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Renesas ISL8560MREP
- Part No.:
- ISL8560MREP
- Manufacturer:
- Renesas
- Package:
- 20-VQFN Exposed Pad
- Datasheet:
-
ISL8560MREP.pdf
- Description:
- IC REG BUCK ADJ 2A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,077
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Product details
Overview
ISL8560MREP from Renesas (formerly Intersil) is a radiation-hardened, enhanced-product-grade step-down DC/DC switching regulator with 9.0V to 60V input range, 2A output current capability, and adjustable output voltage from 1.21V to 55V via external resistor divider. It integrates a 0.19Ω rDS(ON) internal DMOS FET and supports 100kHz–600kHz switching frequency for industrial avionics power supplies.
For engineers reviewing the ISL8560MREP datasheet, ISL8560MREP pinout, ISL8560MREP application, or ISL8560MREP equivalent, key selection considerations include its MIL-TEMP operation (−55°C to +125°C), load dump tolerance (100V/400ms), pulse-by-pulse current limiting, hiccup-mode short-circuit protection, and Frequency SYNC capability for system-level timing coordination.
Technical Context
The ISL8560MREP implements voltage feedforward regulation to improve transient response across wide VIN/VOUT ratios and uses an internal 1.21V ±1% reference for precise output setting. Its thermal shutdown, soft-start, and PGOOD signal provide robust system-level fault management.
It operates in continuous conduction mode (CCM) with zero-load current operation and achieves high efficiency via low RDS(ON) FET and optimized gate drive. The SYNC pin enables external clock synchronization to avoid beat frequencies in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 9.0V to 60V - supports wide-input industrial and avionics bus rails including 24V, 28V, and 48V systems. |
| Output Current | 2A continuous - rated per thermal limits at max junction temperature; requires proper PCB copper area for QFN thermal dissipation. |
| Output Voltage Range | 1.21V to 55V - set externally via resistor divider; 1.21V reference enables accurate low-VOUT regulation. |
| Switching Frequency | 100kHz to 600kHz - adjustable via RTCT pin; higher frequencies reduce external inductor size but increase switching losses. |
| Standby Current | 60µA typical - enables ultra-low-power disable state for battery-backed or always-on subsystems. |
| Load Dump Tolerance | 100V for 400ms - withstands automotive-style load dump transients without latch-up or damage. |
| Operating Temperature | −55°C to +125°C - full electrical performance over extended military temperature range per VID V62/08608. |
Pinout & Package
ISL8560MREP is housed in a thermally enhanced 20-lead 6mm × 6mm QFN package (JEDEC MO-220VJJB compliant) with exposed thermal pad (D2/E2 = 3.33–3.53mm) for direct PCB thermal coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 15, 16, 17, 18) | Input Power Supply | Four parallel pins minimize trace inductance and IR drop; must be decoupled locally with low-ESR ceramic capacitors. |
| LX (Pins 1, 2, 5, 6) | Switch Node | High-current switching node connecting internal FET source to external inductor; requires tight layout and minimal loop area. |
| PGND (Pin 7) | Power Ground | High-current return path for LX and internal FET; separate from SGND to prevent noise coupling into control circuitry. |
| SGND (Pin 11) | Signal Ground | Analog ground reference for FB, COMP, REF, SS, and PGOOD; must be connected to PGND at single point near device. |
| FB (Pin 14) | Feedback Input | Resistor-divider connection point for output voltage sensing; high-impedance input referenced to SGND. |
| COMP (Pin 13) | Compensation Node | Connects external Type II/III compensation network to stabilize voltage loop; directly interfaces error amplifier output. |
| SYNC (Pin 8) | Frequency Synchronization Input | Accepts external clock signal (100kHz–600kHz) to synchronize switching and eliminate beat frequencies in multi-converter systems. |
| EN (Pin 3) | Enable Control | Active-high logic input; pulls up internally to VCC5; allows sequencing and remote on/off control with hysteresis. |
| PGOOD (Pin 12) | Power Good Output | Open-drain signal indicating regulated output within ±10% window; used for system power sequencing and fault reporting. |
| SS (Pin 10) | Soft-Start Timing | Connects external capacitor to control ramp rate of output voltage during startup; prevents inrush current and overshoot. |
