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Analog Devices Inc./Maxim Integrated MAX8560EZK+T
- Part No.:
- MAX8560EZK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8560EZK+T.pdf
- Description:
- IC REG BUCK ADJ 500MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,032
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Product details
Overview
The MAX8560EZK+T from Maxim Integrated is a 4MHz, 500mA synchronous step-down DC-DC converter in a 5-pin Thin SOT23 package, designed for space-constrained portable applications requiring high efficiency and ultra-low quiescent current (40µA typ). It delivers regulated output voltages from 0.6V to 2.5V with ±1.5% initial accuracy and features internal synchronous rectification, soft-start, and thermal shutdown.
For engineers reviewing the MAX8560EZK+T datasheet, MAX8560EZK+T pinout, MAX8560EZK+T application, or MAX8560EZK+T equivalent, this page provides verified technical context, confirmed pin functions, real-world application scenarios, and validated alternative options for microprocessor core supplies, CDMA RF power amplifier biasing, and battery-powered consumer electronics.
Technical Context
The MAX8560EZK+T employs a proprietary hysteretic-PWM control scheme operating 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.
It integrates a P-channel high-side switch and N-channel synchronous rectifier with on-resistances of 0.8Ω (typ) and 0.4Ω (typ), respectively, and supports input voltages from 2.7V to 5.5V. Shutdown reduces supply current to 0.1µA, while internal soft-start prevents inrush current during startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | Up to 4MHz - enables use of 1µH inductors and compact 2.2µF ceramic capacitors without sacrificing regulation stability. |
| Output Current | 500mA guaranteed - sufficient for microprocessor/DSP core rails and CDMA PA biasing under full load. |
| Quiescent Current | 40µA (typ) - extends battery life in always-on or low-duty-cycle portable devices like MP3 players and PDAs. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li+ (3.0–4.2V), alkaline (up to 4.5V), and regulated 3.3V/5V system rails. |
| Output Voltage Accuracy | ±1.5% (initial, TA = +25°C) - ensures tight core voltage tolerance for sensitive digital logic and analog circuitry. |
| Feedback Threshold | 0.6V nominal at FB pin - sets output via resistive divider; allows precise 0.6V–2.5V programming with standard 1% resistors. |
| Shutdown Current | 0.1µA (max, TA = +85°C) - minimizes battery drain in standby mode for cellular handsets and smart phones. |
Pinout & Package
Package: 5-pin Thin SOT23-5 (3.0mm × 1.7mm × 1.3mm), lead-free, exposed pad not present (MAX8560-specific).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power input | Accepts 2.7V–5.5V supply; requires local 2.2µF ceramic bypass capacitor to GND for noise suppression and transient response. |
| 2 GND | Analog/digital ground | Common reference for FB, SHDN, and internal circuitry; must be low-impedance connection to system ground plane. |
| 3 SHDN | Active-low enable | Pull low to enter 0.1µA shutdown; tie to IN or logic high for normal operation; no external pull-up required. |
| 4 FB | Voltage feedback input | Senses 0.6V reference point; connects to center of resistor divider between LX and GND for voltage positioning regulation. |
| 5 LX | Switch node | Drain connection of internal P-FET and N-FET; drives external inductor; requires short, wide trace to minimize EMI and switching losses. |
Key Features
| Feature | Design Value |
|---|---|
| Hysteretic-PWM control | Fixed-frequency switching up to 4MHz with automatic pulse-skipping below 100mA load - balances efficiency and component size across operating range. |
| Internal synchronous rectification | Eliminates need for external Schottky diode - reduces BOM count, PCB area, and conduction losses versus asynchronous buck topologies. |
| Voltage-positioning feedback | FB connected to LX via R1 removes output capacitor phase lag - enables stable loop with minimal 2.2µF X5R/X7R ceramic output capacitance. |
| Integrated soft-start | Gradually ramps output voltage at startup - limits inrush current into output capacitance, reducing stress on input source (e.g., Li+ cells). |
| Thermal shutdown protection | Activates at +160°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking conditions. |
Applications
| Microprocessor Core Supply | CDMA RF Power Amplifier Bias |
|---|---|
Use Scenario: Providing clean, tightly regulated 1.2V supply to ARM Cortex-M or DSP cores in handheld devices. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 500mA with fast transient response to handle dynamic CPU load changes. Use Value: Voltage-positioning load regulation halves peak-to-peak output excursion during load steps, maintaining core stability without oversized output caps. |
Use Scenario: Generating adjustable 2.5V or 1.8V bias for CDMA power amplifier stages in cellular handsets. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC-DC converter supporting rapid PA enable/disable cycles and battery voltage sag compensation. Use Value: 40µA quiescent current extends talk time; 4MHz switching avoids interference with RF bands while enabling tiny 1µH inductors. |
| Smartphone Application Processor Rail | Portable Media Player System Power |
Use Scenario: Powering application processor I/O or memory interface rails in dual-mode smartphones. IC Role / Device Role / Timing Role: Secondary buck converter supplying 1.8V or 2.5V from main 3.6V battery rail with minimal footprint. Use Value: Thin SOT23-5 package (3.0 × 1.7mm) fits tight board areas; ±1.5% output accuracy meets JEDEC DDR I/O voltage tolerances. |
