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ZHCSA37B August 2012 – August 2019 TPS63036

PRODUCTION DATA.

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- MXBG085C

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8.2.2 Detailed Design Procedure

The design guideline provides a component selection to operate the device within the recommended operating conditions.

Table 1 shows the list of components for the Application Curves.

Table 1. List of Components

REFERENCE	DESCRIPTION	MANUFACTURER
	TPS63036	Texas Instruments
L1	1.5 μH, 3 mm x 3 mm x 1.5 mm	Coilcraft, LPS3015-152MLC
C1	10 μF 6.3V, 0603, X7R ceramic	GRM188R60J106KME84D, Murata
C2	3 × 10 μF 6.3V, 0603, X7R ceramic	GRM188R60J106KME84D, Murata
R1, R2	Depending on the output voltage at TPS63036

The TPS63036 buck-boost converter has internal loop compensation. Therefore, the external L-C filter has to be selected to work with the internal compensation. As a general rule of thumb, the product L × C should not move over a wide range when selecting a different output filter. However, when selecting the output filter a low limit for the inductor value exists to avoid sub-harmonic oscillation which could be caused by a far too fast ramp up of the amplified inductor current. For the TPS63036 the minimum inductor value should be kept at 1 uH. To simplify this process Table 1 outlines possible inductor and capacitor value combinations.

Table 2. Output Filter Selection (Average Inductance Current up to 1 A)

INDUCTOR VALUE [µH]⁽¹⁾	OUTPUT CAPACITOR VALUE [µF]⁽²⁾
INDUCTOR VALUE [µH]⁽¹⁾	30	44	66
1.0	√	√	√
1.5	√⁽³⁾	√	√
2.2			√

(1) Inductor tolerance and current de-rating is anticipated. The effective inductance can vary by 20% and –30%.

(2) Capacitance tolerance and bias voltage de-rating is anticipated. The effective capacitance can vary by 20% and –50%.

(3) Typical application. Other check mark indicates recommended filter combinations