參數(shù)資料
型號(hào)： L6712ADTR
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 2 A SWITCHING CONTROLLER, PDSO28
封裝： SO-28
文件頁(yè)數(shù)： 29/29頁(yè)
文件大小： 624K
代理商： L6712ADTR
9/29
L6712A L6712
Figure 5. ROSC vs. Switching Frequency
3.2 DIGITAL TO ANALOG CONVERTER AND REFERENCE
The built-in digital to analog converter allows the adjustment of the output voltage from 0.900V to 3.300V
as shown in Figure 6. Different voltages can be reached simply changing the Remote Amplifier Gain that
acts as a resistor divider (See relevant section).
The internal reference is trimmed during production process to have an output voltage accuracy of ±0.9%
and a zero temperature coefficient around 70°C including also error amplifier offset compensation. It is
programmed through the voltage identification (VID) pins. These are inputs of an internal DAC that is re-
alized by means of a series of resistors providing a partition of the internal voltage reference. The VID code
drives a multiplexer that select a voltage on a precise point of the divider (see Figure 6). The DAC output
is delivered to an amplifier obtaining the VPROG voltage reference (i.e. the set-point of the error amplifier).
Internal pull-ups are provided (realized with a 5
A current generator up to 3V typ.); in this way, to program
a logic "1" it is enough to leave the pin floating, while to program a logic "0" it is enough to short the pin to
SGND.
The device offers a bi-directional pin REF_IN/OUT: the internal reference used for the regulation is usually
available on this pin with 3mA of maximum current capability except when VID code 111 is programmed;
in this case the device accepts an external reference through the REF_IN/OUT pin and regulates on it.
When external reference is used, it must range from 0.800V up to 3.300V to assure proper functionality of
the device.
Figure 6 shows a block schematic of how the Reference for the regulation is managed when internal or
external reference is used.
The voltage identification (VID) pin configuration or the external reference provided also sets the power-
good thresholds (PGOOD) and the Over/Under voltage protection (OVP/UVP) thresholds.
0
100
200
300
400
500
600
700
800
150
250
350
450
550
650
Frequency (kHz)
Ro
sc
(K
)vs.
GND
0
2000
4000
6000
8000
10000
12000
14000
25
50
75
100
125
150
Frequency (kHz)
Rosc
(K
)v
s.
12
V
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6712AQ 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2-Ph Interleaved RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
L6712AQTR 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2-Ph Interleaved RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
L6712D 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2-Ph Interleaved RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
L6712DTR 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2-Ph Interleaved RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
L6712Q 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2-Ph Interleaved RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
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