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LM25005 Datasheet(PDF) 6 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM25005
Description  42V, 2.5A STEP-DOWN SWITCHING REGULATOR
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM25005 Datasheet(HTML) 6 Page - National Semiconductor (TI)

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Electrical Characteristics Specifications with standard typeface are for T
J = 25˚C, and those with boldface
type apply over full Operating Junction Temperature range.V
IN = 24V, RT = 32.4k
Ω unless otherwise stated. (Note
3) (Continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
RAMP GENERATOR
Ramp Current 1
Vin = 36V, Vout=10V
136
160
184
µA
Ramp Current 2
Vin = 10V, Vout=10V
18
25
32
µA
PWM COMPARATOR
Forced Off-time
500
ns
Min On-time
80
ns
COMP to PWM Comparator Offset
0.7
V
ERROR AMPLIFIER
Feedback Voltage
Vfb = COMP
1.207
1.225
1.243
V
FB Bias Current
10
nA
DC Gain
70
dB
COMP Sink / Source Current
3
mA
Unity Gain Bandwidth
3
MHz
THERMAL SHUTDOWN
Tsd
Thermal Shutdown Threshold
165
˚C
Thermal Shutdown Hysteresis
25
˚C
THERMAL RESISTANCE
θ
JC
Junction to Case
4
˚C/W
θ
JA
Junction to Ambient
40
˚C/W
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device
is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The human body model is a 100pF capacitor discharged through a 1.5k
Ω resistor into each pin.
Note 3: Min and Max limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical
Quality Control (SQC) methods. Limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
www.national.com
6


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