SLVSHT1 August 2024 TPS55287-Q1
PRODUCTION DATA
- 1
- 1 Features
- 2 Applications
- 3 Description
- 4 Pin Configuration and Functions
- 5 Specifications
-
6 Detailed Description
- 6.1 Overview
- 6.2 Functional Block Diagram
- 6.3
Feature Description
- 6.3.1 VCC Power Supply
- 6.3.2 EXTVCC Power Supply
- 6.3.3 I2C Address Selection
- 6.3.4 Input Undervoltage Lockout
- 6.3.5 Enable and Programmable UVLO
- 6.3.6 Soft Start
- 6.3.7 Shutdown and Load Discharge
- 6.3.8 Switching Frequency
- 6.3.9 Switching Frequency Dithering
- 6.3.10 Inductor Current Limit
- 6.3.11 Internal Charge Path
- 6.3.12 Output Voltage Setting
- 6.3.13 Output Current Monitoring and Cable Voltage Droop Compensation
- 6.3.14 Output Current Limit
- 6.3.15 Overvoltage Protection
- 6.3.16 Output Short Circuit Protection
- 6.3.17 Thermal Shutdown
- 6.4 Device Functional Modes
- 6.5 Programming
-
7 Register Maps
- 7.1 REF Register (Address = 0h, 1h) [reset = 10100100b, 00000001b]
- 7.2 IOUT_LIMIT Register (Address = 2h) [reset = 11100100b]
- 7.3 VOUT_SR Register (Address = 3h) [reset = 00000001b]
- 7.4 VOUT_FS Register (Address = 4h) [reset = 00000011b]
- 7.5 CDC Register (Address = 5h) [reset = 11100000b]
- 7.6 MODE Register (Address = 6h) [reset = 00100000b]
- 7.7 STATUS Register (Address = 7h) [reset = 00000011b]
- 7.8 Register Summary
- 8 Application and Implementation
- 9 Device and Documentation Support
- 10Revision History
- 11Mechanical, Packaging, and Orderable Information
5.7 Typical Characteristics
VIN = 12V, TA = 25°C, unless otherwise noted.
VIN = 12V, TA = 25°C, unless otherwise noted.
Figure 5-1 Efficiency vs
Output Current,
VOUT = 5V, fSW = 400 kHz, FPWM. VIN = 12V, TA = 25°C, unless otherwise noted.
Figure 5-1 Efficiency vs
Output Current, VOUT = 5V, fSW = 400 kHz, FPWM. VIN = 12V, TA = 25°C, unless otherwise noted.
Figure 5-3 Efficiency vs Output Current, VOUT = 9V, fSW = 400 kHz, FPWM
Figure 5-5 Efficiency vs Output Current, VOUT = 12V, fSW = 400 kHz, FPWM
Figure 5-7 Efficiency vs Output Current, VOUT = 15V, fSW = 400 kHz, FPWM
Figure 5-9 Efficiency vs Output Current, VOUT = 20V, fSW = 400 kHz, FPWM
Figure 5-11 Efficiency vs Output Current, VOUT = 9 V, fSW = 2 MHz, FPWM
Figure 5-13 Efficiency vs Output Current, VOUT = 12 V, fSW = 2 MHz, FPWM
Figure 5-15 Efficiency vs Input Voltage, VOUT = 12 V, IOUT = 2A, FPWM
Figure 5-17 Reference Voltage vs Temperature
(VREF = 0.282V)
Figure 5-19 Reference Voltage vs Temperature
(VREF = 0.846V)
Figure 5-21 Quiescent Current vs
Temperature
Figure 5-23 ENABLE/UVLO Rising Threshold vs
Temperature
Figure 5-25 CDC Voltage vs Output Current with
RSENSE = 10mΩ
Figure 5-2 Efficiency vs
Output Current, VOUT = 5V, fSW = 400 kHz, PFM
Figure 5-4 Efficiency vs Output Current, VOUT = 9V, fSW = 400 kHz, PFM
Figure 5-6 Efficiency vs Output Current, VOUT = 12V, fSW = 400 kHz, PFM
Figure 5-8 Efficiency vs Output Current, VOUT = 15V, fSW = 400 kHz, PFM
Figure 5-10 Efficiency vs Output Current, VOUT = 20V, fSW = 400 kHz, PFM
Figure 5-12 Efficiency vs Output Current, VOUT = 9 V, fSW = 2 MHz, PFM
Figure 5-14 Efficiency vs Output Current, VOUT = 12 V, fSW = 2 MHz, PFM
Figure 5-16 Switching Frequency vs Setting
Resistance
Figure 5-18 Reference Voltage vs Temperature
(VREF = 0.508V)
Figure 5-20 Reference Voltage vs Temperature
(VREF = 1.129V)
Figure 5-22 Shutdown Current vs
Temperature
Figure 5-24 Switching Frequency vs
Temperature