参数资料
型号: ISL8016IR18Z-T
厂商: Intersil
文件页数: 20/22页
文件大小: 0K
描述: IC REG BUCK SYNC 1.8V 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: 固定
输出数: 1
输出电压: 1.8V
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:
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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ISL8016IR18Z-T7A 功能描述:IC REG BUCK SYNC 1.8V 6A 20QFN 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:1 系列:EZBuck™ 类型:降压(降压) 输出类型:可调式 输出数:1 输出电压:0.8 V ~ 22.1 V 输入电压:3 V ~ 26 V PWM 型:电流模式 频率 - 开关:1.5MHz 电流 - 输出:1.8A 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-WFDFN 裸露焊盘 包装:剪切带 (CT) 供应商设备封装:8-DFN(2x2) 其它名称:785-1276-1
ISL8016IR25Z 功能描述:IC REG BUCK SYNC 2.5V 6A 20QFN 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:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:降压(降压) 输出类型:两者兼有 输出数:1 输出电压:5V,1 V ~ 10 V 输入电压:3.5 V ~ 28 V PWM 型:电流模式 频率 - 开关:220kHz ~ 1MHz 电流 - 输出:600mA 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:16-SSOP(0.154",3.90mm 宽) 包装:带卷 (TR) 供应商设备封装:16-QSOP
ISL8016IR25Z-T 功能描述:IC REG BUCK SYNC 2.5V 6A 20QFN 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:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:降压(降压) 输出类型:两者兼有 输出数:1 输出电压:5V,1 V ~ 10 V 输入电压:3.5 V ~ 28 V PWM 型:电流模式 频率 - 开关:220kHz ~ 1MHz 电流 - 输出:600mA 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:16-SSOP(0.154",3.90mm 宽) 包装:带卷 (TR) 供应商设备封装:16-QSOP
ISL8016IR25Z-T7A 功能描述:IC REG BUCK SYNC 2.5V 6A 20QFN 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:1 系列:EZBuck™ 类型:降压(降压) 输出类型:可调式 输出数:1 输出电压:0.8 V ~ 22.1 V 输入电压:3 V ~ 26 V PWM 型:电流模式 频率 - 开关:1.5MHz 电流 - 输出:1.8A 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-WFDFN 裸露焊盘 包装:剪切带 (CT) 供应商设备封装:8-DFN(2x2) 其它名称:785-1276-1
ISL8016IR33Z 功能描述:IC REG BUCK SYNC 3.3V 6A 20QFN 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:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:降压(降压) 输出类型:两者兼有 输出数:1 输出电压:5V,1 V ~ 10 V 输入电压:3.5 V ~ 28 V PWM 型:电流模式 频率 - 开关:220kHz ~ 1MHz 电流 - 输出:600mA 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:16-SSOP(0.154",3.90mm 宽) 包装:带卷 (TR) 供应商设备封装:16-QSOP