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Renesas ISL78236ARZ-T7A
- Part No.:
- ISL78236ARZ-T7A
- Manufacturer:
- Renesas
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ISL78236ARZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 3A DL 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,716
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Product details
Overview
ISL78236ARZ-T7A from Renesas (formerly Intersil) is a dual-channel, 3A/3A synchronous buck regulator with integrated P/N-channel MOSFETs, operating at 2.5MHz fixed frequency and supporting 2.8V–6V input. It delivers up to 95% efficiency, 2% reference accuracy over temperature, and enables current sharing for 6A single-output operation in automotive point-of-load applications such as infotainment power supplies.
For engineers reviewing the ISL78236ARZ-T7A datasheet, ISL78236ARZ-T7A pinout, ISL78236ARZ-T7A application, or ISL78236ARZ-T7A equivalent, key selection criteria include its AEC-Q100 qualification, 180° out-of-phase dual-channel operation for EMI reduction, 100% duty cycle capability down to <250mV dropout, and support for internal/external loop compensation in both dual-output and current-sharing modes.
Technical Context
The ISL78236ARZ-T7A implements peak-current-mode PWM control per channel with independent transconductance error amplifiers, slope compensation, and dynamic current limiting. Its 180° phase shift between LX1 and LX2 reduces input RMS current and conducted EMI, while the 2.5MHz switching frequency enables compact 0.6µH inductors and low-ESR ceramic output capacitors.
It supports three operational modes: independent dual 3A outputs, parallel 6A current-sharing mode with external RC network on COMP, and synchronized operation via SYNC pin (6–8MHz external clock). Protection includes reverse overcurrent detection, hiccup-mode short-circuit response, thermal shutdown at 150°C, and soft-discharge during enable-low shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.85V to 6V - supports single Li+ cell, 3×NiMH, or regulated 3V/5V bus without pre-regulation. |
| Output Current per Channel | 0A to 3A - each channel delivers full 3A continuously across -40°C to +105°C ambient. |
| Switching Frequency | 2.15–2.85MHz (typ. 2.5MHz) - enables small passive components and high transient response. |
| Reference Voltage Accuracy | ±2% over -40°C to +105°C - ensures stable output regulation under automotive thermal stress. |
| Efficiency | Up to 95% at 3A - achieved via integrated 70–100mΩ P/N-MOSFETs and synchronous rectification. |
| Duty Cycle Range | 0% to 100% - maintains regulation even as input drops below output (e.g., battery sag), limiting dropout to <250mV at 3A. |
| Power-Good Delay | 1ms rising-edge delay - provides reliable sequencing signal after output reaches 88–95% of nominal voltage. |
Pinout & Package
ISL78236ARZ-T7A is housed in a thermally enhanced 24-lead 4mm × 4mm QFN package with 1mm max height and exposed thermal pad (connected to SGND). The layout supports high-current paths via dual PGND1/PGND2 and LX1/LX2 pins, and integrates system-level functions including EN/PG/SS/SYNC/COMP/FB pins for flexible configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX1, LX2 | Switching node (Ch1/Ch2) | High-frequency drain connections to internal P/N-MOSFETs; require low-inductance routing to minimize EMI and ringing. |
| PGND1, PGND2 | Power ground (Ch1/Ch2) | Separate return paths for high-current power stages; must be connected to local PGND copper islands before joining SGND. |
| EN1, EN2 | Channel enable inputs | Independent logic-level controls for power sequencing; drive low to shut down channel and activate soft-discharge (RDIS ≈ 100Ω). |
| PG1, PG2 | Power-good indicators | Active-high open-drain outputs with 1ms delay; assert when FB voltage reaches 88–95% of VFB = 0.8V. |
| FB1, FB2 | Feedback inputs | Negative inputs to transconductance error amplifiers; set output voltage via resistor divider (e.g., R2/R3 = 124k/100k for 1.8V). |
| SYNC | External synchronization input | Negative-edge-triggered; accepts 6–8MHz clock to force PWM mode and align switching phases across multiple ICs. |
| COMP | Compensation node | No-connect in dual-output mode; requires external RC network (e.g., 10kΩ + 1nF) for stable loop in current-sharing mode. |
| SS | Soft-start timing control | Internal 5µA current source charges external capacitor (CSS ≤ 33nF); tSS = 6.25·CSS (µF) seconds. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3A/3A independent outputs | Enables separate power domains for FPGA core/I/O rails or DSP + memory subsystems with independent enable/PG control. |
| 180° out-of-phase operation | Reduces input ripple current by ~70% vs. in-phase dual converters, lowering bulk capacitor RMS stress and EMI filter size. |
| Reverse overcurrent protection | Detects negative current flow (e.g., during load dump or output short) with Inoc = –1.5 to –3.5A thresholds per channel. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use across –40°C to +105°C junction temperature, including ESD (4kV HBM), latch-up (100mA), and thermal cycling. |
| 100% duty cycle capability | Maintains regulation when VIN approaches VOUT (e.g., 3.3V input → 1.8V output), extending battery runtime in portable automotive systems. |
Applications
| Infotainment System Power | FPGA Core & I/O Supply |
|---|---|
|
Use Scenario: Powering display processor, audio codec, and connectivity modules in automotive head units. IC Role / Device Role / Timing Role: Dual-output buck regulator delivering 1.2V/3A (core) and 1.8V/3A (I/O) from 5V bus. Use Value: 2.5MHz operation minimizes inductor size (<1.1µH), while 180° phase shift reduces input capacitor requirements by 50%. |
Use Scenario: Providing tightly regulated, sequenced voltages to Xilinx/Intel FPGA banks requiring independent core and auxiliary rails. IC Role / Device Role / Timing Role: Dual-channel PMIC with independent EN1/EN2 and PG1/PG2 for controlled power-up/down sequencing. Use Value: ±2% reference accuracy and 1mV/A load regulation ensure stable operation across temperature and load transients. |
