ISL6443A 300kHz Dual, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller

VIN (min) (V)	4.5
VIN (max) (V)	24
VOUT (min) (V)	0.8
VOUT (max) (V)	24
IOUT (max) (A)	10

The ISL6443A is a high-performance, triple-output controller optimized for converting wall adapter, battery or network intermediate bus DC input supplies into the system supply voltages required for a wide variety of applications. Each output is adjustable down to 0.8V. The two PWMs are synchronized at 180° out of phase, thus reducing the RMS input current and ripple voltage.

The ISL6443A incorporates several protection features. An adjustable overcurrent protection circuit monitors the output current by sensing the voltage drop across the lower MOSFET. Hiccup mode overcurrent operation protects the DC/DC components from damage during output overload/short circuit conditions. Each PWM has an independent logic-level shutdown input (SD1SD1 and SD2).

A single PGOOD signal is issued when soft-start is complete on both PWM controllers and their outputs are within 10% of the set point and the linear regulator output is greater than 75% of its setpoint. Thermal shutdown circuitry turns off the device if the junction temperature exceeds +150°C.

ISL6443A 特点

Wide Input Supply Voltage Range
- Variable 5.6V to 24V
- Fixed 4.5V to 5.6V
Three Independently Programmable Output Voltages
Switching Frequency 300kHz
Out of Phase PWM Controller Operation
- Reduces Required Input Capacitance and Power Supply Induced Loads
No External Current Sense Resistor
- Uses Lower MOSFET's rDS(ON)
Bidirectional Frequency Synchronization for Synchronizing Multiple ISL6443As
Programmable Soft-Start
Extensive Circuit Protection Functions
- PGOOD
- UVLO
- Overcurrent
- Over-temperature
- Independent Shutdown for Both PWMs
Excellent Dynamic Response
- Voltage Feed-Forward with Current Mode Control
QFN Packages:
- QFN - Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Package Outline
- Near Chip Scale Package Footprint, which Improves PCB Efficiency and has a Thinner Profile
Pb-Free (RoHS Compliant)

ISL6443A 应用

Power Supplies with Multiple Outputs
xDSL Modems/Routers
DSP, ASIC, and FPGA Power Supplies
Set-Top Boxes
Dual Output Supplies for DSP, Memory, Logic, μP Core and I/O
Telecom Systems

ISL6443A 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 $
ISL6443AEVAL2Z	量产		评估板	N/A	价格录入中
ISL6443AIRZ	量产	工业级	28 Ld QFN	3	2.24
ISL6443AIRZ-TK	量产	工业级	28 Ld QFN T+R	3	2.26
ISL6443AIVZ	量产	工业级	28 Ld TSSOP	3	2.28
ISL6443AIVZ-TK	量产	工业级	28 Ld TSSOP T+R	3	2.29