TC110

Features:

• Assured Start-up at 0.9V
• 50µA (Typ) Supply Current (f_OSC = 100kHz)
• 300mA Output Current @ V_IN 2.7V
• 0.5µA Shutdown Mode
• 100kHz and 300kHz Switching Frequency Options
• Programmable Soft-Start
• 84% Typical Efficiency
• Small Package: 5-Pin SOT-23A




Application

• Palmtops
• Battery-Operated Systems
• Positive LCD Bias Generators
• Portable Communicators




Pinout






Specifications

Parameter Name	Value
SW Reg Output	Fixed
Typical Active Supply (A)	120
Switching Frequency (kHz)	100, 300
Output Voltage (V)	3.0, 3.3, 5.0
Input Voltage Range (V)	2.0 to 10

Voltage on V_DD, V_OUT, SHDN Pins ....... -0.3V to +12V
EXT Output Current .................................±100mA pk
Voltage on EXT Pin ......................-0.3V to V_DD +0.3V
Power Dissipation..........................................150mW
Operating Temperature Range...........-40 to +85
Storage Temperature Range ...........-40 to +125

*Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These
are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability.

Description

The TC110 is a step-up (Boost) switching controller that furnishes output currents as high as 300 mA while delivering a typical efficiency of 84%. The T C110 normally operates in pulse width modulation mode (PWM), but automatically switches to pulse frequency modulation (PFM) at low output loads for greater efficiency. Supply current draw for the 100 KHz version is typically only 50 A, and is reduced to less than 0.5 A when the SHDN input is brought low. Regulator operation is suspended during shutdown. Housed in a tiny 5-pin SOT-23A package, the TC110 occupies minimum board space, and uses tiny external components (the 300 KHz version allows for less than 5 mm surface-mount magnetics). The T C110 accepts input voltages from 2.0V to 10.0V, with a guaranteed start-up voltage of 0.9V.