EVAL6725 Datasheet EVAL6725 | P1-P3

Data Brief

January 2007 Rev 1 1/5

For further information contact your local STMicroelectronics sales office.

EVAL6725

L6725: 20A Demoboard

General description

L6725 demoboard realizes in a four layer PCB a step-down DC/DC converter and shows the

operation of the device in a general purpose application. The input voltage can range from

4.5 V to 14 V and the output voltage is at 3.3 V. The module can deliver an output current in

excess of 20 A. The switching frequency is set at 250 KHz (controller free-running F

) but

it can be set to 500 KHz acting on the EAREF pin.

Demoboard picture

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Features EVAL6725

2/5

1 Features

Figure 1. Demoboard schematic

Table 1. Demoboard part list

Reference Value Manufacturer Package Supplier

R1 1 kΩ Neohm SMD 0603 IFARCAD

R2 1 kΩ Neohm SMD 0603 IFARCAD

R3 4. 7kΩ

R4 2.7 kΩ Neohm SMD 0603 IFARCAD

R5 0 Ω Neohm SMD 0603 IFARCAD

R6 N.C. Neohm SMD 0603 IFARCAD

R7 2 kΩ Neohm SMD 0603 IFARCAD

R8 10 Ω Neohm SMD 0603 IFARCAD

R9 1.5 kΩ Neohm SMD 0603 IFARCAD

R10 2.2 Ω Neohm SMD 0603 IFARCAD

R11 2.2 Ω Neohm SMD 0603 IFARCAD

R12 N.C. Neohm SMD 0603 IFARCAD

C1 4.7 nF Kemet SMD 0603 IFARCAD

C2 47 nF Kemet SMD 0603 IFARCAD

C3 1 nF Kemet SMD 0603 IFARCAD

C4 100 nF Kemet SMD 0603 IFARCAD

C5 100 nF Kemet SMD 0603 IFARCAD

Q1-3

Q4-6

L6725

VIN

VOUT

OCH

C11

GOUT

HGATE

PHASE

LGATE

PGND

VCC

BOOT

VCCDR

C10

VFB

COMP

EAREF

GND

GIN

OCL

R10

R11

C12-C13

C16-C19

R12

C15

EXT REF

EVAL6725 Features

3/5

C6 N.C. / / /

C7 100 nF Kemet SMD 0603 IFARCAD

C8 4.7 µF 20 V AVX SMA6032 IFARCAD

C9 1 nF Kemet SMD 0603 IFARCAD

C10 1 µF Kemet SMD 0603 IFARCAD

C11 220 nF Kemet SMD 0603 IFARCAD

C12-13 3X 15 µF / / ST (TDK)

C15 N.C. / / /

C16-19 2X 330 µF / / ST (poscap)

L1 1.8 µH Panasonic SMD ST

D1 STPS1L30M ST DO216AA ST

D3 N.C. / / /

Q1-Q2 STS12NH3LL ST SO8 ST

Q4-Q5 STS25NH3LL ST SO8 ST

U1 L6725 ST SO16N ST

Table 2. Other inductor manufacturer

Manufacturer Series Inductor value (µH) Saturation current (A)

WURTH ELEKTRONIC 744318180 1.8 20

SUMIDA CDEP134-2R7MC-H 2.7 15

EPCOS HPI_13 T640 1.4 22

TDK SPM12550T-1R0M220 1 22

TOKO FDA1254 2.2 14

COILTRONICS

HCF1305-1R0 1.15 22

HC5-1R0 1.3 27

Table 3. Other capacitor manufacturer

Manufacturer Series Capacitor value(µF) Rated voltage (V)

TDK

C4532X5R1E156M 15 25

C3225X5R0J107M 100 6.3

NIPPON CHEMI-CON 25PS100MJ12 100 25

PANASONIC ECJ4YB0J107M 100 6.3

Table 1. Demoboard part list (continued)

Reference Value Manufacturer Package Supplier

P1-P3 P4-P5

EVAL6725

Mfr. #:

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Manufacturer:

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Description:

EVAL BOARD FOR L6725

Lifecycle:

New from this manufacturer.

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EVAL6725