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| 型号： | IR3840AMTR1PBF |
| 厂商： | International Rectifier |
| 文件页数： | 15/34页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 14A 15QFN |
| 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： | 0.7 V ~ 14.4 V |
| 输入电压： | 1.5 V ~ 16 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 225kHz ~ 1MHz |
| 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： | 15-PowerVQFN |
| 包装： | 标准包装 |
| 供应商设备封装： | PQFN（5x6） |
| 其它名称： | IR3840AMTR1PBFDKR |
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PD-97505
IR3840AMPbF
Thermal Shutdown
Temperature sensing is provided inside
IR3840A. The trip threshold is typically set to
140 o C. When trip threshold is exceeded, thermal
shutdown turns off both MOSFETs and
discharges the soft start capacitor.
Automatic restart is initiated when the sensed
temperature drops within the operating range.
There is a 20 o C hysteresis in the thermal
shutdown threshold.
Output Voltage Sequencing
The IR3840A can accommodate user
programmable sequencing options using Seq,
1.5V <Vin<16V
4.5V <Vcc<5.5V
Enable and Power Good pins.
Enable
Vin
Boot
Vo(master)
Vcc
SW
Vo(slave)
PGood
Vo1
RE
PGood
OCSet
RC
Seq
Fb
Vo2
RF
Rt
RD
SS/ SD
Gnd
PGnd
Comp
Simultaneous Powerup
Fig. 8b. Application Circuit for Simultaneous
Fig. 8a. Simultaneous Power-up of the slave
Sequencing
with respect to the master.
Power Good Output
Through these pins, voltage sequencing such as
simultaneous and sequential can be
implemented. Figure 8. shows simultaneous
sequencing configurations. In simultaneous
power-up, the voltage at the Seq pin of the slave
reaches 0.7V before the Fb pin of the master. For
R E /R F =R C /R D , therefore, the output voltage of
the slave follows that of the master until the
voltage at the Seq pin of the slave reaches 0.7 V.
After the voltage at the Seq pin of the slave
exceeds 0.85V, the internal 0.7V reference of
the slave dictates its output voltage.
Rev 11.0
The IC continually monitors the output voltage via
Feedback (Fb pin). The feedback voltage forms
an input to a window comparator whose upper
and lower thresholds are 0.805V and 0.595V
respectively. Hence, the Power Good signal is
flagged when the Fb pin voltage is within the
PGood window, i. e. between 0.595V to 0.805V,
as shown in Fig .9. The PGood pin is open drain
and it needs to be externally pulled high. High
state indicates that output is in regulation. Fig. 9a
shows the PGood timing diagram for non-
tracking operation. In this case, during startup,
PGood goes high after the SS voltage reaches
2.1V if the Fb voltage is within the PGood
comparator window. Fig. 9a. and Fig 9.b. also
show a 256 cycle delay between the Fb voltage
entering within the thresholds defined by the
PGood window and PGood going high.
15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3840AMTRPBF | 功能描述:直流/直流开关调节器 14A SupIRBuck Reg 250-1000kHz, 1.5-21V 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 |
| IR3840MPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:HIGHLY EFFICIENT INTEGRATED 12A SYNCHRONOUS BUCK REGULATOR |
| IR3840MTR1PBF | 功能描述:直流/直流开关调节器 12A 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 |
| IR3840MTR1PBF | 制造商:International Rectifier 功能描述:IC DC/DC SUPIRBUCK 12A 15QFN |
| IR3840MTRPBF | 功能描述:直流/直流开关调节器 12A 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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