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Renesas ISL8036AIRZ
- Part No.:
- ISL8036AIRZ
- Manufacturer:
- Renesas
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ISL8036AIRZ.pdf
- Description:
- IC REG BUCK ADJ 3A SGL/DL 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,795
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Product details
Overview
ISL8036AIRZ from Renesas Electronics is a dual-channel synchronous buck regulator IC with integrated 3A P- and N-channel MOSFETs per channel, fixed 2.5MHz switching frequency, 0.8V to 3.3V output voltage range, ±2% output accuracy over load/line/temperature, and 180° out-of-phase operation for reduced input RMS current and EMI. It powers µC/FPGA core rails in space-constrained Li-ion–powered embedded systems.
For engineers reviewing the ISL8036AIRZ datasheet, ISL8036AIRZ pinout, ISL8036AIRZ application, or ISL8036AIRZ equivalent, key selection criteria include its 2.5MHz fixed-frequency operation (vs. 1MHz ISL8036), 24-pin 4mm×4mm QFN package with exposed thermal pad, dual 3A or interleaved 6A current-sharing capability, and support for single-cell Li+ (2.85V–6V) input.
Technical Context
The ISL8036AIRZ implements current-mode PWM control with internal digital soft-start (1.5ms), independent 1ms power-good timers per channel, and reverse overcurrent protection. Its two channels operate 180° out-of-phase using separate error amplifiers, COMP pins, and FB inputs-enabling either independent dual-output or synchronized current-sharing modes.
It features internal slope compensation, peak current limiting with hiccup-mode short-circuit protection, thermal shutdown at 150°C with 25°C hysteresis, and soft-discharge functionality during shutdown via 100Ω internal discharge resistor. The device supports external synchronization up to 6MHz and 100% duty-cycle operation for <250mV dropout at 3A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | Fixed 2.5MHz - enables smaller external inductors (e.g., 0.6µH vs. 1.5µH for 1MHz) and reduces output ripple without increasing EMI risk due to interleaving. |
| Output Current per Channel | Guaranteed 3A - supports high-current core rails for modern FPGAs and microcontrollers without external current-sense resistors. |
| Input Voltage Range | 2.85V to 6V - compatible with single Li+ cell, three NiMH cells, or regulated 5V supplies; includes 2.5V UVLO with 100mV hysteresis. |
| Feedback Reference Voltage | 0.800V ±10mV - sets precise output voltage via external resistor divider; enables 0.8V minimum output for low-voltage logic domains. |
| Efficiency | Up to 95% at 3A - achieved via low RDS(on) internal P/N-MOSFETs (75mΩ typical each at 6V) and optimized gate drive. |
| Power-Good Delay | 1ms rising-edge delay - provides reliable system sequencing confirmation after startup; falling-edge delay is 7–10µs. |
| Thermal Resistance | θJA = 36°C/W - requires proper PCB thermal vias under 25-pad for sustained 3A/channel operation at +85°C ambient. |
Pinout & Package
ISL8036AIRZ is housed in a thermally enhanced 24-lead 4mm × 4mm QFN package (L24.4x4D) with 1mm max height and an exposed thermal 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; handle high di/dt switching waveforms; require 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 power stage to minimize noise coupling and improve stability. |
| VIN1, VIN2 (Pins 16–17, 2–3) | Input supply inputs | Each channel has dedicated input pins; decoupling capacitors (22µF ceramic) must be placed close to respective VIN/PGND pairs. |
| FB1, FB2 (Pins 9, 6) | Feedback inputs | High-impedance (0.1µA bias) inputs for resistor-divider networks; used independently in dual mode or tied together in current-sharing mode. |
| EN1, EN2 (Pins 13, 4) | Channel enable inputs | Active-high logic enables; pulling low discharges output capacitor via internal 100Ω resistor for safe shutdown. |
| PG1, PG2 (Pins 11, 5) | Power-good open-drain outputs | Indicate regulation status with 1ms delay; require external pull-up to VDD or system rail for proper logic-level signaling. |
| SYNC (Pin 12) | External synchronization input | Negative-edge-triggered; accepts up to 6MHz clock; when unconnected, defaults to internal 2.5MHz oscillator. |
| SS (Pin 14) | Soft-start timing control | Connected to VIN for fixed 1.5ms ramp; connected to external capacitor for adjustable timing (tSS = 6.25·CSS µs). |
