ISL8105B +5V or +12V Single-Phase Synchronous Buck Converter PWM Controller with Integrated MOSFET Gate Drivers, Extended Soft-Start Time

VIN (min) (V)	1
VIN (max) (V)	12
VOUT (min) (V)	0.6
VOUT (max) (V)	5
IOUT (max) (A)	25

The ISL8105B is a simple single-phase PWM controller for a synchronous buck converter. It operates from +5V or +12V bias supply voltage. With integrated linear regulator, boot diode, and N-Channel MOSFET gate drivers, the ISL8105B reduces external component count and board space requirements. These make the IC suitable for a wide range of applications.

Utilizing voltage-mode control, the output voltage can be precisely regulated to as low as 0.6V. The 0.6V internal reference features a maximum tolerance of ±1.0% over the commercial temperature range, and ±1.5% over the industrial temperature range. The controller operates with a fixed switching frequency of 300kHz.

The ISL8105B features the capability of safe start-up with pre-biased load. It also provides overcurrent protection by monitoring the ON-resistance of the bottom-side MOSFET to inhibit PWM operation appropriately. During start-up interval, the resistor connected to BGATE/BSOC pin is employed to program overcurrent protection condition. This approach simplifies the implementation and does not deteriorate converter efficiency.

ISL8105B 特点

Operates from +5V or +12V Bias Supply Voltage
- 1.0V to 12V Input Voltage Range (up to 20V possible with restrictions; see Input Voltage Considerations)
- 0.6V to VIN Output Voltage Range
0.6V Internal Reference Voltage
- ±1.0% Tolerance Over the Commercial Temperature Range (0°C to +70°C)
- ±1.5% Tolerance Over the Industrial Temperature Range (-40°C to +85°C).
Integrated MOSFET Gate Drivers that Operate from VBIAS (+5V to +12V)
- Bootstrapped High-side Gate Driver with Integrated Boot Diode
- Drives N-Channel MOSFETs
Simple Voltage-Mode PWM Control
- Traditional Dual Edge Modulation
Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Cycle
Fixed 300kHz Operating Frequency
Fixed Internal Soft-Start with Pre-biased Load Capability
Lossless, Programmable Overcurrent Protection
- Uses Bottom-side MOSFET's rDS(ON)
Enable/Disable Function Using COMP/EN Pin
Output Current Sourcing and Sinking Currents
Pb-Free Plus Anneal Available (RoHS Compliant)

ISL8105B 应用

5V or 12V DC/DC Regulators
Industrial Power Systems
Telecom and Datacom Applications
Test and Measurement Instruments
Distributed DC/DC Power Architecture
Point of Load Modules

ISL8105B 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 $
ISL8105BCBZ	量产	民用级	8 Ld SOIC	1	0.89
ISL8105BCBZ-T	量产	民用级	8 Ld SOIC T+R	1	0.89
ISL8105BCRZ	量产	民用级	10 Ld DFN	1	0.95
ISL8105BCRZ-T	量产	民用级	10 Ld DFN T+R	1	0.95
ISL8105BEVAL1Z	量产		评估板	N/A	价格录入中
ISL8105BEVAL2Z	量产		评估板	N/A	价格录入中
ISL8105BIBZ	量产	工业级	8 Ld SOIC	1	1.17
ISL8105BIBZ-T	量产	工业级	8 Ld SOIC T+R	1	1.17
ISL8105BIRZ	量产	工业级	10 Ld DFN	1	1.22
ISL8105BIRZ-T	量产	工业级	10 Ld DFN T+R	1	1.22