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參數資料
| 型號： | TPS65250RHAR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 4 A SWITCHING REGULATOR, 2200 kHz SWITCHING FREQ-MAX, PQCC40 |
| 封裝： | 6 X 6 MM, GREEN, PLASTIC, MO-220VJJD-2, VQFN-40 |
| 文件頁數： | 1/38頁 |
| 文件大小： | 1782K |
| 代理商： | TPS65250RHAR |
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SLVSAA3B – JUNE 2010 – REVISED JANUARY 2011
4.5-V TO 18-V INPUT, HIGH CURRENT, SYNCHRONOUS STEP DOWN THREE BUCK
CONVERTER WITH INTEGRATED FET AND DYING GASP STORAGE AND RELEASE
CIRCUIT
Check for Samples: TPS65250
1
FEATURES
Soft Start Pins
Wide Input Supply Voltage Range
Current-Mode Control With Simple
(4.5 V - 18 V)
Compensation Circuit
0.8 V, 1% Accuracy Reference
Power Good and Reset Generator
Continuous Loading: 3 A (Buck 1),
Storage and Release Circuit Optimized for
2 A (Buck 2 and 3)
Reduction of Storage Capacitance in Dying
Gasp Mode (Option)
Maximum Current: 3.5 A (Buck 1),
2.5 A (Buck 2 and 3)
Low Power Mode Set By External Signal
Adjustable Switching Frequency
QFN Package, 40-Pin 6 mm x 6 mm RHA
300 kHz - 2.2 MHz Set By External Resistor
APPLICATIONS
External Synchronization Pin for Oscillator
xDSL/xPON Modems
External Enable/Sequencing and Soft Start
Cable Modems
Pins
Power Line Modem
Adjustable Current Limit Set By External
Home Gateway and Access Point Networks
Resistor
Wireless Routers
Set Top Box
DESCRIPTION/ORDERING INFORMATION
The TPS65250 features three synchronous wide input range high efficiency buck converters. The converters are
designed to simplify its application while giving the designer the option to optimize their usage according to the
target application.
The converters can operate in 5-, 9-, 12- and 15-V systems and have integrated power transistors. The output
voltage can be set externally using a resistor divider to any value between 0.8 V and the input supply minus 1 V.
Each converter features enable pin that allows a delayed start-up for sequencing purposes, soft start pin that
allows adjustable soft-start time by choosing the soft-start capacitor, and a current limit (RLIMx) pin that enables
designer to adjust current limit by selecting an external resistor and optimize the choice of inductor. The COMP
pin allows optimizing transient versus dc accuracy response with a simple RC compensation.
The switching frequency of the converters can either be set with an external resistor connected to ROSC pin or
can be synchronized to an external clock connected to SYNC pin if needed. The switching regulators are
designed to operate from 300 kHz to 2.2 MHz. Both Bucks 2 and Buck 3 run in-phase and 180° out of phase with
Buck 1 to minimize input filter requirements.
TPS65250 features a unique storage and release circuitry for dying gasp mode. The storage capacitor is
separated from input capacitor during normal operation. The storage and release circuit will charge the storage
capacitor with a controlled circuit to reduce the inrush current from the adaptor supply to a storage voltage of
20 V to accumulate as much energy as possible taking advantage of the CV feature.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright 2010–2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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相關代理商/技術參數 |
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| TPS65250RHAT | 功能描述:PMIC 解決方案 PMU w/3 DC/DC Cnvrtr & Charge & Pump RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS652510EVM | 功能描述:電源管理IC開發工具 TPS652510 Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS652510RHAR | 功能描述:PMIC 解決方案 3 DC-DC Converters RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS652510RHAT | 功能描述:PMIC 解決方案 3 DC-DC Converters RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS65251-1RHAT | 功能描述:Buck Switching Regulator IC Positive Adjustable 0.8V 3 Output 3A, 2A 40-VFQFN Exposed Pad 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態:有效 功能:降壓 輸出配置:正 拓撲:降壓 輸出類型:可調式 輸出數:3 電壓 - 輸入（最小值）:4.5V 電壓 - 輸入（最大值）:18V 電壓 - 輸出（最小值/固定）:0.8V 電壓 - 輸出（最大值）:17V 電流 - 輸出:3A，2A 頻率 - 開關:300kHz ~ 2.2MHz 同步整流器:是 工作溫度:-40°C ~ 125°C （TJ） 安裝類型:表面貼裝 封裝/外殼:40-VFQFN 裸露焊盤 供應商器件封裝:40-VQFN（6x6） 標準包裝:1 |
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