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| 型号： | LT1371CSW#TR |
| 厂商： | Linear Technology |
| 文件页数： | 5/16页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG ADJ 20SOIC |
| 标准包装： | 1,000 |
| 类型： | 降压（降压），升压（升压），反相，Cuk，回扫，正向转换器 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.25 V ~ 35 V |
| 输入电压： | 2.7 V ~ 25 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 500kHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 20-SOIC |
LT1371
TYPICAL PERFOR M A N CE CHARACTERISTICS
2.4
V C Pin Threshold and High
Clamp Voltage vs Temperature
800
Feedback Input Current
vs Temperature
0
Negative Feedback Input Current
vs Temperature
2.2
2.0
1.8
1.6
1.4
V C HIGH CLAMP
700
600
500
400
V FB =V REF
–10
–20
V NFB =V NFR
1.2
1.0
0.8
0.6
V C THRESHOLD
300
200
100
–30
–40
0.4
–50 –25
0
25
50
75
100 125 150
0
–50 –25
0
25
50
75
100 125 150
–50
–50 –25
0
25
50
75
100 125 150
TEMPERATURE ( ° C)
PI N FU N CTIO N S
LT1371 ? G10
TEMPERATURE ( ° C)
LT1371 ? G11
TEMPERATURE ( ° C)
LT1371 ? G12
V C : The Compensation pin is used for frequency compen-
sation, current limiting and soft start. It is the output of the
error amplifier and the input of the current comparator.
Loop frequency compensation can be performed with an
RC network connected from the V C pin to ground.
FB: The Feedback pin is used for positive output voltage
sensing and oscillator frequency shifting. It is the invert-
ing input to the error amplifier. The noninverting input of
this amplifier is internally tied to a 1.245V reference. Load
on the FB pin should not exceed 250 μ A when NFB pin is
used. See Applications Information.
NFB: The Negative Feedback pin is used for negative
output voltage sensing. It is connected to the inverting
input of the negative feedback amplifier through a 100k
source resistor.
S/S (R and T7 Packages Only): Shutdown and Synchroni-
zation Pin. The S/S pin is logic level compatible. Shutdown
is active low and the shutdown threshold is typically 1.3V.
For normal operation, pull the S/S pin high, tie it to V IN or
leave it floating. To synchronize switching, drive the S/S
pin between 600kHz and 800kHz.
SHDN: (SW Package Only): The Shutdown pin is active
low and the shutdown threshold is typically 1.3V. For
normal operation, pull the SHDN pin high, tie it to V IN or
leave it floating.
SYNC (SW Package Only): To synchronize switching,
drive the SYNC pin between 600kHz and 800kHz. If not
used, the SYNC pin can be tied high, low or left floating.
V IN : Bypass Input Supply pin with a low ESR capacitor,
10 μ F or more. The regulator goes into undervoltage lock-
out when V IN drops below 2.5V. Undervoltage lockout
stops switching and pulls the V C pin low.
V SW : The Switch pin is the collector of the power switch
and has large currents flowing through it. Keep the traces
to the switching components as short as possible to
minimize radiation and voltage spikes.
GND: Tie all Ground pins to a good quality ground plane.
5
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| LT1371HVCR | 功能描述:IC REG MULTI CONFIG ADJ 3A D2PAK RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
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