TPS51220RHBT ,Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller 32-VQFN -40 to 85FEATURES2• Input Voltage Range: 4.5 V to 28 V • Powergood Output for Each Channel• Output Voltage R ..
TPS51220RHBT ,Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller 32-VQFN -40 to 85ORDERING INFORMATIONORDERABLE PART(1)T PACKAGE TRANSPORT MEDIA QUANTITYANUMBERTPS51220RHBT Tape and ..
TPS51220RHBT . ,Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller 32-VQFN -40 to 85This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated cir ..
TPS51221RTVR ,Fixed Frequency 99% Duty Cycle Peak Current Mode Notebook System Power Dual Controller 32-WQFN -40 to 85FEATURES APPLICATIONS• Notebook Computer System and I/O Bus2• Input Voltage Range: 4.5 V to 28 V• P ..
TPS51221RTVT ,Fixed Frequency 99% Duty Cycle Peak Current Mode Notebook System Power Dual Controller 32-WQFN -40 to 85maximum ratings may cause permanent damage to the device. These are stress ratingsonly and function ..
TPS51222RTVR ,Fixed-Frequency, 99% Duty Cycle Peak Current-Mode Notebook System Power Controller 32-WQFN -40 to 85FEATURES2• Input Voltage Range: 4.5 V to 32 V APPLICATIONS• Notebook Computer System and I/O Bus• O ..
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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 ..
TPS51220-TPS51220RHBR-TPS51220RHBRG4-TPS51220RHBT-TPS51220RHBT .
Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller
DRVH2
VREG3
EN2
DRVH1
EN1 TPS51220RHB
(QFN32)5
PGOOD2
SKIPSEL2
CSP2
CSN2
PGOOD1
SKIPSEL1
CSP1
CSN1
VFB1
SW1
VBST1
VL1
VREG5
GND
VL2
VBST2
SW2
COMP1
FUNC
VREF2
TRIP
COMP2
VFB2
C22
VBAT
PowerPAD
C02
C01
VREG5
5V/100mA
R23
R13
VREG3
3.3V/10mA
Q11
Q12
Q22
Q21
C13
R12
GND
R24
GND
C23
C21
R21
PGOOD2
EN2
VO2
3.3 V
C03
PGND
GND SKIPSEL2
VBAT
VO2
C12
VBAT
C14PGND
PGND
PGND
PGND PGND PGND
C24
GND
TPS51220
www.ti.com SLVS785C–OCTOBER 2007–REVISED JULY 2009
Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller
Checkfor Samples: TPS51220
1FEATURES Input Voltage Range: 4.5Vto28V • 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 kHzto1 MHz Fixed Frequency PWM • QFN-32 (RHB) 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
DESCRIPTIONThe TPS51220isa dual synchronous buck regulator controller with2 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
TPS51220 supports high efficiency, fast transient response and 99% duty cycle operation.It supports supply
input voltage ranging from 4.5Vto 28V, and output voltages from1Vto 12V. Two typesof control schemes
can be 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° outof phase. The TPS51220 can also synchronizeto the external clock, and the interleaving
ratio can be adjusted byits duty. The TPS51220is availablein the 32 pin 5x5 QFN package andis specified
from –40°Cto 85°C.
Figure1. TYPICAL APPLICATION CIRCUIT
