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参数资料
| 型号： | TPS650003RTET |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.4 A SWITCHING REGULATOR, 2847 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封装： | 3 X 3 MM, PLASTIC, QFN-16 |
| 文件页数： | 6/34页 |
| 文件大小： | 0K |
| 代理商： | TPS650003RTET |
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Outputvoltage
V
+1%
OUT(nom)
V
OUT(nom)
Lightload
PFMMode
moderatetoheavyload
PWMMode
Time
90%
10%
t
RAMP
t
Start
EN
V
OUT
SLVS810B – JUNE 2009 – REVISED AUGUST 2010
www.ti.com
Figure 22. PFM Voltage Positioning
Pulling the MODE pin to DC ground will result in automatic transition between PFM and PWM modes to
maximize efficiency.
The DCDC converter output automatically discharges to ground through an internal 450
Ω load when EN_DCDC
goes low or when the UVLO condition is met.
SOFT START
The step-down converter has an internal soft start circuit that limits the inrush current during start-up. During soft
start, the output voltage ramp up is controlled as shown in Figure 23.
Figure 23. Soft Start
LINEAR REGULATORS
The two linear dropout regulators (LDOs) in the TPS65000 and TPS65001 are designed to provide flexibility in
system design. Each LDO has a separate voltage input and enable signal. The input can be tied to the output of
the step-down converter or the output of another voltage source. Each LDO output discharge to ground
automatically when EN_LDOx goes low.
A resistor network is needed to set the output voltage of the LDOs. Fixed voltage output versions are also
available; contact Texas Instruments sales representative for more information.
The LDOs are general-purpose devices that can handle inputs from 6V down to 1.6V, making them suitable for
direct connection to the battery. Figure 24 illustrates the necessary connections for LDO1. The same architecture
applies to LDO2.
14
Copyright 2009–2010, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
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| TPS650006EVM-585 | 功能描述:电源管理IC开发工具 Eval Mod for TPS650006 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS650006RTER | 功能描述:PMIC 解决方案 2.25MHz Step-Down Converter RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| TPS650006RTET | 功能描述:PMIC 解决方案 2.25MHz Step-Down Converter RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| TPS65000EVM-469 | 功能描述:电源管理IC开发工具 TPS65000EVM-469 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS65000RTER | 功能描述:PMIC 解决方案 2.25MHz Step-Down Converter RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
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