8.2.2.5.3 Recommended Transformers

Depending on the application, use the minimum configuration in Figure 8-6 or standard configuration in Figure

8-7.

1 F

µ

V

IN

MBR0520L

MBR0520L

T1

3

1

SN6501

5

2

4

TP1

0.1µF

D2

D1

V

CC

GND

GND

Figure 8-6. Unregulated Output for Low-Current

Loads With Wide Supply Range

Figure 8-7. Regulated Output for Stable Supplies

and High Current Loads

The Wurth Electronics Midcom isolation transformers in Table 8-3 are optimized designs for the SN6501,

providing high efficiency and small form factor at low-cost.

The 1:1.1 and 1:1.7 turns-ratios are designed for logic applications with wide supply rails and low load currents.

These applications operate without LDO, thus achieving further cost-reduction.

Table 8-3. Recommended Isolation Transformers Optimized for SN6501

Turns

Ratio

V x T

(Vμs)

Isolation

(VRMS)

Dimensions

(mm)

Application

LDO

Figures

Order No.

Manufacturer

1:1.1 ±2%

7

2500

6.73 x 10.05 x 4.19

3.3 V → 3.3 V

No

Figure 5-1

Figure 5-2

760390011

Wurth

Electronics/

Midcom

1:1.1 ±2%

11

5 V → 5 V

Figure 5-3

Figure 5-4

760390012

1:1.7 ±2%

3.3 V → 5 V

Figure 5-5

Figure 5-6

760390013

1:1.3 ±2%

3.3 V → 3.3 V

5 V → 5 V

Yes

Figure 5-7

Figure 5-8

Figure 5-9

Figure 5-10

760390014

1:2.1 ±2%

3.3 V → 5 V

Figure 5-11

Figure 5-12

760390015

1.23:1 ±2%

5 V → 3.3 V

Figure 5-13

Figure 5-14

750313710

1:1.1 ±2%

11

5000

9.14 x 12.7 x 7.37

3.3 V → 3.3 V

No

Figure 5-15

Figure 5-16

750313734

1:1.1 ±2%

5 V → 5 V

Figure 5-17

Figure 5-18

750313734

1:1.7 ±2%

3.3 V → 5 V

Figure 5-19

Figure 5-20

750313769

1:1.3 ±2%

3.3 V → 3.3 V

5 V → 5 V

Yes

Figure 5-21

Figure 5-22

Figure 5-23

Figure 5-24

750313638

1:2.1 ±2%

3.3 V → 5 V

Figure 5-25

Figure 5-26

750313626

1.3:1 ±2%

5 V → 3.3 V

Figure 5-27

Figure 5-28

750313638

1:1.3 ±3%

11

5000

10.4 x 12.2 x 6.1

3.3 V → 3.3 V

5 V → 5 V

No

N/A

HCT-SM-1.3-8-2

Bourns

1:1.1 ±2%

9.2

2500

7.01 x 11 x 4.19

3.3 V → 3.3 V

5 V → 5 V

No

N/A

EPC3668G-LF

PCA Electronics

www.ti.com

SN6501

SLLSEA0I – FEBRUARY 2012 – REVISED JANUARY 2021

Copyright © 2021 Texas Instruments Incorporated

Submit Document Feedback

21

Product Folder Links: SN6501