lm27342sdx National Semiconductor Corporation, lm27342sdx Datasheet - Page 3

• Manufacturer Part Number: lm27342sdx
• Description: 2 Mhz 1.5a/2a Wide Input Range Step-down Dc-dc Regulator With Frequency Synchronization
• Manufacturer: National Semiconductor Corporation

SYSTEM PARAMETERS
OSCILLATOR
LOGIC INPUTS (EN, SYNC)
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
Specifications with standard typeface are for T
Range (T
limits are guaranteed by design, test, or statistical analysis.
AVIN, PVIN
SW Voltage
Boost Voltage
Boost to SW Voltage
FB Voltage
SYNC Voltage
EN Voltage
Storage Temperature Range
Junction Temperature
ΔV
t
t
V
f
SYNC_HIGH
SYNC_LOW
Symbol
FOLD_MIN
I
UVLO
FB_FOLD
BOOST
f
I
OVP
FB
SYNC
SYNC
V
f
V
SS
V
I
I
I
SW
EN
FB
Q
FB
/ΔV
IH
IL
J
IN
= -40°C to 125°C). V
Feedback Voltage
Feedback Voltage Line Regulation
Feedback Input Bias Current
Over Voltage Protection, V
which PWM Halts.
Undervoltage Lockout
UVLO Hysteresis
Soft Start Time
Quiescent Current, I
I
Quiescent Current, I
I
Boost Pin Current
Switching Frequency
FB Pin Voltage where SYNC input
is overridden.
Frequency Foldback Minimum
SYNC Frequency Range
EN, SYNC Logic low threshold
EN, SYNC Logic high threshold
SYNC, Time Required above V
Ensure a Logical High.
SYNC, Time Required below V
Ensure a Logical Low.
SYNC Pin Current
Enable Pin Current
Q_PVIN
Q_PVIN
Parameter
IN
= 12V, and V
Q
Q
= I
= I
-0.5V to (V
Q_AVIN
Q_AVIN
−65°C to +150°C
FB
at
-0.5V to 6.0V
-0.5V to 3.0V
-0.5V to 6.0V
J
IH
IL
-0.5V to 24V
-0.5V to 24V
-0.5V to 28V
+
+
BOOST
(Note 1)
= 25°C, and those in boldface type apply over the full Operating Temperature
to
to
IN
+ 0.3V)
V
150°C
- V
IN
Rising until V
V
SW
V
FB
V
T
IN
Logic Falling Edge
Logic Rising Edge
EN
= 4.3V unless otherwise specified. Datasheet min/max specification
J
T
= 1.1 (not switching)
V
V
Falling from UVLO
= -40°C to 125°C
J
SYNC = GND
IN
IN
= 0V (shutdown)
Conditions
f
f
V
= 0°C to 85°C
SW
SW
3
V
V
= V
SYNC
= 3V to 20V
EN
FB
= 2 MHz
= 1 MHz
EN
Operating Ratings
= 0V
= 3V
ESD Susceptibility (Note 2)
Soldering Information
AVIN, PVIN
SW Voltage
Boost Voltage
Boost to SW Voltage
Junction Temperature Range
Thermal Resistance (θ
Thermal Resistance (θ
SW
< 5V
= 20V
Infrared Reflow (5sec)
is Switching
0.990
0.984
2.60
0.30
1.75
Min
0.5
1.8
1
JA
JA
) LLP10 (Note 3)
) eMSOP10 (Note 3)
0.003
1.13
2.75
0.47
0.53
Typ
(Note 1)
220
1.0
1.0
2.4
8.2
4.4
20
70
20
50
1
2
6
−40°C to +125°C
1.010
1.014
Max
2.90
2.35
100
250
100
100
100
0.6
1.5
2.3
0.4
10
15
6
-0.5V to 20V
-0.5V to 24V
3.0V to 5.5V
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3V to 20V
33°C/W
45°C/W
260°C
Units
% / V
MHz
MHz
2kV
kHz
mA
mA
ms
nA
nA
nA
µA
ns
ns
V
V
V
V
V