SM74203 Datasheet, PDF (5/24 Pages) Texas Instruments – SM74203 60V Low Side Controller for Boost and SEPIC

Symbol
Parameter
SOFT-START
I_SS
V_SS-OFF
OSCILLATOR
Soft-start Current Source
Soft-start to COMP Offset
RT to GND = 84.5 kΩ
f_SW
RT to GND = 27.4 kΩ
RT to GND = 16.2 kΩ
V_SYNC-HI
Synchronization Rising Threshold
PWM COMPARATOR
t_COMP-DLY
Delay from COMP to OUT Transition
D_MIN
Minimum Duty Cycle
D_MAX
Maximum Duty Cycle
A_PWM
COMP to PWM Comparator Gain
V_COMP-OC
COMP Pin Open Circuit Voltage
I_COMP-SC
COMP Pin Short Circuit Current
SLOPE COMPENSATION
V_SLOPE
Slope Compensation Amplitude
MOSFET DRIVER
V_SAT-HI
Output High Saturation Voltage (VCC –
VOUT)
V_SAT-LO
Output Low Saturation Voltage (VOUT)
t_RISE
OUT Pin Rise Time
t_FALL
OUT Pin Fall Time
THERMAL CHARACTERISTICS
T_SD
T_SD-HYS
θ_JA
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Junction to Ambient Thermal Resistance
Conditions
(Note 5)
(Note 5)
(Note 5)
V_COMP = 2V
CS stepped from 0V to 0.4V
V_COMP = 0V
V_FB = 0V
V_COMP = 0V, V_FB = 1.5V
I_OUT = 50 mA
I_OUT = 100 mA
OUT Pin load = 1 nF
OUT Pin load = 1 nF
MUB-10A Package
Min Typ Max Units
7
10
13
µA
0.35 0.55 0.75 V
170 200 230 kHz
525 600 675 kHz
865 990 1115 kHz
3.8
V
25
ns
0
%
90
95
%
0.33
V/V
4.3
5.2 6.1
V
0.6
1.1 1.5 mA
80 105 130 mV
0.25 0.75 V
0.25 0.75 V
18
ns
15
ns
165
°C
25
°C
200
°C/W
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. The Recommended Operating Limits define the conditions within
which the device is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The human body model is a 100 pF capacitor discharged through a 1.5kΩ resistor into each pin.
Note 3: Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical
Quality Control (SQC) methods. Limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Note 4: Device thermal limitations may limit usable range.
Note 5: Specification applies to the oscillator frequency.
Note 6: VCC provides bias for the internal gate drive and control circuits.
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