1FEATURES
23· 2.25-V to 5.5-V Input
· Output Voltage from 0.6 V to 90% of VIN
· High-Side Drive for N-Channel FET
· Supports Pre-Biased Outputs
· Adaptive Anti-Cross Conduction Gate Drive
· 1%, 0.6-V Reference
· Two Fixed Switching Frequency Versions,
TPS40040 (300 kHz) and TPS40041 (600 kHz)
· Three Selectable Short Circuit Protection
Levels of 105 mV, 180 mV and 310 mV
· Hiccup Restart from Faults
· Voltage Mode Control
· Active Low Enable
· Thermal Shutdown Protection at 145C
· 8-Pin, 3-mm x 3-mm SON with Ground
Connection to Thermal Pad

APPLICATIONS
· Point of Load
· Telecommunications
· DC to DC Modules
· Set Top Boxes

CONTENTS
Device Ratings 2
Electrical Characteristics 3
Device Information 8
Application Information 10
Design Examples 19
Additional References 32

DESCRIPTION
The TPS40040 and TPS40041 dc-to-dc controllers
are designed to operate from a 2.25-V to 5.5-V input
source. To reduce the number of external
components, several operating parameters are fixed
internally; namely, frequency, soft start time, and
short circuit protection (SCP) levels. For example, the
operating frequencies of TPS40040/1 are 300
kHz/600 kHz, respectively.