TPS60111_15 Datasheet, PDF (1/25 Pages) Texas Instruments – REGULATER 5-V 150-MA LOW-NOISE CHARGE PUMP DC/DC CONVERTER

features
D Up to 150-mA Output Current
D Less Than 10-mV_pp Output Voltage Ripple
D No Inductors Required/Low EMI
D Regulated 5-V ±4% Output
D Only Four External Components Required
D Up to 90% Efficiency
D 2.7-V to 5.4-V Input Voltage Range
D 60-µA Quiescent Supply Current
D 0.05-µA Shutdown Current
D Load Isolated in Shutdown
D Space-Saving Thermally-Enhanced TSSOP
PowerPAD Package
D Evaluation Module Available
(TPS60110EVM−132)
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 cur-
rent 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).
TPS60111
REGULATED 5ĆV 150ĆmA LOWĆNOISE
CHARGE PUMP DC/DC CONVERTER
SLVS216B − JUNE 1999 − JUNE 2008
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
output voltage ripple
5.2
5.15
5.1
5.05
5
4.95
SKIP =COM = CLK = 0 V
VIN = 3.6 V
4.9
IO = 150 mA
4.85
CO = 22 µF + 10 µF
X5R Ceramic
4.8
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
t − Time − µs
typical operating circuit
INPUT
2.7 V to
5.4 V
CIN ⁺
4.7 µF
C1F
1 µF
SKIP COM CLK
IN
OUT
IN
OUT
TPS60110 FB
C1+
C2+
C1−
C2−
OUTPUT
5V
150 mA
+ _CO
15 µF
C2F
1 µF
OFF/ON
ENABLE SYNC
PGND GND
Figure 1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright  1999 − 2008, Texas Instruments Incorporated
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