UCD7231RTJR ,Digital Control Compatible Synchronous Buck Gate Driver with Current Sense and Fault Protection 20-QFN -40 to 125FEATURESDESCRIPTION• Dual High Current Drivers.• Full Compatibility with TI Fusion Digital Power Th ..
UCD7232RTJR ,Digital Control Compatible Synchronous-Buck Gate Driver with Current Sense and Fault Protection 20-QFN -40 to 125FEATURESDESCRIPTION• Dual High Current Drivers.The UCD7232 high current driver is specifically• Ful ..
UCD7242 ,Digital Dual Synchronous Buck Power Drivermaximum ratings may cause permanent damage to the device. These are stress ratingsonly and function ..
UCD7242MRSJREP ,Digital Dual Synchronous-Buck Power Driver, UCD7242-EP 32-VQFN-HR -55 to 125maximum ratings may cause permanent damage to the device. These are stress ratingsonly and function ..
UCD7242RSJR ,Digital Dual Synchronous Buck Power Driver 32-VQFN-HR -40 to 125MAXIMUM RATINGSover operating free-air temperature range (unless otherwise noted)PARAMETER RATING V ..
UCD7242RSJT ,Digital Dual Synchronous Buck Power Driver 32-VQFN-HR -40 to 125These devices have limited built-in ESD protection. The leads should be shorted together or the dev ..
UPC1100 ,DUAL SWITCHING REGULATOR CONTROL CIRCUIT4 DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUITS
MPC1100,MPC1150
DUAL SWITCHING REGULATOR CON ..
UPC1100C ,DUAL SWITCHING REGULATOR CONTROL CIRCUITapplications.
Document No. |042122A
(O.D.No. '047542)
Date Published April 1994 M .
Printed ..
UPC1100GS ,DUAL SWITCHING REGULATOR CONTROL CIRCUITapplications.
Document No. |042122A
(O.D.No. '047542)
Date Published April 1994 M .
Printed ..
UPC1100GS-E1 ,Switching regulatorapplications.
Document No. |042122A
(O.D.No. '047542)
Date Published April 1994 M .
Printed ..
UPC1100GS-T1 ,Switching regulatorapplications. Two |Cs are available in accordance with short protection method.
FEATU RES
Two ..
UPC1150C ,DUAL SWITCHING REGULATOR CONTROL CIRCUITapplications. Two |Cs are available in accordance with short protection method.
FEATU RES
Two ..
UCD7231RTJR
Digital Control Compatible Synchronous Buck Gate Driver with Current Sense and Fault Protection
UCD7231
www.ti.com SLUS997 –NOVEMBER 2009–REVISED JANUARY 2010
Digital Control Compatible Synchronous-Buck Gate Driver
With Current Sense and Fault Protection
Checkfor Samples: UCD7231
1FEATURES
DESCRIPTION• Dual High Current Drivers. Full Compatibility withTI Fusion Digital Power The UCD7231 high current driver is specifically
designed for digitally-controlled, point-of-load,
Supply Controllers, suchas UCD91xx andsynchronous buck switching power supplies. Two
UCD92xx Families driver circuits provide high charge and discharge
• Operationalto2 MHz Switching Frequency current for the high-side NMOS switch and the
• High-Side FET and Output Current Limit low-side NMOS synchronous rectifier in a
Protection with Independently Adjustable synchronous buck circuit. The MOSFET gates are
Thresholds drivento +6V byan internally regulated VGG supply.
The internal VGG regulator can be disabledto permit
• Fast High-Side Over-Current Sense Circuit the userto supply their own gate drive voltage. This
with Fault Flag Output– Prevents Catastrophic flexibility allowsa wide power conversion input
Current Levels ona Cycle by Cycle Basis voltage rangeof 2.2to 15V. Internal under voltage
• Differential High-Gain Current Sense Amplifier lockout (UVLO) logic insures VGGis good before
allowing chip operation.
• Voltage Proportionalto Load Current Monitor
Output A drive logic block allows operationin oneof two
Wide Input Voltage Range: 4.7Vto15V modes selected by the SRE Mode pin. In
Synchronous Mode, the logic block uses the PWM
Operationto 2.2V Input Supported with an signalto control both the high-side and low-side gate
External 4.5-6.5V Bias Supply drive signals. Dead timeis automatically adjustedto
• Onboard Regulated Supplies for Gate Drive prevent cross conduction. The Synchronous Rectifier
and Internal Circuits Enable (SRE) pin controls whetheror not the low-side
Integrated Thermal Shutdown FETis turned on when the PWM signalis low.In
Independent Mode, the PWM and SRE pins control
• Selectable Operation Modes: the high-side and low-side gates directly. No
– PWM plus Synchronous Rectifier Enable anti-cross-conduction logicis usedin this mode.
(SRE) with Automatic Dead-Time ControlOn-board comparators monitor the voltage across the
– Direct High-Gate and Low-Gate Inputs for high side switch and the voltage across an external
Direct FET Control current sense elementto safeguard the power stage
• 3-State PWM Input for Power Stage Shutdown from sudden high current loads. Blanking delayis set
for the high side comparator bya single resistorin
• UVLO Housekeeping Circuitorderto avoid false reports coincident with switching
• Rated from –40°Cto +125°C Junction edge noise.In the eventofa high-side faultor an
Temperature over-current fault, the high-side FET turned off and
• Pb (Lead) Free Packaging the Fault Flag (FLT)is assertedto alert the digital
controller. The fault thresholds are independently set
APPLICATIONS by the HS Sense and ILIM pins.
Digitally-Controlled Synchronous-Buck Power Output currentis measured and monitored bya
Stages for Single- and Multi-Phase precision, high gain, switched capacitor differential
Applications amplifier that processes the voltage present across
Digitally-Controlled Power Modules an external current sense element. The amplified
signalis available for use by the digital controller on
the IMON pin. The current sense amplifier has output
offsetof 0.5V so that both positive (sourcing) and
negative (sinking) current canbe sensed.
Not Recommended for New Designs
