ISL62381 High-Efficiency, Quad-Output System Power Supply Controller for Notebook Computers

VIN (min) (V)	5.5
VIN (max) (V)	25
VOUT (min) (V)	0.6
VOUT (max) (V)	5.5
IOUT (max) (A)	20

The ISL62381, ISL62382, ISL62383 family of controllers generate supply voltages for battery-powered systems. The ISL62381 and ISL62382 include two pulse-width modulation (PWM) controllers, adjustable from 0.6V to 5.5V, and two linear regulators, LDO5 and LDO3, that generate a fixed 5V and an adjustable output respectively, and each can deliver up to 100mA. The ISL62383 has the same outputs as the ISL62381 and ISL62382, but without LDO3 linear regulator. The channel 2 switching regulator will automatically take over the LDO5 load when programmed to 5V output. This provides a large power savings and boosts efficiency. The ISL62381, ISL62382, ISL62383 family include on-board power-up sequencing, two power-good (PGOOD) outputs, digital soft-start, and internal soft-stop output discharge that prevent negative voltages on shutdown.

The patented R3 PWM control scheme provides a low jitter system with fast response to load transients. Light-load efficiency is improved with period-stretching discontinuous conduction mode (DCM) operation. To eliminate noise in audio frequency applications, an ultrasonic DCM mode is included, which limits the minimum switching frequency to approximately 28kHz.

The ISL62381, ISL62382, is available in 32 Ld 5x5 TQFN package, and ISL62383 is available in 28 Ld 4x4 TQFN package. ISL62381, ISL62382, ISL62383 family can operate over the extended temperature range (-10°C to +100°C).

ISL62381 特点

High Performance R3 Technology
Fast Transient Response
±1% Output Voltage Accuracy: -10°C to +100°C
Two Fully Programmable Switch-Mode Power Supplies with Independent Operation
Programmable Switching Frequency
Integrated MOSFET Drivers and Bootstrap Diode
Adjustable (+1.2V to +5V) LDO Output
Fixed +5V LDO Output with Automatic Switchover to SMPS2
Internal Soft-Start and Soft-Stop Output Discharge
Wide input voltage Range: +5.5V to +25V
Full and Ultrasonic Pulse-Skipping Mode
Power-Good Indicator
Overvoltage, Undervoltage and Overcurrent Protection
Fault Identification by PGOOD Pull-Down Resistance
Thermal Monitor and Protection
Pb-Free (RoHS Compliant)

ISL62381 应用

Notebook and Sub-Notebook Computers
PDAs and Mobile Communication Devices
3-Cell and 4-Cell Li+ Battery-Powered Devices
General Purpose Switching Buck Regulators

ISL62381 芯片订购指南

芯片型号	产品状态	温度范围	封装尺寸图	潮湿敏感度等级MSL	美元价格US $
ISL62381HIEVAL1Z	量产		评估板	N/A	价格录入中
ISL62381HRTZ	量产	Hi-Temp Comm	28 Ld TQFN	1	2.87
ISL62381HRTZ-T	量产	Hi-Temp Comm	28 Ld TQFN T+R	1	2.87
ISL62381LOEVAL1Z	量产		评估板	N/A	价格录入中