The TPS6420x are nonsynchronous step-down controllers that are ideally suited for systems powered from a 5-V or 3.3-V bus or for applications powered from a 1-cell Li-Ion battery or from a 2- to 4-cell NiCd, NiMH, or alkaline battery. These step-down controllers drive an external P-channel MOSFET allowing design flexibility. To achieve highest efficiency over a wide load current range, this controller uses a minimum on time, minimum off time control scheme and consumes only 20-µA quiescent current. The minimum on time of typically 600 ns (TPS64203) allows the use of small inductors and capacitors. When disabled, the current consumption is reduced to less than 1 µA. The TPS6420x is available in the 6-pin SOT23 (DBV) package and operates over a free air temperature range of 40°C to 85°C.
|Part number||Order||Vin (Min) (V)||Vin (Max) (V)||Vout (Min) (V)||Vout (Max) (V)||Iout (Max) (A)||Regulated outputs (#)||Number of Phases||Switching frequency (Min) (kHz)||Switching frequency (Max) (kHz)||Iq (Typ) (mA)||Features||Duty cycle (Max) (%)||Operating temperature range (C)||Rating||Package Group||Type||Control mode|
||1.8||6.5||1.2||6.5||3||1||1||350||350||0.02||Enable||100||-40 to 85||Catalog||SOT-23 | 6||Controller||Hysteretic|
||1.8||6.5||1.2||6.5||3||1||1||450||450||0.02||Enable||100||-40 to 85||Catalog||SOT-23 | 6||Controller||Hysteretic|
||1.8||6.5||1.2||6.5||3||1||1||550||550||0.02||Enable||100||-40 to 85||Catalog||SOT-23 | 6||Controller||Hysteretic|
||1.8||6.5||1.2||6.5||3||1||1||800||800||0.02||Enable||100||-40 to 85||Catalog||SOT-23 | 6||Controller||Hysteretic|