Datasheet

1 Introduction
1.1 Background
1.2 Performance Specification Summary
Introduction www.ti.com
This user's guide contains background information for the TPS54917 as well as support documentation for
the TPS54917EVM-367 evaluation module (HPA367). Also included are the performance specifications,
the schematic, and the bill of materials for the TPS54917EVM-367.
The TPS54917 dc/dc converter is designed to provide up to a 9 A output from an input voltage source of 3
V to 4 V. Rated input voltage and output current range for the evaluation module are given in Table 1 .
This evaluation module is designed to demonstrate the small printed-circuit-board areas that may be
achieved when designing with the TPS54917 regulator. The switching frequency is internally set at a
nominal 1600 kHz. The both high-side and low-side MOSFETs are incorporated inside the TPS54917
package along with the gate drive circuitry. The low drain-to-source on resistance of the MOSFET allows
the TPS54917 to achieve high efficiencies and helps keep the junction temperature low at high output
currents. The compensation components are external to the integrated circuit (IC), and an external divider
allows for an adjustable output voltage. Additionally, the TPS54917 provides adjustable slow start,
synchonization, enable and frequency adjust inputs along with a powergood output. The absolute
maximum input voltage is 7 V for the TPS54917EVM-367.
Table 1. Input Voltage and Output Current Summary
EVM INPUT VOLTAGE RANGE OUTPUT CURRENT RANGE
TPS54917EVM-367 VIN = 3 V to 4 V 0 A to 9 A
A summary of the TPS54917EVM-367performance specifications is provided in Table 2 . Specifications are
given for an input voltage of V
IN
= 3.3 V and an output voltage of 1.8 V, unless otherwise specified. The
TPS54917EVM-367is designed and tested for V
IN
= 3 V to 4 V. The ambient temperature is 25 ° C for all
measurements, unless otherwise noted.
Table 2. TPS54917EVM-367Performance Specification Summary
SPECIFICATION TEST CONDITIONS MIN TYP MAX UNIT
V
IN
voltage range 3 3.3 4 V
Output voltage set point 1.8 V
Output current range V
IN
= 3 V to 4V 0 9 A
Line regulation I
O
= 4.5 A, V
IN
= 3 V to 4 V ± 0.015%
Load regulation V
IN
= 3.3 V, I
O
= 0 A to 9A ± 0.035%
Load transient response I
O
= 2.2 A to 6.5 A Voltage change –40 mV
Recovery time 250 µ s
I
O
= 6.5 A to 2.2 A Voltage change 40 mV
Recovery time 250 µ s
Loop bandwidth V
IN
= 3.3 V, I
O
= 4.5 A 45 kHz
Phase margin V
IN
= 3.3 V , I
O
= 4.5 A 75 °
Input ripple voltage I
O
= 9 A 140 mVpp
Output ripple voltage I
O
= 9 A 10 mVpp
Output rise time 8 ms
Operating frequency 1600 kHz
Maximum efficiency V
IN
= 3 V, I
O
= 1.5 A 90%
TPS54917EVM-367 9-A, SWIFT™ Regulator Evaluation Module2 SLVU278 – December 2008
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