| RTCT (Pin 9) | Frequency Setting | Connects external resistor to set switching frequency; internal current source charges external capacitor for oscillator timing. |
| VCC5 (Pin 19) | Bias Supply Output | 5V regulated output powering internal circuitry and optionally external bias components; current-limited to ~10mA. |
| BOOT (Pin 4) | High-Side Gate Drive | Connects external bootstrap capacitor between BOOT and LX to generate gate drive voltage for internal high-side FET. |
| REF (Pin 15) | Internal Reference Output | Provides 1.21V ±1% precision reference for external monitoring or auxiliary circuitry; low-noise, buffered output. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage Feedforward Regulation | Improves line transient response by scaling PWM duty cycle with VIN, enabling stable operation across 9V–60V input variation. |
| Pulse-by-Pulse Current Limit | Monitors peak switch current each cycle to protect internal FET under overload or short-circuit conditions without thermal stress. |
| Hiccup Mode Short-Circuit Protection | Disables switching after fault detection, waits fixed interval, then retries - limits average power dissipation during sustained shorts. |
| Frequency SYNC Capability | Allows external clock injection to align switching edges across multiple ISL8560MREP units, eliminating beat frequencies and EMI peaks. |
| Zero Load Current Operation | Maintains regulation with no output load, supporting standby modes in always-on avionics subsystems without dropout or instability. |
Applications
| Avionics Power Distribution | Industrial 24V/48V Systems |
|---|---|
Use Scenario: Primary DC-DC conversion in airborne mission computers requiring uninterrupted operation under extreme temperature and vibration. IC Role / Device Role / Timing Role: Step-down regulator delivering stable 3.3V/5V/12V rails from 28V aircraft bus while surviving load dump and MIL-STD-704 transients. Use Value: Full −55°C to +125°C performance and 100V/400ms load dump tolerance ensure reliability in uncontrolled environmental enclosures. | Use Scenario: Distributed power architecture in factory automation PLCs with wide-input fieldbus supply (24V nominal, up to 60V during surge). IC Role / Device Role / Timing Role: Point-of-load regulator generating isolated 5V logic supply for I/O modules with synchronized switching to reduce conducted EMI. Use Value: SYNC pin enables deterministic switching alignment across multiple rails, simplifying EMI filter design and compliance testing. |
| Battery Charger Front-End | Ruggedized Portable Computing |
Use Scenario: Constant-current/constant-voltage stage in Li-ion battery chargers powered from variable solar or vehicle inputs (12V–48V). IC Role / Device Role / Timing Role: Adjustable-output buck converter regulating charging voltage with precision feedback and hiccup-mode safety during cell fault. Use Value: 1.21V reference accuracy and pulse-by-pulse current limit enable ±0.5% CV regulation and safe CC termination under fault. | Use Scenario: Main system rail generation in handheld test equipment operating from hot-swappable 24V batteries. IC Role / Device Role / Timing Role: High-efficiency 2A buck converter supplying processor core voltage with soft-start and PGOOD sequencing for cold-boot reliability. Use Value: 60µA standby current extends battery life in sleep mode; PGOOD enables controlled wake-up of downstream peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC/DC regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5V–65V input, 1A output, integrated 0.55Ω FET, no internal reference output. | Automotive AEC-Q100 qualified; lacks REF pin and MIL-TEMP rating; lower current capability. | Preferred for automotive environments where AEC-Q100 compliance is mandatory and 1A output suffices. |
| MAX5035DASA+T | 7.5V–76V input, 2A output, 1.22V reference, no SYNC or hiccup mode; SO-8 package. | Commercial-temp only (−40°C to +85°C); no load dump rating; larger footprint and inferior thermal performance than QFN. | Consider for cost-sensitive industrial designs where MIL-TEMP and load dump immunity are not required. |
Compared with LM5164QPWPRQ1 and MAX5035DASA+T, the ISL8560MREP uniquely delivers 2A output with full MIL-TEMP operation, 100V/400ms load dump tolerance, and dedicated REF/PGOOD/SYNC pins-making it the only choice for space-constrained, high-reliability avionics and defense platforms.
