LTM4657 datasheet(4/38 Pages) AD

4 / 38 page

Data Sheet

LTM4640

analog.com

Rev. 0

4 of 38

SPECIFICATIONS

Table 1. Electrical Characteristics

(TA = 25°C. VIN = 12V per the typical application shown in Figure 1, unless otherwise specified.)

PARAMETER

SYMBOL

CONDITIONS

COMMENTS

MIN

TYP

MAX UNITS

Switching Regulator Section (per Channel)

Input DC voltage

VIN

–40°C ≤ TJ ≤

125°C

3.1

Output voltage

range

VOUT

–40°C ≤ TJ ≤

125°C

0.6

3.3

Output voltage,

total variation with

line and load

VOUT(DC)

RFB = 6.65kΩ, MODE = INTVCC,

IOUT = 0A to 15A 2

–40°C ≤ TJ ≤

125°C

1.477 1.50 1.523

RFB = 6.65kΩ, MODE = INTVCC,

IOUT = 0A to 20A

1.477 1.50 1.523

RUN pin ON

threshold

VRUN

VRUN rising

1.15

1.25

1.35

Input supply bias

current

IQ(VIN)

VIN = 12V, VOUT = 1.5V,

MODE = INTVCC, IOUT = 0A

100

VIN = 12V, VOUT = 1.5V,

MODE = GND, IOUT = 0.1A

Shutdown, RUN = 0, VIN = 12V

µA

Input supply

current

IS(VIN)

VIN = 12V, VOUT = 1.5V,

IOUT = 20A

3.25

Output continuous

current range

IOUT(DC)

VIN = 12V, VOUT = 1.5V

Line regulation

accuracy

ΔVOUT

(Line)/VOUT

VOUT = 1.5V, VIN = 3.1V to 20V,

IOUT = 0A

–40°C ≤ TJ ≤

125°C

0.01

0.1

%/V

Load regulation

accuracy

ΔVOUT

(Load)/VOUT

VOUT = 1.5V, IOUT = 0A to 15A

–40°C ≤ TJ ≤

125°C

0.1

0.5

VOUT = 1.5V, IOUT = 0A to 20A

0.1

0.5

Turn-on overshoot

ΔVOUT(START)

IOUT = 0A, COUT = 4 × 220µF

ceramic, VIN = 12V,

VOUT = 1.5V5

Turn-on time

tSTART

No load, TRACK/SS = 0.01µF,

VIN = 12V, VOUT = 1.5V

Peak-to-peak

output voltage

deviation for

dynamic load step

ΔVOUTLS

Load: 0% to 50% to 0% of full

load, 10A/µs slew rate,

COUT = 4 × 220µF ceramic,

VIN = 12V, VOUT = 1.5V 5

160

Settling time for

dynamic load step

tSETTLE

Load: 0% to 50% to 0% of full

load, 10A/µs slew rate, COUT =

4 × 220µF ceramic, VIN = 12V,

VOUT = 1.5V 5

µs

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