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Renesas ISL8036AIRZ-T
- Part No.:
- ISL8036AIRZ-T
- Manufacturer:
- Renesas
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ISL8036AIRZ-T.pdf
- Description:
- IC REG BUCK ADJ 3A SGL/DL 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,397
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Product details
Overview
ISL8036AIRZ-T from Renesas Electronics is a dual-channel, 3A per channel synchronous buck regulator with fixed 2.5MHz switching frequency, integrated high- and low-side MOSFETs, 0.8V reference, and 180° phase interleaving for reduced input RMS current and EMI. It operates from 2.85V to 6V input, delivers down to 0.8V output per channel, and supports both independent dual-output and 6A current-sharing modes - ideal for FPGA, microcontroller, and Li-ion-powered embedded systems.
For engineers reviewing the ISL8036AIRZ-T datasheet, ISL8036AIRZ-T pinout, ISL8036AIRZ-T application, or ISL8036AIRZ-T equivalent, key selection criteria include its 2.5MHz fixed-frequency operation (vs. 1MHz ISL8036), QFN-24 4mm×4mm package with exposed thermal pad, dual independent enable/PG pins, internal soft-start (1.5ms), and support for external synchronization up to 6MHz.
Technical Context
The ISL8036AIRZ-T implements current-mode PWM control with internal slope compensation and digital soft-start. Each channel features independent error amplifiers, peak current limiting, hiccup-mode short-circuit protection, reverse overcurrent protection, and thermal shutdown at 150°C with 25°C hysteresis.
Its 180° out-of-phase interleaved operation reduces input capacitor RMS current by ~30% versus single-phase designs and cuts output voltage ripple amplitude by half. The device supports both standalone dual-regulator use and parallel current-sharing mode via FB1–FB2 connection and external resistor network on COMP/SS pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | Fixed 2.5MHz - enables smaller inductors (e.g., 0.6µH vs. 1.5µH for 1MHz) and faster transient response. |
| Output Current per Channel | Guaranteed 3A continuous - supports high-current POL for core logic without derating at +85°C ambient. |
| Input Voltage Range | 2.85V to 6V - compatible with single Li⁺ cell (3.0–4.2V), three NiMH cells (~3.6V), or regulated 5V rails. |
| Feedback Reference Voltage | 0.8V ±10mV - sets precise output regulation down to 0.8V with 2% total accuracy over line/load/temperature. |
| Efficiency | Up to 95% at 3A - achieved via integrated 75mΩ P/N-channel MOSFETs and optimized gate drive, minimizing conduction and switching losses. |
| Soft-Start Time | 1.5ms (SS tied to VDD) - prevents inrush current during power-up; adjustable via external capacitor on SS pin. |
| Power-Good Delay | 1ms rising-edge delay - provides reliable sequencing signal after output reaches 92% of nominal voltage. |
Pinout & Package
ISL8036AIRZ-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 system ground for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX1, LX2 (Pins 18–19, 1–24) | Switching node outputs | Connect directly to inductor terminals; high dv/dt nodes requiring tight layout and Kelvin return paths. |
| PGND1, PGND2 (Pins 20–21, 22–23) | Power ground returns | Separate low-impedance return paths for each channel's high-side/lower-side MOSFETs to minimize noise coupling. |
| VIN1, VIN2 (Pins 16–17, 2–3) | Input supply inputs | Dual independent inputs allow separate input filtering per channel; each requires local 22µF ceramic decoupling to PGND. |
| EN1, EN2 (Pins 13, 4) | Channel enable controls | Active-high logic inputs; driving low discharges output capacitors via internal 100Ω switch - enables controlled shutdown. |
| PG1, PG2 (Pins 11, 5) | Power-good status outputs | Open-drain outputs with 1ms delay; pulled high externally to indicate stable regulation within ±8% window. |
| FB1, FB2 (Pins 9, 6) | Feedback inputs | Connect to resistor dividers setting output voltage; FB1 also monitors undervoltage and triggers PG logic. |
| SYNC (Pin 12) | External synchronization input | Negative-edge-triggered; accepts up to 6MHz clock to synchronize switching and reduce beat frequencies in multi-rail systems. |
