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參數(shù)資料
| 型號： | LT3494EDDB |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.25 A SWITCHING REGULATOR, PDSO8 |
| 封裝： | 3 X 2 MM, PLASTIC, MO-229WECD-1, DFN-8 |
| 文件頁數(shù)： | 6/12頁 |
| 文件大小： | 261K |
| 代理商： | LT3494EDDB |
LT3494/LT3494A
3
3494fb
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 LT3494/LT3494A are 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.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
CTRL Pin Bias Current
VCTRL = 0.5V, Current Flows Out of Pin
●
20
100
nA
CTRL to FB Offset
VCTRL = 0.5V
8
15
mV
Maximum Shunt Current
VFB = 1.3V, VCAP = 5V
230
μA
Note 3: Internal reference voltage is determined by nding VFB voltage
level which causes quiescent current to increase 20μA above “Not
Switching” level.
Note 4: If CTRL is overriding the internal reference, Start-Up mode occurs
when VFB is less then half the voltage on CTRL. If CTRL is not overriding
the internal reference, Start-Up mode occurs when VFB is less then half the
voltage of the internal reference.
Note 5: Current limit guaranteed by design and/or correlation to static test.
ELECTRICAL CHARACTERISTICS The ● denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VCC = 3V, VSHDN = VCC, unless otherwise noted. (Note 2)
TYPICAL PERFORMANCE CHARACTERISTICS
Switching Frequency
vs Load Currrent
Load Regulation
VOUT vs CTRL Voltage
LOAD CURRENT (mA)
0.1
800
SWITCHING
FREQUENCY
(kHz) 1000
1200
1400
1
10
100
3494 G01
600
400
200
0
LT3494
FIGURE 5 CIRCUIT
VCC = 3.6V
VOUT = 16V
LOAD CURRENT (mA)
0
V
OUT
VOLTAGE
CHANGE
(%)
0
1.0
40
3494 G02
–1.0
–2.0
10
20
30
5
15
25
35
2.0
–0.5
0.5
–1.5
1.5
LT3494
FIGURE 5 CIRCUIT
VCC = 3.6V
VOUT = 16V
CTRL VOLTAGE (V)
0.1
0
V
OUT
VOLTAGE
(V)
5
10
15
20
0.3
0.5
0.7
0.9
3494 G03
1.1
1.3
1.5
LT3494
FIGURE 5 CIRCUIT
VCC = 3.6V
VOUT = 16V
LOAD CURRENT = 1mA
TA = 25°C unless otherwise noted.
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