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News
42V Quad Output, Triple Monolithic Synchronous Buck Converter &Boost Controller Operates from 3V to 42V Inputs
2018-02-26 | ReturnThe LT8603’s triple buck synchronous rectification topology delivers up to 93% efficiency while Burst Mode? operation keeps quiescent current under 28μA (high voltage channels active) in no-load standby conditions, ideal for always-on systems. For noise-sensitive applications, the LT8603’s low EMI design meets the CISPR 25, Class 5 EMI requirements even when switching at 2MHz. The LT8603’s switching frequency can be programmed from 250kHz to 2.2MHz and is synchronizable throughout this range.
The LT8603’s 85ns (max) minimum on-time and cascading topology enables 16VIN to 0.8VOUT step-down conversions while switching at 2MHz, enabling designers to avoid critical noise-sensitive frequency bands such as AM radio, while using a very compact solution footprint. Its 3V to 42V input voltage range is ideal for automotive applications that must regulate through cold crank and stop-start scenarios with minimum input voltages as low as 3V and load dump transients in excess of 40V. Programmable power-on reset and power good indicators for each channel ensure overall system reliability. The LT8603’s 40-lead thermally enhanced 6mm x 6mm QFN package and high switching frequency keep external inductors and capacitors small, providing a compact, thermally efficient footprint.
The LT8603 is available in a thermally enhanced 40-lead 6mm x 6mm QFN package. Two temperature grades are available, with operation from –40°C to 125°C (junction) for the extended E- and industrial I-grades. All versions are available from stock.
Summary of Features: LT8603
。Flexible Power Supply System Capable of Four Regulated Outputs with VBATT << VOUT
。Two High Voltage Synchronous Buck Regulators
.3V to 42V Input Voltage Range
.Output Currents Up to 2.5A and 1.5A
。 One Low Voltage Synchronous Buck Regulator
.2.6V to 5.5V Input Voltage Range
.Output Currents Up to 1.8A
。One Boost Controller Allows Buck Converters to Regulate with VBATT << VOUT
。Selectable Burst Mode? Operation Allows Low 28μA IQ
。Programmable Power-On Reset
。Individual Channel Power Good Indicators
。Step-Down Switching Frequency: 250kHz to 2.2MHz
。Available in 40-Lead QFN 6mm × 6mm Package
Pricing & Availability
Product |
Production Availability |
Price Each Per 1,000 |
Package |
LT8603 |
Now |
Starts at $5.35 |
40-Lead QFN 6mm x6mm |
Source:http://www.linear.com/