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LM25119 数据表(PDF) 6 Page - Texas Instruments

部件名 LM25119
功能描述  LM25119/LM25119Q Wide Input Range Dual Synchronous Buck Controller
Download  34 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

LM25119 数据表(HTML) 6 Page - Texas Instruments

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LM25119/25119Q
SNVS680G – AUGUST 2010 – REVISED JANUARY 2014
www.ti.com
Electrical Characteristics
Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature range of –40°C to
+125°C. Unless otherwise specified, the following conditions apply: VIN = 12 V, VCC = 8 V, VCCDIS = 0 V, EN2 = 5 V, RT =
25 k
Ω, no load on LO and HO. Electrical characteristics are per channel where applicable. See
(1), (2), and (3).
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VIN Supply
IBIAS
VIN Operating Current
SS1 = SS2 = 0 V
6
7.3
mA
VCCDIS = 2 V, SS1 = SS2 = 0 V
340
500
µA
IVCC
VCC1 Operating Current
VCCDIS = 2 V, SS1 = SS2 = 0 V
3.9
4.5
mA
VCC2 Operating Current
VCCDIS = 2 V, SS1 = SS2 = 0 V
1.4
2.0
mA
ISHUTDOWN
VIN Shutdown Current
UVLO = 0 V, SS1 = SS2 = 0 V
15
33
µA
VCC Regulator(4)
VCC(REG)
VCC Regulation
6.77
7.6
8.34
V
VCC Regulation
VIN = 4.5 V, No external load
4.4
4.46
V
VCC Sourcing Current Limit
VCC = 0 V
25
40
mA
VCCDIS Switch Threshold
VCCDIS Rising
1.19
1.25
1.29
V
VCCDIS Switch Hysteresis
0.07
V
VCCDIS Input Current
VCCDIS = 0 V
–20
nA
VCC Under-voltage Threshold
Positive going VCC
3.8
4.0
4.2
V
VCC Under-voltage Hysteresis
0.2
V
EN2 Input
VIL
EN2 Input Low Threshold
2.0
1.5
V
VIH
EN2 Input High Threshold
2.9
2.5
V
EN2 Input pull-up resistor
50
k
UVLO
UVLO Threshold
UVLO Rising
1.20
1.25
1.29
V
UVLO Hysterisis Current
UVLO = 1.4 V
15
20
25
µA
UVLO Shutdown Threshold
0.4
V
UVLO Shutdown Hysterisis Voltage
0.1
V
Soft Start
SS Current Source
SS = 0 V
7
10
13
µA
SS Pull Down RDSON
10
Error Amplifier
VREF
FB Reference Voltage
Measured at FB pin, FB = COMP
0.788
0.8
0.812
V
FB Input Bias Current
FB = 0.8 V
1
nA
FB Disable Threshold
Interleaved Threshold
2.5
V
COMP VOH
Isource = 3mA
2.8
V
COMP VOL
Isink = 3mA
0.31
V
AOL
DC Gain
80
dB
fBW
Unity Gain Bandwidth
3
MHz
PWM Comparators
tHO(OFF)
Forced HO Off-time
220
320
430
ns
tON(min)
Minimum HO On-time
CRAMP = 50 pF
100
ns
(1)
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which
the device is intended to be functional. For specifications and test conditions see the Electrical Characteristics Table.
(2)
All limits are specified. All electrical characteristics having room temperature limits are tested during production at TA = 25°C. All hot and
cold limits are specified by correlating the electrical characteristics to process and temperature variations and applying statistical process
control.
(3)
Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through correlation
using Statistical Quality Control (SQC) methods. Limits are used to calculate Texas Instrument's Average Outgoing Quality Level
(AOQL).
(4)
Per VCC Regulator
6
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Copyright © 2010–2014, Texas Instruments Incorporated
Product Folder Links: LM25119/25119Q


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