+T employs a current-limited, oscillator-free control scheme: n-channel switch on-time terminates either at 750mA peak inductor current or after 5µs maximum on-time. Regulation is achieved by sensing feedback voltage at FB and comparing it to a precision 1.228V reference.
During shutdown, an internal p-channel MOSFET connects BATT directly to OUT via LX, enabling zero-drop backup supply for RTC or SRAM without external diodes. The device uses BiCMOS process technology and integrates both power switches and synchronous rectifier control logic in a single die.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5V to 5.5V - supports two alkaline/NiMH cells or single Li+ cell without external level-shifting |
| Output Current Capability | 200mA max at VOUT = 3.3V, VBATT = 2.0V - sufficient for powering microcontrollers, sensors, and RF modules |
| Quiescent Current | 7µA typical - enables >1-year battery life in always-on low-duty-cycle applications |
| Shutdown Supply Current | <1µA - preserves battery charge during extended standby or sleep modes |
| Feedback Reference Voltage | 1.228V ±25mV - sets output via resistor divider; enables precise 2.0V–5.5V adjustment |
| Switch Current Limit | 750mA peak - defines maximum inductor current and limits fault energy during short-circuit events |
| Efficiency | Up to 95% at 40mA load, VBATT = 2.0V, VOUT = 3.3V - reduces thermal load and extends runtime in space-constrained designs |
Pinout & Package
MAX8569AETT+T is housed in a thermally enhanced 6-pin TDFN package (3mm × 3mm × 0.8mm) with exposed paddle (EP) for PCB ground connection. The EP improves thermal dissipation and must be soldered to a solid ground plane per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Logic-controlled shutdown input | Active-low enable; 1.228V threshold allows use as low-battery detector; pulls IC into sub-1µA state |
| 2 - BATT | Main battery input | Connects to 1.5V–5.5V source; internally routed to OUT during shutdown for backup power path |
| 3 - GND | Analog/digital ground reference | Common return for all internal circuits; must be tied to low-impedance PCB ground plane |
| 4 - LX | Switch node | Connects to inductor; carries high-frequency switching current; tied to OUT during shutdown |
| 5 - OUT | Regulated output | Delivers up to 200mA; serves as bootstrap supply for internal gate drivers; bypassed with ≥10µF ceramic cap |
| 6 - FB | Feedback input | Senses resistor-divider output; regulates VOUT by holding VFB = 1.228V; high-impedance (4nA bias) |
| EP - Exposed Paddle | Thermal and electrical ground | Not electrically functional but critical for thermal management; must be soldered to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous rectification | Eliminates external Schottky diode, reducing BOM count, board area, and forward-voltage loss |
| BATT-to-OUT pass-through in shutdown | Enables seamless backup power for RTC/SRAM without added diodes or circuitry |
| Ultra-low 7µA quiescent current | Minimizes no-load battery drain-critical for long-life coin-cell or primary-battery applications |
| Adjustable output (2.0V–5.5V) | Single part supports multiple rail requirements via external resistor divider; avoids variant proliferation |
| 750mA peak switch current limit | Provides robust overcurrent protection while maintaining high efficiency across wide load range |
Applications
| Medical Diagnostic Equipment | Digital Cameras |
|---|---|
Use Scenario: Portable handheld ultrasound or glucose meter requiring stable 3.3V rail from two AA cells with multi-year battery life. IC Role / Device Role / Timing Role: Primary step-up converter supplying regulated 3.3V to MCU, display driver, and analog front-end. Use Value: 7µA quiescent current and BATT-to-OUT pass-through extend battery life and support RTC backup without secondary battery. |
Use Scenario: Compact digital camera using single Li+ cell (3.0–4.2V) to generate 5.0V flash LED driver supply and 3.3V sensor/MCU rail. IC Role / Device Role / Timing Role: Adjustable boost converter generating 5.0V from declining battery voltage; enables consistent flash brightness across discharge cycle. Use Value: 95% peak efficiency and 200mA output sustain flash charging while minimizing heat in sealed enclosure. |
| PDA and Smartphone Peripherals | PC Card (PCMCIA) Power Management |
Use Scenario: Bluetooth headset accessory powered by CR2032 coin cell needing 3.3V for radio and audio codec. IC Role / Device Role / Timing Role: Low-IQ boost regulator enabling >6-month operation; shutdown mode activated by host controller. Use Value: Sub-1µA shutdown current prevents battery depletion during storage; small TDFN footprint fits tight mechanical envelope. |
Use Scenario: PCMCIA modem card drawing burst current from 3.3V bus while operating from 5V host slot; requires local 3.3V regulation. IC Role / Device Role / Timing Role: Local point-of-load boost converter providing clean, isolated 3.3V rail independent of noisy host bus. Use Value: Internal synchronous rectifier and 10µH inductor compatibility reduce EMI and simplify filtering versus diode-based solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS610992DRCR | Fixed 3.3V output; 1.2µA IQ; 300mA output; 1.8V min input | Lacks adjustable output and BATT-to-OUT pass-through; better for ultra-low-IQ fixed-rail apps | Select when lowest possible quiescent current is prioritized over backup power or voltage flexibility |
| SP6652ES-L/TR | Adjustable output; 25µA IQ; 300mA output; SOT23-6 only; no shutdown pass-through | Higher IQ, no backup path, larger package; lacks RST or low-battery detection integration | Select when higher output current is needed and TDFN thermal performance is not required |
Compared with MAX8569AETT+T, the TPS610992DRCR offers lower quiescent current but sacrifices adjustable output and battery-backup functionality; the SP6652ES-L/TR provides higher output current but increases board area and eliminates critical shutdown pass-through capability.
