- 您现在的位置：买卖IC网 > PDF目录44986 > LT3686AIDD#PBF (LINEAR TECHNOLOGY CORP) 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 PDF资料下载
参数资料
| 型号： | LT3686AIDD#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, LEAD FREE, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件页数： | 4/30页 |
| 文件大小： | 504K |
| 代理商： | LT3686AIDD#PBF |
第1页第2页第3页当前第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页
LT3686A
12
3686afa
to keep the inductor valley current to 1.7A (Figure 5). Peak
inductor current is therefore peak current plus minimum
switch delay:
1.7A + (VIN – VOUT)/L100ns
ApplicAtions inForMAtion
Table 1. RT vs Frequency
FREQUENCY (MHz)
RT (kΩ)
MIN SYNC FREQUENCY (MHz)
2.5
9.53
N/A
2.3
12.1
N/A
2.1
15.4
N/A
1.9
20.0
N/A
1.8
22.6
2.50
1.7
25.5
2.30
1.5
31.6
1.99
1.3
40.2
1.70
1.1
52.3
1.42
0.9
69.8
1.14
0.7
97.6
0.874
0.5
150
0.615
0.3
280
0.363
FREQUENCY (MHz)
50
100
R
T(k)
200
250
300
150
0
0.5
1
1.5
2
2.5
3686A F06a
0
FREQUENCY (MHz)
5
10
INDUCT
ANCE
(H)
20
25
40
30
35
15
0.25
0.75
5VOUT
1.25
1.75
2.25
3686A F06b
0
12VOUT
3.3VOUT
Figure 6a. Switching Frequency vs RT
Figure 6b. Suggested Inductance vs Frequency
Figure 5. Pulse Skip with Large Load Current Will Be Limited by
the DA Valley Current Limit. Notice the Flat Inductor Valley
Current and Reduced Switching Frequency
VIN = 35V
VOUT = 3.3V
L = 6.8H
COUT = 22F
IOUT = 1.2A
VSW
10V/DIV
IL
500mA/DIV
VOUT
100mA/DIV
AC
2s/DIV
3686A F05
The part is robust enough to survive prolonged opera-
tion under these conditions as long as the peak inductor
current does not exceed 2A. Inductor current saturation
and junction temperature may further limit performance
during this operating regime.
Frequency Selection
The maximum frequency that the LT3686A can be pro-
grammed to is 2.5MHz. The minimum frequency that the
LT3686A can be programmed to is 300kHz. The switching
frequency is programmed by tying a 1% resistor from the
RT pin to ground. Table 1 can be used to select the value
of RT. Minimum on-time and edge loss must be taken into
consideration when selecting the intended frequency of
operation. Higher switching frequency increases power
dissipation and lowers efficiency. Finite transistor band-
width limits the speed at which the power switch can be
turned on and off, effectively setting the minimum on-time
of the LT3686A. For a given output voltage, the minimum
on-time determines the maximum input voltage to remain
in continuous mode operation outlined in the Minimum On
Time section of the data sheet. Finite transition time results
in a small amount of power dissipation each time the power
switch turns on and off (edge loss). Edge loss increases
with frequency, switch current, and input voltage.
相关PDF资料 |
PDF描述 |
|---|---|
| LT3686AIDD#TRPBF | 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| LT3686EDD#PBF | 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| LT3686IDD#TRPBF | 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| LT3688IFE#TRPBF | SWITCHING REGULATOR, PDSO24 |
| LT3688EUF#PBF | SWITCHING REGULATOR, PQCC24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3686AIMSE#PBF | 功能描述:IC REG BUCK ADJ 1.2A 12MSOP 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 |
| LT3686AIMSE#TRPBF | 功能描述:IC REG BUCK ADJ 1.2A 12MSOP 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 |
| LT3686EDD | 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 |
| LT3686EDD#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: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 |
| LT3686EDD#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 |
发布紧急采购，3分钟左右您将得到回复。