features
Up to 150-mA Output Current
Less Than 10-mVpp Output Voltage Ripple
No Inductors Required/Low EMI
Regulated 5-V ±4% Output
Only Four External Components Required
Up to 90% Efficiency
2.7-V to 5.4-V Input Voltage Range
60-μA Quiescent Supply Current
0.05-μA Shutdown Current
Load Isolated in Shutdown
Space-Saving Thermally-Enhanced TSSOP
PowerPAD Package
Evaluation Module Available
(TPS60110EVM−132)

applications
Replaces DC/DC Converters With Inductors in
− Battery-Powered Applications
− Li-Ion Battery to 5-V Conversion
− Portable Instruments
− Battery-Powered Microprocessor
Systems
− Miniature Equipment
− Backup-Battery Boost Converters
− PDAs
− Laptops
− Handheld Instrumentation
− Medical Instruments

description
The TPS60111 step-up, regulated charge pump
generates a 5-V ±4% output voltage from a 2.7-V
to 5.4-V input voltage (three alkaline, NiCd, or
NiMH batteries; or, one lithium or lithium ion
battery). Output current is 150 mA from a 3-V
input. Only four external capacitors are needed to
build a complete low-noise dc/dc converter. The
push-pull operating mode of two single-ended
charge pumps assures the low output voltage
ripple as current is continuously transferred to the
output. From a 3-V input, the TPS60111 can start
into full load with loads as low as 33 Ω.
The TPS60111 features either constant frequency
mode to minimize noise and output voltage ripple
or the power-saving pulse-skip mode to extend
battery life at light loads. The TPS60111 switching
frequency is 300 kHz. The logic shutdown function
reduces the supply current to 1-μA (max) and
disconnects the load from the input. Special
current-control circuitry prevents excessive current
from being drawn from the battery during
start-up. This dc/dc converter requires no
inductors and has low EMI. It is available in the
small 20-pin TSSOP PowerPAD package
(PWP).