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LM25116 データシート(PDF) 5 Page - Texas Instruments

部品番号 LM25116
部品情報  Wide Range Synchronous Buck Controller
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
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LM25116 データシート(HTML) 5 Page - Texas Instruments

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LM25116
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SNVS509C – APRIL 2007 – REVISED AUGUST 2011
Electrical Characteristics (continued)
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 and are provided for reference only. Unless otherwise specified, the following conditions apply: VIN = 24V, VCC =
7.4V, VCCX = 0V, EN = 5V, RT = 16 kΩ, no load on LO and HO.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VCCX Switch Threshold
VCCX Rising
4.3
4.5
4.7
V
VCCX Switch Hysteresis
0.25
V
VCCX Switch RDS(ON)
ICCX = 10 mA
3.8
6.2
VCCX Leakage
VCCX = 0V
-200
nA
VCCX Pull- down Resistance
VCCX = 3V
100
k
VCC Under-voltage Threshold
VCC Rising
4.3
4.5
4.7
V
VCC Under-voltage Hysteresis
0.2
V
HB DC Bias Current
HB - SW = 15V
125
200
µA
EN Input
VIL max
EN Input Low Threshold
0.5
V
VIH min
EN Input High Threshold
3.3
V
EN Input Bias Current
VEN = 3V
-7.5
-3
1
µA
EN Input Bias Current
VEN = 0.5V
-1
0
1
µA
EN Input Bias Current
VEN = 42V
15
µA
UVLO Thresholds
UVLO Standby Threshold
UVLO Rising
1.170
1.215
1.262
V
UVLO Threshold Hysteresis
0.1
V
UVLO Pull-up Current Source
UVLO = 0V
5.4
µA
UVLO Pull-down RDS(ON)
80
210
Soft Start
SS Current Source
SS = 0V
8
11
14
µA
SS Diode Emulation Ramp Disable
SS Rising
3
V
Threshold
SS to FB Offset
FB = 1.25V
160
mV
SS Output Low Voltage
Sinking 100 µA, UVLO = 0V
45
mV
Error Amplifier
VREF
FB Reference Voltage
Measured at FB pin, FB = COMP
1.195
1.215
1.231
V
FB Input Bias Current
FB = 2V
15
500
nA
COMP Sink/Source Current
3
mA
AOL
DC Gain
80
dB
fBW
Unity Gain Bandwidth
3
MHz
PWM Comparators
tHO(OFF)
Forced HO Off-time
320
450
580
ns
tON(min)
Minimum HO On-time
VIN = 42V, CRAMP = 50 pF
100
ns
Oscillator
fSW1
Frequency 1
RT = 16 k
180
200
220
kHz
fSW2
Frequency 2
RT = 5 k
480
535
590
kHz
RT output voltage
1.191
1.215
1.239
V
RT sync positive threshold
3.0
3.5
4.0
V
Current Limit
VCS(TH)
Cycle-by-cycle Sense Voltage
VCCX = 0V, RAMP = 0V
94
110
126
mV
Threshold (CSG - CS)
VCS(THX)
Cycle-by-cycle Sense Voltage
VCCX = 5V, RAMP = 0V
105
122
139
mV
Threshold (CSG - CS)
CS Bias Current
CS = 42V
-1
1
µA
CS Bias Current
CS = 0V
90
125
µA
Copyright © 2007–2011, Texas Instruments Incorporated
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