TPS51123RGER ,Dual-Synch Step-Down Controller w/Out-of-Audio Operation 100mA LDO f/Notebook Sys Pwr 24-VQFN -40 to 85FEATURES APPLICATIONS2• Wide-Input Voltage Range: 5.5 V to 28 V • Notebook Computers• Output Voltag ..
TPS51124 ,Dual, Synchronous Step Down Controller for Low Voltage System PowerBlock Diagram... 10Information..... 207.3 Feature Description.... 114 Revision HistoryChanges from ..
TPS51124RGER ,Dual, Synchronous Step Down Controller for Low Voltage System Power 24-VQFN -40 to 85Sample & Support &Product Tools &TechnicalCommunityBuyFolder Documents SoftwareTPS51124SLVS616C–NOV ..
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TPS51123RGER
Dual-Synchronous, Step-Down Controller w/ Out-of-Audio Operation, 100-mA LDOs for Notebook Sys. Pwr
VO1
PGOOD
VO2
VREG3
TPS51123RGE
(QFN-24)
LL1
DRVL1
DRVL2 14 15 16 17 18 5 4 3 2 1
PowerPAD
220nFkW 20kW 30kW
100kW
VREG5
0.1mF
130kW130kW
3.3mF
330mF
VO1
VIN
VREG5
VIN
10mFx2
VIN
5.5VV
0.1mFmFx2
13kW
UDG-08167
VIN
TPS51123
www.ti.com SLUS890E –DECEMBER 2008–REVISED JANUARY 2013
Dual-Synchronous, Step-Down Controller with Out-of-Audio™ Operation and 100-mA
LDOs for Notebook System Power
Checkfor Samples: TPS51123
1FEATURES APPLICATIONS Wide-Input Voltage Range: 5.5Vto28V • Notebook Computers Output Voltage Range:2Vto 5.5V • I/O Supplies Built-in 100-mA 5-V/3.3-V LDO with Switches • System Power Supplies Built-in 1% 2-V Reference Output DESCRIPTION• With/Without Out-of-Audio™ Mode Selectable The TPS51123isa cost effective, dual-synchronous
Light-Load and PWM only Operation buck controller targeted for notebook system power
• Internal 1.6-ms Voltage Servo Softstart supply solutions.It provides 5-V and 3.3-V LDOs and
Adaptive On-Time Control Architecture with requires few external components. The TPS51123
supports high efficiency, fast transient responses and
Four Selectable Frequency Settingprovidesa combined power-good signal. Out-of-
• 4500 ppm/°C RDS(on) Current Sensing Audio™ mode light-load operation enables low
• Built-In Output Discharge acoustic noise at much higher efficiency than
Power Good Output conventional forced PWM operation. Adaptive on-
time D-CAP™ control provides convenient and
• Built-in OVP/UVP/OCP efficient operation. The part operates with supply
• Thermal Shutdown (Non-latch) input voltages ranging from 5.5V to 28V and
24-Pin QFN (RGE) Package supports output voltages from2Vto 5.5 V. The
TPS51123is availableina 24-pin QFN package and specified from -40°Cto 85°C ambient temperature
range.