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| 型号： | LTC3103EDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.3A 10DFN |
| 标准包装： | 121 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 13.8 V |
| 输入电压： | 2.5 V ~ 15 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1.2MHz |
| 电流 - 输出： | 300mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 10-DFN（3x3） |
LTC3103
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T A = 25°C (Note 2). V IN = 10V unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Feedback Voltage
Feedback Voltage Line Regulation
Feedback Input Current
Oscillator Frequency
(Note 5)
V IN = 2.5V to 15V (Note 5)
(Note 5)
T J = 0°C to 85°C (Note 4)
l
l
l
0.588
0.930
1
0.6
0.02
1
1.2
1.2
0.612
0.05
20
1.55
1.45
V
%/V
nA
MHz
MHz
Quiescent Current, V IN —Active
RUN = V IN , MODE = 0V, FB > 0.612 Nonswitching
600
μA
Quiescent Current, V IN — Sleep
Quiescent Current, V IN —Shutdown
N-Channel MOSFET Synchronous Rectifier
Leakage Current
N-Channel MOSFET Switch Leakage Current
N-Channel MOSFET Synchronous
Rectifier R DS(ON)
N-Channel MOSFET Switch R DS(ON)
RUN = V IN , FB > 0.612, MODE = V IN , T J = 0°C to 85°C (Note 4)
RUN = V IN , FB > 0.612, MODE = V IN
RUN = 0V, T J = 0°C to 85°C (Note 4)
RUN = 0V
V IN = V SW = 15V, V RUN = 0V
V IN = 15V, V SW = 0V, V RUN = 0V
I SW = 200mA
I SW = –200mA
l
l
1.8
1.8
1
1.8
0.01
0.01
0.85
0.65
2.6
3.3
1.7
3.3
0.3
0.3
μA
μA
μA
μA
μA
μA
Ω
Ω
Peak Current Limit
PGOOD Threshold
PGOOD Hysteresis
PGOOD Voltage Low
PGOOD Leakage Current
Maximum Duty Cycle
Switch Minimum Off Time (t OFF(MIN) )
Synchronous Rectifier Minimum On Time
(t ON(MIN) )
FB Falling, Percentage Below FB
Percentage of FB
I PGOOD = 100μA
V PGOOD = 5V
(Note 4)
(Note 4)
l
l
0.40
–14
89
0.50
–10
2
0.2
0.01
92
65
70
0.75
–5
0.3
A
%
%
V
μA
%
ns
ns
RUN Pin Threshold
RUN Pin Rising
l
0.76
0.80
0.85
V
RUN Pin Hysteresis
0.06
V
RUN Input Current
RUN = 1.2V
l
0.01
0.4
μA
MODE Threshold
l
0.5
0.8
1.2
V
MODE Input Current
Soft-Start Time
MODE = 1.2V
0.7
0.1
1.4
4
2.5
μA
ms
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 LTC3103 is tested under pulsed load conditions such that
T J ≈ T A . The LTC3103E is guaranteed to meet specifications from
0°C to 85°C junction temperature. Specifications over the –40°C to
125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3103I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The junction temperature (T J ) is calculated from the
ambient temperature (T A ) and power dissipation (P D ) according to the
formula:
T J = T A + (P D )( θ JA °C/W)
where θ JA is the package thermal impedance. Note the maximum ambient
temperature consistent with these specifications is determined by specific
operating conditions in conjunction with board layout, the rated package
thermal resistance and other environmental factors.
Note 3: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. The maximum
rated junction temperature will be exceeded when this protection is active.
Continuous operation above the specified absolute maximum operating
junction temperature may impair device reliability or permanently damage
the device.
Note 4: Specification is guaranteed by design.
Note 5: The LTC3103 has a proprietary test mode that allows testing in a
feedback loop which servos V FB to the balance point for the error amplifier.
3103f
3
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