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| 型号： | ISL8016IRAJZ-T |
| 厂商： | Intersil |
| 文件页数： | 20/22页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 6A 20QFN |
| 产品培训模块： | Solutions for Industrial Control Applications |
| 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： | 0.6 V ~ 5.5 V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 525kHz ~ 3.9MHz |
| 电流 - 输出： | 6A |
| 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： | 20-VFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 20-QFN（3x4） |
ISL8016
(EQ. 17)
C 6 = ----------------- , C 7 = -------------------------
where GM is the sum of the trans-conductance, g m , of the
voltage error amplifier in each phase. Compensator capacitor C 6
is then given by:
1 1
R 6 ω cz 2 π R 6 f esr
Example: V IN = 5V, V o = 2.5V, I o = 6A, fs = 1MHz, C o = 44μF/3m ? ,
L = 1μH, GM = 100μs, R t = 0.25V/A, V FB = 0.6V, S e = 0.15V/μs,
S n = 2.55 × 10 5 V/s, f c = 100kHz, then compensator resistance
R 6 = 120k ? .
Put the compensator zero at 1.5kHz (~1.5x C o R o) , and put the
compensator pole at ESR zero which is 390kHz. The
compensator capacitors are:
C 6 = 220pF, C 7 = 3pF (there is approximately 3pF parasitic
capacitance from V COMP to GND; therefore, C 7 optional).
Figure 42 shows the simulated loop gain response. It is shown
that it has 95kHz loop bandwidth with 79° phase margin and at
least 10dB gain margin.
60
45
PCB Layout Recommendation
The PCB layout is a very important converter design step to make
sure the designed converter works well. For ISL8016, the power
loop is composed of the output inductor L’s, the output capacitor
C OUT , the PHASE’s pins, and the PGND 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
switching node of the converter, the PHASE pins, and the traces
connected to the node are very noisy, so keep the voltage
feedback trace away from these noisy traces. The input capacitor
should be placed as close as possible to the VIN pin , and the
ground of the input and output capacitors should be connected
as close as possible. 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 better EMI performance. It is recommended to add
at least 5 vias ground connection within the pad for the best
thermal relief.
30
15
0
-15
GAIN LOOP (dB)
-30
100
1k
10k
100k
1M
180
150
120
PHASE LOOP (°)
90
60
30
0
100
1k
10k
100k
1M
FIGURE 42. SIMULATED LOOP GAIN
20
FN7616.1
May 5, 2011
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL8016IRAJZ-T7A | 功能描述:直流/直流开关转换器 6A ADJ VOUT LW QUIES CENT CUR SYNC BUCK RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| ISL8022 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Dual 2A/1.7A Low Quiescent Current 2.25MHz High Efficiency Synchronous |
| ISL8022EVAL1Z | 功能描述:EVAL BOARD 1 FOR ISL8022 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL8022EVAL2Z | 功能描述:EVAL BOARD 2 FOR ISL8023 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL8022IRZ | 功能描述:直流/直流开关调节器 DL CH 2 25MHZ 2 0 A & 1 7ASYNCHG 4X3 1 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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