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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:1,117
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Product details
Overview
MAX8562ETA+ from Maxim Integrated is a 4MHz, 500mA synchronous step-down DC-DC converter in an 8-pin 3mm × 3mm × 0.8mm Thin DFN package, featuring internal synchronous rectification, 0.6V–2.5V adjustable output voltage, ±1.5% initial FB accuracy, and logic-controlled external bypass FET drive (ODO/ODI pins). It delivers high efficiency in space-constrained CDMA power amplifier supplies and microprocessor core rails.
For engineers reviewing the MAX8562ETA+ datasheet, MAX8562ETA+ pinout, MAX8562ETA+ application, or MAX8562ETA+ equivalent, key selection criteria include its 4MHz switching frequency for ultra-small LC filters, 40µA typical quiescent current in light-load pulse-skipping mode, thermal shutdown at +160°C, and dedicated ODO open-drain output with 10kΩ internal pullup to IN for external PFET control.
Technical Context
The MAX8562ETA+ employs a proprietary hysteretic-PWM control scheme that maintains fixed-frequency operation up to 4MHz while enabling fast transient response and stable voltage positioning. Its feedback loop samples from the LX node via R1, eliminating phase lag from COUT and allowing use of only 2.2µF ceramic output capacitance.
It integrates a P-channel high-side switch (RONP = 0.8–1.5Ω) and N-channel synchronous rectifier (RONN = 0.4–0.82Ω), with current-limit thresholds of 600–1500mA (PFET) and 490–900mA (NFET). The ODI digital input controls ODO's state: high forces 100% duty cycle; low enables high-impedance mode with 10kΩ pullup to IN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | Up to 4MHz - enables use of 1µH inductors and sub-3mm² total solution size. |
| Output Current | Guaranteed 500mA - supports microprocessor cores and RF power amplifiers without derating. |
| Quiescent Current | 40µA (typ) - extends battery life in standby mode of portable devices. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li+, alkaline, and regulated 3.3V/5V rails. |
| FB Threshold Voltage | 0.6V ±1.5% - sets precise output regulation point for 0.6V–2.5V adjustable range. |
| Shutdown Current | 0.1µA - minimizes system leakage during deep sleep or power-off states. |
| Thermal Shutdown | +160°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
MAX8562ETA+ uses an 8-pin 3mm × 3mm × 0.8mm Thin DFN package with exposed pad (EP) connected to GND for thermal performance. Pin 1 is marked by index area; pin count and layout conform to JEDEC MO-229 WEEC variant T833-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Voltage feedback input | Regulates output to 0.6V; connects to center of resistive divider between LX and GND for voltage-positioning load regulation. |
| 2 ODO | Open-drain output | Drives external PFET gate; internally pulled up to IN via 10kΩ resistor when ODI = low. |
| 3 SHDN | Active-low shutdown control | Pulls low to reduce supply current to 0.1µA; high or tied to IN enables normal operation. |
| 4 GND | Analog ground reference | Reference for FB, SHDN, and ODI; must be routed separately from PGND to minimize noise coupling. |
| 5 PGND | Power ground return | Low-impedance return path for LX-switching current; connects directly to exposed pad for thermal conduction. |
| 6 LX | Switch node | Connects to inductor; carries high di/dt switching current; requires short, wide trace routing. |
| 7 IN | Input supply rail | 2.7V–5.5V input; bypassed with 2.2µF ceramic capacitor placed adjacent to IN and PGND pins. |
| 8 ODI | Digital input for ODO control | High → forces ODO low (100% duty cycle); low → enables ODO high-impedance with 10kΩ pullup to IN. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-positioning load regulation | Uses LX-sampled feedback to shift output voltage linearly with load current (IRDS drop), halving peak-to-peak transient excursions vs. conventional buck converters. |
| Internal synchronous rectification | Eliminates external Schottky diode; achieves >90% efficiency at 500mA with 1µH inductor and 2.2µF COUT. |
| Logic-controlled external bypass FET drive | ODI/ODO interface enables seamless transition between buck-regulated and direct-battery modes in CDMA PA applications. |
| Programmable soft-start | Internal circuit eliminates inrush current, reducing required input capacitance and stress on Li+ battery sources. |
| Hysteretic-PWM hybrid control | Combines fixed-frequency PWM stability with hysteretic responsiveness for <2µs load-transient recovery time. |
Applications
| CDMA Power Amplifier Supply | Microprocessor Core Rail |
|---|---|
Use Scenario: Dual-mode CDMA handset requiring high-efficiency low-noise VCC for RF power amplifier during transmit bursts and ultra-low-quiescent operation during idle. IC Role / Device Role / Timing Role: MAX8562ETA+ regulates 1.2V core supply and drives external PFET to bypass to battery voltage (VIN) during high-power transmit mode. Use Value: Enables 100% duty-cycle bypass via ODI/ODO control, reducing conduction loss and heat generation during peak PA load. |
Use Scenario: Low-voltage DSP or ARM core demanding tight output regulation, fast load transient response, and minimal board area in handheld medical or industrial controllers. IC Role / Device Role / Timing Role: MAX8562ETA+ delivers 500mA at 0.9V–1.5V with voltage-positioning feedback to suppress overshoot during core clock frequency scaling. Use Value: Achieves <50mV peak-to-peak output deviation under 20mA→500mA load steps, eliminating need for large bulk capacitors. |
