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Analog Devices Inc./Maxim Integrated MAX8562ETA-T
- Part No.:
- MAX8562ETA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX8562ETA-T.pdf
- Description:
- IC REG BUCK ADJ 500MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
The MAX8562ETA-T from Maxim Integrated is a synchronous step-down DC-DC converter optimized for space-constrained, high-efficiency applications such as CDMA power amplifier supplies. It delivers guaranteed 500mA output current with 40µA typical quiescent current, operates from 2.7V to 5.5V input, and features an adjustable 0.6V–2.5V output voltage regulated via external resistor divider. Its key differentiator is the ODO/ODI-controlled external bypass PFET drive capability.
For engineers reviewing the MAX8562ETA-T datasheet, MAX8562ETA-T pinout, MAX8562ETA-T application, or MAX8562ETA-T equivalent, this page provides verified functional identity, confirmed TDFN-8 package mapping, validated terminal roles (including ODO open-drain output and ODI digital control), real-world load-transient performance data, and two manufacturer-confirmed alternative parts for CDMA PA supply and dual-mode VCC architectures.
Technical Context
The MAX8562ETA-T implements a proprietary hysteretic-PWM control scheme with fixed-frequency switching up to 4MHz, enabling trade-offs between efficiency and external component size. Its voltage-positioning feedback architecture-sampling LX through R1-eliminates phase lag from COUT, ensuring loop stability with only 2.2µF ceramic output capacitance.
Unlike the MAX8561, the MAX8562ETA-T integrates an internal 10kΩ pullup from ODO to IN and uses ODI to force 100% duty cycle (ODI = high) or high-impedance ODO (ODI = low), enabling seamless integration with external bypass PFETs in high-power/low-power mode switching for RF power amplifiers.
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 CDMA PA bias and microprocessor core rails. |
| Quiescent Current | 40µA (typ) - enables >100-hour standby in portable devices with light-load pulse-skipping mode. |
| Switching Frequency | Up to 4MHz - allows use of sub-2.2µH inductors (e.g., LQH32CN1R0M53) for ultra-compact layouts. |
| FB Threshold Voltage | 0.6V ±1.5% (25°C) - sets precise output regulation point; accuracy degrades to ±2.5% over -40°C to +85°C. |
| Output Voltage Range | 0.6V to 2.5V - programmable via external resistive divider; supports DSP core, RF PA, and logic supply voltages. |
| Shutdown Current | 0.1µA - reduces system-level leakage during deep sleep modes. |
Pinout & Package
MAX8562ETA-T is housed in an 8-pin 3mm × 3mm × 0.8mm Thin DFN package with exposed thermal pad (EP) connected to GND. The package meets MO-229/WEEC standards and supports reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Voltage feedback input | Regulates output by comparing divided output voltage to 0.6V internal reference; connects to center tap of R1/R2 divider. |
| 2 ODO | Open-drain output | Drives external PFET gate; pulled up to IN via internal 10kΩ resistor when ODI = low; forced low when ODI = high. |
| 3 SHDN | Active-low shutdown control | Pulls low to disable converter and reduce IIN to 0.1µA; connect to IN or logic high for normal operation. |
| 4 GND | Analog ground | Reference for FB, SHDN, and ODI; must be connected separately from PGND to minimize noise coupling. |
| 5 PGND | Power ground | High-current return path for LX switch and synchronous rectifier; connects directly to EP for thermal management. |
| 6 LX | Switch node | Connects to drain terminals of internal P- and N-channel MOSFETs; requires short, low-inductance trace to inductor. |
| 7 IN | Input supply | 2.7V–5.5V main power input; bypassed with 2.2µF X5R/X7R ceramic capacitor placed adjacent to IN and PGND. |
| 8 ODI | Digital input for ODO control | Logic-high forces ODO low (100% duty cycle); logic-low places ODO in high-Z state with 10kΩ pullup to IN. |
Key Features
| Feature | Design Value |
|---|---|
| Internal synchronous rectification | Eliminates need for external Schottky diode; improves full-load efficiency by ≥8% vs. asynchronous designs. |
| Voltage-positioning transient response | Reduces peak-to-peak output voltage excursion by 50% during load steps (e.g., 20mA → 500mA) vs. standard buck converters. |
| Bypass FET drive capability | Enables seamless transition between low-power buck mode and high-power direct-battery mode in CDMA PA applications. |
| Soft-start circuitry | Prevents inrush current at startup; reduces required input capacitance and avoids brownout on high-impedance sources like Li+ cells. |
| Thermal shutdown protection | Activates at +160°C with 20°C hysteresis; prevents permanent damage during sustained overload or poor PCB heatsinking. |
Applications
| CDMA Power Amplifier Supply | Microprocessor Core Rail |
|---|---|
Use Scenario: Dual-mode RF power amplifier in cellular handsets requiring fast switching between low-power (buck-regulated) and high-power (battery-direct) VCC paths. IC Role / Device Role / Timing Role: MAX8562ETA-T controls external bypass PFET via ODI/ODO signals while regulating core voltage during LP mode; enables <20µs mode transition. Use Value: Eliminates need for discrete PMOS driver and level shifter; reduces BOM count by 3 components and saves 3mm² PCB area. |
Use Scenario: Core supply for low-voltage DSPs or ARM-based microcontrollers operating at 1.0V–1.5V with dynamic load currents from 10mA to 500mA. IC Role / Device Role / Timing Role: MAX8562ETA-T delivers tightly regulated output with ±1.5% initial accuracy and fast transient recovery (<2µs to settle within 20mV). Use Value: Maintains processor stability during burst-mode execution; supports 4MHz switching to shrink inductor size without sacrificing efficiency at 200mA+ loads. |
| Smartphone Baseband SoC | Portable Media Player Logic Supply |
Use Scenario: Primary voltage regulator for baseband ICs in smartphones where input is shared Li+ battery rail (3.0V–4.2V) and output must track 1.2V ±2%. IC Role / Device Role / Timing Role: MAX8562ETA-T provides regulated 1.2V with 40µA quiescent current in idle state and rapid load-step response to modem transmit bursts. Use Value: Achieves >90% efficiency at 300mA load with 1µH inductor; extends talk time by 12% vs. older 1.5MHz converters using same passive components. |
