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Renesas ISL78233ARZ
- Part No.:
- ISL78233ARZ
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL78233ARZ.pdf
- Description:
- IC REG BUCK ADJ 3A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,713
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Product details
Overview
ISL78233ARZ from Renesas Electronics is a monolithic synchronous buck regulator delivering up to 3A continuous output current from a 2.7V–5.5V input, featuring integrated 35mΩ P-channel and 11mΩ N-channel MOSFETs, adjustable 500kHz–4MHz switching frequency (default 2MHz), and AEC-Q100 qualification for automotive power delivery in microcontroller and SoC applications.
For engineers reviewing the ISL78233ARZ datasheet, ISL78233ARZ pinout, ISL78233ARZ application, or ISL78233ARZ equivalent, key selection criteria include its 3A output capability, -40°C to +125°C operating range, 0.6V reference voltage with ±1.2% accuracy, 1ms power-good delay, and soft-stop output discharge during shutdown - all critical for infotainment and ADAS power rail design.
Technical Context
The ISL78233ARZ employs current-mode PWM control with slope compensation (440mV/Ts) and pulse-by-pulse current limiting, enabling fast transient response and stable loop behavior across wide load and line variations. Its dual-mode operation supports forced continuous conduction (reduced EMI) or discontinuous mode (higher light-load efficiency).
Internal protection includes hiccup-mode overcurrent limiting, thermal shutdown at 150°C with 25°C hysteresis, overvoltage and undervoltage monitoring via FB, and negative current detection down to -6.0A. The device integrates soft-start (1ms fixed or capacitor-adjustable), 100% duty-cycle capability for <200mV dropout at full load, and external synchronization up to 4MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports compact POL designs for µC/FPGA core rails without external current boosting. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion, automotive 3.3V/5V rails, and post-regulated supplies. |
| Reference Voltage | 0.600V ±1.2% - enables precise output setting from 0.6V to VIN−losses using external resistor divider. |
| Switching Frequency | Adjustable 500kHz–4MHz (default 2MHz) - balances size (smaller inductors/caps at high fSW) and efficiency (optimized at 1–2MHz). |
| FET ON-Resistance | P-ch 35mΩ / N-ch 11mΩ (typ @ 5V) - minimizes conduction loss and enables >95% peak efficiency at 1.2V/3A. |
| Operating Temperature | -40°C to +125°C junction - validated for under-hood automotive environments per AEC-Q100 Grade 1. |
| Quiescent Current | 45µA (no load, PFM) - extends battery runtime in always-on vehicle modules. |
Pinout & Package
ISL78233ARZ is housed in a RoHS-compliant 3mm × 3mm, 16-lead Thin Quad Flat No-Lead (TQFN) package with exposed thermal pad connected to SGND. Pin layout follows standard TQFN top-view orientation with VIN on both ends for low-impedance input routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 16) | Input power supply | Accepts 2.7–5.5V; requires ≥2×22µF ceramic decoupling close to pins to suppress high-frequency ripple. |
| PHASE (Pins 13–15) | Switching node | Connects directly to inductor; internal 100Ω discharge path during shutdown prevents floating node oscillation. |
| FB (Pin 9) | Feedback input | Monitors output via resistor divider; sets VOUT = 0.6V × (1 + R2/R3); also used for PG and UV/OV protection. |
| EN (Pin 5) | Enable control | Active-high logic; pulls output to 0V and discharges VOUT via internal soft-stop switch when low. |
| PG (Pin 3) | Power-good indicator | Open-drain output with 1ms delay after regulation; requires external pull-up to VIN for system sequencing. |
| SS (Pin 7) | Soft-start timing | Grounded for fixed 1ms ramp; capacitor to SGND extends soft-start for inrush current control in multi-rail systems. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated FETs | 35mΩ P-ch / 11mΩ N-ch MOSFETs reduce BOM count to ≤3 external components (inductor + 2 caps) for basic operation. |
| 100% Duty-Cycle Mode | Enables <200mV dropout at 3A - critical for maintaining regulation during cold-crank (VIN dip to 2.7V) in automotive systems. |
| Configurable Light-Load Mode | SYNC pin selects PWM (low-noise, fixed fSW) or PFM (high-efficiency, variable fSW) - adapts to dynamic SoC workload profiles. |
| AEC-Q100 Qualified | Validated for automotive Grade 1 (-40°C to +125°C) with latch-up immunity (100mA), ESD robustness (5kV HBM), and MSL3 reflow compatibility. |
| Internal/External Compensation | COMP pin supports either internal compensation (tie to VDD) or flexible external network - simplifies loop tuning for diverse output capacitors. |
Applications
| Automotive Infotainment Power | Microcontroller Core Supply |
|---|---|
|
Use Scenario: Powering ARM-based SoCs and display controllers in head units with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Primary 1.2V/1.8V POL regulator delivering clean, sequenced power with PG signaling for safe boot. Use Value: 2MHz switching enables <1µH inductors and reduces solution footprint by >30% vs. 500kHz alternatives while maintaining >92% efficiency at 2A. |
Use Scenario: Supplying 3.3V or adjustable core voltage to automotive-grade MCUs (e.g., RH850, S32K) requiring tight load regulation. IC Role / Device Role / Timing Role: High-accuracy buck converter with ±1.2% reference and 1ms PG delay for deterministic power-on reset timing. Use Value: Soft-stop discharge ensures rapid, controlled VDD ramp-down during MCU sleep entry - eliminating brown-out glitches. |
| FPGA I/O Bank Regulation | Li-ion Powered Telematics Module |
|
