EVM Characteristics
5
SNVU623B – October 2018 – Revised April 2020
Copyright © 2018–2020, Texas Instruments Incorporated
LM5143-Q1 EVM User's Guide
2
EVM Characteristics
(1)
The default output voltages of this EVM are 3.3 V and 5 V. Efficiency and other performance metrics can change based on
operating input voltage, load currents, externally-connected output capacitors, and other parameters.
(2)
The recommended airflow when operating at input voltages greater than 18 V is 100 LFM.
Table 2. Electrical Performance Characteristics
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
INPUT CHARACTERISTICS
Input voltage range, V
IN
Operating
5.5
12
36
V
Input current, no load, I
IN-NL
I
OUT1
= I
OUT2
= 0 A,
MODE tied to AGND
V
IN
= 12 V
50
µA
V
IN
= 24 V
50
V
IN
= 36 V
50
Input current, disabled, I
IN-OFF
V
EN1
= V
EN2
= 0 V
V
IN
= 12 V
4
µA
OUTPUT CHARACTERISTICS
Output voltage, V
OUT1
(1)
FB1 tied to VDDA
3.27
3.3
3.33
V
Output voltage, V
OUT2
(1)
FB2 tied to AGND
4.95
5.0
5.05
Output current, I
OUT1/2
V
IN
= 5.5 V to 36 V, Airflow = 100 LFM
(2)
0
7
A
Output voltage regulation,
Δ
V
OUT1/2
Load regulation
I
OUT1/2
= 0 A to 7 A
0.5%
Line regulation
V
IN
= 5.5 V to 36 V
0.5%
Output voltage ripple, V
OUT1/2-AC
V
IN
= 12 V, I
OUT1
= I
OUT2
= 7 A
10
mVrms
Output overcurrent protection, I
OCP
V
IN
= 12 V
9
A
Soft-start time, t
SS
C
SS1
= C
SS2
= 100 nF
3
ms
Hiccup time, t
RES
C
RES
= 220 nF
13
ms
SYSTEM CHARACTERISTICS
Switching frequency, F
SW-nom
V
IN
= 12 V
2.1
MHz
Half-load efficiency,
η
HALF
(1)
I
OUT1
= I
OUT2
= 3.5 A
V
IN
= 8 V
91.5%
V
IN
= 12 V
90.5%
V
IN
= 18 V
87%
Full load efficiency,
η
FULL
I
OUT1
= I
OUT2
= 7 A
V
IN
= 8 V
89.5%
V
IN
= 12 V
90.2%
V
IN
= 18 V
88.2%
LM5143-Q1 junction temperature, T
J
–40
150
ºC
