ISL78208

Wide V<sub>IN</sub> Dual Standard Buck Regulator with 3A/3A Continuous Output Current

OVERVIEW

The ISL78208 is a dual standard buck regulator capable of 3A per channel with continuous output current. With an input range of 4.5V to 28V, it provides a high frequency power solution for a variety of point of load applications.

The PWM controller in the ISL78208 drives an internal switching N-Channel power MOSFET and requires an external Schottky diode to generate the output voltage. The integrated power switch is optimized for excellent thermal performance up to 3A of output current. The PWM regulator switches at a default frequency of 500kHz and it can be user programmed or synchronized from 300kHz to 2MHz. The ISL78208 utilizes peak current mode control to provide flexibility in component selection and minimize solution size. The protection features include overcurrent, UVLO and thermal overload protection.

The ISL78208 is available in 5mmx5mm 32 Ld Wettable Flank Quad Flat Pb-free (WFQFN) package.

The ISL78208 is rated for the automotive temperature range (-40°C to +105°C).

KEY FEATURES

  • Wide input voltage range from 4.5V to 28V
  • Adjustable output voltage with continuous output current up to 3A
  • Current mode control
  • Adjustable switching frequency from 300kHz to 2MHz
  • Independent power-good detection
  • Selectable In-phase or out-of-phase PWM operation
  • Independent, sequential, ratiometric or absolute tracking between outputs
  • Internal 2ms soft-start time
  • Overcurrent/short circuit protection, thermal overload protection, UVLO
  • Boot undervoltage detection
  • Qualified for automotive applications
  • Pb-Free (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL78208
Basic Information
生产状态
Mass Production
拓扑
Buck
输出数量
2
输入电压最小值 (V)
4.5
输入电压最大值 (V)
28
输出电压最小值 (V)
0.8
输出电压最大值 (V)
26
输出电流最大值 (A)
3
IQ
1.2 mA
开关频率 (最大值) (MHz)
2
开关频率 (最小值) (MHz)
0.3
最大占空比 (%)
See Datasheet
资质级别
Automotive
峰值效率 (%)
92
POR
Yes
SYNCH功能
Yes
控制类型
Current Mode
开关频率范围 (MHz)
0.3 to 2.0
CAN 采样
YES
温度范围
-40 to +105

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