Texas Instruments TPS54614EVM 1.8-V SWIFT, User Manual, Page: 10 / 33

Background
1-2
1.1 Background
The TPS54614 evaluation module uses the TPS54614 synchronous buck
regulator to provide a 1.8-V output. This voltage is maintained over an input
range of 3.0 V to 6.0 V, and over a load range of 0 A to 6 A. The TPS54614
EVM circuitry contains only seven electrical components covering an area less
than one square inch.
The TPS54614 has two key features that reduce the number of additional
components compared to traditional synchronous buck controllers. The first
feature is that the MOSFETs are incorporated inside the TPS54614 package.
This eliminates the need for external MOSFETs and their associated drivers.
The second feature is that the compensation components that stabilize the
feedback loop are also incorporated inside the TPS54614 package.
Because the internal compensation of the TPS54614 is fixed, loop stability is
assured by the proper selection of an output inductor and output capacitor. For
guidelines on selecting an output inductor and output capacitor for a specific
application, refer to Texas Instruments application report SLVA105
– Designing With Internally Compensated SWIFT
t
Regulators.
1.2 Performance Specification Summary
A summary of the TPS54614EVM performance specifications is provided by
Table 1–1. All specifications are given for an ambient temperature of 25
°
C,
unless otherwise noted.
Table 1–1. Performance Specification Summary
Specification Test Conditions Min Typ Max Units
Input voltage range I
O
= 6 A 3 5 6 V
Output voltage set point 1.8 V
Output current range 0 > 6 A
Line regulation I
O
= 6 A –5 +5 mV
Load regulation V
IN
= 5 V –9 +9 mV
I 1 5 A to 4 5 A t 16
µ
s
–80 mV
PK
Load transient response
I
O
= 1.5 A to 4.5 A, t
r
= 16
µ
s
50
µ
s
Load transient response
I 4 5 A to 1 5 A t 12
µ
s
55 mV
PK
I
O
= 4.5 A to 1.5 A, t
f
= 12
µ
s
50
µ
s
Loop bandwidth V
IN
= 5 V, I
O
= 6 A 50 kHz
Phase margin V
IN
= 5 V, I
O
= 6 A 46
_
Input ripple voltage 270 mV
pp
Output ripple voltage 10 18 mV
PP
Output rise time 3.6 ms
Operating frequency 440 550 660 kHz
Efficiency V
IN
= 5 V, I
O
= 1.5 A 91%