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The L4963is a monolithicpower switching regulator delivering1.5Aat 5.1V.The output voltageis adjustable from 5.1V to 36V, working in discontinuous variable frequency mode. Features of the device include remote inhibit, internal current limiting and thermal protection, reset and power fail outputs for microprocessor.
The L4963 is mounted in a 12+3+3 lead Powerdip (L4963) and SO20 large (L4963D) plastic packages and requires very few external components.
L4963 Maximum Ratings
Symbol
Parameter
Value
Unit
SO20
Powerdip
V1
Input Voltage (pin 1 and pin 3 connected togheter)
47
V
V3V2
Input to Output Voltage Difference
47
V
V2
Negative OutputDC Voltage
-1
V
V2
Negative Output Peak Voltage at t=0.2 ms, f=50kHz
-5
V
V7
V8
Power Fail Input
25
V
V9,V11
V8,V10
Reset and Power Fail Output
V1
V10
V9
Reset Delay Input
5.5
V
V13,V16
V12,V16
Feedback and Inhibit Inputs
7
V
V19,V20
V17,V16
Oscillator Inputs
5.5
V
Ptot
Total Power Dissipation Tpins 3 90°C (Power DIP) (Tamb = 70°C no copper area on PCB) (Tamb = 70°C, 4cm2 copper area on PCB)
5 1.3 2
W W W
Tstg, Tj
Storage & Junction Temperature (Tamb = 70°C 6cm2 copper area on PCB)