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参数资料
| 型号： | LTC1938IDD#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 4 A SWITCHING REGULATOR, 3300 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, LEAD FREE, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件页数： | 18/24页 |
| 文件大小： | 272K |
| 代理商： | LTC1938IDD#TRPBF |
LT1938
3
1938f
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Error Amp gm
330
μMho
Error Amp Gain
1000
VC Source Current
75
μA
VC Sink Current
100
μA
VC Pin to Switch Current Gain
3.5
A/V
VC Clamp Voltage
2V
Switching Frequency
RT = 8.66k
RT = 29.4k
RT = 187k
2.7
1.25
250
3.0
1.4
300
3.3
1.55
350
MHz
kHz
Minimum Switch Off-Time
●
100
150
nS
Switch Current Limit
Duty Cycle = 5%
3.1
3.6
4.0
A
Switch VCESAT
ISW = 2A
360
mV
Boost Schottky Reverse Leakage
VSW = 10V, VBIAS = 0V
0.02
2
μA
Minimum Boost Voltage (Note 4)
●
1.6
2.1
V
BOOST Pin Current
ISW = 1A
18
30
mA
RUN/SS Pin Current
VRUN/SS = 2.5V
5
10
μA
RUN/SS Input Voltage High
2.5
V
RUN/SS Input Voltage Low
0.2
V
PG Threshold Offset from Feedback Voltage
VFB Rising
100
mV
PG Hysteresis
10
mV
PG Leakage
VPG = 5V
0.1
1
μA
PG Sink Current
VPG = 0.4V
●
100
300
μA
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 LT1938E is guaranteed to meet performance specications
from 0°C to 125°C. Specications over the –40°C to 125°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LT1938I specications are
guaranteed over the –40°C to 125°C temperature range.
Note 3: Bias current measured in regulation. Bias current ows into the FB
pin.
Note 4: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
The
● denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VIN = 10V, VRUN/SS = 10V VBOOST = 15V, VBIAS = 3.3V unless otherwise
noted. (Note 2)
ELECTRICAL CHARACTERISTICS
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