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參數(shù)資料
| 型號(hào)： | SP6680 |
| 英文描述： | High Efficiency Charge Pump Regulator(高效電荷泵穩(wěn)壓器) |
| 中文描述： | 高效電荷泵穩(wěn)壓器（高效電荷泵穩(wěn)壓器） |
| 文件頁數(shù)： | 7/12頁 |
| 文件大小： | 176K |
| 代理商： | SP6680 |
7
Rev. 1/29/01
SP6680 High Efficiency Buck/Boost Charge Pump Regulator Copyright 2001 Sipex Corporation
Figure 3. Typical SIM Card Application Circuit for the SP6680
Any standard CMOS logic output is suitable for
driving the C/4 or Cx8 control lines as long as
logic low is less than 0.4V and logic high is
greater than 1.3V.
Efficiency
Power efficiency with the SP6680 charge pump
regulator is improved over standard charge pumps
doubler circuits by the inclusion of an 1.5X
output mode, as described in the Theory of
Operation section. The net result is an increase
in efficiency at battery inputs greater than 3.7 to
3.8V where the SP6680 switches to the 1.5X
mode. This is illustrated in figure 4 Efficiency vs
Input Voltage.
Capacitor Selection
In order to maintain the lowest output resistance,
input ripple voltage and output ripple voltage,
multi-layer ceramic capacitors with inherently
low ESR are recommended. Refer to Table 2 for
some suggested low ESR capacitors. Tables of
output resistance and ripple voltages for a vari-
ety of input, output and pump capacitors are
included here to use as a guide in capacitor
selection. Measured conditions are with CLK =
32kHz, 5mA output load and all capacitors are
2.2uF except when stated otherwise. A DC
power supply with added 0.25ohm output ESR
was used to simulate a Lithium Ion Battery as
shown in figure 5.
Figure 4. Efficiency vs Battery Voltage
Figure 5. Capacitor Selection Test Circuit
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L
C
n
4
C
n
8
x
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U
P
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s
e
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X
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k
8
6
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3
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6
7
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H
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8
6
7
3
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g
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1
6
2
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6
7
3
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2
9
1
z
H
k
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6
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3
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4
1
6
2
SP6680 Efficiency vs Battery Voltage
50
60
70
80
90
100
3.0
3.3
3.6
3.9
4.2
Battery Voltage (V)
8.192kHz, Iout = 2mA
32.768kHz, Iout = 10mA
262.14kHz, Iout = 40mA
Table 1. Control Line Logic for the Internal Charge
Pump Oscillator
V
OUT
= +5.2V to +6.3V
C/4
Cx8
CLK
GND
SP6680
8
CF1P
CF1N
9
CF2P
CF2N
4.7
μ
F
2.2
μ
F
2.2
μ
F
2
10
7
1
6
4
5
3
LithiBattery
LDO
+5.0V output
V
IN
2.2
μ
F
2.2
μ
F
PHP3631A
1000
μ
F
0.25ohm
0.75” Leads
+
-
V
IN
(p-p)
2.2
μ
F Caps
V
OUT
(p-p)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP6681 | High Efficiency Boost Charge Pump Regulator |
| SP6681EU | High Efficiency Boost Charge Pump Regulator |
| SP6682 | High Efficiency Charge Pump Regulator for White LEDs |
| SP6682ER | High Efficiency Charge Pump Regulator for White LEDs |
| SP6682EU | High Efficiency Charge Pump Regulator for White LEDs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP6680EB | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6680EU | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6680EU/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High Efficiency Buck/Boost Charge Pump Regulator |
| SP6680EU-L | 制造商:Exar Corporation 功能描述:REG BUCK/BOOST CHARGE PUMP 6680 |
| SP6680TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High Efficiency Buck/Boost Charge Pump Regulator |
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