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Renesas ISL8036IRZ-T
- Part No.:
- ISL8036IRZ-T
- Manufacturer:
- Renesas
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ISL8036IRZ-T.pdf
- Description:
- IC REG BUCK ADJ 3A SGL/DL 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,885
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Product details
Overview
ISL8036IRZ-T from Renesas Electronics (formerly Intersil) is a dual-channel synchronous buck regulator IC with integrated 3A P/N-channel MOSFETs per channel, fixed 1MHz switching frequency, and 180° interleaved phase operation. It delivers up to 3A per channel or 6A in current-sharing mode, supports 2.85V–6V input, regulates down to 0.8V output, and achieves up to 95% efficiency at 3A load. It is used in point-of-load power for microcontrollers, FPGAs, and Li-ion battery-powered devices.
For engineers reviewing the ISL8036IRZ-T datasheet, ISL8036IRZ-T pinout, ISL8036IRZ-T application, or ISL8036IRZ-T equivalent, key selection considerations include its dual 3A capability with interleaved PWM, internal digital soft-start (1.5ms), independent power-good timers (1ms delay), reverse overcurrent protection, and QFN-24 4mm×4mm package with exposed thermal pad.
Technical Context
The ISL8036IRZ-T implements a current-mode PWM control architecture with internal slope compensation and transconductance error amplifiers referenced to a 0.8V feedback threshold. Each channel features independent enable, power-good, and soft-start logic, with 180° phase offset reducing input RMS current and EMI.
It supports external synchronization up to 6MHz (with halved channel frequency), includes hiccup-mode short-circuit protection, thermal shutdown at 150°C with 25°C hysteresis, and active output capacitor discharge during shutdown via 100Ω internal soft-discharge resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current (per channel) | Guaranteed 3A continuous; enables compact dual-rail or 6A current-sharing POL designs without external current-sense resistors. |
| Switching Frequency | Fixed 1MHz (not adjustable); allows smaller external inductors (e.g., 1.0–3.3µH) and reduces switching loss vs. higher-frequency variants. |
| Input Voltage Range | 2.85V to 6V DC; compatible with single Li+ cell (3.0–4.2V), three NiMH cells (~3.6V), or regulated 5V rails. |
| Output Voltage Range | 0.8V to 3.3V (set by external resistor divider); 2% regulation accuracy over line/load/temperature ensures stable core voltage for µC/FPGA. |
| Efficiency | Up to 95% at 3A/1.8VOUT with 3.3VIN; achieved via low RDS(on) internal MOSFETs (75mΩ P-ch / 75mΩ N-ch @ 6V). |
| Soft-Start Time | 1.5ms (internal digital soft-start when SS tied to VDD); prevents inrush current and stabilizes startup sequencing in multi-rail systems. |
| Power-Good Delay | 1ms fixed delay on PG1/PG2; provides reliable system reset timing after output reaches regulation, critical for processor boot integrity. |
Pinout & Package
ISL8036IRZ-T is housed in a thermally enhanced 24-lead QFN package (4mm × 4mm, 1mm max height) with an exposed metal pad (Pin 25) that must be soldered to SGND for electrical integrity and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX1, LX2 (Pins 18–19, 1–24) | Switch node outputs | Connect directly to inductor terminals; high dv/dt nodes requiring tight layout and Kelvin grounding to minimize noise coupling. |
| VIN1/VIN2 (Pins 16–17, 2–3) | Channel input supplies | Accept 2.85–6V; each requires local 22µF ceramic decoupling to PGND to suppress high-frequency ripple. |
| EN1/EN2 (Pins 13, 4) | Independent enable inputs | Active-high logic; drives output into soft-discharge shutdown (100Ω pull-down) when low-enables precise power sequencing. |
| PG1/PG2 (Pins 11, 5) | Power-good status outputs | Open-drain signals with 1ms delay; assert high only after output settles within ±8% of target-used for system enable gating. |
| FB1/FB2 (Pins 9, 6) | Feedback inputs | Reference 0.8V internal error amplifier; connect resistor dividers to set output voltage; FB1 also monitors undervoltage lockout. |
| SYNC (Pin 12) | External synchronization input | Negative-edge-triggered; accepts up to 6MHz clock; forces both channels to half that frequency with 180° phase alignment. |
