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Renesas EL7564CMZ
- Part No.:
- EL7564CMZ
- Manufacturer:
- Renesas
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
EL7564CMZ.pdf
- Description:
- IC REG BUCK ADJ 4A 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,166
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Product details
Overview
EL7564CMZ 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 MOSFETs-designed for DSP/CPU core power in desktop and portable systems.
For engineers reviewing the EL7564CMZ datasheet, EL7564CMZ pinout, EL7564CMZ application, or EL7564CMZ equivalent, key selection criteria include its 20-pin SOIC package, junction temperature monitoring (VTJ), power tracking capability, and ±0.5% load/line regulation performance.
Technical Context
The EL7564CMZ implements fixed-frequency current-mode PWM control using patented resistorless on-chip current sensing, enabling cycle-by-cycle current limiting and fast transient response. Its oscillator supports external synchronization and adjustable frequency up to 1 MHz via COSC capacitor.
It integrates dual NMOS power FETs (30–60 mΩ RDS(on)), a precision 1.26 V reference (±0.5% initial accuracy), and auxiliary tracking inputs (STP/STN) for coordinated multi-rail startup sequencing-critical for logic bus and GTL+ supply applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4 A continuous-supports high-current DSP/CPU core loads without external FETs. |
| Input Voltage Range | 4.5 V to 5.5 V-optimized for 5 V rail operation with tight UVLO thresholds (4.0–4.35 V turn-on). |
| Output Voltage Range | 1.0 V to 3.8 V adjustable via FB resistor divider-enables precise core voltage setting for multiple logic families. |
| Efficiency | Up to 95%-achieved via synchronous rectification and low RDS(on) integrated FETs, reducing thermal load in compact layouts. |
| Switching Frequency | Adjustable up to 1 MHz via COSC-allows trade-off between size (smaller inductors/caps) and EMI/noise performance. |
| Thermal Protection | Junction temperature indicator (VTJ) and over-temperature shutdown at 135°C-enables real-time die thermal monitoring without external sensors. |
| Regulation Accuracy | ±0.5% line/load regulation-ensures stable output under dynamic load and input variation, critical for sensitive digital loads. |
Pinout & Package
EL7564CMZ is housed in a Pb-free, RoHS-compliant 20-pin SOIC (0.300") package with fused leads (#6, #7, #11, #12, #13) optimized for thermal conduction to PCB copper area-achieving θJA = 43°C/W with proper layout.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VREF | Bandgap reference bypass (0.1 µF to SGND)-stabilizes internal 1.26 V reference and rejects noise. |
| 2 | SGND | Signal ground reference-separate from PGND to prevent switching noise coupling into feedback path. |
| 3 | COSC | Oscillator timing capacitor connection-sets switching frequency; enables sync input when externally driven. |
| 4 | VDD | Control circuit supply (typically RC-filtered from VIN)-powers internal logic, drivers, and reference. |
| 5 | VTJ | Junction temperature monitor output-provides linear voltage (1.2 V @ 25°C, slope −3.84 mV/°C) for thermal telemetry. |
| 6,7,11,12,13 | PGND | Power ground return for low-side FET-fused leads form primary thermal path to PCB copper heat-sinking area. |
| 8 | VIN | Main power input (4.5–5.5 V)-connects to drain of high-side FET; requires local 0.22 µF bypass. |
| 9 | STP | Tracking positive input-2 µA internal pull-down; used to synchronize startup with higher-voltage rail. |
| 10 | STN | Tracking negative input-2 µA internal pull-up; enables offset or linear tracking with STP for multi-rail sequencing. |
| 14–15 | LX | High-current inductor switch node-drives external 4.7 µH inductor; average voltage equals regulated VOUT. |
| 16 | VHI | High-side gate drive bootstrap supply-charged via 0.22 µF capacitor from VDRV to enable NMOS high-side switching. |
| 17 | VDRV | Low-side driver supply & high-side bootstrap source-typically tied to VIN; powers internal gate drivers. |
| 18 | PG | Power good open-drain output-asserts high when VOUT is within ±10% of target, enabling system power sequencing. |
| 19 | FB | Voltage feedback input-125 nA internal pull-up forces safe shutdown if floating; connects to resistor divider for output setting. |
| 20 | EN | Enable input (active-high)-2 µA internal pull-up allows standalone operation; capacitor adds programmable start-up delay. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous MOSFETs | Eliminates need for external power switches-reduces BOM count, layout complexity, and footprint in space-constrained designs. |
| Resistorless current sensing | Enables true cycle-by-cycle current limiting without sense resistor losses or board area-improves efficiency and reliability. |
| Power tracking (STP/STN) | Supports deterministic multi-supply startup sequencing-essential for GTL+, CPU I/O, and memory interface power integrity. |
| Junction temperature indicator (VTJ) | Provides real-time die temperature measurement-replaces external thermal sensors and simplifies thermal characterization. |
| Internal soft start & overvoltage protection | Prevents inrush current and output overshoot during startup-ensures robust power delivery to sensitive digital loads. |
Applications
| DSP/CPU Core Supply | Logic/Bus Power |
|---|---|
Use Scenario: Providing tightly regulated 1.8 V or 2.5 V core voltage to a high-performance DSP in a portable medical imaging device. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 4 A continuous current with <100 ns load-step response and ±0.5% regulation. Use Value: Maintains stable core voltage during burst-mode processing, preventing timing violations and data corruption. | Use Scenario: Generating 3.3 V bus supply for PCI Express or DDR memory interfaces in an industrial controller. IC Role / Device Role / Timing Role: Synchronous buck converter with power-good signaling and multi-rail tracking for coordinated system power-up. Use Value: Ensures clean, sequenced power delivery to avoid bus contention and initialization failures during cold start. |
| GTL+ Bus Power | DC/DC Converter Module |
