- 您现在的位置：买卖IC网 > PDF目录14802 > LT3680EDD#PBF (Linear Technology)IC REG BUCK ADJ 3.5A 10DFN PDF资料下载
参数资料
| 型号： | LT3680EDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 15/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 3.5A 10DFN |
| 标准包装： | 121 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.79 V ~ 30 V |
| 输入电压： | 3.6 V ~ 36 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 230kHz ~ 2.45MHz |
| 电流 - 输出： | 3.5A |
| 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-WFDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 10-DFN（3x3） |
| 产品目录页面： | 1332 (CN2011-ZH PDF) |
LT3680
APPLICATIONS INFORMATION
V OUT
6.0
BD
5.5
TO START
V IN
V IN
BOOST
LT3680
C3
5.0
(WORST CASE)
4.5
4.7μF
GND
SW
4.0
TO RUN
3.5
3.0
V OUT = 3.3V
(5a) For V OUT > 2.8V
2.5
2.0
T A = 25°C
L = 8.2μH
f = 700kHz
BD
D2
V OUT
1
10
100 1000
LOAD CURRENT (mA)
10000
BOOST
8.0
V IN
V IN
LT3680
C3
7.0
TO START
4.7μF
GND
SW
6.0
(WORST CASE)
5.0
TO RUN
(5b) For 2.5V < V OUT < 2.8V
4.0
V OUT
3.0
V OUT = 5V
T A = 25°C
L = 8.2μH
BD
BOOST
2.0
1
f = 700kHz
10
100 1000
10000
V IN
V IN
LT3680
C3
LOAD CURRENT (mA)
3680 F06
4.7μF
GND
SW
Figure 6. The Minimum Input Voltage Depends on
Output Voltage, Load Current and Boost Circuit
3680 FO5
(5c) For V OUT < 2.5V; V IN(MAX) = 30V
Figure 5. Three Circuits For Generating The Boost Voltage
will present a load to the switcher, which will allow it to
start. The plots show the worst-case situation where V IN
is ramping very slowly. For lower start-up voltage, the
boost diode can be tied to V IN ; however, this restricts the
input range to one-half of the absolute maximum rating
of the BOOST pin.
At light loads, the inductor current becomes discontinuous
and the effective duty cycle can be very high. This reduces
the minimum input voltage to approximately 300mV above
V OUT . At higher load currents, the inductor current is
continuous and the duty cycle is limited by the maximum
duty cycle of the LT3680, requiring a higher input voltage
Soft-Start
The RUN/SS pin can be used to soft-start the LT3680,
reducing the maximum input current during start-up.
The RUN/SS pin is driven through an external RC ?lter to
create a voltage ramp at this pin. Figure 7 shows the start-
up and shut-down waveforms with the soft-start circuit.
By choosing a large RC time constant, the peak start-up
current can be reduced to the current that is required to
regulate the output, with no overshoot. Choose the value
of the resistor so that it can supply 20μA when the RUN/SS
pin reaches 2.5V.
Synchronization
To select Low-Ripple Burst Mode operation, tie the SYNC
pin below 0.3V (this can be ground or a logic output).
to maintain regulation.
3680fb
15
相关PDF资料 |
PDF描述 |
|---|---|
| GCB40DHND | CONN EDGECARD 80POS .050 DIP SLD |
| RCC40DRYH | CONN EDGECARD 80POS DIP .100 SLD |
| V110C24T100BF2 | CONVERTER MOD DC/DC 24V 100W |
| RCC40DRXS | CONN EDGECARD 80POS DIP .100 SLD |
| CDR125NP-681MC | POWER INDUCTOR 680UH 0.40A SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3680EDD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:36V, 3.5A, 2.4MHz Step-Down Switching Regulator with 75μA Quiescent Current |
| LT3680EMSE#PBF | 功能描述:IC REG BUCK ADJ 3.5A 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 |
| LT3680EMSE#TRPBF | 功能描述:IC REG BUCK ADJ 3.5A 10MSOP RoHS:是 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 |
| LT3680EMSEPBF | 制造商:Linear Technology 功能描述:3.5A, 2.4MHz Step Down Regulator LT3680 |
| LT3680EMSE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:36V, 3.5A, 2.4MHz Step-Down Switching Regulator with 75μA Quiescent Current |
发布紧急采购，3分钟左右您将得到回复。