USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors

Active: In Production.

The MAX3353E I²C-compatible USB On-the-Go (OTG) regulated charge pump with switchable pullup/pulldown resistors allows peripherals and mobile devices such as PDAs, cellular phones, and digital cameras to be interconnected without a host PC.

The MAX3353E enables a system with an integrated USB dual-role transceiver to function as a USB OTG dual-role device. The charge pump in the MAX3353E supplies V_BUS power and signaling that is required by the transceiver as defined in On-the-Go Supplement: USB 2.0, Revision 1.0. The MAX3353E provides the switchable pullup and pulldown resistors on D+ and D-required for a dual-role device.

The MAX3353E integrates a regulated charge pump, switchable pullup/pulldown resistors, and an I²C-compatible 2-wire serial interface. The device provides a detector to monitor ID status and operates with logic supply voltages (V_L) between +1.65V and V_CC and charge-pump supply voltages (V_CC) from +2.6V to +5.5V. The charge pump supplies an OTG-compatible output on V_BUS while sourcing 8mA output current.

The MAX3353E enables USB OTG communication between digital logic parts that cannot supply or tolerate the +5V V_BUS levels that USB OTG requires. By controlling and measuring V_BUS using internal comparators, this device supports USB OTG session request protocol (SRP) and host negotiation protocol (HNP).

The MAX3353E has built-in ±15kV ESD protection circuitry to guard V_BUS, ID_IN, D+, and D-. The MAX3353E is available in a 5 x 4 chip-scale package (UCSP™) and 16-pin TSSOP package.

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