ADP5072ACBZ-R7 datasheet(21/24 Pages) AD

21 / 24 page

Data Sheet

ADP5072

Rev. 0 | Page 21 of 24

COMMON APPLICATIONS

Table 9 through Table 11 list a number of common component

selections for typical VIN, VPOS, and VNEG conditions. These

components have been bench tested and are recommended for

customer applications that are suited for these conditions. Note that

when pairing a boost and inverting regulator bill of materials,

choose the same VIN and switching frequency.

ADP5072

SW1

COMP1

RC1

102k

CC1

1nF

COMP2

RC2

61.9k

CC2

2.2nF

EN1

OFF

SYNC

SLEW

SEQ

EN2

AGND

PVIN

AVIN

CIN

10µF

VIN

+5V

FB1

PD3S140

3.3µH

VIN

+5V

VIN

+5V

6.8µF

RFB1

137k

RFT1

2.43

MΩ

VPOS

+15V

SW2

PGND

FB2

VREF

PD3S140

RFB2

118k

VNEG

–15V

CVREF

1µF

COUT1

10µF

COUT2

10µF

RFT2

2.3

2MΩ

OFF

Figure 46. Typical +5 V to ±15 V Application

Figure 46 shows the schematic referenced by Table 9 through

Table 11 with example component values for 5 V input voltage

to ±15 V output voltage generation. Table 9 shows the

components common to all of the VIN, VPOS, and VNEG

conditions.

Figure 47 shows the efficiency curves for the boost and

inverting regulator using the recommended, small size

components described in Table 9, Table 10, and Table 11

for VPOS = 15 V and VNEG = −15 V at VIN = 5 V.

100

0.001

0.01

0.1

LOAD CURRENT (A)

VPOS = +15V, 1.2MHz

VNEG = –15V, 1.2MHz

VPOS = +15V, 2.4MHz

VNEG = –15V, 2.4MHz

Figure 47. Efficiency vs. Load Current for Boost Regulator and Inverting

Regulator, TA = 25°C

Table 10 and Table 11 are based on the smallest sized components.

The maximum output current is limited by the ISAT rating of the

2 mm × 2 mm inductor. A higher output current is possible by

using larger inductors with higher ISATratings, as long as the

inductor peak current remains below the appropriate current

limit specifications.

It is important to verify the thermal performance of the small

sized inductor at higher ambient temperature in actual application.

Table 9. Recommended Common Components Selections

Reference Designator

Description

Value (µF)

Part Number

Manufacturer

CIN

Input capacitor on PVIN

GRM21BZ71C106KE15L

Murata

CVREF

VREF capacitor

GRM188R71C105KA12C

Murata

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