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The TPS6220x devices are a family of high-efficiency synchronous step-down converters ideally suited for portable systems powered by 1-cell Li-Ion or 3-cell NiMH/NiCd batteries. The devices are also suitable to operate from a standard 3.3-V or 5-V voltage rail.
With an output voltage range of 6 V down to 0.7 V and up to 300 mA output current, the devices are ideal to power low voltage DSPs and processors used in PDAs, pocket PCs, and smart phones. Under nominal load current, the devices operate with a fixed switching frequency of typically 1 MHz. At light load currents, the part enters the power save mode operation; the switching frequency is reduced and the quiescent current is typically only 15 µA; therefore, it achieves the highest efficiency over the entire load current range. The TPS6220x needs only three small external components. Together with the SOT23 package, a minimum system solution size is achieved. An advanced fast response voltage mode control scheme achieves superior line and load regulation with small ceramic input and output capacitors.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS6220x | SOT-23 (5) | 2.90 mm × 1.60 mm |
Changes from E Revision (May 2006) to F Revision
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
EN | 3 | I | This is the enable pin of the device. Pulling this pin to ground forces the device into shutdown mode. Pulling this pin to Vin enables the device. This pin must not be left floating and must be terminated. |
FB | 4 | I | This is the feedback pin of the device. Connect this pin directly to the output if the fixed output voltage version is used. For the adjustable version an external resistor divider is connected to this pin. The internal voltage divider is disabled for the adjustable version. |
GND | 2 | — | Ground |
SW | 5 | I/O | Connect the inductor to this pin. This pin is the switch pin and is connected to the internal MOSFET switches. |
VI | 1 | I | Supply voltage pin |