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Analog Devices Inc./Maxim Integrated MAX8562ETA
- Part No.:
- MAX8562ETA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX8562ETA.pdf
- Description:
- IC REG BUCK ADJ 500MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,278
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Product details
Overview
MAX8562ETA from Maxim Integrated is a synchronous step-down DC-DC converter optimized for space-constrained, high-efficiency applications requiring up to 500mA output current, 4MHz switching frequency, and adjustable 0.6V–2.5V output voltage. It drives an external bypass P-channel MOSFET via its ODO/ODI interface and operates from a 2.7V–5.5V input, targeting CDMA RF power amplifier supply rails.
For engineers reviewing the MAX8562ETA datasheet, MAX8562ETA pinout, MAX8562ETA application, or MAX8562ETA equivalent, key selection criteria include its 8-pin TDFN package, open-drain output control logic, ±1.5% FB threshold accuracy, internal synchronous rectification, and thermal shutdown protection at +160°C.
Technical Context
The MAX8562ETA implements a proprietary hysteretic-PWM control scheme with fixed-frequency operation up to 4MHz and minimum on/off times of 107ns/95ns. Its voltage-positioning feedback architecture samples the LX node to eliminate phase lag, enabling stable regulation with small ceramic output capacitors and halving peak-to-peak output-voltage excursions during load transients.
It integrates a P-channel high-side switch (RONP = 0.8–1.5Ω) and N-channel synchronous rectifier (RONN = 0.4–0.82Ω), supports logic-controlled shutdown (0.1µA quiescent), and features dedicated ODI/ODO pins to force 100% duty cycle or high-impedance states for external PFET control in dual-mode PA supplies.
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 external regulators |
| Output Current | Guaranteed 500mA - sufficient for RF power amplifier bias rails in CDMA handsets |
| Switching Frequency | Up to 4MHz - enables use of sub-2.2µH inductors and reduces footprint vs. 1MHz converters |
| Quiescent Current | 40µA (typ) - extends battery life in standby mode for portable devices |
| FB Threshold Voltage | 0.6V ±1.5% - sets precise output voltage via external resistor divider (R1/R2) |
| Shutdown Current | 0.1µA - minimizes leakage in system-level power gating schemes |
| Thermal Shutdown | +160°C with 20°C hysteresis - protects against sustained overload in sealed enclosures |
Pinout & Package
MAX8562ETA is housed in an 8-pin, 3mm × 3mm × 0.8mm Thin DFN package with exposed thermal pad (EP) connected to GND. The package supports high-power density layouts and efficient heat dissipation in compact handheld designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Voltage feedback input | Regulates output by comparing divided LX–GND voltage to 0.6V reference; enables voltage positioning |
| 2 ODO | Open-drain output | Drives external PFET gate; pulled up to IN via internal 10kΩ resistor when ODI = low |
| 3 SHDN | Active-low shutdown control | Puts IC into 0.1µA sleep mode; requires logic-high or IN tie for normal operation |
| 4 GND | Analog ground reference | Reference for FB, SHDN, and ODI; must be separated from PGND in layout |
| 5 PGND | Power ground return | Low-impedance return path for LX switching current; connects to exposed pad |
| 6 LX | Switch node | Connects to inductor; carries high di/dt current; requires short, wide trace routing |
| 7 IN | Input supply rail | 2.7V–5.5V input; bypassed with 2.2µF ceramic capacitor near pin |
| 8 ODI | Digital input for ODO control | Logic-high forces ODO low (100% duty cycle); logic-low places ODO in high-Z or 10kΩ pullup state |
Key Features
| Feature | Design Value |
|---|---|
| Internal synchronous rectification | Eliminates external Schottky diode, improving efficiency by >5% at 500mA and reducing BOM count |
| Voltage-positioning feedback | Uses LX node sampling to shift output voltage linearly with load current, cutting transient overshoot by 50% |
| Adjustable soft-start | Internally limits inrush current during startup, relaxing input capacitor sizing requirements for high-impedance sources |
| Logic-controlled bypass FET drive | ODI/ODO interface enables seamless transition between buck-regulated and direct-battery modes in CDMA PA stages |
| High-frequency PWM control | 4MHz max switching allows 1µH inductors, shrinking total solution size by >40% vs. 1MHz alternatives |
Applications
| CDMA RF Power Amplifier Supply | Microprocessor Core Rail |
|---|---|
Use Scenario: Provides dynamically switched VCC to CDMA PA modules requiring both regulated low-noise bias and direct-battery high-power mode. IC Role / Device Role / Timing Role: Buck controller with external PFET gate driver; ODI toggles between 1.2V regulation and VIN pass-through. Use Value: Enables dual-mode PA operation with <20µs mode-switching time and no external level-shifting circuitry. | Use Scenario: Powers DSP or ARM core in portable media players where tight voltage tolerance and fast load transient response are critical. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 1.2V @ 500mA with ±1.5% initial accuracy and voltage-positioning load regulation. Use Value: Reduces output voltage deviation under 500mA load steps to <25mV peak-to-peak, eliminating need for large bulk capacitance. |
| Smartphone Baseband SoC Supply | Portable Audio Codec Bias Rail |
Use Scenario: Supplies clean, low-noise 1.5V to baseband processors in multi-band smartphones operating across varying battery voltages. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with 40µA quiescent current and 2.7V–5.5V input range. Use Value: Maintains >85% efficiency at 10mA light load and >92% at 300mA, extending talk time without compromising noise performance. | Use Scenario: Generates stable 1.8V bias for stereo audio codecs in MP3 players and PDAs with strict EMI limits. IC Role / Device Role / Timing Role: Fixed-frequency 4MHz buck regulator using ceramic output caps to minimize conducted emissions. Use Value: Achieves <10mVpp output ripple at 4MHz with 2.2µF X5R capacitor, meeting audio SNR requirements without LC filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 3MHz max switching, 300mA output, 2.05V–6.0V input, no ODO/ODI interface | Lacks external bypass FET control; suited for fixed-output, lower-current rails only | Select when ODO/ODI functionality is unnecessary and input voltage exceeds 5.5V |
| RT8059NGSP | 2.5MHz max switching, 600mA output, 2.5V–5.5V input, integrated soft-start but no voltage positioning | Higher current capability but slower transient response due to conventional feedback topology | Prefer for higher-load applications where output voltage stability under rapid load changes is less critical |
Compared with TPS62231DRYR and RT8059NGSP, the MAX8562ETA uniquely combines 4MHz operation, 500mA capability, and dedicated ODI/ODO logic for external PFET control-making it the only option among the three qualified for CDMA PA two-step VCC architectures requiring sub-20µs mode switching.
