LTM4652

4

Rev. 0

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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.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Control Section

VFB1, VFB2

Voltage at VFB Pins

IOUT = 0A, VOUT = 1.2V

l

0.594

0.600

0.606

V

IFB

(Note 5)

–5

–30

nA

VOVL

Feedback Overvoltage Lockout

l

0.64

0.66

0.68

V

ITRACK1, ITRACK2

Track Pin Soft-Start Pull-Up Current

TRACK1, TRACK2 Start at 0V

1

1.25

1.5

µA

UVLO

Undervoltage Lockout (Falling)

3.4

V

UVLO Hysteresis

0.6

V

tON(MIN)

Minimum On-Time

(Note 5)

90

ns

RFBHI1, RFBHI2

Resistor Between VOUTS1, VOUTS2 and

VFB1, VFB2 Pins for Each Output

60.05

60.4

60.75

kΩ

VPGOOD1, VPGOOD2 Low PGOOD Voltage Low

IPGOOD = 2mA

0.1

0.3

V

IPGOOD

PGOOD Leakage Current

VPGOOD = 5V

±5

µA

VPGOOD

PGOOD Trip Level

VFB with Respect to Set Output Voltage

VFB Ramping Negative

VFB Ramping Positive

–10

10

%

%

INTVCC Linear Regulator

VINTVCC

Internal VCC Voltage

6V < VIN < 18V

4.75

5

5.2

V

VINTVCC Load Regulation INTVCC Load Regulation

ICC = 0mA to 50mA

0.5

2

%

VEXTVCC

EXTVCC Switchover Voltage

EXTVCC Ramping Positive

4.5

4.7

V

VEXTVCC(DROP)

EXTVCC Dropout

ICC = 20mA, VEXTVCC = 5V

50

100

mV

VEXTVCC(HYST)

EXTVCC Hysteresis

220

mV

Oscillator

Frequency Nominal

Nominal Frequency

fSET = 1.2V

450

500

550

kHz

Frequency Low

Lowest Frequency

fSET = 0.93V

fSET = 0V(Note 5)

400

250

kHz

kHz

Frequency High

Highest Frequency

fSET > 2.4V, Up to INTVCC

780

kHz

fSET

Frequency Set Current

8.5

9.5

11

µA

RMODE_PLLIN

MODE_PLLIN Input Resistance

250

kΩ

CLKOUT

Phase (Relative to VOUT1)

PHASMD = GND

PHASMD = Float

PHASMD = INTVCC

60

90

120

Deg

Deg

Deg

CLK High

CLK Low

Clock High Output Voltage

Clock Low Output Voltage

2

0.4

V

V

Differential Amplifier

AV Differential Amp

Gain

1

V/V

RIN

Input Resistance

Measured at DIFFP Input

80

kΩ

VOS

Input Offset Voltage

VDIFFP = VDIFFOUT = 1.5V, IDIFFOUT = 100µA

3

mV

PSRR Differential Amp Power Supply Rejection Ratio

4.5V < VIN < 18V

90

dB

ICL

Maximum Output Current

3

mA