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LM26420-Q0 Datasheet(PDF) 7 Page - Texas Instruments

No. de pieza LM26420-Q0
Descripción Electrónicos  Dual 2-A Automotive-Qualified, High-Efficiency Synchronous DC-DC Converter
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

LM26420-Q0 Datasheet(HTML) 7 Page - Texas Instruments

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LM26420, LM26420-Q0, LM26420-Q1
www.ti.com
SNVS579K – FEBRUARY 2009 – REVISED APRIL 2016
Product Folder Links: LM26420 LM26420-Q0 LM26420-Q1
Submit Documentation Feedback
Copyright © 2009–2016, Texas Instruments Incorporated
6.6 Electrical Characteristics Per Buck
Over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VFB
Feedback Voltage
0.788
0.8
0.812
V
ΔVFB/VIN
Feedback Voltage Line Regulation
VIN = 3 V to 5.5 V
0.05
%/V
IB
Feedback Input Bias Current
0.4
100
nA
UVLO
Undervoltage Lockout
VIN Rising
2.628
2.9
V
VIN Falling
2
2.3
V
UVLO Hysteresis
330
mV
FSW
Switching Frequency
LM26420-X
1.85
2.2
2.65
MHz
LM26420-Y
0.4
0.55
0.7
FFB
Frequency Fold-back
LM26420-X
300
kHz
LM26420-Y
150
DMAX
Maximum Duty Cycle
LM26420-X
86%
91.5%
LM26420-Y
90%
98%
RDSON_TOP
TOP Switch On Resistance
WQFN-16 Package
75
135
m
HTSSOP-20 Package
70
135
RDSON_BOT
BOTTOM Switch On Resistance
WQFN-16 Package
55
100
m
TSSOP-20 Package
45
80
ICL_TOP
TOP Switch Current Limit
VIN = 3.3 V
2.4
3.3
A
ICL_BOT
BOTTOM Switch Reverse Current
Limit
VIN = 3.3 V
0.4
0.75
A
ΔΦ
Phase Shift Between SW1 and SW2
160
180
200
°
VEN_TH
Enable Threshold Voltage
0.97
1.04
1.12
V
Enable Threshold Hysteresis
0.15
ISW_TOP
Switch Leakage
-0.7
µA
IEN
Enable Pin Current
Sink/Source
5
nA
VPG-TH-U
Upper Power Good Threshold
FB Pin Voltage Rising
848
925
1,008
mV
Upper Power Good Hysteresis
40
mV
VPG-TH-L
Lower Power Good Threshold
FB Pin Voltage Rising
656
710
791
mV
Lower Power Good Hysteresis
40
mV
IQVINC
VINC Quiescent Current (non-
switching) with both outputs on
LM26420X/Y VFB = 0.9 V
3.3
5.0
mA
VINC Quiescent Current (switching)
with both outputs on
LM26420X/Y VFB = 0.7 V
4.7
6.2
VINC Quiescent Current (shutdown)
All Options VEN = 0 V
0.05
µA
IQVIND
VIND Quiescent Current (non-
switching)
LM26420X/Y VFB = 0.9 V
0.9
1.5
mA
VIND Quiescent Current (switching)
LM26420X VFB = 0.7 V
11
15
LM26420Q0X VFB = 0.7 V
11
18
LM26420Y VFB = 0.7 V
3.7
7.5
VIND Quiescent Current (shutdown)
All Options VEN = 0 V
0.1
µA
TSD
Thermal Shutdown Temperature
165
°C


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