LM2734X EVAL National Semiconductor, LM2734X EVAL Datasheet - Page 3

• Manufacturer Part Number: LM2734X EVAL
• Description: BOARD EVALUATION LM2734X
• Manufacturer: National Semiconductor

Specifications of LM2734X EVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 1.8V
• Current - Output: 1A
• Voltage - Input: 3 ~ 20V
• Regulator Topology: Buck
• Frequency - Switching: 1.6MHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM2734
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Power - Output: -

ΔV
Symbol
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
guaranteed by design, test, or statistical analysis.
R
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see Electrical Characteristics.
Note 2: Human body model, 1.5kΩ in series with 100pF.
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. For a 2 layer board using 1 oz. copper in still air, θ
Note 4: Guaranteed to National’s Average Outgoing Quality Level (AOQL).
Note 5: Typicals represent the most likely parametric norm.
V
UVLO
I
V
SW Voltage
Boost Voltage
Boost to SW Voltage
FB Voltage
EN Voltage
Junction Temperature
ESD Susceptibility
D
BOOST
D
FB
F
DS(ON)
EN_TH
V
I
IN
I
I
I
MAX
I
SW
FB
CL
EN
SW
MIN
FB
Q
/ΔV
IN
J
= -40°C to 125°C). V
Feedback Voltage
Feedback Voltage Line Regulation V
Feedback Input Bias Current
Undervoltage Lockout
Undervoltage Lockout
UVLO Hysteresis
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Switch ON Resistance
Switch Current Limit
Quiescent Current
Quiescent Current (shutdown)
Boost Pin Current
Shutdown Threshold Voltage
Enable Threshold Voltage
Enable Pin Current
Switch Leakage
(Note
Parameter
2)
IN
= 5V, V
-0.5V to (V
BOOST
-0.5V to 6.0V
-0.5V to 3.0V
J
-0.5V to 24V
-0.5V to 24V
-0.5V to 30V
- V
(Note
Sink/Source
V
V
LM2734X
LM2734Y
LM2734X
LM2734Y
LM2734X
LM2734Y
V
V
Switching
V
LM2734X (50% Duty Cycle)
LM2734Y (50% Duty Cycle)
V
V
Sink/Source
= 25°C, and those in boldface type apply over the full Operating Temperature
IN
IN
IN
BOOST
BOOST
EN
EN
EN
IN
SW
= 3V to 20V
Rising
Falling
+ 0.3V)
= 0V
Falling
Rising
150°C
= 5V unless otherwise specified. Datasheet min/max specification limits are
1)
2kV
- V
- V
D
Conditions
= (T
SW
SW
= 3V
= 3V
J(MAX)
3
– T
Operating Ratings
Storage Temp. Range
Soldering Information
V
SW Voltage
Boost Voltage
Boost to SW Voltage
Junction Temperature Range
Thermal Resistance θ
A
)/θ
IN
Reflow Peak Pkg. Temp.(15sec)
JA
. All numbers apply for packages soldered directly onto a 3” x 3” PC
JA
= 204°C/W.
(Note
0.784
0.30
0.40
Min
2.0
1.2
1.2
1.8
85
90
4)
JA
(Note
(Note
0.800
3)
0.01
2.74
0.44
0.55
Typ
300
2.3
1.6
1.7
1.5
2.5
1.0
10
92
96
30
10
40
2
1
(Note
5)
J(MAX)
1)
−40°C to +125°C
(Note
, θ
0.816
Max
2.90
0.62
0.66
-65°C to 150°C
250
600
JA
1.9
2.5
2.5
3.5
1.8
0.4
and T
-0.5V to 20V
-0.5V to 25V
1.6V to 5.5V
4)
www.national.com
3V to 20V
118°C/W
A
. The
260°C
Units
% / V
MHz
mΩ
mA
mA
nA
nA
nA
nA
%
%
V
V
A
V