CMOS CURRENT MODE
PWM CONTROLLERS
1
2
3
4
5
6
7
8
TC18C46
TC28C46
TC38C46
ELECTRICAL CHARACTERISTICS: unless otherwise stated, these specifications apply for TA = – 55°C to
+125°C for TC18C46; – 40°C to +85°C for the TC28C46; and 0°C to +70°C for the TC38C46; VIN = VDD = 16V;
RT = 30.1k; CT = 270pF.
TC18C46
TC28C46
TC38C46
Min Typ
Parameter
Test Conditions
Min Typ
Max
Max
Units
Reference Section
Output Voltage
Tf = 25°C, IO = 1mA
5.0
—
5.1
Ϯ4
5.2
Ϯ20
Ϯ20
Ϯ0.5
5.24
—
5.0
—
5.1
Ϯ4
5.2
Ϯ20
Ϯ20
Ϯ0.5
5.26
—
V
Line Regulation
VIN = 8V to 16V
mV
mV
mV/°C
V
Load Regulation
Temp Coefficient
Total Output Range
Long Term Drift
IO = 1mA to 10mA
—
Ϯ4
—
Ϯ4
Over Operating Range, (Note 1)
Line, Load, and Temperature (Note 1)
Tf = 125°C, 1000 Hrs (Note 1)
VREF = 0V
—
Ϯ0.2
—
—
Ϯ0.2
—
4.97
—
4.94
—
Ϯ50
—
Ϯ50
—
mV
mA
Short Circuit
20
70
20
70
Output Current
Output Noise Voltage
10 Hz ≤ f ≤ 10 kHz, Tf = 25°C (Note 1)
—
22
—
—
22
—
µV(rms)
Oscillator Section
Initial Accuracy
Tf = 25°C
96.5
—
102
Ϯ.1
Ϯ.04
2
106.5
2.0
96.5
—
101
Ϯ.1
Ϯ.04
2
106.5
Ϯ1.5
Ϯ0.06
3
kHz
%/V
%/°C
mA
Voltage Coefficient
Temp Coefficient
VIN = 8V to 16V
Over Operating Range (Note 1)
—
Ϯ0.06
3
—
Clock Ramp
1.2
1.2
Reset Current
Osc Ramp Amplitude
3.6
3.8
—
4
3.6
3.8
—
4
V
V
Sync Output High Level
(Note 1)
VDD
—
VDD
—
–0.5
–0.5
Sync Output Low Level
Sync Input High Level
Sync Input Low Level
Sync Input Current
(Note 1)
—
—
—
—
—
8.5
8.5
±5
0.5
—
—
—
—
—
—
8.5
8.5
±5
0.5
—
V
Pin 8 = 0V, (Note 1)
Pin 8 = 0V, (Note 1)
Sync Voltage = 5.25V, Pin 8 = 0V
V
5
5
V
Ϯ50
Ϯ50
nA
Error Amp Section
Input Offset Voltage
Input Bias Current
Input Offset Current
Open Loop Voltage Gain
Gain Bandwidth Product
CMRR
—
—
—
70
0.7
70
70
2
±5
±10
±10
90
1
±25
±100
±100
—
—
—
—
70
0.7
70
70
2
±5
±0.1
±0.1
90
±25
±0.5
±0.5
—
mV
nA
nA
∆VO = 1V to 6V, RL = 100k
Tf = 25°C (Note 1)
VCM = 0V to 11V
dB
—
1
—
MHz
dB
90
90
4
—
90
—
PSRR
VIN = 8V to 16V
—
90
—
dB
Output Sink Current
V(EA –) = 5V, V(EA+) = 4.9V,
V(CMPTR) = 1.2V
—
4
—
mA
Output Source Current
V(EA –) = 5V, V(EA+) = 5.1V,
V(CMPTR) = 2.5V
5
10
—
5
10
—
mA
High Level Output Volt
Low Level Output Volt
Slew Rate
RL = (CMPTR) 5kΩ to GND, ACL = 300
RL = (CMPTR) 5kΩ to GND, ACL = 300
4.75
—
4.9
0.4
2
5.1
0.9
—
4.75
—
4.9
0.4
2
5.1
0.9
—
V
V
1.3
1.3
V/µsec
TELCOM SEMICONDUCTOR, INC.
4-103
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
