Features
- VIN operating range: 3.75V to 42V
- Low quiescent current: 6µA typical, one channel
- Switching frequency: 200kHz to 2.2MHz
- Dropout mode for high duty-cycle operation
- 25ns on-times for low duty-cycle operation
- External synchronization
- Programmable spread spectrum clocking
- 180° phase shift between channels
- 2A Sourcing/3A sinking MOSFET drivers
- Boot UVLO and programmable boot refresh time
- Extensive protection mechanisms for OV/UV/OC/OT
Description
The ISL78264 is a dual buck controller that can operate across a wide VIN range of 3.75V to 42V. It is designed to support wide duty-cycle operation for switching frequencies from 200kHz up to 2.2MHz. To mitigate EMI, it supports synchronization to an external clock or programmable spread spectrum clocking. Its current-mode modulator is ideally suited to tolerate severe line transients. Also, the ISL78264 supports dropout operation and low 25ns on-time to operate through automotive cranking and load dump pulses.
The ISL78264 integrates robust MOSFET drivers and readily supports step-down applications requiring high output currents in normal operation. For applications that must also sustain extremely low power, always-on operation, its energy conservation mode can reduce operating current to 6µA. Integrated feedback for VOUT1 is provided for 3.3V or 5V applications to eliminate the current otherwise flowing in external feedback resistors. An automatic switchover to an external supply is also supported to maximize efficiency. A blocking diode is activated after startup to prevent the external supply from back-biasing a low input voltage at VIN.
The ISL78264 is qualified to AEC-Q100 Grade 1, specified to operate across an ambient temperature range of -40°C to 125°C, and is available in a 5mm x 5mm, 32 Ld WFQFN (Wettable Flank) package.
Parameters
| Attributes | Value |
|---|---|
| Outputs (#) | 2 |
| Topology [Rail 1] | Buck |
| Input Voltage (Min) [Rail 1] (V) | 3.75 |
| Input Voltage (Max) [Rail 1] (V) | 42 - 42 |
| Output Voltage (Min) [Rail 1] (V) | 0.8 |
| Output Voltage (Max) [Rail 1] (V) | 5 |
| Output Current (Max) [Rail 1] (A) | 20 |
| Switching Frequency Range (Typical) (kHz) | 200 - 2200 |
| Qualification Level | Automotive |
| Temp. Range (°C) | -40 to +125°C |
| Simulation Model Available | No |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| WFQFN | 5.0 x 5.0 x 0.85 | 32 | 0.5 |
Application Block Diagrams
 | Automotive Camera System with AHL Control Channel Automotive AHL camera system with single-cable video transmission and control, plus I2C blower control. |
 | Parking Assistance System with AHL Camera Automotive parking camera system with HD analog link cuts cabling cost and maintains zero latency. |
 | Low-Cost Digital Instrument Cluster Low-cost digital cluster and HVAC display design with scalable graphics and fast-boot support. |
Additional Applications
- Automotive 12V Systems
- Infotainment/Multimedia Systems
- Cockpit safety systems
- Advanced Driver Assist Systems (ADAS)
Complete Your Design
Explore complementary products to elevate your design
Renesas Boards & Kits
Automotive Dual Synchronous Buck Controller with Integrated Drivers Evaluation Board
The ISL78264EVAL1Z evaluation board is used to evaluate the two-channel synchronous buck converter operation of the ISL78264 dual buck controller in which the converters have a 180° phase shift to minimize input capacitor stress. The board demonstrates the high efficiency of synchronous buck... Read More
Automotive 42V Dual Synchronous Boost & Low-Iq Buck Controllers with Integrated Drivers Evaluation Board
The ISL78263EVAL1Z evaluation board is used to evaluate the dual-converter, synchronous buck-and-boost operation of the ISL78263 controller. The board evaluates Channel 1, a synchronous buck operation that provides a system rail voltage, and Channel 2, a boost converter that is activated to... Read More
Support Communities
-
Dual back converter selection
HelloI am trying to find a buck converter with -2 outputs for 1.2V and 3.3V -1A each -Low temperature -capable of 22V-3.5V input. -Small layoutAny recomendation?
Mar 7, 2026
Knowledge Base
-
Can Channel 1 of ISL78263 or ISL78264 be Set to a Voltage Higher Than 5V In Adjustable Mode?
Channel 1's current sense pins must be kept less than the absolute maximum rating of 6.5V. If an output voltage higher than 5V is desired, it must be ensured that the design incorporates sufficient margin to ensure that absolute maximum is not violated. Exceeding 5V may be possible ...
Aug 5, 2020 -
Can ISL78263 or ISL78264 Support Inductor Current Higher than 10A?
Yes. When adjusting either channel's maximum load current, it is advised to rescale the power stage components, including MOSFETs, inductor, current sensing resistor, and output capacitance.
Aug 5, 2020 -
If ISL78264 is Operated with Both Channels Set for 3.3V Output, Can it Be Operated Without Using the Internal Linear Regulator to Improve Efficiency?
Yes. The 3.3V output can be boosted to 5V using a simple boost circuit with a controller such as the ISL78113A.
Aug 5, 2020
Support Communities
