SM74203 Datasheet, PDF (4/24 Pages) Texas Instruments – SM74203 60V Low Side Controller for Boost and SEPIC

Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VIN to GND
VCC to GND
RT/SYNC to GND
OUT to GND
All other pins to GND
Power Dissipation
Junction Temperature
-0.3V to 65V
-0.3V to 16V
-0.3V to 5.5V
-1.5V for < 100 ns
-0.3V to 7V
Internally Limited
150°C
Storage Temperature
Soldering Information
Vapor Phase (60 sec.)
Infrared (15 sec.)
ESD Rating
Human Body Model (Note 2)
-65°C to +150°C
215°C
220°C
2 kV
Operating Ranges (Note 4)
Supply Voltage
External Volatge at V_CC
Junction Temperature Range
6V to 60V
7.5V to 14V
-40°C to +125°C
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 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.
V_IN = 24V and R_T = 27.4 kΩ unless otherwise indicated. (Note 3)
Symbol
Parameter
Conditions
Min Typ Max Units
SYSTEM PARAMETERS
V_FB
FB Pin Voltage
START-UP REGULATOR
-40°C ≤ T_J ≤ 125°C
1.225 1.250 1.275 V
VCC
VCC Regulation
VCC Regulation
9V ≤ V_IN ≤ 60V, I_CC = 1 mA
6V ≤ V_IN < 9V, VCC Pin Open
Circuit
6.6
7
7.4
5
V
I_CC
Supply Current
OUT Pin Capacitance = 0
VCC = 10V
3.5
4
mA
I_CC-LIM
VCC Current Limit
VCC = 0V, (Note 4, 6)
15
35
mA
V_IN - VCC
Dropout Voltage Across Bypass Switch
I_CC = 0 mA, f_SW < 200 kHz
6V ≤ V_IN ≤ 8.5V
200
mV
V_BYP-HI
Bypass Switch Turn-off Threshold
V_IN increasing
8.7
V
V_BYP-HYS
Bypass Switch Threshold Hysteresis
V_IN Decreasing
260
mV
Z_VCC
VCC Pin Output Impedance
0 mA ≤ ICC ≤ 5 mA
V_IN = 6.0V
V_IN = 8.0V
V_IN = 24.0V
58
53
Ω
1.6
VCC_-HI
VCC Pin UVLO Rising Threshold
5
V
VCC_-HYS
VCC Pin UVLO Falling Hysteresis
300
mV
I_VIN
Start-up Regulator Leakage
V_IN = 60V
150 500 µA
I_IN-SD
Shutdown Current
V_UVLO = 0V, VCC = Open Circuit
350 450 µA
ERROR AMPLIFIER
GBW
Gain Bandwidth
4
MHz
A_DC
I_COMP
UVLO
DC Gain
COMP Pin Current Sink Capability
V_FB = 1.5V
V_COMP = 1V
75
dB
5
17
mA
V_SD
I_SD-HYS
Shutdown Threshold
Shutdown
Hysteresis Current Source
1.22 1.25 1.28 V
16
20
24
µA
CURRENT LIMIT
t_LIM-DLY
Delay from ILIM to Output
CS steps from 0V to 0.6V
OUT transitions to 90% of VCC
30
ns
V_CS
Current Limit Threshold Voltage
t_BLK
Leading Edge Blanking Time
R_CS
CS Pin Sink Impedance
Blanking active
0.45 0.5 0.55 V
65
ns
40
75
Ω
3
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