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参数资料
| 型号： | IR3503MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 23/39页 |
| 文件大小： | 0K |
| 描述： | IC CTRL XPHASE VR11.0/1 32-MLPQ |
| 标准包装： | 1 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 8mA |
| 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： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-MLPQ（5x5） |
| 包装： | 标准包装 |
| 其它名称： | IR3503MTRPBFDKR |
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IR3503
output low and inhibiting switching in the phase ICs and de-asserting the VRRDY signal. The output current is not
controlled during the delay time. The SS/DEL capacitor will discharge until it reaches 200 mV and the fault latch is
reset allowing a normal soft .
ENABLE
INTERNAL
OC DELAY
4.0V
3.92V
3.88V
SS/DEL
EA
VOUT
VRRDY
OCP THRESHOLD
IOUT
1.1V
START-UP WITH
OUTPUT SHORTED
HICCUP OVER-CURRENT
PROTECTION (OUTPUT
SHORTED)
NORMAL
START-UP
OCP
DELAY
OVER-CURRENT
PROTECTION
(OUTPUT SHORTED)
NORMAL NORMAL
START-UP OPERATION POWER-DOWN
NORMAL
(OUTPUT
OPERATION SHORTED)
Figure 14: Constant over-current protection during and after soft-start
VCCL Under Voltage Lockout (UVLO)
The IR3503 has no under voltage lockout for converter input voltage (VCC), but monitors the VCCL voltage instead,
which is used for the gate drivers of phase ICs and circuits in control IC and phase ICs. During power up, the fault
latch will be reset if VCCL is above 4.2 V. If VCCL voltage drops below 3.8 V, the fault latch will be set.
Over Voltage Protection (OVP)
Output over-voltage happens during normal operation if a high side MOSFET short occurs or if output voltage is out of
regulation. The over-voltage protection comparator monitors VO pin voltage. If VO pin voltage exceeds VDAC by
130mV after SS, as shown in Figure 15, IR3503 raises ROSC/OVP pin voltage above to V (VCCL) - 1V, which sends
over voltage signal to system. The ROSC/OVP pin can also be connected to a thyristor in a crowbar circuit, which
pulls the converter input low in over voltage conditions. The over voltage condition also sets the over voltage fault
latch, which pulls error amplifier output low to turn off the converter output. At the same time IIN pin (IIN of phase ICs)
is pulled up to VCCL to communicate the over voltage condition to phase ICs, as shown in Figure 15. In each phase
IC, the OVP circuit overrides the normal PWM operation and will fully turn-on the low side MOSFET within
approximately 150ns. The low side MOSFET will remain on until IIN pin voltage drops below V(VCCL) - 800mV, which
signals the end of over voltage condition. An over voltage fault condition is latched in the IR3503 and can only be
cleared by recycling VCCL or ENABLE.
Page 23 of 39
February 12, 2010
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3504MPBF | 制造商:International Rectifier 功能描述:Control IC 32-Pin MLPQ Strip |
| IR3504MTRPBF | 功能描述:开关变换器、稳压器与控制器 X-PHASE IR3504 AMD SVID CTRL IC 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 |
| IR3505 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM PHASE IC |
| IR3505MPBF | 功能描述:IC XPHASE3 CONTROL 16-MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:XPhase3™ 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件 |
| IR3505MTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE3 DDR VTT 7V 2A 3 Wire 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 |
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