Use Scenario: Delivering stable 1.8V/2.5V to FPGA I/O banks with fast transient response to digital switching noise. IC Role / Device Role / Timing Role: Synchronous buck with current-mode control and 100ns minimum on-time for sub-100ns load step recovery. Use Value: Dual-mode operation allows PFM during idle (45µA IQ) and seamless transition to PWM during burst data transfers - optimizing battery life and signal integrity. |
Use Scenario: Regulating 3.3V system rail from single-cell Li-ion (2.7–4.2V) in GPS/4G telematics units with extended temperature operation. IC Role / Device Role / Timing Role: Automotive-qualified DC/DC with 100% duty cycle and -40°C to +125°C rating for under-dash mounting. Use Value: Integrated thermal shutdown (150°C) and hiccup-mode OCP prevent thermal runaway during sustained 3A loads in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL78234ARZ | 4A output rating, identical pinout and feature set; higher current limit (6.7A typ) and lower RDS(on) optimized for heavier loads. | Required where sustained >3A output or higher peak current margin is needed (e.g., multi-core SoC with burst loads). | Select ISL78234ARZ only if design requires >3A continuous output; otherwise ISL78233ARZ offers optimal cost/size trade-off. |
| MPQ4433AGL-AEC1-Z | 3A rated, 2.5–6.5V input, 500kHz–3MHz fSW, but lacks AEC-Q100 certification and soft-stop discharge function. | Suitable for industrial or consumer applications where automotive qualification and controlled shutdown are not mandatory. | Choose MPQ4433AGL-AEC1-Z for non-automotive designs needing wider VIN range; avoid where AEC-Q100 or soft-stop is required. |
Compared with ISL78234ARZ, the ISL78233ARZ provides tighter thermal performance in the same 3x3mm footprint due to lower conduction loss at 3A, while MPQ4433AGL-AEC1-Z trades automotive reliability for broader input flexibility - making ISL78233ARZ the optimal choice for AEC-Q100-compliant 3A POLs.
Availability
ISL78233ARZ is available at Aetrix Electronics and suitable for automotive infotainment power, microcontroller core supply, and Li-ion powered telematics modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL78233ARZ 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, and automotive SoCs, with deep expertise in functional-safety and AEC-Q100 qualified power management ICs.
The ISL78233ARZ belongs to Renesas' ISL7823x automotive buck regulator family, designed specifically for high-reliability, space-constrained DC/DC conversion in infotainment, ADAS, and body electronics systems.
FAQ
What is the maximum continuous output current of the ISL78233ARZ?
The ISL78233ARZ delivers up to 3A of continuous output current across its full operating temperature range (-40°C to +125°C). This rating is validated with proper PCB thermal design using the exposed pad connected to SGND via multiple vias. Peak current capability reaches 6.0A (typical) before hiccup-mode overcurrent protection activates.
Does the ISL78233ARZ support adjustable output voltage?
Yes, the ISL78233ARZ supports fully adjustable output voltage from 0.6V up to just below the input voltage using an external resistor divider connected to the FB pin. The internal 0.600V reference has ±1.2% accuracy over temperature, load, and line conditions - enabling precise regulation for 1.2V, 1.8V, 2.5V, or 3.3V rails.
How does the ISL78233ARZ handle shutdown and output discharge?
When the EN pin is driven low, the ISL78233ARZ enters shutdown mode and actively discharges the output capacitor through an internal soft-stop switch. This controlled discharge prevents floating outputs and ensures safe, glitch-free power-down sequencing - a critical feature for automotive MCU and SoC applications.
Is the ISL78233ARZ pin-compatible with other devices in the ISL7823x family?
Yes, the ISL78233ARZ shares identical pinout and package (3x3mm TQFN) with ISL78234ARZ and ISL78235ARZ. This common footprint allows straightforward power scalability - for example, upgrading from 3A to 4A output by replacing ISL78233ARZ with ISL78234ARZ without PCB redesign.
What protection features are integrated into the ISL78233ARZ?
The ISL78233ARZ integrates comprehensive protection: hiccup-mode overcurrent limiting, thermal shutdown at 150°C (25°C hysteresis), output overvoltage and undervoltage detection via FB, negative current sensing down to -6.0A, and input UVLO (2.7V rising threshold). All protections operate autonomously without external components.
ISL78233ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 3A
- Frequency - Switching:
- 420kHz ~ 4.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
ISL78233ARZ FAQ
1.How can I place an order for ISL78233ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78233ARZ 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 ISL78233ARZ reliable?
The price and inventory of ISL78233ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78233ARZ is usually 5 days.
3.What payment methods are accepted for ISL78233ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78233ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78233ARZ?
ISL78233ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78233ARZ 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 ISL78233ARZ?
For technical support, including ISL78233ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78233ARZ requirements.
6.How does Aetrix verify that ISL78233ARZ is sourced from the original manufacturer or authorized distributors?
All ISL78233ARZ 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 ISL78233ARZ meets industry standards.
7.What is the process for return or replacement of ISL78233ARZ?
All ISL78233ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL78233ARZ, 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 ISL78233ARZ part is unused and in its original packaging.
Return procedure for ISL78233ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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