参数资料
| 型号： | ISL9109IRZ-T |
| 厂商： | Intersil |
| 文件页数： | 12/13页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 1.5A 8DFN |
| 标准包装： | 6,000 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 5.5 V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.6MHz |
| 电流 - 输出： | 1.5A |
| 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： | 8-VFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-DFN（2x3） |
ISL9109
Layout Recommendation
The PCB layout is a very important converter design step to
make sure the designed converter works well, especially
under the high current high switching frequency condition.
For ISL9109, the power loop is composed of the output
The heat of the IC is mainly dissipated through the thermal
pad. Maximizing the copper area connected to the thermal
pad is preferable. In addition, a solid ground plane is helpful
for EMI performance.
TABLE 1. ISL9109 CIRCUIT CONFIGURATION vs V OUT
inductor L, the output capacitor C OUT , the SW pin and the
GND pin. It is necessary to make the power loop as small as
possible and the connecting traces among them should be
direct, short and wide; the same type of traces should be
used to connect the VIN pin, the input capacitor C IN and its
ground. The switching node of the converter, the SW pin,
and the traces connected to this node are very noisy, so
keep the voltage feedback trace and other noise sensitive
traces away from these noisy traces.
The input capacitor should be placed as close as possible to
the VIN pin. The ground of the input and output capacitors
should be connected as close as possible as well.
VOUT
(V)
0.8
1.0
1.2
1.5
1.8
2.5
2.8
3.3
L
( μ H)
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
C2
( μ F)
10
10
10
10
10
10
10
10
R1
(k Ω )
0
44.2
80.6
84.5
100
100
100
102
C3
(pF)
N/A
120
120
100
100
100
100
100
R2
(k Ω )
100
178
162
97.6
80.6
47.5
40.2
32.4
12
FN6681.1
September 29, 2008
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