參數(shù)資料
型號(hào)： LT1934EDCB-1
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 0.49 A SWITCHING REGULATOR, PDSO6
封裝： 2 X 3 MM, 0.80 MM HEIGHT, PLASTIC, MO-229, DFN-6
文件頁(yè)數(shù)： 14/20頁(yè)
文件大小： 234K
代理商： LT1934EDCB-1
LT1934/LT1934-1
3
1934fe
ELECTRICAL CHARACTERISTICS
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 LT1934E and LT1934E-1 are guaranteed to meet performance
specications from 0°C to 85°C. Specications over the –40°C to 85°C
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Undervoltage Lockout
–40°C ≤ TA ≤ 85°C
–40°C ≤ TA ≤ 125°C
l
3
3.2
3.6
V
Quiescent Current
VFB = 1.3V
–40°C ≤ TA ≤ 85°C
–40°C ≤ TA ≤ 125°C
l
12
22
26
μA
VSHDN = 0V
0.01
2
μA
FB Comparator Trip Voltage
VFB Falling
–40°C ≤ TA ≤ 85°C
–40°C ≤ TA ≤ 125°C
l
1.22
1.21
1.25
1.27
V
FB Comparator Hysteresis
10
mV
FB Pin Bias Current
VFB = 1.25V
–40°C ≤ TA ≤ 85°C
–40°C ≤ TA ≤ 125°C
l
2
±15
±60
nA
FB Voltage Line Regulation
4V < VIN < 34V
0.007
%/V
Switch Off Time
VFB > 1V
VFB = 0V
1.4
1.8
12
2.3
μs
Maximum Duty Cycle
VFB = 1V
–40°C ≤ TA ≤ 85°C
–40°C ≤ TA ≤ 125°C
l
85
83
88
%
Switch VCESAT
ISW = 300mA (LT1934, S6 Package)
ISW = 300mA (LT1934, DCB Package)
ISW = 75mA (LT1934-1, S6 Package)
ISW = 75mA (LT1934-1, DCB Package)
200
225
65
70
300
120
mV
Switch Current Limit
LT1934
LT1934-1
350
90
400
120
490
160
mA
BOOST Pin Current
ISW = 300mA (LT1934)
ISW = 75mA (LT1934-1)
8.5
6.0
12
10
mA
Minimum Boost Voltage (Note 3)
ISW = 300mA (LT1934)
ISW = 75mA (LT1934-1)
1.8
1.7
2.5
V
Switch Leakage Current
2μA
SHDN Pin Current
VSHDN = 2.3V
VSHDN = 34V
0.5
1.5
5
μA
SHDN Input Voltage High
2.3
V
SHDN Input Voltage Low
0.25
V
The
l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VIN = 10V, VBOOST = 15V, unless otherwise noted.
operating temperature range are assured by design, characterization and
correlation with statistical process controls. The LT1934I and LT1934I-1
specications are guaranteed over the –40°C to 125°C temperature range.
Note 3: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the internal power switch.
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