Features and Electrical Performance
3
SNVU696A – February 2020 – Revised June 2020
Copyright © 2020, Texas Instruments Incorporated
LM5156EVM-BST User's Guide
1
Features and Electrical Performance
The LM5156EVM-BST supports the following features and performance capabilities:
•
Tightly regulated output voltage of 12 V with 1% accurate reference voltage
•
High conversion efficiency of > 95% at full load.
•
Constant cycle-by-cycle peak inductor current limit over input voltage range
•
User adjustable soft-start time using C
SS
•
Output over-voltage protection
•
Multiple BIAS pin and VCC pin connections to test multiple configurations
–
BIAS connect to VCC
–
BIAS supplied with external power supply
–
VCC supplied by external power supply
–
BIAS supplied by output voltage
•
Power good (PGOOD) indicator with selectable pull-up source
•
440kHz Switching frequency
•
External clock synchronization
•
Programable slope compensation
1.1
Electrical Parameters
Table 1. Electrical Performance Standard Configuration
Parameter
Test Conditions
MIN
TYP
MAX
UNIT
INPUT CHARACTERISTICS
Input voltage Range V
IN
Static, full load operation
4
9
12
V
Transient: (50% load)
3
Input voltage turn on V
IN(ON)
Initial turn-on
5
V
Input voltage turn off V
IN(OFF)
Adjusted by the UVLO/SYNC resistors
2.5
V
OUTPUT CHARACTERISTICS
Output Voltage V
OUT
12
V
Maximum Output Current I
OUT
3
A
Output Over-voltage V
OUT_OV
13.22
V
SYSTEM CHARACTERISTICS
Switching frequency
440
kHz
External Clock Synchronization
375
505
kHz
Full load efficiency
V
IN
= 4 V, I
OUT
= 3 A
95.6
%
Junction Temperature, T
J
-40
150
C
