參數(shù)資料
型號: CP2103-GMR
廠商: Silicon Laboratories Inc
文件頁數(shù): 8/20頁
文件大?。?/td> 0K
描述: IC CTRLR BRIDGE USB-UART 28MLP
產(chǎn)品培訓模塊: CP21xx USB Bridge
標準包裝: 1,500
應(yīng)用: USB
接口: USB
電源電壓: 3 V ~ 3.6 V
封裝/外殼: 28-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 28-QFN(5x5)
包裝: 帶卷 (TR)
安裝類型: 表面貼裝
配用: 336-1163-ND - KIT EVAL FOR CP2103 USB TO UART
CP2103
16
Rev. 1.0
9. Voltage Regulator
The CP2103 includes an on-chip 5 to 3 V voltage regulator. This allows the CP2103 to be configured as either a
USB bus-powered device or a USB self-powered device. These configurations are shown in Figures 7 and 8.
When enabled, the 3 V voltage regulator output appears on the VDD pin and can be used to power external 3 V
devices. See Table 11 for the voltage regulator electrical characteristics.
Alternatively, if 3 V power is supplied to the VDD pin, the CP2103 can function as a USB self-powered device with
the voltage regulator disabled. For this configuration, it is recommended that the REGIN input be tied to the 3 V net
to disable the voltage regulator. This configuration is shown in Figure 9.
The USB max power and power attributes descriptor must match the device power usage and configuration. See
“AN144: CP21xx Device Customization Guide” for information on how to customize USB descriptors for the
CP2103.
Note: It is recommended that additional decoupling capacitance (e.g., 0.1 F in parallel with 1.0 F) be provided on the REGIN
input.
Figure 7. Configuration 1: USB Bus-Powered
Table 11. Voltage Regulator Electrical Specifications
–40 to +85 °C unless otherwise specified.
Parameter
Conditions
Min
Typ
Max
Units
Input Voltage Range
4.0
5.25
V
Output Voltage
Output Current = 1 to 100 mA*
3.0
3.3
3.6
V
VBUS Detection Input Threshold
1.0
1.8
4.0
V
Bias Current
110
A
*Note: The maximum regulator supply current is 100 mA.
Voltage Regulator (REG0)
5 V In
3 V Out
VBUS Sense
REGIN
VBUS
From VBUS
To 3 V
Power Net
Device
Power Net
VDD
CP2103
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