Datasheet

LM25007
www.ti.com SNVS401C –JANUARY 2006–REVISED FEBRUARY 2013
Electrical Characteristics
(1)
Specifications with standard type are for T
J
= 25°C only; limits in boldface type apply over the full Operating Junction
Temperature (T
J
) range. Minimum and Maximum limits are guaranteed 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
= 24V, R
ON
= 200kΩ. .
Symbol Parameter Conditions Min Typ Max Unit
Startup Regulator
V
CC
Reg V
CC
Regulator Output 6.6 7 7.4 V
V
CC
Current Limit
(2)
11 mA
V
CC
Supply
V
CC
undervoltage Lockout Voltage 6.3 V
(V
CC
increasing)
V
CC
Undervoltage Hysteresis 206 mV
V
CC
UVLO Delay (filter) 3 µs
Operating Current (I
CC
) Non-Switching, FB = 3V 500 675 µA
Shutdown/Standby Current RON/SD = 0V 70 150 µA
Switch Characteristics
Buck Switch Rds(on) I
TEST
= 200mA, 0.74 1.34 Ω
VBST −VSW = 6.3V
(3)
Gate Drive UVLO (VBST – VSW) Rising 3.4 4.5 5.5 V
Gate Drive UVLO Hysteresis 400 mV
Current Limit
Current Limit Threshold 535 725 900 mA
Current Limit Response Time I
switch
Overdrive = 0.1A Time to 225 ns
Switch Off
OFF time generator (test 1) FB=0V, RCL = 100K 17 µs
OFF time generator (test 2) FB=2.3V, RCL = 100K 2.65 µs
On Time Generator
TON -1 Vin = 10V 2.15 2.77 3.5 µs
Ron = 200K
TON -2 Vin = 40V 450 615 810 ns
Ron = 200K
Remote Shutdown Threshold Rising 0.45 0.7 1.1 V
Remote Shutdown Hysteresis 40 mV
Minimum Off Time
Minimum Off Timer FB = 0V 300 ns
Regulation and OV Comparators
FB Reference Threshold Internal reference 2.445 2.5 2.550 V
Trip point for switch ON
FB Over-Voltage Threshold Trip point for switch OFF 2.875 V
FB Bias Current 100 nA
Thermal Shutdown
Tsd Thermal Shutdown Temp. 165 °C
Thermal Shutdown Hysteresis 25 °C
Thermal Resistance
θ
JA
Junction to Ambient DGK Package 200 °C/W
NGT Package 40 °C/W
(1) All limits are guaranteed. All electrical characteristics having room temperature limits are tested during production with T
A
= T
J
= 25°C.
All hot and cold limits are guaranteed 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 guaranteed by design characterization data only.
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