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Renesas ISL8560IRZ
- Part No.:
- ISL8560IRZ
- Manufacturer:
- Renesas
- Package:
- 20-VQFN Exposed Pad
- Datasheet:
-
ISL8560IRZ.pdf
- Description:
- IC REG BUCK ADJ 2A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:364
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Product details
Overview
ISL8560IRZ from Renesas (formerly Intersil) is a non-synchronous buck DC/DC switching regulator with integrated 2A N-channel MOSFET, operating from 9.0V to 60V input and delivering adjustable output voltage from 1.21V to 55V. It features internal 1.21V ±1% reference, 100kHz–600kHz programmable switching frequency, and pulse-by-pulse current limiting-designed for industrial power supplies requiring robust load dump tolerance (100V/400ms) and hiccup-mode short-circuit protection.
For engineers reviewing the ISL8560IRZ datasheet, ISL8560IRZ pinout, ISL8560IRZ application, or ISL8560IRZ equivalent, this page delivers verified technical context, validated pin functions, real-world application mappings, and two confirmed alternative parts with documented functional and application-level differences-enabling rapid selection for high-input-voltage step-down designs in automotive and industrial environments.
Technical Context
The ISL8560IRZ implements voltage feedforward PWM control with an internal transconductance error amplifier (gm = 5.7 mS, GBW = 15 MHz), enabling stable regulation across wide VIN ranges without complex loop compensation. Its architecture integrates a high-side DMOS switch (rDS(ON) = 0.19 Ω typical) and supports external synchronous rectification via diode replacement.
Protection logic includes thermal shutdown at +150°C (15°C hysteresis), overcurrent detection with seven-cycle hiccup recovery, and undervoltage lockout (UVLO rising threshold = 8.9V, hysteresis = 0.3V). The SYNC pin accepts TTL-compatible external clock signals up to 600kHz, while RTCT sets oscillator frequency via R–C network with ±10% total variation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 9.0V to 60V - supports wide-range industrial and automotive battery inputs including 24V/48V systems and load dump transients up to 100V for 400ms. |
| Output Current | 2A continuous - delivered via integrated N-MOSFET with 0.19Ω rDS(ON); requires external Schottky diode for freewheeling path. |
| Output Voltage Range | 1.21V to 55V - set by external resistor divider referenced to internal 1.21V ±1% bandgap; enables single IC for multiple rail generation. |
| Switching Frequency | 100kHz to 600kHz - adjustable via RTCT pin; supports SYNC input for system-level clock alignment and EMI reduction. |
| Shutdown Current | 60µA typical - enables low-power standby in always-on systems; EN pin logic-low enables operation with internal pull-up. |
| Thermal Protection | +150°C shutdown / +135°C restart - ensures safe operation under sustained overload or poor heatsinking in sealed enclosures. |
| Package | 20-lead 6×6 mm QFN with exposed thermal pad - provides θJA = 30°C/W and θJC = 1.5°C/W for efficient power dissipation in compact layouts. |
Pinout & Package
ISL8560IRZ is housed in a 20-lead, 6mm × 6mm QFN package (L20.6x6B) with exposed thermal pad on underside for enhanced thermal performance. Pin numbering follows top-view orientation as defined in FN9244 Rev 7.00.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX (Pins 1, 2, 15, 16) | Power Switch Node | Four paralleled connections to internal high-side MOSFET drain; must be tied together externally and routed with low-inductance layout for stability. |
| BOOT (Pin 3) | High-Side Gate Drive Supply | Connects to external bootstrap capacitor (CBOOT) between BOOT and LX; enables gate drive above VIN for N-MOSFET conduction. |
| EN (Pin 4) | Enable Control Input | Active-low enable; internal pull-up holds device disabled if floating; logic-low (≤1.2V) initiates soft-start sequence. |
| VCC5 (Pin 5) | Internal 5V LDO Output | Provides regulated 5.0V ±0.1V supply for internal circuitry; requires 1µF bypass capacitor to SGND for noise suppression. |
| SYNC (Pin 6) | External Clock Synchronization Input | TTL-compatible digital input; synchronizes internal oscillator to external signal ≥100kHz; unused pin may be left open or grounded. |
| RTCT (Pin 7) | Oscillator Timing Interface | Resistor-to-VIN and capacitor-to-SGND set switching frequency; voltage-rated capacitor must withstand full VIN during disable state. |
| SGND (Pin 8) | Analog Ground Reference | Return path for feedback, error amplifier, and control circuitry; must be separated from PGND to minimize noise coupling into regulation loop. |
| FB (Pin 9) | Feedback Input | Connects to resistor divider output; monitors output voltage against 1.21V internal reference; bias current ≤±100nA minimizes divider error. |
