LTP8800-1A

15

Rev. B

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Figure 11. 0.75V 150A 1MHz Step-Down μModule with Unity Gain for Faster Transient Response

TYPICAL APPLICATIONS

3.3k

3.3k

5k

10k

VIN

SYNC

CTRL

SDA

SMBALERT

SMBALERT

SCL

C1

47µF

C2

4.7µF

3V3

SCL

SDA

ON/OFF CTRL

SYNC CLOCK

LTP8800-1A

88001a F11

7V0

3V3

VIN

45V TO 65V

7V

3V3

GND

210Ω

ADD

ISHARE

C5: EEFGX0D561R

C4: GRM32EC70G107ME15L

C3: C1608X7S0J106M080AC

C1: EEE-FK2A470AQ

C2: GRM31CC72A475KE11L

499Ω

VS–

VS+

VOUT

VOUT

0.75V

150A

C3

10µF

×18

100pF

7.5Ω

C4

100µF

×8

C5

560µF

×10

Utilizing unity gain provides better DC accuracy and

transient response. See Compensation Section for

determining PID settings for optimal loop response.

LTP8800-1A  requires the following registers to be

adjusted for correct output voltage are listed in Table 3.

Table 3. Unity Gain Application PMBus Commands

REGISTER OFFSETS

ADI FACTORY SETTINGS

UNITY GAIN APPLICATION SETTINGS

VOUT_COMMAND (0x21h)

0x3000h

0x3000h

VOUT_SCALE_LOOP (0x29h)

0xB2A6h

0xBA00h

VOUT_SCALE_MONITOR (0x2Ah)

0xB2A6h

0xBA00h