Datasheet Texas Instruments LM3495MTCX — 数据表

LM3495
www.ti.com SNVS410F – FEBRUARY 2006 – REVISED APRIL 2013 LM3495 Emulated Peak Current Mode Buck Controller for Low Output Voltage
Check for Samples: LM3495 FEATURES DESCRIPTION The LM3495 is a PWM buck regulator which
implements a unique emulated peak current mode
control. This control method eliminates the switching
noise which typically limits current mode operation at
extremely short duty cycles and high operating
frequency. The switching frequency is programmable
between 200 kHz and 1.5 MHz, and can also be
synchronized to an external clock. The LM3495 is
also very fault tolerant with both switch node short,
hiccup mode, and adaptive duty cycle limit protection.
A 0.6V 1% reference and glitch free pre-biased startup ensure the most demanding digital loads operate
reliably. Internal soft start and the ability to track the
output of another supply make the LM3495 versatile
and efficient. 1 2 Input Voltage from 2.9V to 18V
Output Voltage Adjustable from 0.6V to 5.5V
Feedback Accuracy: В±1%
Low-Side Sensing, Programmable Current
Limit without Sense Resistor
Input Under Voltage Lockout
Hiccup Mode Current Limit Protection
Eliminates Thermal Runaway During Fault …