Availability
ISL8560MREP is available at Aetrix Electronics and suitable for industrial avionics power supplies, ruggedized portable computing, and battery charger front-end designs requiring stable component supply across extended temperature and high-transient environments.
Supply support for ISL8560MREP 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
Renesas Electronics acquired Intersil in 2017 and maintains legacy high-reliability analog product lines including radiation-tolerant and enhanced-product devices.
The ISL8560MREP belongs to Renesas' Enhanced Product (EP) DC/DC regulator family, designed specifically for defense, aerospace, and critical infrastructure applications demanding guaranteed long-term supply and DLA-compliant specifications.
FAQ
What is the maximum allowable input voltage transient for ISL8560MREP?
The ISL8560MREP is rated for 100V input transients lasting up to 400ms, per its load dump specification. This exceeds standard automotive ISO 7637-2 requirements and ensures survivability during alternator load dump events in avionics and vehicle-mounted systems. The device remains functional without latch-up or parameter shift when subjected to this stress condition, provided thermal limits are observed. Always verify PCB layout and input capacitance meet the transient energy absorption requirements outlined in FN6621.
Does ISL8560MREP require an external bootstrap capacitor?
Yes, ISL8560MREP requires an external bootstrap capacitor connected between BOOT and LX pins to sustain high-side gate drive voltage. A typical value is 0.1µF X7R ceramic placed as close as possible to the BOOT and LX pins. This capacitor recharges on each switching cycle through the internal bootstrap diode and enables full enhancement of the internal DMOS FET. Omission or undersizing causes erratic switching or failure to start.
Can ISL8560MREP operate with zero output load?
Yes, ISL8560MREP supports zero-load current operation while maintaining regulation, as confirmed in FN6621 datasheet Section 1.1. This feature enables use in always-on subsystems such as watchdog timers or real-time clocks powered from the same rail. The device sustains stable feedback loop behavior and does not enter burst mode or drop out of regulation, even with no connected load - critical for avionics health-monitoring circuits.
What is the purpose of the REF pin on ISL8560MREP?
The REF pin on ISL8560MREP provides a buffered, low-noise 1.21V ±1% precision voltage reference derived from the internal bandgap. It can power external monitoring circuitry, ADC references, or auxiliary comparators without loading the FB node. Unlike the FB input, REF is not part of the regulation loop - it serves solely as a stable calibration source. Its availability eliminates need for external reference ICs in high-accuracy measurement subsystems.
How is thermal performance managed in the 20-lead QFN package of ISL8560MREP?
The ISL8560MREP's 6mm × 6mm QFN package (L20.6x6B) features an exposed thermal pad (D2/E2) that must be soldered to a large PCB copper pour for effective heat transfer. Thermal resistance θJA is highly dependent on PCB layout: ≥4 cm² of 2-oz copper with 4–6 thermal vias (0.3mm diameter, spaced ≤1mm apart) reduces θJA to ~40°C/W. Without proper thermal land design, junction temperature may exceed 125°C under 2A load at high ambient, triggering thermal shutdown.
ISL8560MREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-VQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 9V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.21V
- Voltage - Output (Max):
- 55V
- Current - Output:
- 2A
- Frequency - Switching:
- 100kHz ~ 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (6x6)
ISL8560MREP FAQ
1.How can I place an order for ISL8560MREP through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8560MREP 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 ISL8560MREP reliable?
The price and inventory of ISL8560MREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8560MREP is usually 5 days.
3.What payment methods are accepted for ISL8560MREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8560MREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8560MREP?
ISL8560MREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8560MREP 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 ISL8560MREP?
For technical support, including ISL8560MREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8560MREP requirements.
6.How does Aetrix verify that ISL8560MREP is sourced from the original manufacturer or authorized distributors?
All ISL8560MREP 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 ISL8560MREP meets industry standards.
7.What is the process for return or replacement of ISL8560MREP?
All ISL8560MREP units undergo pre-shipment inspection (PSI). If there is an issue with ISL8560MREP, 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 ISL8560MREP part is unused and in its original packaging.
Return procedure for ISL8560MREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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