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| 型号： | LTC1421CSW-2.5#TR |
| 厂商： | Linear Technology |
| 文件页数： | 3/24页 |
| 文件大小： | 329K |
| 描述： | IC CONTROLLER HOTSWP 2.5V 24SOIC |
| 标准包装： | 1,000 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | 3 V ~ 12 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC |
| 包装： | 带卷 (TR) |
3
LTC1421/LTC1421-2.5
Note 3: After power-on reset, the V
OUTLO
and V
OUTHI
have to drop below the
V
TRIP
point before the charge pump is restarted.
Note 4: After power-on reset, the V
OUTLO
has to drop below the V
TRIP
point
before the charge pump is restarted.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are reference to ground unless otherwise
specified.
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25?/SPAN>C. V
CCHI
= 12V, V
CCLO
= 5V unless otherwise noted (Note 2).
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I
RAMP
RAMP Pin Output Current
Charge Pump On, V
RAMP
= 0.4V
q
11
17
23
礎
I
CP
Charge Pump Output Current
Charge Pump On, GATEHI = 0V
600
礎
GATELO = 0V
300
礎
V
GATEHI
GATEHI N-Channel Gate Drive
V
GATEHI
V
OUTHI
6
16
V
V
GATELO
GATELO N-Channel Gate Drive
V
GATELO
V
OUTLO
10
16
V
V
AUXVCC
Auxiliary V
CC
Output Voltage
V
CCLO
= 5V, Unloaded
4.5
V
V
IL
Input Low Voltage
CON1, CON2, POR
q
0.8
V
V
IH
Input High Voltage
CON1, CON2, POR
q
2
V
I
IN
Input Current
CON1, CON2, POR = GND
q
30
60
90
礎
V
OL
Output Low Voltage
RESET, COMPOUT, PWRGD, DISABLE, FAULT,
q
0.4
V
I
O
= 3mA
CPON, I
O
= 3mA
q
1.45
V
V
OH
Output High Voltage
DISABLE, I
O
= 3mA
q
4
V
CPON, I
O
= 1mA
q
3.4
V
I
PU
Logic Output Pull-Up Current
RESET, PWRGD, FAULT = GND
15
礎
AC CHARACTERISTICS
t
1
CON1 or CON2?to CPON?/DIV>
Figure 1, C
L
= 15pF
q
15
20
30
ms
t
2
PWRGD?to RESET?/DIV>
Figure 1, R
L
= 10k to V
CCLO
, C
L
= 15pF
160
200
240
ms
q
140
200
280
ms
t
3
PWRGD?to DISABLE?/DIV>
Figure 1, C
L
= 15pF
160
200
240
ms
q
140
200
280
ms
t
4
POR?to CPON?/DIV>
Figure 1, C
L
= 15pF
q
15
20
30
ms
t
5
PWRGD?to RESET?/DIV>
Figure 1, R
L
= 10k to V
CCLO
, C
L
= 15pF
32
祍
t
6
POR?to CPON?/DIV>
Figure 1, C
L
= 15pF
50
ns
t
7
CON1 or CON2?to CPON?/DIV>
Figure 1, C
L
= 15pF
50
ns
t
9
Short-Circuit Detect to FAULT?/DIV>
Figure 1, R
L
= 10k to V
CCLO
, C
L
= 15pF
20
祍
V
CCLO
SETLO = 0mV to 100mV
t
10
Short-Circuit Detect to CPON?/DIV>
Figure 2, C
L
= 15pF
20
祍
V
CCLO
SETLO = 0mV to 100mV
t
11
POR?to FAULT?/DIV>
Figure 2, R
L
= 10k to V
CCLO
, C
L
= 15pF
20
ns
t
CHL
Comparator High to Low
COMP
= 1.232V, 10mV Overdrive
q
0.25
0.5
祍
R
L
= 10k to V
CCLO
, C
L
= 15pF
t
CLH
Comparator Low to High
COMP
= 1.232V, 10mV Overdrive
q
1
1.5
祍
R
L
= 10k to V
CCLO
, C
L
= 15pF
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