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参数资料
| 型号： | LTC3631IMS8E#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/22页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.1A 8MSOP |
| 标准包装： | 50 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 45 V |
| 输入电压： | 4.5 V ~ 45 V |
| PWM 型： | Burst Mode? |
| 电流 - 输出： | 100mA |
| 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： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 8-MSOP-EP |
LTC3631
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are for T A = 25°C (Note 2). V IN = 10V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Supply (V IN )
V IN
Input Voltage Operating Range
4.5
45
V
UVLO
OVLO
I Q
V IN Undervoltage Lockout
V IN Overvoltage Lockout
DC Supply Current (Note 3)
Active Mode
Sleep Mode
Shutdown Mode
V IN Rising
V IN Falling
Hysteresis
V IN Rising
V IN Falling
Hysteresis
V RUN = 0V
l
l
3.80
3.75
47
45
4.15
4.00
150
50
48
2
125
12
3
4.50
4.35
52
50
220
22
6
V
V
mV
V
V
V
μA
μA
μA
Output Supply ( V OUT /V FB )
V OUT
V FB
Output Voltage Trip Thresholds
Feedback Comparator Trip Voltage
LTC3631-3.3V, V OUT Rising
LTC3631-3.3V, V OUT Falling
LTC3631-5V, V OUT Rising
LTC3631-5V, V OUT Falling
V FB Rising
l
l
l
l
l
3.260
3.240
4.940
4.910
0.792
3.310
3.290
5.015
4.985
0.800
3.360
3.340
5.090
5.060
0.808
V
V
V
V
V
V HYST
I FB
? V LINEREG
Feedback Comparator Hysteresis
Feedback Pin Current
Feedback Voltage Line Regulation
Adjustable Output Version, V FB = 1V
V IN = 4.5V to 45V
LTC3631-5, V IN = 6V to 45V
l
3
–10
5
0
0.001
7
10
mV
nA
%/V
Operation
V RUN
I RUN
V HYSTL
I HYST
I SS
t INTSS
Run Pin Threshold Voltage
Run Pin Leakage Current
Hysteresis Pin Voltage Low
Hysteresis Pin Leakage Current
Soft-Start Pin Pull-Up Current
Internal Soft-Start Time
RUN Rising
RUN Falling
Hysteresis
RUN = 1.3V
RUN < 1V, I HYST = 1mA
V HYST = 1.3V
V SS < 1.5V
SS Pin Floating
1.17
1.06
–10
–10
4.5
1.21
1.10
110
0
0.07
0
5.5
0.75
1.25
1.14
10
0.1
10
6.5
V
V
mV
nA
V
nA
μA
ms
I PEAK
Peak Current Trip Threshold
I SET Floating
500k Resistor from I SET to GND
I SET Shorted to GND
l
200
40
225
120
50
280
65
mA
mA
mA
R ON
Power Switch On-Resistance
Top Switch
Bottom Switch
I SW = –25mA
I SW = 25mA
3.0
1.5
Ω
Ω
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 LTC3631 is tested under pulsed load conditions such that
T J ≈ T A . The LTC3631E 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
LTC3631I is guaranteed over the full –40°C to 125°C operating junction
temperature range. Note that the maximum ambient temperature
consistent with these specifications is determined by specific operating
conditions in conjunction with board layout, the rated package thermal
impedance and other environmental factors. The junction temperature
(T J , in °C) is calculated from the ambient temperature (T A , in °C) and power
dissipation (PD, in Watts) according to the formula:
T J = T A + (PD ? θ JA )
where θ JA (in °C/W) is the package thermal impedance.
Note 3: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
3631fe
For more information www.linear.com/LTC3631
3
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