参数资料
| 型号： | LT3686HDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/28页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1.2A 10DFN |
| 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： | 0.8 V ~ 30 V |
| 输入电压： | 3.6 V ~ 37 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 300kHz ~ 2.5MHz |
| 电流 - 输出： | 1.2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 150°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-DFN（3x3） |
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LT3686
PIN FUNCTIONS
V IN (Pin 1): The V IN pin supplies current to the LT3686’s
internal regulator and to the internal power switch. This
pin must be locally bypassed.
BD (Pin 2): The BD pin is used to provide current to
the internal Boost Schottky diode. Tie this pin to output
whenever possible. When the MODE pin is greater than
0.8V, the LT3686 will prevent pulse-skipping at light
loads by regulating an active load on the BD pin; see the
Applications Information section Fixed Frequency at Light
Load.
FB (Pin 3): The LT3686 regulates its feedback pin to 0.8V.
Connect the feedback resistor divider tap to this pin. Set
the output voltage according to V OUT = 0.8(1 + R1/R2). A
good value for R2 is 10k.
SS (Pin 4): Provides Soft-Start and Tracking. An internal
2μA current source tied to a 2.5V reference supplies cur-
rent to this pin to charge an external capacitor to create a
voltage ramp at the pin. Feedback voltage and switching
frequency both track SS voltage. Feedback voltage stops
tracking at 0.8V. SS is reset under all fault conditions. Float
the pin if soft-start feature is not being used.
RT (Pin 5): The RT pin is used to program the oscillator
frequency. Select the value of R T resistor according to
Table 1 in the applications section of the data sheet.
EN/UVLO (Pin 6): The EN/UVLO pin is used to start up the
LT3686. Pull the pin below 0.4V to shutdown the LT3686. The
1.27V threshold can function as an accurate undervoltage
lockout (UVLO), preventing the regulator from operating
until the input voltage has reached the programmed level.
Do not drive the EN/UVLO pin above V IN .
MODE (Pin 7): The MODE pin acts as mode select for the
BD active load; when it is tied high, the LT3686 will prevent
pulse skipping at light loads by regulating an active load on
the BD pin. To disable the active load, tie MODE to GND.
BOOST (Pin 8): The BOOST pin is used to provide a drive
voltage, higher than the input voltage, to the internal bipolar
NPN power switch.
DA (Pin 9): Connect catch diode (D1) anode to this pin.
SW (Pin 10): The SW pin is the output of the internal power
switch. Connect this pin to the inductor, catch diode and
boost capacitor.
GND (Exposed Pad Pin 11): The exposed pad GND pin is
the only ground connection for the device. The exposed
pad should be soldered to a large copper area to reduce
thermal resistance.
3686fc
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3686IDD | 制造商:LINER 制造商全称:Linear Technology 功能描述:37V/1.2A Step-Down Regulator in 3mm × 3mm DFN |
| LT3686IDD#PBF | 功能描述:IC REG BUCK ADJ 1.2A 10DFN 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 |
| LT3686IDD#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BUCK 2.5MHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, 2.5MHZ, DFN-10 |
| LT3686IDD#TRPBF | 功能描述:IC REG BUCK ADJ 1.2A 10DFN 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 |
| LT3686IDDPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:37V/1.2A Step-Down Regulator in 3mm × 3mm DFN |
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