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Renesas EL7566DREZ-T7
- Part No.:
- EL7566DREZ-T7
- Manufacturer:
- Renesas
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
EL7566DREZ-T7.pdf
- Description:
- IC REG BUCK ADJ 6A 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,770
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Product details
Overview
EL7566DREZ-T7 from Intersil is a monolithic synchronous step-down DC/DC regulator delivering up to 6A continuous output current with 96% peak efficiency, operating from 3V–6V input and supporting adjustable output voltages from 0.8V to near VIN. It integrates PMOS/NMOS power FETs, features 100% duty cycle capability, internal soft-start, ±5% voltage margining, and junction temperature monitoring via VTJ pin-designed for FPGA core/I/O and DSP/CPU supply rails.
For engineers reviewing the EL7566DREZ-T7 datasheet, EL7566DREZ-T7 pinout, EL7566DREZ-T7 application, or EL7566DREZ-T7 equivalent, key selection considerations include its 28-pin HTSSOP package with exposed thermal pad, programmable 200–1000 kHz switching frequency, integrated overtemperature (135°C trip) and overvoltage (110% of VOUT) protection, and support for multi-rail power sequencing via STP/STN pins.
Technical Context
The EL7566DREZ-T7 employs peak current-mode control with on-chip resistorless current sensing derived from the upper PMOS switch, enabling fast transient response and stable operation without external current-sense resistors. Its PWM controller uses slope-compensated ramp generation synchronized to an internal oscillator whose frequency is set by COSC capacitor value.
Startup behavior is digitally controlled: soft-start ramps output over 2 ms by default, but can be extended or synchronized using STP/STN pins for tracking or cascaded sequencing. The device supports full-feature power-good signaling (PG), junction temperature monitoring (VTJ), and voltage margining (TM/SEL pins) for manufacturing validation-all implemented in a single monolithic IC with no external gate drivers required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 6A continuous - supports high-current FPGA core and CPU I/O rails without external current boosting. |
| Input Voltage Range | 3V to 6V - compatible with single-cell Li-ion, 3.3V/5V system rails, and intermediate bus architectures. |
| Output Voltage Range | 0.8V to ~VIN - enables low-voltage logic supplies and near-input regulation for minimal dropout loss. |
| Switching Frequency | 200 kHz to 1 MHz - adjustable via COSC capacitor; higher frequencies allow smaller inductors and reduce PCB footprint to ≤0.72 in². |
| Efficiency | Up to 96% - achieved via integrated low-RDS(on) PMOS (29 mΩ typ.) and NMOS (25 mΩ typ.) power switches. |
| Thermal Protection | 135°C overtemperature shutdown with 20°C hysteresis - prevents latch-up and enables automatic recovery after cooling. |
| Reference Accuracy | ±1.6% (1.24V–1.28V) - ensures tight output regulation across load, line, and temperature for precision digital loads. |
| Power-Good Threshold | ±10% window (VPGP/VPGN) - provides reliable enable/disable signaling for downstream logic and sequenced power systems. |
Pinout & Package
EL7566DREZ-T7 is housed in a 28-lead HTSSOP package (MDP0048) with exposed thermal pad, RoHS-compliant Pb-free + anneal finish, and 0°C to +85°C ambient operating range. Thermal pad must be soldered to PCB ground plane with ≥6 thermal vias for optimal junction-to-ambient thermal resistance (θJA = 26°C/W on 2-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (COMP) | Error amplifier output | Connect loop compensation network (RC/CC) here to stabilize feedback control loop. |
| 3 (FB) | Voltage feedback input | Connects to resistor divider between VOUT and SGND to set output voltage; also accepts speed-up capacitor. |
| 8–13 (LX) | Inductor drive node | High-current switched node; average voltage equals regulated output; requires low-inductance layout to PGND. |
| 16–18 (PGND) | Power ground return | Low-side FET source connection; must be tied directly to thermal pad and separated from SGND at single point. |
| 19–21 (VIN) | Main power input | Supplies high-side PMOS drain; requires low-ESR ceramic input capacitors placed adjacent to these pins. |
| 22 (VDD) | Internal bias supply | Internally derived from VIN via 20Ω resistor; powers control circuitry; bypass with 0.047µF to SGND. |
