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參數(shù)資料
| 型號： | TPS62562DRVR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.6 A SWITCHING REGULATOR, 2250 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | 2 X 2 MM, 0.80 MM HEIGHT, GREEN, PLASTIC, SON-6 |
| 文件頁數(shù)： | 10/30頁 |
| 文件大?。?/td> | 1664K |
| 代理商： | TPS62562DRVR |
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1
OUT
REF
2
R
V
1
R
=
+
÷
è
DIL + VOUT
1 *
V
OUT
V
IN
L
f
I
L max + Iout max )
DIL
2
SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009
www.ti.com
OUTPUT VOLTAGE SETTING
For adjustable output voltage versions, the output voltage can be calculated as:
with an internal reference voltage VREF, typically 0.6 V.
To minimize the current through the feedback divider network, R2 should be 180 k or 360 k. The sum of R1
and R2 should not exceed ~1 M, to keep the network robust against noise. An external feed-forward capacitor,
C1, is required for optimum load transient response. The value of C1 should be in the range between 22 pF and
33 pF.
In case of using the fixed output voltage version (TPS62562), Vout has to be connected to the feedback pin FB.
Route the FB line away from noise sources, such as the inductor or the SW line.
OUTPUT FILTER DESIGN (INDUCTOR AND OUTPUT CAPACITOR)
The TPS62560 is designed to operate with inductors in the range of 1.5
μH to 4.7 μH and with output capacitors
in the range of 4.7
μF to 22 μF. The part is optimized for operation with a 2.2-μH inductor and 10-μF output
capacitor.
Larger or smaller inductor values can be used to optimize the performance of the device for specific operation
conditions. For stable operation, the L and C values of the output filter may not fall below 1
μH effective
inductance and 3.5
μF effective capacitance.
Inductor Selection
The inductor value has a direct effect on the ripple current. The selected inductor must be rated for its dc
resistance and saturation current. The inductor ripple current (
ΔIL) decreases with higher inductance and
increases with higher VIN or VOUT.
The inductor selection also impacts the output voltage ripple in PFM mode. Higher inductor values lead to lower
output voltage ripple and higher PFM frequency; lower inductor values lead to a higher output voltage ripple but
lower PFM frequency.
Equation 1 calculates the maximum inductor current in PWM mode under static load conditions. The saturation
current of the inductor should be rated higher than the maximum inductor current as calculated with Equation 2.
This is recommended because during heavy load transients the inductor current rises above the calculated
value.
(1)
(2)
where:
f = Switching frequency (2.25 MHz, typical)
L = Inductor value
ΔIL = Peak-to-peak inductor ripple current
ILmax = Maximum inductor current
Table 2. List of Inductors
DIMENSIONS, mm
INDUCTANCE,
μH
INDUCTOR TYPE
SUPPLIER
2,5 × 2 × 1 max
2
MIPS2520D2R2
FDK
2,5 × 2 × 1,2 max
2
MIPSA2520D2R2
FDK
2,5 × 2 × 1 max
2.2
KSLI-252010AG2R2
Hitachi Metals
2,5 × 2 × 1,2 max
2.2
LQM2HPN2R2MJ0L
Murata
3 × 3 × 1,5 max
2.2
LPS3015 2R2
Coilcraft
18
Copyright 2008–2009, Texas Instruments Incorporated
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| TPS62562DRVT | 功能描述:直流/直流開關調(diào)節(jié)器 2.25MHz 600mA Step- Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62590DRVR | 功能描述:直流/直流開關調(diào)節(jié)器 2.25MHz 1A Step-Down Cnvrtr RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62590DRVT | 功能描述:直流/直流開關調(diào)節(jié)器 2.25MHz 1A Step-Down Cnvrtr RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62590EVM-454 | 功能描述:電源管理IC開發(fā)工具 TPS62590EVM-454 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)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 |
| TPS62590TDRVRQ1 | 功能描述:直流/直流開關調(diào)節(jié)器 AC 2.25MHz 600mA Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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