參數(shù)資料
型號(hào)： MIC2660
廠商： Micrel Semiconductor,Inc.
英文描述： IttyBitty Charge Pump
中文描述： IttyBitty電荷泵
文件頁(yè)數(shù)： 1/8頁(yè)
文件大?。?/td> 93K
代理商： MIC2660
August 1999
1
MIC2660
MIC2660
Micrel
MIC2660
IttyBitty Charge Pump
Not Recommended for New Designs
General Description
The MIC2660 IttyBitty charge pump functions as a low-
current, step-up converter where conventional inductor based,
dc-to-dc converters are too complex and expensive. This
device features a complete, self-contained charge pump in a
tiny 5-lead SOT-23-5 package.
The MIC2660 is powered from a 3V to 5V nominal supply and
produces nominally 5V to 9V as a function of the input
voltage. The output is unregulated and follows a load-line
type function.
The MIC2660 can be used with or without external compo-
nents. When used with two noncritical external capacitors, a
3V input will produce 5V at 3.8mA. With no external compo-
nents, a 3V input will produce 5V at 2.5mA.
The MIC2660 charge pump consists of an approximately
18MHz oscillator and a voltage tripler.
The MIC2660 is available in the SOT-23-5 package and
is rated for –40
°
C to +85
°
C ambient temperature range.
Typical Application
IN
OUT
MIC2660
1
3
GND
2
+3V Input
EN
5
0.01μF
+5V, 2.5mA*
Output
0.01μF
* The output is unregulated and
follows a load-line type function
Enable
Disable
Low-Current Unregulated Step-Up Supply
Timing Diagram
EN
0V
2V
OUT
5V
1V
0V
0.2
μs
1.3
μs
Output vs. Enable Input
Features
3V input produces approx. 5V unregulated output*
3.8mA with 1
μ
F external output capacitor
2.5mA without external capacitor
5V input produces approx. 9V unregulated output*
4.5mA output without external capacitor
CMOS-logic compatible enable
ESD protected
Applications
Squib firing
Refresh
Burst/dump
Low duty cycle load
LCD bias generator
Local 5V logic supply
MOSFET driver
Battery or solarcell boost
Ordering Information
Part Number
MIC2660BM5
Temperature Range
–40
°
C to +85
°
C
Package
SOT-23-5
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
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