ISL6525 Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) Controller

VIN (min) (V)	25
VIN (max) (V)	12
VOUT (min) (V)	1.2
VOUT (max) (V)	VIN
IOUT (max) (A)	25
VBIAS (V)	12

The ISL6525 provides complete control and protection for a DC-DC converter optimized for high-performance microprocessor applications. It is designed to drive two N Channel MOSFETs in a synchronous-rectified buck topology. The ISL6525 integrates all of the control, output adjustment, monitoring and protection functions into a single package. A programmable delay time for the PGOOD signal makes it especially suitable for the VTT regulation in VRM8.5 applications. The output voltage of the converter can be precisely regulated to as low as 1.20V, with a maximum tolerance of ±1% over temperature and line voltage variations.

The ISL6525 provides simple, single feedback loop, voltage-mode control with fast transient response. It includes a 200kHz free-running triangle-wave oscillator that is adjustable from below 50kHz to over 1MHz. The error amplifier features a 15MHz gain-bandwidth product and 6V/us slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty ratio ranges from 0% to 100%.

The ISL6525 protects against over-current conditions by inhibiting PWM operation. The ISL6525 monitors the current by using the rDS(ON) of the upper MOSFET which eliminates the need for a current sensing resistor

ISL6525 特点

Drives Two N-Channel MOSFETs
Operates From +5V or +12V Input
Simple Single-Loop Control Design
- Voltage-Mode PWM Control
Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Ratio
Excellent Output Voltage Regulation
- 1.20V Internal Reference
- ±1% Over Line Voltage and Temperature
Programmable delay for PGOOD signal
Over-Current Fault Monitor
- Does Not Require Extra Current Sensing Element
- Uses MOSFETs rDS(ON)
Small Converter Size
- Constant Frequency Operation
- 200kHz Free-Running Oscillator Programmable from 50kHz to Over 1MHz
14 Pin, SOIC Package
Pb-Free Available (RoHS Compliant)

ISL6525 应用

Power Supply for Various Microprocessors
VTT Regulation for VRM8.5
High-Power 5V to 3.xV DC-DC Regulators
Low-Voltage Distributed Power Supplies

ISL6525 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 $
ISL6525CBZ	量产	民用级	14 Ld SOIC	3
ISL6525CBZ-T	量产	民用级	14 Ld SOIC T+R	3
ISL6525EV1	Coming Soon			N/A
ISL6525CB	停产	民用级	14 Ld SOIC	1	N/A
ISL6525CB-T	To Be Discontinued	民用级	14 Ld SOIC T+R	1