LM20144EVAL National Semiconductor, LM20144EVAL Datasheet - Page 4

• Manufacturer Part Number: LM20144EVAL
• Description: BOARD EVAL 4A POWERWISE LM20144
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM20144EVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 1.2V
• Current - Output: 4A
• Voltage - Input: 2.95 ~ 5.5V
• Regulator Topology: Buck
• Frequency - Switching: 1MHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM20144
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Power - Output: -

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Enable
Thermal Shutdown
Thermal Resistance
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 do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The maximum allowable power dissipation is a function of the maximum junction temperature, T
and the ambient temperature, T
maximum power dissipations of 2.6W is determined using T
Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor to each pin.
Typical Performance Characteristics
(Coilcraft MSS1038), V
waveforms, and T
Symbol
V
T
V
SD_HYS
EN_HYS
Efficiency vs. Load Current (V
T
IH_EN
θ
Efficiency vs. Load Current (V
SD
JA
Parameter
EN Pin turn-on Threshold
EN Pin Hysteresis
Thermal Shutdown
Thermal Shutdown Hysteresis
Junction to Ambient
J
= 25°C for all others.
IN
= 5V, V
A
. The maximum allowable power dissipation at any ambient temperature is calculated using: P
OUT
IN
= 1.2V, R
IN
= 5V, f
= 5V, f
SW
LOAD
SW
A
= 500 kHz)
= 25°C, θ
= 1 MHz)
30030631
30030649
= 1.2Ω, f
JA
= 38°C/W, and T
SW
Conditions
V
= 1 MHz, T
4
Unless otherwise specified: C
EN
Efficiency vs. Load Current (V
Rising
Efficiency vs. Load Current (V
J_MAX
A
= 25°C for efficiency curves, loop gain plots and
= 125°C.
J_MAX
, the junctions-to-ambient thermal resistance, θ
IN
= C
OUT
IN
IN
= 3.3V, f
1.08
Min
D_MAX
= 3.3V, f
= 100 µF, L = 1.0 µH
= (T
1.18
Typ
160
66
10
38
SW
J_MAX
SW
30030630
= 500 kHz)
30030648
= 1 MHz)
– T
Max
1.28
A
)/θ
JA
. The
Units
°C/W
mV
°C
°C
V
JA
,