Dual Output Controller with 1A Standard Buck PWM and LDO
# of Outputs
2
VIN (min) (V)
5
VIN (max) (V)
25
VOUT (min) (V)
.6
VOUT (max) (V)
22
IOUT (max) (A)
1
I(LDO1) (max) (A)
.5
Switching Frequency (MHz)
.5
Peak Efficiency (%)
95
Product Information
Key Features
Standard Buck Controller with Integrated Switching Power MOSFET + 1 LDO
Integrated Boot Diode
Input Voltage Range
Fixed 5V ±10%
Variable 5.5V to 25V
PWM Output Voltage Adjustable from 0.6V to 20V with Continuous Output Current up to 1A
Voltage Mode Control with Voltage Feed Forward
Fixed 500kHz Switching Frequency
Externally Adjustable Soft-Start Time
Output Undervoltage Protection
LDO Adjustable Options
LDO, 0.6V to 4.2V 500mA
Individual Enable Inputs
Two PGOOD Outputs (PWM and LDO)
Overcurrent Protection
Thermal Overload Protection
Internal 5V LDO regulator
Pb-Free (RoHS Compliant)
Description
The ISL8510 is a high-performance, dual output controller that provides a single, high frequency power solution for a variety of point of load applications. The ISL8510 integrates a 1A standard buck PWM controller and switching MOSFET with one 500mA LDO.
The PWM controller in the ISL8510 drives an internal switching N-Channel power MOSFET and requires an external Schottky diode to generate an output voltage from 0.6V to 20V. The integrated power switch is optimized for excellent thermal performance up to 1A of output current. The standard buck input voltage range supports a fixed 5V or variable 5.5V to 25V range. The PWM regulator switches at a fixed frequency of 500kHz and utilizes simple voltage mode control with input voltage feed forward to provide flexibility in component selection and minimize solution size. Protection features include overcurrent, undervoltage, and thermal overload protection integrated into the IC. The ISL8510 power-good signal output indicates loss of regulation on the PWM output.
The ISL8510 features one adjustable LDO regulator using internal PMOS transistors as pass devices. The enable pin (EN_LDO) controls the LDO output. A single power-good signal output indicates loss of regulation on the LDO output. Independent overcurrent and thermal fault shutdown monitors are integrated into the "LDO Regulator Capacitor Selection" on page 16.
The ISL8510 is available in a small 4mmx4mm Quad Flat No Lead (QFN) package.
The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.
MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020
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