LM34923MM/NOPB National Semiconductor, LM34923MM/NOPB Datasheet - Page 3

• Manufacturer Part Number: LM34923MM/NOPB
• Description: "75V, 650mA Non-synch Buck "
• Manufacturer: National Semiconductor
• Series: -r
• Type: Step-Down (Buck)r

Specifications of LM34923MM/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 2.5 V ~ 75 V
• Current - Output: 600mA
• Frequency - Switching: 50kHz ~ 600kHz
• Voltage - Input: 6 V ~ 75 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

VCC Supply
Vcc Reg
Switch Characteristics
Current Limit
T
T
T
T
On Time Generator
T
T
OFF-1
OFF-2
OFF-3
OFF-4
ON
ON
VIN, UV to RTN
BST to RTN
SW to RTN (Steady State)
BST to VCC
BST to SW
VCC, UVO, RT to RTN
FB, RT, 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
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: VIN =
Symbol
- 1
- 2
Current Limit Threshold
Current Limit Response Time
OFF time generator (test 1)
OFF time generator (test 2)
OFF time generator (test 3)
OFF time generator (test 4)
On-Time
On-Time
Remote Shutdown Threshold
Remote Shutdown Hysteresis
Gate Drive UVLO hysteresis
Pre-charge switch on-time
Pre-charge switch voltage
Vcc Output Impedance
Vcc Regulator Output
Vcc UVLO hysteresis
Iin Shutdown Current
Iin Operating current
Buckswitch Rds(on)
Gate Drive UVLO
Vcc Current Limit
Parameter
Vcc UVLO
Vin – Vcc
-1V to V
Specifications with standard type are for T
Vin = 48V
VIN = 6V, I
Vin =6V
Vin = 48V (Note 4)
Vcc Increasing
FB = 3V, Vin = 48V
RT/SD = 0V
Itest = 200 mA
Vbst – Vsw Rising
At 1 mA
I
Switch Off
FB=0V, VIN = 75V
FB=2.3V, VIN = 75V
FB=0V, VIN = 10V
FB=2.3V, VIN = 10V
Vin = 10V
Ron = 250K
Vin = 75V
Ron = 250K
Voltage at RT/SD rising
–0.3V to 10V
switch
(Note
J
-0.3V to 80V
-0.3V to 88V
) range. Minimum and Maximum limits are guaranteed through test, design, or
-0.3 to 5V
IN
= 1.24A, Time to
1)
+ 0.3V
Conditions
80V
10V
CC
= 5mA
3
ESD Rating
For soldering specs see:
Junction Temperature
Storage Temperature Range
V
Operating Junction Temperature
Operating Ratings
IN
Human Body Model
www.national.com/ms/MS/MS-SOLDERING.pdf
48V(Note
2.15
0.46
Min
700
300
7.1
2.2
20
(Note
J
= 25°C, and are provided for reference
J
5)
3).
= 25°C only; limits in boldface type apply
1175
0.56
1.25
Typ
240
450
250
150
190
450
7.5
0.8
7.2
5.7
3.3
0.9
45
30
20
37
60
4
1
3
(Note
1500
Max
1.32
4.51
565
7.9
4.8
1.1
3.8
1.4
70
1)
−40°C to + 125°C
-55°C to +150°C
www.national.com
6V to 75V
Units
mV
mA
mV
mA
mV
mA
mV
150°C
µA
ns
ns
µs
µs
µs
µs
µs
ns
Ω
Ω
V
V
V
V
V
2kV