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參數(shù)資料
| 型號： | TPS60242DGKR |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 170-uVrms ZERO-RIPPLE SWITCHED CAP BUCK-BOOST CONVERTER FOR VCO SUPPLY |
| 中文描述： | 170 - uVrms零紋波開關(guān)電容升降壓轉(zhuǎn)換器的VCO的電源 |
| 文件頁數(shù)： | 4/20頁 |
| 文件大?。?/td> | 377K |
| 代理商： | TPS60242DGKR |
TPS60240, TPS60241
TPS60242, TPS60243
SLVS372B
–
JUNE 2001
–
REVISED JANUARY 2002
4
www.ti.com
detailed description
operating principle
The TPS6024x charge pump is a fixed-frequency, dual-phase charge pump that provides 25 mA of continuous
supply current for low-noise applications such as VCOs used in cell phones and wireless appliances.
Low-noise operation results from using a proprietary dual-phase charge pump topology that relies on an
operational amplifier in the feedback loop to reduce ripple. During the first phase, C
1
is charged to the supply
voltage. Terminal C
1+
is connected to V
IN
, and C
1
–
is connected to GND. In the second phase, C
1
–
is connected
to the output of the operational amplifier, and C
1+
is connected to V
OUT
. The operational amplifier then adjusts
its output until the output V
OUT
delivers the correct voltage to make the resistor divided feedback point equal
to the reference voltage. During this second phase, C
2
is charged to supply voltage. Terminal C
2
–
is connected
to GND, and C
2+
is connected to V
IN
. Phase one is then repeated with C
2
, now acting to provide charge to the
output in place of C
1
, which is connected to the supply. The dual-phase operation lowers the output ripple
voltage significantly compared to a standard single-phase charge pump. In addition, the linear feedback of the
operational amplifier eliminates the ripple during discharge of the output capacitor (C
O
).
shutdown
Driving EN low disables the converter. This disables the internal circuits and reduces input current to typically
0.1
μ
A. In this mode, the load is disconnected from the supply voltage. The device exits shutdown once EN is
set to a high level.
start-up procedure
The converter is enabled when EN is set from logic low to high. The start-up time to reach 90% of the nominal
output voltage is typically 0.5 ms at load currents lower than 10 mA and with an output capacitor of 1
μ
F.
Increasing the values of C
O
delays the start-up time.
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
Supply voltage, V
DD
Power dissipation, P
D
Voltage EN
Voltage C
2
–
, C
1
–
Voltage C
2+
, C
1+
Junction temperature, T
J
Storage temperature, T
stg
Shortcircuit output current
–
0.3 V to 6 V
Internally limited
–
0.3 V to 6 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–
0.3 V to V
I
or 5.5 V, whichever is lowest
–
0.3 V to V
I
, V
O,
or 5.5 V, whichever is lowest
125
°
C
–
65
°
C to 150
°
C
80 mA maximum
Stresses beyond those listed under
“
absolute maximum ratings
”
may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under
“
recommended operating conditions
”
is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
DISSIPATION RATING TABLE
PACKAGE
TA
≤
25
°
C
POWER RATING
DERATING FACTOR
ABOVE TA = 25
°
C
3.76 mW/
°
C
TA = 70
°
C
POWER RATING
TA = 85
°
C
POWER RATING
DGK
376 mW
207 mW
150 mW
NOTE: The thermal resistance junction to ambient of the DGK package is RTH
–
JA = 150
°
C/W.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| TPS60242DGKRG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 170 uVrms Boost Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS60242DGKT | 功能描述:電荷泵 170 uVrms Boost Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| TPS60242DGKTG4 | 功能描述:電荷泵 170 uVrms Boost Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| TPS60243 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:170-uVrms ZERO-RIPPLE SWITCHED CAP BUCK-BOOST CONVERTER FOR VCO SUPPLY |
| TPS60243DGK | 制造商:Texas Instruments 功能描述:CHG PUMP STPUP 3V 25MA 8MSOP - Bulk |
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