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参数资料
| 型号： | LT3973IMSE-3.3#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 3.3V 0.75A 10MSOP |
| 标准包装： | 50 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 3.3V |
| 输入电压： | 4.2 V ~ 42 V |
| PWM 型： | 电流模式，Burst Mode? |
| 频率 - 开关： | 195kHz ~ 2.15MHz |
| 电流 - 输出： | 750mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 10-MSOP 裸露焊盘 |
LT3973/LT3973-3.3/LT3973-5
PIN FUNCTIONS
FB (Pin 1, LT3973 Only): The LT3973 regulates the FB
pin to 1.21V. Connect the feedback resistor divider tap
to this pin.
V OUT (Pin 1, LT3973-3.3 and LT3973-5 Only): The
LT3973-3.3 and LT3973-5 regulate the V OUT pin to 3.3V
and 5V, respectively. This pin connects to the internal
feedback divider that programs the fixed output voltage.
OUT (Pin 2): The LT3973 regulates the V IN to V OUT voltage
for dropout conditions. It will also pull current from this
pin to charge the boost capacitor when needed. Connect
this pin to the output. If programmed output is greater
than 14V, tie this pin to GND.
EN/UVLO (Pin 3): The part is in shutdown when this pin is
low and active when this pin is high. The threshold voltage
is 1.19V going up with 30mV of hysteresis. Tie to V IN if
shutdown feature is not used. The EN/UVLO threshold is
accurate only when V IN is above 4.2V. If V IN is lower than
4.2V, ground EN/UVLO to place the part in shutdown.
GND (Pin 5, Exposed Pad Pin 11): Ground. The exposed
pad must be soldered to the PCB.
SW (Pin 6): The SW pin is the output of an internal power
switch. Connect this pin to the inductor.
BOOST (Pin 7): This pin is used to provide a drive volt-
age, higher than the input voltage, to the internal bipolar
NPN power switch.
BD (Pin 8): This pin connects to the anode of the boost
diode. This pin also supplies current to the LT3973’s internal
regulator when BD is above 3.2V.
PG (Pin 9): The PG pin is the open-drain output of an
internal comparator. PG remains low until the FB pin is
within 10% of the final regulation voltage. PG is valid when
V IN is above 4.2V and EN/UVLO is high.
RT (Pin 10): A resistor is tied between RT and ground to
set the switching frequency.
V IN (Pin 4): The V IN pin supplies current to the LT3973’s
internal circuitry and to the internal power switch. This
pin must be locally bypassed.
3973fa
9
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| LT3973IMSE-5#PBF | 功能描述:IC REG BUCK 5V 0.75A 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 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:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LT3973IMSE-5#TRPBF | 功能描述:IC REG BUCK 5V 0.75A 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 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-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT3975 | 制造商:LINER 制造商全称:Linear Technology 功能描述:42V, 2.5A, 2MHz Step-Down Switching Regulator with 2.7??A Quiescent Current |
| LT3975EMSE#PBF | 功能描述:IC REG BUCK 2.5A 16MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:MIC23xxx HyperLight Load™ Regulators 标准包装:5,000 系列:HyperLight Load® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.8V 输入电压:2.7 V ~ 5.5 V PWM 型:混合物 频率 - 开关:4MHz 电流 - 输出:2A 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-VFDFN 裸露焊盘，8-MLF? 包装:带卷 (TR) 供应商设备封装:8-MLF?（2x2） 产品目录页面:1094 (CN2011-ZH PDF) 其它名称:576-3303-2 |
| LT3975EMSE#TRPBF | 功能描述:IC REG BUCK 2.5A 16MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 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-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
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