TPS60204_15 Datasheet, PDF (1/21 Pages) Texas Instruments – REGULATED 3.3-V 100-MA LOW-RIPPLE CHARGE PUMP LOW POWER DC/DC CONVERTERS

TPS60204, TPS60205
REGULATED 3.3ĆV, 100ĆmA LOWĆRIPPLE CHARGE PUMP
LOW POWER DC/DC CONVERTERS
SLVS354A − FEBRUARY 2001 − REVISED SEPTEMBER 2001
features
D Regulated 3.3-V Output Voltage With up to
100-mA Output Current From a 1.8-V to
3.6-V Input Voltage
D Less Than 5-mV_(PP) Output Voltage Ripple
Achieved With Push-Pull Topology
D Integrated Low-Battery and Power-Good
Detector
D Switching Frequency Can Be Synchronized
to External Clock Signal
D Extends Battery Usage With up to 90%
Efficiency and 35-µA Quiescent Supply
Current
D Easy-to-Design, Low Cost, Low EMI Power
Supply Since No Inductors Are Used
D 0.05-µA Shutdown Current, Battery is
Isolated From Load in Shutdown Mode
·
description
D Compact Converter Solution in UltraSmall
10-pin MSOP With Only Four External
Capacitors Required
D Evaluation Module Available
(TPS60200EVM-145)
applications
D Replaces DC/DC Converters With Inductors
in Battery Powered Applications Like:
− Two Battery Cells to 3.3-V Conversion
− MP3 Portable Audio Players
− Battery-Powered Microprocessor
Systems
− Backup-Battery Boost Converters
− PDA’s, Organizers, and Cordless Phones
− Handheld Instrumentation
− Glucose Meters and Other Medical
Instruments
The TPS6020x step-up, regulated charge pumps generate a 3.3-V ±4% output voltage from a 1.8-V to 3.6-V
input voltage. The devices are typically powered by two Alkaline, NiCd, or NiMH battery cells and operate down
to a minimum supply voltage of 1.6 V. Continuous output current is a minimum of 100 mA from a 2-V input. Only
four external capacitors are needed to build a complete low-ripple 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.
INPUT
1.6 V to 3.6 V
TPS60204
7
5
IN
OUT
OUTPUT
3.3 V, 100 mA
Ci
2.2 µF
R1
1 _LBI
R2
R3
Co
2.2 µF
350
10
LBO
300
Low Battery
4
6
Warning
250
C1+
C2+
C1
1 µF
3 _C1−
9
8
C2−
C2
1 µF
200
EN
150
OFF/ON
GND
2
100
TPS60204
PEAK OUTPUT CURRENT
vs
INPUT VOLTAGE
Figure 1. Typical Application Circuit
With Low-Battery Warning
50
0
1.6
2.0
2.4
2.8
3.2
3.6
VI − Input Voltage − V
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.
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  2001, Texas Instruments Incorporated
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