ISL6522A Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) Controller

VIN (min) (V)	25
VIN (max) (V)	12
VOUT (min) (V)	0.8
VOUT (max) (V)	VIN
IOUT (max) (A)	25
VBIAS (V)	12

The ISL6522A 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 ISL6522A integrates all of the control, output adjustment, monitoring and protection functions into a single package.

The output voltage of the converter can be precisely regulated to as low as 0.8V, with a maximum tolerance of ±0.5% over temperature and line voltage variations.

The ISL6522A 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 0–100%.

The ISL6522A protects against overcurrent conditions by inhibiting PWM operation. The ISL6522A monitors the current by using the rDS(ON) of the upper MOSFET which eliminates the need for a current sensing resistor.

ISL6522A 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 0–100% duty ratio
Excellent output voltage regulation
- 0.8V internal reference
- ±0.5% over line voltage and temperature
Overcurrent fault monitor
- Does not require extra current sensing element
- Uses MOSFETs rDS(ON)
Converter can source and sink current
Small converter size
- Constant frequency operation
- 200kHz free-running oscillator programmable from 50kHz to over 1MHz
16 Lead 5x5mm QFN Package
QFN Package
- Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat No Leads-Product Outline.
- Near Chip-Scale Package Footprint; Improves PCB Efficiency and Thinner in Profile

ISL6522A 应用

Power supply for Pentium(R), Pentium Pro, PowerPC(R) and AlphaPCTM microprocessors
High-power 5V to 3.xV DC-DC regulators
Low-voltage distributed power supplies

ISL6522A 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 $
ISL6522ACBZ	Coming Soon	民用级	14 Ld SOIC	3
ISL6522ACBZ-T	Coming Soon	民用级	14 Ld SOIC T+R	3
ISL6522ACRZ	Coming Soon	民用级	16 Ld QFN	3
ISL6522ACRZ-T	Coming Soon	民用级	16 Ld QFN T+R	3
ISL6522ACB	停产	民用级	14 Ld SOIC	1	N/A
ISL6522ACB-T	停产	民用级	14 Ld SOIC T+R	1	N/A
ISL6522ACR	停产	民用级	16 Ld QFN	1	N/A
ISL6522ACR-T	停产	民用级	16 Ld QFN T+R	1	N/A