lm27342sdx National Semiconductor Corporation, lm27342sdx Datasheet - Page 4

• 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

www.national.com
INTERNAL MOSFET
BOOST LDO
THERMAL
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability
and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in
the recommended Operating Ratings is not implied. The recommended Operating Ratings indicate conditions at which the device is functional and should not be
operated beyond such conditions.
Note 2: Human body model, 1.5 kΩ in series with 100 pF.
Note 3: Thermal shutdown will occur if the junction temperature exceeds 165°C. The maximum power dissipation is a function of T
maximum allowable power dissipation at any ambient temperature is P
board with 2oz. copper on 4 layers in still air.
Symbol
R
T
D
V
DS(ON)
t
I
SHDN
I
MIN
SW
MAX
LDO
CL
Switch ON Resistance
Switch Current Limit
Maximum Duty Cycle
Minimum on time
Switch Leakage Current
Boost LDO Output Voltage
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
Parameter
Junction temperature falling
Junction temperature rising
D
= (T
SYNC = GND
J(MAX)
Conditions
4
LM27342
LM27341
– T
A
)/θ
JA
. All numbers apply for packages soldered directly onto a 3” x 3” PC
Min
2.5
2.0
85
Typ
150
165
3.9
93
65
40
15
J(MAX)
, θ
Max
320
JA
4.0
3.7
and T
A
. The
Units
mΩ
nA
ns
°C
°C
%
A
V