LTC4361-1 Datasheet, PDF (4/16 Pages) Linear Technology – Overvoltage/Overcurrent Protection Controller

LTC4361-1/LTC4361-2
TYPICAL PERFORMANCE CHARACTERISTICS
T_A = 25°C, V_IN = 5V, V_ON = 0V, unless otherwise noted.
Input Supply Current
vs Input Voltage
10000
GATE Drive vs GATE Current
8
1000
100
V_ON = 0V
10
1
V_ON = 2.5V
7
6
V_IN = 5V
5
V_IN = 3V
4
3
V_IN = 2.5V
2
1
0.1
1
10
V_IN (V)
100
436112 G01
0
0
2
4
6
8 10 12
I_GATE (μA)
436112 G02
PWRGD Voltage
vs PWRGD Current
500
400
GATE Off Propagation Delay
vs Overdrive
8
V_IN = STEP 5V TO (V_IN(OV) + V_OVDRV)
7
6
300
5
4
200
3
2
100
1
0
0
1
2
3
4
5
I_PWRGD (mA)
436112 G04
0
0
0.5
1
1.5
2
2.5
V_OVDRV (V)
436012 G05
GATE Fast Pull-Down Current
vs Temperature
40
V_IN = 6V
V_GATE = 9V
35
30
25
20
–50 –25 0
25 50 75 100
TEMPERATURE (°C)
436112 G03
GATE Voltage and GATE High
Threshold (for PWRGD Status)
vs Input Voltage
12
V_IN = V_OUT
11
10
V_GATE
9
8
V_GATE(TH)
7
6
5
4
2.5 3 3.5 4 4.5 5 5.5 6
V_IN (V)
436112 G06
Normal Start-Up Sequence
GATE Slow Ramp-Up
V_IN
5V/DIV
V_OUT
5V/DIV
V_GATE
10V/DIV
I_CABLE
0.5A/DIV
20ms/DIV
FIGURE 5 CIRCUIT
R_IN = 150mΩ, L_IN = 0.7μH
R_SENSE = 25mΩ
LOAD = 10Ω, C_OUT = 10μF
4
V_IN
5V/DIV
V_OUT
5V/DIV
V_GATE
10V/DIV
I_CABLE
0.5A/DIV
436112 G07
1ms/DIV
FIGURE 5 CIRCUIT
R_IN = 150mΩ, L_IN = 0.7μH
R_SENSE = 25mΩ
LOAD = 10Ω, C_OUT = 10μF
Entering Sleep Mode
V_ON
5V/DIV
V_OUT
5V/DIV
V_GATE
10V/DIV
I_CABLE
0.5A/DIV
436112 G08
50μs/DIV
FIGURE 5 CIRCUIT
R_IN = 150mΩ, L_IN = 0.7μH
R_SENSE = 25mΩ
LOAD = 10Ω, C_OUT = 10μF
436112 G09
436112f