ISL8002B

Compact Synchronous Buck Regulator

OVERVIEW

The ISL8002B is a highly efficient, monolithic, synchronous step-down DC/DC converter that can deliver up to 2A of continuous output current from a 2.7V to 5.5V input supply. It uses peak current mode control architecture to allow very low duty cycle operation. ISL8002B operates at a 2MHz switching frequency, thereby providing superior transient response and allowing for the use of a small inductor. ISL8002B also has excellent stability.

The ISL8002B integrates very low rDS(ON) MOSFETs in order to maximize efficiency. In addition, since the high-side MOSFET is a PMOS, the need for a boot capacitor is eliminated, thereby reducing external component count.

The device can be configured for either PFM (discontinuous conduction) or PWM (continuous conduction) operation at light load. PFM provides high efficiency by reducing switching losses at light loads and PWM for fast transient response, which helps reduce the output noise and RF interference.

The device is offered in a space saving 8 Ld 2mmx2mm TDFN Pb-free package with exposed pad for improved thermal performance. The complete converter occupies less than 64mm2 area.

KEY FEATURES

  • VIN range 2.7V to 5.5V
  • IOUT maximum is 2A
  • External soft-start programmable
  • Output tracking and sequencing
  • Switching frequency is 2MHz
  • Selectable PFM or PWM operation option
  • Overcurrent and short-circuit protection
  • Over-temperature/thermal protection
  • VIN undervoltage lockout and VOUT overvoltage protection
  • Up to 95% peak efficiency

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL8002B
Basic Information
生产状态
Mass Production
拓扑
Buck
输出数量
1
输入电压最小值 (V)
2.7
输入电压最大值 (V)
5.5
输出电压最小值 (V)
0.6
输出电压最大值 (V)
4
输出电流最大值 (A)
2
IQ
35 µA
开关频率 (最大值) (MHz)
2
开关频率 (最小值) (MHz)
2
最大占空比 (%)
75
资质级别
Standard
峰值效率 (%)
95
POR
Yes
BOM总占用面积 (mm2)
64
SYNCH功能
No
控制类型
Current Mode
开关频率范围 (MHz)
1.7 to 2.3 MHz
CAN 采样
YES
温度范围
-40 to +125

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