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LTC3814-5 Datasheet, PDF (3/28 Pages) Linear Technology – 60V Current Mode Synchronous Step-Up Controller
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LTC3814-5
ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, INTVCC = VBOOST = VRNG = VEXTVCC = VNDRV = VOFF = 5V, unless
otherwise specified.
SYMBOL
PARAMETER
Main Control Loop
INTVCC
IQ
IBOOST
INTVCC Supply Voltage
INTVCC Supply Current
INTVCC Shutdown Current
BOOST Supply Current
VFB
Feedback Voltage
ΔVFB,LINE
VSENSE(MAX)
Feedback Voltage Line Regulation
Maximum Current Sense Threshold
VSENSE(MIN)
Minimum Current Sense Threshold
IVFB
AVOL(EA)
fU
VRUN/SS
IRUN/SS
VVCCUV
Oscillator
tOFF
tOFF(MIN)
tON(MIN)
Driver
IBG,PEAK
RBG,SINK
ITG,PEAK
RTG,SINK
PGOOD Output
ΔVFBOV
ΔVFB,HYST
VPGOOD
IPGOOD
Feedback Current
Error Amplifier DC Open-Loop Gain
Error Amp Unity Gain Crossover
Frequency
Shutdown Threshold
RUN/SS Source Current
INTVCC Undervoltage Lockout
Off-Time
Minimum Off-Time
Minimum On-Time
BG Driver Peak Source Current
BG Driver Pulldown RDS(ON)
TG Driver Peak Source Current
TG Driver Pulldown RDS(ON)
PGOOD Upper Threshold
PGOOD Lower Threshold
PGOOD Hysteresis
PGOOD Low Voltage
PGOOD Leakage Current
CONDITIONS
RUN/SS > 1.5V (Notes 4, 5)
RUN/SS = 0V
RUN/SS > 1.5V (Note 5)
RUN/SS = 0V
(Note 4)
0°C to 85°C
–40°C to 85°C
–40°C to 125°C (I-grade)
5V < INTVCC < 14V (Note 4)
VRNG = 2V, VFB = 0.76V
VRNG = 0V, VFB = 0.76V
VRNG = INTVCC, VFB = 0.76V
VRNG = 2V, VFB = 0.84V
VRNG = 0V, VFB = 0.84V
VRNG = INTVCC, VFB = 0.84V
VFB = 0.8V
(Note 6)
RUN/SS = 0V
INTVCC Rising
Hysteresis
IOFF = 100μA
IOFF = 300μA
IOFF = 2000μA
VBG = 0V
VTG – VSW = 0V
VFB Rising
VFB Falling
VFB Returning
IPGOOD = 5mA
VPGOOD = 5V
MIN TYP MAX
l 4.35
0.796
l 0.794
l 0.792
l 0.792
l
256
70
170
65
3
224
240
0
0.800
0.800
0.800
0.800
0.002
320
95
215
–300
–85
–200
20
100
25
14
6
600
400
5
0.804
0.806
0.806
0.808
0.02
384
120
260
150
0.6
0.9
1.2
0.7
1.4
2.5
l 4.05
4.2
4.35
0.5
1.55 1.85 2.15
515
605
695
100
350
0.7
1
1
1.5
0.7
1
1
1.5
7.5
10
12.5
–7.5 –10 –12.5
1.5
3
0.3
0.6
0
2
UNITS
V
mA
μA
μA
μA
V
V
V
V
%/V
mV
mV
mV
mV
mV
mV
nA
dB
MHz
V
μA
V
V
μs
ns
ns
ns
A
Ω
A
Ω
%
%
%
V
μA
38145fb
3
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