TPS24720 Datasheet, PDF (4/37 Pages) Texas Instruments – 2.5-V to 18-V High-Efficiency Adjustable Power-Limiting Hot-Swap Controller With Current

TPS24720
SLVSAL1B – MARCH 2011 – REVISED MAY 2011
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ELECTRICAL CHARACTERISTICS (continued)
–40°C ≤ T_J ≤ 125°C, V_CC = 12 V, V_EN = 3 V, V_ENSD = 3 V, R_SET = 190 Ω, R_IMON = 5 kΩ, and R_PROG = 50 kΩ to GND.
All voltages referenced to GND, unless otherwise noted.
PARAMETER
CONDITIONS
MIN NOM MAX
Output low voltage
Sinking 2 mA
0.11 0.25
Input leakage current
Delay (deglitch) time
V_PGb = 0 V, 30 V
Rising or falling edge
–1
0
1
2 3.4
6
FFLTb
V_IMON threshold
Output low voltage
Measured V_IMON to GND
Sinking 2 mA
90 103 115
0.11 0.25
Input leakage current
FFLTb = 0 V, 30 V
–1
0
1
Delay
FFLTb falling
60 115 140
PROG
Bias voltage
Sourcing 10 µA
0.65 0.678 0.7
Input leakage current
TIMER
V_PROG = 1.5 V
–0.2
0 0.2
Sourcing current
Sinking current
Upper threshold voltage
V_TIMER = 0 V
V_TIMER = 2 V
V_EN = 0 V, V_TIMER = 2 V
8
10
12
8
10
12
2 4.5
7
1.3 1.35 1.4
Lower threshold voltage
0.33 0.35 0.37
Timer activation voltage
Bleed-down resistance
IMON
Raise GATE until I_TIMER sinking, measure V_{(GATE – VCC)}, V_VCC = 12 V
V_ENSD = 0 V, V_TIMER = 2 V
5 5.9
7
70 104 130
Summing threshold
Current limit in regulation
660 675 690
OUT
Input bias current
SET
V_OUT = 12 V
16
30
Input referred offset
Measure SET to SENSE
–1.5
0 1.5
GATE
Output voltage
Clamp voltage
Sourcing current
Sinking current
Pulldown resistance
Turn on delay
SENSE
V_OUT = 12 V
Inject 10 µA into GATE, measure V_{(GATE – VCC)}
V_GATE = 12 V
Fast turnoff, V_GATE = 14 V
Sustained, V_GATE = 4 V to 23 V
In inrush current limit, V_GATE = 4 V to 23 V
Thermal shutdown or V_ENSD = 0 V
V_VCC rising to GATE sourcing, t_prr50-50, See Figure 3
23.5 25.8
28
12 13.9 15.5
20
30
40
0.5
1 1.4
6
11
20
20
30
40
14
20
26
100 250
Input bias current
Current limit threshold
Power limit threshold
Fast-trip threshold
V_SENSE = 12 V, sinking current
V_OUT = 12 V
V_OUT = 7 V, R_PROG = 50 kΩ
V_OUT = 2 V, R_PROG = 25 kΩ
30
40
22.5
25 27.5
10 12.5
15
10 12.5
15
52
60
68
Fast-turnoff duration
8 13.5
18
Fast-turnoff delay
V_{(VCC – SENSE)} = 80 mV, C_GATE = 0 pF, t_{prf50–50}, See Figure 4
200
LATCH
Threshold, rising
0.3 0.9 1.4
Pullup current
V_LATCH = 0 V
7
10
13
UNIT
V
µA
ms
mV
V
µA
ms
V
µA
µA
µA
mA
V
V
V
kΩ
mV
µA
mV
V
V
µA
A
mA
µA
kΩ
µs
µA
mV
mV
mV
µs
ns
V
µA
4
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