| SS (Pin 14) | Soft-start timing control | Tied to VDD for fixed 1.5ms ramp; connects to external capacitor for adjustable soft-start in current-sharing mode. |
| COMP (Pin 7) | Compensation network node | Used only in current-sharing mode; requires external R-C network for loop stability when operating as 6A single output. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual 3A synchronous buck stages | Eliminates need for 4 external MOSFETs and associated gate drivers-reduces BOM count and PCB area by >40% vs discrete solutions. |
| 180° interleaved phase operation | Halves input ripple current amplitude and reduces required input capacitance by ~75%, easing EMI filter design. |
| Current sharing mode (6A total) | Enables single high-current rail using identical components; interleaved PWM minimizes output ripple and improves transient response. |
| Reverse overcurrent protection | Detects negative inductor current (down to –2.5A) and disables switching-prevents shoot-through and inductor saturation during light-load DCM. |
| Internal digital soft-start (1.5ms) | Prevents output overshoot and inrush stress on downstream capacitors; eliminates need for external soft-start circuitry or timing components. |
| 100% duty-cycle capability | Supports <250mV dropout at 3A-enables ultra-low-voltage operation (e.g., 0.8V out from 1.05V input) in battery-critical applications. |
Applications
| Microcontroller Core Power | FPGA I/O Bank Supply |
|---|---|
|
Use Scenario: Providing tightly regulated 1.2V/1.8V core voltage to ARM Cortex-M7 or RISC-V SoCs in industrial edge controllers. IC Role / Device Role / Timing Role: Dual-channel buck regulator delivering independent, sequenced 3A rails with 1ms PG assertion for deterministic boot. Use Value: 2% output accuracy and 180° interleaving ensure stable core voltage under dynamic load steps, preventing CPU lockup or timing violations. |
Use Scenario: Powering multiple FPGA I/O banks (e.g., 1.8V, 2.5V, 3.3V) in telecom line cards requiring low-noise, fast-transient response. IC Role / Device Role / Timing Role: Configured in dual-output mode with separate feedback dividers; PG1/PG2 coordinate bank enable sequencing. Use Value: Independent EN/PG pins allow staggered power-up across voltage domains, meeting Xilinx/Intel FPGA power sequencing requirements. |
| Li-ion Portable Instrumentation | DC/DC POL Module |
|
Use Scenario: Generating 0.8V–3.3V rails from a single-cell Li-ion battery (2.8–4.2V) in handheld test equipment with strict quiescent current limits. IC Role / Device Role / Timing Role: High-efficiency synchronous buck with 8µA shutdown current and soft-discharge shutdown preserves battery charge during sleep. Use Value: 95% peak efficiency at 3A and 100% duty cycle extend runtime in battery-critical applications where input voltage drops near end-of-life. |
Use Scenario: Embedded in compact 12mm×12mm DC/DC POL modules for server memory subsystems requiring 6A at 1.2V. IC Role / Device Role / Timing Role: Operated in current-sharing mode with external COMP network; SYNC input synchronized to system clock for EMI reduction. Use Value: Interleaved 6A output cuts output ripple by 50% vs single-phase, relaxing capacitor selection and improving signal integrity on memory buses. |
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-T | Fixed 2.5MHz switching frequency; requires smaller inductors (e.g., 0.6µH vs 1.5µH) but increases switching loss at high load. | Better suited for space-constrained designs needing minimal inductor footprint; less optimal for high-efficiency 3A loads at 1.8VOUT. | Select ISL8036AIRZ-T only when board area is primary constraint and efficiency above 2A is secondary. |
| TPS54360BDRCT | Single-channel 3.5A buck with adjustable frequency (100kHz–2.5MHz); no integrated current sharing or dual-channel PG outputs. | Requires two ICs to match dual 3A functionality; lacks interleaving, independent EN/PG, and reverse OCP-increases BOM and layout complexity. | Choose TPS54360BDRCT only if design requires programmable frequency or needs to avoid Renesas-specific support ecosystem. |
Compared with ISL8036AIRZ-T and TPS54360BDRCT, the ISL8036IRZ-T uniquely delivers guaranteed dual 3A operation with hardware-enforced 180° interleaving, independent power sequencing controls, and reverse overcurrent protection-making it optimal for space- and reliability-sensitive dual-rail POL systems.
