Datasheet

LM5010
SNVS307F –SEPTEMBER 2004–REVISED FEBRUARY 2013 www.ti.com
Electrical Characteristics (continued)
Specifications with standard typeface are for T
J
= 25°C, and those with boldface type apply over full Operating Junction
Temperature range. V
IN
= 48V, R
ON
= 200kΩ, unless otherwise stated
(1)
and
(2)
.
Symbol Parameter Test Conditions Min Typ Max Unit
Switch Characteristics
Rds(on) Buck Switch Rds(on) I
TEST
= 200 mA 0.35 0.80 Ω
UVLO
GD
Gate Drive UVLO V
BST
- V
SW
Increasing 3.0 4.3 5.0 V
UVLO
GD
hysteresis 440 mV
Softstart Pin
Pull-up voltage 2.5 V
Internal current source 11.5 µA
Current Limit
I
LIM
Threshold Current out of I
SEN
1 1.25 1.5 A
Resistance from I
SEN
to S
GND
130 mΩ
Response time 150 ns
On Timer, R
ON
/SD Pin
t
ON
- 1 On-time V
IN
= 10V, R
ON
= 200 kΩ 2.1 2.75 3.4 µs
t
ON
- 2 On-time V
IN
= 75V, R
ON
= 200 kΩ 290 390 490 ns
Shutdown threshold Voltage at R
ON
/SD rising 0.35 0.65 1.1 V
Threshold hysteresis Voltage at R
ON
/SD falling 40 mV
Off Timer
t
OFF
Off-time 265 ns
Regulation and Over-Voltage Comparators (FB Pin)
V
REF
FB regulation threshold SS pin = steady state 2.445 2.5 2.550 V
FB over-voltage threshold 2.9 V
FB bias current 1 nA
Thermal Shutdown
T
SD
Thermal shutdown temperature 175 °C
Thermal shutdown hysteresis 20 °C
Thermal Resistance
θ
JA
Junction to Ambient WSON-10 Package 40
°C/W
HTSSOP-14 Package 40
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