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TMI3492
36V Wide Input Range 2A Step-Down Synchronous
DC/DC Converter
FEATURES
⚫ P-MOS+N-MOS Switch Structure
⚫ Wide Input Voltage: 4.2V to 36V
⚫ Quiescent Current Iq=1mA Typical
⚫ High Efficiency up to 93%@12V
IN
to 5V/2A
⚫ 2A Output Current
⚫ PFM in Light Load Condition
⚫ 75kHz to 600kHz Adjustable Switching Frequency
⚫ Internal Compensation
⚫ Hiccup Output Short Current Protection
⚫ 1.22V Feedback Voltage
⚫ Integrated Soft Start
⚫ Thermal Shutdown
⚫ Duty Cycle up to 100%
⚫ Low BOM Cost
⚫ SOP8 Package
GENERAL DESCRIPTION
TMI3492 is a wide input voltage, high efficiency 2A
synchronous rectified step-down converter. The
TMI3492 operates at high efficiency over a wide output
current load range. TMI3492 provides up to total 2A
output current at 5V output. Switching frequency can
be set by external resistor. Maximum 100% duty cycle
could be obtained. TMI3492 internal integrate 120mΩ
high side and 50mΩ low side power MOSFET.
Advanced production features include UVLO, Thermal
Shutdown, Soft Start and input OVP.
APPLICATIONS
⚫ Automotive Equipment
⚫ Car Charger/ Adaptor
⚫ Rechargeable Portable Devices
⚫ General-Purpose DC/DC Supply
TYPICAL APPILCATION
TMI3492
OFF
ON
EN
V36=4.2V~
IN
V
Fμ0.1
Fμ0.1
Ωk100
Ω.4k32
FSW
VOUT=5V
nF1
Fμ220
Fμ100
Hμ33
GND
FB
SW
IN
Figure 1. Basic Application Circuit with 120kHz Switching Frequency