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参数资料
| 型号： | ISL6526EVAL2 |
| 厂商： | Intersil |
| 文件页数： | 4/8页 |
| 文件大小： | 0K |
| 描述： | EVALUATION BOARD QFN ISL6526 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 2.5V |
| 电流 - 输出： | 5A |
| 输入电压： | 3.3 ~ 5 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 300kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ISL6526 |
AN1021
τ = ----------------------------------------------- = ( R D || R FB ) ? C D
V REF
A properly designed droop implementation will have the time
constant of the RC filter equal to or very close to the time
constant of the output inductor.
L
out
DCR + R parasitic
Note that the impedance portion of the time constant
calculation for the RC filter includes the parallel combination
of the filter resistor, R D , and the feedback resistor, R FB .
Since the regulation point is now located at the phase node,
and a resistor, R D , is being added to the DC path for
regulation, then the offset resistor, R OS , must be adjusted.
? ?
1
R OS = ? ---------------------------------------------------------------------------------------------------------- ? ? ( R FB + R D )
---
? V NOMINAL + 2 ? I O ( max ) ? DCR – V REF ?
Where: V REF = 0.8V for ISL6526
Efficiency
The ISL6526 and ISL6527 regulators allow for highly
efficient systems. The efficiency of the evaluation board in is
shown in Figure 10. The efficiencies of the converter for both
sinking and sourcing current are identical.
95
94
93
92
91
90
V REF = External Reference for ISL6527
0
1
2
3
4
5
Load Current (A)
Figure 9 shows the output voltage of the converter with the
droop circuitry added.
V MAX
FIGURE 10. EFFICIENCY - SINKING AND SOURCING
CURRENT
Conclusion
V NOMINAL
V MIN
OUTPUT
VOLTAGE
WITHOUT DROOP
WITH DROOP
The ISL6526 and ISL6527 are versatile PWM controllers.
Compact and highly efficient regulators can be implemented
with either IC. Both ICs offer small footprints and features
which make them an ideal for many low voltage power
solutions.
References
0A
OUTPUT CURRENT
I O(max)
For Intersil documents available on the web, see
http://www.intersil.com/
FIGURE 9. OUTPUT VOLTAGE DROOP
[1] ISL6526 Data Sheet, Intersil Corporation, File No.
With the proper selection of the components used in the RC
filter across the inductor, the frequency response of the
system is only minimally affected and the compensation
network does not need to be recalculated.
4
FN9055
[2] ISL6527 Data Sheet, Intersil Corporation, File No.
FN9056
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6526IB | 功能描述:IC REG CTRLR BUCK PWM VM 14-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| ISL6526IB-T | 功能描述:IC REG CTRLR BUCK PWM VM 14-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| ISL6526IB-TR5146 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ISL6526IBZ | 功能描述:IC REG CTRLR BUCK PWM VM 14-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL6526IBZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 14-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
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