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NCP5424 Datasheet(PDF) 5 Page - ON Semiconductor

Part No. NCP5424
Description  Dual Synchronous Buck Controller with Input Current Sharing
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP5424 Datasheet(HTML) 5 Page - ON Semiconductor

 
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NCP5424
http://onsemi.com
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ELECTRICAL CHARACTERISTICS (continued) (0
°C < TA < 70°C; 0°C < TJ < 125°C; ROSC = 30.9 k, CCOMP1,2 = 0.1 mF,
10.8 V < VCC < 13.2 V; 10.8 V < BST < 20 V, CGATE(H)1,2 = CGATE(L)1,2 = 1.0 nF, VFB+2 = 1.0 V; unless otherwise specified.)
Characteristic
Unit
Max
Typ
Min
Test Conditions
Oscillator
Switching Frequency
ROSC = 61.9 k; Measure GATE(H)1; Note 3
112
150
188
kHz
Switching Frequency
ROSC = 30.9 k; Measure GATE(H)1
250
300
350
kHz
Switching Frequency
ROSC = 15.1 k; Measure GATE(H)1; Note 3
450
600
750
kHz
ROSC Voltage
ROSC = 30.9 k, Note 3
0.970
1.000
1.030
V
Phase Difference
180
°
Supply Currents
VCC Current
COMP1,2 = 0 V (No Switching)
13
17
mA
BST Current
COMP1,2 = 0 V (No Switching)
3.5
6.0
mA
Undervoltage Lockout
Start Threshold
GATE(H) Switching; COMP1,2 charging
7.8
8.6
9.4
V
Stop Threshold
GATE(H) not switching; COMP1,2 discharging
7.0
7.8
8.6
V
Hysteresis
Start−Stop
0.5
0.8
1.5
V
Hiccup Mode Overcurrent Protection (Controller 1)
OVC Comparator Offset Voltage
0 V < IS+ 1 < 5.5 V, 0 V < IS− < 5.5 V
55
70
85
mV
Discharge Threshold
0.20
0.25
0.30
V
IS+ 1 Bias Current
0 V < IS+ 1 < 5.5 V
−1.0
0.1
1.0
mA
IS− Bias Current
0 V < IS− < 5.5 V
−2.0
0.2
2.0
mA
OVC Common Mode Range
0
5.5
V
OVC Latch COMP1 Discharge Current
COMP1 = 1.0 V
2.0
5.0
8.0
mA
Cycle−to−Cycle Current Limit (Controller 2)
OVC Comparator Offset Voltage
0 V < IS+ 2 < 5.5 V, 0 V < IS− < 5.5 V
55
70
85
mV
IS+ 2 Bias Current
0 V < IS+ 2 < 5.5 V
−1.0
0.1
1.0
mA
OVC Common Mode Range
0
5.5
V
OVC Latch COMP2 Discharge Current
COMP = 1.0 V
0.3
1.2
3.5
mA
3. Guaranteed by design, not 100% tested in production.


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