TPS53515_15 Datasheet, PDF (1/39 Pages) Texas Instruments – TPS53515 1.5-V to 18-V (4.5-V to 25-V Bias) Input, 12-A Single Synchronous Step-Down SWIFT™ Converter

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TPS53515
SLUSBN5B – AUGUST 2013 – REVISED JULY 2015
TPS53515 1.5-V to 18-V (4.5-V to 25-V Bias) Input,
12-A Single Synchronous Step-Down SWIFT™ Converter
1 Features
•1 Integrated 13.8-mΩ 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 SWIFT™
• Auto-Skipping Eco-mode™ for High Light-Load
Efficiency
• FCCM for Tight Output Ripple and Voltage
Requirements
• Eight Selectable Frequency Settings from
250 kHz to 1 MHz
• Precharged Startup Capability
• Built-in Output Discharge Circuit
• Open-Drain Power-Good Output
• 3.5 mm × 4.5 mm, 28-Pin, VQFN-CLIP Package
2 Applications
• Server and Cloud-Computing POLs
• Broadband, Networking, and Optical
Communications Infrastructure
• I/O Supplies
• Supported at the WEBENCH^® Design Center
3 Description
The TPS53515 device 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
device is available in a 28-pin VQFN-CLIP package
and is specified from –40°C to 85°C ambient
temperature.
Device Information ⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS53515
VQFN-CLIP (28)
4.50 mm × 3.50 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
Efficiency
PGOOD
100
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
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
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.