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Renesas EL7564CM
- Part No.:
- EL7564CM
- Manufacturer:
- Renesas
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
EL7564CM.pdf
- Description:
- IC REG BUCK ADJ 4A 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,293
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Product details
Overview
EL7564CM from Intersil is a monolithic synchronous step-down DC/DC regulator delivering 4A continuous output current with adjustable 1.0V–3.8V output voltage, 95% peak efficiency, and integrated NMOS power FETs in a 20-pin SO (0.300") fused-lead package. It serves as a core voltage supply for DSP/CPU subsystems requiring precise regulation, fast load transient response, and thermal monitoring in space-constrained desktop or portable systems.
For engineers reviewing the EL7564CM datasheet, EL7564CM pinout, EL7564CM application, or EL7564CM equivalent, key selection considerations include its fused-lead thermal path (pins 6, 7, 11, 12, 13), junction temperature sensing via VTJ, power tracking capability for multi-rail sequencing, and ±0.5% line/load regulation performance across -40°C to +85°C.
Technical Context
The EL7564CM implements fixed-frequency current-mode PWM control with patented resistorless on-chip current sensing, enabling cycle-by-cycle current limiting and excellent step-load response. Its oscillator supports external synchronization and adjustable frequency up to 1 MHz via COSC capacitor.
It integrates dual NMOS power FETs (30 mΩ typical high-side, 60 mΩ low-side), bootstrapped high-side gate drive (VHI/VDRV), and precision bandgap reference (±0.5% initial accuracy) with internal soft-start and over-temperature shutdown at 135°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - supports high-power DSP/CPU core rails without external FETs |
| Input Voltage Range | 4.5V to 5.5V - optimized for 5V intermediate bus architectures |
| Output Voltage Range | 1.0V to 3.8V adjustable - set via external FB divider with 0.975V reference |
| Efficiency | Up to 95% - enables compact thermal design with fused-lead SO20 package |
| Switching Frequency | Adjustable up to 1 MHz - allows optimization of size vs. EMI trade-offs |
| Thermal Shutdown | 135°C with 20°C hysteresis - protects silicon die during overload or poor PCB heatsinking |
| Line/Load Regulation | ±0.5% - ensures stable output under varying input and load conditions |
Pinout & Package
EL7564CM uses a 20-pin SO (0.300") package with fused-lead thermal enhancement: pins 6, 7, 11, 12, and 13 are internally connected to the die substrate to form a low-thermal-resistance path to PCB copper. Thermal resistance can reach 43°C/W with adequate heatsinking area and no airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Bandgap reference bypass | Connects 0.1µF capacitor to SGND to stabilize reference and reject noise |
| SGND (Pin 2) | Signal ground return | Isolated ground for control circuitry; must be separated from PGND except at single point |
| COSC (Pin 3) | Oscillator timing node | External capacitor sets switching frequency; supports sync input |
| VDD (Pin 4) | Control circuit supply | Bias supply for controller; typically RC-filtered from VIN |
| VTJ (Pin 5) | Junction temperature monitor | Outputs voltage linearly proportional to die temperature (TJ = (VTJ − 1.2)/0.00384 + 75) |
| PGND (Pins 6, 7, 11, 12, 13) | Power ground return | Fused leads provide primary thermal conduction path to PCB; connect directly to large copper pour |
| VIN (Pin 8) | Main power input | 4.5–5.5V supply input; connects to drain of high-side NMOS FET |
| STP (Pin 9) | Tracking positive input | 2 µA internal pull-down; used to synchronize startup with higher-voltage rail |
| STN (Pin 10) | Tracking negative input | 2 µA internal pull-up; enables offset or linear power tracking with STP |
| LX (Pins 14, 15) | Inductor switch node | High-current switching output; average voltage equals regulated VOUT |
| VHI (Pin 16) | High-side driver supply | Bootstrapped supply for high-side gate drive; requires 0.22µF capacitor to LX |
| VDRV (Pin 17) | Low-side driver supply | Provides gate drive for low-side FET and charges VHI bootstrap cap |
| PG (Pin 18) | Power good indicator | Open-drain logic output active when VOUT is within ±10% of target |
| FB (Pin 19) | Feedback input | 125 nA internal pull-up forces VOUT to SGND if floating; connects to resistor divider |
| EN (Pin 20) | Enable input | Active-high logic control; 2 µA internal pull-up enables device if left open |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous NMOS FETs | Eliminates need for external power switches; 30 mΩ high-side and 60 mΩ low-side RDS(on) enable high-efficiency 4A operation |
| Resistorless current sensing | Patented on-chip method provides accurate cycle-by-cycle current limit without external sense resistor or power loss |
| Power tracking (STP/STN) | Enables precise start-up sequencing of multiple supplies - critical for FPGA, multi-core CPU, or memory subsystems |
| Junction temperature indicator (VTJ) | Provides real-time die temperature measurement without external sensor, simplifying thermal validation and margin testing |
| Fused-lead SO20 package | Reduces θJA to 43°C/W (vs. ~85°C/W standard SO20), enabling higher power density in thermally constrained layouts |
Applications
| DSP Core Power Supply | CPU I/O Voltage Rail |
|---|---|
Use Scenario: Providing tightly regulated 1.2V–1.8V supply to digital signal processors in portable medical imaging or audio processing units. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 4A continuous current with <100 ns load-step response and ±0.5% regulation. Use Value: Enables reliable high-speed computation under dynamic load while minimizing board area and thermal management complexity. | Use Scenario: Generating 3.3V I/O supply for multi-core CPUs in industrial edge controllers with strict sequencing requirements relative to core voltage. IC Role / Device Role / Timing Role: Synchronized secondary regulator using STP/STN pins to track and delay startup after core rail reaches nominal voltage. Use Value: Prevents latch-up and ensures correct power-on reset behavior across heterogeneous processor domains. |
| Portable Equipment DC/DC Module | GTL+ Bus Power Supply |
