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LM25011-Q1 Datenblatt(PDF) 4 Page - Texas Instruments

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Teilenummer LM25011-Q1
Bauteilbeschribung  42V 2A Constant On-Time Switching Regulator With Adjustable Current Limit
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Hersteller  TI [Texas Instruments]
Direct Link  http://www.ti.com
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LM25011, LM25011-Q1
SNVS617G – APRIL 2009 – REVISED FEBRUARY 2013
www.ti.com
ELECTRICAL CHARACTERISTICS
Specifications with standard type are for TJ = 25°C only; limits in boldface type apply over the full Operating Junction
Temperature (TJ) range. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical
values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless
otherwise stated the following conditions apply: VIN = 12V, RT = 50 kΩ.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Input (VIN Pin)
IIN
Input operating current
Non-switching, FB = 3V
1200
1600
µA
UVLOVIN
VIN under-voltage lock-out threshold
VIN Increasing
4.6
5.3
5.9
V
VIN under-voltage lock-out threshold
200
mV
hysteresis
Switch Characteristics
RDS(ON)
Buck Switch RDS(ON)
ITEST = 200 mA
0.3
0.6
UVLOGD
Gate Drive UVLO
BST-SW
2.4
3.4
4.4
V
UVLOGD Hysteresis
350
mV
Pre-charge switch voltage
ITEST = 10 mA into SW pin
1.4
V
Pre-charge switch on-time
120
ns
Soft-Start Pin
VSS
Pull-up voltage
2.51
V
ISS
Internal current source
10
µA
VSS-SH
Shutdown Threshold
70
140
mV
Current Limit
VILIM
Threshold voltage at CS
-146
-130
-115
mV
CS bias current
FB = 3V
-120
µA
CSG bias current
FB = 3V
-35
µA
On Timer, RT Pin
tON - 1
On-time
VIN = 12V, RT = 50 kΩ
150
200
250
ns
tON - 2
On-time
VIN = 32V, RT = 50 kΩ
75
ns
tON - 3
On-time (current limit) LM25011
VIN = 12V, RT = 50 kΩ
100
ns
tON - 3
On-time (current limit) LM25011A
VIN = 12V, RT = 50 kΩ
200
ns
tON - 4
On-time
VIN = 12V, RT = 301 kΩ
1020
ns
tON - 5
On-time
VIN = 9V, RT = 30.9 kΩ
130
171
215
ns
tON - 6
On-time
VIN = 12V, RT = 30.9 kΩ
105
137
170
ns
tON - 7
On-time
VIN = 16V, RT = 30.9 kΩ
79
109
142
ns
Off Timer
tOFF
Minimum Off-time (LM25011)
90
150
208
ns
Minimum Off-time (LM25011A)
52
75
93
Regulation Comparator (FB Pin)
VREF
FB regulation threshold
SS pin = steady state
2.46
2.51
2.56
V
FB bias current
FB = 3V
100
nA
Power Good (PGD pin)
Threshold at FB, with respect to VREF
FB increasing
91
95
%
Threshold hysteresis
3.3
%
PGDVOL
Low state voltage
IPGD = 1mA, FB = 0V
125
180
mV
PGDLKG
Off state leakage
VPGD = 7V, FB = 3V
0.1
µA
4
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Product Folder Links: LM25011 LM25011-Q1


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