LTM4627EVPBF datasheet(6/28 Pages) LINER

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LTM4627

4627f

TYPICAL PERFORMANCE CHARACTERISTICS

Start-Up with Soft-Start

Short-Circuit Protection No Load

Short-Circuit Protection 15A Load

PIN FUNCTIONS

VIN (A1-A6, B1-B6, C1-C6): Power Input Pins. Apply input

voltage between these pins and GND pins. Recommend

placing input decoupling capacitance directly between VIN

pins and GND pins.

VOUT (J1-J10, K1-K11, L1-L11, M1-M11): Power Output

Pins. Apply output load between these pins and GND

pins. Recommend placing output decoupling capacitance

directly between these pins and GND pins. Review Table 4.

GND (B7, B9, C7, C9, D1-D6, D8, E1-E7, E9, F1-F9, G1-G9,

H1-H9): Power Ground Pins for Both Input and Output

Returns.

PGOOD (F11, G12): Output Voltage Power Good Indicator.

Open-drain logic output that is pulled to ground when the

output voltage exceeds a ±10% regulation window. Both

pins are tied together internally.

SGND (G11, H11, H12): Signal Ground Pin. Return ground

path for all analog and low power circuitry. Tie a single

connection to the output capacitor GND in the application.

See layout guidelines in Figure 17.

2.5V Transient Response

3.3V Transient Response

5.0V Transient Response

VIN = 12V, VOUT = 2.5V, CFF = 82pF, CCOMP = 33pF

OUTPUT CAPACITOR = 4 100μF CERAMIC X5R

100μs/DIV

4627 G10

50mV/DIV

7.5A

LOAD STEP

VIN = 12V, VOUT = 3.3V, CFF = 82pF, CCOMP = 33pF

OUTPUT CAPACITOR = 2 100μF CERAMIC X5R

100μs/DIV

4627 G11

50mV/DIV

7.5A

LOAD STEP

VIN = 12V, VOUT = 5V, CFF = 82pF, CCOMP = 33pF

OUTPUT CAPACITOR = 2 100μF CERAMIC X5R

100μs/DIV

4627 G12

50mV/DIV

7.5A

LOAD STEP

VIN = 12V, VOUT = 1.5V, IOUT = 15A

INPUT CAP 150μF SANYO ELECTROLYTIC CAP

AND 22μF 2 X5R CERAMIC CAP

OUTPUT CAP 1 100μF X5R CERAMIC AND 470μF

0.1μF CAP FROM TRACK/SS TO GND

100μs/DIV

4627 G13

VOUT

IOUT

500mV/DIV

5A/DIV

VIN = 12V, VOUT = 1.5V, IOUT = 0A

4ms/DIV

4627 G14

500mV/DIV

1A/DIV

VOUT

IIN

VIN = 12V, VOUT = 1.5V, IOUT = 15A

4ms/DIV

4627 G15

500mV/DIV

1A/DIV

VOUT

IIN

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