NCP1450A ON, NCP1450A Datasheet - Page 2

• Manufacturer Part Number: NCP1450A
• Description: PWM Step-up DC-DC Controller
• Manufacturer: ON

PIN FUNCTION DESCRIPTION
Pin #
1
2
3
4
5
GND
OUT
NC
2
3
4
Symbol
GND
OUT
EXT
CE
NC
V
IN
Reference
Voltage
Chip Enable Pin
(1) The chip is enabled if a voltage equal to or greater than 0.9 V is applied.
(2) The chip is disabled if a voltage less than 0.3 V is applied.
(3) The chip is enabled if this pin is left floating.
Output voltage monitor pin and also the power supply pin for the device.
No internal connection to this pin.
Ground pin.
External transistor drive pin.
Figure 1. Typical Step-up Converter Application
+
-
Figure 2. Representative Block Diagram
OUT
NC
1 CE
CE
Amplifier
2
3
1
Error
Compensation
http://onsemi.com
Soft-Start
NCP1450A
Phase
2
GND
EXT
5
4
Pin Description
Controller
Oscillator
180 kHz
PWM
V
OUT
Driver
EXT
5