Datasheet

LM5071
www.ti.com SNVS409E –NOVEMBER 2005–REVISED APRIL 2013
Electrical Characteristics
(1)
Specifications in standard type face are for T
J
= +25°C and those in boldface type apply over the full operating junction
temperature range. Unless otherwise specified: V
IN
= 48V, V
CC
= 10V, RT = 30.3kΩ.
Symbol Parameter Conditions Min Typ Max Units
Powered Interface
IOS Offset Current V
IN
< 10.0V 10 uA
VCLSS(ON) Signature Resistor Disable / V
IN
with respect to V
EE
10.0 11.5 12.5 V
Classification Current Turn On
VCLSS(OFF) Classification Current Turn Off V
IN
with respect to V
EE
23.5 25.0 26.5 V
Classification Voltage With respect to V
EE
1.43 1.5 1.57 V
ICLASS Supply Current During V
IN
=17V 0.5 1.0 mA
Classification
IDC Supply Current During Normal OUT floating 1 1.9 mA
Operation
UVLO Pin Reference Voltage V
IN
> 27V 1.95 2.00 2.05 V
UVLO Hysteresis Current V
IN
> UVLO 8.0 10 11.5 uA
Softstart Release RTN falling with respect to V
EE
1.2 1.45 1.7 V
Softstart Release Hysteresis RTN rising with respect to V
EE
0.8 1.1 1.3 V
RDS(ON) PowerFET Resistance I = 350mA, V
IN
= 48V 1 2.2 Ω
ILEAK SMPS Bias Current V
EE
= 0V, V
IN
= RTN = 57V 100 uA
AUX Pin Threshold AUX pin rising with respect to V
EE
2.4 2.5 2.65 V
AUX Pin Threshold Hysteresis AUX pin falling with respect to V
EE
0.4 0.5 0.6 V
ZAUX AUX Pin Input Impedance AUX = 0.5V 350 kΩ
I
INRUSH
Inrush Current Limit V
EE
= 0V, RTN = 3.0V 70 100 130 mA
ILIM DC Current Limit V
EE
= 0V, RTN = 3.0V, 350 390 420 mA
Temp = 0°C to 85°C
ILIM DC Current Limit V
EE
= 0V, RTN = 3.0V, Temp = - 325 390 420 mA
40°C to 125°C
Startup Regulator
VinMin Operational VIN Input Voltage AUX = 5V, Vcc = Vin
(2)
9.5 V
VccReg V
CC
Regulation Open ckt 7.5 7.8 8.1 V
V
CC
Current Limit See
(3)
15 20 mA
V
CC
Supply
V
CC
UVLO (Rising) VccReg VccReg –
– 300mV 100mV
V
CC
UVLO (Falling) 5.9 6.25 6.6 V
Supply Current (Icc) Cload = 0 1.5 3 mA
Error Amplifier
GBW Gain Bandwidth 4 MHz
DC Gain 75 dB
Input Voltage FB = COMP 1.219 1.281 V
1.212 1.288
COMP Sink Capability FB=1.5V COMP=1V 5 20 mA
Current Limit
ILIM Delay to Output CS step from 0 to 0.6V, time to 20 ns
onset of OUT transition (90%)
Cycle by Cycle Current Limit 0.44 0.5 0.56 V
Threshold Voltage
(1) Min and Max limits are 100% production tested at 25 °C. Limits over the operating temperature range are specified through correlation
using Statistical Quality Control (SQC) methods. Limits are used to calculate Texas Instruments’ Average Outgoing Quality Level
(AOQL).
(2) The Vcc regulator requires an external source whenever the Vin pin is below 13V with respect to RTN. An external load on Vcc
increases this startup voltage requirement.
(3) Device thermal limitations may limit usable range.
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