| 23 (PG) | Power-good indicator | Open-drain output active-high when VOUT is within ±10%; used for system enable sequencing and fault detection. |
| 24 (EN) | Enable input | Active-high logic input with 2.5µA internal pull-up; capacitor to SGND adds programmable startup delay. |
| 25 (STP), 26 (STN) | Tracking inputs | Enable synchronized start-up with auxiliary supplies; STP tied to VO1, STN to VO2 for linear tracking configuration. |
| 27 (COSC) | Oscillator timing | Connect capacitor to SGND to set switching frequency; 390pF yields ~370 kHz per datasheet curve. |
| 28 (SGND) | Signal ground reference | Control circuit common; must connect to PGND at single point near SGND pin to avoid noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PMOS/NMOS power FETs | Eliminates need for external gate drivers and boot circuitry; enables 100% duty cycle operation without external components. |
| Junction temperature monitor (VTJ) | Provides analog voltage proportional to die temperature (TJ = (VTJ − 1.2)/0.00384 + 75); enables real-time thermal characterization without sensors. |
| ±5% voltage margining | Configurable via TM/SEL pins for production test validation; shifts output voltage up/down by 5% without hardware changes. |
| Multi-supply start-up tracking | STP/STN pins support four configurations (adjustable, cascade, linear, offset) for precise sequencing of multiple rails. |
| Overvoltage protection (OVP) | Shuts down high-side FET and pulls PG low if VOUT exceeds 110% of target; recovers automatically after fault clears. |
| Internal soft-start | Digital 2 ms ramp limits inrush current during startup; extendable via RC network on STP/STN for complex power trees. |
Applications
| FPGA Core Supply | DSP/CPU I/O Supply |
|---|---|
|
Use Scenario: Powering 0.8V–1.2V core rails of Xilinx or Intel FPGAs requiring fast transient response and tight voltage tolerance. IC Role / Device Role / Timing Role: Primary buck regulator delivering up to 6A with <100 µs load-step recovery and ±1% output accuracy. Use Value: Integrated current-mode control and low-RDS(on) FETs maintain regulation under 3A/µs load transients without external compensation. |
Use Scenario: Generating 1.8V or 2.5V I/O supplies for TI C6000 DSPs or ARM-based SoCs with multi-rail sequencing requirements. IC Role / Device Role / Timing Role: Synchronized secondary regulator using STP/STN pins to track main core rail during power-up and brownout. Use Value: Eliminates need for external tracking ICs; supports linear, cascade, and offset start-up modes for flexible BOM consolidation. |
| Logic/Bus Voltage Regulator | Portable Equipment Power Rail |
|
Use Scenario: Providing 3.3V or 2.5V for PCI Express, DDR memory interfaces, or high-speed serial buses in industrial controllers. IC Role / Device Role / Timing Role: Fixed-frequency PWM regulator with PG output ensuring clean enable signaling to bus controllers and PHYs. Use Value: 96% efficiency and 0.72 in² one-side layout minimize heat and space in dense backplane designs. |
Use Scenario: Powering application processors and display subsystems in handheld medical devices or ruggedized tablets. IC Role / Device Role / Timing Role: Compact, thermally robust DC/DC solution with junction temperature monitoring for battery-powered thermal management. Use Value: VTJ pin enables firmware-based thermal throttling; RoHS-compliant Pb-free HTSSOP meets portable product environmental compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z | 4A output, 4.5–24V input, fixed 500kHz fSW, no voltage margining or VTJ monitoring | Lacks thermal monitoring and production test margining; suited for cost-sensitive non-critical rails | Select MP2315DJ-LF-Z only when 4A output suffices and thermal validation is not required. |
| TPS54620RGYT | 6A output, 4.5–17V input, 200kHz–1.7MHz fSW, integrated MOSFETs, but no junction temp monitor or margining | Wider input range and higher max fSW, yet missing VTJ and TM/SEL functions critical for manufacturing test | Choose TPS54620RGYT for broader input voltage needs where thermal telemetry and voltage stress testing are unnecessary. |
Compared with MP2315DJ-LF-Z and TPS54620RGYT, EL7566DREZ-T7 uniquely combines 6A capability with built-in junction temperature monitoring and ±5% voltage margining-making it the only option among the three qualified for production-level reliability validation and thermal-aware embedded systems.
