TPS60110
REGULATED 5-V 300-mA LOW-NOISE
CHARGE PUMP DC/DC CONVERTER
SLVS215A – JUNE 1999 – REVISED SEPTEMBER 1999
features
applications
Up to 300-mA Output Current
Replaces DC/DC Converters With Inductors in
Less Than 10-mV Output Voltage Ripple
pp
No Inductors Required/Low EMI
Regulated 5-V ±4% Output
– Battery-Powered Applications
– Li-Ion Battery to 5-V Conversion
– Portable Instruments
– Battery-Powered Microprocessor
Systems
– Miniature Equipment
– Backup-Battery Boost Converters
– PDAs
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
– Laptops
– Handheld Instrumentation
– Medical Instruments
Load Isolated in Shutdown
Space-Saving Thermally-Enhanced TSSOP
PowerPAD Package
Evaluation Module Available
(TPS60110EVM–132)
output voltage ripple
description
5.2
5.15
5.1
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.
5.05
5
SKIP =COM = CLK = 0 V
4.95
V
= 3.6 V
= 300 mA
= 22 µF + 10 µF
X5R Ceramic
IN
4.9
4.85
4.8
I
C
O
O
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5 5
t – Time – µs
TheTPS60110featureseitherconstantfrequency
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
frequencyis300kHz. Thelogicshutdownfunction
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
typical operating circuit
INPUT
2.7 V to
5.4 V
OUTPUT
5 V
300 mA
SKIP COM CLK
IN OUT
IN
+
C
IN
15 µF
OUT
FB
+
C
33 µF
O
TPS60110
C1+
C2+
C
2.2 µF
1F
C
2F
2.2 µF
C1–
C2–
ENABLE
SYNC
small 20-pin TSSOP PowerPAD
(PWP).
package
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.
Copyright 1999, 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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265