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Renesas ISL78214ARZ-T
- Part No.:
- ISL78214ARZ-T
- Manufacturer:
- Renesas
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ISL78214ARZ-T.pdf
- Description:
- IC REG BUCK ADJ 4A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,186
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Product details
Overview
ISL78214ARZ-T from Renesas Electronics (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-T datasheet, ISL78214ARZ-T pinout, ISL78214ARZ-T application, or ISL78214ARZ-T equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade thermal and protection behavior, and real-world design implications of its 100% duty cycle, soft-stop discharge, and SYNC-synchronized multi-phase operation.
Technical Context
The ISL78214ARZ-T employs current-mode PWM control with internal slope compensation and a 200mV/A current-sense gain, enabling fast transient response and stable loop dynamics across 0–4A load range. Its dual-mode operation-selectable forced PWM or PFM via the SYNCH pin-supports low-noise operation or ultra-low quiescent current (35µA in PFM).
It integrates matched P-Channel and N-Channel MOSFETs (50mΩ typical RDS(on) each at VIN=5V), supports external clock synchronization up to 4MHz with 140ns minimum on-time constraint, and delivers 100% duty cycle for <400mV dropout at 4A-critical for battery-powered automotive systems operating near end-of-discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 5.5V - supports wide automotive battery range including cold-crank (≥2.8V) and post-ignition (≤5.5V) |
| Output Current | Up to 4A continuous - sufficient for powering microcontrollers, FPGAs, and DSPs in ADAS and body control modules |
| Switching Frequency | 1MHz nominal, sync-capable up to 4MHz - enables compact 1.5µH inductors and reduces EMI filtering burden |
| Quiescent Current | 35µA in PFM mode - extends battery life in always-on vehicle subsystems like telematics or alarm controllers |
| Output Accuracy | ±2% over -40°C to +105°C, line, and load - ensures reliable µC/FPGA core voltage regulation without external trimming |
| Power-Good Delay | 1ms fixed delay after regulation - provides deterministic system reset timing for sequenced power-up |
| Thermal Shutdown | 140°C trip with 25°C hysteresis - protects against sustained overload while allowing recovery under intermittent loads |
| Duty Cycle Range | 0% to 100% - maintains regulation down to <400mV dropout at full load, critical for low-VIN battery backup scenarios |
Pinout & Package
ISL78214ARZ-T is housed in a RoHS-compliant, thermally enhanced 16-lead 4mm × 4mm QFN package with exposed pad (PKG DWG L16.4x4), requiring connection of the exposed pad to SGND for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 2) | Primary input supply | Accepts 2.8V–5.5V; requires local 10µF ceramic decoupling to PGND |
| VDD (Pin 3) | Analog supply rail | Must be tied directly to VIN; powers internal bandgap and error amplifier |
| EN (Pin 5) | Logic-controlled enable | Active-high; initiates soft-start and discharges output capacitor when pulled low |
| SYNCH (Pin 4) | Mode selection & sync input | High = forced PWM; low = PFM; external clock edge-triggered sync up to 4MHz |
| LX (Pins 14, 15) | Switch node | Connects to inductor; carries high di/dt switching current; layout critical for EMI |
| PGND (Pins 11, 12) | Power ground return | Low-impedance path for high-current switch return; separate from SGND |
| SGND (Pins 9, 10) | Signal ground reference | Reference for VFB, EN, PG, SYNCH; must connect to exposed pad |
| VFB (Pin 8) | Feedback input | Monitors output via resistor divider; 0.8V internal reference enables adjustable VOUT |
| PG (Pin 7) | Open-drain power-good | 1ms delayed active-low signal indicating regulated output; requires external pull-up |
| NC (Pins 6, 13, 16) | No-connect | Not internally bonded; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | P-Channel and N-Channel switches with 50mΩ typical RDS(on) - eliminates external FETs and gate drivers, reducing BOM count and layout area |
| Soft-Stop Output Discharge | Internal 100Ω switch actively discharges output during shutdown - prevents floating voltages and enables safe hot-swap or sequencing |
| Prebiased Output Startup | Supports start-up into precharged output capacitors - avoids reverse current flow and enables seamless power domain handover |
| Hiccup-Mode Overcurrent Protection | 17-cycle fault counter triggers thermal-safe restart after short-circuit - prevents destructive latch-up while maintaining system-level fault containment |
| AEC-Q100 Qualified | Rated for -40°C to +105°C ambient, with MSL3 moisture sensitivity - meets automotive reliability and manufacturing requirements |
| Internal Compensation | Fixed 27pF/390kΩ network - eliminates external compensation components and simplifies design validation |
Applications
| ADAS Camera Power Supply | Infotainment SoC Core Rail |
|---|---|
Use Scenario: Powers image sensor and ISP in rear-view or surround-view camera modules requiring clean, stable 1.2V/1.8V under engine vibration and wide temperature swings. IC Role / Device Role / Timing Role: Primary DC/DC POL regulator delivering 4A peak current with 1ms PG assertion for synchronized sensor initialization. Use Value: 97% efficiency and 35µA PFM quiescent current extend battery-backed operation; 100% duty cycle sustains output during 3.0V cold-crank events. |
Use Scenario: Supplies core voltage to ARM-based infotainment processors with dynamic load steps up to 3A during GPU bursts and audio decoding. IC Role / Device Role / Timing Role: High-transient-response buck converter with current-mode control and 1MHz switching to minimize output ripple and simplify filter design. Use Value: Fast load-step response (<10µs settling) and ±2% output accuracy ensure processor stability; SYNC input enables phase-shifted parallel operation to reduce input ripple. |
| Body Control Module (BCM) MCU Rail | Automotive Telematics Backup Power |
