LM34923MMX/NOPB National Semiconductor, LM34923MMX/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM34923MMX/NOPB
• Description: "75V, 650mA Non-synch Buck "
• Manufacturer: National Semiconductor
• Series: -r
• Type: Step-Down (Buck)r

Specifications of LM34923MMX/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

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Minimum Off Time
Regulation and OV Comparators
Under Voltage Sensing
UV
UV
UV
UVO
UVO
Thermal Shutdown
Tsd
Thermal Resistance
θ
JA
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: For detailed information on soldering plastic MSOP packages, refer to the Packaging Data Book available from National Semiconductor Corporation.
Note 3: All limits are guaranteed. All electrical characteristics having room temperature limits are tested during production with T
limits are guaranteed by correlating the electrical characteristics to process and temperature variations and applying statistical process control.
Note 4: The V
Note 5: The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.
Symbol
TH
HYS
BIAS
VOL
IOH
CC
Minimum Off Time
FB Reference Threshold
FB Over-Voltage Threshold
FB Bias Current
UV Threshold
UV Hysteresis Current
UV Bias Current
UVO Output Low Voltage
UVO Leakage Current
Thermal Shutdown Temp.
Thermal Shutdown Hysteresis
Junction to Ambient
output is intended as a self bias for the internal gate drive power and control circuits. Device thermal limitations limit external loading.
Parameter
VIN = 6V
Internal reference
Trip point for switch ON
Trip point for switch OFF
UV = 2V
UV = 3V
UV = 3V, I
UV = 2V, V
MUA Package
Conditions
UVO
UVO
= 5mA
= 7.8V
4
2.4365
Min
2.4
2.7
2.85
Typ
260
360
165
200
2.5
2.5
20
1
5
1
1
A
2.5625
= T
Max
347
600
2.6
7.3
J
= 25°C. All hot and cold
Units
°C/W
mV
nA
uA
nA
nA
ns
°C
°C
V
V
V