| COMP (Pin 7) | Compensation network connection | Used only in current-sharing mode for external loop compensation; NC in standard dual-output configuration. |
| VDD (Pin 15) | Logic supply input | Must be biased within VIN +0.3V/−0.5V; powers internal logic, drivers, and error amplifiers. |
| SGND (Pin 10) | System ground reference | Analog ground reference for FB, COMP, SS, and PG; must be star-connected to PGND at single point near IC. |
| NC (Pin 8) | No-connect terminal | Internally unused; must be tied to SGND for mechanical stability and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N-MOSFETs | Eliminates external power switches and reduces BOM count; 75mΩ typical RDS(on) per FET enables >95% efficiency at 3A. |
| 180° Interleaved Operation | Halves input capacitor RMS current and reduces output voltage ripple by √2 compared to single-phase operation. |
| Current-Sharing Mode | Combines both channels into a single 6A output with interleaved PWM, reducing thermal stress and enabling compact POL modules. |
| Internal Digital Soft-Start | 1.5ms fixed ramp time prevents inrush current; eliminates need for external timing components in most applications. |
| Reverse Overcurrent Protection | Detects negative inductor current (−2.5A typical) to prevent shoot-through and ensure safe discontinuous conduction mode transitions. |
| Thermal Shutdown with Hysteresis | Shuts down at 150°C junction temperature and re-enables only after cooling to 125°C, preventing thermal cycling failures. |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Compact point-of-load converters on server motherboard VRMs delivering 1.8V/3A to FPGA I/O banks and 0.8V/3A to core logic. IC Role / Device Role / Timing Role: Dual-output synchronous buck controller managing independent voltage domains with phase interleaving to reduce input capacitance requirements. Use Value: Enables 40% smaller total solution size vs. discrete controllers while maintaining <2% output regulation across −40°C to +85°C. | Use Scenario: Powering ARM-based microcontrollers in battery-operated industrial sensors requiring ultra-low quiescent current and fast transient response. IC Role / Device Role / Timing Role: Primary DC/DC regulator converting single Li+ cell (3.0–4.2V) to stable 1.2V core and 3.3V I/O rails with independent enable control. Use Value: Achieves 92% efficiency at 100mA load and supports dynamic voltage scaling via EN pin sequencing without external supervisors. |
| Plug-in DC/DC Modules for Routers and Switchers | Li-ion Battery Power Devices |
Use Scenario: Hot-pluggable 6A power modules in enterprise networking equipment where board space is constrained and thermal management is critical. IC Role / Device Role / Timing Role: Interleaved 6A current-sharing buck controller operating at 2.5MHz to fit within 1.5cm² footprint while meeting EN55022 Class B EMI limits. Use Value: Reduces required input bulk capacitance by 50% and lowers peak input current harmonics, simplifying EMI filter design. | Use Scenario: Portable medical devices powered by 3.7V Li-ion batteries needing dual regulated outputs for analog front-end (2.5V) and digital subsystem (1.8V). IC Role / Device Role / Timing Role: Dual-channel buck regulator supporting independent soft-start and power-good sequencing to meet IEC 62304 safety startup requirements. Use Value: Guarantees 1ms PG assertion with ±2% output accuracy across full battery discharge curve (4.2V → 2.85V), eliminating need for post-regulation LDOs. |
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 | 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 stringent and board area is not constrained. | Select ISL8036IRZ when 1MHz operation simplifies EMI compliance or when legacy 1.5µH inductors are already qualified. |
| TPS543B20RTWR | 3.5A per channel, 2.2MHz programmable frequency, integrated MOSFETs, but lacks true 180° interleaving and uses single FB pin for both channels. | Designed for high-density server POLs with PMBus interface; requires external compensation and offers telemetry not present in ISL8036AIRZ. | Choose TPS543B20RTWR when digital monitoring, margining, or adaptive frequency tuning is required-otherwise ISL8036AIRZ delivers simpler analog control with superior phase control. |
Compared with ISL8036IRZ, the ISL8036AIRZ delivers higher switching frequency for smaller magnetics and lower output ripple, while TPS543B20RTWR adds digital configurability at the cost of increased design complexity and loss of independent channel control.