Use Scenario: Delivering 1.2V–2.5V power to audio codecs, flash memory, and display drivers in MP3 players and DSCs. IC Role / Device Role / Timing Role: Single-chip solution replacing discrete regulators and diodes in cost-sensitive, battery-operated consumer gear. Use Value: Internal synchronous rectification and soft-start reduce total solution size by >30% versus legacy asynchronous designs with external diodes. |
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 |
|---|---|---|---|
| Texas Instruments TPS62231DRYR | 3MHz max switching frequency; 300mA output current; 2.05V–6.5V input range; 0.6V feedback threshold. | Limited to 300mA - unsuitable for 500mA microprocessor core loads; wider input range supports higher-voltage industrial rails. | Select when lower cost and TI ecosystem support outweigh need for 500mA output and 4MHz operation. |
| Analog Devices ADP2302ARMZ-R7 | 1.4MHz fixed frequency; 600mA output; 3.0V–20V input; 0.8V feedback threshold; requires external bootstrap capacitor. | Higher input voltage capability suits 12V intermediate rails; lacks voltage-positioning feedback and soft-start integration. | Choose for industrial or automotive systems with >5.5V inputs where MAX8560EZK+T's 5.5V limit is insufficient. |
Compared with the TPS62231DRYR and ADP2302ARMZ-R7, the MAX8560EZK+T uniquely combines 4MHz operation, 500mA output, and voltage-positioning feedback in a 5-pin SOT23-enabling smallest possible solution size for portable 2.7V–5.5V battery-powered applications.
Availability
MAX8560EZK+T is available at Aetrix Electronics and suitable for microprocessor core supplies, CDMA RF power amplifier biasing, and portable media player system power requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production lots.
Supply support for MAX8560EZK+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, mixed-signal, and power management ICs for industrial, communications, and consumer markets.
The MAX8560 series was designed specifically for ultra-compact, high-efficiency DC-DC conversion in battery-powered portable electronics-prioritizing small size, low IQ, and fast transient response over wide-input flexibility.
FAQ
What is the maximum supported switching frequency of the MAX8560EZK+T?
The MAX8560EZK+T supports a maximum switching frequency of 4MHz. This high-frequency capability allows designers to use smaller external inductors (down to 1µH) and ceramic output capacitors (as low as 2.2µF), significantly reducing solution footprint. The frequency is internally set and not user-adjustable, but the hysteretic-PWM architecture maintains stability and efficiency across the full 4MHz range.
Does the MAX8560EZK+T require an external Schottky diode?
No, the MAX8560EZK+T does not require an external Schottky diode. It integrates both a P-channel high-side switch and an N-channel synchronous rectifier, eliminating conduction losses and board space associated with external diodes. This internal synchronous rectification is confirmed in the device's functional diagram and electrical characteristics table, where RONN is specified at 0.4Ω (typ).
What is the purpose of the LX pin on the MAX8560EZK+T?
The LX pin on the MAX8560EZK+T is the switch node connecting the drains of the internal P-FET and N-FET. It drives the external inductor and serves as the sampling point for the voltage-positioning feedback network (via R1 to FB). Proper layout-short, wide traces and minimized loop area-is critical to reduce EMI and ensure stable operation, as emphasized in the PCB layout guidelines of the datasheet.
Can the MAX8560EZK+T be used with a 1.0V output voltage?
Yes, the MAX8560EZK+T can be configured for a 1.0V output using the external resistive feedback divider. With a 0.6V FB threshold, setting R1/R2 = 0.67 achieves 1.0V output (VOUT = 0.6V × (1 + R1/R2)). The device guarantees ±1.5% initial accuracy at this point, and its voltage-positioning architecture ensures stable regulation even with light-load transients typical in low-power logic rails.
What is the thermal shutdown behavior of the MAX8560EZK+T?
The MAX8560EZK+T activates thermal shutdown at +160°C junction temperature and includes 20°C hysteresis, meaning it resumes operation only after cooling to +140°C. This protects the IC during sustained overload, poor PCB heatsinking, or ambient temperature excursions. The shutdown is fully internal-no external components or configuration are needed-and is documented in the Absolute Maximum Ratings and Electrical Characteristics tables.
MAX8560EZK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- 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:
- TSOT-23-5
MAX8560EZK+T FAQ
1.How can I place an order for MAX8560EZK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8560EZK+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 MAX8560EZK+T reliable?
The price and inventory of MAX8560EZK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8560EZK+T is usually 5 days.
3.What payment methods are accepted for MAX8560EZK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8560EZK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8560EZK+T?
MAX8560EZK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8560EZK+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 MAX8560EZK+T?
For technical support, including MAX8560EZK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8560EZK+T requirements.
6.How does Aetrix verify that MAX8560EZK+T is sourced from the original manufacturer or authorized distributors?
All MAX8560EZK+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 MAX8560EZK+T meets industry standards.
7.What is the process for return or replacement of MAX8560EZK+T?
All MAX8560EZK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8560EZK+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 MAX8560EZK+T part is unused and in its original packaging.
Return procedure for MAX8560EZK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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