| COMP (Pin 10) | Error Amplifier Output | Provides GM amplifier output for external loop compensation; connects to RC network for phase margin tuning and transient response optimization. |
| REF (Pin 11) | 1.21V Reference Output | Stable bandgap reference; bypassed with 0.01µF capacitor to SGND to suppress noise affecting FB accuracy. |
| PGOOD (Pin 12) | Open-Drain Power-Good Flag | Asserts low when output deviates >±10% from setpoint; includes 3µs noise filter; requires external pull-up for system monitoring. |
| PGND (Pin 13) | Power Ground Return | Low-impedance return path for high-current switching node (LX) and input capacitors; must connect directly to exposed thermal pad. |
| SS (Pin 14) | Soft-Start Timing Input | Charged by internal 10µA current source; capacitor value determines ramp time (tSS ≈ 8.3·CSS µs); supports pre-biased start-up. |
| VIN (Pins 17–20) | Main Input Supply | Four paralleled inputs accepting 9–60V; connects to bulk input capacitors and high-current traces; shares PGND return path. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage Feedforward Regulation | Compensates for input ripple without additional sensing; simplifies loop design and improves line transient rejection across 9–60V range. |
| Pulse-by-Pulse Current Limit | Monitors high-side MOSFET current cycle-by-cycle; limits peak switch current to 4.0A typical, preventing thermal runaway during overload. |
| Hiccup-Mode Short-Circuit Protection | Enters 4-soft-start-cycle recovery delay after seven consecutive overcurrent events; reduces average power dissipation during fault conditions. |
| Load Dump Tolerance | Sustains 100V input for 400ms per ISO 7637-2 Pulse 5a - eliminates need for external TVS in automotive 24V systems. |
| Zero-Load Operation | Maintains regulation with no output load; enables use in always-on subsystems without minimum load requirements or external dummy loads. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Distributed 5V/12V rails in PLC I/O modules powered from 24V DC bus with intermittent load dumps. IC Role / Device Role / Timing Role: Primary step-down regulator converting 24V bus to isolated 5V logic supply; handles 100V/400ms transients without shutdown. Use Value: Eliminates external TVS and reduces BOM count; 60µA shutdown current extends battery backup runtime during maintenance mode. |
Use Scenario: Central body controller supplying 5V to door locks, lighting, and sensors in 12V/24V vehicle platforms. IC Role / Device Role / Timing Role: Non-synchronous buck converter with hiccup-mode protection; manages short circuits in motor-driven actuators. Use Value: Survives ISO 7637-2 Pulse 5a load dump events; soft-start prevents inrush current tripping fuse during cold cranking. |
| Portable Test Equipment | Distributed Telecom Power |
|
Use Scenario: Battery-powered oscilloscope with dual 3.3V/5V rails derived from 12–48V Li-ion pack. IC Role / Device Role / Timing Role: Adjustable-output buck regulator supporting multiple output voltages via resistor change; operates down to 9V input. Use Value: Single IC replaces multiple fixed-output regulators; 100kHz–600kHz frequency tuning enables optimal efficiency vs. size trade-off. |
Use Scenario: Remote radio unit (RRU) requiring 12V intermediate bus from 48V telecom supply with strict EMI limits. IC Role / Device Role / Timing Role: SYNC-capable controller synchronized to baseband clock to shift switching noise away from sensitive RF bands. Use Value: Reduces conducted EMI peaks by >15dB through deterministic frequency alignment; maintains 90%+ efficiency at 2A load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QWRNXTQ1 | Synchronous buck with integrated high/low FETs; 3–65V input; 1A output; no internal REF; requires external compensation. | Better light-load efficiency due to synchronous rectification; lacks load dump rating and hiccup-mode recovery. | Choose LM5164QWRNXTQ1 when efficiency at <100mA load is critical and input transients are clamped externally. |
| MAX20006AATP/V+T | Automotive-grade synchronous buck; 3.5–60V input; 2.5A output; AEC-Q100 qualified; integrated current sense; no SYNC pin. | Includes diagnostic reporting (fault flags) and higher current capability; no frequency synchronization or feedforward architecture. | Choose MAX20006AATP/V+T for ASIL-B systems requiring built-in diagnostics and guaranteed automotive qualification. |
Compared with ISL8560IRZ, LM5164QWRNXTQ1 offers higher light-load efficiency but requires external transient protection and lacks hiccup-mode recovery, while MAX20006AATP/V+T provides AEC-Q100 compliance and diagnostics but sacrifices frequency synchronization and voltage feedforward benefits essential for wide-input industrial designs.
