My Inquiry
My Account
Renesas ISL78208ARZ-T
- Part No.:
- ISL78208ARZ-T
- Manufacturer:
- Renesas
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL78208ARZ-T.pdf
- Description:
- IC REG BUCK ADJ 3A DL 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,429
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL78208ARZ-T from Renesas Electronics is a dual-channel automotive-grade synchronous buck regulator with integrated 3A N-Channel MOSFETs per channel, 4.5V–28V input range, 500kHz default switching frequency (adjustable 300kHz–2MHz), peak current mode control, and independent power-good outputs. It delivers stable 3A continuous output per channel for infotainment and embedded processor power rails.
For engineers reviewing the ISL78208ARZ-T datasheet, ISL78208ARZ-T pinout, ISL78208ARZ-T application, or ISL78208ARZ-T equivalent, key selection factors include its -40°C to +105°C automotive qualification, dual-output tracking/sequencing capability, internal 2ms soft-start, and wettable flank QFN package for automated optical inspection.
Technical Context
The ISL78208ARZ-T implements peak current mode control with external compensation via COMP1/COMP2 pins, enabling robust loop stability across wide VIN and load variations. Its dual PWM controllers operate independently with selectable in-phase or out-of-phase switching via SYNCIN logic level.
Each channel features dedicated feedback (FB1/FB2), soft-start (SS1/SS2), enable (EN1/EN2), and power-good (PGOOD1/PGOOD2) signals, supporting independent voltage regulation, ratiometric/absolute tracking, and precise sequencing for multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V - supports 12V/24V automotive battery systems with cold-crank margin. |
| Output Current (per channel) | 3A continuous - enables dual 3A point-of-load conversion without external MOSFETs. |
| Switching Frequency | 500kHz default (300kHz–2MHz adjustable) - balances efficiency, size, and EMI in space-constrained designs. |
| Reference Voltage | 0.800V ±1% - sets output voltage via external resistor divider; enables 0.8V minimum VOUT. |
| Operating Temperature | -40°C to +105°C - qualified for under-hood automotive applications per AEC-Q100. |
| Package | 32-pin WFQFN 5mm×5mm - wettable flank design ensures solder joint reliability and AOI compatibility. |
| Protection Features | OCP (5.1A typ), thermal shutdown (150°C), UVLO (4.4V rising), BOOT undervoltage - safeguards against fault conditions without external circuitry. |
Pinout & Package
The ISL78208ARZ-T is housed in a 5mm × 5mm, 32-lead Wettable Flank Quad Flat No-Lead (WFQFN) package with exposed thermal pad (EPAD) connected to SGND. Pin 29 (SGND) must be soldered directly to PCB ground plane using multiple vias for optimal thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1/VIN2 | Power input supply | Accepts 4.5V–28V; requires ≥10µF ceramic decoupling per input near IC. |
| PHASE1/PHASE2 | Switch node output | Connects internal high-side MOSFET drain to external inductor and Schottky diode cathode. |
| BOOT1/BOOT2 | Bootstrap supply | Drives gate of internal N-MOSFET; requires external capacitor to PHASE pin. |
| FB1/FB2 | Feedback input | Negative input to error amplifier; sets output voltage via resistor divider to 0.8V reference. |
| PGOOD1/PGOOD2 | Open-drain status | Pulled low during soft-start or if output falls below 94% (rise) / 85.5% (fall) of target. |
| EN1/EN2 | Enable control | Active-high; enables channel when >2V; minimum off-time depends on SS capacitor value. |
| SYNCIN/SYNCOUT | Frequency sync interface | SYNCIN accepts external clock (300kHz–2MHz); SYNCOUT provides inverted signal for daisy-chaining. |
| FS | Frequency select | Tied to VCC for 500kHz; resistor to GND adjusts frequency from 300kHz to 2MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Independent output tracking | Supports ratiometric, absolute, sequential, or independent start-up-enables safe powering of multi-core processors with strict rail sequencing requirements. |
| Internal 5V LDO (VCC) | Provides bias for internal circuitry; rated for ≤10mA load-eliminates need for external bias supply. |
| Peak current mode control | Enables fast transient response and inherent input voltage feed-forward-reduces output filter component count and simplifies compensation. |
| Wettable flank QFN | Facilitates automated optical inspection of solder joints-critical for automotive manufacturing traceability and zero-defect goals. |
| Thermal overload protection | Shuts down at 150°C junction temperature with 20°C hysteresis-prevents permanent damage during sustained overload or poor heatsinking. |
Applications
| Infotainment System Power | DSP/Embedded Processor Core Supply |
|---|---|
Use Scenario: Powering display controller, audio codec, and navigation MCU in automotive head units. IC Role / Device Role / Timing Role: Dual 3A buck regulator delivering independent 5V and 3.3V rails with synchronized or out-of-phase operation to reduce input ripple. Use Value: Eliminates two discrete DC/DC converters; meets AEC-Q100 temp range and EMI targets via programmable 300kHz–2MHz switching. | Use Scenario: Supplying core and I/O voltages for automotive ADAS SoCs requiring precise rail sequencing. IC Role / Device Role / Timing Role: Provides ratiometric or absolute tracking between channels to ensure correct power-up order of processor domains. Use Value: Internal soft-start (2ms) and independent PGOOD signals enable reliable boot without external supervisors. |
| Automotive Camera Module Power | Telematics Control Unit (TCU) Power |
