LTM8050
3
8050fc
For more information www.linear.com/LTM8050
ELECTRICAL CHARACTERISTICS
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 LTM8050E 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
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage
l
3.6 V
Output DC Voltage 0 < I
OUT
≤ 2A; R
FB
Open
0 < I
OUT
≤ 2A; R
FB
= 16.9k; V
IN
= 32V
0.8
24
V
V
Output DC Current 0 2 A
Quiescent Current into V
IN
RUN/SS = 0V
Not Switching
BIAS = 0V, Not Switching
0.01
35
120
1
60
160
µA
µA
µA
Quiescent Current into BIAS RUN/SS = 0V
Not Switching
BIAS = 0V, Not Switching
0.01
82
1
0.5
120
5
µA
µA
µA
Line Regulation 5.5V < V
IN
< 58V, I
OUT
= 1A 0.3 %
Load Regulation 0A < I
OUT
< 2A 0.3 %
Output Voltage Ripple (RMS) 0A < I
OUT
< 2A 10 mV
Switching Frequency R
T
= 45.3k 750 kHz
Voltage (at FB Pin)
l
775
770
790 805
810
mV
mV
Internal Feedback Resistor 499 kΩ
Minimum BIAS V
oltage for Proper Operation 2.8 V
RUN/SS Pin Current RUN/SS = 2.5V 6 10 µA
RUN Input High Voltage 2.5 V
RUN Input Low Voltage 0.2 V
PGOOD Threshold (at FB Pin) V
OUT
Rising 730 mV
PGOOD Leakage Current PGOOD = 30V 0.1 1 µA
PGOOD Sink Current PGOOD = 0.4V 200 600 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
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, BIAS = 3V unless otherwise noted. (Note 2)
LTM8050I is guaranteed to meet specifications over the full –40°C
to 125°C internal operating temperature range. The LTM8050MP 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.
Note 3: Unless otherwise noted, the absolute minimum voltage is zero.
