LM5157EVM-BST Evaluation Module

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The LM5157EVM-BST supports the following features and performance capabilities:

Tightly regulated output voltage of 12 V 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
2.1-MHz switching frequency
External clock synchronization
Programmable dual random spread spectrum reduces the EMI

Table 1-1 Electrical Performance Standard Configuration

PARAMETER	TEST CONDITIONS	MIN	TYP	MAX	UNIT
INPUT CHARACTERISTICS
Input voltage range V_IN	Operation	3	6	9	V
OUTPUT CHARACTERISTICS
Output Voltage V_OUT			12		V
Maximum output current I_OUT	VIN = 6 V~9 V		1.6		A
Maximum output current I_OUT	VIN = 4 V~6 V		0.8		A
Output Over-voltage V_{OUT_OV}			13.6		V
SYSTEM CHARACTERISTICS
Switching frequency			2.1		MHz
External clock synchronization		1.8		2.4	kHz
Full load efficiency	V_IN = 6 V, I_OUT = 1.6 A		92.2		%
Junction temperature, T_J		-40		150	C