- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98282 > TPS53353DQPT (TEXAS INSTRUMENTS INC) SWITCHING REGULATOR, PDSO22 PDF資料下載
參數(shù)資料
| 型號(hào)： | TPS53353DQPT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PDSO22 |
| 封裝： | 5 X 6 MM, ROHS COMPLIANT, PLASTIC, SON-22 |
| 文件頁數(shù)： | 7/25頁 |
| 文件大?。?/td> | 556K |
| 代理商： | TPS53353DQPT |
SLUSAK2
– AUGUST 2011
APPLICATION INFORMATION
General Description
The TPS53353 is a high-efficiency, single channel, synchronous buck converter suitable for low output voltage
point-of-load applications in computing and similar digital consumer applications. The device features proprietary
D-CAP
mode control combined with an adaptive on-time architecture. This combination is ideal for building
modern low duty ratio, ultra-fast load step response DC-DC converters. The output voltage ranges from 0.6 V to
5.5 V. The conversion input voltage range is from 3 V up to 15 V and the VDD bias voltage is from 4.5 V to 25 V.
The D-CAP
mode uses the equivalent series resistance (ESR) of the output capacitor(s) to sense the device
current . One advantage of this control scheme is that it does not require an external phase compensation
network. This allows a simple design with a low external component count. Eight preset switching frequency
values can be chosen using a resistor connected from the RF pin to ground or VREG. Adaptive on-time control
tracks the preset switching frequency over a wide input and output voltage range while allowing the switching
frequency to increase at the step-up of the load.
The TPS53353 has a MODE pin to select between auto-skip mode and forced continuous conduction mode
(FCCM) for light load conditions. The MODE pin also sets the selectable soft-start time ranging from 0.7 ms to
5.6 ms as shown in Table 1.
Enable, Soft Start, and Mode Selection
When the EN pin voltage rises above the enable threshold voltage (typically 1.2 V), the controller enters its
start-up sequence. The internal LDO regulator starts immediately and regulates to 5 V at the VREG pin. The
controller then uses the first 250
μs to calibrate the switching frequency setting resistance attached to the RF pin
and stores the switching frequency code in internal registers. During this period, the MODE pin also senses the
resistance attached to this pin and determines the soft-start time . Switching is inhibited during this phase. In the
second phase, an internal DAC starts ramping up the reference voltage from 0 V to 0.6 V. Depending on the
MODE pin setting, the ramping up time varies from 0.7 ms to 5.6 ms. Smooth and constant ramp-up of the
output voltage is maintained during start-up regardless of load current.
Table 1. Soft-Start and MODE Settings
MODE SELECTION
ACTION
SOFT-START TIME (ms)
RMODE (kΩ)
0.7
39
1.4
100
Auto Skip
Pull down to GND
2.8
200
5.6
475
0.7
39
1.4
100
Forced CCM(1)
Connect to PGOOD
2.8
200
5.6
475
(1)
Device enters FCCM after the PGOOD pin goes high when MODE is connected to PGOOD through
the resistor RMODE.
After soft-start begins, the MODE pin becomes the input of an internal comparator which determines auto skip or
FCCM mode operation. If MODE voltage is higher than 1.3 V, the converter enters into FCCM mode. Otherwise
it will be in auto skip mode at light load condition. Typically, when FCCM mode is selected, the MODE pin is
connected to PGOOD through the RMODE resistor, so that before PGOOD goes high the converter remains in
auto skip mode.
Copyright
2011, Texas Instruments Incorporated
15
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS53851RHHT | SWITCHING CONTROLLER, PQCC36 |
| TPS54010PWPG4 | 25 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| TPS54040DGQ | 0.5 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS54073PWPRG4 | 25 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| TPS54073PWPR | 25 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS53353DQPT | 制造商:Texas Instruments 功能描述:SYNCHRONOUS BUCK CONV 20A QFN22 制造商:Texas Instruments 功能描述:SYNCHRONOUS BUCK CONV, 20A, QFN22, Primary Input Voltage:15V, No. of Outputs:1, 制造商:Texas Instruments 功能描述:SYNCHRONOUS BUCK CONV, 20A, QFN22, Primary Input Voltage:15V, No. of Outputs:1, Output Voltage:5.5V, Output Current:20A, No. of Pins:22, Operating Temperature Min:-40C, Operating Temperature Max:85C, MSL:- , RoHS Compliant: No |
| TPS53353EVM-744 | 功能描述:電源管理IC開發(fā)工具 HI-EFF,20A,SYNC BUCK CONVERTER RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS53355 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:High-Efficiency 30-A Synchronous Buck Converter with Eco-modea?￠ |
| TPS53355DQPR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 HI-EFF,30A,SYNC BUCK 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 |
| TPS53355DQPT | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 HI-EFF,30A,SYNC BUCK 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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。