Availability
ISL8036AIRZ is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/FPGA power delivery, and Li-ion–powered portable electronics requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8036AIRZ 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 specializing in microcontrollers, analog power management, and timing solutions for industrial, automotive, and infrastructure markets.
The ISL8036AIRZ belongs to Renesas' high-efficiency synchronous buck regulator product line, designed specifically for space-constrained, high-current point-of-load applications in battery-powered and embedded systems.
FAQ
What is the maximum output current supported by the ISL8036AIRZ in dual-channel mode?
The ISL8036AIRZ guarantees 3A output current per channel in independent dual-channel operation. Each channel maintains this rating across the full input voltage range (2.85V–6V), ambient temperature (−40°C to +85°C), and output voltage range (0.8V–3.3V), with internal MOSFETs rated for continuous 3A conduction and peak current limiting set at 4.8A typical.
Does the ISL8036AIRZ support external synchronization, and what is its maximum sync frequency?
Yes, the ISL8036AIRZ supports external synchronization via the SYNC pin (Pin 12), which accepts a negative-edge-triggered clock signal up to 6MHz. When synchronized, each channel operates at half the input frequency (e.g., 3MHz sync yields 1.5MHz per channel), preserving the 180° phase relationship. This feature allows EMI reduction through frequency dithering or alignment with system clocks.
How does the ISL8036AIRZ implement current sharing between its two channels?
The ISL8036AIRZ achieves current sharing by connecting FB1 and FB2 together and configuring both channels in parallel with matched inductors and output capacitors. The internal error amplifiers balance current automatically via the shared feedback node, while interleaved 180° PWM reduces input/output ripple. External R/C compensation on the COMP pin is required to stabilize the combined control loop in this mode.
What is the purpose of the SS pin on the ISL8036AIRZ, and how is it configured for different soft-start times?
The SS pin (Pin 14) controls the soft-start ramp time. When tied directly to VIN, it provides a fixed 1.5ms soft-start interval. For adjustable timing, a capacitor (CSS) is connected from SS to SGND, yielding tSS = 6.25·CSS µs (e.g., 10nF gives 62.5µs). CSS must not exceed 33nF to avoid instability, and the pin must never be left floating.
Can the ISL8036AIRZ operate with a single Li+ cell input, and what is its minimum input voltage?
Yes, the ISL8036AIRZ is explicitly designed for single Li+ cell operation, with a minimum input voltage of 2.85V (typical UVLO rising threshold). Its 100% duty-cycle capability ensures regulation down to <250mV dropout at 3A, allowing stable 0.8V output even as the battery discharges to 2.85V-critical for maximizing runtime in portable devices.
ISL8036AIRZ 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:
- 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 FAQ
1.How can I place an order for ISL8036AIRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8036AIRZ 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 reliable?
The price and inventory of ISL8036AIRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8036AIRZ is usually 5 days.
3.What payment methods are accepted for ISL8036AIRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8036AIRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8036AIRZ?
ISL8036AIRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8036AIRZ 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?
For technical support, including ISL8036AIRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8036AIRZ requirements.
6.How does Aetrix verify that ISL8036AIRZ is sourced from the original manufacturer or authorized distributors?
All ISL8036AIRZ 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 meets industry standards.
7.What is the process for return or replacement of ISL8036AIRZ?
All ISL8036AIRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8036AIRZ, 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 part is unused and in its original packaging.
Return procedure for ISL8036AIRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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