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参数资料
| 型号： | ISL6232EVAL1 |
| 厂商： | Intersil |
| 文件页数： | 14/25页 |
| 文件大小： | 0K |
| 描述： | EVALUATION BOARD 1 ISL6232 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，LDO 步降 |
| 输出及类型： | 4，非隔离 |
| 输入电压： | 5.5 ~ 25 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： | ISL6232 |
ISL6232
BOOT5
UGATE5
PHASE5
VCC
LDO5
BOOT3
UGATE3
PHASE3
LGATE5
COMP5
CS5
5V SYNCH
PWM BUCK
CONTROLLER
CLK5
3.3V SYNCH
PWM BUCK
CONTROLLER
CLK3
LGATE3
COMP3
CS3
FB5
OUT5
DECODER
6pF
ENA5
PGOOD5
ENA3
PGOOD3
DECODER
6pF
FB3
OUT3
4.5V
3.0V
+
LDO5
5V LDO
3.3V LDO
LDO3
VIN
PGOOD
OSC
SHDN#
EN3
EN5
SHUTDOWN
STANDBY
POWER-UP
SQUENCE
REF
REF
FIGURE 30. FUNCTIONAL DIAGRAM
Each buck controller includes a feedback resistor divider
network, a multiplexer for programmable mode, a trans-
conductance error amplifier, a PWM comparator, high-side
gate and low-side gate drivers, and control logic circuit.
Figure 31 shows the synchronous buck PWM controller
block diagram.
The external loop compensator is used to optimize the
transient response with optimized external components. An
accurate current sensing resistor in series with output
inductor or the DC resistance of the inductor is used to
sense the output current for current ramp signal and
overcurrent protection. Moreover, it contains fault-protection
14
circuitry that can monitor the undervoltage and overvoltage
conditions of the OUT3 and OUT5 buck controller output
voltages. A power-on sequence is implemented to control
the power-up timing of OUT3 and OUT5. The power good
signal, PGOOD, is toggled to logic high once both OUT3 and
OUT5 reach 90% of the regulation points and soft start
period is finished.
The ISL6232 also includes 5V and 3.3V linear regulators, 2V
reference, and automatic switch-over circuits. All the blocks
inside ISL6232 are not directly powered by V IN voltage.
Instead, the VIN voltage is stepped down to 5V by the 5V
LDO5 regulator to supply both internal circuitry and the gate
FN9116.1
April 20, 2009
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6235 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Advanced Triple PWM Only Mode and Dual Linear Power Controller for Portable Applications |
| ISL6235CA | 制造商:Rochester Electronics LLC 功能描述:SYSTEM ELECTRONICS REGULATOR FOR LCD-PC - Bulk |
| ISL6235CA-T | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| ISL6236 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers |
| ISL6236A | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers |
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