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TPS51220RHBR Datasheet(PDF) 1 Page - Texas Instruments

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Part # TPS51220RHBR
Description  Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS51220RHBR Datasheet(HTML) 1 Page - Texas Instruments

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1
FEATURES
APPLICATIONS
DESCRIPTION
1
2
3
4
24
23
22
21
DRVH2
VIN
VREG3
EN2
DRVH1
V5SW
RF
EN1
TPS51220RHB
(QFN32)
5
6
7
8
20
19
18
17
PGOOD2
SKIPSEL2
CSP2
CSN2
PGOOD1
SKIPSEL1
CSP1
CSN1
9
32
31
30
29
28
27
26
25
10
11
12
13
14
15
16
VO1
5.0V
L1
C22
VBAT
PowerPAD
C02
C01
VREG5
5V/100mA
R23
R13
C11
R11
PGOOD1
EN
EN1
VREG3
3.3V/10mA
Q11
Q12
Q22
Q21
C13
R12
GND
R14
GND
GND
GND
L2
R24
GND
C23
C21
R21
R22
GND
PGOOD2
EN2
VO2
3.3V
C03
R01
PGND
GND
SKIPSEL1
SKIPSEL2
VBAT
VO2
C12
VBAT
VO1
VO1
VREG5
C14
PGND
PGND
PGND
PGND
PGND
PGND
PGND
C24
GND
TPS51220
SLVS785 – OCTOBER 2007
www.ti.com
Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller
2
• Input Voltage Range: 4.5V to 28V
• Powergood Output for Each Channel
• Output Voltage Range: 1V to 12V
• 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
• 200kHz to 1MHz Fixed Frequency PWM
• QFN32 (RHB)
• Selectable Current/D-CAP™ Mode Architecture
• 180° Phase Shift Between Channels
• Notebook Computer System and I/O Bus
• Resistor or Inductor DCR Current Sensing
• Point of Load in LCD TV, MFP
The TPS51220 is a dual synchronous buck regulator controller with 2 LDOs. It is optimized for 5V/3.3V system
controller, enabling designers to cost effectively complete 2-cells to 4-cells notebook system power supply. The
TPS51220 supports high efficiency, fast transient response and 99% duty cycle operation. It supports supply
input voltages ranging from 4.5V to 28V, and output voltages from 1V to 12V. Two types of 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 and a wide
variety of other applications. The fixed frequency can be adjusted from 200kHz to 1MHz by a resistor, and each
channel runs 180
° out of phase. The TPS51220 can also synchronize to the external clock, and the interleaving
ratio can be adjusted by its duty. The TPS51220 is available in the 32 pin 5x5 QFN package and is specified
from –40
°C to 85°C.
TYPICAL APPLICATION CIRCUIT
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
Out-Of-Audio, D-CAP, PowerPAD are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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