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参数资料
| 型号： | LT3502IDC |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.1 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 2 X 2 MM, PLASTIC, DFN-10 |
| 文件页数： | 9/20页 |
| 文件大小： | 457K |
| 代理商： | LT3502IDC |
LT3502/LT3502A
17
3502f
APPLICATIONS INFORMATION
High Temperature Considerations
The die temperature of the LT3502/LT3502A must be lower
than the maximum rating of 125°C. This is generally not
a concern unless the ambient temperature is above 85°C.
For higher temperatures, care should be taken in the layout
of the circuit to ensure good heat sinking of the LT3502/
LT3502A. The maximum load current should be derated as
the ambient temperature approaches 125°C. The die tem-
perature is calculated by multiplying the LT3502/LT3502A
power dissipation by the thermal resistance from junction
to ambient. Power dissipation within the LT3502/LT3502A
can be estimated by calculating the total power loss from
an efciency measurement and subtracting the catch diode
loss. The resulting temperature rise at full load is nearly
independent of input voltage. Thermal resistance depends
on the layout of the circuit board, but 102°C/W is typical
for the (2mm × 2mm) DFN package.
Outputs Greater Than 7V
Note that for outputs above 7V, the input voltage range
will be limited by the maximum rating of the BOOST pin.
The sum of input and output voltages cannot exceed the
BOOST pin’s 50V rating. The 15V circuit (Figure 12) shows
how to overcome this limitation using an additional zener
diode.
Other Linear Technology Publications
Application notes AN19, AN35 and AN44 contain more
detailed descriptions and design information for Buck
regulators and other switching regulators. The LT1376
data sheet has a more extensive discussion of output
ripple, loop compensation and stability testing. Design
Note 100 shows how to generate a bipolar output supply
using a buck regulator.
TYPICAL APPLICATIONS
0.8V Step-Down Converter
Figure 12. 15V Step-Down Converter
VIN
C3
0.1
μF
22pF
3502 F12
L1
33
μH
10V
SHDN
BOOST
SW
LT3502A
BD
GND
DA
FB
OFF ON
C1
10
μF
R2
10k
R1
180k
C2
1
μF
VIN
3.5V TO 40V
VOUT
15V
500mA
VIN
C3
0.1
μF
0.1
μF
3502TA02a
L1
3.3
μH
D1
SHDN
BOOST
SW
LT3502A
BD
GND
DA
FB
OFF ON
C1
47
μF
C2
1
μF
VIN
3V TO 40V
VBD
3V TO 7V
VOUT
0.8V
500mA
C1: JMK212BJ476MG
C3: HMK212BJ104MG
L1: LQH43CN3R3M03
VIN
C3
0.1
μF
C1: JMK316BJ107ML
L1: LQH43CN100K03
3502TA02b
L1
10
μH
D1
SHDN
BOOST
SW
LT3502
BD
GND
DA
FB
OFF ON
C1
100
μF
C2
1
μF
VIN
3V TO 40V
VBD
3V TO 7V
VOUT
0.8V
500mA
0.1
μF
相关PDF资料 |
PDF描述 |
|---|---|
| LT3502EDC | 1.1 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO10 |
| LT3506IDHD#TR | 3.6 A SWITCHING REGULATOR, 650 kHz SWITCHING FREQ-MAX, PDSO16 |
| LT3506IDHD | 3.6 A SWITCHING REGULATOR, 650 kHz SWITCHING FREQ-MAX, PDSO16 |
| LT3507AIUHF#TRPBF | SWITCHING REGULATOR, PQCC38 |
| LT3507AEFE#TRPBF | SWITCHING REGULATOR, PDSO38 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3502IDC#PBF | 制造商:Linear Technology 功能描述:Bulk |
| LT3502IDC#TRMPBF | 功能描述:IC REG BUCK ADJ 0.5A 8DFN 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 |
| LT3502IDC#TRPBF | 功能描述:IC REG BUCK ADJ 0.5A 8DFN 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:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 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:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LT3502IDC-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.1MHz/2.2MHz, 500mA Step-Down Regulators in 2mm × 2mm DFN and MS10 |
| LT3502IDCTRMPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Down 3-40V DFN8EP |
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