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Analog Devices Inc./Maxim Integrated MAX8560EZK
- Part No.:
- MAX8560EZK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8560EZK.pdf
- Description:
- IC REG BUCK ADJ 500MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,280
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Product details
Overview
The MAX8560EZK from Maxim Integrated is a 4MHz, 500mA synchronous step-down DC-DC converter in a 5-pin Thin SOT23 package, optimized for space-constrained portable applications. It delivers adjustable output voltage from 0.6V to 2.5V with ±1.5% initial accuracy, 40µA typical quiescent current, and operates from a 2.7V–5.5V input. It is used as a core supply for microprocessors and RF power amplifiers in cellular handsets.
For engineers reviewing the MAX8560EZK datasheet, MAX8560EZK pinout, MAX8560EZK application, or MAX8560EZK equivalent, key selection criteria include guaranteed 500mA output current, internal synchronous rectification eliminating external Schottky diodes, fixed-frequency hysteretic-PWM control up to 4MHz, soft-start functionality, and thermal shutdown protection - all within a 2.9mm × 1.6mm × 1.1mm Thin SOT23 footprint.
Technical Context
The MAX8560EZK employs a proprietary hysteretic-PWM control architecture that maintains fixed switching frequency up to 4MHz while enabling trade-offs between efficiency and external component size. Its voltage-positioning feedback topology - sampling from the LX node via R1 - removes phase lag from the output capacitor, enabling stable regulation with only 2.2µF ceramic output capacitance.
Internal synchronous rectification integrates both P-channel high-side and N-channel low-side MOSFETs (RONP = 0.8–1.5Ω, RONN = 0.4–0.82Ω), eliminating external diode losses. The device enters pulse-skipping mode below 100mA load to maintain 40µA typical quiescent current, and features logic-controlled shutdown drawing just 0.1µA in sleep mode.
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 DSP/microprocessor core rails and CDMA PA bias supplies. |
| Switching Frequency | Up to 4MHz - enables use of sub-2.2µH inductors (e.g., 1µH) and reduces solution footprint by >40% vs. 1MHz converters. |
| Quiescent Current | 40µA (typ) - extends battery life in always-on or low-duty-cycle portable devices. |
| Output Voltage Accuracy | ±1.5% (initial, 25°C) - ensures tight regulation for sensitive digital core supplies requiring <±2% tolerance. |
| Feedback Threshold | 0.6V (nominal) - allows precise resistor-divider programming of 0.6V–2.5V outputs with minimal divider current. |
| Shutdown Current | 0.1µA - meets ultra-low-power system-level sleep requirements. |
Pinout & Package
MAX8560EZK is housed in a 5-pin Thin SOT23-5 package (2.9mm × 1.6mm × 1.1mm), with exposed pad not connected internally (no thermal pad tie required). Pin 1 is marked with a dot or beveled edge; pin numbering follows standard SOT23 convention (counterclockwise from mark).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply Input | Accepts 2.7V–5.5V input; 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 PCB ground plane. |
| 3 (SHDN) | Active-Low Enable | Pull low to disable converter and reduce supply current to 0.1µA; pull high or connect to IN for normal operation. |
| 4 (FB) | Voltage Feedback Input | Senses 0.6V reference point; connects to center of resistive divider (R1/R2) between LX and GND for output voltage setting. |
| 5 (LX) | Switch Node | Drain connection of internal P- and N-MOSFETs; drives external inductor; requires short, wide trace to minimize EMI and switching losses. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-Positioning Feedback | Uses LX node sensing to eliminate output capacitor phase lag, enabling stable loop with 2.2µF ceramic COUT and halving peak-to-peak output voltage excursions during load transients. |
| Internal Synchronous Rectification | Integrates matched P- and N-MOSFETs (RONP ≤ 1.5Ω, RONN ≤ 0.82Ω), removing need for external Schottky diode and improving full-load efficiency by ≥8% vs. asynchronous designs. |
| Programmable Output Voltage | 0.6V–2.5V range set via external resistor divider on FB pin - supports multiple core voltages (e.g., 1.2V for ARM cores, 1.8V for I/O) without changing IC. |
| Soft-Start Function | Internal ramp limits inrush current at startup, reducing required input capacitance and preventing brownout on high-impedance sources like coin cells. |
| Hysteretic-PWM Control | Fixed-frequency operation up to 4MHz with minimum on/off times (107ns/95ns) - ensures predictable EMI profile and fast transient response (<2µs settling). |
Applications
| Microprocessor Core Supply | CDMA RF Power Amplifier Bias |
|---|---|
|
Use Scenario: Powers ARM9 or similar low-voltage microprocessor core in smartphone application processor subsystem. IC Role / Device Role / Timing Role: Primary step-down regulator delivering tightly regulated 1.2V @ 500mA with fast load-transient response to handle CPU burst activity. Use Value: Voltage-positioning feedback reduces output voltage deviation to ±15mV during 100mA→500mA load steps, avoiding core reset or timing violations. |
Use Scenario: Supplies bias voltage to CDMA handset power amplifier during high-efficiency transmit mode. IC Role / Device Role / Timing Role: Adjustable-output buck converter configured for 2.5V output to match PA VCC requirements under varying battery voltage (3.2V–4.2V). Use Value: 4MHz switching allows compact 1µH inductor + 2.2µF ceramic capacitor solution, meeting stringent RF board area constraints. |
| Portable Media Player SoC Rail | Smartphone Baseband DSP Supply |
|
Use Scenario: Provides clean, low-noise 1.5V supply to audio/video codec or display controller in MP3 player or DSC. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter operating in pulse-skipping mode at light loads to extend playback time. Use Value: 40µA quiescent current enables >100-hour standby with 300mAh Li-ion battery, while 500mA capability supports video decode bursts. |
