GENERAL DEscriptION

The SGM6609 is a high-current, synchronous boost DC/DC converter with a programmable peak current limit. The peak current limit is programmed from 0.5A to 3.5A by an external resistor from ISET pin to ground. The device also uses an external resistive divider to set the output voltage from 3V to 5V.

This device has the input current protection to avoid overload of system power. When applying a large load pulse, it uses a selectable large capacitor to ensure that the output voltage meets the load power re At light loads, the light load switching frequency modulation and low IQ help the device maintain high efficiency. It also has the features like synchronous boost rectification and internal compensation. And the internal compensation offers a fast transient response with no external components.

This device also integrates a reverse current blocking to avoid current flowing back to the input. In shutdown mode, the input and output are isolated by the true load disconnection function. The device also includes over-temperature protection, short-circuit protection and programmable over-voltage protection.

The SGM6609 is available in a Green TDFN-3×3-12L package and is rated over the -40℃ to +85℃ temperature range.

FEATURES

• 2.4V to 5V Input Voltage Range

• 3V to 5V Adjustable Output Voltage

• 0.5A to 3.5A Programmable N-MOSFET Peak Current Limit

• Up to 95%Efficiency

• 1.2MHz Switching Frequency

• Synchronous Boost Rectification and Internal Compensation

• Reverse Current Blocking

• True Load Disconnection in Shutdown

• Power-Good Indication

• Programmable Over-Voltage Protection

• Over-Temperature and Short-Circuit Protection

• Available in a Green TDFN-3×3-12L Package

• -40℃ to +85℃ Operating Temperature Range

APPLICATIONS

Industry and USB Modems

PC (PCMCIA) Modems Cards

PCI-E Modem Cards

WCDMA/Edge/GPRS/TD-SCDMA

CDMA/Evdo-A/Evdo-B