TPS53515 Datasheet, PDF (1/33 Pages) Texas Instruments – 1.5 to 18 V (4.5 to 25 V bias) Input, 12-A Single Synchronous Step-Down SWIFT Converter

TPS53515
www.ti.com
SLUSBN5A – AUGUST 2013 – REVISED DECEMBER 2013
1.5 to 18 V (4.5 to 25 V bias) Input, 12-A Single Synchronous Step-Down SWIFT™
Converter
FEATURES
1
•2 Integrated 13.8 and 5.9 mΩ MOSFETs With
12-A Continuous Output Current
• Supports All Ceramic Output Capacitors
• Reference Voltage 600 mV ±0.5% Tolerance
• Output Voltage Range: 0.6 V to 5.5 V
• D-CAP3™ Control Mode With Fast Load-Step
Response
• Auto-Skipping Eco-mode™ for High Light-
Load Efficiency
• FCCM for Tight Output Ripple and Voltage
Requirements
• Eight Selectable Frequency Settings from
200 kHz to 1 MHz
• Pre-Charged Startup Capability
• Built-in Output Discharge Circuit
• Open-Drain Power-Good Output
• 3.5 mm × 4.5 mm , 28-Pin, QFN Package
PGOOD
VIN
23
22 21 20
19 18
17 16 15
24 VO
25 TRIP
26 DNC
27 GND1
28 GND2
TPS53515
PGND 14
PGND 13
PGND 12
PGND 11
PGND 10
1
234
56789
Thermal Pad
VREG EN
VOUT
APPLICATIONS
• Server and Cloud-Computing POLs
• Broadband, Networking, and Optical
Communications Infrastructure
• I/O Supplies
• Supported at the WEBENCH™ Design Center
DESCRIPTION
The TPS53515 is a small-sized, synchronous buck
converter with an adaptive on-time D-CAP3™ control
mode. The device offers ease-of-use and low
external-component count for space-conscious power
systems.
This device features high-performance integrated
MOSFETs, accurate 0.5% 0.6-V reference, and an
integrated boost switch. Competitive features include
very-low external-component count, fast load-
transient response, auto-skip mode operation,
internal soft-start control, and no requirement for
compensation
A forced continuous conduction mode helps meet
tight voltage regulation accuracy requirements for
performance DSPs and FPGAs. The TPS53515 is
available in a 28-pin QFN package and is specified
from –40°C to +85°C ambient temperature.
.
.
EFFICIENCY
100
90
80
f_SW = 500 KHz, V_IN = 12 V, V_DD = 5 V
T_A = 25°C, L _OUT = 1 H, Mode = Auto-skip
70
Vo_OUu_Tt = 0.6 V
V_Oo_Uu_Tt = 1 V
Vo_OUu_Tt = 1.2 V
V_Oo_Uu_Tt = 1.5 V
Vo_OUu_Tt = 1.8 V
V_Oo_Uu_Tt = 2.5 V
60
VoOUuTt = 3.3 V
V_OoUuTt = 5 V
0
2
4
6
8
10
12
Output Current (A)
C003
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.
SWIFT, D-CAP3, Eco-mode, WEBENCH are trademarks of Texas Instruments.
2
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 © 2013, Texas Instruments Incorporated