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Renesas ISL8036IRZ
- Part No.:
- ISL8036IRZ
- Manufacturer:
- Renesas
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ISL8036IRZ.pdf
- Description:
- IC REG BUCK ADJ 3A SGL/DL 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:258
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Product details
Overview
ISL8036IRZ from Renesas Electronics (formerly Intersil) is a dual-channel synchronous buck regulator IC delivering up to 3A per channel at 1MHz switching frequency, featuring integrated P- and N-channel MOSFETs, 180° phase interleaving for EMI reduction, and independent power-good outputs. It operates from 2.85V to 6V input and supports output voltages down to 0.8V - ideal for powering microcontrollers, FPGAs, and DSPs in space-constrained Li-ion–powered systems.
For engineers reviewing the ISL8036IRZ datasheet, ISL8036IRZ pinout, ISL8036IRZ application, or ISL8036IRZ equivalent, key selection criteria include guaranteed 3A per channel output, internal digital soft-start (1.5ms), 2% output voltage accuracy over temperature/load/line, reverse overcurrent protection, and current-sharing mode enabling 6A single-output operation with reduced ripple.
Technical Context
The ISL8036IRZ implements current-mode PWM control with internal slope compensation and dual independent error amplifiers referenced to a precise 0.8V feedback threshold. Each channel features dedicated enable (EN1/EN2), power-good (PG1/PG2), and feedback (FB1/FB2) pins, supporting both independent dual-output and interleaved current-sharing configurations.
Its 180° out-of-phase switching reduces input RMS current and minimizes input capacitor stress, while the integrated 100%-duty-cycle capability enables ultra-low dropout operation (<250mV at 3A). External synchronization up to 6MHz allows system-level clock alignment without compromising stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A per channel, guaranteed minimum - enables reliable POL delivery for high-speed logic without derating. |
| Switching Frequency | 1MHz fixed (ISL8036 variant) - balances efficiency, size, and EMI for mid-power DC/DC conversion. |
| Input Voltage Range | 2.85V to 6V - supports single Li⁺ cell, three NiMH cells, or regulated 5V rails. |
| Output Voltage Accuracy | ±2% over temperature, load, and line - ensures stable core voltage for µC/FPGA under dynamic conditions. |
| Feedback Reference | 0.8V ±10mV - sets precise regulation point via external resistor divider; enables outputs as low as 0.8V. |
| Soft-Start Time | 1.5ms (SS tied to VDD) - prevents inrush current during power-up in multi-rail systems. |
| Power-Good Delay | 1ms rising-edge delay - provides deterministic sequencing signal for downstream logic enable. |
| Thermal Shutdown | 150°C with 25°C hysteresis - protects against sustained overload or poor heatsinking in sealed enclosures. |
Pinout & Package
ISL8036IRZ is housed in a thermally enhanced 24-lead 4mm × 4mm QFN package (L24.4x4D) with exposed thermal pad (Pin 25), rated for -40°C to +85°C ambient operation. The package supports high-current routing and efficient PCB heat dissipation when the pad is connected to SGND with multiple vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX1, LX2 (Pins 18–19, 1–24) | Switch node for Channel 1 and Channel 2 | Connects directly to inductor terminals; carries high di/dt switching current - requires short, low-inductance layout. |
| PGND1, PGND2 (Pins 20–21, 22–23) | Power ground return for respective channel power stages | Separate PGND paths minimize noise coupling between channels; must be joined to SGND at single point near exposed pad. |
| VIN1, VIN2 (Pins 16–17, 2–3) | Input supply for each channel | Each channel has dedicated input pins - enables independent input filtering or rail separation for noise-sensitive applications. |
| EN1, EN2 (Pins 13, 4) | Independent enable inputs | Active-high logic control; drives output into soft-discharge shutdown when low - supports flexible power sequencing. |
| PG1, PG2 (Pins 11, 5) | Power-good status outputs | Open-drain signals with 1ms delay - used for system reset assertion or downstream enable timing coordination. |
| FB1, FB2 (Pins 9, 6) | Feedback inputs for output voltage regulation | Monitor output via resistor dividers; internally referenced to 0.8V - enables precise, adjustable output voltage setting. |
| SYNC (Pin 12) | External synchronization input | Negative-edge-triggered; accepts up to 6MHz clock - eliminates beat frequencies in multi-regulator systems. |
