7
LM5025A
www.ti.com
SNVS293F –DECEMBER 2004–REVISED AUGUST 2016
Product Folder Links: LM5025A
Submit Documentation FeedbackCopyright © 2004–2016, Texas Instruments Incorporated
Electrical Characteristics (continued)
Typical limits are for T
J
= 25°C, and minimum and maximum limits apply over the operating junction temperature range
(–40°C to 125°C). V
IN
= 48 V, V
CC
= 10 V, RT = 31.3 kΩ, R
SET
= 27.4 k Ω) unless otherwise stated
(1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SOFT-START
Soft-start current source
normal
T
J
= 25°C 22
µA
over full operating junction temperature 17 27
Soft-start current source
following a CS2 event
T
J
= 25°C 1
µA
over full operating junction temperature 0.5 1.5
OSCILLATOR
Frequency1
T
A
= 25°C, 180 200 220
kHz
T
J
= T
low
to T
high
175 225
Frequency2 RT = 10.4 kΩ
T
A
= 25°C, 580
kHz
T
J
= T
low
to T
high
510 650
Sync threshold 2 V
Min sync pulse width T
J
= T
low
to T
high
100 ns
Sync frequency range T
J
= T
low
to T
high
160 kHz
PWM COMPARATOR
Delay to output
COMP step 5 V to 0 V,
Time to onset of OUT_A transition low
40 ns
Duty cycle range T
J
= T
low
to T
high
0% 80%
COMP to PWM offset
T
A
= 25°C, 1
V
T
J
= T
low
to T
high
0.7 1.3
COMP open-circuit voltage T
J
= T
low
to T
high
4.3 5.9 V
COMP short-circuit current COMP = 0 V
T
A
= 25°C, 1
mA
T
J
= T
low
to T
high
0.6 1.4
VOLT × SECOND CLAMP
Ramp clamp level
Delta RAMP
measured from onset
of OUT_A to Ramp
peak,
COMP = 5 V
T
A
= 25°C, 2.5
V
T
J
= T
low
to T
high
2.4 2.6
UVLO SHUTDOWN
Undervoltage shutdown
threshold
T
A
= 25°C, 2.5
V
T
J
= T
low
to T
high
2.44 2.56
Undervoltage shutdown
hysteresis
T
A
= 25°C, 20
µA
T
J
= T
low
to T
high
16 24
OUTPUT SECTION
OUT_A high saturation
MOS device at
Iout = –10 mA
T
A
= 25°C, 5
Ω
T
J
= T
low
to T
high
10
OUTPUT_A peak current
sink
Bipolar Device at Vcc/2 3 A
OUT_A low saturation
MOS device at
Iout = 10 mA
T
A
= 25°C, 6
Ω
T
J
= T
low
to T
high
9
OUTPUT_A rise time C
gate
= 2.2 nF 20 ns
OUTPUT_A fall time C
gate
= 2.2 nF 15 ns
OUT_B high saturation
MOS device at
Iout = –10 mA
T
A
= 25°C, 10
Ω
T
J
= T
low
to T
high
20
OUTPUT_B peak current
sink
Bipolar device at Vcc/2 1 A
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