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Analog Devices Inc./Maxim Integrated MAX8561ETA-G104
- Part No.:
- MAX8561ETA-G104
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX8561ETA-G104.pdf
- Description:
- 4MHZ, 500MA, SYNCHRONOUS STEP-DO
- Quantity:
- Payment:
- Shipping:
Inventory:1,547
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Product details
Overview
The MAX8561ETA-G104 from Maxim Integrated is a 4MHz, 500mA synchronous step-down DC-DC converter in an 8-pin 3mm × 3mm Thin DFN package, featuring logic-controlled output voltage, 0.6V to 2.5V adjustable regulation, ±1.5% initial accuracy, and internal synchronous rectification. It delivers stable core power for microprocessor/DSP supplies in space-constrained portable devices.
For engineers reviewing the MAX8561ETA-G104 datasheet, MAX8561ETA-G104 pinout, MAX8561ETA-G104 application, or MAX8561ETA-G104 equivalent, key selection criteria include guaranteed 500mA output current at 2.7V–5.5V input, 40µA typical quiescent current, logic-controlled VOUT switching, thermal shutdown protection, and compatibility with low-ESR ceramic capacitors and sub-2.2µH inductors.
Technical Context
This device implements a proprietary hysteretic-PWM control scheme that maintains fixed-frequency operation up to 4MHz while enabling trade-offs between efficiency and external component size. The architecture integrates a P-channel high-side switch and N-channel synchronous rectifier, eliminating the need for an external Schottky diode.
Voltage-positioning load regulation is achieved via LX-node feedback, removing phase lag from the output capacitor and enabling stable loop response with small ceramic COUT (e.g., 2.2µF). Soft-start circuitry eliminates inrush current, and SHDN supports 0.1µA shutdown current with high-impedance LX during disable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li+ and alkaline battery inputs without pre-regulation |
| Output Current | 500mA guaranteed - sufficient for DSP/microprocessor core rails in handheld devices |
| Switching Frequency | Up to 4MHz - enables use of 1µH inductors ≤3.2mm × 2.5mm footprint |
| Quiescent Current | 40µA typical - extends battery life in always-on or low-duty-cycle modes |
| Output Voltage Accuracy | ±1.5% initial - ensures tight regulation for sensitive digital core supplies |
| FB Threshold Voltage | 0.6V nominal - sets minimum output at 0.6V with standard resistor-divider scaling |
| Shutdown Current | 0.1µA - reduces system standby power to negligible levels |
Pinout & Package
MAX8561ETA-G104 is housed in an 8-pin, 3mm × 3mm × 0.8mm Thin DFN package with exposed thermal pad (EP), optimized for high-density PCB layouts and thermal performance in portable applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Power input | Accepts 2.7V–5.5V supply; requires local 2.2µF ceramic bypass to PGND |
| 2 (GND) | Analog ground reference | Signal return for FB, SHDN, ODI; must be routed separately from PGND |
| 3 (SHDN) | Active-low enable | Pull low to enter 0.1µA shutdown; pull high or tie to IN for normal operation |
| 4 (FB) | Voltage feedback input | Regulates to 0.6V; connects to center of resistive divider between LX and GND |
| 5 (PGND) | Power ground | High-current return for LX switch and synchronous rectifier; connects to EP |
| 6 (LX) | Switch node | Connects to inductor; drives internal PFET/NFET pair; high dv/dt node requiring short trace |
| 7 (ODI) | Digital control input | Logic-selects ODO state: high forces ODO low (MAX8561) or 100% duty cycle (MAX8562) |
| 8 (ODO) | Open-drain output | Configurable auxiliary output: toggles regulated voltages (MAX8561) or drives external PFET (MAX8562) |
| EP | Exposed thermal pad | Must be soldered to solid GND plane for thermal dissipation and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Hysteretic-PWM control | Enables fixed 4MHz switching with fast transient response and no external compensation required |
| Internal synchronous rectification | Eliminates external Schottky diode, improving efficiency by ~8–12% at 500mA vs. asynchronous designs |
| Voltage-positioning load regulation | Reduces peak-to-peak output voltage excursions by 50% during load transients vs. conventional buck converters |
| Logic-controlled output voltage | Allows dynamic VOUT switching (e.g., 1.0V/1.5V) using ODI/ODO without external MOSFETs or level shifters |
| Integrated soft-start | Prevents input inrush current, enabling direct connection to high-impedance sources like coin cells |
Applications
| Microprocessor Core Supply | CDMA RF Power Amplifier |
|---|---|
Use Scenario: Powers ARM9 or similar low-voltage DSP cores in smartphones with dynamic voltage scaling requirements. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated 1.0V–1.5V at up to 500mA with fast load-transient response. Use Value: Voltage-positioning feedback minimizes overshoot during CPU burst loads, reducing need for oversized output capacitance. | Use Scenario: Supplies CDMA PA bias in dual-mode handsets requiring LP mode (regulated 1.2V) and HP mode (bypassed to battery). IC Role / Device Role / Timing Role: Controls external PFET via ODO/ODI to switch between buck-regulated and direct-battery paths. Use Value: Enables seamless transition between power modes without sequencing delays or external logic. |
| PDA System-on-Chip Rail | MP3 Player Audio Codec Supply |
Use Scenario: Generates clean 1.2V core voltage for SoC in portable media players with strict EMI limits. IC Role / Device Role / Timing Role: High-frequency (4MHz) step-down converter minimizing inductor size and board area. Use Value: 4MHz operation allows 1µH inductor (3.2mm × 2.5mm), reducing solution footprint by >40% vs. 1MHz alternatives. | Use Scenario: Provides low-noise 1.8V supply to stereo audio DAC/ADC in battery-powered MP3 players. IC Role / Device Role / Timing Role: Low-quiescent-current (40µA typ) buck regulator maintaining efficiency across 10µA–500mA load range. Use Value: Pulse-skipping mode at light loads preserves battery runtime during playback pause or standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 3MHz max frequency, 300mA output, 2.05V–6.0V input, 0.6V FB threshold | Limited to lower current; lacks logic-controlled VOUT and ODO/ODI functionality | Choose when 300mA suffices and dual-voltage switching is unnecessary |
| RT8059NGQW | 2.5MHz max frequency, 600mA output, 2.5V–5.5V input, no ODI/ODO pins | Higher current but no auxiliary open-drain control; requires external FET for bypass mode | Prefer when higher output current is critical and auxiliary logic control is not needed |
Compared with TPS62231DRYR and RT8059NGQW, the MAX8561ETA-G104 uniquely combines 500mA capability, 4MHz switching, and integrated ODI/ODO logic control-enabling compact dual-rail or bypass-FET architectures without adding discrete components or layout complexity.
