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TPS544x25 4.5-V to 18-V, 20-A and 30-A SWIFT Synchronous Buck Converters with PMBus and Frequency Synchronization
SLUSC81
May 2015
TPS544B25
,
TPS544C25
PRODUCTION DATA.
CONTENTS
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TPS544x25 4.5-V to 18-V, 20-A and 30-A SWIFT Synchronous Buck Converters with PMBus and Frequency Synchronization
1
Features
2
Applications
3
Description
4
Revision History
5
Device Comparison Table
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Linear Regulators BP3 and BP6
8.3.2
Input Undervoltage Lockout (UVLO)
8.3.3
Turn-On and Turn-Off Delay and Sequencing
8.3.4
Voltage Reference
8.3.5
Differential Remote Sense
8.3.6
Set Output Voltage and Adapative Voltage Scaling (AVS)
8.3.6.1
Increasing the Output Voltage
8.3.6.2
Decreasing the Output Voltage
8.3.6.3
Set Default Output Voltage by VSET
8.3.7
Reset VOUT
8.3.8
Switching Frequency and Synchronization
8.3.9
Soft-Start and TON_RISE Command
8.3.10
Pre-Biased Output Start-Up
8.3.11
Soft-Stop and TOFF_FALL Command
8.3.12
Current Monitoring and Low-Side MOSFET Overcurrent Protection
8.3.13
High-Side MOSFET Short-Circuit Protection
8.3.14
Over-Temperature Protection
8.3.15
Output Overvoltage and Undervoltage Protection
8.3.16
TON_MAX Fault
8.3.17
Power Good (PGOOD) Indicator
8.3.18
Fault Protection Responses
8.3.19
Switching Node
8.3.20
PMBus General Description
8.3.21
PMBus Address
8.3.22
PMBus Connections
8.3.23
Auto ARA (Alert Response Address) Response
8.4
Device Functional Modes
8.4.1
Continuous Conduction Mode
8.4.2
Operation with CNTL Signal Control
8.4.3
Operation with OPERATION Control
8.4.4
Operation with CNTL and OPERATION Control
8.5
Supported PMBus Commands
8.6
Register Maps
8.6.1
OPERATION (01h)
8.6.1.1
On
8.6.1.2
Off
8.6.2
ON_OFF_CONFIG (02h)
8.6.2.1
pu
8.6.2.2
cmd
8.6.2.3
cpr
8.6.2.4
pol
8.6.2.5
cpa
8.6.3
CLEAR_FAULTS (03h)
8.6.4
WRITE_PROTECT (10h)
8.6.4.1
bit5
8.6.4.2
bit6
8.6.4.3
bit7
8.6.5
STORE_DEFAULT_ALL (11h)
8.6.6
RESTORE_DEFAULT_ALL (12h)
8.6.7
CAPABILITY (19h)
8.6.8
SMBALERT_MASK (1Bh)
8.6.9
VOUT_MODE (20h)
8.6.9.1
Mode:
8.6.9.2
Exponent
8.6.10
VOUT_COMMAND (21h)
8.6.10.1
Exponent
8.6.10.2
Mantissa
8.6.11
VOUT_MAX (24h)
8.6.11.1
Exponent
8.6.11.2
Mantissa
8.6.12
VOUT_TRANSITION_RATE (27h)
8.6.12.1
Exponent
8.6.12.2
Mantissa
8.6.13
VOUT_SCALE_LOOP (29h)
8.6.13.1
Exponent
8.6.13.2
Mantissa
8.6.14
VIN_ON (35h)
8.6.14.1
Exponent
8.6.14.2
Mantissa
8.6.15
VIN_OFF (36h)
8.6.15.1
Exponent
8.6.15.2
Mantissa
8.6.16
IOUT_CAL_OFFSET (39h)
8.6.16.1
Exponent
8.6.16.2
Mantissa
8.6.17
VOUT_OV_FAULT_LIMIT (40h)
8.6.17.1
Exponent
8.6.17.2
Mantissa
8.6.18
VOUT_OV_FAULT_RESPONSE (41h)
8.6.18.1
RSP[1]
8.6.18.2
RS[2:0]
8.6.19
VOUT_OV_WARN_LIMIT (42h)
8.6.19.1
Exponent
8.6.19.2
Mantissa
8.6.20
VOUT_UV_WARN_LIMIT (43h)
8.6.20.1
Exponent
8.6.20.2
Mantissa
8.6.21
VOUT_UV_FAULT_LIMIT (44h)
8.6.21.1
Exponent
8.6.21.2
Mantissa
8.6.22
VOUT_UV_FAULT_RESPONSE (45h)
8.6.22.1
RSP[1]
8.6.22.2
RS[2:0]
8.6.23
IOUT_OC_FAULT_LIMIT (46h)
8.6.23.1
Exponent
8.6.23.2
Mantissa
8.6.24
