ncv890201 ON Semiconductor, ncv890201 Datasheet - Page 4

• Manufacturer Part Number: ncv890201
• Description: Automotive Buck Switching Regulator
• Manufacturer: ON Semiconductor

PIN FUNCTION DESCRIPTIONS
Exposed
Pin No.
Pad
10
1
2
3
4
5
6
7
8
9
Symbol
SYNCO
SYNCI
COMP
GND
DRV
BST
VIN
SW
EN
FB
Input voltage from battery. Place an input filter capacitor in close proximity to this pin.
Output voltage to provide a regulated voltage to the Power Switch gate driver.
Synchronization output. Turn−on of the Power Switch causes the SYNCO signal to fall. SYNCO rises
half a switching period later. Connecting to the SYNCI pin of another NCV890201 causes them to switch
out−of−phase
Battery return, and output voltage ground reference.
This TTL compatible Enable input allows the direct connection of Battery as the enable signal. Grounding
this input stops switching and reduces quiescent current draw to a minimum.
Error Amplifier output, for tailoring transient response with external compensation components.
Feedback input pin to program output voltage, and detect pre−charged or shorted output conditions.
Synchronization input. Connecting an external clock to the SYNCI pin synchronizes switching to the
rising edge of the SYNCI voltage.
Bootstrap input provides drive voltage higher than VIN to the N−channel Power Switch for optimum
switch R
Switching node of the Regulator. Connect the output inductor and cathode of the freewheeling diode to
this pin.
Connect to Pin 4 (electrical ground) and to a low thermal resistance path to the ambient temperature
environment.
DS(on)
and highest efficiency.
SYNCO
GND
DRV
VIN
EN
Figure 3. Pin Connections
http://onsemi.com
1
2
3
4
5
(Top View)
4
10
9
8
7
6
Description
SW
BST
SYNCI
FB
COMP