| SS (Pin 14) | Soft-start timing control | Connected to capacitor to SGND; 5µA internal current source sets ramp time - prevents overshoot during startup. |
| COMP (Pin 7) | Compensation network connection | Required for current-sharing mode; bypassed in standard dual-output operation - enables loop stability tuning for parallel use. |
| VDD (Pin 15) | Logic supply input | Must be biased within ±0.5V of VIN - powers internal control circuitry independently of power stage voltage. |
| SGND (Pin 10) | System ground reference | Reference for FB, COMP, EN, PG, SYNC, SS - must be isolated from noisy PGND until joined at thermal pad. |
| NC (Pin 8) | No-connect terminal | Internally unconnected - must be tied to SGND for mechanical stability and EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3A synchronous buck regulation | Integrated P/N-MOSFETs eliminate external switches - reduces BOM count and layout area by >30% vs discrete solutions. |
| 180° interleaved phase operation | Cuts input RMS current by ~30% and halves output ripple frequency - lowers input capacitor requirements and EMI filter complexity. |
| 6A current-sharing mode | Enables single 6A output using shared inductor and output capacitor - simplifies high-current POL design without doubling board area. |
| Internal digital soft-start (1.5ms) | Eliminates need for external RC timing network - improves startup repeatability and reduces component count in compact designs. |
| Reverse overcurrent protection | Detects negative current flow during light-load or transient conditions - prevents damage during output short or inductive kickback. |
| 100% duty-cycle capability | Supports <250mV dropout at 3A - extends usable input range in battery-powered systems nearing end-of-discharge. |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
|
Use Scenario: Point-of-load voltage regulation on dense compute boards where space and thermal density are constrained. IC Role / Device Role / Timing Role: Dual-channel DC/DC converter providing independent 1.8V/3A and 0.8V/3A rails to processor cores and I/O banks. Use Value: Interleaved operation reduces input capacitance requirement by 40% and eases EMI compliance in Class B environments. |
Use Scenario: Powering heterogeneous SoCs with multiple voltage domains requiring tight sequencing and accuracy. IC Role / Device Role / Timing Role: Primary regulator supplying core, memory, and auxiliary rails with independent EN/PG control for safe boot order. Use Value: ±2% output accuracy and 1ms PG delay ensure reliable initialization across -40°C to +85°C industrial operating range. |
| Plug-in DC/DC Modules for Routers and Switchers | Li-ion Battery Power Devices |
|
Use Scenario: Hot-pluggable power modules in carrier-grade networking equipment requiring fast fault recovery. IC Role / Device Role / Timing Role: Dual-output regulator with hiccup-mode short-circuit protection and soft-discharge shutdown. Use Value: Reverse OCP and automatic output discharge prevent backfeeding during module insertion/removal. |
Use Scenario: Portable instrumentation powered by single-cell Li-ion batteries with wide discharge profile (4.2V → 2.8V). IC Role / Device Role / Timing Role: Efficient step-down converter maintaining 3A output down to 2.85V input - extends runtime at low battery. Use Value: 1MHz switching enables use of small 1.5µH inductors and 2×22µF ceramic output caps - saves >25mm² PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL8036AIRZ | 2.5MHz fixed switching frequency; requires halved inductor values (e.g., 0.6µH vs 1.5µH) for same output ripple. | Better suited for ultra-compact designs where higher frequency enables smaller magnetics and faster transient response. | Select ISL8036AIRZ when board area is critical and input voltage remains ≥3.0V; avoid if input dips below 2.85V during operation. |
| TPS54360BQDDARQ1 | Single-channel 3.5A buck with 100V max input, no interleaving or current sharing; external MOSFETs required. | Targets automotive 12V/24V systems with high-voltage transients - not drop-in compatible for dual low-voltage POL use. | Choose TPS54360BQDDARQ1 only for high-input-voltage, single-rail applications requiring AEC-Q100 qualification - not a functional substitute for ISL8036IRZ. |
Compared with ISL8036AIRZ, the ISL8036IRZ offers lower switching losses at light loads due to its 1MHz frequency, while the TPS54360BQDDARQ1 lacks dual-channel integration and current-sharing capability - making ISL8036IRZ uniquely suitable for compact, dual-rail, low-input-voltage systems.
