參數(shù)資料
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VIN to RTN
BST to RTN
SW to RTN (Steady State)
BST to VCC
BST to SW
VCC to RTN
SGND to RTN
SS to RTN
-0.3V to 45V
-0.3V to 59V
-1.5V
45V
14V
-0.3V to 14V
-0.3V to +0.3V
-0.3V to 4V
VIN to SW
All Other Inputs to RTN
ESD Rating (Note 2)
Human Body Model
Storage Temperature Range
Lead Temperature (Soldering 4 sec) (Note 4)
45V
-0.3V to 7V
2kV
-65C to +150C
260C
Operating Ratings
(Note 1)
VIN Voltage
Junction Temperature
LM25010
6.0V to 42V
40C to + 125C
Electrical Charateristics
ply over the full Operating Junction Temperature (T
) range. Minimum and Maximum limits are guaranteed through test, de-
sign, or statistical correlation. Typical values represent the most likely parametric norm at T
J
= 25C, and are provided for ref-
erence purposes only. Unless otherwise stated the following conditions apply: V
IN
= 24V, R
ON
= 200k
. See (Note 5).
Specifications with standard type are for T
J
= 25C only; limits in boldface type ap-
Symbol
V
CC
Regulator
V
CC
Reg
Parameter
Conditions
Min
Typ
Max
Units
V
CC
regulated output
V
IN
- V
CC
6.6
7
7.4
Volts
mV
I
CC
= 0 mA, F
S
≤
200 kHz, 6.0V
≤
V
IN
≤
8.5V
V
IN
Increasing
V
IN
Decreasing
V
IN
= 6.0V
V
IN
= 8.0V
V
IN
= 24V
V
IN
= 24V, V
CC
= 0V
V
CC
Increasing
100
V
CC
Bypass Threshold
V
CC
Bypass Hysteresis
V
CC
output impedance
(0 mA
≤
I
CC
≤
5 mA)
8.9
260
55
50
0.21
15
5.25
V
mV
V
CC
current limit (Note 3)
V
CC
under-voltage lock-out
threshold
UVLO
VCC
hysteresis
UVLO
VCC
filter delay
I
IN
operating current
I
IN
shutdown current
mA
V
UVLOVcc
V
CC
Decreasing
100 mV overdrive
Non-switching, FB = 3V
RON/SD = 0V
180
3
645
90
mV
μs
μA
μA
920
170
Switch Characteristics
R
DS(on)
UVLO
GD
Buck Switch R
DS(on)
Gate Drive UVLO
UVLO
GD
hysteresis
I
SW
= 200mA
V
BST
- V
SW
Increasing
0.35
3.0
400
0.80
4.0
V
mV
1.7
SOFT-START Pin
I
SS
Current Limit
I
LIM
Internal current source
8.0
11.5
15
μA
Threshold
Resistance from ISEN to
SGND
Response time
Current out of I
SEN
1
1.25
130
1.5
A
m
150
ns
On Timer, RON/SD Pin
t
ON
- 1
t
ON
- 2
On-time
On-time
Shutdown threshold
Threshold hysteresis
V
IN
= 10V, R
ON
= 200 k
V
IN
= 42V, R
ON
= 200 k
Voltage at RON/SD rising
2.1
500
0.30
2.75
695
0.7
40
3.4
890
1.05
μs
ns
V
mV
L
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