| Automotive ADAS Camera Module | Telematics Control Unit (TCU) |
|
Use Scenario: Generating 1.8V/3A for image sensor ISP and 3.3V/3A for MIPI interface in rear-view camera ECU. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with AEC-Q100 qualification for safety-critical vision systems. Use Value: Thermal shutdown at 150°C and hiccup-mode OCP prevent thermal runaway during sustained overload conditions. |
Use Scenario: Supplying 1.2V/3A to cellular modem SoC and 1.5V/3A to GNSS receiver in vehicle-to-cloud communication module. IC Role / Device Role / Timing Role: Dual-output regulator supporting current sharing (6A) for high-power LTE/5G baseband processing. Use Value: COMP-pin configurable loop compensation enables stable 6A operation with <5% current imbalance across channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4436GL-AEC1-Z | Single 6A channel (not dual 3A), 2.2MHz, 4.5–60V input, no current sharing mode. | Suitable for higher-input automotive systems (e.g., 12V battery rail), but lacks independent dual-rail flexibility. | Select when input exceeds 6V or only one high-current rail is needed; not drop-in for ISL78236ARZ-T7A's dual-channel footprint. |
| TPS544B20RTWR | Single 4A channel, 4.5–18V input, 500kHz–2MHz programmable frequency, no AEC-Q100 rating. | Targeted at industrial/commercial servers; lacks automotive qualification and 180° phase-shift EMI benefit. | Consider for non-automotive designs requiring wider input range and digital interface; requires redesign for thermal and reliability validation. |
Compared with MPQ4436GL-AEC1-Z and TPS544B20RTWR, the ISL78236ARZ-T7A uniquely combines AEC-Q100 qualification, true dual 3A independence, 180° phase shift for EMI reduction, and seamless transition to 6A current sharing - making it optimal for space-constrained automotive SoC power delivery where rail separation and thermal management are critical.
Availability
ISL78236ARZ-T7A is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and telematics control units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for ISL78236ARZ-T7A 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 continues to develop and support its high-reliability analog and power management portfolio for automotive and industrial markets.
The ISL78236ARZ-T7A belongs to Renesas' ISL78xxx automotive power management family, designed specifically for demanding point-of-load DC/DC conversion in engine control, infotainment, and ADAS systems operating across –40°C to +105°C.
FAQ
What is the maximum continuous output current per channel for the ISL78236ARZ-T7A?
The ISL78236ARZ-T7A delivers up to 3A continuous output current per channel across the full automotive temperature range (–40°C to +105°C), verified under recommended operating conditions with proper PCB thermal design and 2×22µF output capacitance per channel. Derating applies above +85°C ambient depending on airflow and copper area.
Does the ISL78236ARZ-T7A support external synchronization, and what is its acceptable frequency range?
Yes, the ISL78236ARZ-T7A supports external synchronization via the SYNC pin, which accepts a negative-edge-triggered clock signal from 6MHz to 8MHz. At this input frequency, each channel operates at half the SYNC rate (e.g., 3–4MHz), enabling precise timing alignment across multiple converters in multi-rail systems.
How does the ISL78236ARZ-T7A implement current sharing between its two channels?
The ISL78236ARZ-T7A achieves current sharing by connecting the COMP pins of both channels and adding an external RC network (e.g., 10kΩ + 1nF) between COMP and SGND. This configures the error amplifiers in parallel mode, balancing output currents to within ±5% across 0–6A total load, as confirmed in Figure 46 of the datasheet.
What protection features are integrated into the ISL78236ARZ-T7A?
The ISL78236ARZ-T7A integrates peak current limiting with hiccup-mode short-circuit response, reverse overcurrent detection (–1.5A to –3.5A), thermal shutdown at 150°C with 25°C hysteresis, undervoltage lockout (2.5V–2.85V), and soft-discharge during enable-low shutdown (RDIS ≈ 100Ω). All protections are fully autonomous and require no external components.
Is the ISL78236ARZ-T7A pin-compatible with other devices in the ISL782xx family?
No, the ISL78236ARZ-T7A has a unique 24-pin QFN pinout optimized for dual-channel layout and thermal performance; it is not pin-compatible with ISL78233 (single 3A) or ISL78238 (dual 4A). Pin assignments for LX, PGND, EN, PG, and FB are specific to its dual-synchronous architecture and must be implemented per the datasheet layout guidelines.
ISL78236ARZ-T7A 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:
- 2
- Voltage - Input (Min):
- 2.85V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 3A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
ISL78236ARZ-T7A FAQ
1.How can I place an order for ISL78236ARZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78236ARZ-T7A 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 ISL78236ARZ-T7A reliable?
The price and inventory of ISL78236ARZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78236ARZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL78236ARZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78236ARZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78236ARZ-T7A?
ISL78236ARZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78236ARZ-T7A 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 ISL78236ARZ-T7A?
For technical support, including ISL78236ARZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78236ARZ-T7A requirements.
6.How does Aetrix verify that ISL78236ARZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL78236ARZ-T7A 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 ISL78236ARZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL78236ARZ-T7A?
All ISL78236ARZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL78236ARZ-T7A, 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 ISL78236ARZ-T7A part is unused and in its original packaging.
Return procedure for ISL78236ARZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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