TPS51220ARSNR ,Fixed-Frequency, 99% Duty Cycle Peak Current-Mode Notebook System Pwr Controller 32-QFN -40 to 85Maximum Ratings may cause permanent damage to the device. These are stress ratingsonly and function ..
TPS51220ARSNT ,Fixed-Frequency, 99% Duty Cycle Peak Current-Mode Notebook System Pwr Controller 32-QFN -40 to 85FEATURES2• Input Voltage Range: 4.5 V to 32 V • Powergood Output for Each Channel• Output Voltage R ..
TPS51220ARTVR ,Fixed-Frequency, 99% Duty Cycle Peak Current-Mode Notebook System Pwr Controller 32-WQFN -40 to 85These devices have limited built-in ESD protection. The leads should be shorted together or the dev ..
TPS51220ARTVT ,Fixed-Frequency, 99% Duty Cycle Peak Current-Mode Notebook System Pwr Controller 32-WQFN -40 to 85BLOCK DIAGRAMVINENV5SW1.25V+ + + +4.7V/4.5V 4.7V/4.5VVREG5 VREG3GNDV5OK+4.2V/3.8VReady GND+THOK VRE ..
TPS51220RHBR ,Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller 32-VQFN -40 to 85maximum ratings may cause permanent damage to the device. These are stress ratingsonly and function ..
TPS51220RHBRG4 ,Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller 32-VQFN -40 to 85BLOCK DIAGRAMVINENV5SW1.25V4.7V/ 4.5V + + + + 4.7V/ 4.5VVREG5 VREG3GNDV5OK+4.2V/ 3.8VReady GND+THOK ..
TSC4505CX RF , High Voltage NPN Transistor
TSC5904CX RF , Low Vcesat NPN Transistor
TSC80251G1D-16CB , Extended 8-bit Microcontroller with Serial Communication
TSC80251G1D-16CB , Extended 8-bit Microcontroller with Serial Communication
TSC80251G1D-24CA , Extended 8-bit Microcontroller with Serial Communication
TSC80251G2D-16CB ,B/16-BIT MICROCONTROLLER WITH SERIAL COMMUNICATION INTERFACESFeatures• Pin and Software Compatibility with Standard 80C51 Products and 80C51Fx/Rx/Rx+• Plug-In R ..
TPS51220A-TPS51220ARSNR-TPS51220ARSNT-TPS51220ARTVR-TPS51220ARTVT
Fixed-Frequency, 99% Duty Cycle Peak Current-Mode Notebook System Pwr Controller
VREG3
EN2
EN1 TPS51220A
(QFN32)5
PGOOD2
SKIPSEL2
CSP2
CSN2
PGOOD1
SKIPSEL1
CSP1
CSN1
C22
VBAT
PowerPAD
C02
C01
VREG5
5V/100mA
R23
R13
R11
VREG3
Q11
Q12
Q22
Q21
C13
R12
GND
GND
GND
R24
GND
C23
C21
R21
R22
GND
PGOOD2
EN2
VO2
3.3V
PGND
GND SKIPSEL2
VBAT
C12
VBAT
C14PGND
PGND
PGND
PGND PGND PGND
C24
GND
TPS51220A
www.ti.com SLUS897E –DECEMBER 2008–REVISED JANUARY 2013
Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller
Checkfor Samples: TPS51220A
1FEATURES Input Voltage Range: 4.5Vto32V • Powergood Output for Each Channel Output Voltage Range:1Vto12V • OCL/OVP/UVP/UVLO Protections
(OVP Disable Option)• Selectable Light Load Operation
(Continuous/ Auto Skip/ Out-Of-Audio™ Skip) • Thermal Shutdown (Non-Latch) Programmable Droop Compensation • Output Discharge Function (Disable Option) Voltage Servo Adjustable Soft Start • Integrated Boot Strap MOSFET Switch 200-kHzto 1-MHz Fixed-Frequency PWM • QFN-32 (RTV/RSN) Package Selectable Current/ D-CAP™ Mode APPLICATIONSArchitecture Notebook Computer System and I/O Bus• 180° Phase Shift Between Channels Pointof Loadin LCD TV, MFP• Resistoror Inductor DCR Current Sensing Adaptive Zero Crossing Circuit
DESCRIPTIONThe TPS51220Aisa dual synchronous buck regulator controller with two LDOs.Itis optimized for 5-V/3.3-V
system controller, enabling designersto cost effectively complete 2-cellto 4-cell notebook system power supply.
The TPS51220A supports high efficiency, fast transient response, and 99% duty cycle operation.It supports
supply input voltage ranging from 4.5Vto 32V, and output voltages from1Vto 12V. Two typesof control
schemes canbe chosen depending on the application. Peak current mode supports stability operation with lower
ESR capacitor and output accuracy. The D-CAP mode supports fast transient response. The high duty (99%)
operation and the wide input/output voltage range supports flexible design for small mobile PCs anda wide
varietyof other applications. The fixed frequency canbe adjusted from 200 kHzto1 MHzbya resistor, and each
channel runs 180° out-of-phase. The TPS51220A can also synchronizeto the external clock, and the interleaving
ratio can be adjusted by its duty. The TPS51220Ais availablein the 32-pin 5×5/4×4 QFN package andis
specified from –40°Cto 85°C.
TYPICAL APPLICATION CIRCUIT
