CP2101EK Silicon Laboratories Inc, CP2101EK Datasheet - Page 15

• Manufacturer Part Number: CP2101EK
• Description: KIT DEVELOPMENT RS232 TO USB
• Manufacturer: Silicon Laboratories Inc

Specifications of CP2101EK

• Processor To Be Evaluated: CP2101
• Interface Type: RS-232, USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 336-1076; CP2101EK; Q1572300

Table 9.1. Voltage Regulator Electrical Specifications
–40 to +85 °C unless otherwise specified.
9.
The CP2101 includes an on-chip 5-to-3 V voltage regulator. This allows the CP2101 to be configured as
either a USB bus-powered device or a USB self-powered device. These configurations are shown in
Figure 9.1 and Figure 9.2. When enabled, the 3 V voltage regulator output appears on the V
be used to power external 3V devices. See Table 9.1 for the voltage regulator electrical characteristics.
Alternatively, if 3 V power is supplied to the V
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 9.3.
The USB max power and power attributes descriptor must match the device power usage and configura-
tion. See application note “AN144: CP2101 Customization Guide” for information on how to customize USB
descriptors for the CP2101.
Note:
vided on the REGIN input.
Input Voltage Range
Output Voltage
VBUS Detection Input Threshold
Bias Current
*Note: The maximum regulator supply current is 100 mA.
It is recommended that additional decoupling capacitance (e.g., 0.1 µF in parallel with 1.0 µF) be pro-
Voltage Regulator
From VBUS
Power Net
Parameter
To 3 V
Figure 9.1. Configuration 1: USB Bus-Powered
REGIN
VBUS
V
DD
Output Current = 1 to 100 mA*
CP2101
DD
Conditions
Rev. 1.8
pin, the CP2101 can function as a USB self-powered
5 V In
Voltage Regulator (REG0)
VBUS Sense
3 V Out
Min
4.0
3.0
1.0
—
Typ
3.3
1.8
90
—
Power Net
Device
CP2101
DD
Max
5.25
TBD
3.6
4.0
pin and can
Units
µA
V
V
V
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