ISL78206

40V 2.5A Buck Controller with Integrated High-Side MOSFET

Product Status: Mass Production

OVERVIEW

The ISL78206 is an AEC-Q100 qualified 40V, 2.5A synchronous buck controller with a high-side MOSFET and low-side driver integrated. The ISL78206 supports a wide input voltage range from 3V to 40V, output current up to 2.5A, and can be operated in synchronous and non-synchronous buck topologies. The ISL78206 provides a low system cost, high efficiency, single part buck solution for automotive applications for a wide variety of input voltages. For vehicle systems that must be kept powered during cold-cranking or start-stop operation, the ISL78206 can be replaced by its pin-to-pin alternative, the ISL78201 which offers boost-buck operation. Together, these devices offer two functional alternatives on the same PCB layout, providing convenience, flexibility, and facilitating extensive design reuse.

The ISL78206 offers the most robust current protections. It uses peak current mode control with cycle-by-cycle current limiting. It is implemented with frequency foldback undercurrent limit conditions. In addition, the hiccup overcurrent mode is also implemented to guarantee reliable operations under harsh short conditions.

The ISL78206 has comprehensive protections against various faults, including overvoltage, undervoltage, programmable overcurrent and over-temperature. Built-in soft-start allows the IC to start-up smoothly and is reactivated during hiccup mode fault recovery.

KEY FEATURES

  • Ultra wide input voltage range 3V to 40V (refer to “Input Voltage” on page 12 for more details)
  • Less than 5µA (max) shutdown input current (IC disabled)
  • Temperature range -40°C to +105°C
  • Integrated high-side MOSFET
  • Operational topologies
  • Synchronous buck
  • Non-synchronous buck
  • Programmable frequency from 200kHz to 2.2MHz and frequency synchronization capability
  • ±1% tight voltage regulation accuracy
  • Reliable cycle-by-cycle overcurrent protection
  • Temperature compensated current sense
  • Frequency foldback
  • Programmable OC limit
  • Hiccup mode protection in worst case short condition
  • 20 Ld HTSSOP package, pin-to-pin compatible with ISL78201 boost buck
  • AEC-Q100 qualified
  • Pb-free (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL78206
Basic Information
生产状态
Mass Production
输出数量
1
拓扑 [Rail 1]
Buck
输入电压最小值 (V) [Rail 1]
3
输入电压最大值 (V) [Rail 1]
40
输出电压最小值 (V) [Rail 1]
0.8
输出电压最大值 (V) [Rail 1]
38
输出电流最大值 (A) [Rail 1]
2.5
IQ [Rail 1]
1.3 mA
开关频率 (最大值) (MHz)
2.2
开关频率 (最小值) (MHz)
0.2
最大占空比 (%)
See Datasheet
资质级别
Automotive
峰值效率 (%)
96
POR
Yes
SYNCH功能
Yes
控制类型
Current Mode
开关频率范围 (MHz)
0.2 to 2.2
温度范围
-40 to +105

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