Use Scenario: Logic supply for MP3 decoder ASICs and display controllers in battery-powered media players with aggressive standby requirements. IC Role / Device Role / Timing Role: MAX8562ETA-T enters pulse-skipping mode below 100mA, maintaining 40µA IQ while delivering stable 1.8V output. Use Value: Enables >2-week playback time on single charge; soft-start prevents audio pop during power-on sequencing. |
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 |
|---|---|---|---|
| MAX8561ETA-T | Lacks ODO/ODI; instead provides logic-controlled dual-output voltage selection via ODO open-drain toggle. | Suitable for systems needing two fixed regulated outputs (e.g., 1.5V/1.0V) but not external FET control. | Select MAX8561ETA-T when dual-voltage sequencing is required without external PFET drive. |
| TPS62231DRYT | TI part with 3MHz max frequency, 300mA output, and integrated 0.6V reference; no ODO/ODI pins. | Targeted at general-purpose low-IQ buck applications; lacks dedicated bypass-FET interface for CDMA PA. | Choose TPS62231DRYT for cost-sensitive, non-CDMA applications where 300mA output suffices and layout simplicity is prioritized. |
Compared with MAX8561ETA-T and TPS62231DRYT, the MAX8562ETA-T uniquely combines 500mA output, 4MHz switching, and ODI/ODO-controlled external PFET drive-making it the only option among the three qualified for CDMA power amplifier VCC management with zero additional driver components.
Availability
MAX8562ETA-T is available at Aetrix Electronics and suitable for CDMA power amplifier supplies, microprocessor core rails, and portable media player logic supplies requiring stable component supply across extended temperature ranges (-40°C to +85°C) and long production lifecycles.
Supply support for MAX8562ETA-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 and mixed-signal ICs for power management, sensing, and communications.
The MAX856x family was designed specifically for space-constrained, battery-powered RF and portable computing applications demanding high efficiency at light loads and fast transient response under dynamic load conditions.
FAQ
What is the primary function of the ODI and ODO pins on the MAX8562ETA-T?
The ODI (pin 8) and ODO (pin 2) pins enable external bypass PFET control in the MAX8562ETA-T. When ODI is driven high, ODO is actively pulled low, forcing the buck converter into 100% duty cycle to pass input voltage directly to the output. When ODI is low, ODO floats high-impedance with a 10kΩ internal pullup to IN-allowing the external PFET to conduct during high-power mode. This functionality is unique to the MAX8562ETA-T within the MAX856x family and is essential for CDMA PA dual-mode operation.
Does the MAX8562ETA-T require an external Schottky diode?
No, the MAX8562ETA-T does not require an external Schottky diode because it integrates synchronous rectification using internal N-channel and P-channel MOSFETs. The NFET acts as the synchronous rectifier, eliminating conduction losses associated with external diodes and improving full-load efficiency by up to 8% compared to asynchronous buck converters. This also reduces thermal stress and simplifies PCB layout.
What is the minimum recommended output capacitor value for stable operation of the MAX8562ETA-T?
The minimum recommended output capacitor for stable operation of the MAX8562ETA-T is 2.2µF ceramic (X5R or X7R dielectric). Due to its voltage-positioning feedback architecture-which samples the LX node-the MAX8562ETA-T achieves loop stability with significantly smaller output capacitance than conventional buck converters. Using less than 2.2µF may compromise load-transient response and increase output ripple beyond specification limits.
How does the MAX8562ETA-T achieve low quiescent current during light-load operation?
The MAX8562ETA-T achieves 40µA typical quiescent current by automatically entering pulse-skipping mode below ~100mA load. In this mode, the controller disables switching cycles when the output voltage remains above regulation threshold, minimizing gate-drive and bias current consumption. This behavior is inherent to its proprietary hysteretic-PWM architecture and is verified across the full -40°C to +85°C operating range, making it ideal for battery standby applications.
Is the MAX8562ETA-T pin-compatible with other members of the MAX856x family?
No, the MAX8562ETA-T is not pin-compatible with the MAX8560 or MAX8561 despite sharing the same 8-pin TDFN package footprint. While all three use the same physical package, the MAX8562ETA-T assigns pin 2 to ODO and pin 8 to ODI-functions absent in the MAX8560 (5-pin SOT23) and differently implemented in the MAX8561 (ODO-only, no ODI). Swapping parts without board revision will result in incorrect or nonfunctional ODO/ODI signaling.
MAX8562ETA-T 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 to 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-T FAQ
1.How can I place an order for MAX8562ETA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8562ETA-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 MAX8562ETA-T reliable?
The price and inventory of MAX8562ETA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8562ETA-T is usually 5 days.
3.What payment methods are accepted for MAX8562ETA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8562ETA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8562ETA-T?
MAX8562ETA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8562ETA-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 MAX8562ETA-T?
For technical support, including MAX8562ETA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8562ETA-T requirements.
6.How does Aetrix verify that MAX8562ETA-T is sourced from the original manufacturer or authorized distributors?
All MAX8562ETA-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 MAX8562ETA-T meets industry standards.
7.What is the process for return or replacement of MAX8562ETA-T?
All MAX8562ETA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8562ETA-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 MAX8562ETA-T part is unused and in its original packaging.
Return procedure for MAX8562ETA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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