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Renesas ISL78214ARZ
- Part No.:
- ISL78214ARZ
- Manufacturer:
- Renesas
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ISL78214ARZ.pdf
- Description:
- IC REG BUCK ADJ 4A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:743
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Product details
Overview
ISL78214ARZ from Renesas (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 4A continuous output current from a 2.8V–5.5V input, featuring 1MHz PWM switching, 97% peak efficiency, 2% output voltage accuracy over temperature/load/line, and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the ISL78214ARZ datasheet, ISL78214ARZ pinout, ISL78214ARZ application, or ISL78214ARZ equivalent, key selection criteria include its 35µA quiescent current in PFM mode, 100% duty-cycle operation enabling sub-400mV dropout at 4A, internal soft-start with 1ms ramp, power-good timing, and synchronization capability up to 4MHz.
Technical Context
The ISL78214ARZ employs current-mode PWM control with integrated P- and N-channel MOSFETs (typ. 50mΩ each), slope compensation, and zero-cross sensing for skip-mode entry. Its dual-mode operation-forced PWM or PFM-is selected via the SYNCH pin, enabling optimized efficiency across load ranges.
Protection architecture includes hiccup-mode overcurrent limiting (17-cycle fault counter), thermal shutdown at +140°C with +25°C hysteresis, output overvoltage detection, and short-circuit protection via VFB monitoring below 0.2V. The 1ms PG delay and soft-stop discharge function support robust power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 5.5V - supports wide automotive battery range including cold-crank transients down to 2.8V. |
| Output Current | Up to 4A continuous - sufficient for powering microcontrollers, FPGAs, and DSPs without external boost stages. |
| Switching Frequency | 1MHz nominal, syncable to 4MHz - enables compact 1.5µH inductor and minimal PCB area; avoids AM band interference. |
| Quiescent Current | 35µA in PFM mode - extends battery life in always-on automotive modules such as telematics or ADAS sensors. |
| Output Accuracy | ±2% over -40°C to +105°C, line, and load - ensures stable core voltage for safety-critical µC/FPGA operation. |
| Duty Cycle | 100% maximum - maintains regulation during deep battery discharge, reducing dropout to ≤400mV at 4A. |
| Power-Good Delay | 1ms fixed delay - provides deterministic system reset timing after output stabilization, compatible with processor POR requirements. |
Pinout & Package
ISL78214ARZ is housed in a RoHS-compliant, thermally enhanced 16-lead 4mm × 4mm QFN package with exposed pad (PKG DWG L16.4x4). The exposed pad must be soldered to SGND for electrical integrity and optimal thermal performance (θJC = 3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 VIN | Input power supply | Primary DC input connection; requires local 10µF ceramic decoupling to PGND. |
| 3 VDD | Analog supply rail | Bias supply for internal circuitry; must be tied directly to VIN for proper reference stability. |
| 4 SYNCH | Mode control / sync input | Selects PWM (HI), PFM (LO), or external clock sync (falling-edge triggered); not floating. |
| 5 EN | Enable control | Active-high logic input; initiates soft-start when high, discharges output capacitor when low. |
| 7 PG | Power-good indicator | Open-drain output with 1ms delay; signals regulated output status to host controller or sequencer. |
| 8 VFB | Feedback node | Connects to resistor divider for adjustable output (0.8V ref); bias current <0.1µA minimizes divider error. |
| 14, 15 LX | Switch node | Drives external inductor; connects to source of internal P-MOSFET and drain of N-MOSFET. |
| 11, 12 PGND | Power ground | High-current return path for switching loop; separate from SGND to reduce noise coupling. |
| 9, 10 SGND | Signal ground | Reference for analog blocks (error amp, comparators); connected to exposed pad for thermal/electrical performance. |
| 6, 13, 16 NC | No connect | Unbonded pins; must remain unconnected per design. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | P- and N-channel switches with typ. 50mΩ RDS(on) each - eliminates external FETs and gate drivers, reducing BOM count and layout complexity. |
| Soft-stop discharge | Internal 100Ω switch actively discharges output capacitor on shutdown - prevents residual voltage from interfering with downstream logic states. |
| Prebiased start-up | Supports startup into precharged output - essential for hot-swap and multi-rail sequencing where output may already be biased before enable. |
| External synchronization | Sink capable SYNCH pin accepts external clock up to 4MHz with falling-edge trigger - enables phase-shifted multi-phase operation to reduce input/output ripple. |
| AEC-Q100 qualification | Rated for -40°C to +105°C ambient, with full automotive reliability testing - meets functional safety requirements for body control, infotainment, and ADAS subsystems. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Providing clean, sequenced 1.2V/1.8V rails to SoCs and image signal processors in head units and digital dashboards. IC Role / Device Role / Timing Role: Primary POL regulator delivering 4A with tight transient response and 1ms PG assertion for safe SoC boot. Use Value: 97% efficiency and 35µA quiescent current extend runtime in parked-state infotainment; AEC-Q100 ensures reliability over vehicle lifetime. | Use Scenario: Powering high-speed MIPI CSI-2 camera sensors and companion ISPs in forward-facing ADAS cameras. IC Role / Device Role / Timing Role: Core voltage regulator with fast load-step response (<10µs recovery) and precise 2% output accuracy for pixel clock stability. Use Value: 100% duty cycle maintains regulation during engine cranking dips; SYNC input allows ripple cancellation across multiple camera rails. |
| Engine Control Unit (ECU) Auxiliary Rail | FPGA-Based Vehicle Gateway |
