LM5015

SNVS538C – NOVEMBER 2007 – REVISED APRIL 2013

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Electrical Characteristics

Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of −40°C

to + 125°C. Minimum and Maximum limits are ensured through test, design, or statistical correlation. Typical values represent

the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. VVIN = 48V, RRT = 31.6 kΩ unless

otherwise stated. See

(1).

Symbol

Parameters

Conditions

Min

Typ

Max

Units

STARTUP REGULATOR

VVCC-REG

VCC Regulator Output

6.35

6.85

7.25

V

VCC Current Limit

VVCC = 6V

20

25

mA

VCC UVLO Threshold

VCC increasing, VIN = VCC, EN=open

3.45

3.75

4.05

V

VCC UVLO Hysteresis

VIN = VCC, EN = open

0.15

V

Bias Current (IIN)

VFB = 1.5V

3.1

4.5

mA

IQ

Shutdown Current (IIN)

VEN = 0V

110

170

µA

EN THRESHOLDS

EN Shutdown Threshold

VEN increasing

0.25

0.45

0.65

V

EN Shutdown Hysteresis

0.1

V

EN Standby Threshold

VEN increasing

1.19

1.26

1.3

V

EN Standby Hysteresis

0.1

V

EN Current Source

6

µA

MOSFET CHARACTERSTICS

Low side MOSFET RDS(ON) plus

ID = 0.6A

0.49

0.93

Ω

Current Sense Resistance

MOSFET Leakage Current

VLO = 75V

0.05

5

µA

High side MOSFET RDS(ON)

ID = 0.6A

0.45

0.90

Ω

MOSFET Leakage Current

VPVIN= 75V, VHO = PGND

0.05

5

µA

Total Gate Charge including both

VVCC = 8V

9

nC

Low and High side MOSFETs

Pre-charge Switch ON Voltage

ID = 1 mA

0.82

V

including series blocking diode

CURRENT LIMIT

ILIM

Cycle by Cycle Current Limit

1

1.2

1.4

A

Cycle by Cycle Current Limit Delay

130

ns

OSCILLATOR

FSW1

Frequency1

RRT = 31.6k

180

200

220

kHz

FSW2

Frequency2

RRT = 15.4k

365

405

445

kHz

VRT-SYNC

SYNC Threshold

VRT Increasing

3.2

V

SYNC Pulse Width Minimum

VRT > VRT-SYNC + 0.5V

15

ns

PWM COMPARATOR

Maximum Duty Cycle

49

%

Min On-time

VCOMP > VCOMP-OS

140

ns

Min On-time

VCOMP < VCOMP-OS

0

ns

VCOMP-OS

COMP to PWM Comparator Offset

0.9

1.3

1.55

V

ERROR AMPLIFIER

VFB-REF

Feedback Reference Voltage

Internal reference, VFB = VCOMP

1.236

1.26

1.274

V

FB Bias Current

10

nA

DC Gain

72

dB

COMP Sink Current

VCOMP = 250mV

2

mA

COMP Short Circuit Current

VFB = 0, VCOMP = 0

0.9

1.2

1.5

mA

COMP Open Circuit Voltage

VFB = 0

4.5

5.15

5.95

V

(1)

Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation

using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL).

4

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