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| 型号： | LT3682EDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 16/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1A 12DFN |
| 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： | 0.8 V ~ 20 V |
| 输入电压： | 3.6 V ~ 36 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 250kHz ~ 2.2MHz |
| 电流 - 输出： | 1A |
| 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： | 12-WFDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 12-DFN |
| 产品目录页面： | 1332 (CN2011-ZH PDF) |
LT3682
APPLICATIONS INFORMATION
Table 3. Schottky Diodes
compensation is provided by the components tied to the V C
PART NUMBER
On Semiconducor
MBR0520L
MBR0540
MBRM120E
MBRM140
V R (V)
20
40
20
40
I AVE (A)
0.5
0.5
1
1
V F at 1A (mV) V F at 2A (mV)
620
530 595
550
pin, as shown in Figure 2. Generally a capacitor (C C ) and a
resistor (R C ) in series to ground are used. In addition, there
may be a lower value capacitor in parallel. This capacitor
(C F ) is used to ?lter noise at the switching frequency, and
is required only if a phase-lead capacitor (C PL ) is used or
if the output capacitor has high ESR.
Diodes Inc.
LT3682
B0530W
B0540W
30
40
0.5
0.5
620
CURRENT MODE
POWER STAGE
g m = 1.25S
SW
FB
R1
C PL
OUTPUT
B120
B130
B140
20
30
40
1
1
1
500
500
500
3Meg
g m = 420μS
0.8V
+
ESR
C1
C1
B150
B220
B230
50
20
30
1
2
2
700
500
500
V C
C F
R C
C C
GND
R2
POLYMER
OR
TANTALUM
OR
ELECTROLITIC
CERAMIC
B140HB
40
1
3682 F02
DFLS240L
DFLS140
B240
40
40
40
2
1.1
2
510
500
500
Figure 2. Model for Loop Response
Loop compensation determines the stability and transient
Central Semiconductor
performance. Optimizing the design of the compensation
CMSH1 – 40M
CMSH1 – 60M
40
60
1
1
500
700
network depends on the application and type of output
capacitor. A practical approach is to start with one of the
CMSH1 – 40ML
CMSH2 – 40M
CMSH2 – 60M
CMSH2 – 40L
CMSH2 – 40
CMSH2 – 60
40
40
60
40
40
60
1
2
2
2
2
2
400
550
700
400
500
700
circuits in this data sheet that is similar to your application
and tune the compensation network to optimize the
performance. Stability should then be checked across all
operating conditions, including load current, input voltage
and temperature. The LT1375 data sheet contains a more
thorough discussion of loop compensation and describes
how to test the stability using a transient load. Figure 2
Frequency Compensation
The LT3682 uses current mode control to regulate the
output. This simpli?es loop compensation. In particular,
the LT3682 does not require the ESR of the output capacitor
for stability, so you are free to use ceramic capacitors to
achieve low output ripple and small circuit size. Frequency
shows an equivalent circuit for the LT3682 control loop.
The error ampli?er is a transconductance ampli?er with
?nite output impedance. The power section, consisting
of the modulator, power switch and inductor, is modeled
as a transconductance ampli?er generating an output
current proportional to the voltage at the V C pin. Note that
the output capacitor integrates this current, and that the
3682f
16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3682EDD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1A Micropower Step-Down |
| LT3682IDD#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:- 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 |
| LT3682IDD#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BUCK 2.2MHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, 2.2MHZ, DFN-12 |
| LT3682IDD#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 |
| LT3682IDD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1A Micropower Step-Down |
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