IOUT_OC_FAULT_RESPONSE (47h)
8.6.24.1
RSP[1]
8.6.24.2
RS[2:0]
8.6.25
IOUT_OC_WARN_LIMIT (4Ah)
8.6.25.1
Exponent
8.6.25.2
Mantissa
8.6.26
OT_FAULT_LIMIT (4Fh)
8.6.26.1
Exponent
8.6.26.2
Mantissa
8.6.27
OT_FAULT_RESPONSE (50h)
8.6.27.1
RSP[1]
8.6.27.2
RS[2:0]
8.6.28
OT_WARN_LIMIT (51h)
8.6.28.1
Exponent
8.6.28.2
Mantissa
8.6.29
TON_DELAY (60h)
8.6.29.1
Exponent
8.6.29.2
Mantissa
8.6.30
TON_RISE (61h)
8.6.30.1
Exponent
8.6.30.2
Mantissa
8.6.31
TON_MAX_FAULT_LIMIT (62h)
8.6.31.1
Exponent
8.6.31.2
Mantissa
8.6.32
TON_MAX_FAULT_RESPONSE (63h)
8.6.32.1
RSP[1]
8.6.32.2
RS[2:0]
8.6.33
TOFF_DELAY (64h)
8.6.33.1
Exponent
8.6.33.2
Mantissa
8.6.34
TOFF_FALL (65h)
8.6.34.1
Exponent
8.6.34.2
Mantissa
8.6.35
STATUS_BYTE (78h)
8.6.36
STATUS_WORD (79h)
8.6.37
STATUS_VOUT (7Ah)
8.6.38
STATUS_IOUT (7Bh)
8.6.39
STATUS_INPUT (7Ch)
8.6.40
STATUS_TEMPERATURE (7Dh)
8.6.41
STATUS_CML (7Eh)
8.6.42
STATUS_MFR_SPECIFIC (80h)
8.6.43
READ_VOUT (8Bh)
8.6.43.1
Exponent
8.6.43.2
Mantissa
8.6.44
READ_IOUT (8Ch)
8.6.44.1
Exponent
8.6.44.2
Mantissa
8.6.45
READ_TEMPERATURE_2 (8Eh)
8.6.45.1
Exponent
8.6.45.2
Mantissa
8.6.46
PMBUS_REVISION (98h)
8.6.47
MFR_VOUT_MIN (A4h)
8.6.47.1
Exponent
8.6.47.2
Mantissa
8.6.48
IC_DEVICE_ID (ADh)
8.6.49
IC_DEVICE_REV (AEh)
8.6.50
MFR_SPECIFIC_00 (D0h)
8.6.51
OPTIONS (MFR_SPECIFIC_21) (E5h)
8.6.51.1
PMB_HI_LO
8.6.51.2
PMB_VTH
8.6.51.3
EN_ADC_CNTL
8.6.51.4
VSM
8.6.51.5
DLO
8.6.51.6
AVG_PROG[1:0]
8.6.51.7
EN_AUTO_ARA
8.6.51.8
SS_DET_DIS
8.6.52
MISC_CONFIG_OPTIONS (MFR_SPECIFIC_32) (F0h)
8.6.52.1
OV_RESP_SEL
8.6.52.2
HSOC_USER_TRIM[1:0]
8.6.52.3
FORCE_SYNC
9
Applications and Implementation
9.1
Application Information
9.2
Typical Applications
9.2.1
TPS544C25 4.5-V to 18-V Input, 0.95-V Output, 30-A Converter
9.2.2
Design Requirements
9.2.3
Design Procedure
9.2.3.1
Switching Frequency Selection
9.2.3.2
Inductor Selection
9.2.3.3
Output Capacitor Selection
9.2.3.3.1
Response to a Load Transient
9.2.3.3.2
Output Voltage Ripple
9.2.3.3.3
Bus Capacitance
9.2.3.4
Input Capacitor Selection
9.2.3.5
Bootstrap Capacitor Selection
9.2.3.6
BP6 and BP3
9.2.3.7
R-C Snubber and VIN Pin High-Frequency Bypass
9.2.3.8
Temperature Sensor
9.2.3.9
Key PMBus Parameter Selection
9.2.3.9.1
Enable, UVLO and Sequencing
9.2.3.9.2
Soft-Start Time
9.2.3.9.3
Overcurrent Threshold and Response
9.2.3.9.4
Power Good, Output Overvoltage and Undervoltage Protection
9.2.3.10
Output Voltage Setting and Frequency Compensation Selection
9.2.4
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
11.2.1
Mounting and Thermal Profile Recommendation
12
Device and Documentation Support
12.1
Device Support
12.1.1
Development Support
12.1.1.1
Texas Instruments Fusion Digital Power Designer
12.1.1.2
TPS40k Loop Compensation Tool
12.2
Related Links
12.3
Community Resources
12.4
Trademarks
12.5
Electrostatic Discharge Caution
12.6
Glossary
13
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
RVF|40
MPQF268C
Thermal pad, mechanical data (Package|Pins)
RVF|40
QFND333E
Orderable Information
slusc81_oa
slusc81_pm
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