TPS56C20 Datasheet, PDF (1/44 Pages) Texas Instruments – Synchronous Step-Down Voltage Regulator with Voltage Scaling

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TPS56C20, TPS56920, TPS56720, TPS56520
SLVSCB6D – NOVEMBER 2013 – REVISED FEBRUARY 2016
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 (V_CORE) 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
20
VFB
VIN
SDA
2
SDA
19
VOUT
µProcessor ^SCL
3
SCL
A1 4
A1
18
SS
17
GND
A0 5
A0
16
VREG5
6
VIN
15
PGOOD
7
14
VIN
PVIN
VBST
C1
10µF
C2
4.7µF
8
PVIN
9
PGND
10
PGND
13
SW
11
SW
12
SW
PGND
AGND
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.