Availability
ISL8036IRZ-T is available at Aetrix Electronics and suitable for microcontroller core power, FPGA I/O supply, and Li-ion portable instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8036IRZ-T 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 Corporation acquired Intersil in 2017 and maintains full technical and manufacturing continuity for the ISL8036 family. Renesas is a global leader in microcontrollers, analog, and power management ICs with ISO 9001-certified fabrication and assembly facilities.
The ISL8036IRZ-T belongs to Renesas' high-efficiency synchronous buck regulator product line, designed specifically for low-voltage, high-current point-of-load applications in computing, industrial automation, and battery-powered electronics.
FAQ
What is the maximum output current per channel for the ISL8036IRZ-T?
The ISL8036IRZ-T guarantees 3A continuous output current per channel under recommended operating conditions (TA = –40°C to +85°C, VIN = 2.85V–6V). In current-sharing mode, both channels combine to deliver up to 6A with interleaved PWM, reducing output ripple and improving thermal distribution. The datasheet specifies this rating with 1.5µH inductors and proper thermal layout using the exposed pad.
Does the ISL8036IRZ-T support external frequency synchronization?
Yes, the ISL8036IRZ-T supports external synchronization via the SYNC pin (Pin 12), which accepts negative-edge-triggered clock signals up to 6MHz. When synchronized, each channel operates at half the input frequency (e.g., 3MHz sync → 1.5MHz per channel) while maintaining 180° phase alignment. This feature enables EMI reduction through frequency dithering or alignment with system clocks.
How does the ISL8036IRZ-T handle shutdown and output discharge?
When EN1 or EN2 is driven low, the ISL8036IRZ-T activates internal 100Ω soft-discharge resistors between VOUT and PGND, safely discharging output capacitors without external components. This prevents floating voltages and ensures clean power-down sequencing. The discharge path is active only during shutdown and does not affect normal operation or efficiency.
What is the purpose of the COMP pin on the ISL8036IRZ-T?
The COMP pin (Pin 7) is used exclusively in current-sharing (6A) mode to connect an external RC compensation network that stabilizes the combined control loop. In standard dual-output mode, COMP is internally compensated and left unconnected (NC). Its function is not required for independent 3A channel operation-only when paralleling outputs for higher current with shared feedback.
Can the ISL8036IRZ-T operate with a 2.8V input supply?
No-the ISL8036IRZ-T has a minimum recommended input voltage of 2.85V, with an absolute minimum UVLO threshold of 2.5V (rising). Operation below 2.85V risks instability, reduced output current capability, or failure to regulate-especially at high load or elevated temperature. For true 2.8V operation, consider the ISL8036A variant or alternative regulators with lower UVLO.
ISL8036IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for ISL8036IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8036IRZ-T 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-T reliable?
The price and inventory of ISL8036IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8036IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL8036IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8036IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8036IRZ-T?
ISL8036IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8036IRZ-T 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-T?
For technical support, including ISL8036IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8036IRZ-T requirements.
6.How does Aetrix verify that ISL8036IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8036IRZ-T 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-T meets industry standards.
7.What is the process for return or replacement of ISL8036IRZ-T?
All ISL8036IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8036IRZ-T, 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-T part is unused and in its original packaging.
Return procedure for ISL8036IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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