TPS53318 Step-Down Converter Evaluation Module User's Guide

1 Introduction

The TPS53319EVM-136 evaluation module (EVM) uses the TPS53319. The TPS53319 is a D-CAP mode, 14-A synchronous buck converter with integrated MOSFETs. The device provides a fixed 1.5-V output at up to 14 A from a 12-V input bus.

1.1 Typical Applications

Server/storage
Workstations and desktops
Telecommunication infrastructure

1.2 Features

The TPS53319EVM-136 features:

14-A DC steady state output current
Support pre-bias output voltage start-up
J3 for selectable switching frequency setting
J4 for selectable soft-start time
J5 for auto-skip and forced CCM selection
J6 for enable function
Convenient test points for probing critical waveforms

2 Electrical Performance Specifications

Table 2-1 TPS53319EVM-136 Electrical Performance Specifications

PARAMETER⁽¹⁾	TEST CONDITIONS	MIN	TYP	MAX	UNITS
INPUT CHARACTERISTICS
Voltage range	V_IN	8	12	20	V
Maximum input current	V_IN = 8 V, I_O = 14 A		2.874		A
No load input current	V_IN = 20 V, I_O = 0 A with auto skip mode		0.7		mA
OUTPUT CHARACTERISTICS
Output voltage VOUT			1.5		V
Output voltage regulation	Line regulation (V_IN = 8 V–20 V)		0.1%
	Load regulation (V_IN = 12 V, I_O = 0 A–14 A), auto-skip		1%
Output voltage ripple	V_IN = 12 V, I_O = 14 A		15		mVpp
Output load current		0		14	A
Output over current			16		A
SYSTEMS CHARACTERISTICS
Switching frequency			500		kHz
Peak efficiency	V_IN = 12 V, 1.5 V/8 A		91.68%
Full load efficiency	V_IN = 12 V, 1.5 V/14 A		90.04%
Operating temperature			25		°C

(1) Note: Jumpers set to default locations. See Section 6.

3 Schematic

Figure 3-1 TPS53319EVM-136 Schematic