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參數(shù)資料
| 型號(hào)： | CAT3200TDI-T3 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.2 A SWITCHED CAPACITOR REGULATOR, 2600 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | 1 MM HEIGHT, ROHS COMPLIANT, MO-193, TSOT-23, 6 PIN |
| 文件頁(yè)數(shù)： | 10/12頁(yè) |
| 文件大?。?/td> | 191K |
| 代理商： | CAT3200TDI-T3 |
CAT3200, CAT32005
http://onsemi.com
7
Device Operation
The CAT3200/CAT32005 use a switched capacitor
charge pump to boost the voltage at IN to a regulated output
voltage. Regulation is achieved by sensing the output
voltage through an internal resistor divider (CAT32005)
and modulating the charge pump output current based on the
error signal. A 2phase nonoverlapping clock activates the
charge pump switches. The flying capacitor is charged from
the IN voltage on the first phase of the clock. On the second
phase of the clock it is stacked in series with the input voltage
and connected to OUT. The charging and discharging the
flying capacitor continues at a free running frequency of
typically 2 MHz.
In shutdown mode all circuitry is turned off and the
CAT3200/CAT32005 draw only leakage current from the
VIN supply. OUT is disconnected from IN. The SHDN pin
is a CMOS input with a threshold voltage of approximately
0.8 V. The CAT3200/CAT32005 is in shutdown when a
logic LOW is applied to the SHDN pin. The SHDN pin is a
high impedance CMOS input. SHDN does not have an
internal pulldown resistor and should not be allowed to
float and. It must always be driven with a valid logic level.
ShortCircuit and Thermal Protection
The CAT3200 and CAT32005 have builtin
shortcircuit current limiting and over temperature
protection. During overload conditions, output current is
limited to approximately 225 mA. At higher temperatures,
or if the input voltage is high enough to cause excessive chip
self heating, the thermal shutdown circuit shuts down the
charge pump as the junction temperature exceeds
approximately 160
°C. Once the junction temperature drops
back to approximately 140
°C, the charge pump is enabled.
The CAT3200 and CAT32005 will cycle in and out of
thermal shutdown indefinitely without latchup or damage
until a shortcircuit on OUT is removed.
Programming the CAT3200 Output Voltage (FB Pin)
The CAT32005 version has an internal resistive divider
to program the output voltage. The programmable CAT3200
may be set to an arbitrary voltage via an external resistive
divider. Since it employs a voltage doubling charge pump,
it is not possible to achieve output voltages greater than
twice the available input voltage. Figure 17 shows the
required voltage divider connection. The voltage divider
ratio is given by the formula:
R1
R2 +
VOUT
1.27 V *
1
Typical values for total voltage divider resistance can
range from several k
Ws up to 1 MW.
Figure 17. Programming the Adjustable CAT3200
OUT
FB
1.27 V
R1
R2
8
7
4
5
CPOS
CNEG
IN
3
2
6
1
SHDN
PGND
SGND
COUT
VOUT
1 ) R1
R2
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| CAT3200TDI-TE13 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:Low Noise Regulated Charge Pump DC-DC Converter |
| CAT3200TDI-TE7 | 功能描述:電荷泵 Lo-Noise Charge Pump 5V Fixed Output 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 |
| CAT3200ZI-GT3 | 功能描述:電荷泵 DC-DC CHG PUMP VADJ 100mA 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 |
| CAT3200ZI-T3 | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 DC-DC,2X Charge Pump Vadj -100mA RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| CAT3200ZI-TE13 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:Low Noise Regulated Charge Pump DC-DC Converter |
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