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参数资料
| 型号： | TPS650001RTET |
| 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： | 5/34页 |
| 文件大小： | 0K |
| 代理商： | TPS650001RTET |
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SW
VINDCDC
FB_DCDC
L
C
O
R
DC2
Z
LOAD
EN_DCDC
MODE
V
REF(DCDC)
+
-
θJA Diode
P
A
PGND
AGND
P
Oscillator
DISCHG
R
DC1
C
F
SwitchControl
(
)
(
)
DC1
DC2
DCDC
FB_DCDC
DC2
DC1
DC2
DCDC
DC2
R
+ R
V
= V
x
R
+ R
V
= 0.6V x
R
www.ti.com
SLVS810B – JUNE 2009 – REVISED AUGUST 2010
DETAILED DESCRIPTION
Step-Down Converter
The step down converter is intended to allow maximum flexibility in the end equipment. The output voltage is
user selectable with a resistor network on the output. Figure 21 illustrates the necessary connections.
Figure 21. DCDC Block Diagram and Output Voltage Setting
The output voltage of the DCDC converter is set by Equation 1:
(1)
The combined resistance of RDC1 and RDC2 should be less than 1 M.
Fixed output voltages and additional current limit options are also possible. Please contact Texas Instruments for
further information.
The step-down converter has two modes of operation to maximize efficiency at different load conditions. At
moderate to heavy load currents, the device operates in a fixed frequency pulse width modulation (PWM) mode
that results in small output ripple and high efficiency. Pulling the MODE pin to a DC high level will result in PWM
mode over the entire load range.
At light load currents, the device operates in a pulsed frequency modulation (PFM) mode to improve efficiency.
The transition to this mode occurs when the inductor current through the low-side FET becomes zero, indicating
discontinuous conduction. PFM mode also results in the output voltage increasing by 1% from its nominally set
value. This voltage positioning is intended to minimize the voltage undershoot of a load step from light to heavy
loads, as when a processor moves from sleep to active modes, and the voltage overshoot at load throw-off.
Figure 22 shows the voltage positioning behavior for a light to heavy load step.
Copyright 2009–2010, Texas Instruments Incorporated
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| TPS650061RUKT | 1.68 A SWITCHING REGULATOR, 2847 kHz SWITCHING FREQ-MAX, PQCC20 |
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| TPS650061RUKR | 1.68 A SWITCHING REGULATOR, 2847 kHz SWITCHING FREQ-MAX, PQCC20 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS650003EVM-585 | 功能描述:电源管理IC开发工具 Eval Mod for TPS650003 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 |
| TPS650003RTER | 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 |
| TPS650003RTET | 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 |
| 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 |
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