Datasheet
LM20146
SNVS563C –FEBRUARY 2008–REVISED APRIL 2013
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Electrical Characteristics (continued)
Unless otherwise stated, the following conditions apply: AVIN = PVIN = VIN = 5V. Limits in standard type are for T
J
= 25°C
only, limits in bold face type apply over the junction temperature (T
J
) range of -40°C to +125°C. Minimum and Maximum limits
are specified 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.
Symbol Parameter Conditions Min Typ Max Unit
Gm Error Amplifier Transconductance I
COMP
= ± 50 µA 450 510 600 µmho
A
VOL
Error Amplifier Voltage Gain 2000 V/V
Power Good
V
OVP
Over Voltage Protection Rising Threshold With respect to V
FB
105 108 111 %
V
OVP_HYS
Over Voltage Protection Hysteresis 2 3 %
V
PGTH
PGOOD Rising Threshold With respect to V
FB
92 94 96 %
V
PGHYS
PGOOD Falling Hysteresis 2 3 %
T
PGOOD
PGOOD deglitch time 16 µs
I
OL
PGOOD Low Sink Current V
PGOOD
= 0.4V 0.6 1 mA
I
OH
PGOOD High Leakage Current V
PGOOD
= 5V 5 100 nA
Enable
V
IH_EN
EN Pin turn-on Threshold V
EN
Rising 1.08 1.18 1.28 V
V
EN_HYS
EN Pin Hysteresis 66 mV
Thermal Shutdown
T
SD
Thermal Shutdown 160 °C
T
SD_HYS
Thermal Shutdown Hysteresis 10 °C
Thermal Resistance
θ
JA
Junction to Ambient See
(1)
25 °C/W
(1) The maximum allowable power dissipation is a function of the maximum junction temperature, T
J_MAX
, the junctions-to-ambient thermal
resistance, θ
JA
, and the ambient temperature, T
A
. The maximum allowable power dissipation at any ambient temperature is calculated
using: P
D_MAX
= (T
J_MAX
– T
A
)/θ
JA
. The maximum power dissipations of 2.6W is determined using T
A
= 25°C, θ
JA
= 25°C/W, and T
J_MAX
= 125°C. The θ
JA
specification of 25°C/W listed in the electrical characteristics table is measured with the part surface mounted to a 2" x
2" FR4 4 layer board. See Figure 36 for more detailed θ
JA
information.
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