TPS60110
REGULATED 5-V 300-mA LOW-NOISE
CHARGE PUMP DC/DC CONVERTER
SLVS215A – JUNE 1999 – REVISED SEPTEMBER 1999
features
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
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Up to 300-mA Output Current
Less Than 10-mV
pp
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)
description
The TPS60110 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 300 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 TPS60110 can start
into full load with loads as low as 16
Ω.
The TPS60110 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 TPS60110 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).
output voltage ripple
5.2
5.15
VO – Output Voltage – V
5.1
5.05
5
4.95
4.9
4.85
4.8
0
0.5
1
1.5
SKIP =COM = CLK = 0 V
VIN = 3.6 V
IO = 300 mA
CO = 22
µF
+ 10
µF
X5R Ceramic
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
15
µF
+
OUTPUT
5V
300 mA
+ CO
33
µF
C2F
2.2
µF
SKIP COM CLK
IN
IN
OUT
OUT
TPS60110 FB
C2+
C2–
SYNC
C1F
2.2
µF
C1+
C1–
ENABLE
OFF/ON
PGND GND
Figure 1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
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, Texas Instruments Incorporated
POST OFFICE BOX 655303
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