| Smartphone Baseband Processor | Portable Audio Codec Supply |
Use Scenario: Baseband SoC in LTE/5G smartphones requiring dynamically scalable core voltage and low EMI in dense RF-sensitive layouts. IC Role / Device Role / Timing Role: MAX8562ETA+ operates at 4MHz to push switching harmonics beyond sensitive RF bands while maintaining 40µA quiescent current in sleep states. Use Value: Reduces required inductor size to 1µH and allows placement near SoC without shielding, cutting BOM cost and footprint. |
Use Scenario: High-fidelity portable audio player needing clean, low-noise analog supply for DAC and headphone amplifier stages. IC Role / Device Role / Timing Role: MAX8562ETA+ powers codec AVDD rail with 2.2µF X5R ceramic output cap and feed-forward capacitor (CFF) optimized for <10mV ripple at 20kHz. Use Value: Delivers <15µV RMS output noise due to synchronous rectification and LX-sampled feedback, preserving SNR in 24-bit audio paths. |
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 frequency, 300mA output, no ODO/ODI interface, 2.05V–6.0V input range | Lacks external bypass FET control; suited for fixed-output, lower-current applications only | Select when ODO/ODI functionality is unnecessary and input voltage exceeds 5.5V. |
| RT8059NGSP | 2.5MHz max frequency, 600mA output, no voltage-positioning feedback, 2.5V–5.5V input | Higher current but slower transient response; requires larger output capacitance for same stability | Choose for higher output current where 4MHz switching and LX-sampled feedback are not critical. |
Compared with TPS62231DRYR and RT8059NGSP, the MAX8562ETA+ uniquely combines 4MHz operation, ODO/ODI-controlled external PFET drive, and voltage-positioning feedback-enabling smaller magnetics, dual-mode power delivery, and superior transient suppression in space- and noise-constrained RF systems.
Availability
MAX8562ETA+ is available at Aetrix Electronics and suitable for CDMA power amplifier supplies, microprocessor core rails, smartphone baseband processors, and portable audio codec supplies requiring stable component supply across industrial temperature ranges.
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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX856x family was engineered specifically for ultra-compact, high-efficiency DC-DC conversion in battery-powered RF and portable computing systems-prioritizing small size, low quiescent current, and fast transient response over generic power delivery.
FAQ
What is the function of the ODO and ODI pins on the MAX8562ETA+?
The ODO pin is an open-drain output with a 10kΩ internal pullup to IN; the ODI pin is a digital control input. When ODI is driven high, ODO is pulled low to force the MAX8562ETA+ into 100% duty cycle-bypassing the regulator and connecting VIN directly to the output through an external PFET. When ODI is low, ODO floats high-impedance, enabling normal buck regulation. This dual-mode capability is essential for CDMA PA power sequencing.
Does the MAX8562ETA+ require an external Schottky diode?
No, the MAX8562ETA+ does not require an external Schottky diode because it integrates both a P-channel high-side switch and an N-channel synchronous rectifier. This internal synchronous rectification improves efficiency-especially at medium to high loads-and eliminates the forward voltage drop and thermal losses associated with discrete diodes. The MAX8562ETA+ achieves >90% efficiency at 500mA with a 1µH inductor and 2.2µF output capacitor.
What is the purpose of voltage-positioning feedback in the MAX8562ETA+?
Voltage-positioning feedback in the MAX8562ETA+ uses the LX node (switch node) as the feedback reference instead of the output rail, creating a controlled output voltage droop proportional to load current (VOUT = VREF − ILOAD × RDCR). This intentional droop counteracts load-induced overshoot during rapid current transients, reducing peak-to-peak output excursions by approximately 50% compared to standard buck regulators-critical for stable microprocessor core supplies.
Can the MAX8562ETA+ operate with input voltages below 2.7V?
No, the MAX8562ETA+ has a specified minimum input voltage of 2.7V per its absolute maximum and operating conditions. Below this threshold, the device may fail to start or regulate properly due to UVLO activation (UVLO threshold is 2.4V–2.6V with 60mV hysteresis). For sub-2.7V operation, alternative regulators such as the MAX8640Y (1.8V–5.5V input) should be evaluated-but note that the MAX8562ETA+ is not characterized or guaranteed for reliable operation below 2.7V.
What is the recommended inductor value for the MAX8562ETA+ in a 1.2V/500mA application?
For a 1.2V/500mA application, the recommended inductor value for the MAX8562ETA+ is 1µH-optimized for 4MHz operation, minimal footprint, and balanced efficiency across load range. Inductors with DC resistance between 50mΩ and 150mΩ (e.g., Murata LQH32CN1R0M53 or Taiyo Yuden LB2518 series) are preferred to support voltage-positioning behavior and maintain <50mV load transient deviation. Larger values (2.2µH–4.7µH) improve light-load efficiency but increase size and reduce switching frequency.
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:
- 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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