ncp5423dr2g ON Semiconductor, ncp5423dr2g Datasheet - Page 5

• Manufacturer Part Number: ncp5423dr2g
• Description: Dual Outofphase Synchronous Buck Controller With Current Limit
• Manufacturer: ON Semiconductor

ELECTRICAL CHARACTERISTICS
10.8 V < V
PACKAGE PIN DESCRIPTION
Supply Currents
Undervoltage Lockout
Hiccup Mode Overcurrent Protection
3. Guaranteed by design, not 100% tested in production.
V
BST Current
Start Threshold
Stop Threshold
Hysteresis
OVC Comparator Offset Voltage
Discharge Threshold
IS+ 1(2) Bias Current
IS− 1(2) Bias Current
OVC Common Mode Range
OVC Latch COMP1 Discharge Current
OVC Latch COMP2 Discharge Current
COMP1 Charge/Discharge Ratio in OVC
CC
PIN NO.
Current
10
12
13
14
15
16
11
1
2
3
4
5
6
7
8
9
CC
Characteristic
< 13.2 V; 10.8 V < BST < 20 V, C
PIN SYMBOL
GATE(H)1
GATE(H)2
GATE(L)1
GATE(L)2
COMP1
COMP2
R
GND
V
V
IS+1
IS−1
IS−2
IS+2
BST
V
OSC
FB1
FB2
CC
Input Power supply pin.
Low Side Synchronous FET driver pin for channel 2.
High Side Switch FET driver pin for channel 2.
High Side Switch FET driver pin for channel 1.
Low Side Synchronous FET driver pin for channel 1.
Ground pin for all circuitry contained in the IC. This pin is internally bonded to the substrate of the IC.
Power input for GATE(H)1 and GATE(H)2 pins.
Positive input for channel 1 overcurrent comparator.
Negative input for channel 1 overcurrent comparator.
Error amplifier inverting input for channel 1.
Channel 1 Error Amp output. PWM Comparator reference input. A capacitor to LGND provides Error
Amp compensation. The same capacitor provides Soft−Start timing for channel 1. This pin also
disables the channel 1 output when pulled below 0.3 V.
Channel 2 Error Amp output. PWM Comparator reference input. A capacitor to LGND provides Error
Amp compensation and Soft−Start timing for channel 2. Channel 2 output is disabled when this pin is
pulled below 0.3 V.
Error amplifier inverting input for channel 2.
Negative input for channel 2 overcurrent comparator.
Positive input for channel 2 overcurrent comparator.
Oscillator frequency pin. A resistor from this pin to ground sets the oscillator frequency.
(0°C < T
COMP1,2 = 0 V (No Switching)
COMP1,2 = 0 V (No Switching)
GATE(H) Switching; COMP1,2 charging
GATE(H) not switching; COMP1,2 discharging
Start−Stop
0 V < IS+ 1(2) < 5.5 V, 0 V < IS− 1(2) < 5.5 V
0 V < IS+ 1(2) < 5.5 V
0 V < IS− 1(2) < 5.5 V
Note 3
COMP1 = 1.0 V
COMP2 = 1.0 V
GATE(H)1,2
A
< 70°C; 0°C < T
NCP5422A, NCP5423
= C
http://onsemi.com
Test Conditions
GATE(L)1,2
−
−
J
5
< 125°C; R
= 1.0 nF, unless otherwise specified.)
OSC
FUNCTION
= 30.9 k, C
0.20
−1.0
−1.0
Min
COMP1,2
7.8
7.0
0.5
2.0
0.3
5.0
55
−
−
0
= 0.1 mF,
0.25
Typ
3.5
8.6
7.8
0.8
0.1
0.1
5.0
1.2
6.0
13
70
−
Max
0.30
6.0
9.4
8.6
1.5
1.0
1.0
5.5
8.0
3.5
7.0
17
85
Unit
mA
mA
mV
mA
mA
mA
mA
V
V
V
V
V
−