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参数资料
| 型号： | TPS2458RHBR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32 |
| 封装： | PLASTIC, QFP-32 |
| 文件页数： | 22/28页 |
| 文件大小： | 966K |
| 代理商： | TPS2458RHBR |
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ELECTRICAL CHARACTERISTICS
www.ti.com ............................................................................................................................................................................................ SLUS916 – FEBRUARY 2009
over operating free-air temperature range (unless otherwise noted)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ENABLE INPUTS
Threshold voltage, falling edge
1.2
1.3
1.4
V
Hysteresis
20
50
80
mV
Pullup current
VEN =VOREN = 0 V
5
8
15
Input bias current
VEN12 = VOREN = 17 V
6
15
mA
Input bias current
VEN3 = 5 V
1
5
3.3 V Turn off time
EN3 deasserts to VVOUT3 < 1.0 V, COUT = 0 F
10
mS
12 V Turn off time
EN12 deasserts to VVOUT12 < 1.0 V, COUT = 0 F, CQGATE
20
= 35 nF
POWER GOOD OUTPUTS
Low voltage
Sinking 2 mA
0.14
0.25
V
Leakage current
VPG = 17 V
1
mA
Threshold voltage
PG12, falling VOUT12
10.2
10.5
10.8
V
PG3, falling VOUT3
2.7
2.8
2.9
Hysteresis
PG12, measured at OUT12
130
mV
PG3, measured at OUT3
50
Deglitch time
PG3 falling
50
100
150
ms
FAULT OUTPUTS
Low voltage
Sinking 2 mA
0.14
0.25
V
Leakage current
FLTx = 17 V
1
A
VINT
Output voltage
0 V < IVINT < 50 mA
2
2.3
2.8
V
FAULT TIMER
Sourcing current
VVCTx = 0 V, during fault
–7
–10
–13
mA
Sinking current
VVCTx = 2 V
7
10
13
Upper threshold voltage
1.3
1.35
1.4
V
Lower threshold voltage
0.33
0.35
0.37
12-V SUMMING NODE
Input referred offset
10.8 V
≤ VSENM ≤ 13.2 V, VSENP = (VSENM + 50 mV),
–1.5
1.5
mV
measure VSET–VSENM
Summing threshold
VPASS = 15 V
0.66
0.675
0.69
V
Leakage current
VSET =(VSENM – 10 mV)
1
mA
12-V CURRENT LIMIT
Current limit threshold
RSUM = 6.8 k, RSET = 422 , increase ILOAD and
47.5
50
52.5
mV
measure VSENP – VSENM when VPASS = 15 V
Sink current in current limit
IPASS measured at VSUM = 1 V and VPASS = 12 V
20
40
mA
Fast trip threshold
Measure VSENP – VSENM
80
100
120
mV
Fast turn-off delay
20 mV overdrive, CPASS = 0 pF, tp50-50
200
300
ns
Timer start threshold
VPASS - VIN when timer starts, while VPASS falling due to
5
6
7
V
overcurrent
Copyright 2009, Texas Instruments Incorporated
3
Product Folder Link(s): TPS2458
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