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LM2694MTX Datenblatt(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Teilenummer LM2694MTX
Bauteilbeschribung  30V, 600 mA Step Down Switching Regulator
Download  19 Pages
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Hersteller  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2694MTX Datenblatt(HTML) 4 Page - National Semiconductor (TI)

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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
33V
BST to RTN
47V
SW to RTN (Steady State)
-1.5V
ESD Rating (Note 2)
Human Body Model
2kV
BST to VCC
33V
VIN to SW
33V
BST to SW
14V
VCC to RTN
14V
SGND to RTN
-0.3V to +0.3V
SS to RTN
-0.3V to 4V
All Other Inputs to RTN
-0.3 to 7V
Storage Temperature Range
-65˚C to +150˚C
JunctionTemperature
150˚C
Operating Ratings (Note 1)
VIN
8.0V to 30V
Junction Temperature
−40˚C to + 125˚C
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, RON = 200k
Ω. See (Note 5).
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Start-Up Regulator, V
CC
V
CCReg
V
CC regulated output
6.6
7
7.4
V
V
IN-VCC dropout voltage
I
CC = 0 mA,
V
CC = UVLOVCC + 250 mV
1.3
V
V
CC output impedance
0 mA
≤ I
CC
≤ 5 mA, V
IN = 8V
175
V
CC current limit (Note 3)
V
CC =0V
9
mA
UVLO
VCC
V
CC under-voltage lockout
threshold
V
CC increasing
5.7
V
UVLO
VCC hysteresis
V
CC decreasing
150
mV
UVLO
VCC filter delay
100 mV overdrive
3
µs
I
IN operating current
Non-switching, FB = 3V
0.5
0.8
mA
I
IN shutdown current
RON/SD = 0V
90
180
µA
Switch Characteristics
Rds(on)
Buck Switch Rds(on)
I
TEST = 200 mA
0.5
1.0
UVLO
GD
Gate Drive UVLO
V
BST -VSW Increasing
3.0
4.4
5.5
V
UVLO
GD hysteresis
490
mV
Softstart Pin
Pull-up voltage
2.5
V
Internal current source
12
µA
Current Limit
I
LIM
Threshold
Current out of ISEN
0.5
0.62
0.74
A
Resistance from ISEN to
SGND
180
m
Response time
150
ns
On Timer
t
ON - 1
On-time
V
IN = 10V, RON = 200 k
2.1
2.8
3.6
µs
t
ON - 2
On-time
V
IN = 30V, RON = 200 k
900
ns
Shutdown threshold
Voltage at RON/SD rising
0.45
0.8
1.2
V
Threshold hysteresis
Voltage at RON/SD falling
35
mV
Off Timer
t
OFF
Minimum Off-time
265
ns
Regulation and Over-Voltage Comparators (FB Pin)
V
REF
FB regulation threshold
SS pin = steady state
2.440
2.5
2.550
V
FB over-voltage threshold
2.9
V
www.national.com
4


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