參數(shù)資料
型號(hào): LTC1474CS8-3.3#TR
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 0.75 A SWITCHING REGULATOR, PDSO8
封裝: 0.150 INCH, PLASTIC, SO-8
文件頁(yè)數(shù): 14/20頁(yè)
文件大?。?/td> 237K
代理商: LTC1474CS8-3.3#TR
3
LTC1474/LTC1475
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VFB
Feedback Voltage
ILOAD = 50mA
q
1.205
1.230
1.255
V
LTC1474/LTC1475
VOUT
Regulated Output Voltage
ILOAD = 50mA
LTC1474-3.3/LTC1475-3.3
q
3.234
3.300
3.366
V
LTC1474-5/LTC1475-5
q
4.900
5.000
5.100
V
IFB
Feedback Current
q
030
nA
LTC1474/LTC1475 Only
ISUPPLY
No Load Supply Current (Note 3)
ILOAD = 0 (Figure 1 Circuit)
10
A
VOUT
Output Voltage Line Regulation
VIN = 7V to 12V, ILOAD = 50mA
5
20
mV
Output Voltage Load Regulation
ILOAD = 0mA to 50mA
2
15
mV
Output Ripple
ILOAD = 10mA
50
mVP-P
IQ
Input DC Supply Current (Note 2)
(Exclusive of Driver Gate Charge Current)
Active Mode (Switch On)
VIN = 3V to 18V
100
175
A
Sleep Mode (Note 3)
VIN = 3V to 18V
9
15
A
Shutdown
VIN = 3V to 18V, VRUN = 0V
6
12
A
RON
Switch Resistance
ISW = 100mA
1.4
1.6
IPEAK
Current Comp Max Current Trip Threshold
RSENSE = 0
325
400
mA
RSENSE = 1.1
70
76
85
mA
VSENSE
Current Comp Sense Voltage Trip Threshold
q
90
100
110
mV
VHYST
Voltage Comparator Hysteresis
5mV
tOFF
Switch Off-Time
VOUT at Regulated Value
3.5
4.75
6.0
s
VOUT = 0V
65
s
VLBI, TRIP
Low Battery Comparator Threshold
q
1.16
1.23
1.27
V
VRUN
Run/ON Pin Threshold
0.4
0.7
1.0
V
VLBI, OFF
OFF Pin Threshold (LTC1475 Only)
0.4
0.7
1.0
V
ILBO, SINK
Sink Current into Pin 2
VLBI = 0V, VLBO = 0.4V
0.45
0.70
mA
IRUN, SOURCE
Source Current from Pin 8
VRUN = 0V
0.4
0.8
1.2
A
ISW, LEAK
Switch Leakage Current
VIN = 18V, VSW = 0V, VRUN = 0V
0.015
1
A
ILBI, LEAK
Leakage Current into Pin 3
VLBI = 18V, VIN = 18V
0
0.1
A
ILBO, LEAK
Leakage Current into Pin 2
VLBI = 2V, VLBO = 5V
0
0.5
A
ELECTRICAL CHARACTERISTICS TA = 25°C, VIN = 10V, VRUN = open, RSENSE = 0, unless otherwise noted.
The q denotes specifications which apply over the full operating
temperature range.
Note 1: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formulas:
LTC1474CS8/LTC1475CS8: TJ = TA + (PD 110°C/W)
LTC1474CMS8/LTC1475CMS8: TJ = TA + (PD 150°C/W)
Note 2: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 3: No load supply current consists of sleep mode DC current (9
A
typical) plus a small switching component (about 1
A for Figure 1 circuit)
necessary to overcome Schottky diode and feedback resistor leakage.
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LTC1474CS8PBF 制造商:Linear Technology 功能描述:LTC1474CS8PBF