参数资料
| 型号： | ISL8121IRZ |
| 厂商： | Intersil |
| 文件页数： | 25/26页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 24-QFN |
| 标准包装： | 75 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 2MHz |
| 占空比： | 66% |
| 电源电压： | 4.9 V ~ 5.5 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： | 24-VFQFN 裸露焊盘 |
| 包装： | 管件 |
ISL8121
the peak-to-peak inductor current (I L,PP ) to the
maximum sustained load current, I O .
the tolerance multipliers corresponding to V REF , R S ,
and R P , respectively.
( k – 1 ) ? R STM + R PTM
k ? R PTM
Use a mix of input bypass capacitors to control the
input voltage ripple. Use ceramic capacitance for
the high frequency decoupling and bulk capacitors
to supply the RMS current. Minimize the connection
path inductance of the high frequency decoupling
REF TM ? ------------------------------------------------------------- – 1
TOL = ------------------------------------------------------------------------------------------------
100
[%]
(EQ. 35)
ceramic capacitors (from drain of upper MOSFET to
REF TM = 1.008
source of lower MOSFET).
For bulk capacitance, several electrolytic or high-
capacity MLC capacitors may be needed. For surface
mount designs, solid tantalum capacitors can be used,
but caution must be exercised with regard to the
capacitor surge current rating. These capacitors must
be capable of handling the surge-current at power-up.
APPLICATION SYSTEM DC TOLERANCE
2.8
R STM = 1.01
2.6 R PTM = 0.99
2.4
2.2
2.0
1.8
1.6
Although the ISL8121 features a tight voltage
reference, the overall system DC tolerance can be
affected by the tolerance of the other components
employed. The resistive divider used to set the output
voltage will directly influence the system DC voltage
1.4
1.2
1.0
0.8
R STM = 1.001
R PTM = 0.999
REF TM = 1.008
tolerance. Figure 29 details the absolute worst case
tolerance stack-up for 1% and 0.1% feedback
1
2
3
4
5 6
k = V OUT /V REF
7
8
9
10
resistors, and assuming the ISL8121 is regulating at
0.8% above its nominal reference. Other component
tolerance stack-ups may be investigated using the
following equation, where REF TM , R PTM , and R STM are
FIGURE 29. WORST CASE SYSTEM DC REGULATION
TOLERANCE (V REF AT 0.8% ABOVE
NOMINAL)
Intersil products are manufactured, assembled and tested utilizing ISO9000 quality systems as noted
in the quality certifications found at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications
at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by
Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any
infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any
patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
25
FN6352.2
October 27, 2009
相关PDF资料 |
PDF描述 |
|---|---|
| ISL8126IRZ | IC REG CTRLR BUCK PWM VM 32-QFN |
| ISL8130IAZ | IC REG CTRLR BST FLYBK VM 20QSOP |
| ISL85001IRZ-T | IC REG BUCK ADJ 1A 12DFN |
| ISL8500IRZ-T | IC REG BUCK ADJ 2A 12DFN |
| ISL8502AIRZ | IC REG BUCK SYNC ADJ 2A 24QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL8121IRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 24-QFN 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) |
| ISL8121IRZ-TR5453 | 制造商:Intersil Corporation 功能描述:STD. ISL8121IRZ-T WITH GOLD BOND WIRE ONLY - Tape and Reel |
| ISL8126 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Dual/n-Phase Buck PWM Controller with Integrated Drivers |
| ISL8126CRZ | 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN 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) |
| ISL8126CRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN 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) |
发布紧急采购，3分钟左右您将得到回复。