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參數資料
| 型號： | TPS53314RGFR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING REGULATOR, 1070 kHz SWITCHING FREQ-MAX, PQCC40 |
| 封裝： | 5 X 7 MM, GREEN, PLASTIC, VQFN-40 |
| 文件頁數： | 10/29頁 |
| 文件大小： | 800K |
| 代理商： | TPS53314RGFR |
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SLUSAK3
– MAY 2011
General Description
The TPS53314 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. The D-CAP
mode uses the 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
the VREG pin. 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 TPS53314 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.
Enable and Soft Start
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. However, 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
SOFT-START TIME
RMODE
MODE SELECTION
ACTION
(ms)
(k
Ω)
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)
The device transitions into FCCM after the PGOOD pin goes high.
18
Copyright
2011, Texas Instruments Incorporated
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相關代理商/技術參數 |
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| TPS53314RGFT | 功能描述:直流/直流開關轉換器 4.5-25Vin,6A Step- Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| TPS53315 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:12-A Step-Down Regulator with Integrated Switcher |
| TPS53315RGFR | 功能描述:直流/直流開關調節器 12A Step-Down Reg RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS53315RGFT | 功能描述:直流/直流開關調節器 12A Step-Down Reg RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS53316 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:High-Efficiency, 5-A Step-Down Regulator with Integrated Switcher |
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