Datasheet

LM25085, LM25085-Q1
www.ti.com SNVS593H –OCTOBER 2008–REVISED MARCH 2013
Absolute Maximum Ratings
(1)(2)
VIN to GND -0.3V to 45V
ISEN to GND -0.3V to V
IN
+ 0.3V
ADJ to GND -0.3V to V
IN
+ 0.3V
RT, FB to GND -0.3V to 7V
VIN to VCC, VIN to PGATE -0.3V to 10V
ESD Rating
(3)
Human Body Model 2kV
Storage Temperature Range -65°C to +150°C
(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 specifications and test conditions, see the Electrical Characteristics.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(3) The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.
Operating Ratings
(1)
VIN Voltage 4.5V to 42V
Junction Temperature −40°C to + 125°C
(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 specifications and test conditions, see the Electrical Characteristics.
Electrical Characteristics
Limits in standard type are for T
J
= 25°C only; 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: VIN = 24V, R
T
= 100kΩ.
Symbol Parameter Conditions Min Typ Max Units
VIN Pin
I
IN
Operating Current Non-Switching, FB = 1.4V
(1)
1.25 1.75 mA
I
Q
Shutdown Current RT = 0V
(1)
175 300 µA
VCC Regulator
(2)
V
CC(reg)
VIN - VCC Vin = 9V, FB = 1.4V, ICC = 0mA 6.9 7.7 8.5 V
Vin = 9V, FB = 1.4V, ICC = 20mA 7.7 V
Vin = 42V, FB = 1.4V, ICC = 0mA 7.7 V
UVLO
Vcc
VCC Under-Voltage Lock-Out V
CC
Increasing 3.8 V
Threshold
UVLO
Vcc
Hysteresis V
CC
Decreasing 260 mV
V
CC(CL)
VCC Current Limit FB = 1.4V 20 40 mA
PGATE Pin
V
PGATE(HI)
PGATE High Voltage PGATE Pin = Open V
IN
-0.1 V
IN
V
V
PGATE(LO)
PGATE Low Voltage PGATE Pin = Open V
CC
V
CC
+0.1 V
V
PGATE(HI)4.5
PGATE High Voltage at Vin = 4.5V PGATE Pin = Open V
IN
-0.1 V
IN
V
V
PGATE(LO)4.5
PGATE Low Voltage at Vin = 4.5V PGATE Pin = Open V
CC
V
CC
+0.1 V
I
PGATE
Driver Output Source Current VIN = 12V, PGATE = VIN - 3.5V 1.75 A
Driver Output Sink Current VIN = 12V, PGATE = VIN - 3.5V 1.5 A
R
PGATE
Driver Output Resistance Source current = 500mA 2.3 Ω
Sink current = 500mA 2.3 Ω
Current Limit Detection
I
ADJ
ADJUST Pin Current Source V
ADJ
= 22.5V 32 40 48 µA
V
CL OFFSET
Current Limit Comparator Offset V
ADJ
= 22.5V, V
ADJ
- V
ISEN
-9 0 9 mV
(1) Operating current and shutdown current do not include the current in the R
T
resistor.
(2) V
CC
provides self bias for the internal gate drive.
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