Availability
MAX8561ETA-G104 is available at Aetrix Electronics and suitable for microprocessor core supplies, CDMA RF power amplifier biasing, and portable media player SoC rail generation requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.
Supply support for MAX8561ETA-G104 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 MAX8560/MAX8561/MAX8562 series was designed specifically for ultra-compact, high-efficiency DC-DC conversion in battery-powered portable electronics where board space, thermal constraints, and light-load efficiency are critical.
FAQ
What is the maximum supported switching frequency for the MAX8561ETA-G104?
The MAX8561ETA-G104 supports a maximum switching frequency of 4MHz. This high-frequency capability allows designers to use smaller inductors (e.g., 1µH) and ceramic capacitors, significantly reducing solution footprint. Frequency remains stable across load and input voltage variations due to its proprietary hysteretic-PWM control architecture, as confirmed in the Typical Operating Characteristics section of the datasheet.
Does the MAX8561ETA-G104 require an external Schottky diode?
No, the MAX8561ETA-G104 does not require an external Schottky diode. It integrates both a P-channel high-side switch and an N-channel synchronous rectifier, enabling full synchronous rectification. This internal architecture improves conversion efficiency by 8–12% compared to asynchronous buck converters and eliminates the need for external diode placement, routing, and thermal management.
How is output voltage set on the MAX8561ETA-G104?
Output voltage on the MAX8561ETA-G104 is set using a resistive divider between LX and GND, with the FB pin connected to the midpoint. The internal FB threshold is 0.6V, so VOUT = 0.6V × (1 + R1/R2). For example, selecting R2 = 100kΩ and R1 = 100kΩ yields 1.2V output. This LX-referenced feedback enables voltage-positioning load regulation and stable loop response with minimal output capacitance.
What is the purpose of the ODI and ODO pins on the MAX8561ETA-G104?
The ODI (digital input) and ODO (open-drain output) pins on the MAX8561ETA-G104 enable logic-controlled output behavior. On the MAX8561ETA-G104, ODI toggles ODO between high-impedance and pulled-low states, allowing dynamic switching between two regulated output voltages (e.g., 1.0V and 1.5V) without external components. This functionality is documented in Figure 2 of the datasheet and is exclusive to the 8-pin TDFN variants.
What thermal considerations apply to the MAX8561ETA-G104 package?
The MAX8561ETA-G104 uses an 8-pin 3mm × 3mm Thin DFN package with an exposed thermal pad (EP). For reliable operation, the EP must be soldered to a solid copper GND plane to dissipate heat and reduce junction temperature. The package's thermal resistance θJA is rated at 24.4°C/W above +70°C, supporting continuous 1951mW power dissipation at TA = +70°C. Layout guidelines emphasize separate GND and PGND connections and short, wide traces for LX and power paths.
MAX8561ETA-G104 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX8561ETA-G104 FAQ
1.How can I place an order for MAX8561ETA-G104 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8561ETA-G104 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 MAX8561ETA-G104 reliable?
The price and inventory of MAX8561ETA-G104 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8561ETA-G104 is usually 5 days.
3.What payment methods are accepted for MAX8561ETA-G104?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8561ETA-G104 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8561ETA-G104?
MAX8561ETA-G104 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8561ETA-G104 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 MAX8561ETA-G104?
For technical support, including MAX8561ETA-G104 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8561ETA-G104 requirements.
6.How does Aetrix verify that MAX8561ETA-G104 is sourced from the original manufacturer or authorized distributors?
All MAX8561ETA-G104 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 MAX8561ETA-G104 meets industry standards.
7.What is the process for return or replacement of MAX8561ETA-G104?
All MAX8561ETA-G104 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8561ETA-G104, 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 MAX8561ETA-G104 part is unused and in its original packaging.
Return procedure for MAX8561ETA-G104:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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