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News
18V, 5A Monolithic Synchronous Buck-Boost DC/DC Converter Delivers 95% Efficiency
2016-11-05 | ReturnThe LTC3119 includes four internal low RDSON N-channel MOSFETs to deliver efficiencies of up to 95%. Burst Mode operation can be disabled, offering low noise continuous switching. External frequency programming or synchronization using an internal PLL enables operation over a wide switching frequency range of 400kHz to 2MHz, which allows for a tradeoff between efficiency and solution size. Other features include short-circuit protection, thermal overload protection, less than 3μA shutdown current, and a power good indicator. The device’s combination of tiny externals, wide operating voltage range, compact packaging, plus low quiescent current makes the LTC3119 well suited for RF power supplies, high current pulsed load applications, system backup power supplies, and lead-acid battery to 12V conversion systems.
The LTC3119 is available in thermally enhanced 28-lead 4mm x 5mm QFN and 28-lead TSSOP packages. E- and I-grade devices are specified over the –40°C to 125°C operating temperature range, H-grade from –40°C to 150°C, and MP-grade from –55°C to 150°C. E-grade pricing starts at $7.15 each in 1,000-piece quantities for both packages. All versions are available from stock. For more information, visit www.linear.com/product/LTC3119.
Summary of Features: LTC3119
1. Input Voltage Range: 2.5V to 18V
2. Runs Down to VIN = 250mV After Start-Up
3. Output Voltage Range: 0.8V to 18V
4. 5A Output Current in Buck Mode, VIN > 6V
5. 3A Output Current for VIN = 3.6V, VOUT = 5V
6. Programmable Switching Frequency: 400kHz to 2MHz
7. Synchronizable with an External Clock Up to 2MHz
8. Accurate Run Comparator Threshold
9. Burst Mode® Operation, No-Load IQ = 35μA
10. Ultralow Noise Buck-Boost PWM
11. Current Mode Control
12. Maximum Power Point Control
13. Power Good Indicator
14. Internal Soft-Start
15. 28-Lead 4mm × 5mm QFN and 28-Lead TSSOP Packages
Pricing shown is for budgetary use only and may differ due to local duties, taxes, fees and exchange rates.
Source:http://www.linear.com/