Use Scenario: Delivering 1.2 V GTL+ termination voltage with fast transient response for high-speed backplane communication. IC Role / Device Role / Timing Role: Adjustable-output buck regulator with precision reference and low-noise feedback path. Use Value: Achieves sub-10 mV output ripple and <50 mV load-step deviation-meeting GTL+ signal integrity requirements. | Use Scenario: Serving as the main regulator in a compact, isolated DC/DC module for telecom base station subsystems. IC Role / Device Role / Timing Role: High-efficiency, thermally robust power stage with junction temperature monitoring and fault reporting. Use Value: Enables predictive thermal management and field-replaceable module design without derating. |
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 4 A buck regulator with 2.7–5.5 V input, 0.6–5.5 V output, and 1.5 MHz max frequency-higher switching frequency but no VTJ or STP/STN tracking. | Designed for newer platforms requiring smaller magnetics; lacks multi-rail tracking and junction temperature telemetry. | Select ISL8024 for space-constrained designs needing higher frequency and broader input range-but retain EL7564CMZ where thermal monitoring or supply sequencing is required. |
| TPS544B20 | 4 A, 4.5–18 V input, 0.6–5.5 V output, PMBus-enabled buck with integrated FETs-adds digital configuration and telemetry, but larger 24-pin QFN package. | Targeted at programmable power systems with telemetry needs; not drop-in due to different pinout, control interface, and thermal pad requirements. | Choose TPS544B20 only when digital control, margining, or remote monitoring are mandatory-otherwise EL7564CMZ offers simpler analog implementation and lower cost. |
Compared with ISL8024 and TPS544B20, the EL7564CMZ uniquely combines analog simplicity, built-in power tracking, and direct junction temperature sensing in a mature 20-pin SOIC package-making it optimal for cost-sensitive, thermally aware, multi-rail embedded power designs where digital interfaces are unnecessary.
Availability
EL7564CMZ is available at Aetrix Electronics and suitable for DSP core supplies, logic bus power, and GTL+ termination applications requiring stable component supply across industrial and portable equipment lifecycles.
Supply support for EL7564CMZ 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-efficiency DC/DC solutions and precision references.
The EL7564 product line was developed specifically for high-current, thermally constrained embedded power applications-emphasizing integration, thermal telemetry, and multi-rail sequencing in standard surface-mount packages.
FAQ
What is the maximum continuous output current supported by the EL7564CMZ?
The EL7564CMZ delivers 4 A continuous output current under specified thermal conditions (TA ≤ 85°C, proper PCB copper area). This rating assumes use of the recommended 4.7 µH inductor and 330 µF output capacitance, with peak efficiency achieved at 3.3 V output from 5 V input. The device incorporates cycle-by-cycle current limiting and thermal shutdown to protect against overload conditions beyond this rating.
Does the EL7564CMZ require external MOSFETs for operation?
No, the EL7564CMZ does not require external MOSFETs. It integrates both high-side and low-side NMOS power FETs with typical RDS(on) of 30 mΩ (high-side) and 30 mΩ (low-side), enabling full 4 A synchronous buck operation with only external passive components: inductor, input/output capacitors, feedback resistors, and bootstrap capacitor. This integration reduces solution size and improves efficiency compared to controller-only alternatives.
How is output voltage set on the EL7564CMZ?
Output voltage on the EL7564CMZ is set via an external resistor divider connected to the FB pin. For the EL7564CMZ variant, the nominal feedback reference is 0.975 V, so VOUT = 0.975 × (1 + R2/R1). A 125 nA internal pull-up current ensures safe shutdown if FB is left floating. The resistor values must be selected to maintain adequate divider current (>1 µA) while minimizing noise susceptibility-typical designs use R1 = 1 kΩ and R2 = 2.37 kΩ for 3.3 V output.
What is the function of the VTJ pin on the EL7564CMZ?
The VTJ pin on the EL7564CMZ provides a linear voltage output proportional to junction temperature: VTJ = 1.2 − 0.00384 × (TJ − 25), where TJ is in °C. This enables real-time die temperature monitoring without external sensors-critical for thermal management in sealed or fanless systems. The pin connects to a 2.2–3.3 nF capacitor to SGND for noise filtering, and its output can feed an ADC or comparator for thermal throttling or fault logging in the EL7564CMZ-based design.
Can the EL7564CMZ be synchronized to an external clock?
Yes, the EL7564CMZ supports external oscillator synchronization via the COSC pin. When an external clock is applied, the internal oscillator locks to it-enabling noise reduction through frequency alignment in multi-regulator systems. To ensure reliable locking, the free-running frequency (set by COSC capacitor) must be at least 20% lower than the external sync source frequency to accommodate component and temperature variations, as specified in the FN7297 datasheet.
EL7564CMZ 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
EL7564CMZ FAQ
1.How can I place an order for EL7564CMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7564CMZ 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 EL7564CMZ reliable?
The price and inventory of EL7564CMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7564CMZ is usually 5 days.
3.What payment methods are accepted for EL7564CMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7564CMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7564CMZ?
EL7564CMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7564CMZ 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 EL7564CMZ?
For technical support, including EL7564CMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7564CMZ requirements.
6.How does Aetrix verify that EL7564CMZ is sourced from the original manufacturer or authorized distributors?
All EL7564CMZ 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 EL7564CMZ meets industry standards.
7.What is the process for return or replacement of EL7564CMZ?
All EL7564CMZ units undergo pre-shipment inspection (PSI). If there is an issue with EL7564CMZ, 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 EL7564CMZ part is unused and in its original packaging.
Return procedure for EL7564CMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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