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参数资料
| 型号： | IR3523MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 15/37页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE3 CTLR VR11.1 40-MLPQ |
| 标准包装： | 3,000 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 10mA |
| 电源电压： | 4.75 V ~ 7.5 V |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-MLPQ |
| 供应商设备封装： | 40-MLPQ（6x6） |
| 包装： | 带卷 (TR) |
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IR3523
IR3523 THEORY OF OPERATION
Block Diagram
The Block diagram of the IR3523 is shown in Figure 3, and specific features are discussed in the following sections.
All the features are described using one output but suitable for both unless otherwise specified.
VIDx Control
The IR3523 converter outputs are independently controlled by two three-bit input interfaces (see Table 1-2): VDAC1
(VOUT1) and VDAC2 (VOUT2). The VID codes are stored and then inputted to the Digital-to-Analog Converter
(DAC) whose output is sent to the VDAC buffer amplifier. The output of the buffer amplifier is the VDAC pin.
VDAC1 will initially boot to 1.1V when Vout1 is enabled then will transition to the stored VID1 value once SS/DEL1
reached 3.0 V. The VDAC voltage, input offsets of error amplifier and remote sense differential amplifier, are post-
package trimmed to provide 0.5% system set-point accuracy. The actual VDAC voltage does not determine the
system accuracy, which has a wider tolerance. The VID pins, VID2_x and VID1_x, require an external bias voltage
and should not be floated.
The IR3523 can accept changes in the VID code while operating and vary DAC voltage accordingly. The
sink/source capability of the VDAC buffer amplifier is programmed by the same external resistor that sets the
oscillator frequency. The slew rate of the voltage at the VDAC pins can be adjusted by the external capacitors
between VDAC pins and LGND pin. A resistor connected in series with this capacitor is required to compensate the
VDAC buffer amplifiers. The stepped VID transition results in a smooth analog transition of the VDAC voltage and
converter output voltage. This analog transition minimizes inrush currents in the input (and output) capacitors and
reduces overshoot of the output voltage.
VID1_4
0
0
0
0
1
1
1
1
VID1_3
0
0
1
1
0
0
1
1
VID1_2
0
1
0
1
0
1
0
1
VDAC1
1.200
1.175
1.150
1.125
1.100
1.075
1.050
1.025
Table 1: Output (1) 3-bit VID table
VID2_2
0
0
0
0
1
1
1
1
VID2_1
0
0
1
1
0
0
1
1
VID2_0
0
1
0
1
0
1
0
1
VDAC2
1.350
1.400
1.450
1.500
1.550
1.600
1.650
1.800
Table 2: Output (2) 3-bit VID table
Page 15 of 37
June 20, 2008
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相关代理商/技术参数 |
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|---|---|
| IR3527 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DUAL PHASE IC |
| IR3527MPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DUAL PHASE IC |
| IR3527MTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE3 Dual Phase 7V 1.3A PMIC RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| IR3529 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM PHASE IC |
| IR3529MPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM PHASE IC |
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