Datasheet

LM5015
SNVS538C –NOVEMBER 2007–REVISED APRIL 2013 www.ti.com
Electrical Characteristics
Limits in standard type are for T
J
= 25°C only; limits in boldface type apply over the junction temperature (T
J
) 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 T
J
= 25°C, and are provided for reference purposes only. V
VIN
= 48V, R
RT
= 31.6 kΩ unless
otherwise stated. See
(1)
.
Symbol Parameters Conditions Min Typ Max Units
STARTUP REGULATOR
V
VCC-REG
VCC Regulator Output 6.35 6.85 7.25 V
VCC Current Limit V
VCC
= 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) V
FB
= 1.5V 3.1 4.5 mA
I
Q
Shutdown Current (IIN) V
EN
= 0V 110 170 µA
EN THRESHOLDS
EN Shutdown Threshold V
EN
increasing 0.25 0.45 0.65 V
EN Shutdown Hysteresis 0.1 V
EN Standby Threshold V
EN
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 I
D
= 0.6A 0.49 0.93 Ω
Current Sense Resistance
MOSFET Leakage Current V
LO
= 75V 0.05 5 µA
High side MOSFET RDS(ON) I
D
= 0.6A 0.45 0.90 Ω
MOSFET Leakage Current V
PVIN
= 75V, V
HO
= PGND 0.05 5 µA
Total Gate Charge including both V
VCC
= 8V 9 nC
Low and High side MOSFETs
Pre-charge Switch ON Voltage I
D
= 1 mA 0.82 V
including series blocking diode
CURRENT LIMIT
I
LIM
Cycle by Cycle Current Limit 1 1.2 1.4 A
Cycle by Cycle Current Limit Delay 130 ns
OSCILLATOR
F
SW1
Frequency1 R
RT
= 31.6k 180 200 220 kHz
F
SW2
Frequency2 R
RT
= 15.4k 365 405 445 kHz
V
RT-SYNC
SYNC Threshold V
RT
Increasing 3.2 V
SYNC Pulse Width Minimum V
RT
> V
RT-SYNC
+ 0.5V 15 ns
PWM COMPARATOR
Maximum Duty Cycle 49 %
Min On-time V
COMP
> V
COMP-OS
140 ns
Min On-time V
COMP
< V
COMP-OS
0 ns
V
COMP-OS
COMP to PWM Comparator Offset 0.9 1.3 1.55 V
ERROR AMPLIFIER
V
FB-REF
Feedback Reference Voltage Internal reference, V
FB
= V
COMP
1.236 1.26 1.274 V
FB Bias Current 10 nA
DC Gain 72 dB
COMP Sink Current V
COMP
= 250mV 2 mA
COMP Short Circuit Current V
FB
= 0, V
COMP
= 0 0.9 1.2 1.5 mA
COMP Open Circuit Voltage V
FB
= 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).
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