Datasheet

LM5000
SNVS176D –MAY 2004–REVISED MARCH 2007 www.ti.com
Electrical Characteristics (continued)
Specifications in standard type face are for T
J
= 25°C and those with boldface type apply over the full Operating
Temperature Range (T
J
= −40°C to +125°C) Unless otherwise specified. V
IN
= 12V and I
L
= 0A, unless otherwise specified.
Symbol Parameter Conditions Min
(1)
Typ
(2)
Max
(1)
Units
BV Output Switch Breakdown T
J
= 25°C, I
SW
= 0.1µA 80 V
Voltage
T
J
= -40°C to + 125°C, I
SW
= 76
0.5µA
V
IN
Input Voltage Range 3.1 40 V
g
m
Error Amp Transconductance ΔI = 5µA 150 410 750 µmho
A
V
Error Amp Voltage Gain 280 V/V
D
MAX
Maximum Duty Cycle FS = 0V 85 90 %
LM5000-3
Maximum Duty Cycle FS = 0V 85 90 %
LM5000-6
T
MIN
Minimum On Time 165 ns
f
S
Switching Frequency LM5000- FS = 0V 240 300 360
3
FS = Open 550 700 840 kHz
Switching Frequency LM5000- FS = 0V 485 600 715
6
FS = Open 1.055 1.3 1.545 MHz
I
SHDN
Shutdown Pin Current V
SHDN
= 0V −1 -2 µA
I
L
Switch Leakage Current V
SW
= 80V 0.008 5 µA
R
DSON
Switch R
DSON
I
SW
= 1A 160 445 mΩ
Th
SHDN
SHDN Threshold Output High 0.9 0.6 V
Output Low 0.6 0.3 V
UVLO On Threshold 2.74 2.92 3.10 V
Off Threshold 2.60 2. 77 2.96 V
OVP V
COMP
Trip 0.67 V
I
SS
Softstart Current 8 11 14 µA
θ
JA
Thermal Resistance TSSOP, Package only 150 °C/W
WSON, Package only 45
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