Availability
EL7566DREZ-T7 is available at Aetrix Electronics and suitable for FPGA core supplies, DSP/CPU I/O rails, and logic/bus voltage regulation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for EL7566DREZ-T7 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, designs high-performance analog and power management ICs for industrial, computing, and communications markets with ISO9001-certified manufacturing.
The EL7566 product line delivers monolithic synchronous buck regulators optimized for high-current, low-voltage digital loads-including FPGA, ASIC, and microprocessor core/I/O supplies-with integrated protection, sequencing, and thermal telemetry.
FAQ
What is the maximum output current rating of the EL7566DREZ-T7?
The EL7566DREZ-T7 is rated for 6A continuous output current under typical thermal conditions (θJA = 26°C/W, TA = 25°C). Peak current limit is 7.8A, and the device includes overcurrent protection that disables the high-side FET if this threshold is exceeded. Derating applies above 85°C ambient or with insufficient PCB copper area.
Does the EL7566DREZ-T7 support external synchronization of its switching frequency?
Yes, the EL7566DREZ-T7 supports external synchronization via its COSC pin using the circuit shown in Figure 20 of FN7102 Rev 7.00. An external sync source drives COSC through a 100pF capacitor; the internal oscillator frequency must be set 20% lower than the sync frequency to accommodate component tolerances and ensure lock stability.
How is the output voltage programmed on the EL7566DREZ-T7?
The EL7566DREZ-T7 uses a resistor divider connected between VOUT and SGND, with the FB pin tapping the midpoint. Output voltage is calculated as VOUT = 0.8 × (1 + R1/R2), where R1 connects from VOUT to FB and R2 from FB to SGND. Table 1 in FN7102 lists standard values-for example, 21.5kΩ and 10kΩ yield 2.5V.
What is the function of the VTJ pin on the EL7566DREZ-T7?
The VTJ pin on the EL7566DREZ-T7 outputs an analog voltage proportional to junction temperature: TJ = (VTJ − 1.2)/0.00384 + 75. This allows direct measurement of die temperature without external sensors, supporting thermal design validation and firmware-based throttling in embedded systems using the EL7566DREZ-T7.
Can the EL7566DREZ-T7 operate with 100% duty cycle, and what is the minimum input voltage required?
Yes, the EL7566DREZ-T7 supports true 100% duty cycle operation due to its PMOS high-side switch, enabling VOUT to approach VIN minus IR drops. Minimum input voltage is 3V per absolute ratings; however, stable regulation below ~3.2V depends on load and thermal conditions, as VDD must remain above 2.65V for startup and 2.4V for shutdown.
EL7566DREZ-T7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 6A
- Frequency - Switching:
- 200kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
EL7566DREZ-T7 FAQ
1.How can I place an order for EL7566DREZ-T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7566DREZ-T7 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 EL7566DREZ-T7 reliable?
The price and inventory of EL7566DREZ-T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7566DREZ-T7 is usually 5 days.
3.What payment methods are accepted for EL7566DREZ-T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7566DREZ-T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7566DREZ-T7?
EL7566DREZ-T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7566DREZ-T7 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 EL7566DREZ-T7?
For technical support, including EL7566DREZ-T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7566DREZ-T7 requirements.
6.How does Aetrix verify that EL7566DREZ-T7 is sourced from the original manufacturer or authorized distributors?
All EL7566DREZ-T7 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 EL7566DREZ-T7 meets industry standards.
7.What is the process for return or replacement of EL7566DREZ-T7?
All EL7566DREZ-T7 units undergo pre-shipment inspection (PSI). If there is an issue with EL7566DREZ-T7, 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 EL7566DREZ-T7 part is unused and in its original packaging.
Return procedure for EL7566DREZ-T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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