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参数资料
| 型号： | LTC4252A-2IMS#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/36页 |
| 文件大小： | 328K |
| 描述： | IC CNTRLR HOTSWAP NEGVOLT 10MSOP |
| 标准包装： | 50 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 管件 |
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LTC4252-1/LTC4252-2
LTC4252A-1/LTC4252A-2
3
425212fe
For more information www.linear.com/LTC4252-1
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25癈. (Note 2)
SYMBOL PARAMETER
CONDITIONS
LTC4252-1/-2
LTC4252A-1/-2
UNITS
MIN
TYP MAX MIN
TYP MAX
V
Z
V
IN
V
EE
Zener Voltage
I
IN
= 2mA
l 11.5
13
14.5 11.5
13
14.5
V
r
Z
V
IN
V
EE
Zener Dynamic Impedance
I
IN
= 2mA to 30mA
5
5
?/DIV>
I
IN
V
IN
Supply Current
UV = OV = 4V , V
IN
= (V
Z
0.3V)
?/DIV>
0.8
2
0.9
2
mA
V
LKO
V
IN
Undervoltage Lockout
Coming Out of UVLO (Rising V
IN
)
?/DIV>
9.2
11.5
9
10
V
V
LKH
V
IN
Undervoltage Lockout Hysteresis
1
0.5
V
V
CB
Circuit Breaker Current Limit Voltage
V
CB
= (V
SENSE
V
EE
)
?/DIV>
40
50
60
45
50
55
mV
V
ACL
Analog Current Limit Voltage
V
ACL
= (V
SENSE
V
EE
),
SS = Open or 2.2V
?SPAN class="pst LTC4252A-1IMS-TRPBF_2350112_3"> 80
100
120
mV
V
ACL
/
V
CB
Analog Current Limit Voltage/
Circuit Breaker Voltage
V
ACL
= (V
SENSE
V
EE
),
SS = Open or 1.4V
?/DIV>
1.05 1.20 1.38
V/V
V
FCL
Fast Current Limit Voltage
V
FCL
= (V
SENSE
V
EE
)
?SPAN class="pst LTC4252A-1IMS-TRPBF_2350112_3"> 150
200
300
150
200
300
mV
V
SS
SS Voltage
After End of SS Timing Cycle
2.2
1.4
V
R
SS
SS Output Impedance
100
50
k?/DIV>
I
SS
SS Pin Current
UV = OV = 4V , V
SENSE
= V
EE
,
V
SS
= 0V (Sourcing)
22
28
礎
UV = OV = 0V , V
SENSE
= V
EE
,
V
SS
= 2V (Sinking)
28
28
mA
V
OS
Analog Current Limit Offset Voltage
10
10
mV
V
ACL
+V
OS
/
V
SS
Ratio (V
ACL
+ V
OS
) to SS Voltage
0.05
0.05
V/V
I
GATE
GATE Pin Output Current
UV = OV = 4V , V
SENSE
= V
EE
,
V
GATE
= 0V (Sourcing)
?SPAN class="pst LTC4252A-1IMS-TRPBF_2350112_3"> 40
58
80
40
58
80
礎
UV = OV = 4V , V
SENSE
V
EE
= 0.15V ,
V
GATE
= 3V (Sinking)
17
17
mA
UV = OV = 4V , V
SENSE
V
EE
= 0.3V ,
V
GATE
= 1V (Sinking)
190
190
mA
V
GATE
External MOSFET Gate Drive
V
GATE
V
EE
, I
IN
= 2mA
?/DIV>
10
12
V
Z
10
12
V
Z
V
V
GATEH
Gate High Threshold
V
GATEH
= V
IN
V
GATE
, I
IN
= 2mA,
for PWRGD Status (MS Only)
2.8
2.8
V
V
GATEL
Gate Low Threshold
(Before Gate Ramp-Up)
0.5
0.5
V
V
UVHI
UV Pin Threshold HIGH
?SPAN class="pst LTC4252A-1IMS-TRPBF_2350112_3"> 3.075 3.225 3.375
V
V
UVLO
UV Pin Threshold LOW
?/DIV>
2.775 2.925 3.075
V
V
UV
UV Pin Threshold
Low-to-High Transition
?/DIV>
3.05 3.08 3.11
V
V
UVHST
UV Pin Hysteresis
(?/SPAN> for LTC4252A Only)
?/DIV>
300
292
324
356
mV
V
OVHI
OV Pin Threshold HIGH
?SPAN class="pst LTC4252A-1IMS-TRPBF_2350112_3"> 5.85 6.15 6.45
V
V
OVLO
OV Pin Threshold LOW
?SPAN class="pst LTC4252A-1IMS-TRPBF_2350112_3"> 5.25 5.55 5.85
V
V
OV
OV Pin Threshold
Low-to-High Transition
?/DIV>
5.04 5.09 5.14
V
V
OVHST
OV Pin Hysteresis
(?/SPAN> for LTC4252A Only)
?/DIV>
600
82
102
122
mV
I
SENSE
SENSE Pin Input Current
UV = OV = 4V , V
SENSE
= 50mV
?/DIV>
15
30
15
30
礎
I
INP
UV , OV Pin Input Current
UV = OV = 4V
?/DIV>
?.1
?
?.1
?
礎
V
TMRH
TIMER Pin Voltage High Threshold
4
4
V
V
TMRL
TIMER Pin Voltage Low Threshold
1
1
V
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