參數(shù)資料
型號(hào)： US3855BQTR
英文描述： Analog IC
中文描述： 模擬IC
文件頁(yè)數(shù)： 3/13頁(yè)
文件大?。?/td> 265K
代理商： US3855BQTR
SLUS212E NOVEMBER 1999 REVISED FEBRUARY 2004
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics unless otherwise stated, these parameters apply for T
A
= 40
°
C to 100
°
C
for the UC285-x series and 0
°
C to 100
°
C for the UC385-x, VB = 5 V; VIN = 3.3 V, VOUT = 2.5 V, T
A
= T
J
.
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
UC3852 Fixed 2.1 V, 5-A Family (continued)
VIN dropout voltage (VIN - VOUT)
IVOUT = 5 A,
IVOUT = 5 A
IVOUT = 5 A
IVOUT = 5 A
IVOUT = 5 A
TJ = 25
°
C
350
425
mV
UC385-2
350
490
mV
UC285-2
350
500
mV
VB dropout (VB - VOUT)
UC385-2
1.8
2.1
V
UC285-2
1.8
2.2
V
Short circuit current limit
5.1
7.5
A
VB current
IVOUT = 10 mA
IVOUT = 5 A
IVOUT = 5 A
8
15
mA
40
100
mA
VIN current
4.9
4.96
A
UC3851 Fixed 1.5 V, 5-A Family
Output voltage
UC385-1
IVOUT = 100 mA
IVOUT = 100 mA
IVOUT = 10 mA to 5 A
1.485
1.5
1.515
V
UC285-1
1.470
1.5
1.515
V
Load regulation
0.5
4
mV
VIN PSRR
80
110
dB
VB PSRR
VIN dropout voltage (VIN - VOUT)
50
65
dB
IVOUT = 5 A,
IVOUT 5 A
IVOUT = 5 A
IVOUT = 5 A
IVOUT = 5 A
TJ = 25
°
C
350
425
mV
UC285-1
350
490
mV
UC285-2
350
500
mV
VB dropout (VB - VOUT)
UC385-1
1.8
2.1
V
UC285-1
1.8
2.2
V
Short circuit current limit
VB current
5.1
7.5
A
IVOUT = 10 mA
IVOUT = 5 A
IVOUT = 5 A
8
15
mA
40
100
mA
VIN = current
4.9
4.96
A
UC385-ADJ Adjustable, 5-A Family
ADJ voltage
UC385-ADJ
IVOUT - 100 mA
IVOUT - 100 mA
IVOUT = 10 mA to 5 A
VOUT programmed for 2.5 V
1.188
1.2
1.212
V
UC285-ADJ
1.176
1.2
1.212
V
Load regulation
0.5
4
mV
VIN PSRR
80
110
dB
VB PSRR VOUT
Programmed for 2.5 V
50
65
dB
VIN dropout voltage (VIN - VOUT)
IVOUT = 5 A,
IVOUT = 5 A
IVOUT = 5 A
IVOUT = 5 A
IVOUT = 5 A
TJ = 25
°
C
350
425
mV
UC385-ADJ
350
490
mV
UC285-ADJ
350
500
mV
VB dropout (VB - VOUT)
UC385-ADJ
1.8
2.1
V
UC285-ADJ
1.8
2.2
V
Short circuit current limit
VB current
5.1
7.5
A
IVOUT = 10 mA
IVOUT = 5 A
IVOUT = 5 A
8
15
mA
40
100
mA
VIN current
4.9
4.96
A
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