Datasheet

LM5009
SNVS402G –FEBRUARY 2006–REVISED FEBRUARY 2013 www.ti.com
Electrical Characteristics
Limits in standard type are for T
J
= 25°C only, and limits in boldface type apply over the junction temperature (T
J
) range of
‑40°C to +125°C. Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical values
represent the most likely parametric norm at T
J
= 25°C, and are provided for reference purposes only. Unless otherwise
stated, the following conditions apply: V
IN
= 48V, R
ON
= 200kΩ. See
(1)
Symbol Parameter Conditions Min Typ Max Unit
V
CC
Supply
V
CC
Reg V
CC
Regulator Output 6.6 7 7.4 V
V
CC
Current Limit
(2)
9.5 mA
V
CC
undervoltage Lockout 6.3 V
Voltage (V
CC
increasing)
V
CC
Undervoltage Hysteresis 200 mV
V
CC
UVLO Delay (filter) 100mV overdrive 10 µs
I
IN
Operating Current Non-Switching, FB = 3V 485 675 µA
I
IN
Shutdown Current RON/SD = 0V 76 150 µA
Switch Characteristics
Buck Switch Rds(on) I
TEST
= 200mA
(3)
2.0 4.4 Ω
Gate Drive UVLO V
BST
− V
SW
Rising 3.4 4.5 5.5 V
Gate Drive UVLO Hysteresis 430 mV
Current Limit
Current Limit Threshold 0.25 0.31 0.37 A
Current Limit Response Time I
switch
Overdrive = 0.1A Time to Switch Off 400 ns
OFF time generator (test 1) FB=0V, R
CL
= 100K 35 µs
OFF time generator (test 2) FB=2.3V, R
CL
= 100K 2.56 µs
On Time Generator
T
ON
- 1 Vin = 10V, Ron = 200K 2.15 2.77 3.5 µs
T
ON
- 2 Vin = 95V, Ron = 200K 200 300 420 ns
Remote Shutdown Threshold Rising 0.40 0.70 1.05 V
Remote Shutdown Hysteresis 35 mV
Minimum Off Time
Minimum Off Timer FB = 0V 300 ns
Regulation and OV Comparators
FB Reference Threshold Internal reference, Trip point for switch ON 2.445 2.5 2.550 V
FB Over-Voltage Threshold Trip point for switch OFF 2.875 V
FB Bias Current 1 nA
Thermal Shutdown
Tsd Thermal Shutdown Temperature 165 °C
Thermal Shutdown Hysteresis 25 °C
Thermal Resistance
θ
JA
Junction to Ambient VSSOP Package 200 °C/W
WSON Package 40 °C/W
(1) All electrical characteristics having room temperature limits are tested during production with T
A
= T
J
= 25°C. All hot and cold limits are
specified by correlating the electrical characteristics to process and temperature variations and applying statistical process control.
(2) The V
CC
output is intended as a self bias for the internal gate drive power and control circuits. Device thermal limitations limit external
loading.
(3) For devices procured in the WSON-8 package, the Rds(on) limits are specified by design characterization data only.
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