1 Features
1• Up to 95% Efficiency at Typical Operating
Conditions
• 5.5 μA Quiescent Current
• Startup Into Load at 0.7 V Input Voltage
• Operating Input Voltage from 0.7 V to 5.5 V
• Pass-Through Function during Shutdown
• Minimum Switching Current 200 mA
• Protections:
– Output Overvoltage
– Overtemperature
– Input Undervoltage Lockout
• Adjustable Output Voltage from 1.8 V to 6 V
• Fixed Output Voltage Versions
• Small 6-pin SC-70 Package

2 Applications
• Battery Powered Applications
– 1 to 3 Cell Alkaline, NiCd or NiMH
– 1 cell Li-Ion or Li-Primary
• Solar or Fuel Cell Powered Applications
• Consumer and Portable Medical Products
• Personal Care Products
• White or Status LEDs
• Smartphones

3 Description
The TPS6122x family devices provide a power-supply
solution for products powered by either a single-cell,
two-cell, or three-cell alkaline, NiCd or NiMH, or one-
cell Li-Ion or Li-polymer battery. Possible output
currents depend on the input-to-output voltage ratio.
The boost converter is based on a hysteretic
controller topology using synchronous rectification to obtain maximum efficiency at minimal quiescent
currents. The output voltage of the adjustable version
can be programmed by an external resistor divider, or
is set internally to a fixed output voltage. The converter can be switched off by a featured enable
pin. While being switched off, battery drain is
minimized. The device is offered in a 6-pin SC-70
package (DCK) measuring 2 mm x 2 mm to enable
small circuit layout size.