| SS (Pin 14) | Soft-start timing control | Current-sourced node (5µA); capacitor value sets ramp time per Equation 1 - enables programmable startup slew rate. |
Key Features
| Feature | Design Value |
|---|---|
| 180° interleaved dual-channel operation | Reduces input capacitor RMS current by ~30% and cuts output ripple amplitude by 50%, easing EMI filter design. |
| Integrated P/N-channel MOSFETs | 75mΩ typical RDS(on) per FET pair - eliminates external power switches and reduces BOM count and layout area. |
| Independent enable and power-good per channel | Enables flexible power sequencing in multi-rail systems (e.g., core first, I/O second) without external logic. |
| Reverse overcurrent protection | Detects and limits negative current flow during light-load or dynamic load-dump conditions - prevents inductor saturation damage. |
| 100% duty-cycle capability | Supports <250mV dropout at 3A - allows operation near input rail, critical for battery-powered systems under low-VIN conditions. |
| Internal current-mode compensation | Eliminates need for external compensation components in standard dual-output configurations - simplifies design validation. |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Compact, high-density point-of-load converters on server CPU or GPU daughterboards. IC Role / Device Role / Timing Role: Dual 3A buck regulator delivering core (1.2V) and I/O (1.8V) voltages with interleaved switching. Use Value: 2.5MHz operation enables 0.6µH inductors and <1.5cm² total footprint - meets space-constrained board area targets. |
Use Scenario: Powering heterogeneous SoCs with multiple voltage domains (e.g., ARM core, DDR interface, PCIe PHY). IC Role / Device Role / Timing Role: Independent dual-channel regulator supporting staggered enable sequencing and per-rail PG monitoring. Use Value: 2% output accuracy and 1ms PG delay ensure reliable boot and runtime voltage compliance per JEDEC specifications. |
| Li-ion Battery Power Devices | Test and Measurement Systems |
Use Scenario: Portable oscilloscopes or handheld analyzers powered by single-cell Li-ion batteries (3.0–4.2V). IC Role / Device Role / Timing Role: Primary DC/DC converter generating 1.8V and 0.8V rails from varying battery voltage. Use Value: 2.85V minimum input and 100% duty cycle allow full utilization of battery discharge curve - extends runtime by >12%. |
Use Scenario: Precision bench instruments requiring ultra-low-noise, well-regulated analog and digital supplies. IC Role / Device Role / Timing Role: Dual-output regulator supplying clean 3.3V (digital) and 1.2V (analog PLL) with phase-interleaved ripple cancellation. Use Value: 180° phase shift reduces 2.5MHz fundamental ripple amplitude by 50% - lowers post-regulation filtering requirements. |
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 |
|---|---|---|---|
| ISL8036IRZ-T | Fixed 1MHz switching frequency; requires larger inductors (1.5µH vs. 0.6µH) and exhibits higher output ripple at same load. | Better suited for cost-sensitive, lower-frequency designs where EMI filtering is less constrained and board space is less critical. | Select ISL8036IRZ-T when 1MHz operation simplifies EMI compliance testing or when legacy 1.5µH inductors are already qualified. |
| TPS543B20RTWR | 3.5A per channel, 2.2MHz adjustable frequency, integrated LDO for bias rail, but no reverse OCP or dedicated soft-discharge. | Targets higher-current applications needing >3A/channel and includes integrated LDO for auxiliary bias - adds complexity for simple dual-buck use. | Choose TPS543B20RTWR only if 3.5A rating, adjustable frequency, or integrated LDO functionality is required - not a drop-in replacement. |
Compared with ISL8036IRZ-T, the ISL8036AIRZ-T delivers tighter output ripple and smaller magnetics due to its 2.5MHz operation, while TPS543B20RTWR offers higher current headroom and integrated bias but lacks reverse OCP and soft-discharge - making ISL8036AIRZ-T optimal for compact, battery-powered dual-rail systems demanding robust fault protection.
