LTM4686BIVPBF datasheet(11/130 Pages) AD

11 / 130 page

LTM4686B

Rev. 0

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TYPICAL PERFORMANCE CHARACTERISTICS

Efficiency vs Load Current at 2.5VIN

Efficiency vs Load Current at 3.3VIN

Efficiency vs Load Current at 5VIN

Single Phase Single Output

Pulse-Skipping (Discontinuous)

Mode Efficiency

Dual Phase Single Output Load

Transient Response, 5VIN to 1VOUT

Single Phase Single Output Load

Transient Response, 5VIN to 1VOUT

Single Phase Single Output Load

Transient Response, 3.3VIN to 1VOUT

VOUT0

50mV/DIV

AC-COUPLED

IOUT

5A/DIV

40µs/DIV

FIGURE 63 CIRCUIT AT 5VIN,

0A TO 7A LOAD STEP AT 7A/µs

4686B G06

VOUT

20mV/DIV

AC-COUPLED

IOUT

5A/DIV

50µs/DIV

FIGURE 32 CIRCUIT AT 3.3VIN,

VOUT_COMMANDn SET TO 1.000V.

7A TO 14A LOAD STEP AT 7A/µs

4686B G07

Dual Output Concurrent Rail

Start-Up/Shutdown

Dual Output Start-Up/Shutdown

with a Prebiased Load

VOUT0,

VOUT1

500mV/DIV

IOUT0

5A/DIV

RUN0, RUN1

5V/DIV

2ms/DIV

FIGURE 63 CIRCUIT AT 5VIN, 80m LOAD

ON VOUT0, NO LOAD ON VOUT1.

TON_RISE0 = 3ms, TON_RISE1 = 5.297ms,

TOFF_DELAY1 = 0ms, TOFF_DELAY0 = 2.43ms,

TOFF_FALL1 = 5.328ms, TOFF_FALL0 = 3ms,

ON_OFF_CONFIGn = 0x1E

4686B G08

VOUT0, VOUT1

500mV/DIV

IDIODE

1mA/DIV

RUN0, RUN1

5V/DIV

2ms/DIV

FIGURE 63 CIRCUIT AT 5VIN, 80m LOAD ON

VOUT0, 500 ON VOUT1. VOUT1 PRE-BIASED

THROUGH A DIODE. TON_RISE0 = 3ms,

TON_RISE1 = 5.297ms, TOFF_DELAY1 = 0ms,

TOFF_DELAY0 = 2.43ms, TOFF_FALL1 = 5.328ms,

TOFF_FALL0 = 3ms, ON_OFF_CONFIG1 = 0x1F,

ON_OFF_CONFIG0 = 0x1E

4686B G09

VOUT

20mV/DIV

AC-COUPLED

IOUT

10A/DIV

50µs/DIV

FIGURE 30 CIRCUIT AT 5VIN,

VOUT_COMMANDn SET TO 1.000V.

14A TO 28A LOAD STEP AT 14A/µs

4686B G05

TA = 25°C, 5VIN to 1VOUT, switching frequency set

per Table 7, unless otherwise noted.

OUTPUT CURRENT (A)

100

4686B G01

1.8VOUT

1.5VOUT

1.2VOUT

1VOUT

0.9VOUT

0.8VOUT

0.7VOUT

0.6VOUT

OUTPUT CURRENT (A)

100

4686B G02

2.5VOUT

1.8VOUT

1.5VOUT

1.2VOUT

1VOUT

0.9VOUT

0.8VOUT

0.7VOUT

0.6VOUT

3.3VOUT

2.5VOUT

1.8VOUT

1.5VOUT

1.2VOUT

1VOUT

0.9VOUT

0.8VOUT

0.7VOUT

0.6VOUT

OUTPUT CURRENT (A)

100

4686B G03

MFR_PWM_MODEn[0] = 0b

OUTPUT CURRENT (A)

4686B G04

5VIN TO 1.5VOUT, 1MHz

VIN = SVIN = VINn = INTVCC

LTM4686BIVPBF Datasheet(PDF) 11 Page - Analog Devices

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