Step-Down Controller. TPS51219 Datasheet

TPS51219 Controller. Datasheet pdf. Equivalent

Part TPS51219
Description Single Synchronous Step-Down Controller
Feature www.ti.com TPS51219 SLUSAG1B – MARCH 2011 – REVISED OCTOBER 2011 High Performance, Single-Synchrono.
Manufacture etcTI
Datasheet
Download TPS51219 Datasheet



TPS51219
www.ti.com
TPS51219
SLUSAG1B MARCH 2011 REVISED OCTOBER 2011
High Performance, Single-Synchronous Step-Down Controller
with Differential Voltage Feedback
FEATURES
1
23 Differential Voltage Feedback
DC Compensation for Accurate Regulation
Wide Input Voltage Range: 3 V to 28 V
Output Voltage Range: 0.5 V to 2.0 V with
Fixed Options of 1.05 V and 1.00 V
Wide Output Load Range: 0 A to 20 A+
Adaptive On-Time Modulation with Selectable
Control Architecture and Frequency
D-CAPMode at 300 kHz/400 kHz for Fast
Transient Response
D-CAP2Mode at 500 kHz/670 kHz for
Ceramic Output Capacitor
4700 ppm/°C, Low-Side RDS(on) Current Sensing
RSENSE Accurate Current Sense Option
Internal, 1-ms Voltage Servo Softstart
Built-In Output Discharge
Power Good Output
Integrated Boost Switch
Built-In OVP/UVP/OCP
Thermal Shutdown (Non-latched)
3 mm × 3 mm, 16-Pin, QFN (RTE) Package
APPLICATIONS
Notebook Computers
I/O Supplies
DESCRIPTION
The TPS51219 is a small-sized single buck controller
with adaptive on-time control. It provides a choice of
control modes (D-CAPor D-CAP2) to meet a
wide range of system requirements. It is designed for
tight DC regulation requirements such as the VCCIO
application for Intel® notebooks. The performance
and flexibility of the TPS51219 makes it suitable for
low output voltage, high current, PC system power
rails and similar point-of-load (POL) power supplies.
Differential voltage feedback and the voltage
compensation function combine to provide high
precision power to load devices.
A small package, fixed voltage options and minimal
external component count saves cost and space,
while a dedicated EN pin and pre-set frequency
selections minimize design effort. The skip-mode at
light load condition, strong gate drivers, and low-side
FET RDS(on) current sensing provides high efficiency
operation over a broad load range. The external
resistor current sense option enables accurate
current sensing. The conversion input voltage (the
high-side FET drain voltage) ranges from 3 V to 28 V
and output voltage ranges from 0.5 V to 2.0 V. The
device requires an external 5-V supply.
The TPS51219 is available in a 16-pin, QFN package
and is specified for ambient temperature from -40°C
to 85°C.
V
IN
V5IN
PGOOD
EN
16 15 14
13
GSNS
1 VREF
2 REFIN
3 GSNS
TPS51219RTE
SW 12
DH 11
V5 9
V
OUT
VSNS
4 VSNS
DL 10
56
7
8
UDG-11006
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.
D-CAP, D-CAP2 are trademarks of Texas Instruments.
2
Intel is a registered trademark of Intel.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated



TPS51219
TPS51219
SLUSAG1B MARCH 2011 REVISED OCTOBER 2011
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
TA
40°C to 85°C
ORDERING INFORMATION(1)
PACKAGE
ORDERABLE DEVICE
NUMBER
PINS
TPS51219RTER
Plastic Quad Flat Pack (QFN)
16
TPS51219RTET
OUTPUT
SUPPLY
Tape and reel
Mini-reel
MINIMUM
QUANTITY
3000
250
(1) For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
ABSOLUTE MAXIMUM RATINGS(1)
over operating free-air temperature range (unless otherwise noted)
VALUE
UNIT
MIN
MAX
BST
BST (3)
0.3
36
0.3
6
Input voltage range(2)
SW
EN, MODE, TRIP, V5
5
30
0.3
6.0 V
COMP, REFIN, VSNS
0.3
3.6
GSNS
0.35
0.35
PGND
0.3
0.3
Output voltage range(2)
DH
DH (3)
DL
5
36
0.3
6
0.3
6V
PGOOD
0.3
6
VREF
0.3
3.6
Junction temperature range, TJ
Storage temperature range, TSTG
125 °C
55
150 °C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to the network ground terminal unless otherwise noted.
(3) Voltage values are with respect to the SW terminal.
2
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Copyright © 2011, Texas Instruments Incorporated





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