Datasheet

LM5020
www.ti.com SNVS275F –MAY 2004–REVISED APRIL 2006
Absolute Maximum Ratings
(1)(2)
VIN to GND -0.3V to 100V
VCC to GND -0.3V to 16V
RT to GND -0.3V to 5.5V
All other pins to GND -0.3V to 7V
Power Dissipation Internally Limited
ESD Rating
(3)
Human Body Model 2kV
Storage Temperature -65°C to +150°C
Junction Temperature 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 ensured 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 100 pF capacitor discharged through a 1.5kΩ resistor.
Operating Ratings
VIN Voltage 13V to 90V
External Voltage applied to VCC 8V to 15V
Operating Junction Temperature -40°C to +125°C
Electrical Characteristics
Specifications in standard type face are for T
J
= +25°C and those in boldface type apply over the full operating junction
temperature range. Unless otherwise specified: VIN = 48V, VCC = 10V, and RT = 31.6kΩ.
(1)
Symbol Parameter Conditions Min Typ Max Units
Startup Regulator
V
CC
Reg V
CC
Regulation V
CC
= Open 7.4 7.7 8.0 V
V
CC
Current Limit See
(2)
15 22 mA
I-V
IN
Startup Regulator Leakage V
IN
= 100V 150 500 µA
I
IN
Shutdown Current V
UVLO
= 0V, V
CC
= open 250 350 µA
VCC Supply
V
CC
UVLO (Rising) VccReg VccReg - V
- 300mV 100mV
V
CC
UVLO (Falling) 5.3 6.0 6.7 V
I
CC
Supply Current Cload = 0 2 3 mA
Error Amplifier
GBW Gain Bandwidth 4 MHz
DC Gain 75 dB
Reference Voltage FB = COMP 1.225 1.25 1.275 V
COMP Sink Capability FB = 1.5V COMP= 1V 5 17 mA
UVLO Pin
Shutdown Threshold 1.225 1.25 1.275 V
Undervoltage Shutdown Hysteresis 16 20 24 µA
Current Source
Current Limit
ILIM Delay to Output CS step from 0 to 0.6V 30 ns
Time to onset of OUT
Transition (90%)
Cycle by Cycle CS Threshold 0.45 0.5 0.55 V
Voltage
Leading Edge Blanking Time 50 ns
(1) Limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through correlation using
Statistical Quality Control (SQC) methods. The limits are used to calculate National's Average Outgoing Quality Level (AOQL).
(2) Device thermal limitations may limit usable range.
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