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LM5017MR 数据手册 - TI（德州仪器）
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LM5017MR数据手册
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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the Texas Instruments Sales Office/
Distributors for availability and specifications.
V
IN
, UVLO to RTN -0.3 V to 100 V
SW to RTN -1.5 V to V
IN
+0.3 V
BST to V
CC
100 V
BST to SW 13 V
R
ON
to RTN -0.3 V to 100 V
V
CC
to RTN -0.3 V to 13 V
FB to RTN -0.3 V to 5 V
ESD Rating (Human Body Model(Note
5)
2 kV
Lead Temperature (Note 2) 200°C
Storage Temperature Range -55°C to +150°C
Operating Ratings (Note 1)
V
IN
Voltage
9 V to 100 V
Operating Junction Temperature −40°C to +125°C
Electrical Characteristics
Specifications with standard typeface are for T
J
= 25°C, and those with boldface type apply over full Operating Junction Temper-
ature range. V
IN
= 48 V, unless otherwise stated. See (Note 3).
Symbol Parameter Conditions Min Typ Max Units
V
CC
Supply
V
CC
Reg V
CC
Regulator Output V
IN
= 48 V, I
CC
= 20 mA 6.25 7.6 8.55 V
V
CC
Current Limit V
IN
= 48 V(Note 4) 26 mA
V
CC
Undervoltage Lockout
Voltage (V
CC
increasing)
4.15 4.5 4.9 V
V
CC
Undervoltage Hysteresis 300
mV
V
CC
Drop Out Voltage V
IN
= 9 V, I
CC
= 20 mA 2.3
V
I
IN
Operating Current Non-Switching, FB = 3 V 1.75 mA
I
IN
Shutdown Current UVLO = 0 V 50 225 µA
Switch Characteristics
Buck Switch R
DS(ON)
I
TEST
= 200 mA, BST-SW =
7 V
0.8 1.8
Ω
Synchronous R
DS(ON)
I
TEST
= 200 mA 0.45 1
Ω
Gate Drive UVLO V
BST
− V
SW
Rising 2.4 3 3.6 V
Gate Drive UVLO Hysteresis 260 mV
Current Limit
Current Limit Threshold 0.7 1.02 1.3 A
Current Limit Response Time Time to Switch Off 150 ns
OFF-Time Generator (Test 1) FB = 0 V, V
IN
= 48 V 12 µs
OFF-Time Generator (Test 2) FB = 1 V, V
IN
= 48 V 2.5 µs
On-Time Generator
T
ON
Test 1 V
IN
= 32 V, R
ON
= 100 k 270 350 460 ns
T
ON
Test 2 V
IN
= 48 V, R
ON
= 100 k 188 250 336 ns
T
ON
Test 3 V
IN
= 75 V, R
ON
= 250 k 250 370 500 ns
T
ON
Test 4 V
IN
= 10 V, R
ON
= 250 k 1880 3200 4425 ns
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