Datasheet

LTM8033
3
8033fa
For more information www.linear.com/LTM8033
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage
l
3.6 V
Output DC Voltage 0 < I
OUT
< 3A, R
ADJ
Open, V
IN
= 24V
0 < I
OUT
< 3A, R
ADJ
= 16.5k, V
IN
= 32V
0.8
24
V
V
Output DC Current V
IN
= 24V 0 3 A
Quiescent Current into V
IN
RUN/SS = 0V
Not Switching
BIAS = 0V, Not Switching
0.01
30
100
1
60
150
µA
µA
µA
Quiescent Current into BIAS RUN/SS = 0V
Not Switching
BIAS = 0V, Not Switching
0.01
75
0
0.5
120
5
µA
µA
µA
Line Regulation 5.5V < V
IN
< 36V 0.3 %
Load Regulation 0A < I
OUT
< 3A, V
IN
= 24V 0.4 %
Output RMS Voltage Ripple V
IN
= 24V, 0A < I
OUT
< 3A 5 mV
Switching Frequency R
T
= 45.3k 780 kHz
Voltage at ADJ Pin
l
775 790 805 mV
Current Out of ADJ Pin ADJ = 1V, V
OUT
= 0V 2 µA
Minimum BIAS Voltage for Proper Operation 2 2.8 V
RUN/SS Pin Current RUN/SS = 2.5V 5 10 µA
RUN/SS Input High Voltage 2.5 V
RUN/SS Input Low Voltage 0.2 V
PGOOD Threshold (at ADJ) V
OUT
Rising 730 mV
PGOOD Leakage Current PGOOD = 30V, RUN/SS = 0V 0.1 1 µA
PGOOD Sink Current PGOOD = 0.4V 200 735 µA
SYNC Input Low Threshold f
SYNC
= 550kHz 0.5 V
SYNC Input High Threshold f
SYNC
= 550kHz 0.7 V
SYNC Bias Current SYNC = 0V 0.1 µA
500kHz Narrowband Conducted Emissions 24V
IN
, 3.3V
OUT
, I
OUT
= 3A, 5µH LISN 89
69
51
dBµV
dBµV
dBµV
1MHz Narrowband Conducted Emissions
3MHz Narrowband Conducted Emissions
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V, RUN/SS = 12V unless otherwise noted (Note 2).
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTM8033E is guaranteed to meet performance specifications
from 0°C to 125°C internal. Specifications over the full –40°C to
125°C internal operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTM8033I is guaranteed to meet specifications over the full –40°C
to 125°C internal operating temperature range. The LTM8033MP is
guaranteed to meet specifications over the full –55°C to 125°C internal
operating temperature range. Note that the maximum internal temperature
is determined by specific operating conditions in conjunction with board
layout, the rated package thermal resistance and other environmental
factors.