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参数资料
| 型号： | TPS61093DSK |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 2.50 X 2.50 MM, 0.80 MM HEIGHT, PLASTIC, SON-10 |
| 文件页数： | 4/23页 |
| 文件大小： | 760K |
| 代理商： | TPS61093DSK |
L
L_peak
L_DC
L
SW
I
= I
+
2
Vout
Iout
I
=
Vin
1
I =
1
L
+
Vout + 0.8 V
VIN
D
h
D
é
ù
ê
ú
÷
-
è
out
ripple
D
I
C
=
Fs
V
SLVS992A – SEPTEMBER 2009 – REVISED NOVEMBER 2009
www.ti.com
(5)
Where
IL_peak = Peak switch current
IL_DC = Inductor average current
ΔIL = Inductor peak to peak current
η = Estimated converter efficiency
Normally, it is advisable to work with an inductor peak-to-peak current of less than 30% of the average inductor
current. A smaller ripple from a larger valued inductor reduces the magnetic hysteresis losses in the inductor and
EMI. But in the same way, load transient response time is increased. Also, the inductor value should not be
outside the 2.2-
μH to 10-μH range in the recommended operating conditions table. Otherwise, the internal slope
compensation and loop compensation components are unable to maintain small signal control loop stability over
the entire load range. Table 1 lists the recommended inductor for the TPS61093.
Table 1. Recommended Inductors for the TPS61093
L
DCR MAX
SATURATION
PART NUMBER
SIZE (L×W×H mm)
VENDOR
(
μH)
(m
)
CURRENT (A)
#A915_Y-4R7M
4.7
45
1.5
5.2x5.2x3.0
Toko
#A915_Y-100M
10
90
1.09
5.2x5.2x3.0
Toko
VLS4012-4R7M
4.7
132
1.1
4.0x4.0x1.2
TDK
VLS4012-100M
10
240
0.82
4.0x4.0x1.2
TDK
CDRH3D23/HP
10
198
1.02
4.0x4.0x2.5
Sumida
LPS5030-103ML
10
127
1.4
5.0x5.0x3.0
Coilcraft
INPUT AND OUTPUT CAPACITOR SELECTION
The output capacitor is mainly selected to meet the requirements for output ripple and loop stability. This ripple
voltage is related to the capacitor’s capacitance and its equivalent series resistance (ESR). Assuming a ceramic
capacitor with zero ESR, the minimum capacitance needed for a given ripple can be calculated by:
(6)
Where Vripple = peak to peak output ripple. The ESR impact on the output ripple must be considered if tantalum
or electrolytic capacitors are used.
Care must be taken when evaluating a ceramic capacitor’s derating under dc bias, aging, and ac signal. For
example, larger form factor capacitors (in 1206 size) have their self resonant frequencies in the range of the
switching frequency. So the effective capacitance is significantly lower. The dc bias can also significantly reduce
capacitance. A ceramic capacitor can lose as much as 50% of its capacitance at its rated voltage. Therefore,
always leave margin on the voltage rating to ensure adequate capacitance at the required output voltage.
A 4.7-
μF (minimum) input capacitor is recommended. The output requires a capacitor in the range of 1 μF to 10
μF. The output capacitor affects the small signal control loop stability of the boost regulator. If the output
capacitor is below the range, the boost regulator can potentially become unstable.
The popular vendors for high value ceramic capacitors are:
12
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): TPS61093
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| TPS61093DSKR | 功能描述:直流/直流开关调节器 Low In 20V/1.1A Step Up DC/DC 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 |
| TPS61093DSKT | 功能描述:直流/直流开关调节器 Low In 20V/1.1A Step Up DC/DC 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 |
| TPS61093DSKT | 制造商:Texas Instruments 功能描述:Switching Regulator IC 制造商:Texas Instruments 功能描述:IC, STEP-UP DC/DC CONVERTER, SON-10 |
| TPS61093EVM-519 | 功能描述:电源管理IC开发工具 TPS61093EVM-519 Eval 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 |
| TPS61093QDSKRQ1 | 功能描述:Boost Switching Regulator IC Positive Adjustable 1.6V 1 Output 900mA (Switch) 10-WFDFN Exposed Pad 制造商:texas instruments 系列:汽车级，AEC-Q100 包装:剪切带（CT） 零件状态:有效 功能:升压 输出配置:正 拓扑:升压 输出类型:可调式 输出数:1 电压 - 输入（最小值）:1.6V 电压 - 输入（最大值）:6V 电压 - 输出（最小值/固定）:1.6V 电压 - 输出（最大值）:17V 电流 - 输出:900mA（开关） 频率 - 开关:1.2MHz 同步整流器:无 工作温度:-40°C ~ 125°C（TA） 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商器件封装:10-SON（2.5x2.5） 标准包装:1 |
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