LTM4652

3

Rev. 0

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SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Input DC Voltage

l

4.5

18

V

VOUT

Output Voltage

l

0.6

7.5

V

VOUT1(DC), VOUT2(DC)

Output Voltage, Total DC Variation

with Line and Load (Note 7)

CIN = 22µF ×3, COUT = 100µF ×1 Ceramic,

470µF POSCAP, VIN = 4.5V to 18V,

VOUT = 1.2V, IOUT = 0A to ±25A

l

1.182

1.2

1.218

V

Input Specifications

VRUN1, VRUN2

RUN Pin Off Threshold

RUN Rising

1.1

1.22

1.4

V

VRUN1HYS, VRUN2HYS

RUN Pin On Hysteresis

135

mV

VVINOVP

VINOVP Pin OVP Inception Threshold VINOVP Rising

1.1

1.22

1.4

V

VOVP_HYS

VINOVP Pin OVP Inception Hysteresis

10

mV

IINRUSH(VIN)

Input Inrush Current at Start-Up

IOUT = 0A, CIN = 22µF ×3, CSS = 0.01µF,

COUT = 100µF ×3, VOUT1 = 1.2V, VOUT2 = 1.2V,

VIN = 12V

1

A

IQ(VIN)

Input Supply Bias Current (Both

Channels On)

VIN = 12V, VOUT = 1.2V, Pulse-Skipping Mode

VIN = 12V, VOUT= 1.2V, Switching Continuous

Shutdown, RUN = 0, VIN = 12V

22

135

35

mA

mA

µA

IS(VIN)

Input Supply Current

VIN = 4.5V, VOUT = 1.2V, IOUT = 25A

VIN = 12V, VOUT = 1.2V, IOUT = 25A

VIN = 4.5V, VOUT = 1.2V, IOUT = –25A

VIN = 12V, VOUT = 1.2V, IOUT = –25A

8.0

3.0

–5.2

–1.9

A

A

A

A

Output Specifications

IOUT1(DC), IOUT2(DC)

Output Continuous Current Range

VIN = 12V, VOUT = 1.2V (Note 6)

–25

25

A

ΔVOUT1(LINE)/VOUT1

ΔVOUT2(LINE)/VOUT2

Line Regulation Accuracy

For Each Output, VOUT = 1.2V, IOUT = 0A,

VIN from 4.5V to 18V

l

0.02

0.1

%/V

ΔVOUT1/VOUT1

ΔVOUT2/VOUT2

Load Regulation Accuracy

For Each Output, VIN = 12V, VOUT = 1.2V,

IOUT from 0A to ±25A

l

0.2

0.75

%

VOUT1(AC), VOUT2(AC)

Output Ripple Voltage

For Each Output, VIN = 12V, VOUT = 1.2V,

Frequency = 450kHz, IOUT = 0A, COUT =

100µF ×3 Ceramic, 470µF POSCAP

15

mVP-P

fSW (Each Channel)

Output Ripple Voltage Frequency

VIN = 12V, VOUT = 1.2V, fSET = 1.2V (Note 4)

500

kHz

fSYNC (Each Channel)

Phase-Locked Loop Synchronization

Capture Range

(Note 4)

400

780

kHz

ΔVOUTSTART

(Each Channel)

Turn-On Overshoot

COUT = 100µF ×3 Ceramic, 470µF POSCAP,

VIN = 12V , VOUT = 1.2V, IOUT = 0A

10

mV

tSTART

(Each Channel)

Turn-On Time

COUT = 100µF ×4 Ceramic,

VIN = 12V, No Load, TRACK with 0.01µF to GND

5

ms

ΔVOUT(LS)

(Each Channel)

Peak Deviation for Dynamic Load

Load: 0% to 50% to 0% of Full Load,

COUT = 100µF ×3 Ceramic, 470µF POSCAP,

VIN = 12V, VOUT = 1.2V (Note 8)

30

mV

tSETTLE

(Each Channel)

Settling Time for Dynamic Load Step

Load: 0% to 50% to 0% of Full Load,

VIN = 12V, COUT = 100µF ×3 Ceramic,

470µF POSCAP (Note 8)

20

µs

IOUT(PK) (Each Channel) Output Current Limit

VIN = 12V, VOUT = 1.2V

35

A

ELECTRICAL CHARACTERISTICS The

l

denotes the specifications which apply over the specified internal

operating temperature range. Specified as each individual output channel (Note 3). TA = 25°C (Note 2), VIN = 12V, VRUN1, VRUN2 at 5V

and IOUT1, IOUT2 at 0A unless otherwise noted. Per the typical application in Figure 31.