參數(shù)資料
型號(hào)： LT1952IGN
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： Single Switch Synchronous Forward Controller
中文描述： 1 A SWITCHING CONTROLLER, 560 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 0.150 INCH, PLASTIC, SSOP-16
文件頁(yè)數(shù)： 3/24頁(yè)
文件大小： 252K
代理商： LT1952IGN
LT1952
3
1952f
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
A
= 25
°
C. COMP = open, FB = 1.4V, R
OSC
= 178k, SYNC = 0V, SS_MAXDC = V
REF
,
V
REF
= 0.1
μ
F, SD_V
SEC
= 2V, BLANK = 40k, DELAY = 40k, I
SENSE
= 0V, OC = 0V, OUT = 1nF, V
IN
= 15V, SOUT = open, unless otherwise
specified.
The
●
denotes the specifications which apply over the full operating
PARAMETER
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
OH
COMP Active Threshold
COMP Low Level: V
OL
CURRENT SENSE
I
SENSE
Maximum Threshold
I
SENSE
Input Current (Duty Cycle = 0%)
I
SENSE
Input Current (Duty Cycle = 80%)
OC Threshold
OC Input Current
Default Blanking Time
Adjustable Blanking Time
V
BLANK
SOUT DRIVER
SOUT Clamp Voltage
SOUT Low Level
SOUT High Level
CONDITIONS
MIN
TYP
MAX
UNITS
10V < V
IN
< 25V, V
OL
+ 0.2V < COMP < V
OH
– 0.2
FB = FB Reference Voltage
V
OL
+ 0.2V < COMP < V
OH
– 0.2
(Note 6)
FB = 1V, COMP = 1.6V
COMP = 1.6V
FB = V
REF
, COMP = 1.6V
FB = 1V, I
(COMP)
= –250
μ
A
FB = 1V, SOUT Duty Cycle > 0 %
I
(COMP)
= 250
μ
A
●
1.201
1.226
–75
85
3
–9
10
23
3.2
1.0
0.15
1.250
–200
V
nA
dB
65
MHz
mA
mA
μ
A
–4
4
18
2.7
0.7
28
V
V
V
0.4
COMP = 2.5V, FB = 1V
COMP = 2.5V, FB = 1V (Note 4)
COMP = 2.5V, FB = 1V (Note 4)
197
220
–8
–35
107
–50
180
540
1
243
mV
μ
A
μ
A
mV
nA
ns
ns
●
98
116
–100
(OC = 100mV)
COMP = 2.5V, FB = 1V (Note 10)
COMP = 2.5V, FB = 1V, R
BLANK
= 120k
V
I
(GATE)
= 0
μ
A, COMP = 2.5V, FB = 1V
I
(GATE)
= 25mA
I
(GATE)
= –25mA, V
IN
= 12V, COMP = 2.5V,
FB = 1V
V
IN
= 5V, SD_V
SEC
= 0V, SOUT = 1V
COMP = 2.5V, FB = 1V (Note 10)
R
DELAY
= 120k
10.5
12
0.5
13.5
0.75
V
V
V
10
SOUT Active Pull-Off in Shutdown
SOUT to OUT (Rise) DELAY (t
DELAY
)
1
mA
ns
ns
40
120
0.9
V
DELAY
OUT DRIVER
OUT Rise Time
OUT Fall Time
OUT Clamp Voltage
OUT Low Level
V
FB = 1V, CL = 1nF (Notes 3, 6)
FB = 1V, CL = 1nF (Notes 3, 6)
I
(GATE)
= 0
μ
A, COMP = 2.5V, FB = 1V
I
(GATE)
= 20mA
I
(GATE)
= 200mA
I
(GATE)
= –20mA, V
IN
= 12V, COMP = 2.5V,
FB = 1V
I
(GATE)
= –200mA, V
IN
= 12V, COMP = 2.5V,
FB = 1V
V
IN
= 5V, SD_V
SEC
= 0V, OUT = 1V
50
30
13
0.45
1.25
ns
ns
V
V
V
V
11.5
14.5
0.75
1.8
OUT High Level
9.9
9.75
V
OUT Active Pull-Off in Shutdown
20
mA
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