User manual

page 79
Analog System Lab Kit PRO
The TPS40200 is a exible non-synchronous
controller with a built in 200-mA driver for P-channel
FETs. The circuit operates with inputs up to 52V with
apower-savingfeaturethatturnsodrivercurrent
once the external FET has been fully turned on. This
featureextendstheexibilityofthedevice,allowing
it to operate with an input voltage up to 52V without
dissipating excessive power. The circuit operates
with voltage-mode feedback and has feed-forward
input-voltage compensation that responds instantly
to input voltage change. The internal 700mV
reference is trimmed to 1%, providing the means to
accurately control low voltages. The TPS40200 is
available in an 8-pin SOIC, and supports many of the
features of more complex controllers.
•InputVoltageRange4.5to52V
•OutputVoltage(700mVto90%VIN)
•200mAInternalP-ChannelFETDriver
•VoltageFeed-ForwardCompensation
•UndervoltageLockout
•ProgrammableFixedFrequency(35-500kHz)
Operation
•ProgrammableShortCircuitProtection
•HiccupOvercurrentFaultRecovery
•ProgrammableClosedLoopSoftStart
•IndustrialControl
•DSL/CableModems
•DistributedPowerSystems
•Scanners
•Telecom
http://www.ti.com/lit/gpn/tps40200
Wide-Input, Non-Synchronous Buck DC/DC Controller
appendix A
A.4.1 Features
A.4.3 Description
A.4.4 Download Datasheet
Figure A.4: TPS40200 - DC/DC Controller
A.4.2 Applications
TPS40200
•700mV1%ReferenceVoltage
•ExternalSynchronization
•Small8-PinSOIC(D)andQFN(DRB)Packages