LTM4609 datasheet(3/38 Pages) LINER

3 / 38 page

LTM4636-1

46361fa

For more information www.linear.com/LTM4636-1

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the specified internal

operating temperature range (Note 2), otherwise specifications are at TA = 25°C. VIN = 12V, per the Typical Application in Figure 20.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Input DC Voltage

VIN ≤ 5.5V, Tie VIN and PVCC Together, Tie RUNP to GND

4.70

VOUT

VOUT Range

0.6

3.3

VOUT(DC)

DC Output Voltage, Total

Variation with Line and Load

CIN = 22µF × 5

COUT = 100µF × 4 Ceramic, 470µF POSCAP × 3

RFB = 40.2k, MODE_PLLIN = GND

VIN = 4.70V to 15V, IOUT = 0A to 40A (Note 4)

1.4805

1.50

1.5195

Input Specifications

VRUNC

RUNC Pin On Threshold

VRUNC Rising

1.1

1.22

1.35

VRUNCHYS

RUNC Pin On Hysteresis

150

VRUNP

RUNP Pin On Threshold

RUNP Pin Rising

0.7

0.8

0.9

RUNP HYS

RUNP Pin Hysteresis

HIZREG

HIZREG Input Threshold

VIN = 12V, RUNC = 5V, RUNP = VIN, VOUT = 1.5V

2.3

HIZREG HYS

HIZREG Hysteresis

VIN = 12V, RUNC = 5V, RUNP = VIN, VOUT = 1.5V

0.8

IQ(VIN)

Input Supply Bias Current

VIN = 12V, VOUT = 1.5V, Burst Mode Operation, IOUT = 0.1A

VIN = 12V, VOUT = 1.5V, Pulse-Skipping Mode, IOUT = 0.1A

VIN = 12V, VOUT = 1.5V, Switching Continuous, IOUT = 0.1A

Shutdown, RUN = 0, VIN = 12V

105

µA

IS(VIN)

Input Supply Current

VIN = 5V, VOUT = 1.5V, IOUT = 40A

VIN = 12V, VOUT = 1.5V, IOUT = 40A

14.7

5.66

Output Specifications

IOUT(DC)

Output Continuous Current

Range

VIN = 12V, VOUT = 1.5V (Note 4)

∆VOUT (Line)

VOUT

Line Regulation Accuracy

VOUT = 1.5V, VIN from 4.70V to 15V

IOUT = 0A

0.02

0.06

%/V

∆VOUT (Load)

VOUT

Load Regulation Accuracy

VOUT = 1.5V, IOUT = 0A to 40A, VIN = 12V (Note 4)

0.2

0.35

VOUT(AC)

Output Ripple Voltage

IOUT = 0A, COUT = 100µF × 3 Ceramic, 470µF × 3 POSCAP,

VIN = 12V, VOUT = 1.5V

mVP-P

∆VOUT(START)

Turn-On Overshoot

COUT = 100µF × 4 Ceramic, 470µF × 3 POSCAP,

VOUT = 1.5V, IOUT = 0A, VIN = 12V, TRACK/SS = 0.1µF

tSTART

Turn-On Time

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

No Load, TRACK/SS = 0.001µF, VIN = 12V

750

µs

∆VOUTLS

Peak Deviation for Dynamic

Load

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

COUT = 100µF × 4 Ceramic, 470µF × 3 POSCAP,

VIN = 12V, VOUT = 1.5V, CFF = 22pF

tSETTLE

Settling Time for Dynamic

Load Step

Load: 0% to 50% to 0% of Full Load, VIN = 5V,

COUT = 100µF × 4 Ceramic, 470µF × 3 POSCAP,

VIN = 12V, VOUT = 1.5V, CFF = 22pF

µs

IOUTPK

Output Current Limit

VIN = 12V, VOUT = 1.5V

VIN = 5V, VOUT = 1.5V

Control Section

VFB

Voltage at VFB Pin

IOUT = 0A, VOUT = 1.5V

0.594

0.600

0.606

IFB

Current at VFB Pin

(Note 6)

–30

–100

VOVL

Feedback Overvoltage

Lockout

Measure at VOUTS1

7.5

ITRACK/SS

Track Pin Soft-Start Pull-Up

Current

TRACK/SS = 0V, Default 750µs Turn on with TRACK/SS

Tied to INTVCC

1.1

1.35

1.6

µA

tON(MIN)

Minimum On-Time

(Note 3)

100

RFBHI

Resistor Between VOUTS1 and

VFB Pins

4.99

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