MC44604 View Datasheet(PDF) - ON Semiconductor
Part Name
Description
Manufacturer
MC44604 Datasheet PDF : 22 Pages
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MC44604
ELECTRICAL CHARACTERISTICS (VCC and VC = 12 V [Note 8], Rref = 10 kW, CT = 820 pF, for typical values TA = 25°C,
for min/max values TA = −25° to +85°C [Note 9], unless otherwise noted.)
Characteristic
Pin #
Symbol
Min
Typ
Max
Unit
CURRENT SENSE SECTION
Maximum Current Sense Input Threshold
(VFeedback (pin14) = 2.3 V and Vfoldback (pin6) = 1.2 V)
Input Bias Current
Propagation Delay (Note 10) in Normal Mode
in Standby Mode
OVERVOLTAGE SECTION
Protection Threshold Level on VOVP
Propagation Delay (VOVP > 2.58 V to Vout Low)
Protection Level on VCC
TA = 0° to +70°C
TA = −25° to +85°C
Input Resistance
TA = 0° to +70°C
TA = −25° to +85°C
FOLDBACK SECTION (Note 11)
Current Sense Voltage Threshold (Vfoldback (pin5) = 0.9 V)
Foldback Input Bias Current (Vfoldback (pin5) = 0 V)
CLAMP ERROR AMPLIFIER INPUT
Clamp Level (@ l = 30 mA)
7
Vcs−th
0.93
0.96
1.00
V
7
Ics−ib
−10
−2.0
−
mA
tCS−NM
tCS−stby
−
120
200
ns
−
120
200
6
VOVP−th
2.42
2.5
2.58
V
1.0
−
3.0
ms
VCC prot
V
16.1
17
17.9
15.9
−
18.1
−
kW
1.5
2.0
3.0
1.4
−
3.4
5
Vcs−th
0.84
0.88
0.89
V
5
Ifoldback−lb
−6.0
−2.0
−
mA
12
Vcl
4.5
4.7
4.9
V
STANDBY PULSED MODE SECTION
Standby Initialization Current Ratio (S1 closed)
Minimum Initialization Current Pulse Width (Note 12)
Standby On Detection Current Ratio
Standby Regulation Current Ratio
Standby Bias Current (S1 and S2 open;
0 V t Vpin15 t Vstup−th) (Note 13)
STANDBY CURRENT SET
Peak Standby Current Setting Ratio
TA = 0° to +70°C
TA = −25° to +85°C
Standby Current Sense Threshold Ratio (Note 14)
15
Iinit/Iref
126
140
154
−
Tinit
−
−
1.0
ms
15
Idet/Iref
0.34
0.38
0.42
−
15
Ireg/Iref
18
20.5
23
−
15
Istby−ib
−1.0
−
2.0
mA
9
−
Ipk−stby/Iref
0.37
0.4
0.43
−
0.36
0.4
0.44
7
Vpin9/Vcs−st
2.4
2.6
2.9
−
TOTAL DEVICE
Power Supply Current
Startup (Note 13)
Operating TA = −25° to +85°C (Note 9)
ICC
mA
−
0.3
0.45
16
20
24
Power Supply Zener Voltage (ICC = 25 mA)
VZ
18.5
−
−
V
Thermal Shutdown
−
−
155
−
°C
8. Adjust VCC above the startup threshold before setting to 12 V.
9. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
10. Current Sense Input to Output at VTH of MOS transistor = 3.0 V.
11. This function can be inhibited by connecting pin 5 to VCC.
12. This is the minimum time during which the pin 15 current must be higher than Iinit to enable the detection of the transition normal to standby mode.
13. Tested using VCC = 6.0 V, 9.0 V, 13.5 V, the MC44604 being off.
14. Tested using Vpin9 = 0.2 V, 0.4 V, 0.6 V, 0.8 V, 1.0 V.
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