LTM4677 datasheet(13/132 Pages) AD

13 / 132 page

LTM4681

Rev. 0

For more information www.analog.com

TYPICAL PERFORMANCE CHARACTERISTICS T

A = 25°C, unless otherwise noted.

Single Channel Load Transient

Response (10A) to (20A) Load Step,

10A/µs 12VIN to 0.9VOUT

Single Channel Load Transient

Response (10A) to (20A)

Load Step, 10A/µs VIN = 12V,

VOUT = 2.5V, fSW = 500kHz

Single Channel Load Transient

Response (10A) to 1 (20A)

Load Step, 10A/µs VIN = 12V,

VOUT = 3.3V, fSW = 500kHz

Single Channel Load Transient

Response (10A) to (20A)

Load Step, 10A/µs VIN = 12V,

VOUT = 1.2V, fSW = 350kHz

Single Channel Load Transient

Response (10A) to (20A)

Load Step, 10A/µs VIN = 12V,

VOUT = 1.5V, fSW = 350kHz

100mV/DIV

LOAD STEP

10A/DIV

200µs/DIV

FIGURE 48 CIRCUIT, 12V TO 1.2V, FREQ = 350kHz

COUT = 470µF ×2 POSCAP, 100µF ×2 CERAMIC

RCOMP = 7k, EA-GM = 4.36ms

COMPna = 2.2nF, COMPnb = 150pF

ILIM RANGE HIGH, VOUT RANGE LOW

4681 G06

100mV/DIV

LOAD STEP

5A/DIV

200µs/DIV

FIGURE 48 CIRCUIT, 12V TO 1.5V, FREQ = 350kHz

COUT = 470µF ×2 POSCAP, 100µF ×2 CERAMIC

RCOMP = 7k, EA-GM = 3.69ms

COMPna = 2.2nF, COMPnb = 150pF

ILIM RANGE HIGH, VOUT RANGE LOW

4681 G07

100mV/DIV

LOAD STEP

10A/DIV

200µs/DIV

FIGURE 48 CIRCUIT, 12V TO 2.5V, FREQ = 500kHz

COUT = 470µF ×1 POSCAP, 100µF ×1 CERAMIC

RCOMP = 6k, EA-GM = 2.35ms,

COMPna = 2.2nF, COMPnb = 220pF

ILIM RANGE HIGH, VOUT RANGE LOW

4681 G08

200mV/DIV

LOAD STEP

5A/DIV

200µs/DIV

FIGURE 48 CIRCUIT, 12V TO 3.3V, FREQ = 500kHz

COUT = 470µF ×1 POSCAP, 100µF ×1 CERAMIC

RCOMP = 11k, EA-GM = 1.68ms,

COMPna = 2.2nF, COMPnb = 100pF

ILIM RANGE HIGH, VOUT RANGE HIGH

4681 G09

50mV/DIV

LOAD STEP

10A/DIV

200S/DIV

FIGURE 48 CIRCUIT, 12V TO 0.9V, FREQ = 350kHz

COUT = 470µF ×3 POSCAP, 100µF ×5 CERAMIC

RCOMP = 11k, EA-GM = 4.36ms

COMPna = 2.2nF, COMPnb = 150pF

ILIM RANGE HIGH, VOUT RANGE LOW

4681 G04

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