ltc1871ems-trpbf Linear Technology Corporation, ltc1871ems-trpbf Datasheet - Page 3

• Manufacturer Part Number: ltc1871ems-trpbf
• Description: Wide Input Range, No Rsense Current Mode Boost, Flyback And Sepic Controller
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
otherwise specifi ed.
SYMBOL
Main Control Loop
V
I
V
V
V
I
V
I
ΔV
ΔV
ΔV
ΔV
g
V
V
I
I
Oscillator
f
Q
RUN
FB
ΔV
SENSE(ON)
SENSE(OFF)
OSC
m
IN(MIN)
RUN
RUN
RUN(HYST)
FB
ITH(BURST)
SENSE(MAX)
FB
IN
ITH
FB(OV)
FB
+
–
PARAMETER
Minimum Input Voltage
Input Voltage Supply Current
Continuous Mode
Burst Mode Operation, No Load
Shutdown Mode
Rising RUN Input Threshold Voltage
Falling RUN Input Threshold Voltage
RUN Pin Input Threshold Hysteresis
RUN Input Current
Feedback Voltage
FB Pin Input Current
Line Regulation
Load Regulation
ΔFB Pin, Overvoltage Lockout
Error Amplifi er Transconductance
Burst Mode Operation I
Maximum Current Sense Input Threshold
SENSE Pin Current (GATE High)
SENSE Pin Current (GATE Low)
Oscillator Frequency
Oscillator Frequency Range
TH
Pin Voltage
CONDITIONS
I-Grade or H-Grade (Note 2)
(Note 4)
V
V
I-Grade or H-Grade (Note 2)
V
V
I-Grade or H-Grade (Note 2)
V
V
H-Grade (Note 2)
I-Grade (Note 2)
H-Grade (Note 2)
V
V
V
2.5V ≤ V
2.5V ≤ V
V
V
I-Grade or H-Grade (Note 2)
V
I
Falling I
Duty Cycle < 20%
Duty Cycle < 20%, I-Grade or H-Grade (Note 2)
V
V
R
R
R
I-Grade or H-Grade (Note 2)
A
TH
MODE/SYNC
MODE/SYNC
MODE/SYNC
MODE/SYNC
RUN
RUN
ITH
ITH
ITH
MODE/SYNC
MODE/SYNC
FB(OV)
SENSE
SENSE
FREQ
FREQ
FREQ
= 25°C. V
Pin Load = ±5μA (Note 5)
= 0.2V (Note 5)
= 0.2V (Note 5), I-Grade or H-Grade (Note 2)
= 0.2V (Note 5)
= 0V
= 0V, I-Grade or H-Grade (Note 2)
= 80k
= 80k, I-Grade (Note 2)
= 80k, H-Grade (Note 2)
= 0V
= 30V
– V
TH
The
IN
IN
Voltage (Note 5)
≤ 30V
≤ 30V, I-Grade or H-Grade (Note 2)
FB(NOM)
= 5V, V
= 5V, V
= 0V, V
= 0V, V
= 0V, V
= 0V, V
l
IN
denotes the specifi cations which apply over the full operating
= V
FB
FB
ITH
ITH
ITH
ITH
in Percent
INTVCC
= 1.4V, V
= 1.4V, V
= 0.2V (Note 5)
= 0.2V (Note 5),
= 0.5V to 0.9V (Note 5)
= 0.5V to 0.9V (Note 5)
= 5V, V
ITH
ITH
= 0.75V
= 0.75V,
RUN
= 1.5V, R
FREQ
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
= 80k, V
1.223
1.198
1.179
1.218
1.212
1.205
MIN
120
100
250
250
240
2.5
2.5
2.5
– 1
– 1
50
35
35
50
50
MODE/SYNC
1.348
1.248
1.230
0.002
0.002
–0.1
–0.1
TYP
550
550
250
250
100
100
650
150
300
300
300
0.3
0.1
10
10
18
35
LTC1871
1
6
= 0V, unless
1.273
1.298
1.315
1.242
1.248
1.255
1000
1000
1000
1000
MAX
0.02
0.02
500
500
150
175
300
180
200
350
350
360
20
20
60
60
10
50
5
UNITS
μmho
1871fe
3
%/V
%/V
kHz
kHz
kHz
kHz
kHz
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
nA
nA
μA
μA
%
%
%
V
V
V
V
V
V
V
V
V
V