SLVSB71E February 2012 – September 2016 TLV62150 , TLV62150A
PRODUCTION DATA.
The inductor selection is affected by several effects like inductor ripple current, output ripple voltage, PWM-to-PSM transition point and efficiency. In addition, the inductor selected has to be rated for appropriate saturation current and DC resistance (DCR). Equation 7 and Equation 8 calculate the maximum inductor current under static load conditions.
spacing
where
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Calculating the maximum inductor current using the actual operating conditions gives the minimum saturation current of the inductor needed. A margin of about 20% is recommended to add. A larger inductor value is also useful to get lower ripple current, but increases the transient response time and size as well. The following inductors have been used with the TLV62150 and are recommended for use:
Type | Inductance [µH] | Saturation Current [A]^{(1)} | Dimensions [L x B x H] mm | MANUFACTURER^{(2)} |
---|---|---|---|---|
XFL4020-222ME_ | 2.2 µH, ±20% | 3.5 | 4 × 4 × 2.1 | Coilcraft |
XFL3012-222MEC | 2.2 µH, ±20% | 1.6 | 3 × 3 × 1.2 | Coilcraft |
XFL3012-332MEC | 3.3 µH, ±20% | 1.4 | 3 × 3 × 1.2 | Coilcraft |
VLS252012T-2R2M1R3 | 2.2 µH, ±20% | 1.3 | 2.5 × 2 × 1.2 | TDK |
LPS3015-332 | 3.3 µH, ±20% | 1.4 | 3 × 3 × 1.4 | Coilcraft |
744025003 | 3.3 µH, ±20% | 1.5 | 2.8 × 2.8 × 2.8 | Wuerth |
PSI25201B-2R2MS | 2.2 µH, ±20% | 1.3 | 2 × 2.5 × 1.2 | Cyntec |
NR3015T-2R2M | 2.2 µH, ±20% | 1.5 | 3 × 3 × 1.5 | Taiyo Yuden |
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The inductor value also determines the load current at which Power Save Mode is entered:
Using Equation 8, this current level can be adjusted by changing the inductor value.