- 您现在的位置：买卖IC网 > PDF目录69520 > TPS62560DRVRG4 (TEXAS INSTRUMENTS INC) 0.6 A SWITCHING REGULATOR, 2250 kHz SWITCHING FREQ-MAX, PDSO6 PDF资料下载
参数资料
| 型号： | TPS62560DRVRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.6 A SWITCHING REGULATOR, 2250 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | 2 X 2 MM, 0.80 MM HEIGHT, GREEN, PLASTIC, SON-6 |
| 文件页数： | 11/30页 |
| 文件大小： | 1632K |
| 代理商： | TPS62560DRVRG4 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页当前第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页
OUT
IN
RMSC
OUT
V
1
V
1
I
V
L
f
2 3
-
=
OUT
IN
OUT
V
1
V
1
V
ESR
L
f
8
C
f
-
D
=
+
÷
è
www.ti.com
SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009
A more conservative approach is to select the inductor current rating just for the switch current limit ILIMF of the
converter.
Accepting larger values of ripple current allows the use of lower inductance values, but results in higher output
voltage ripple, greater core losses, and lower output current capability.
The total losses of the coil have a strong impact on the efficiency of the dc/dc conversion and consist of both the
losses in the dc resistance (R(DC)) and the following frequency-dependent components:
The losses in the core material (magnetic hysteresis loss, especially at high switching frequencies)
Additional losses in the conductor from the skin effect (current displacement at high frequencies)
Magnetic field losses of the neighboring windings (proximity effect)
Radiation losses
Output Capacitor Selection
The advanced fast-response voltage-mode control scheme of the TPS62560 allows the use of tiny ceramic
capacitors. Ceramic capacitors with low ESR values have the lowest output voltage ripple and are
recommended. The output capacitor requires either an X7R or X5R dielectric. Y5V and Z5U dielectric capacitors,
aside from their wide variation in capacitance over temperature, become resistive at high frequencies.
At nominal load current, the device operates in PWM mode, and the RMS ripple current is calculated as:
(3)
At nominal load current, the device operates in PWM mode, and the overall output voltage ripple is the sum of
the voltage spike caused by the output capacitor ESR plus the voltage ripple caused by charging and discharging
the output capacitor:
(4)
At light load currents, the converter operates in power-save mode, and the output voltage ripple is dependent on
the output capacitor and inductor values. Larger output capacitor and inductor values minimize the voltage ripple
in PFM mode and tighten dc output accuracy in PFM mode.
Input Capacitor Selection
An input capacitor is required for best input voltage filtering and minimizing the interference with other circuits
caused by high input voltage spikes. For most applications, a 4.7-
μF to 10-μF ceramic capacitor is
recommended. Because a ceramic capacitor loses up to 80% of its initial capacitance at 5 V, it is recommended
that 10-
μF input capacitors be used for input voltages > 4.5 V. The input capacitor can be increased without any
limit for better input voltage filtering. Take care when using only small ceramic input capacitors. When a ceramic
capacitor is used at the input and the power is being supplied through long wires, such as from a wall adapter, a
load step at the output or VIN step on the input can induce ringing at the VIN terminal. This ringing can couple to
the output and be mistaken as loop instability or could even damage the part by exceeding the maximum ratings.
Table 3. List of Capacitors
CAPACITANCE
TYPE
SIZE
SUPPLIER
4.7
μF
GRM188R60J475K
0603—1,6 × 0,8 × 0,8 mm
Murata
10
μF
GRM188R60J106M69D
0603—1,6 × 0,8 × 0,8 mm
Murata
Copyright 2008–2009, Texas Instruments Incorporated
19
相关PDF资料 |
PDF描述 |
|---|---|
| TPS62612YFD | 1.2 A SWITCHING REGULATOR, 6600 kHz SWITCHING FREQ-MAX, BGA6 |
| TPS62616YFDR | 1.2 A SWITCHING REGULATOR, 6600 kHz SWITCHING FREQ-MAX, BGA6 |
| TPS62615YFDT | 1.2 A SWITCHING REGULATOR, 6600 kHz SWITCHING FREQ-MAX, BGA6 |
| TPS62612YFDT | 1.2 A SWITCHING REGULATOR, 6600 kHz SWITCHING FREQ-MAX, BGA6 |
| TPS62612YFDR | 1.2 A SWITCHING REGULATOR, 6600 kHz SWITCHING FREQ-MAX, BGA6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS62560DRVT | 功能描述:直流/直流开关调节器 2.25MHz 600mA Step- Down Cnvrtr RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS62560DRVTG4 | 功能描述:直流/直流开关调节器 90%Efficient Synch Boost Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS62560EVM-330 | 功能描述:电源管理IC开发工具 TPS62560EVM-330 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 |
| TPS62561DDCR | 功能描述:直流/直流开关调节器 2.25MHz 600mA Step- Down Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS62561DDCT | 功能描述:直流/直流开关调节器 2.25MHz 600mA Step- Down Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
发布紧急采购，3分钟左右您将得到回复。