参数资料
| 型号： | LT3681EDE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 14DFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.27 V ~ 20 V |
| 输入电压： | 3.6 V ~ 34 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 300kHz ~ 2.8MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 14-DFN-EP（4x3） |
LT3681
PI FU CTIO S
PG (Pin 1): The PG pin is the open collector output of an
internal comparator. PG remains low until the FB pin is
within 10% of the ?nal regulation voltage. PG output is
valid when V IN is above 3.5V and RUN/SS is high.
BIAS (Pin 2): The BIAS pin supplies the current to the
LT3681’s internal regulator. Tie this pin to the lowest
available voltage source above 3V (typically V OUT ). This
architecture increases ef?ciency especially when the input
voltage is much higher than the output.
FB (Pin 3): The LT3681 regulates the FB pin to 1.265V.
Connect the feedback resistor divider tap to this pin.
V C (Pin 5): The V C pin is the output of the internal error
ampli?er. The voltage on this pin controls the peak switch
current. Tie an RC network from this pin to ground to
compensate the control loop.
RT (Pin 6): Oscillator Resistor Input. Connecting a resistor
to ground from this pin sets the switching frequency.
DA (Pin 8): This is the anode of the integrated power
Schottky diode. High frequency, large amplitude currents
?ow through this pin, so tie it to ground through a low
impedance connection.
DC (Pin 9, Exposed Pad 16): These pins connect to the
cathode of the integrated power Schottky diode. High fre-
quency, large amplitude currents ?ow through these pins,
so tie them to SW through a low impedance connection.
BD (Pin 10): This pin connects to the anode of the internal
boost Schottky diode.
BOOST (Pin 11): This pin is used to provide a drive
voltage, higher than the input voltage, to the internal
bipolar NPN power switch. Connect a capacitor between
this pin and SW.
SW (Pin 12): The SW pin is the output of the internal
power switch. Connect this pin to the inductor, DC and
boost capacitor.
V IN (Pin 13): The V IN pin supplies current to the LT3681’s
internal regulator and to the internal power switch. This
pin must be locally bypassed.
RUN/SS (Pin 14): The RUN/SS pin is used to put the
LT3681 in shutdown mode. Tie to ground to shut down
the LT3681. Tie to 2.3V or more for normal operation. If
the shutdown feature is not used, tie this pin to the V IN
pin. RUN/SS also provides a soft-start function; see the
Applications Information section.
GND (Pins 4, 7, Exposed Pad 15): All three of these
terminals internally connect to the LT3681 control IC’s
signal return, while exposed pad 15 performs the added
function of providing a low thermal resistance heat ?ow
path between the IC and the system heatsink. Tie all of
these terminals to a copper pour on the top layer of the
printed circuit board. Please refer to the Applications
Information section for more details.
3681f
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3682 | 制造商:LINER 制造商全称:Linear Technology 功能描述:42V, 750mA Step-Down Regulator with 2.5μA |
| LT3682EDD#PBF | 功能描述:IC REG BUCK ADJ 1A 12DFN 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 |
| LT3682EDD#TRPBF | 功能描述:IC REG BUCK ADJ 1A 12DFN 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 |
| LT3682EDD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1A Micropower Step-Down |
| LT3682EDD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1A Micropower Step-Down |
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