Availability
MAX8569AETT+T is available at Aetrix Electronics and suitable for medical diagnostics, portable imaging, wearable electronics, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX8569AETT+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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX8569A series belongs to Maxim's ultra-low-power boost converter product line, engineered specifically for battery-operated portable equipment where minimal quiescent current, small footprint, and integrated backup power are essential design requirements.
FAQ
What is the feedback reference voltage of the MAX8569AETT+T, and how does it affect output setting?
The MAX8569AETT+T has a precision 1.228V feedback reference voltage (VFB) with ±25mV tolerance over temperature. This value determines the output voltage via the external resistor divider: VOUT = VFB × (1 + R3/R4). Using this relationship, designers can set outputs from 2.0V to 5.5V while maintaining regulation accuracy. The MAX8569AETT+T's low 4nA FB bias current minimizes divider error, supporting high-resistor values to reduce quiescent drain.
Does the MAX8569AETT+T support battery backup during shutdown, and how is it implemented?
Yes, the MAX8569AETT+T supports battery backup during shutdown via an internal p-channel MOSFET that connects BATT directly to OUT through the inductor and LX pin. When SHDN is pulled low, the converter disables switching but maintains a low-resistance path (<0.9Ω p-channel RDS(ON)) between battery and output. This enables the input battery to power real-time clocks, SRAM, or microcontrollers without diode voltage drop-making the MAX8569AETT+T ideal for always-on backup functions.
What is the maximum achievable output current for the MAX8569AETT+T under typical conditions?
The MAX8569AETT+T delivers up to 200mA continuous output current when VBATT = 2.0V and VOUT = 3.3V, as specified in the Electrical Characteristics table. Output current capability scales with input voltage: at VBATT = 2.5V, it supports ~250mA; at VBATT = 3.0V, ~300mA. Performance depends on inductor selection, PCB layout, and thermal management-the TDFN package's exposed paddle helps sustain full output in ambient temperatures up to +85°C.
How does the MAX8569AETT+T achieve high efficiency without an external Schottky diode?
The MAX8569AETT+T achieves >90% efficiency by integrating a synchronous rectifier-comprising complementary n-channel and p-channel MOSFETs-that replaces the lossy external Schottky diode. During the off-phase, the low-RDS(ON) p-channel device (0.3Ω typ) conducts instead of the body diode, eliminating forward-voltage drop (~0.3V) and associated conduction losses. This architecture reduces heat generation, shrinks solution size, and improves light-load efficiency-key advantages reflected in the MAX8569AETT+T's 95% peak efficiency spec.
What are the thermal limitations and PCB layout requirements for reliable operation of the MAX8569AETT+T?
The MAX8569AETT+T uses a 6-pin TDFN package with exposed paddle (EP), rated for 1454mW continuous power dissipation at +70°C (derating 18.2mW/°C above). Reliable thermal performance requires soldering the EP directly to a minimum 100mm² copper ground plane. Layout best practices include placing input/output capacitors within 5mm of GND pin, routing FB and LX traces as short as possible, and avoiding splits under the EP. These measures prevent ground bounce, minimize ripple, and ensure the MAX8569AETT+T sustains 200mA output without thermal shutdown.
MAX8569AETT+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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- 5.5V
- 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)
MAX8569AETT+T FAQ
1.How can I place an order for MAX8569AETT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8569AETT+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 MAX8569AETT+T reliable?
The price and inventory of MAX8569AETT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8569AETT+T is usually 5 days.
3.What payment methods are accepted for MAX8569AETT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8569AETT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8569AETT+T?
MAX8569AETT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8569AETT+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 MAX8569AETT+T?
For technical support, including MAX8569AETT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8569AETT+T requirements.
6.How does Aetrix verify that MAX8569AETT+T is sourced from the original manufacturer or authorized distributors?
All MAX8569AETT+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 MAX8569AETT+T meets industry standards.
7.What is the process for return or replacement of MAX8569AETT+T?
All MAX8569AETT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8569AETT+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 MAX8569AETT+T part is unused and in its original packaging.
Return procedure for MAX8569AETT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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