Datasheet

LM5010A
LM5010A-Q1
SNVS376E –OCTOBER 2005–REVISED FEBRUARY 2013 www.ti.com
Electrical Characteristics (continued)
Specifications with standard type are for T
J
= 25°C only; limits in boldface type apply over the full Operating Junction
Temperature (T
J
) range. Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical
values represent the most likely parametric norm at T
J
= 25°C, and are provided for reference purposes only. Unless
otherwise stated the following conditions apply: V
IN
= 48V, R
ON
= 200kΩ. See
(1)
.
Symbol Parameter Conditions Min Typ Max Unit
Switch Characteristics
R
DS(on)
Buck Switch R
DS(on)
at I
SW
= 200 T
J
≤ 125°C 0.35 0.80 Ω
mA
T
J
≤ 150°C 0.85
UVLO
GD
Gate Drive UVLO V
BST
- V
SW
Increasing 1.7 3.0 4.0 V
UVLO
GD
hysteresis 400 mV
SOFT-START Pin
I
SS
Internal current source 8.0 11.5 15 µA
Current Limit
I
LIM
Threshold Current out of I
SEN
1 1.25 1.5 A
Resistance from ISEN to SGND 130 mΩ
Response time 150 ns
On Timer, RON/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 290 390 496 ns
Shutdown threshold Voltage at RON/SD rising 0.30 0.7 1.05 V
Threshold hysteresis 40 mV
Off Timer
t
OFF
Minimum Off-time 260 ns
Regulation and Over-Voltage Comparators (FB Pin)
V
REF
FB regulation threshold T
J
≤ 125°C 2.445 2.50 2.550 V
T
J
≤ 150°C 2.435
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, 0 LFPM Air WSON-10 Package 40 °C/W
Flow
HTSSOP-14 Package 40
θ
JC
Junction to Case WSON-10 Package 5.2 °C/W
HTSSOP-14 Package 5.2
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