lm2854mhx-500 National Semiconductor Corporation, lm2854mhx-500 Datasheet - Page 4

• Manufacturer Part Number: lm2854mhx-500
• Description: 4a 500 Khz /1 Mhz Synchronous Simple Switcher Buck Requlator
• Manufacturer: National Semiconductor Corporation

www.national.com
SYSTEM PARAMETERS
PWM SECTION
ENABLE CONTROL
THERMAL CONTROL
THERMAL RESISTANCE
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
PVIN, AVIN, SW, EN, FB, SS to GND
ESD Susceptibility (Note 2)
Power Dissipation
Junction Temperature
Storage Temperature Range
Electrical Characteristics
apply over the Operating Junction Temperature Range T
through test, design, or statistical correlation. Typical values represent the most likely parametric norm at T
provided for reference purposes only. AVIN = PVIN = EN = 5.0V, unless otherwise indicated in the Conditions column.
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the
device is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. Test method is per JESD22-AI14.
Note 3: Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical
Quality Control (SQC) methods. Limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Note 4: Typical numbers are at 25°C and represent the most likely parametric norm.
Note 5: V
Note 6: PGND and AGND are electrically connected together on the PC board and the resultant net is termed GND.
ΔV
ΔV
R
R
Symbol
V
REF
T
DS(ON)-P
DS(ON)-N
D
EN(HYS)
V
SD-HYS
REF
V
T
f
V
θ
I
I
I
range
SW
REF
I
SS
CL
SD
/ΔAVIN
ON
SD
Q
JA
IH
REF
/ΔI
measured in a non-switching, closed-loop configuration.
O
Parameter
Reference Voltage (Note 5)
Line Regulation (Note 5)
Load Regulation
UVLO Threshold (AVIN)
PFET On Resistance
NFET On Resistance
Soft-Start Current
Peak Current Limit Threshold
Operating Current
Shut Down Quiescent Current
Switching Frequency
PWM Duty Cycle Range
EN Pin Rising Threshold
EN Pin Hysteresis
T
Hysteresis for Thermal Shutdown
Junction to Ambient
J
for Thermal Shutdown
−65°C to +150°C
Internally Limited
Specifications with standard typeface are for T
-0.3V to 6.0V
(Notes 1, 6)
150°C
±2 kV
J
range of -40°C to 125°C. Minimum and maximum limits are guaranteed
Conditions
Measured at the FB pin
ΔAVIN = 2.95V to 5.50V
Normal operation
Rising
Falling hysteresis
I
I
Non-switching
EN = 0V
1 MHz option
500 kHz option
MXA16A
SW
SW
4
= 4A
= 4A
PVIN to GND
AVIN to GND
Junction Temperature
Soldering (10 sec)
Vapor Phase (60 sec)
Infrared
Operating Ratings
Lead Temperature
(Note 3)
0.790
J
Min
800
400
4.5
0.8
25
= 25°C only; limits in bold face type
0
(Note 6)
(Note 4)
1050
0.04
0.25
1.23
Typ
170
230
525
150
165
0.8
2.6
6.0
1.7
35
34
10
35
2
J
= 25°C, and are
−40°C to +125°C
(Note 3)
2.95V to 5.5V
2.95V to 5.5V
0.808
1160
Max
2.95
1.65
375
500
580
100
0.6
6.7
65
65
3
260°C
215°C
220°C
Units
mV/A
°C/W
kHz
kHz
mΩ
mΩ
mV
mA
mV
µA
µA
°C
°C
%
%
V
V
A
V