Use Scenario: Compact 5V-to-2.5V conversion in battery-powered test equipment where efficiency and thermal performance dictate component count. IC Role / Device Role / Timing Role: Standalone step-down regulator with internal soft-start and PG indication for system-level power sequencing. Use Value: Achieves >92% efficiency at 2A load with minimal external components, reducing BOM cost and PCB footprint. | Use Scenario: Supplying GTL+ terminated buses in telecom line cards requiring fast transient response and tight voltage tolerance. IC Role / Device Role / Timing Role: High-bandwidth buck converter with current-mode control and 1.0V reference accuracy to maintain GTL+ signaling integrity. Use Value: Maintains <±25 mV output deviation during 3A load steps, ensuring signal eye diagram compliance and bit-error-rate stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL8024 | Pin-compatible 4A buck regulator with 2.7–5.5V input, 0.6–5.5V output, and 1MHz max frequency; includes spread-spectrum EMI reduction | Designed for newer designs requiring wider input range and lower quiescent current (25 µA vs. 3.5 mA) | Select ISL8024 for new designs needing extended input range, lower standby power, or EMI-sensitive environments |
| TPS544B20 | 4A PMBus-enabled buck with 4.5–18V input, 0.6–5.5V output, and integrated MOSFETs; supports digital voltage margining and telemetry | Targets systems requiring programmable configuration, fault logging, or dynamic voltage scaling via PMBus | Choose TPS544B20 when digital interface, telemetry, or wide-input industrial bus compatibility is required |
Compared with EL7564CM, ISL8024 offers broader input range and lower IQ but lacks VTJ monitoring; TPS544B20 adds digital control at the cost of higher complexity and price-making EL7564CM optimal for analog-controlled, thermally monitored, 5V-bus applications.
Availability
EL7564CM is available at Aetrix Electronics and suitable for DSP core supplies, CPU I/O rails, and portable DC/DC modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for EL7564CM 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
Intersil Corporation (now part of Renesas Electronics) is a U.S.-based analog and power management IC designer known for high-performance DC/DC regulators, precision references, and interface solutions.
The EL7564 product line was engineered for high-current, thermally demanding embedded power applications-specifically targeting DSP, CPU, and FPGA core voltage regulation where efficiency, sequencing, and die-temperature visibility are critical.
FAQ
What is the maximum continuous output current supported by the EL7564CM?
The EL7564CM supports 4A continuous output current at up to 95% efficiency. This rating assumes proper PCB thermal design-including connection of fused leads (pins 6, 7, 11, 12, 13) to sufficient copper area-and operation within the -40°C to +85°C ambient temperature range. Peak current limit is 5A with cycle-by-cycle protection.
How does the EL7564CM implement current sensing without an external resistor?
The EL7564CM uses a patented on-chip resistorless current sensing technique that monitors the inductor current flowing through the high-side NMOS FET during conduction. This eliminates external sense resistors, reduces power loss, and maintains accuracy across temperature-enabling precise cycle-by-cycle current limiting and robust over-current protection in the EL7564CM.
Can the EL7564CM be synchronized to an external clock source?
Yes, the EL7564CM supports external oscillator synchronization via the COSC pin. To ensure reliable locking, the free-running frequency must be set at least 20% lower than the sync source frequency using the COSC capacitor value. The minimum sync pulse width is 25 ns, and synchronization preserves the EL7564CM's current-mode control characteristics and transient performance.
What is the function of the VTJ pin on the EL7564CM, and how is it used?
The VTJ pin on the EL7564CM provides an analog voltage output linearly proportional to the silicon die junction temperature: TJ = (VTJ − 1.2)/0.00384 + 75. A 2.2nF capacitor to SGND filters noise, and the voltage can be measured directly with a voltmeter or ADC. This eliminates the need for external thermal sensors and enables real-time thermal margining and failure analysis in the EL7564CM.
Does the EL7564CM require external components for bootstrapping the high-side gate driver?
Yes, the EL7564CM requires a 0.22µF ceramic capacitor between VHI and LX pins to bootstrap the high-side NMOS gate driver. This capacitor charges when LX is near ground (during low-side conduction) and supplies the elevated gate voltage needed to fully enhance the high-side FET. Placement must be close to the pins, and X7R or better dielectric is recommended for stability across temperature in the EL7564CM.
EL7564CM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 3.8V
- Current - Output:
- 4A
- Frequency - Switching:
- 200kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
EL7564CM FAQ
1.How can I place an order for EL7564CM through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7564CM 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 EL7564CM reliable?
The price and inventory of EL7564CM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7564CM is usually 5 days.
3.What payment methods are accepted for EL7564CM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7564CM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7564CM?
EL7564CM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7564CM 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 EL7564CM?
For technical support, including EL7564CM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7564CM requirements.
6.How does Aetrix verify that EL7564CM is sourced from the original manufacturer or authorized distributors?
All EL7564CM 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 EL7564CM meets industry standards.
7.What is the process for return or replacement of EL7564CM?
All EL7564CM units undergo pre-shipment inspection (PSI). If there is an issue with EL7564CM, 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 EL7564CM part is unused and in its original packaging.
Return procedure for EL7564CM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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