ISL78208 Datasheet, PDF (1/25 Pages) Intersil Corporation – Wide VIN Dual Standard Buck Regulator with 3A/3A Continuous Output Current

Wide V_IN Dual Standard Buck Regulator with 3A/3A
Continuous Output Current
ISL78208
The ISL78208 is a dual standard buck regulator capable of 3A
per channel with continuous output current. With an input
range of 4.5V to 28V, it provides a high frequency power
solution for a variety of point of load applications.
The PWM controller in the ISL78208 drives an internal
switching N-Channel power MOSFET and requires an external
Schottky diode to generate the output voltage. The integrated
power switch is optimized for excellent thermal performance
up to 3A of output current. The PWM regulator switches at a
default frequency of 500kHz and it can be user programmed
or synchronized from 300kHz to 2MHz. The ISL78208 utilizes
peak current mode control to provide flexibility in component
selection and minimize solution size. The protection features
include overcurrent, UVLO and thermal overload protection.
The ISL78208 is available in 5mm x 5mm 32 Lead Wettable
Flank Quad Flat Pb-free (WFQFN) package.
The ISL78208 is both AEC - Q100 rated and fully TS16949
compliant. The ISL78208 is rated for the automotive
temperature range (-40°C to +105°C).
Features
• Wide input voltage range from 4.5V to 28V
• Adjustable output voltage with continuous output current up
to 3A
• Current mode control
• Adjustable switching frequency from 300kHz to 2MHz
• Independent power-good detection
• Selectable In-phase or out-of-phase PWM operation
• Independent, sequential, ratiometric or absolute tracking
between outputs
• Internal 2ms Soft-start time
• Overcurrent/short circuit protection, thermal overload
protection, UVLO
• Boot undervoltage detection
• TS16949 compliant
• AEC - Q100 tested
• Pb-Free (RoHS compliant)
Applications
• DSP and embedded processor power supply
• Infotainment system power
100
90
80
12V_OUT 1MHz
70
60
50
40
0.0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT LOAD (A)
FIGURE 1. EFFICIENCY vs LOAD, V_IN = 28V, T_A = +25°C
July 12, 2013
1
FN8354.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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