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参数资料
| 型号： | IR3837MTR1PBF |
| 厂商： | International Rectifier |
| 文件页数： | 17/36页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 14A PQFN17 |
| 产品培训模块： | SupIRBuck? Family and POL Design Tools Overview |
| 标准包装： | 1 |
| 系列： | SupIRBuck™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 14.4 V |
| 输入电压： | 1.5 V ~ 16 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 225kHz ~ 1.65MHz |
| 电流 - 输出： | 14A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 17-VQFN |
| 包装： | 标准包装 |
| 供应商设备封装： | 17-PQFN（5x6） |
| 其它名称： | IR3837MTR1PBFDKR |
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IR3837MPbF
Therefore, in normal operating condition, after
Enable goes high the SS ramps up the output
voltage until Vfb (voltage of feedback/Fb pin)
reaches about 0.6V. Then Vref takes over and
the output voltage is regulated (refer to Fig. 11).
Tracking-mode operation is achieved by
connecting Vref to Vcc (1.5V<Vref<Vcc). Then,
while Vp=0, Enable is taken above its threshold
so that the soft start circuit generates internal SS
signal. After the internal SS signal reaches the
final value (refer to Fig. 4c) ramping up the Vp
input will ramp up the output voltage. In tracking
mode, Vfb always follows Vp which means Vout
is always proportional to Vp voltage (typical for
DDR/Vtt rail applications)
In sequencing mode of operation (simultaneous
or ratiometric), Vref is left floating and Vp is kept
to ground level until after SS signal reaches the
final value. Then Vp is ramped up and Vfb
follows Vp. When Vp>0.6V the error-amplifier
Tracking and sequencing operations can be
implemented to be simultaneous or ratiometric
(refer to figures 9 and 10). Figure 8 shows typical
circuit configuration for sequencing operation.
With this power-up configuration, the voltage at
the Vp pin of the slave reaches 0.6V before the
Fb pin of the master. If R E /R F =R C /R D ,
simultaneous startup is achieved. That is, the
output voltage of the slave follows that of the
master until the voltage at the Vp pin of the slave
reaches 0.6 V. After the voltage at the Vp pin of
the slave exceeds 0.6V, the internal 0.6V
reference of the slave dictates its output voltage.
In reality the regulation gradually shifts from Vp
to internal Vref. The circuit shown in Fig. 8 can
also be used for simultaneous or ratiometric
tracking operation if Vref of the slave is
connected to Vcc. Table 2 on page 18
summarizes the required conditions to achieve
simultaneous / ratiometric tracking or sequencing
operations.
switches to Vref and the output voltage is
regulated with Vref.
Fig. 9 Typical waveforms for sequencing mode
of operation: (a) simultaneous, (b) ratiometric
Fig. 8. Application Circuit for Simultaneous
and ratiometric Sequencing
Rev 1.31
Fig. 10 Typical waveforms in tracking mode of
operation: (a) simultaneous, (b) ratiometric
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3837MTR1PBF | 制造商:International Rectifier 功能描述:IC DC-DC CONV 1.5 MHz QFN-17 制造商:International Rectifier 功能描述:IC, DC-DC CONV, 1.5 MHz, QFN-17 |
| IR3837MTR1PBF-CUT TAPE | 制造商:IR 功能描述:IR3837 Series 1.5 MHz 14 A Surface Mount Synchronous Buck Regulator - QFN-16 |
| IR3837MTRPBF | 功能描述:直流/直流开关调节器 14A SupIRBuck Reg 250-1500kHz, 1.5-16V RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| IR3838MPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:HIGHLY INTEGRATED 10A SINGLE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR |
| IR3838MTR1PBF | 功能描述:直流/直流开关调节器 10A SupIRBuck Reg 250-1500kHz, 1.5-16V RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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