LT1952IGN Linear Technology, LT1952IGN Datasheet - Page 3

• Manufacturer Part Number: LT1952IGN
• Description: IC,SMPS CONTROLLER,CURRENT-MODE,SOP,16PIN,PLASTIC
• Manufacturer: Linear Technology

ELECTRICAL CHARACTERISTICS
ERROR AMPLIFIER
FB Reference Voltage
FB Input Bias Current
Open Loop Voltage Gain
Unity Gain Bandwidth
COMP Source Current
COMP Sink Current
COMP Current (Disabled)
COMP High Level: V
COMP Active Threshold
COMP Low Level: V
CURRENT SENSE
I
I
I
OC Threshold
OC Input Current
Default Blanking Time
Adjustable Blanking Time
V
SOUT DRIVER
SOUT Clamp Voltage
SOUT Low Level
SOUT High Level
SOUT Active Pull-Off in Shutdown
SOUT to OUT (Rise) DELAY (t
V
OUT DRIVER
OUT Rise Time
OUT Fall Time
OUT Clamp Voltage
OUT Low Level
OUT High Level
OUT Active Pull-Off in Shutdown
temperature range, otherwise specifications are at T
V
specified.
PARAMETER
SENSE
SENSE
SENSE
BLANK
DELAY
REF
= 0.1µF, SD_V
Maximum Threshold
Input Current (Duty Cycle = 0%)
Input Current (Duty Cycle = 80%)
OL
OH
SEC
= 2V, BLANK = 40k, DELAY = 40k, I
DELAY
)
10V < V
FB = FB Reference Voltage
V
(Note 6)
FB = 1V, COMP = 1.6V
COMP = 1.6V
FB = V
FB = 1V, I
FB = 1V, SOUT Duty Cycle > 0 %
I
COMP = 2.5V, FB = 1V
COMP = 2.5V, FB = 1V (Note 4)
COMP = 2.5V, FB = 1V (Note 4)
(OC = 100mV)
COMP = 2.5V, FB = 1V (Note 10)
COMP = 2.5V, FB = 1V, R
I
I
I
FB = 1V
V
COMP = 2.5V, FB = 1V (Note 10)
R
FB = 1V, CL = 1nF (Notes 3, 6)
FB = 1V, CL = 1nF (Notes 3, 6)
I
I
I
I
FB = 1V
I
FB = 1V
V
CONDITIONS
(COMP)
(GATE)
(GATE)
(GATE)
(GATE)
(GATE)
(GATE)
(GATE)
(GATE)
OL
IN
IN
DELAY
A
= 25°C. COMP = open, FB = 1.4V, R
= 5V, SD_V
= 5V, SD_V
+ 0.2V < COMP < V
REF
= 0µA, COMP = 2.5V, FB = 1V
= 25mA
= –25mA, V
= 0µA, COMP = 2.5V, FB = 1V
= 20mA
= 200mA
= –20mA, V
= –200mA, V
= 120k
IN
= 250µA
SENSE
The
, COMP = 1.6V
(COMP)
< 25V, V
●
= 0V, OC = 0V, OUT = 1nF, V
SEC
SEC
denotes the specifications which apply over the full operating
= –250µA
OL
IN
IN
= 0V, SOUT = 1V
= 0V, OUT = 1V
IN
= 12V, COMP = 2.5V,
= 12V, COMP = 2.5V,
+ 0.2V < COMP < V
= 12V, COMP = 2.5V,
OH
BLANK
– 0.2
= 120k
OH
– 0.2
OSC
IN
= 178k, SYNC = 0V, SS_MAXDC = V
= 15V, SOUT = open, unless otherwise
●
●
1.201
10.5
11.5
9.75
MIN
197
2.7
0.7
9.9
65
–4
18
98
10
20
4
1
1.226
0.15
0.45
1.25
TYP
–75
220
–35
107
–50
180
540
120
3.2
1.0
0.5
0.9
–9
40
50
30
85
10
23
–8
12
13
3
1
LT1952
1.250
–200
–100
MAX
13.5
0.75
14.5
0.75
243
116
0.4
1.8
28
UNITS
REF
3
MHz
1952f
mA
mA
mV
mV
mA
mA
,
nA
dB
µA
µA
µA
nA
ns
ns
ns
ns
ns
ns
V
V
V
V
V
V
V
V
V
V
V
V
V
V