LT3759(RevB) 데이터 시트보기 (PDF) - Linear Technology
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LT3759 Datasheet PDF : 32 Pages
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LT3759
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VIN = 12V, EN/UVLO = 12V, INTVCC = 4.75V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
VIN Operating Voltage
VIN Shutdown IQ
EN/UVLO < 0.4V
EN/UVLO = 1.15V
l
1.6
42
V
0.1
1
μA
6
μA
VIN Operating IQ
DRIVE Shutdown Quiescent Current
EN/UVLO < 0.4V
EN/UVLO = 1.15V
350
450
μA
0.1
1
μA
0.1
2
μA
DRIVE Quiescent Current (Not Switching)
SENSE Current Limit Threshold
RT = 27.4kΩ, DRIVE = 6V
l
46
2.0
2.5
mA
50
54
mV
SENSE Input Bias Current
Current Out of Pin
–55
μA
Error Amplifier
FBX Regulation Voltage (VFBX(REG))
FBX > 0V
FBX < 0V
l
1.580
1.6
1.620
V
l –0.815
–0.80
–0.785
V
FBX Pin Input Current
FBX = 1.6V
FBX = –0.8V
60
120
nA
–10
10
nA
Transconductance gm (ΔI2/ΔVFBX)
VC Output Impedance
FBX = VFBX(REG)
240
μs
5
MΩ
FBX Line Regulation [ΔVFBX(REG)/(ΔVIN • VFBX(REG))]
VC Current Mode Gain (ΔVVC/ΔVSENSE)
VC Source Current
1.6V < VIN < 42V, FBX >0
1.6V < VIN < 42V, FBX <0
FBX = 0V, VC = 1.3V
0.02
0.05
%/V
0.02
0.05
%/V
5
V/V
–13
μA
VC Sink Current
FBX = 1.7V, VC = 1.3V
FBX = –0.85V, VC = 1.3V
13
μA
10
μA
Oscillator
Switching Frequency
RT Voltage
GATE Minimum Off-Time
RT = 27.4k to GND, VFBX = 1.6V
RT = 86.6k to GND, VFBX = 1.6V
RT = 6.81k to GND, VFBX = 1.6V
FBX = 1.6V, –0.8V
270
300
330
kHz
100
kHz
1000
kHz
1.2
V
170
200
ns
GATE Minimum On-Time
170
200
ns
SYNC Input Low
l
0.4
V
SYNC Input High
l
1.5
V
SS Pull-Up Current
SS = 0V, Current Out of Pin
l
–14
–10.5
–7
μA
Low Dropout Regulators (DRIVE LDO and VIN LDO)
DRIVE LDO Regulation Voltage
DRIVE = 6V
l
4.6
4.75
4.9
V
VIN LDO Regulation Voltage
DRIVE LDO Current Limit
VIN LDO Current Limit
DRIVE LDO Load Regulation (ΔVINTVCC/VINTVCC)
DRIVE = 0V
l
3.6
INTVCC = 4V
DRIVE = 0V, INTVCC = 3V
0 < IINTVCC < 20mA, DRIVE = 6V
–1
3.75
3.9
V
60
mA
60
mA
–0.6
%
VIN LDO Load Regulation (ΔVINTVCC/VINTVCC)
DRIVE = 0V, 0 < IINTVCC < 20mA
–1
DRIVE LDO Line Regulation [ΔVINTVCC/(VINTVCC • ΔVIN)] 1.6V < VIN < 42V, DRIVE = 6V
VIN LDO Line Regulation [ΔVINTVCC/(VINTVCC • ΔVIN)] DRIVE = 0V, 5V < VIN < 42V
DRIVE LDO Dropout Voltage (VDRIVE – VINTVcc)
DRIVE = 4V, IINTVCC = 20mA
l
–0.6
%
0.03
0.07
%/V
0.03
0.07
%/V
190
400
mV
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