LTM4644 datasheet(5/36 Pages) LINER

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LTM4650A-1

4650a1f

For more information www.linear.com/LTM4650A-1

TYPICAL PERFORMANCE CHARACTERISTICS

Burst Mode and Pulse-Skip Mode

Efficiency VIN=12V, VOUT = 1.2V,

fS = 400kHz

1V Dual Phase Single Output

Load Transient Response

(Ceramic Output Capacitor Only)

Efficiency vs Output Current,

VIN = 5V

Efficiency vs Output Current,

VIN = 12V

LOAD CURRENT (A)

100

4650a1 G01

2.5VOUT, 500kHz

3.3VOUT, 600kHz

1.8VOUT, 500kHz

1.5VOUT, 400kHz

1.2VOUT, 400kHz

1.0VOUT, 300kHz

LOAD CURRENT (A)

100

4650a1 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

4650a1 G03

CCM

PULSE-SKIP MODE

Burst Mode OPERATION

VOUT(AC)

50mV/DIV

LOAD STEP

10A/DIV

100µs/DIV

4650a1 G04

12VIN, 1VOUT, 300kHz,

DUAL PHASE SINGLE OUTPUT

25%, 12.5A LOAD STEP-UP AND

STEP-DOWN, 10A/ s SLEW RATE

COUT = 8× 220F CERAMIC CAP

RTH = 3.32k, CTH = 6800pF, CFF = 68pF

1.2V Dual Phase Single Output

Load Transient Response

(Ceramic Output Capacitor Only)

1.5V Dual Phase Single Output

Load Transient Response

(Ceramic Output Capacitor Only)

VOUT(AC)

50mV/DIV

LOAD STEP

10A/DIV

100µs/DIV

4650a1 G05

12VIN, 1.2VOUT, 400kHz,

DUAL PHASE SINGLE OUTPUT

25%, 12.5A LOAD STEP-UP AND

STEP-DOWN, 10A/ s SLEW RATE

COUT = 8× 220F CERAMIC CAP

RTH = 3.32k, CTH = 6800pF, CFF = 68pF

VOUT(AC)

50mV/DIV

LOAD STEP

10A/DIV

100µs/DIV

4650a1 G06

12VIN, 1.5VOUT, 400kHz,

DUAL PHASE SINGLE OUTPUT

25%, 12.5A LOAD STEP-UP AND

STEP-DOWN, 10A/ s SLEW RATE

COUT = 8× 220F CERAMIC CAP

RTH = 3.32k, CTH = 6800pF, CFF = 68pF

1.8V Dual Phase Single Output

Load Transient Response

(Ceramic Output Capacitor Only)

2.5V Dual Phase Single Output

Load Transient Response

(Ceramic Output Capacitor Only)

VOUT(AC)

50mV/DIV

LOAD STEP

10A/DIV

100µs/DIV

4650a1 G07

12VIN, 1.8VOUT, 500kHz,

DUAL PHASE SINGLE OUTPUT

25%, 12.5A LOAD STEP-UP AND

STEP-DOWN, 10A/ s SLEW RATE

COUT = 8× 220F CERAMIC CAP

RTH = 3.32k, CTH = 6800pF, CFF = 68pF

VOUT(AC)

50mV/DIV

LOAD STEP

10A/DIV

100µs/DIV

4650a1 G08

12VIN, 2.5VOUT, 500kHz,

DUAL PHASE SINGLE OUTPUT

25%, 12.5A LOAD STEP-UP AND

STEP-DOWN, 10A/ s SLEW RATE

COUT = 8× 220F CERAMIC CAP

RTH = 3.32k, CTH = 6800pF, CFF = 68pF

3.3V Dual Phase Single Output

Load Transient Response

(Ceramic Output Capacitor Only)

VOUT(AC)

50mV/DIV

LOAD STEP

10A/DIV

100µs/DIV

4650a1 G09

12VIN, 3.3VOUT, 600kHz,

DUAL PHASE SINGLE OUTPUT

25%, 12.5A LOAD STEP-UP AND

STEP-DOWN, 10A/ s SLEW RATE

COUT = 8× 220F CERAMIC CAP

RTH = 3.32k, CTH = 6800pF, CFF = 68pF

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