Use Scenario: Generates 3.3V rail for 8/32-bit MCUs managing door locks, lighting, and HVAC in harsh under-hood environments. IC Role / Device Role / Timing Role: Automotive-qualified synchronous buck providing robust 4A capability with hiccup-mode OCP and thermal shutdown. Use Value: AEC-Q100 qualification and -40°C to +105°C operation guarantee reliability; soft-start prevents inrush damage to MCU I/O during ignition cycles. |
Use Scenario: Maintains 1.8V supply to GNSS/GSM modules during main battery disconnect or deep sleep, powered by supercapacitor or small Li-ion cell. IC Role / Device Role / Timing Role: Ultra-low-IQ buck regulator operating in PFM mode to maximize hold-up time from energy-limited sources. Use Value: 35µA quiescent current extends backup runtime; 100% duty cycle enables regulation down to 2.8V input, maximizing usable energy from backup source. |
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-T | Pin-compatible 3A version; identical package, pinout, and feature set except lower current rating and reduced RDS(on) | Suitable where peak load ≤3A; lower thermal stress but insufficient for 4A FPGA cores | Select ISL78213ARZ-T only if system max load is confirmed ≤3A and board layout re-use is prioritized |
| MPQ4420AGL-AEC1-Z | 4A AEC-Q100 buck with 2.5V–36V input, 2.2MHz fixed frequency, no PFM mode, higher IQ (120µA) | Better for wide-input industrial or 12V automotive systems; lacks low-noise PFM and 100% duty cycle | Choose MPQ4420AGL-AEC1-Z when input exceeds 5.5V or 2.2MHz switching is required; not drop-in for ISL78214ARZ-T |
Compared with ISL78214ARZ-T, ISL78213ARZ-T offers identical functionality at reduced current capacity, while MPQ4420AGL-AEC1-Z trades PFM efficiency and 100% duty cycle for wider VIN range and higher frequency-making ISL78214ARZ-T optimal for 2.8V–5.5V battery-fed automotive POLs demanding lowest quiescent power and maximum dropout margin.
Availability
ISL78214ARZ-T is available at Aetrix Electronics and suitable for automotive power management, DC/DC point-of-load modules, and µC/FPGA/DSP power applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for ISL78214ARZ-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 acquired Intersil in 2017 and continues to manufacture and support its high-reliability analog and power management portfolio for automotive and industrial markets.
The ISL78214ARZ-T belongs to Renesas' automotive-qualified power management IC family, designed specifically for demanding vehicle subsystems such as ADAS, infotainment, and body electronics requiring AEC-Q100 reliability and extended temperature operation.
FAQ
What is the maximum output current capability of the ISL78214ARZ-T?
The ISL78214ARZ-T delivers up to 4A continuous output current under recommended operating conditions (VIN = 2.8V–5.5V, TA = -40°C to +105°C). Peak switch current limit is 6.0A (typical), with hiccup-mode overcurrent protection engaging at 4.9A to safeguard against sustained overload. Derating applies above +85°C ambient per thermal resistance data.
Does the ISL78214ARZ-T support synchronization with an external clock?
Yes, the ISL78214ARZ-T supports external clock synchronization up to 4MHz via the SYNCH pin, triggered on the falling edge. This allows multiple ISL78214ARZ-T devices to operate out-of-phase, reducing input/output ripple and eliminating beat frequencies in multi-rail systems-critical for noise-sensitive automotive imaging and audio applications.
How does the ISL78214ARZ-T handle startup into a prebiased output?
The ISL78214ARZ-T supports prebiased output startup through its SKIP-mode soft-start architecture. When VFB is >0.2V at enable, it enters skip mode immediately, preventing reverse current flow and enabling safe power-up into existing output voltage-essential for hot-swap and power-domain handover in modular automotive ECUs.
What protection features are integrated into the ISL78214ARZ-T?
The ISL78214ARZ-T integrates hiccup-mode overcurrent protection (17-cycle fault counter), output overvoltage detection (92%–95% regulation threshold), thermal shutdown at 140°C with 25°C hysteresis, input UVLO (2.6V rising), and short-circuit protection via VFB monitoring. All protections are fully autonomous and require no external components.
Is the ISL78214ARZ-T pin-compatible with other members of the ISL782xx family?
Yes, the ISL78214ARZ-T is pin-compatible with the ISL78213ARZ-T (3A variant), sharing identical 16-lead 4mm×4mm QFN package, pinout, and control interface. This enables scalable design reuse across current requirements while maintaining layout compatibility and minimizing redesign effort in automotive platforms.
ISL78214ARZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for ISL78214ARZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78214ARZ-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 ISL78214ARZ-T reliable?
The price and inventory of ISL78214ARZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78214ARZ-T is usually 5 days.
3.What payment methods are accepted for ISL78214ARZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78214ARZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78214ARZ-T?
ISL78214ARZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78214ARZ-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 ISL78214ARZ-T?
For technical support, including ISL78214ARZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78214ARZ-T requirements.
6.How does Aetrix verify that ISL78214ARZ-T is sourced from the original manufacturer or authorized distributors?
All ISL78214ARZ-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 ISL78214ARZ-T meets industry standards.
7.What is the process for return or replacement of ISL78214ARZ-T?
All ISL78214ARZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL78214ARZ-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 ISL78214ARZ-T part is unused and in its original packaging.
Return procedure for ISL78214ARZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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