Availability
MAX8562ETA is available at Aetrix Electronics and suitable for CDMA RF power amplifier supplies, microprocessor core rails, and portable audio codec bias rails requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX8562ETA 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, communications, and consumer applications.
The MAX8560/MAX8561/MAX8562 series was designed specifically for ultra-compact, high-efficiency DC-DC conversion in battery-powered handheld devices-emphasizing minimal external component count, fast transient response, and flexible output control via logic interfaces.
FAQ
What is the function of the ODI and ODO pins on the MAX8562ETA?
The ODI (pin 8) and ODO (pin 2) pins on the MAX8562ETA enable external control of a bypass P-channel MOSFET. When ODI is logic-high, ODO is actively pulled low to force the MAX8562ETA into 100% duty cycle, passing VIN directly to the output. When ODI is logic-low, ODO enters high-impedance state with an internal 10kΩ pullup to IN. This dual-mode behavior makes the MAX8562ETA ideal for CDMA PA supply architectures requiring both regulated and direct-battery operation.
Does the MAX8562ETA require an external Schottky diode?
No, the MAX8562ETA does not require an external Schottky diode. It integrates internal synchronous rectification using complementary P-channel and N-channel MOSFETs. This eliminates conduction losses associated with external diodes, improves full-load efficiency by up to 7%, and reduces thermal stress on the PCB-key advantages confirmed in the MAX8562ETA's typical operating characteristics graphs.
What is the recommended inductor value for the MAX8562ETA in a 1.2V/500mA application?
For a 1.2V/500mA application, the MAX8562ETA datasheet recommends a 1.0µH to 2.2µH inductor. A 1.5µH inductor (e.g., Murata LQH32CN1R5M53) balances size, efficiency, and transient response. Inductors with DC resistance between 50mΩ and 150mΩ optimize voltage-positioning performance, while values below 100mΩ improve heavy-load efficiency above 200mA. The MAX8562ETA's 4MHz capability allows physically smaller inductors than lower-frequency alternatives.
How does the MAX8562ETA achieve fast load transient response?
The MAX8562ETA achieves fast load transient response through its voltage-positioning feedback architecture, which samples the LX switch node instead of the output. This removes phase lag from the output capacitor, stabilizing the control loop and allowing use of small ceramic capacitors. Combined with a proprietary hysteretic-PWM scheme and minimum on/off times of 107ns/95ns, the MAX8562ETA delivers <25mV peak-to-peak output deviation during 500mA load steps-halving overshoot versus conventional buck converters.
What is the maximum allowable input voltage for the MAX8562ETA?
The absolute maximum input voltage for the MAX8562ETA is +6V on the IN, FB, SHDN, ODI, and ODO pins relative to GND. However, the specified operational input voltage range is 2.7V to 5.5V. Exceeding 5.5V may cause permanent damage or violate functional specifications-even briefly-so designs must ensure input sources (e.g., Li+ batteries with charging spikes) remain within this 2.7V–5.5V window during all operating conditions.
MAX8562ETA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 2.5V
- Current - Output:
- 500mA
- Frequency - Switching:
- Up ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN-EP (3x3)
MAX8562ETA FAQ
1.How can I place an order for MAX8562ETA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8562ETA 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 MAX8562ETA reliable?
The price and inventory of MAX8562ETA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8562ETA is usually 5 days.
3.What payment methods are accepted for MAX8562ETA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8562ETA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8562ETA?
MAX8562ETA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8562ETA 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 MAX8562ETA?
For technical support, including MAX8562ETA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8562ETA requirements.
6.How does Aetrix verify that MAX8562ETA is sourced from the original manufacturer or authorized distributors?
All MAX8562ETA 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 MAX8562ETA meets industry standards.
7.What is the process for return or replacement of MAX8562ETA?
All MAX8562ETA units undergo pre-shipment inspection (PSI). If there is an issue with MAX8562ETA, 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 MAX8562ETA part is unused and in its original packaging.
Return procedure for MAX8562ETA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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