Texas Instruments 0A Evaluation Module Featuring the TPS51117 Synchronous Buck Controller with D-CAP Mode TPS51117EVM TPS51117EVM Scheda Tecnica
Codici prodotto
TPS51117EVM
1
2
3
14
13
12
VBST
DRVH
LL
EN_PSV
TON
VOUT
TPS51117RGY
4
5
6
7
11
10
9
8
TRIP
V5DRV
DRVL
PGND
V5FILT
VFB
PGOOD
GND
+
VOUT
0.75V~5.5V
0.75V~5.5V
Q2
L1
Q1
-
PGND
C2
C4
C1
R6
PGOOD
+5V
EN_PSV
R4
R1
R2
R3
R5
VIN
1.8V~28V
1.8V~28V
C3
GND
+
+
GND
GND
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SLVS631B – DECEMBER 2005 – REVISED SEPTEMBER 2009
SINGLE SYNCHRONOUS STEP-DOWN CONTROLLER
Check for Samples :
1
FEATURES
DESCRIPTION
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•
High Efficiency, Low Power Consumption,
4.5-
4.5-
μ
A Typical Shutdown Current
The TPS51117 is a cost effective, synchronous buck
controller for POL voltage regulation in notebook PC
controller for POL voltage regulation in notebook PC
•
Fixed Frequency Emulated On-Time Control,
applications. The controller is dedicated for Adaptive
Adjustable from 100 kHz to 550 kHz
On-Time D-CAP™ Mode operation that provides
•
D-CAP™ Mode with 100-ns Load Step
ease of use, low external component count, and fast
Response
transient response. Auto-skip mode for high efficiency
•
< 1% Initial Reference Accuracy
down to the milli-ampere load range, or PWM-only
mode for low noise operation is selectable.
mode for low noise operation is selectable.
•
Output Voltage Range: 0.75 V to 5.5 V
•
Wide Input Voltage Range: 1.8 V to 28 V
The current sensing scheme for positive overcurrent
and negative overcurrent protection is loss-less
and negative overcurrent protection is loss-less
•
Selectable Auto-Skip/PWM-Only Operation
low-side
R
DS(on)
sensing
plus
temperature
•
Temperature Compensated (4500 ppm/°C)
compensation. The device receives a 5-V (4.5 V to
Low-Side R
DS(on)
Overcurrent Sensing
5.5 V) supply from another regulator such as the
•
Negative Overcurrent Limit
TPS51120 or TPS51020. The conversion input can
be either VBAT or a 5-V rail, ranging from 1.8 V to
be either VBAT or a 5-V rail, ranging from 1.8 V to
•
Integrated Boost Diode
28 V, and the output voltage range is from 0.75 V to
•
Integrated OVP/UVP and Thermal Shutdown
5.5 V.
•
Power-Good Signal
The TPS51117 is available in a 14-pin QFN or a
•
Internal 1.2-ms Voltage Softstart
14-pin TSSOP package and is specified from –40°C
•
Integrated Output Discharge (Softstop)
to 85°C.
APPLICATIONS
•
Notebook Computers
•
I/O Supplies
•
System Power Supplies
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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.
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
D-CAP is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2005–2009, 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.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.