Use Scenario: Delivers stable 1.8V rail to baseband DSP in dual-mode (GSM/CDMA) smartphones. IC Role / Device Role / Timing Role: Primary power stage with thermal shutdown and UVLO protection ensuring reliable operation across temperature (-40°C to +85°C). Use Value: ±1.5% output accuracy and 0.6V FB threshold enable precise resistor-divider tuning to meet DSP manufacturer's 1.8V ±2% spec without margining. |
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 frequency; 400mA output current; 2.05V–6.0V input; 0.6V FB; 17µA IQ | Lower output current and frequency limit suitability for lower-power DSPs or sensors; smaller IQ benefits ultra-long-life IoT nodes. | Select when 400mA output suffices and lowest possible quiescent current (17µA) is prioritized over 500mA headroom. |
| RT8059NGSP | 2.5MHz max frequency; 600mA output; 2.5V–5.5V input; 0.6V FB; 30µA IQ; no voltage-positioning feedback | Lacks LX-sensed feedback - requires larger output capacitance (≥10µF) for comparable transient performance; higher current rating suits heavier-loaded peripherals. | Choose when higher output current (600mA) is needed and board layout allows larger COUT; avoid where strict voltage positioning is required for core rails. |
Compared with TPS62231DRYR and RT8059NGSP, the MAX8560EZK uniquely combines 500mA output, 4MHz switching, and voltage-positioning feedback in a 5-pin SOT23 - enabling smallest total solution size for portable core supplies where transient response and footprint are critical.
Availability
MAX8560EZK is available at Aetrix Electronics and suitable for microprocessor core supplies, CDMA RF power amplifier bias, and portable media player SoC rails requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX8560EZK 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 portable, industrial, and communications systems.
The MAX8560EZK belongs to Maxim's high-frequency synchronous buck converter family, designed specifically for space- and efficiency-critical battery-powered applications such as cellular handsets, PDAs, and portable media players.
FAQ
What is the maximum recommended switching frequency for the MAX8560EZK?
The MAX8560EZK supports a maximum switching frequency of 4MHz. This is achieved using its proprietary hysteretic-PWM control scheme, which maintains fixed frequency operation while allowing optimization of external component size. At 4MHz, the device enables use of 1µH inductors and small ceramic capacitors, significantly reducing total solution footprint compared to conventional 1MHz buck converters. The actual frequency varies slightly with load and inductor value, as shown in the Typical Operating Characteristics section of the datasheet.
Does the MAX8560EZK require an external Schottky diode?
No, the MAX8560EZK 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 and improves full-load efficiency by approximately 8–10% compared to asynchronous buck topologies. The internal rectifier is automatically controlled based on inductor current zero-crossing detection.
What is the purpose of the LX pin on the MAX8560EZK?
The LX pin on the MAX8560EZK is the switch node connecting the drains of the internal high-side P-MOSFET and low-side N-MOSFET. It drives the external inductor and serves as the sensing point for the voltage-positioning feedback network. Connecting the feedback resistor R1 to LX (rather than VOUT) removes phase lag introduced by the output capacitor, resulting in improved loop stability and faster transient response. Proper PCB layout - short, wide traces and minimized parasitic inductance - is essential for optimal LX node performance.
Can the MAX8560EZK be used with a 2.2µF output capacitor?
Yes, the MAX8560EZK is specifically optimized for use with a 2.2µF ceramic output capacitor. Its voltage-positioning feedback architecture - which senses from the LX node - eliminates the phase lag normally introduced by COUT, enabling stable regulation with minimal capacitance. This allows designers to achieve excellent load-transient response and low output ripple without needing larger, more expensive bulk capacitors. X5R or X7R dielectric ceramics are recommended for best performance across temperature.
What is the function of the SHDN pin on the MAX8560EZK?
The SHDN pin on the MAX8560EZK is an active-low logic input that controls device enable/disable state. When pulled low (≤0.4V), the IC enters shutdown mode, turning off both internal MOSFETs and reducing supply current to 0.1µA. When pulled high (≥1.41V) or connected to IN, the device operates normally. This pin supports system-level power sequencing and battery-saving modes in portable equipment. No external pull-up is required, as the internal circuitry provides appropriate biasing during operation.
MAX8560EZK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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:
- TSOT-23-5
MAX8560EZK FAQ
1.How can I place an order for MAX8560EZK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8560EZK 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 reliable?
The price and inventory of MAX8560EZK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8560EZK is usually 5 days.
3.What payment methods are accepted for MAX8560EZK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8560EZK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8560EZK?
MAX8560EZK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8560EZK 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?
For technical support, including MAX8560EZK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8560EZK requirements.
6.How does Aetrix verify that MAX8560EZK is sourced from the original manufacturer or authorized distributors?
All MAX8560EZK 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 meets industry standards.
7.What is the process for return or replacement of MAX8560EZK?
All MAX8560EZK units undergo pre-shipment inspection (PSI). If there is an issue with MAX8560EZK, 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 part is unused and in its original packaging.
Return procedure for MAX8560EZK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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