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参数资料
| 型号： | LTC3785EUF-1#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 650 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封装： | 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD, QFN-24 |
| 文件页数： | 15/20页 |
| 文件大小： | 213K |
| 代理商： | LTC3785EUF-1#TRPBF |
LTC3785-1
4
37851fa
TYPICAL PERFORMANCE CHARACTERISTICS
LOAD CURRENT (A)
0.0001
EFFICIENCY
(%)
60
80
100
1
37851 G01
40
20
50
70
90
30
10
0
0.001
0.01
0.1
10
VIN = 4.2V
VIN = 3.6V
VIN = 3V
Burst Mode
OPERATION
FIXED
FREQUENCY
MOSFET Si7940
L = 4.7μH WURTH WE-PD
fOSC = 500kHz
LOAD CURRENT (A)
0.0001
0.001
0.01
0.1
1
40
EFFICIENCY
(%)
50
60
70
80
10
37851 G02
30
20
10
0
90
100
VIN = 8.4V
VIN = 7.2V
VIN = 5.4V
MOSFET Si7940
L = 5.6μH MSS1260
fOSC = 430kHz
Burst Mode
OPERATION
FIXED
FREQUENCY
LOAD CURRENT (A)
0.0001
0.001
0.01
0.1
1
40
EFFICIENCY
(%)
50
60
70
80
10
37851 G03
30
20
10
0
90
100
VIN = 9V
VIN = 4.2V
VIN = 3.6V
VIN = 2.7V
MOSFET Si7940
L = 5.6μH MSS1260
fOSC = 430kHz
Burst Mode
OPERATION
FIXED
FREQUENCY
VOUT
50mV/DIV
AC
COUPLED
INDUCTOR
CURRENT
1A/DIV
5μs/DIV
VOUT = 3.3V
COUT = 100μF
37851 G04
VOUT
500mV/DIV
VIN
3V TO 8.5V
500μs/DIV
ILOAD = 300μA
VOUT =5V
37851 G05
VOUT
200mV/
DIV
ILOAD
10mA TO 2A
100μs/DIV
VIN = 3.6V
VOUT = 3.3V
C
100μF
37851 G06
Burst Mode Ripple
Line Transient Response
VOUT Load Transient
Li-Ion to 3.3V Efciency
vs Load Current
Two Li-Ion to 7V Efciency
vs Load Current
Li-Ion/9V to 5V VOUT Efciency
vs Load Current
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 LTC3785E-1 is guaranteed to meet performance specications
from 0°C to 85°C. Specications over –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Specication is guaranteed by design and not 100% tested in production.
Note 4: Current measurements are performed when the outputs are not switching.
Note 5: The IC is tested in a feedback loop to make the measurement.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
PGOOD Output Low
IPGOOD = 500μA
200
500
mV
PGOOD Leakage
VPGOOD = 5.5V
5
μA
VSENSE Input Current
VSENSE = Measured FB Voltage
1
500
nA
ELECTRICAL CHARACTERISTICS The l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VIN = ISVOUT = VDRV = VBST1 = VBST2 = 3.6V, RT = 49.9k, RILSET = 59k.
相关PDF资料 |
PDF描述 |
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| LTC3785EUF-1#PBF | 3 A SWITCHING REGULATOR, 650 kHz SWITCHING FREQ-MAX, PQCC24 |
| LTC3823EUH | 4 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PQCC32 |
| LTC3823EGN | 4 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO28 |
| LTC3823EUH#TR | 4 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PQCC32 |
| LTC3823EGN#TR | 4 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO28 |
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