NCP1573D ONSEMI [ON Semiconductor], NCP1573D Datasheet - Page 4

• Manufacturer Part Number: NCP1573D
• Description: Low Voltage Synchronous Buck Controller
• Manufacturer: ONSEMI [ON Semiconductor]

3. Guaranteed by design. Not tested in production.
ELECTRICAL CHARACTERISTICS (continued)
C
PACKAGE PIN DESCRIPTION
PWM Comparator
Oscillator
General Electrical Specifications
PACKAGE PIN #
PGDELAY
PWM Comparator Offset
Ramp Max Duty Cycle
Artificial Ramp
Transient Response
V
Switching Frequency
V
FB
CC
Input Range
Supply Current
1
2
3
4
5
6
7
8
= 0.01 μF, C
Characteristic
COMP
PIN SYMBOL
PGDELAY
GATE(H)
PWRGD
GATE(L)
COMP
= 0.1 μF; unless otherwise specified.)
GND
V
V
CC
FB
V
Duty Cycle = 50%
COMP = 1.5 V, V
Note 3
COMP = 0 V (No Switching)
Power supply input.
Open collector output goes low when V
current into this pin to less than 20 mA.
External capacitor programs PWRGD low−to−high transition delay.
Error amp output. PWM comparator reference input. A capacitor to LGND provides error amp
compensation. Pulling pin < 0.475 V locks gate outputs to a zero percent duty cycle state.
High−side switch FET driver pin. Capable of delivering peak currents of 1.5 A.
Low−side synchronous FET driver pin. Capable of delivering peak currents of 1.5 A.
Error amplifier and PWM comparator input.
Power supply return.
FB
Starts Switching
Note 3
= 0 V, Increase COMP Until GATE(H)
(0°C < T
Test Conditions
http://onsemi.com
FB
20 mV Overdrive.
J
−
−
< 125°C, 11.4 V < V
4
FB
FUNCTION
CC
is out of regulation. User must externally limit
< 12.6 V, C
0.475
Min
150
15
−
−
0
−
GATE(H)
0.525
Typ
200
200
80
25
10
= C
−
GATE(L)
0.575
Max
= 3.3 nF,
300
250
1.4
35
15
−
Unit
kHz
mV
mA
ns
%
V
V