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参数资料
| 型号： | ISL9104IRUWEVAL1Z |
| 厂商： | Intersil |
| 文件页数： | 9/14页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD 1 FOR ISL9104IRUW |
| 标准包装： | 1 |
| 系列： | * |
ISL9104, ISL9104A
Block Diagram
T
T
SHUTDOWN
SOF
SOFT-
STAR
START
OSCILLATOR
SHUTDOWN
VIN
EN
BANDGAP
VREF
EAMP
+
PWM/PFM
COMP
LOGIC
CONTROLLER
SLOPE
PROTECTION
DRIVER
SW
COMP
X
GND
FB
*NOTE
BLEEDING
FET
100 Ω
+
SCP
OCP
+
VREF1
CSA
VREF3
+
+
SKIP
VREF2
ZERO-CROSS
SENSING
*NOTE: FOR FIXED OUTPUT OPTIONS ONLY
NOTE: For Adjustable output version, the internal feedback resistor divider is disabled and the FB pin is directly connected
to the error amplifier.
FIGURE 23. FUNCTIONAL BLOCK DIAGRAM
Theory of Operation
The ISL9104, ISL9104A is a step-down switching regulator
optimized for battery-powered handheld applications. The
regulator operates at typical 4.3MHz fixed switching frequency
under heavy load condition to allow small external inductor and
capacitors to be used for minimal printed-circuit board (PCB)
area. At light load, the regulator can automatically enter the skip
mode (PFM mode) to reduce the switching frequency to minimize
the switching loss and to maximize the battery life. The quiescent
current under skip mode under no load and no switch condition
is typically only 20μA. The supply current is typically only 0.05μA
when the regulator is disabled.
9
PWM Control Scheme
The ISL9104, ISL9104A uses the peak-current-mode pulse-width
modulation (PWM) control scheme for fast transient response
and pulse-by-pulse current limiting. Figure 23 shows the circuit
functional block diagram. The current loop consists of the
oscillator, the PWM comparator COMP, current sensing circuit,
and the slope compensation for the current loop stability. The
current sensing circuit consists of the resistance of the P-Channel
MOSFET when it is turned on and the Current Sense Amplifier
(CSA). The control reference for the current loops comes from the
Error Amplifier (EAMP) of the voltage loop.
FN6829.5
September 21, 2011
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL9104IRUWZ-T | 功能描述:IC REG BUCK SYNC 1.2V 0.5A 6TDFN 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:50 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:5 V ~ 25 V 输入电压:2.3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:600kHz，1.2MHz 电流 - 输出:1A 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-TSSOP，8-MSOP（0.118"，3.00mm 宽） 包装:管件 供应商设备封装:8-MSOP |
| ISL9104IRUWZ-T7A | 功能描述:IC REG BUCK SYNC 1.2V 0.5A 6TDFN 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:50 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:5 V ~ 25 V 输入电压:2.3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:600kHz，1.2MHz 电流 - 输出:1A 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-TSSOP，8-MSOP（0.118"，3.00mm 宽） 包装:管件 供应商设备封装:8-MSOP |
| ISL9105 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:600mA Low Quiescent Current 1.6MHz High Efficiency Synchronous Buck Regulator |
| ISL9105EVAL1Z | 功能描述:电源管理IC开发工具 ISL9105 EVALUATION BOARD 1 - RoHS COMPLIANT - DFN RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| ISL9105IRZ | 制造商:Intersil Corporation 功能描述:- Bulk |
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