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LM25061 bảng dữ liệu(PDF) 4 Page - Texas Instruments

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LM25061
SNVS611E – FEBRUARY 2011 – REVISED MARCH 2013
www.ti.com
Electrical Characteristics (continued)
Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C
to +85°C. Minimum and Maximum limits are ensured through test, design, or statistical correlation. Typical values represent
the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated the
following conditions apply: VIN = 12V.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
Gate Control (GATE pin)
IGATE
Source current
Normal Operation
-27
-20
-13
µA
Sink current
UVLO = 1V
1.5
2
2.7
mA
VIN - SENSE = 150 mV or VIN <
160
260
375
mA
POR, VGATE = 5V
VGATE
Gate output voltage in normal operation
GATE voltage with respect to ground
18
19.5
21
V
Current Limit
VCL
Threshold voltage
VIN-SENSE voltage
45
50
55
mV
tCL
Response time
VIN-SENSE stepped from 0 mV to
15
µs
80 mV
ISENSE
SENSE input current
Enabled, SENSE = OUT
23
µA
Disabled, OUT = 0V
12
Enabled, OUT = 0V
62
Circuit Breaker
VCB
Threshold voltage
VIN - SENSE
75
95
110
mV
tCB
Response time
VIN - SENSE stepped from 0 mV to
0.19
0.36
µs
150 mV, time to GATE low, no load
Timer (TIMER pin)
VTMRH
Upper threshold
1.60
1.72
1.85
V
VTMRL
Lower threshold
Restart cycles (LM25061-2)
0.9
1.0
1.1
V
End of 8th cycle (LM25061-2)
0.3
V
Re-enable Threshold (LM25061-1)
0.3
V
ITIMER
Insertion time current
-7.5
-5.5
-3.5
µA
Sink current, end of insertion time
TIMER pin = 2V
1.5
2
2.5
mA
Fault detection current
-110
-80
-50
µA
Fault sink current
1.6
2.5
3.4
µA
DCFAULT
Fault Restart Duty Cycle
LM25061-2 only
0.67
%
tFAULT
Fault to GATE low delay
TIMER pin reaches the upper
20
µs
threshold
FB Pin
FBTH
FB threshold
UVLO = 2V
1.145
1.17
1.195
V
FBHYS
FB hysteresis current
FB = 2V
-28
-22
-17
µA
FBDEL
FB delay
Delay to PGD high
100
ns
Delay to PGD low
110
FBBIAS
FB bias current
FB = 1V
1
µA
Power Good (PGD pin)
PGDVOL
Output low voltage
ISINK = 2 mA
15
30
mV
PGDIOH
Off leakage current
VPGD = 17V
1
µA
4
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