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IXD3235A12CMR-G 参数 Datasheet PDF下载

IXD3235A12CMR-G图片预览
型号: IXD3235A12CMR-G
PDF下载: 下载PDF文件 查看货源
内容描述: [IC REG BUCK 1.2V 0.6A SYNC SOT25]
分类和应用:
文件页数/大小: 27 页 / 2144 K
品牌: ZILOG [ ZILOG, INC. ]
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Product Specification  
IXD3235/36/37  
CE/MODE Pin Function  
The IXD3235/36/37 series enter the shut down mode, when a LOW logic-level signal applies to the CE/MODE pin.  
In the shutdown mode, IC current consumption is ~0 μA (Typical value), with the Lx and VOUT pins at high  
impedance state. The IC starts its operation when a HIGH logic-level signal applies to the CE/MODE pin.  
Intermediate voltage, generated by external resistive divider can be used to select PWM/PFM auto or PWM only  
switching modes in respect with the table below.  
OPERATION MODE  
CE/MODE VOLTAGE LEVEL  
IXD3235  
IXD3236  
IXD3537  
Synchronous PWM/PFM auto  
switching mode  
0.65 V ≤ V CE/MODE ≤ 6.0 V  
Synchronous Fixed PWM mode  
-
Synchronous PWM/PFM auto  
switching mode  
VIN 0.25 V ≤ V CE/MODE VIN  
-
-
0.65 V ≤ V CE/MODE ≤ VIN 1.0 V  
-
-
Synchronous Fixed PWM mode  
Standby mode  
0 V ≤ V CE/MODE ≤ 0.25 V  
Standby mode  
Standby mode  
Examples of CE/MODE pin use are shown below. Please set the value of each resistor from few hundreds kΩ to  
few hundred MΩ. For switches, CPU open-drain I/O port and transistor can be used.  
The CE/MODE pin is a CMOS input with a sink current ~ 0 μA.  
IXD3235/36 series - Examples of how to use CE/MODE pin  
IC STATUS  
SW-CE  
POSITION  
ON  
SCHEMATIC A  
SCHEMATIC B  
Active  
Standby  
Active  
OFF  
Standby  
IXD3237 series - Examples of how to use CE/MODE pin  
IC STATUS  
SW-CE  
POSITION  
SW-PWM/PFM  
POSITION  
SCHEMATIC A  
SCHEMATIC B  
PWM/PFM Auto  
Switching Mode  
PWM Mode  
ON  
X
Standby  
OFF  
OFF  
ON  
OFF  
PWM Mode  
PWM/PFM Auto  
Switching Mode  
Standby  
Soft Start  
Soft start time is available in two options via product  
selection.  
The soft-start time of IXD3235/36/37 series is optimized by  
using internal circuits and it is 1.0 ms (Typically.) for  
A/C/D/E series and 0.25 ms for B/F/G series. D and F  
series require external resistors and a capacitor to set the  
output voltage, so the soft-start time might vary based on  
value of those external components. The definition of the  
soft-start time is the time when the output voltage goes up  
to the 90% of nominal output voltage after the IC is enabled  
by CE ”H” signal.  
PS034201-0515  
PRELIMINARY  
12