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TPS60100_16

更新时间： 2024-02-08 15:58:07
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德州仪器 - TI /
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22页 350K
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REGULATED 3.3 V 200-MA LOW-NOISE CHARGE PUMP DC/DC CONVERTER

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TPS60100  
REGULATED 3.3 V 200-mA LOW-NOISE  
CHARGE PUMP DC/DC CONVERTER  
SLVS213B – MAY 1999 – REVISED SEPTEMBER 1999  
features  
applications  
Up to 200-mA Output Current  
Replaces DC/DC Converters With Inductors in  
Less Than 5-mV Output Voltage Ripple  
pp  
– Battery-Powered Applications  
– Two Battery Cells to 3.3-V Conversion  
– Portable Instruments  
– Battery-Powered Microprocessor and  
DSP Systems  
– Miniature Equipment  
– Backup-Battery Boost Converters  
– PDAs  
No Inductors Required/Low EMI  
Regulated 3.3-V ±4% Output  
Only Four External Components Required  
Up to 90% Efficiency  
1.8-V to 3.6-V Input Voltage Range  
50-µA Quiescent Supply Current  
0.05-µA Shutdown Current  
– Laptops  
– Handheld Instrumentation  
– Medical Instruments  
– Cordless Phones  
Load Isolated in Shutdown  
Space-Saving Thermally-Enhanced TSSOP  
PowerPAD Package  
Evaluation Module Available  
(TPS60100EVM–131)  
output voltage ripple  
description  
3.45  
3.4  
The TPS60100 step-up, regulated charge pump  
generates a 3.3-V ±4% output voltage from a  
1.8-V to 3.6-V input voltage (two alkaline, NiCd, or  
NiMH batteries). Output current is 200 mA from a  
2-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 2-V input, the  
TPS60100 can start into full load with loads as low  
as 16 Ω.  
3.35  
3.3  
3.25  
SKIP =COM = 3V8 = 0 V  
3.2  
V
= 2.4 V  
= 200 mA  
= 22 µF  
X5R Ceramic  
IN  
3.15  
3.1  
I
C
O
O
3.05  
0
1
2
3
4
5
6
7
8
9
10  
t – Time – µs  
The TPS60100 features either constant frequen-  
cy mode to minimize noise and output voltage  
ripple or the power-saving pulse-skip mode to  
extend battery life at light loads. The TPS60100  
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).  
typical operating circuit  
INPUT  
1.8 V to  
3.6 V  
OUTPUT  
3.3 V  
200 mA  
SKIP COM 3V8  
IN OUT  
IN  
+
C
IN  
10 µF  
OUT  
FB  
+
C
22 µF  
O
TPS60100  
C1+  
C2+  
C2–  
C
2.2 µF  
1F  
C
2F  
2.2 µF  
C1–  
ENABLE  
SYNC  
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  
1234567...22

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