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LM25141-Q1 Datasheet(PDF) 7 Page - Texas Instruments

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No. de pieza LM25141-Q1
Descripción Electrónicos  2.2-MHz, 42-V Synchronous Buck Controller With Low IQ
Download  49 Pages
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

LM25141-Q1 Datasheet(HTML) 7 Page - Texas Instruments

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LM25141-Q1
www.ti.com
SNVSAP9 – MARCH 2017
Product Folder Links: LM25141-Q1
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Copyright © 2017, Texas Instruments Incorporated
Electrical Characteristics (continued)
TJ = –40°C to +125°C, Typical values TJ = 25°C, VIN = 12 V, VCCX = 5 V, VOUT = 5 V, EN = 5 V, OSC = VDD, FSW = 2.2
MHz, no-load on the Drive Outputs (HO, HOL, LO, and LOL outputs), over operating free-air temperature range (unless
otherwise noted)
(1)(2)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
FB(EXTRES)
Thevenin equivalent resistance at
FB for external regulation detection
FB < 2 V
5
TRANSCONDUCTANCE AMPLIFIER
Gm
Gain
Feedback to COMP
1010
1200
µS
Input bias current
15
nA
Transconductance Amplifier source
current
COMP = 1 V, FB = 1 V
100
µA
Transconductance Amplifier sink
current
COMP = 1 V, FB = 1.4 V
100
µA
POWER GOOD
PG(UV)
PG undervoltage trip levels
Falling with respect to the regulation
voltage
90%
92%
94%
PG(OVP)
PG overvoltage trip levels
Rising with respect to the regulation
voltage
108%
110%
112%
PG(HYST)
3.4%
PG(VOL)
PG
Open collector, Isink = 2 mA
0.4
V
PG(rdly)
OV filter time
VOUT rising
25
µs
PG(fdly)
UV filter time
VOUT falling
30
µs
HO GATE DRIVER
VOLH
HO low-state output voltage
IHO = 100 mA
0.05
V
VOHH
HO high-state output voltage
IHO = –100 mA, VOHH = VHB – VHO
0.07
V
trHO
HO rise time (10% to 90%)
CLOAD = 2700 pf
4
ns
tfHO
HO fall time (90% to 10%)
CLOAD = 2700 pf
3
ns
IOHH
HO peak source current
VHO = 0 V, SW = 0 V, HB = 5 V,
VCCX = 5 V
3.25
Apk
IOLH
HO peak sink current
VCCX = 5 V
4.25
Apk
V(BOOT)
UVLO
HO falling
2.5
V
Hysteresis
110
mV
I(BOOT)
Quiescent current
3
µA
LO GATE DRIVER
VOLL
LO low-state output voltage
ILO = 100 mA
0.05
V
VOHL
LO high-state output voltage
ILO = –100 mA, VOHL = VCC – VLO
0.07
V
trLO
LO rise time (10% to 90%)
CLOAD = 2700 pf
4
ns
tfLO
LO fall time (90% to 10%)
CLOAD = 2700 pf
3
ns
IOHL
LO peak source current
VCCX = 5 V
3.25
Apk
IOLL
LO peak sink current
VCCX = 5 V
4.25
Apk
ADAPTIVE DEAD TIME CONTROL
V(GS-DET)
VGS detection threshold
VGS falling, no-load
2.5
V
tdly1
HO off to LO on dead time
20
40
ns
tdly2
LO off to HO on dead time
20
38
ns
DIODE EMULATION
VIL
DEMB input low threshold
0.8
V
VIH
FPWM input high threshold
2.0
V
SW
Zero cross threshold
–5
mV
ENABLE INPUT
VIL
Enable input low threshold
VCCX = 0 V
0.8
V


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