Datasheet

Background
1-2
1.1 Background
The TPS54310 evaluation module (EVM) uses the TPS54310 synchronous
buck regulator to provide a 3.3-V output over an input range of 4.0 V to 6.0 V,
and over a load range of 0 A to 3 A. Less than 0.55 square inches of board
space is occupied by the electrical components of the TPS54310 circuit.
Additional pads support multiple input and ouput capacitors. A jumper allows
the switching frequency to be easily changed from 350 kHz to 550 kHz.
The MOSFETs of the TPS54310 are incorporated inside the TPS54310
package. This eliminates the need for external MOSFETs and their associated
drivers. The low drain-to-source on resistance of the MOSFETs gives the
TPS54310 high efficiency and helps to keep the junction temperature low at
high output currents. The compensation components, external to the IC, allow
for an adjustable output voltage and a customizable loop reponse.
1.2 Performance Specification Summary
Table 1–1 provides a summary of the TPS54310 EVM performance
specifications. 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 4.0 5.0 6.0 V
Output voltage set point 3.3 V
Output current range V
IN
= 5 V 0 3 A
Load regulation V
IN
= 5 V –7 7 mV
I 0Ato3A
–95 mV
PK
Load transient res
p
onse
I
O
= 0 A to 3 A
30
†
µs
Load transient response
I 3Ato0A
75 mV
PK
I
O
= 3 A to 0 A
25
†
µs
Loop bandwidth V
IN
= 5 V, I
O
= 3 A 30 kHz
Phase margin V
IN
= 5 V, I
O
= 3 A 95 _
Input ripple voltage 120 200 mV
PP
Output ripple voltage 30 50 mV
PP
Output rise time 2.6 3.6 4.1 ms
Operating frequency 640 700 760 kHz
Efficiency V
IN
= 5 V, I
O
= 1 A 93% –
†
Transient response time is defined as the time elapsed from the onset of the transient to the time that the output returns within
±2% of its steady state value.