LM34919EVAL National Semiconductor, LM34919EVAL Datasheet - Page 4

• Manufacturer Part Number: LM34919EVAL
• Description: BOARD EVAL FOR LM34919 SW REG
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM34919EVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 5V
• Current - Output: 600mA
• Voltage - Input: 8 ~ 40V
• Regulator Topology: Buck
• Frequency - Switching: 800kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM34919
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

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Start-Up Regulator, V
Switch Characteristics
Softstart Pin
Current Limit
On Timer
Off Timer
Regulation and Over-Voltage Comparators (FB Pin)
UVLO
VIN to RTN
BST to RTN
SW to RTN (Steady State)
ESD Rating (Note 2)
BST to VCC
VIN to SW
UVLO
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
over the full Operating Junction Temperature (T
statistical correlation. Typical values represent the most likely parametric norm at T
purposes only. Unless otherwise stated the following conditions apply: V
Symbol
V
Rds(on)
t
t
CC
ON
ON
V
Human Body Model
t
V
I
I
OFF
LIM
I
REF
SD
Q
SS
Reg
- 1
- 2
VCC
GD
V
V
V
V
V
UVLO
UVLO
I
I
Buck Switch Rds(on)
Gate Drive UVLO
UVLO
Pull-up voltage
Internal current source
Threshold
Resistance from ISEN to SGND
Response time
On-time
On-time
Shutdown threshold
Threshold hysteresis
Minimum Off-time
FB regulation threshold
FB over-voltage threshold
FB bias current
IN
IN
CC
IN
CC
CC
CC
operating current
shutdown current
-V
regulated output
output impedance
current limit (Note 3)
under-voltage lockout threshold
CC
VCC
VCC
GD
dropout voltage
CC
hysteresis
hysteresis
filter delay
Parameter
44V
52V
-1.5V
2kV
44V
44V
Specifications with standard type are for T
(Note 1)
J
) range. Minimum and Maximum limits are guaranteed through test, design, or
I
0 mA
V
V
V
100 mV overdrive
Non-switching, FB = 3V, SW = Open
RON/SD = 0V, SW = Open
I
V
V
Current out of ISEN
V
V
Voltage at RON/SD rising
Voltage at RON/SD
SS pin = steady state
FB = 3V
V
CC
TEST
CC
CC
CC
CC
BST
SS
IN
IN
= 0 mA,
= 10V, R
= 40V, R
= 1V
= UVLO
= 0V
increasing
decreasing
- V
= 200 mA
≤
I
SW
CC
Increasing
≤
VCC
ON
ON
4
5 mA, V
= 200 kΩ
= 200 kΩ
Conditions
+ 250 mV
BST to SW
VCC to RTN
SGND to RTN
SS to RTN
All Other Inputs to RTN
Storage Temperature Range
JunctionTemperature
VIN
Junction Temperature
Operating Ratings
IN
IN
= 12V, R
= 8V
J
ON
= 25°C, and are provided for reference
J
= 200kΩ. See (Note 5).
= 25°C only; limits in boldface type apply
2.440
0.52
0.45
Min
6.6
3.0
2.1
(Note 1)
10.5
0.64
2.77
Typ
175
150
480
140
150
700
155
1.2
9.5
5.7
0.5
0.5
4.4
2.5
0.8
2.5
2.9
75
25
7
3
1
14V
14V
-0.3V to +0.3V
-0.3V to 4V
-0.3 to 7V
-65°C to +150°C
150°C
−40°C to + 125°C
2.550
Max
0.76
150
7.4
0.8
1.0
5.2
3.5
1.2
8.0V to 40V
Units
mΩ
mA
mV
mA
mV
mV
µA
µA
nA
µs
ns
µs
ns
ns
Ω
Ω
V
V
V
V
V
A
V
V
V