LM34914EVAL National Semiconductor, LM34914EVAL Datasheet - Page 3

• Manufacturer Part Number: LM34914EVAL
• Description: BOARD EVALUATION LM34914
• Manufacturer: National Semiconductor

Specifications of LM34914EVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 5V
• Current - Output: 1A
• Voltage - Input: 8 ~ 40V
• Regulator Topology: Buck
• Frequency - Switching: 275kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM34914
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

Start-Up Regulator, V
Switch Characteristics
Softstart Pin
Current Limit
VIN to RTN
BST to RTN
SW to RTN (Steady State)
BST to VCC
VIN to SW
BST to SW
VCC to RTN
SGND to RTN
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
junction temperature (T
correlation. Typical values represent the most likely parametric norm at T
Unless otherwise stated the following conditions apply: V
UVLO
UVLO
Symbol
V
Rds(on)
CC
V
I
I
LIM
SS
SS
Reg
VCC
GD
V
V
V
(0 mA
V
V
threshold
UVLO
UVLO
I
I
Buck Switch Rds(on)
Gate Drive UVLO
UVLO
Pull-up voltage
Internal current source
Threshold
Response time
IN
IN
CC
IN
CC
CC
CC
operating current
shutdown current
-V
regulated output
output impedance
current limit (Note 3)
under-voltage lockout
CC
VCC
VCC
GD
CC
≤
dropout voltage
J
I
hysteresis
CC
) range of -40°C to +125°C. Minimum and Maximum limits are guaranteed through test, design, or statistical
Parameter
hysteresis
filter delay
≤
5 mA)
44V
52V
-1.5V
44V
44V
14V
14V
-0.3V to +0.3V
Limits in standard type are for T
Vin > 9V
I
V
V
V
V
V
V
100 mV overdrive
Non-switching, FB = 3V
RON/SD = 0V
I
V
V
V
V
CC
TEST
(Note 1)
CC
IN
IN
CC
CC
CC
BST
IN
IN
IN
= 0 mA,
= 8V
= 40V
= 8V, V
= 30V, V
= 30V, V
= UVLO
= 0V
increasing
decreasing
= 200 mA
- V
SW
Conditions
IN
FB
Increasing
VCC
FB
FB
= 12V, R
= 2.4V
= 2.4V
= 1.0V
+ 250 mV
3
Current out of ISEN
SS to RTN
All Other Inputs to RTN
ESD Rating (Note 2)
Storage Temperature Range
JunctionTemperature
VIN Voltage
Junction Temperature
ON
Operating Ratings
Human Body Model
= 200kΩ. See (Note 4) and (Note 5).
J
= 25°C, and are provided for reference purposes only.
J
= 25°C only; limits in boldface type apply over the
0.85
Min
6.6
3.0
1.0
0.9
0.16
0.57
0.33
12.5
1.05
Typ
155
150
470
150
7.0
1.3
5.7
4.2
2.5
1.2
1.1
11
80
3
(Note 1)
Max
0.85
1.25
160
7.4
0.7
5.5
1.4
1.3
See text
-0.3V to 4V
-0.3 to 7V
2kV
-65°C to +150°C
150°C
−40°C to + 125°C
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8.0V to 40V
Units
mA
mV
mA
mV
µA
µA
µs
ns
Ω
Ω
V
V
V
V
V
A