Use Scenario: Generating isolated 3.3V auxiliary supply for CAN transceivers and sensor interfaces within engine bay ECUs. IC Role / Device Role / Timing Role: High-reliability buck converter operating continuously at +105°C ambient with hiccup-mode OCP for short-circuit resilience. Use Value: Thermal shutdown at +140°C with +25°C hysteresis prevents latch-up; PG output coordinates watchdog reset timing with ECU firmware. | Use Scenario: Delivering 1.5V/1.8V core power to Xilinx Artix-7 or Intel Cyclone V FPGAs in vehicle-to-cloud gateway modules. IC Role / Device Role / Timing Role: Programmable-output buck regulator with adjustable feedback divider and internal soft-start for FPGA configuration sequencing. Use Value: Internal compensation eliminates external compensation components; 16-pin QFN fits dense gateway PCB layouts while maintaining thermal margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL78213ARZ | Pin-compatible 3A version with identical pinout and feature set; lower current rating and reduced thermal capability. | Suitable for lower-power MCU or sensor nodes where 4A headroom is unnecessary. | Select ISL78213ARZ only if output current demand is ≤3A and board layout re-use is critical. |
| MPQ4420AGL-AEC1-Z | Monolithic 4A buck with 3.8–60V input, higher VIN range, no PFM mode, and different pinout; AEC-Q100 qualified. | Used in 12V/24V automotive systems requiring wider input range; lacks 100% duty cycle and soft-stop discharge. | Choose MPQ4420AGL-AEC1-Z for high-input-voltage applications; avoid if prebiased start-up or ultra-low IQ is required. |
Compared with ISL78214ARZ, ISL78213ARZ offers direct pin compatibility but reduced current capacity, while MPQ4420AGL-AEC1-Z supports higher input voltages at the cost of missing PFM efficiency and soft-stop functionality - making ISL78214ARZ optimal for low-VIN, high-efficiency, and sequenced automotive POL designs.
Availability
ISL78214ARZ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and engine control unit (ECU) auxiliary power supplies requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for ISL78214ARZ 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 its automotive-grade analog portfolio with rigorous TS16949-based manufacturing and AEC-Q100 validation.
The ISL78214ARZ belongs to Renesas' automotive-qualified power management IC family, designed specifically for high-reliability point-of-load conversion in harsh-temperature vehicle subsystems including infotainment, ADAS, and body electronics.
FAQ
What is the maximum continuous output current supported by the ISL78214ARZ?
The ISL78214ARZ delivers up to 4A continuous output current under recommended operating conditions (VIN = 2.8V–5.5V, TA = –40°C to +105°C). This rating is validated with proper thermal design using the exposed pad connected to SGND and adequate PCB copper area. Peak current limit is 6.0A, supporting transient loads beyond steady-state requirements. The ISL78214ARZ maintains regulation even at 100% duty cycle, enabling operation down to sub-400mV dropout at full 4A load.
Does the ISL78214ARZ support prebiased output startup?
Yes, the ISL78214ARZ supports startup into a precharged output voltage. During soft-start, the device operates in SKIP mode and regulates based on feedback rather than forcing a rising ramp, allowing safe engagement when VOUT is already present. This behavior is explicitly confirmed in the datasheet's Theory of Operation section and is critical for hot-swap and multi-rail sequencing applications. The ISL78214ARZ does not latch or malfunction when enabled into a prebiased condition.
How does the ISL78214ARZ handle overcurrent and short-circuit conditions?
The ISL78214ARZ implements dual-layer protection: peak current limiting triggers immediate P-MOSFET shutdown when sensed switch current exceeds ~5.7A, and a 17-cycle hiccup counter initiates auto-restart after four soft-start delays if faults persist. For short circuits, the SCP comparator monitors VFB and reduces oscillator frequency to 1/3 normal when VFB falls below 0.2V - preventing destructive current buildup. Both mechanisms are fully internal and require no external components. The ISL78214ARZ remains protected across its full –40°C to +105°C operating range.
What is the purpose of the exposed thermal pad on the ISL78214ARZ QFN package?
The exposed pad on the ISL78214ARZ's 4mm × 4mm QFN package serves two critical functions: it provides the primary thermal conduction path (θJC = 3°C/W) from the die to the PCB, and it forms the low-impedance signal ground (SGND) reference for internal analog circuitry. Per the datasheet, the pad must be soldered directly to the SGND plane using multiple thermal vias - failure to do so degrades both thermal performance and regulation accuracy. It is not optional; omitting this connection risks thermal shutdown and output instability.
Can the ISL78214ARZ be synchronized to an external clock, and what are the timing constraints?
Yes, the ISL78214ARZ accepts an external clock signal on the SYNCH pin for synchronization up to 4MHz. The device triggers on the falling edge of the external clock, aligning the LX rising edge accordingly. To ensure reliable operation, the minimum ON-time of the LX node must exceed 140ns - which constrains the maximum usable frequency based on output voltage and inductor value. The SYNCH pin also serves dual-purpose as the mode select (PWM/PFM), so external clocking requires driving it with a clean, rail-to-rail square wave referenced to GND.
ISL78214ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 4A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
ISL78214ARZ FAQ
1.How can I place an order for ISL78214ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78214ARZ 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 ISL78214ARZ reliable?
The price and inventory of ISL78214ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78214ARZ is usually 5 days.
3.What payment methods are accepted for ISL78214ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78214ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78214ARZ?
ISL78214ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78214ARZ 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 ISL78214ARZ?
For technical support, including ISL78214ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78214ARZ requirements.
6.How does Aetrix verify that ISL78214ARZ is sourced from the original manufacturer or authorized distributors?
All ISL78214ARZ 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 ISL78214ARZ meets industry standards.
7.What is the process for return or replacement of ISL78214ARZ?
All ISL78214ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL78214ARZ, 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 ISL78214ARZ part is unused and in its original packaging.
Return procedure for ISL78214ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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