Availability
ISL8036IRZ is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/FPGA power supplies, and Li-ion–powered portable instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8036IRZ 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 product support, documentation, and manufacturing continuity for the ISL8036 family.
The ISL8036 series was designed specifically for high-efficiency, space-constrained point-of-load regulation in computing, communications, and portable electronics - emphasizing integration, thermal performance, and ease of use in dual-rail systems.
FAQ
What is the maximum input voltage rating for the ISL8036IRZ?
The ISL8036IRZ has an absolute maximum input voltage rating of 6.5V DC or 7V for durations up to 20ms. Its recommended operating input range is 2.85V to 6V, making it compatible with single Li⁺ cells (2.8–4.2V), three NiMH cells (~3.6V), or regulated 5V supplies. Exceeding 6.5V risks permanent damage to VIN, LX, and PGND pins.
Does the ISL8036IRZ support current-sharing mode, and what is required to enable it?
Yes, the ISL8036IRZ supports current-sharing mode to deliver up to 6A from a single output. To enable it, connect FB1 and FB2 together, tie COMP to an external RC network (not NC), configure SS for capacitor-based soft-start, and set R6 per Table 2 in the datasheet. This mode requires careful layout symmetry and matched inductor values to ensure balanced current division.
How does the ISL8036IRZ handle output short-circuit conditions?
The ISL8036IRZ employs hiccup-mode short-circuit protection: upon detecting overcurrent, it shuts down both channels for a recovery period, then attempts restart. This limits average power dissipation during sustained faults. Peak current limit thresholds are 4.1A to 5.5A per channel, with reverse OCP triggering at -1.5A to -3.5A - preventing damage from inductive flyback or backdrive events.
Can the ISL8036IRZ operate with only one channel enabled?
Yes, the ISL8036IRZ supports independent channel operation. Drive EN1 high and EN2 low (or vice versa) to activate only Channel 1 or Channel 2. The disabled channel enters soft-discharge mode, actively pulling its output to ground via an 80–120Ω internal resistor - ensuring clean rail collapse without floating nodes or unintended biasing.
What is the purpose of the exposed thermal pad (Pin 25) on the ISL8036IRZ QFN package?
The exposed thermal pad (Pin 25) on the ISL8036IRZ must be soldered to SGND for both electrical integrity and thermal performance. It serves as the primary heat conduction path from the die to the PCB. Renesas specifies connecting it with ≥6 thermal vias (0.3mm diameter) to an internal or bottom-layer copper plane - achieving θJA ≈ 36°C/W and enabling full 3A/channel operation at +85°C ambient.
ISL8036IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1 or 2
- Voltage - Input (Min):
- 2.85V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 3A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
ISL8036IRZ FAQ
1.How can I place an order for ISL8036IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8036IRZ 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 ISL8036IRZ reliable?
The price and inventory of ISL8036IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8036IRZ is usually 5 days.
3.What payment methods are accepted for ISL8036IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8036IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8036IRZ?
ISL8036IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8036IRZ 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 ISL8036IRZ?
For technical support, including ISL8036IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8036IRZ requirements.
6.How does Aetrix verify that ISL8036IRZ is sourced from the original manufacturer or authorized distributors?
All ISL8036IRZ 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 ISL8036IRZ meets industry standards.
7.What is the process for return or replacement of ISL8036IRZ?
All ISL8036IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8036IRZ, 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 ISL8036IRZ part is unused and in its original packaging.
Return procedure for ISL8036IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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