The output voltage is set using the external resistive divider R1and R2.The output voltage is given by the formula:V OUT =V ADJ x (1+(R1/R2))(1)It is recommended that the values selected for R1and R2are such that the parallel value is less than 1.00k Ω.This is to prevent ...
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文件页数/大小:26 页 / 296 K 品牌: ONSEMI [ ONSEMI ] Procedure (Adjustable Output Version: LM2574−ADJ) Example ƪ ƫ A.Use the following formula to calculate the inductor Volt x 1000 ƪ ƫ +105 V xms x ƪ ƫ V xms ...
lowing formula: Internal Compensation The LM22680 has internal compensation designed for a sta- ble loop with a wide range of external power stage compo- nents. Insuring stability of a design with a specific power stage (in- ductor and output capacitor) can be tricky. The LM22680 ...
The output voltage is set using resistors R1 and R2 (see Basic Application Circuit). The formula for output voltage is: VOUT = VADJ x (1 + (R1 / R2)) CFF should be selected to place the pole zero pair at a frequency where the net phase lead added to the loop at the cro...
1 Publication Order Number:NCP1086/D NCP1086 1.5 A Adjustable and 3.3 V Fixed Output Linear Regulator The NCP1086 linear regulator provides 1.5 A at 3.3 V or adjustable output voltage. The adjustable output voltage device uses two external resistors to set the output voltage within a 1...
Solid Tantalum Sprague 594D series COUT = 33-μF, 25-V, Solid Tantalum Sprague 594D series D1 = 1-A, 40-V Schottky Rectifier, Surface Mount L1 = 100-μH, L20, Coilcraft DO3316 CB = 0.01-μF, 50-V Ceramic R1 = 1k, 1% R2 = Use formula in Detailed Design Procedure Figure 29...
Programming Output Voltage To select the right programming resistor R1 and R2 value (see Figure 1) use the following formula: 1. Programming Output Voltage (selecting R1 and R2) Select R1 and R2: ǒ Ǔ R2 1.0 ) V out + V ref R1 ǒ V out + 1.23 1.0 ) ǒ where Vref = 1.23 V ...
R2. The output voltage is given by the formula: A capacitor placed across R1 can provide some additional phase margin and improve transient response. The capacitor CFF and R1 form a zero in the loop response given by the formula: VOUT = VADJ x (1 + R1 / R2) The value of ...
Toselect the right programming resistor R1 and R2 value (see R1 V V V 1.8 k R2 R1 Resistor R1 can be between 1.0 k and 5.0 kΩ. (For best temperature coefficient and stability with time, use 1% metal V 1.23 V R2 = 9.91 kΩ, choose a 9.88 k metal film resistor. ...