Use Scenario: Generating clean 1.2V and 2.5V supplies for image sensor and ISP in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Regulates low-noise outputs using external LC filters; leverages peak current mode for fast load transient recovery. Use Value: 0.8V reference and precision FB tolerance (±1%) support tight output regulation required by high-speed imaging sensors. | Use Scenario: Delivering 3.3V and 5V rails to cellular modem, GNSS receiver, and CAN transceiver in vehicle connectivity modules. IC Role / Device Role / Timing Role: Dual-channel regulator with independent EN/PGOOD enables modular power management and fault isolation. Use Value: Overcurrent protection (5.1A typ) and thermal shutdown prevent field failures in thermally constrained TCU enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4332-AEC1 | Integrated dual 3A synchronous buck with internal high-/low-side MOSFETs; no external diode required. | Eliminates Schottky diode but lacks independent PGOOD and tracking modes. | Choose MPQ4332-AEC1 for simplified BOM and higher efficiency where rail sequencing is not required. |
| TPS543B20RHLT | Single-channel 3A buck with PMBus interface; requires two devices for dual-rail solution. | Offers digital telemetry and dynamic voltage scaling-unsuitable for cost-sensitive analog-only designs. | Choose TPS543B20RHLT only when telemetry, remote configuration, or tighter output accuracy (<±0.5%) are mandatory. |
Compared with MPQ4332-AEC1 and TPS543B20RHLT, the ISL78208ARZ-T uniquely combines dual 3A analog regulation, flexible tracking/sequencing, and automotive-qualified wettable flank packaging-making it optimal for infotainment and ADAS power where analog control simplicity and manufacturability are prioritized over digital features or monolithic integration.
Availability
ISL78208ARZ-T is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL78208ARZ-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 is a global semiconductor leader specializing in microcontrollers, analog power management, and automotive SoCs, with deep expertise in functional safety and AEC-Q100-compliant design.
The ISL78208ARZ-T belongs to Renesas' ISL78xxx automotive power management family, engineered specifically for high-reliability, wide-input DC/DC conversion in infotainment, body electronics, and ADAS subsystems.
FAQ
What is the maximum continuous output current per channel for the ISL78208ARZ-T?
The ISL78208ARZ-T delivers 3A continuous output current per channel under recommended operating conditions (TA ≤ +105°C, proper PCB layout, and thermal management). This rating assumes use of an external Schottky diode and appropriate output inductors/capacitors as specified in the datasheet's application guidelines.
Does the ISL78208ARZ-T require an external Schottky diode?
Yes, the ISL78208ARZ-T requires an external Schottky diode for each channel because it integrates only the high-side N-Channel MOSFET. The datasheet explicitly recommends Schottky diodes (e.g., B340B) to minimize conduction losses and improve efficiency, especially at high duty cycles and elevated temperatures.
Can the ISL78208ARZ-T operate in current-sharing mode for a single 6A output?
Yes, the ISL78208ARZ-T supports current sharing between channels to deliver up to 6A from a single output. Figure 3 in the datasheet shows the required configuration: paralleling PHASE1/PHASE2, connecting shared inductor/diode, and tying FB1/FB2 together. Output voltage regulation remains accurate, and load balancing is achieved via matched external components.
What is the function of the FS pin on the ISL78208ARZ-T?
The FS pin on the ISL78208ARZ-T selects the internal oscillator frequency: tied to VCC for 500kHz default operation, or connected to GND via a resistor to set frequency from 300kHz to 2MHz. This resistor-based programming allows optimization of efficiency, component size, and EMI without changing the IC or layout.
Is the ISL78208ARZ-T qualified for automotive applications?
Yes, the ISL78208ARZ-T is AEC-Q100 qualified for automotive applications, rated for -40°C to +105°C ambient operation, and packaged in a Pb-free, RoHS-compliant WFQFN with wettable flanks. Its protection features-including thermal shutdown, overcurrent, and UVLO-meet stringent automotive reliability requirements.
ISL78208ARZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-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):
- 4.5V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 26V
- Current - Output:
- 3A
- Frequency - Switching:
- 300kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 32-QFN (5x5)
ISL78208ARZ-T FAQ
1.How can I place an order for ISL78208ARZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78208ARZ-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 ISL78208ARZ-T reliable?
The price and inventory of ISL78208ARZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78208ARZ-T is usually 5 days.
3.What payment methods are accepted for ISL78208ARZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78208ARZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78208ARZ-T?
ISL78208ARZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78208ARZ-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 ISL78208ARZ-T?
For technical support, including ISL78208ARZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78208ARZ-T requirements.
6.How does Aetrix verify that ISL78208ARZ-T is sourced from the original manufacturer or authorized distributors?
All ISL78208ARZ-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 ISL78208ARZ-T meets industry standards.
7.What is the process for return or replacement of ISL78208ARZ-T?
All ISL78208ARZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL78208ARZ-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 ISL78208ARZ-T part is unused and in its original packaging.
Return procedure for ISL78208ARZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL78208ARZ-T Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
