Datasheet
LM25010
SNVS419D –DECEMBER 2005–REVISED FEBRUARY 2013
www.ti.com
Electrical Characteristics
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 guaranteed 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
= 24V, R
ON
= 200kΩ. See
(1)
.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT
V
CC
Regulator
V
CC
Reg V
CC
regulated output 6.6 7 7.4 V
V
IN
– V
CC
I
CC
= 0 mA, F
S
≤ 200 kHz, 6.0V ≤ V
IN
≤ 8.5V 100 mV
V
CC
bypass threshold V
IN
increasing 8.9 V
V
CC
bypass hysteresis V
IN
decreasing 260 mV
V
CC
output impedance V
IN
= 6.0V 55 Ω
(0 mA ≤ I
CC
≤ 5 mA)
V
IN
= 8.0V 50
V
IN
= 24V 0.21
V
CC
current limit (Note 3) V
IN
= 24V, V
CC
= 0V 15 mA
UVLOVcc V
CC
under-voltage lock-out V
CC
increasing 5.25 V
threshold
UVLO
VCC
hysteresis V
CC
decreasing 180 mV
UVLO
VCC
filter delay 100 mV overdrive 3 µs
I
IN
operating current Non-switching, FB = 3V 645 920 µA
I
IN
shutdown current RON/SD = 0V 90 170 µA
Switch Characteristics
R
DS(on)
Buck switch R
DS(on)
@ f
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
= 42V, R
ON
= 200 kΩ 500 695 890 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 DPR0010A Package 40 °C/W
flow PWP0014A Package 40
(1) Typical specifications represent the most likely parametric norm at 25°C operation.
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