LM5158EVM-BST Evaluation Module

Abstract

The LM5158EVM-BST evaluation module showcases the features and performance of the LM5158 device as a wide input voltage, non-synchronous boost converter with dual random spread spectrum. The standard configuration is designed to provide regulate a 12V output at 1.2A from an input of 3.3V to 9V (load derated by half from < 6V input), and switching at a frequency of 2.1MHz.

Trademarks

All trademarks are the property of their respective owners.

1 Features and Electrical Performance

The LM5158EVM-BST supports the following features and performance capabilities:

Tightly regulated output voltage of 12V with 1% accurate reference voltage
High conversion efficiency of > 92% at full load
Constant cycle-by-cycle peak inductor current limit over input voltage range
Programmable hiccup mode for output overcurrent protection
User-adjustable soft-start time using C_SS
Output overvoltage protection
Multiple BIAS pin and VCC pin connections to test multiple configurations
- BIAS connect to VCC
- BIAS supplied with external power supply
- BIAS supplied by output voltage
Power-good (PGOOD) indicator with selectable pullup source
2.1MHz switching frequency
External clock synchronization
Programmable dual random spread spectrum reduces the EMI

1.1 Electrical Parameters

Table 1-1 Electrical Performance Standard Configuration

PARAMETER	TEST CONDITIONS	MIN	TYP	MAX	UNIT
INPUT CHARACTERISTICS
Input voltage range V_IN	Operation	3.3	6	9	V
OUTPUT CHARACTERISTICS
Output voltage V_OUT			12		V
Maximum output current I_OUT	VIN = 6V~9V		1.2		A
Maximum output current I_OUT	VIN = 3.3V~6V		0.6		A
Output Over-voltage V_{OUT_OV}			13.6		V
SYSTEM CHARACTERISTICS
Switching frequency			2.1		MHz
External clock synchronization		1.8		2.4	MHz
Full load efficiency	V_IN = 6V, I_OUT = 1.2A		92.4		%
Junction temperature, T_J		-40		150	C