ncp1597 ON Semiconductor, ncp1597 Datasheet
ncp1597
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ncp1597 Summary of contents
Page 1
... PWM converters that integrate low−resistance, high−side P−channel MOSFET and low−side N−channel MOSFET. The NCP1597/A utilizes current mode control to provide fast transient response and excellent loop stability. It regulates input voltages from 2 6.0 V down to an output voltage as low as 0 ...
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... Input supply pin for internal bias circuitry. A 0.1 mF ceramic bypass capacitor is preferred to connect CC to this pin connection for NCP1597 EN Logic input to enable the part. Logic high to turn on the part and logic low to shut off the part. For NCP1597A only EP PAD Exposed pad of the package provides both electrical contact to the ground and good thermal contact to the PCB ...
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... Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. APPLICATION CIRCUIT VCCP LX GND VCC FB NC/EN Figure 2. NCP1597/A Symbol V −0.3 V (DC) to 7.0 V −1.0 V For T < 100 ns in −0 0.3 V, −1.0 V For T < 100 ns in −0 6.5 V, −1.0 V For T < 100 ns ...
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ELECTRICAL CHARACTERISTICS (V = 4.0 V − +25°C for typical value; −40°C < out A Parameter V Input Voltage Range in V UVLO Threshold CC UVLO Hysteresis V Quiescent Current ...
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... Pulse Width Modulation A high−speed PWM comparator, capable of pulse widths as low as 50 ns, is included in the NCP1597/A. The inverting input of the comparator is connected to the output of the error amplifier. The non−inverting input is connected to the the current sense signal. At the beginning of each PWM cycle, the CLK signal sets the PWM flip− ...
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... Low side FETs off till soft start ramp reaches the FB Pin voltage. Thermal Shutdown The NCP1597/A protects itself from over heating with an internal thermal monitoring circuit. If the junction temperature exceeds the thermal shutdown threshold the voltage at the COMP pin will be pulled to GND and both the upper and lower MOSFETs will be shut OFF ...
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... In addition, both surface mount tantalum and through−hole aluminum electrolytic capacitors can be used as well. Maximum Output Capacitor NCP1597/A family has internal 1 ms fixed soft−start and overcurrent limit. It limits the maximum allowed output capacitor to startup successfully. The maximum allowed output capacitor can be determined by the equation: ...
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... PC board to the air. Solder the underside−exposed pad to a large copper GND plane. If the die temperature reaches +160°C the 2 PP NCP1597/A shut down and does not restart again until the D (eq die temperature cools by 40°C. ...
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... MAX A 0.80 0.90 1.00 A1 0.00 0.03 0.05 A3 0.20 REF b 0.35 0.40 0.45 D 3.00 BSC D2 2.40 2.50 2.60 E 3.00 BSC E2 1.50 1.60 1.70 e 0.95 BSC K 0.21 −−− −−− L 0.30 0.40 0.50 SOLDERING FOOTPRINT* 0.950 0.0374 1.700 0.685 2.60 0.1023 mm SCALE 10:1 inches ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative NCP1597/D ...