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參數(shù)資料
| 型號： | TPS51113DRCR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件頁數(shù)： | 26/26頁 |
| 文件大小： | 2137K |
| 代理商： | TPS51113DRCR |
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V
OUT
t – Time
t
SS_Delay
t
SS
PGOOD Delay at Startup
6% of V
OUT
1 V
PGOOD Delay
at Shutdown
V
COMP_EN
V
PGOOD
UDG-08108
www.ti.com ....................................................................................................................................................................................................... SLUS864 – MAY 2009
DETAILED DESCRIPTION
TPS51113 and TPS51163 are cost-optimized, single channel synchronous buck controllers that operate at a
300-kHz (TPS51113) and 600-kHz (TPS51163) fixed switching frequency, from a single 4.5-V to 13.2-V supply,
and supports output pre-biased startup. The overcurrent protection uses the low-side RDS(on) current sensing for
a low-cost, loss-less solution. Other features include input undervoltage lockout (UVLO), programmable
overcurrent threshold, soft-start, output oververvoltage/undervoltage (OV/UV) protection. The integrated gate
driver is powered directly by VDD. This makes the gate drive voltage more flexible.
SOFT START AND SELF-CALIBRATION
When VDD is above 4.3 V and the COMP_EN pin is released from being pulled low with open-drain system
logic, the controller enters the start-up sequence. There is a two stage start-up sequence for the COMP_EN
voltage. In the first phase of start-up (tSS_delay), the controller completes self-calibration and inhibits FET
switching, leaving both the upper and lower MOSFETs in the off state. In the second phase of start-up (tSS),
soft-start begins and switching is enabled. The internal reference gradually rises to 800 mV, and the output
voltage gets within its regulation point. The soft-start time (tSS) is internally programmed at 3.5 ms, and tSS_Delay is
programmed at 5.5 ms. On average, it takes approximately 9 ms for the output voltage to come into regulation
after the COMP_EN pin is released.
Figure 7 shows the typical startup and shutdown sequence. The overcurrent protection is enabled when the
soft-start begins and the soft-start voltage exceeds the pre-biased VOS voltage. The output overvoltage
protection is enabled approximately 64 clock cycles after the COMP pin voltage rises above 0.8 V (thereby
enabling the device). When the soft-start ends, the output undervoltage protection is enabled, and PGOOD
signal also goes high at the same time.
Figure 7. Typical Startup and Shutdown Sequence
Copyright 2009, Texas Instruments Incorporated
9
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相關(guān)代理商/技術(shù)參數(shù) |
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| TPS51113DRCT | 功能描述:DC/DC 開關(guān)控制器 4.5-13.2V Synch Buck Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS51113DRCT | 制造商:Texas Instruments 功能描述:; Controller Type:Synchronous Buck; Inpu |
| TPS51113EVM | 功能描述:電源管理IC開發(fā)工具 25A Synch Buck Cnvrtr Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS51116 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:COMPLETE DDR AND DDR2 MEMORY POWER SOLUTION SYNCHRONOUS BUCK CONTROLLER, 3-A LDO, BUFFERED REFERENCE |
| TPS51116_12 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:COMPLETE DDR, DDR2 AND DDR3 MEMORY POWER SOLUTION SYNCHRONOUS BUCK CONTROLLER, 3-A LDO, BUFFERED REFERENCE |
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