LM5115SD

• Self-synchronous master channel output
• Independent DC/DC synchronous buck mode
• Leading edge pulse width modulation
• Injection current and input line voltage feedforward voltage mode control
• Input from AC or DC to 75V
• 4.5V to 30V bias supply voltage range
• Wide 0.75V to 13.5V output range.
• Sinking 2.5A peak of the top and bottom gate drivers
• Adaptive gate driver dead time control
• Wide bandwidth error amplifier at 4MHz
• Programmable soft-start
• Thermal shutdown protection
• Available in TSSOP-16 or thermally enhanced LLP-16 packages

illustrate

The LM5115 is a versatile switching regulator controller. It has two main application configurations. The first is to implement multiple output power converters using the "Postal Regulation" (SSPR) technology on the secondary side. In the second configuration, it can be used as a stand-alone synchronous buck controller (see page 14 for more details). SSPR technology develops efficient and well-regulated auxiliary output waveforms for a power converter isolated from the secondary side. The auxiliary output voltage is regulated through pulse-width modulation (PWM) of the leading-edge main channel duty cycle. Leading edge modulation is compatible with either current mode or voltage mode control of the main output. The LM5115 driver's external high-side and low-side NMOS power switches are configured as synchronous buck regulators. The current-sense amplifier provides overload protection over a wide common-mode input range. Other features include a low dropout (LDO) regulator, bias regulator, error amplifier, high-precision reference, gate signal for adaptive dead-time control, and thermal shutdown.