Availability
ISL8036AIRZ-T is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/FPGA power delivery, and Li-ion battery-powered devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8036AIRZ-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 is a global semiconductor leader delivering high-performance analog, power, and embedded processing solutions for automotive, industrial, and infrastructure markets.
The ISL8036AIRZ-T belongs to Renesas' high-efficiency synchronous buck regulator product line, designed specifically for space-constrained, high-current point-of-load applications in portable and embedded systems requiring precision regulation and robust protection.
FAQ
What is the switching frequency of the ISL8036AIRZ-T, and can it be adjusted?
The ISL8036AIRZ-T has a fixed internal switching frequency of 2.5MHz and does not support frequency adjustment via external resistor or capacitor. However, it accepts an external synchronization signal up to 6MHz on the SYNC pin, allowing system-level clock alignment - useful in multi-rail designs to avoid beat frequencies. This differs from the ISL8036IRZ-T, which runs at a fixed 1MHz.
Does the ISL8036AIRZ-T support current sharing between channels to deliver 6A?
Yes, the ISL8036AIRZ-T supports current sharing mode to combine both channels into a single 6A output. This requires connecting FB1 to FB2, configuring external resistors per Table 2 in the datasheet, and using the COMP pin for loop compensation. In this mode, interleaved PWM reduces input/output ripple and improves thermal distribution across the IC and PCB.
How does the soft-start function work on the ISL8036AIRZ-T?
The ISL8036AIRZ-T implements digital soft-start with a fixed 1.5ms ramp time when the SS pin is tied to VDD. For adjustable timing, connect a capacitor from SS to SGND; the ramp duration follows tSS = 6.25 × CSS (in µs), with CSS ≤ 33nF. This controlled voltage ramp prevents inrush current and ensures monotonic output rise - critical for powering sensitive logic without reset glitches.
What protection features does the ISL8036AIRZ-T include?
The ISL8036AIRZ-T integrates peak current limiting, hiccup-mode short-circuit protection, reverse overcurrent protection, thermal shutdown at 150°C (with 25°C hysteresis), undervoltage lockout (2.85V), and soft-discharge during shutdown. When EN1 or EN2 is pulled low, the internal 100Ω switch actively discharges the output capacitor - preventing floating voltages and enabling safe hot-swap operation.
Can the ISL8036AIRZ-T operate with a single Li-ion cell input?
Yes, the ISL8036AIRZ-T supports input voltages from 2.85V to 6V, making it fully compatible with single Li-ion cells (nominal 3.7V, range 3.0–4.2V). Its 100% duty-cycle capability ensures regulation down to <250mV dropout at 3A, maximizing usable battery capacity - especially beneficial during end-of-discharge when cell voltage drops below 3.2V.
ISL8036AIRZ-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:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
ISL8036AIRZ-T FAQ
1.How can I place an order for ISL8036AIRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8036AIRZ-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 ISL8036AIRZ-T reliable?
The price and inventory of ISL8036AIRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8036AIRZ-T is usually 5 days.
3.What payment methods are accepted for ISL8036AIRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8036AIRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8036AIRZ-T?
ISL8036AIRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8036AIRZ-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 ISL8036AIRZ-T?
For technical support, including ISL8036AIRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8036AIRZ-T requirements.
6.How does Aetrix verify that ISL8036AIRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8036AIRZ-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 ISL8036AIRZ-T meets industry standards.
7.What is the process for return or replacement of ISL8036AIRZ-T?
All ISL8036AIRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8036AIRZ-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 ISL8036AIRZ-T part is unused and in its original packaging.
Return procedure for ISL8036AIRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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