參數(shù)資料
型號(hào)： LT3470AIDDB#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： 0.56 A SWITCHING REGULATOR, PDSO8
封裝： 3 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-229WECD-1, DFN-8
文件頁(yè)數(shù)： 14/20頁(yè)
文件大?。?/td> 197K
代理商： LT3470AIDDB#PBF
LT3470A
3
3470afb
ELECTRICAL CHARACTERISTICS
The
l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
VIN = 10V, VSHDN = 10V, VBOOST = 15V, VBIAS = 3V unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Input Voltage
●
4V
Quiescent Current from VIN
VSHDN = 0.2V
VBIAS = 3V, Not Switching
VBIAS = 0V, Not Switching
●
0.1
10
40
0.5
18
55
μA
Quiescent Current from Bias
VSHDN = 0.2V
VBIAS = 3V, Not Switching
VBIAS = 0V, Not Switching
●
0.1
30
0.1
0.5
60
1.5
μA
FB Comparator Trip Voltage
VFB Falling
●
1.228
1.250
1.265
V
FB Pin Bias Current (Note 3)
VFB = 1V
H-Grade
●
35
80
150
225
nA
FB Voltage Line Regulation
4V < VIN < 40V
0.0006
0.02
%/V
Minimum Switch Off-Time (Note 5)
500
ns
Maximum Duty Cycle
●
90
95
%
Switch Leakage Current
0.7
1.5
μA
Switch VCESAT
ISW = 100mA
150
mV
Switch VCESAT Without Boost
VBOOST = VSW
0.9
1.2
V
Switch Top Current Limit
VFB = 0V
320
440
560
mA
Switch Bottom Current Limit
VFB = 0V
280
mA
Catch Schottky Drop
ISW = 100mA
600
mV
Catch Schottky Reverse Leakage
VSW = 10V
0.2
2
μA
Boost Schottky Drop
IBIAS = 50mA
690
775
mV
Boost Schottky Reverse Leakage
VSW = 10V, VBIAS = 0V
0.2
2
μA
Minimum Boost Voltage (Note 4)
●
1.7
2.2
V
BOOST Pin Current
ISW = 100mA
2.3
5
mA
Bias Pin Preload
VBOOST = 10V
50
mA
SHDN Pin Current
VSHDN = 2.5V
1
5
μA
SHDN Input Voltage High
2V
SHDN Input Voltage Low
0.2
V
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT3470AE is guaranteed to meet performance specications
from 0°C to 85°C. Specications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LT3470AI specications are
guaranteed over the –40°C to 125°C temperature range. LT3470AH
specications are guaranteed over the –40°C to 150°C temperature range.
Note 3: Bias current ows out of the FB pin.
Note 4: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
Note 5: This parameter is assured by design and correlation with statistical
process controls.
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