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参数资料
| 型号： | LTC4253AIGN#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/34页 |
| 文件大小： | 383K |
| 描述： | IC HOT SWAP CONTRLR -48V 16-SSOP |
| 标准包装： | 2,500 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | 8.2 V ~ 14.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SSOP |
| 包装： | 带卷 (TR) |
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LTC4253/LTC4253A
3
425353aff
For more information www.linear.com/4253
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
LTC4253
LTC4253A
UNITS
MIN TYP MAX MIN TYP MAX
V
Z
V
IN
V
EE
Zener Voltage
I
IN
= 2mA
?SPAN class="pst LTC4253ACGN-TRPBF_2330559_3"> 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
1.1
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
?SPAN class="pst LTC4253ACGN-TRPBF_2330559_3"> 0.5
1
1.5 0.25 0.5 0.75
V
V
IH
TTL Input High Voltage
?/DIV>
2
2
V
V
IL
TTL Input Low Voltage
?/DIV>
0.8
0.8
V
V
HYST
TTL Input Buffer Hysteresis
600
600
mV
I
RESET
RESET Input Current
V
EE
d V
RESET
d V
IN
?/DIV>
?.1 ?0
?.1 ?0
礎
I
EN
EN2, EN3 Input Current
V
EN
= 4V V
EN
= 0V
?
?/DIV>
60
120
?.1
180
?0
60
120
?.1
180
?0
礎
礎
V
CB
Circuit Breaker Current Limit Voltage
V
CB
= (V
SENSE
V
EE
)
?SPAN class="pst LTC4253ACGN-TRPBF_2330559_3"> 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 LTC4253ACGN-TRPBF_2330559_3"> 80
100 120
mV
V
ACL
V
CB
Analog Current Limit Voltage
Circuit Breaker Current Limit 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 LTC4253ACGN-TRPBF_2330559_3"> 150 200 300 150 200 300
mV
V
SS
SS Voltage
After End of SS Timing Cycle
?/DIV>
2
2.2
2.4 1.25 1.4 1.55
V
I
SS
SS Pin Current
UV = OV = 4V , V
SENSE
= V
EE,
V
SS
= 0V (Sourcing)
?SPAN class="pst LTC4253ACGN-TRPBF_2330559_3"> 12
22
32
16
28
40
礎
UV = OV = 0V , V
SENSE
= V
EE,
V
SS
= 1V (Sinking)
28
28
mA
R
SS
SS Output Impedance
100
50
k?/DIV>
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 LTC4253ACGN-TRPBF_2330559_3"> 30
50
70
30
50
70
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
?SPAN class="pst LTC4253ACGN-TRPBF_2330559_3"> 10
12
V
Z
10
12
V
Z
V
V
GATEL
Gate Low Threshold
Before Gate Ramp Up
0.5
0.5
V
V
GATEH
Gate High Threshold
V
GATEH
= V
IN
V
GATE
, for PWRGD1,
PWRGD2, PWRGD3 Status
2.8
2.8
V
V
UVHI
UV Pin Threshold HIGH
UV Low to High
?SPAN class="pst LTC4253ACGN-TRPBF_2330559_3"> 3.075 3.225 3.375
V
V
UVLO
UV Pin Threshold LOW
UV High to Low
?SPAN class="pst LTC4253ACGN-TRPBF_2330559_3"> 2.775 2.925 3.075
V
V
UV
UV Pin Threshold
UV Low to High
?/DIV>
3.05 3.08 3.11
V
V
UVHST
UV Pin Hysteresis
?/DIV>
230 300 350
292
324
356
mV
mV
V
OVHI
OV Pin Threshold HIGH
OV Low to High
?SPAN class="pst LTC4253ACGN-TRPBF_2330559_3"> 5.85 6.15 6.45
V
V
OVLO
OV Pin Threshold LOW
OV High to Low
?SPAN class="pst LTC4253ACGN-TRPBF_2330559_3"> 5.55 5.85 6.15
V
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