DCS WDI Specifications download pdf (Page 27)

LTC3375

3375fc

For more information www.linear.com/3375

applicaTions inForMaTion

Table 7. Global Buck Regulator Program Register Bit Format

Bit7 ENABLE Default is ‘0’ which disables the part. A buck regulator can also be enabled via its enable pin. When enabled via

pin, the contents of the I

C register program its functionality.

Bit6 MODE Default is ‘0’ which is Burst Mode operation. A ‘1’ programs the regulator to operate in forced continuous mode.

Bit5(PHASE1)

Bit4(PHASE0)

Phase Control Default varies per converter. ‘00’ programs a SW HIGH transition to coincide with the internal clock rising edge.

‘01’ programs a 90° offset, ’10’ programs a 180° offset, and ‘11’ programs a 270° offset.

Bit3(DAC3)

Bit2(DAC2)

Bit1(DAC1)

Bit0(DAC0)

DAC Control

These bits are used to program the feedback regulation voltage. Default is ‘1100’ which programs a voltage of

725mV. Bits ‘0000’ program the lowest feedback regulation of 425mV

, and ‘1111’ programs a full-scale voltage of

800mV. An LSB (DAC0) has a bit weight of 25mV.

Table 4. Recommended Inductors for 2A Buck Regulators

PART NUMBER L (µH) MAX I

(A) MAX DCR (mΩ)

SIZE IN mm (L × W × H)

MANUFACTURER

XFL4020-102ME 1.0 5.1 11.9

4 × 4 × 2.1

CoilCraft

74437324010 1 9 27

4.45 × 4.06 × 1.8

Wurth Elektronik

XAL4020-222ME 2.2 5.6 38.7

4 × 4 × 2.1

CoilCraft

FDV0530-2R2M 2.2 5.3 15.5

6.2 × 5.8 × 3

Toko

IHLP2020BZER2R2M-11 2.2 5 37.7

5.49 × 5.18 × 2

Vishay

XAL4030-332ME 3.3 5.5 28.6

4 × 4 × 3.1

CoilCraft

FDV0530-3R3M 3.3 4.1 34.1

6.2 × 5.8 × 3

Toko

Table 5. Recommended Inductors for 3A Buck Regulators

PART NUMBER L (µH) MAX I

(A) MAX DCR (mΩ)

SIZE IN mm (L × W × H)

MANUFACTURER

XAL4020-102ME 1.0 8.7 14.6

4 × 4 × 2.1

CoilCraft

FDV0530-1R0M 1 8.4 11.2

6.2 × 5.8 × 3

Toko

XAL5030-222ME 2.2 9.2 14.5

5.28 × 5.48 × 3.1

CoilCraft

IHLP2525CZER2R2M-01 2.2 8 20

6.86 × 6.47 × 3

Vishay

74437346022 2.2 6.5 20

7.3 × 6.6 × 2.8

Wurth Elektonik

XAL5030-332ME 3.3 8.7 23.3

5.28 × 5.48 × 3.1

CoilCraft

SPM6530T-3R3M 3 7.3 27

7.1 × 6.5 × 3

TDK

Table 6. Recommended Inductors for 4A Buck Regulators

PART NUMBER L (µH) MAX I

(A) MAX DCR (mΩ)

SIZE IN mm (L × W × H)

MANUFACTURER

XAL5030-122ME 1.2 12.5 9.4

5.28 × 5.48 × 3.1

CoilCraft

SPM6530T-1R0M120 1 14.1 7.81

7.1 × 6.5 × 3

TDK

XAL5030-222ME 2.2 9.2 14.5

5.28 × 5.48 × 3.1

CoilCraft

SPM6530T-2R2M 2.2 8.4 19

7.1 × 6.5 × 3

TDK

IHLP2525EZER2R2M-01 2.2 13.6 20.9

6.86 × 6.47 × 5

Vishay

XAL6030-332ME 3.3 8 20.81

6.36 × 6.56 × 3.1

CoilCraft

FDVE1040-3R3M 3.3 9.8 10.1

11.2 × 10 × 4

Toko

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DCS WDI Specifications Page 27

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