LTM4644 datasheet(6/38 Pages) LINER

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LTM4650A

4650afb

For more information www.linear.com/LTM4650A

TYPICAL PERFORMANCE CHARACTERISTICS

Burst Mode and Pulse-Skip Mode

Efficiency VIN=12V, VOUT = 1.2V,

fS = 300kHz

1V Dual Phase Single Output

Load Transient Response

(Ceramic Cap)

Efficiency vs Output Current,

VIN = 5V

Efficiency vs Output Current,

VIN = 12V

1.2V Dual Phase Single Output

Load Transient Response

(Ceramic Cap)

1.5V Dual Phase Single Output

Load Transient Response

(Ceramic Cap)

1.8V Dual Phase Single Output

Load Transient Response

(Ceramic Cap)

2.5V Dual Phase Single Output

Load Transient Response

(Ceramic Cap)

3.3V Dual Phase Single Output

Load Transient Response

(Ceramic Cap)

LOAD CURRENT (A)

100

4650A G01

2.5VOUT, 500kHz

3.3VOUT, 600kHz

1.8VOUT, 500kHz

1.5VOUT, 400kHz

1.2VOUT, 400kHz

1.0VOUT, 300kHz

LOAD CURRENT (A)

100

4650A G02

2.5VOUT, 500kHz

3.3VOUT, 600kHz

1.8VOUT, 500kHz

5.0VOUT, 750kHz

1.5VOUT, 400kHz

1.2VOUT, 400kHz

1.0VOUT, 300kHz

LOAD CURRENT (mA)

0.01

0.1

100

4650A G03

CCM

PULSE-SKIP MODE

Burst Mode OPERATION

VOUT (AC)

50mV/DIV

LOAD STEP

10A/DIV

50µs/DIV

4650A G04

12VIN, 1VOUT, 300kHz,

DUAL PHASE SINGLE OUTPUT

25%, 12.5A LOAD STEP-UP AND

STEP-DOWN, 10A/ s SLEW RATE

COUT = 16× 100F CERAMIC CAP

CFF = 47pF

VOUT (AC)

50mV/DIV

LOAD STEP

10A/DIV

50µs/DIV

4650A G05

12VIN, 1.2VOUT, 400kHz,

DUAL PHASE SINGLE OUTPUT

25%, 12.5A LOAD STEP-UP AND

STEP-DOWN, 10A/ s SLEW RATE

COUT = 16× 100F CERAMIC CAP

CFF = 47pF

VOUT (AC)

50mV/DIV

LOAD STEP

10A/DIV

50µs/DIV

4650A G06

12VIN, 1.5VOUT, 400kHz,

DUAL PHASE SINGLE OUTPUT

25%, 12.5A LOAD STEP-UP AND

STEP-DOWN, 10A/ s SLEW RATE

COUT = 16× 100F CERAMIC CAP

CFF = 47pF

VOUT (AC)

50mV/DIV

LOAD STEP

10A/DIV

50µs/DIV

4650A G07

12VIN, 1.8VOUT, 500kHz,

DUAL PHASE SINGLE OUTPUT

25%, 12.5A LOAD STEP-UP AND

STEP-DOWN, 10A/ s SLEW RATE

COUT = 16× 100F CERAMIC CAP

CFF = 47pF

VOUT (AC)

50mV/DIV

LOAD STEP

10A/DIV

50µs/DIV

4650A G08

12VIN, 2.5VOUT, 500kHz,

DUAL PHASE SINGLE OUTPUT

25%, 12.5A LOAD STEP-UP AND

STEP-DOWN, 10A/ s SLEW RATE

COUT = 16× 100F CERAMIC CAP

CFF = 47pF

VOUT (AC)

100mV/DIV

LOAD STEP

10A/DIV

50µs/DIV

4650A G09

12VIN, 3.3VOUT, 600kHz,

DUAL PHASE SINGLE OUTPUT

25%, 12.5A LOAD STEP-UP AND

STEP-DOWN, 10A/ s SLEW RATE

COUT = 16× 100F CERAMIC CAP

CFF = 47pF

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