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TPS56C20, TPS56920, TPS56720, TPS56520
SLVSCB6E – NOVEMBER 2013 – REVISED DECEMBER 2017
TPS56x20 4.5V to 17V Input, 12A/9A/7A/5A Output, Synchronous Step-Down Voltage Regulator with Voltage Scaling
1 Features
•1 D-CAP2™ Control – Input Voltage Range: 4.5V to 17V – Switching Frequency: 500kHz – Optimized for a 1.0µH to 2.2µH Inductor
• ±1% Output Voltage Accuracy • Features via I2C Compatible Interface
– Output Voltage (VID): 0.6V to 1.87V in 10mV – Auto-Skip Eco-mode™ ON/OFF (Light-load) – Current Limit Target: 40% to 160% – Enabling IC, Reading-back Power-good – Hiccup Mode Protection ON/OFF • IC Terminal Features – Start-up by Using External Resistors
Output Voltage with VFB Pin: 0.6V to 1.87V – Adjustable Soft-start,
Monotonic Pre-Biased Start-up – Power-good – I2C Address Programming (2bits) • Cycle-by-Cycle Overcurrent Limiting Control • Thermal Shutdown (TSD) • Undervoltage Lockout (UVLO) • TSSOP Package (PWP) with PowerPAD™
2 Applications
• Media Processors for Consumer Applications: Digital TVs, Set Top Boxes (STB, DVD/Blu-ray Player, Cable/Satellite Modem)
• SoC Processors • High Density Power Distribution Systems
3 Description
The TPS56X20 is a synchronous DC-DC converter IC (integrated circuit) with a voltage scaling control to power up micro-processors (MCUs) requiring core voltage (VCORE) tune-ups. After the initial power-up, the output voltage can be programmed/scaled by VID codes sent over an I2C compatible bus.
This step-down (buck) converter employs an adaptive on-time D-CAP2 mode control which provides a very fast transient response with no external components. Unlike traditional voltage-/current-mode controls, the D-CAP2 supports seamless transition between PWM mode for higher load and Eco-mode™ for light load. Eco-mode maintains high efficiency in light-load.
PART NUMBER TPS56C20 TPS56920 TPS56720 TPS56520
Device Information
PACKAGE
BODY SIZE
HTSSOP (24)
7.80 mm × 4.40 mm
HTSSOP (20)
6.50 mm × 4.40 mm
Typical Application Circuit
3.3 V
R1 R2 R3 1.0kΩ 1.0kΩ 1.0kΩ
U1
TPS56520 TPS56720 TPS56920
1 EN
VFB
VIN SDA
2 SDA
VOUT
µProcessor SCL
3 A1 4
SCL A1
SS GND
A0 5 A0
VREG5
6 VIN
PGOOD
7
VIN
PVIN
VBST
C1 10µF
C2 4.7µF
8 PVIN
9 PGND
SW SW
10 PGND
SW
PGND
AGND
20 19 18 17 16 15 14 13 11 12
21 PWRPAD
PGND
PGND
R4 10.0k
PWRGD
R5 18.2kΩ
C4 2.2µF
C5 0.01µF
R6 22kΩ
C3
0.1µF
L1
AGND
1.5µH
VOUT
C6 100µF
PGND
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.
TPS56C20, TPS56920, TPS56720, TPS56520
SLVSCB6E – NOVEMBER 2013 – REVISED DECEMBER 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Description (Continued) ........................................ 3 6 Pin Configuration and Functions ......................... 4 7 Specifications......................................................... 6
7.1 Absolute Maximum Ratings ...................................... 6 7.2 ESD Ratings.............................................................. 6 7.3 Recommended Operating Conditions....................... 6 7.4 Thermal Information ................................................. 7 7.5 Electrical Characteristics........................................... 7 7.6 Timing Requirements ................................................ 9 7.7 Switching Characteristics .......................................... 9 7.8 Typical Characteristics ............................................ 10 8 Detailed Description ............................................ 15 8.1 Overview ................................................................. 15 8.2 Functional Block Diagram ....................................... 15 8.3 Feature Description................................................. 16
8.4 Device Functional Modes........................................ 18 8.5 Programming........................................................... 18 8.6 Register Maps ......................................................... 20 9 Applications and Implementation ...................... 24 9.1 Application Information............................................ 24 9.2 Typical Application .................................................. 24 10 Power Supply Recommendations ..................... 32 11 Layout................................................................... 32 11.1 Layout Guidelines ................................................. 32 11.2 Layout Example ........