Specifications

CY7C67200
Document Number: 38-08014 Rev. *J Page 7 of 93
Component details:
■ D1 and D2: Schottky diodes with a current rating greater than
60 mA.
■ C1: Ceramic capacitor with a capacitance of 0.1 µF.
■ C2: Capacitor value must be no more that 6.5 µF since that is
the maximum capacitance allowed by the USB OTG specifi-
cation for a dual-role device. The minimum value of C2 is 1 µF.
There are no restrictions on the type of capacitor for C2.
If the VBUS charge pump circuit is not to be used, CSWITCHA,
CSWITCHB, and OTGVBUS can be left unconnected.
Charge Pump Features
■ Meets OTG Supplement Requirements, see Table 41, “DC
Characteristics: Charge Pump,” on page 70.
Charge Pump Pins
Booster Interface
EZ-OTG has an on-chip power booster circuit for use with power
supplies that range between 2.7 V and 3.6 V. The booster circuit
boosts the power to 3.3 V nominal to supply power for the entire
chip. The booster circuit requires an external inductor, diode, and
capacitor. During power down mode, the circuit is disabled to
save power. Figure 2 shows how to connect the booster circuit.
Component details:
■ L1: Inductor with inductance of 10 µH and a current rating of at
least 250 mA
■ D1: Schottky diode with a current rating of at least 250 mA
■ C1: Tantalum or ceramic capacitor with a capacitance of at least
2.2 µF
Figure 3 shows how to connect the power supply when the
booster circuit is not being used.
Booster Pins
Table 11. Charge Pump Interface Pins
Pin Name Pin Number
OTGVBUS C1
CSwitchA D1
CSwitchB D2
Figure 2. Power Supply Connection With Booster
BOOSTVcc
VSWITCH
VCC
AVCC
C1
D1
L1
3.3V
2.7V to 3.6V
Power Supply
Figure 3. Power Supply Connection Without Booster
Table 12. Charge Pump Interface Pins
Pin Name Pin Number
BOOSTVcc F1
VSWITCH E2
BOOSTVcc
VSWITCH
VCC
AVCC
3.0V to 3.6V
Power Supply