600kHz 18V 2A Synchronous COT Step-Down Converter
Features
⚫ 140mΩ/70mΩ Low R
DS(ON)
internal FETs
⚫ COT control to achieve fast transient
responses
⚫ High Efficiency Synchronous-Mode
Operation
⚫ Wide Input Range: 4.5V to 18V
⚫ Output Voltage from 0.6V
⚫ 600kHz Switch Frequency
⚫ Up to 2A Output Current
⚫ Power Save Mode at Light Load
⚫ Integrated internal compensation
⚫ Stable with Low ESR Ceramic Output
Capacitors
⚫ Over Current Protection with Hiccup Mode
⚫ Thermal Shutdown
⚫ Inrush Current Limit and Soft Start
⚫ Build in Input Over Voltage Protection
⚫ Available in SOT23-6 Package
Description
The TMI3252S2 is a high efficiency 600kHz,
Constant-on-Time (COT) control mode
synchronous step-down DC-DC converter capable
of delivering up to 2A current. TMI3252S2
integrates main switch and synchronous switch
with very low R
DS(ON)
to minimize the conduction
loss. Low output voltage ripple and small external
inductor and capacitor size are achieved with
600kHz switching frequency. It adopts the COT
architecture to achieve fast transient responses for
high voltage step down applications.
The TMI3252S2 requires a minimum number of
readily available standard external components
and is available in a 6-pin SOT23-6 ROHS
compliant package.
Application
⚫ Digital Set Top Boxes
⚫ Flat Panel Television and Monitors
⚫ Notebook computer
⚫ Wireless and DSL Modems
Typical Application