LTC3788EUHPBF(RevA) View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC3788EUHPBF
(Rev.:RevA)

2-Phase, Dual Output Synchronous Boost Controller

Linear Technology 

TYPICAL PERFORMANCE CHARACTERISTICS

LTC3788

Efficiency and Power Loss

vs Output Current

100

10000

90

80

1000

70

60

100

50

40

10

30

20

10

0

0.01

VIN = 12V

1

VOUT = 24V

FIGURE 9 CIRCUIT

0.1

0.1

1

10

OUTPUT CURRENT (A)

BURST EFFICIENCY

PULSE-SKIPPING

EFFICIENCY

CCM EFFICIENCY

3788 G01

BURST LOSS

PULSE-SKIPPING

LOSS

CCM LOSS

Efficiency vs Input Voltage

100

ILOAD = 2A

99 FIGURE 9 CIRCUIT

98

97 VOUT = 12V

96

VOUT = 24V

95

94

93

92

91

90

0

5

10

15

20

INPUT VOLTAGE (V)

25

3788 G03

Load Step

Burst Mode Operation

Efficiency and Power Loss

vs Output Current

100

10000

90

80

1000

70

60

100

50

40

10

30

20

10

0

0.00001 0.0001 0.001

VIN = 12V

1

VOUT = 24V

Burst Mode OPERATION

FIGURE 9 CIRCUIT

0.1

0.01 0.1 1 10

OUTPUT CURRENT (A)

3788 G02

BURST EFFICIENCY

BURST LOSS

Load Step

Forced Continuous Mode

LOAD STEP

2A/DIV

INDUCTOR

CURRENT

5A/DIV

VOUT

500mV/DIV

VIN = 12V

200μs/DIV

VOUT = 24V

FIGURE 9 CIRCUIT

Load Step

Pulse-Skipping Mode

3788 G04

LOAD STEP

2A/DIV

INDUCTOR

CURRENT

5A/DIV

VOUT

500mV/DIV

LOAD STEP

2A/DIV

INDUCTOR

CURRENT

5A/DIV

VOUT

500mV/DIV

VIN = 12V

200μs/DIV

VOUT = 24V

FIGURE 9 CIRCUIT

3788 G05

VIN = 12V

200μs/DIV

VOUT = 24V

FIGURE 9 CIRCUIT

3788 G06

3788fa

5

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