LM3402MRX National Semiconductor, LM3402MRX Datasheet - Page 6

• Manufacturer Part Number: LM3402MRX
• Description: LM3402/LM3402HV 0.5A Constant Current Buck Regulator for Driving High Power LEDs; Package: PSOP; No of Pins: 8; Qty per Container: 2500; Container: Reel
• Manufacturer: National Semiconductor

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DIM COMPARATOR
V
V
I
N-MOSFET AND DRIVER
R
V
V
THERMAL SHUTDOWN
T
T
THERMAL RESISTANCE
θ
DIM-PU
SD
SD-HYS
JA
IH
IL
DR-UVLO
DR-HYS
DS-ON
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see Electrical Characteristics.
Note 2: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.
Note 3: VCC provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading.
Note 4: Typical specifications represent the most likely parametric norm at 25°C operation.
Note 5: θ
Symbol
JA
of 50°C/W with DAP soldered to a minimum of 2 square inches of 1 oz. copper on the top or bottom PCB layer.
Logic High
Logic Low
DIM Pull-up Current
Buck Switch On Resistance
BOOT Under-voltage Lock-out
Threshold
BOOT Under-voltage Lock-out
Hysteresis
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Junction to Ambient
Parameter
DIM Increasing
DIM Decreasing
DIM = 1.5V
I
BOOT–SW Increasing
BOOT–SW Decreasing
MSOP-8 Package
PSOP-8 Package
SW
= 200mA, BOOT-SW = 6.3V
6
Conditions
Min
2.2
1.7
Typ
400
165
200
0.7
75
25
50
3
Max
0.8
1.5
4
Units
°C/W
mV
µA
°C
°C
Ω
V
V
V