LTP8803-1A

15

Rev. 0

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Figure 11. 1.15V 160A 600kHz Step-Down μModule with Unity Gain for Faster Transient Response

3.3k

3.3k

5k

10k

VIN

SYNC

CTRL

SDA

SMBALERT

SMBALERT

SCL

VS–

VS+

VOUT

C1

47µF

C2

4.7µF

3V3

SCL

SDA

ON/OFF CTRL

SYNC CLOCK

LTP8803-1A

88031a F11

7V0

3V3

VIN

45V TO 65V

7V

3V3

GND

VOUT

1.15V

160A

C3

10µF

×18

210Ω

1.00k

100pF

ADD

7.5Ω

C4

100µF

×8

C5

560µF

×10

ISHARE

C5: 560 F EEFGX0D561R

C4: GRM32EC80J107ME20L

C3: C1608X7S0J106M080AC

C1: EEEFK2A220P

C2: GRM31CR72A225KA73L

TYPICAL APPLICATION

Utilizing unity gain provides better DC accuracy and

transient response. See Compensation section for

determining PID settings for optimal loop response.

LTP8803-1A requires the following registers to be adjusted

for correct output voltage and are listed in Table 3.

Table 3. Unity Gain Application PMBus Commands

REGISTER OFFSETS

ADI FACTORY SETTINGS

UNITY GAIN APPLICATION SETTINGS

VOUT_COMMAND (0x21h)

0x499Ah

0x499Ah

VOUT_SCALE_LOOP (0x29h)

0xAB7Ah

0xBA00h

VOUT_SCALE_MONITOR (0x2Ah)

0xAB7Ah

0xBA00h