Коммутационные контроллеры TPS51120RHBTG4

DC/DC контроллер , 4.5В до 28В, 2 выхода, синхронный понижающий, 580кГц, VQFN-32

The TPS51120RHBTG4 is a Dual Current Mode Synchronous Step-down Controller with 100mA standby reg for notebook system power. It is a full featured controller designed to run directly off a three- or four-cell Li-ion battery and provide high-power and 5 and/or 3.3V standby regulation for all the downstream circuitry in a notebook computer system. High-current 100mA, 5 or 3.3V on-board linear regulators have glitch-free switch over function to SMPS and can be kept alive independently during standby state. The pseudo-constant frequency adaptive on-time control scheme supports full range of current mode operation including simplified loop compensation, ceramic output capacitors as well as seamless transition to reduced frequency operation at light-load condition. Optional D-CAP mode operation optimized for SP-CAP or POSCAP output capacitors allows further reduction of external compensation parts. Dynamic UVP supports VIN line sag without latch off by hitting 5-V UVP.

• 3.3 and 5V 100mA Bootstrapped standby regulators with independent enables
• Selectable D-CAP™ mode enables fast transient response less than 100ns
• Selectable low ripple current mode
• Less than 1% internal reference accuracy
• Selectable PWM-only/auto-skip modes
• Low-side RDS (ON) loss-less current sensing
• RSENSE accurate current sense option
• Internal soft-start and integrated VOUT discharge transistors
• Integrated 2V reference
• Adaptive gate drivers with integrated boost diode

• Power-Good for each channel with delay timer
• Fault disable mode
• Green product and no Sb/Br

Области применения

Компьютеры и Периферия, Переносные Устройства