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参数资料
| 型号： | LTC3203EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 14/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BST SWITCHD CAP ADJ 10DFN |
| 标准包装： | 2,500 |
| 类型： | 升压（升压），切换电容（充电泵） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调 |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | Burst Mode? |
| 频率 - 开关： | 900kHz，1MHz |
| 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： | 10-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-DFN（3x3） |
LTC3203/LTC3203-1
LTC3203B/LTC3203B-1
APPLICATIO S I FOR ATIO
Thermal Management
For higher input voltages and maximum output current,
there can be substantial power dissipation in the LTC3203/
LTC3203-1/LTC3203B/LTC3203B-1. If the junction tem-
perature increases above approximately 150 ° C, the ther-
mal shutdown circuitry will automatically deactivate the
output. To reduce the maximum junction temperature, a
good thermal connection to the PC board is recommended.
Connecting GND (Pin 9) and the exposed pad (Pin 11) of
the DFN package to a ground plane under the device on two
layers of the PC board can reduce the thermal resistance
if the flying capacitors are not close to the part (i.e. the loop
area is large). To decouple capacitive energy transfer, a
Faraday shield may be used. This is a grounded PC trace
between the sensitive node and the LTC3203/LTC3203-1/
LTC3203B/LTC3203B-1 pins. For a high quality AC ground
it should be returned to a solid ground plane that extends
all the way to the LTC3203/LTC3203-1/LTC3203B/
LTC3203B-1. To prevent degraded performance, the FB
trace should be kept away or be shielded from the flying
capacitor traces.
GROUND PLANE
of the package and PC board considerably.
C1
Layout Considerations
Due to the high switching frequency and high transient
C OUT
C2
currents produced by the LTC3203/LTC3203-1/
LTC3203B/LTC3203B-1, careful board layout is neces-
sary for optimum performance. A true ground plane and
short connections to all the external capacitors will
1
2
3
4
5
11
10
9
8
7
6
improve performance and ensure proper regulation
under all conditions.
The flying capacitor pins C1 + , C2 + , C1 – and C2 – will have
very high edge rate waveforms. The large dV/dt on these
pins can couple energy capacitively to adjacent printed
circuit board runs. Magnetic fields can also be generated
LTC3203/LTC3203B COMPONENTS NOT USED
IN LTC3203-1 OR LTC3203B-1
C IN
3206 F07
Figure 6. Recommended Layouts
32031fa
14
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