Availability
ISL8560IRZ is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, portable test equipment, and distributed telecom power systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for ISL8560IRZ 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 full technical and manufacturing continuity for legacy Intersil analog power products.
The ISL8560IRZ belongs to Renesas' industrial-grade DC/DC regulator portfolio, designed specifically for high-input-voltage step-down applications in harsh environments where reliability under load dump, wide temperature operation, and robust fault protection are mandatory.
FAQ
What is the maximum input voltage the ISL8560IRZ can withstand during load dump events?
The ISL8560IRZ is rated for 100V input for 400ms per ISO 7637-2 Pulse 5a, making it suitable for automotive 24V systems without external TVS diodes. This rating is validated in the datasheet absolute maximum ratings table and confirmed in the Applications Information section. The device sustains this stress while maintaining functionality and does not require derating of normal 9–60V operating range. ISL8560IRZ achieves this via internal process hardening and robust gate oxide design-not external circuitry.
Does the ISL8560IRZ support synchronous rectification?
No, the ISL8560IRZ is a non-synchronous buck regulator and requires an external Schottky diode for the freewheeling path. Its internal power stage consists of a single N-channel MOSFET; there is no integrated low-side switch or synchronous control logic. The datasheet explicitly states "non-synchronous, integrated FET" and recommends B2100 Schottky diodes in typical schematics. ISL8560IRZ cannot be configured for synchronous operation-even with external gate drivers-due to lack of complementary drive signals or dead-time control.
How is the soft-start time determined for the ISL8560IRZ?
The soft-start time for ISL8560IRZ is set by an external capacitor connected from SS pin to SGND, charged by an internal 10µA current source. The approximate duration is tSS ≈ 8.3·CSS microseconds, where CSS is in µF. For example, a 100nF capacitor yields ~0.83ms ramp time. This relationship is derived from Equation 1 in the datasheet and verified in Figure 24 (soft-start waveforms). ISL8560IRZ supports pre-biased start-up, allowing controlled ramp even when output voltage is initially non-zero.
What is the function of the VCC5 pin on the ISL8560IRZ?
The VCC5 pin on ISL8560IRZ provides a regulated 5.0V ±0.1V output sourced from an internal LDO, intended solely for powering internal circuitry-not for external loads. It requires a 1µF ceramic capacitor to SGND for stability and noise filtering. Datasheet Section "Pin Descriptions" explicitly states "not planned that the user would use this supply," and electrical specs limit its output current to 5mA maximum. ISL8560IRZ relies on this rail for biasing the error amplifier, oscillator, and protection comparators.
Can the ISL8560IRZ operate with zero output load?
Yes, the ISL8560IRZ supports zero-load operation across its full input and output voltage ranges. The datasheet confirms "Zero load current operation" in the Features list and demonstrates stable regulation at IOUT = 0A in Figures 8–11 (VOUT regulation vs. load) and Figure 21 (steady-state no-load waveform). Unlike many controllers requiring minimum load for stability, ISL8560IRZ maintains regulation using voltage feedforward and adaptive timing-making it suitable for always-on standby rails. This behavior is intrinsic to ISL8560IRZ's control architecture and does not require external dummy loads.
ISL8560IRZ 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:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (6x6)
ISL8560IRZ FAQ
1.How can I place an order for ISL8560IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8560IRZ 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 ISL8560IRZ reliable?
The price and inventory of ISL8560IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8560IRZ is usually 5 days.
3.What payment methods are accepted for ISL8560IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8560IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8560IRZ?
ISL8560IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8560IRZ 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 ISL8560IRZ?
For technical support, including ISL8560IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8560IRZ requirements.
6.How does Aetrix verify that ISL8560IRZ is sourced from the original manufacturer or authorized distributors?
All ISL8560IRZ 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 ISL8560IRZ meets industry standards.
7.What is the process for return or replacement of ISL8560IRZ?
All ISL8560IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8560IRZ, 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 ISL8560IRZ part is unused and in its original packaging.
Return procedure for ISL8560IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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