MC33470 Datasheet, PDF (3/16 Pages) ON Semiconductor – SYNCHRONOUS RECTIFICATION DC/DC CONVERTER PROGRAMMABLE INTEGRATED CONTROLLER

MC33470
ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, PVCCCC, = 12 V for typical values TA = Low to High [Notes 1, 2, 3], for
min/max values TA is the operating ambient temperature range that applies, unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
OSCILLATOR
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Frequency (VCC = 4.5 to 5.5 V)}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{FEEDBACK AMPLIFIER}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Voltage Feedback Input Threshold (Note 4)
VID0, VID1, VID2 and VID4 = “1” and VID3 = “0”
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{VID4 = “1” and VID0, VID1, VID2 and VID3 = “0”}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Input Bias Current (VCM = 2.8 V)}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Transconductance (VCM = 2.8 V, VCOMP = 2.0 V)}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Open Loop Voltage Gain (VCOMP = 2.0 V)}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Output Line Regulation (VCC = 4.5 to 5.5 V)}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Output Load Regulation}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Output Current}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Source
Sink
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{PWM SECTION}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Duty Cycle at G1 Output}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _Maximum
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Minimum
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ^{Propagation Delay}
Comp Input to G1 Output, TJ = 25°C
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Comp Input to G2 Output, TJ = 25°C}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{SOFT–START SECTION}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Charge Current (VSoft–Start = 0 V)}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Discharge Current under Current Limit (Note 5)}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ^{(VSoft–Start = 2.0 V, Vsense = Vout, Vimax = VCC, Vifb = 0 V)}
Discharge Current under Hard Current Limit
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{(VSoft–Start = 2.0 V, Vsense < Vout/2, Vimax = VCC, Vifb = 0 V)}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Hard Current Limit Hold Time}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{IMAX INPUT}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Sink Current (Vin max = VCC, Vifb = VCC)}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{POWER GOOD OUTPUT}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Threshold For Logic “1” to “0” Transition}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Upper Threshold
Lower Threshold
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Response Time}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Logic “0” to “1” (Vsense changes from 0 V to VO)}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Logic “1” to “0” (Vsense changes from VO to 0 V)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ^{Sink Current (VOL = 0.5 V)}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ^{Output Low Voltage (IOL = 100 µA) (Note 6)}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ^{NOTES: 1.Maximumpackage power dissipation limits must be observed.}
fosc
Vsense
IIB
GM
AVOL
Regline
Regload
IOH
IOL
DCmax
DCmin
tPLH1
tPLH2
Ichg
ISSIL
ISSHIL
tSSHIL
IOL
Vth
trPG
IOLPG
VOLPG
210
1.764
2.744
3.43
–
400
–
–
–
–
–
77
–
–
–
7.0
30
40
100
133
–
0.93
200
50
–
–
300
1.8
2.8
3.5
20
800
67
7.0
5.0
120
120
88
–
0.1
0.1
10
90
64
200
190
1.04
0.96
400
100
10
250
390
kHz
1.836
2.856
3.57
–
1200
–
–
–
–
–
V
V
V
µA
µmho
dB
mV
mV
µA
%
95
0
µs
–
–
13
µA
150
µA
–
mA
300
µs
247
µA
Vsense
1.07
–
µs
600
150
–
mA
500
mV
2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
3. VID1, VID3, VID4 = logic 0, and VID0, VID2 = logic 1.
4. Vsense is provided from a low impedance voltage source or shorted to the output voltage.
5. Under a typical soft current limit, the net soft–start discharge current will be 90 µA (ISSIL) – 10 µA (Ichg) = 80 µA. The softstart
sink to source current ratio is designed to be 9:1.
6 Sense (Pin 6) = 5.0 V, Comp (Pin 10) open, VID4, VID2, VID1, VID0 = 1.0, VID3 = 0.
7. OUTEN is internally pulled low if VID0, 1, 2, 3, and 4 are floating.
8. Due to internal pull–up resistors, there will be an additional 0.5 mA per pin if any of the VID0, 1, 2, 3, or 4 pins are pulled low.
MOTOROLA ANALOG IC DEVICE DATA
3