CP2103-GMR Silicon Laboratories Inc, CP2103-GMR Datasheet - Page 16

• Manufacturer Part Number: CP2103-GMR
• Description: IC CTRLR BRIDGE USB-UART 28MLP
• Manufacturer: Silicon Laboratories Inc

Specifications of CP2103-GMR

• Applications: USB
• Interface: USB
• Voltage - Supply: 3 V ~ 3.6 V
• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Mounting Type: Surface Mount
• For Use With: 336-1163 - KIT EVAL FOR CP2103 USB TO UART
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

CP2103
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 V
devices. See Table 11 for the voltage regulator electrical characteristics.
Alternatively, if 3 V power is supplied to the V
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 µF in parallel with 1.0 µF) be provided on the REGIN
Table 11. Voltage Regulator Electrical Specifications
–40 to +85 °C unless otherwise specified.
16
Input Voltage Range
Output Voltage
VBUS Detection Input Threshold
Bias Current
*Note: The maximum regulator supply current is 100 mA.
From VBUS
Power Net
input.
To 3 V
Parameter
Figure 7. Configuration 1: USB Bus-Powered
REGIN
VBUS
V
DD
CP2103
DD
Output Current = 1 to 100 mA*
pin, the CP2103 can function as a USB self-powered device with
Rev. 1.0
Conditions
5 V In
DD
Voltage Regulator (REG0)
pin and can be used to power external 3 V
VBUS Sense
3 V Out
Min
4.0
3.0
1.0
—
Typ
110
3.3
1.8
—
5.25
Max
Power Net
3.6
4.0
—
Device
Units
µA
V
V
V