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參數(shù)資料
型號(hào): TPS2421-2DDAR
廠商: TEXAS INSTRUMENTS INC
元件分類: 電源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
封裝: PLATSIC, SOP-8
文件頁(yè)數(shù): 18/24頁(yè)
文件大小: 1297K
代理商: TPS2421-2DDAR
www.ti.com
SLUS907D – JANUARY 2009 – REVISED AUGUST 2010
ELECTRICAL CHARACTERISTICS
Unless otherwise noted: 3 V
≤ VIN ≤ 18 V, EN = 0 V, PG = FLT = open, ROUT = open, CLOAD = 0, RSET = 49.9 k, –40°C ≤ TJ
125°C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIN
UVLO
VIN rising
2.6
2.85
2.9
V
Hysteresis
150
mV
Bias current
EN = 2.4V
25
100
mA
EN = 0V
3.9
5
mA
VIN, VOUT
RVIN-VOUT, IVOUT < IRMAX or
RON
33
50
m
IVOUT < (ISET × 1.25), 1 A ≤ IVOUT ≤ 4.5 A
Power limit TPS242x
VIN: 12 V, COUT = 1000 mF EN: 3 V → 0 V
3
5
7.5
V
Reverse diode
VOUT > VIN , EN = 5 V, IIN = –1 A
0.77
1.0
voltage
ISET
IVOUT ↑, ICT: sinking → sourcing, pulsed test
RRSET = 200 k
0.80
1.2
0°C
≤ TJ ≤ 85°C
RRSET = 100 k
1.80
2.2
Fault current
ISET
RRSET = 49.9 k
3.60
4.40
A
threshold
RRSET = 200 k
0.75
1.25
-40°C
≤ TJ ≤ 125°C
RRSET = 100 k
1.75
2.25
RRSET = 49.9 k
3.60
4.40
RRSET = 200 k
1.1
1.8
2.6
ILIM /
Ratio ILIM / IFLT
RRSET = 100 k
1.1
1.5
2.1
IFLT
RRSET = 49.9 k
1.1
1.4
1.6
RRSET = 200 k
1.1
1.8
2.4
ILIM
Current limit
IVOUT rising, VVIN-VOUT = 0.3 V, pulsed test
RRSET = 100 k
2.3
3.0
3.7
RRSET = 49.9 k
4.6
5.5
6.3
CT
ICT sourcing, VCT = 1 V, In current limit
29
35
41
Charge/discharge
mA
current
ICT sinking, VCT = 1 V, drive CT to 1 V, measure current
1.0
1.4
1.8
VCT rising
1.3
1.4
1.5
Threshold voltage
V
VCT falling, drive CT to 1 V, measure current
0.1
0.16
0.3
ON/OFF fault duty
VVOUT = 0 V
2.8%
3.7%
4.6%
cycle
Copyright 2009–2010, Texas Instruments Incorporated
3
Product Folder Link(s): TPS2421-1 TPS2421-2
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