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NCP1570 Datasheet(PDF) 3 Page - ON Semiconductor

No. de Pieza. NCP1570
Descripción  Low Voltage Synchronous Buck Controller
Descarga  14 Pages
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Fabricante  ONSEMI [ON Semiconductor]
Página de inicio  http://www.onsemi.com
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NCP1570 Datasheet(HTML) 3 Page - ON Semiconductor

 
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NCP1570
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ELECTRICAL CHARACTERISTICS (0°C < TJ < 125°C, 11.4 V < VCC < 12.6 V, CGATE(H) = CGATE(L) = 3.3 nF,
CPGDELAY = 0.01 μF, CCOMP = 0.1 μF; unless otherwise specified.)
Characteristic
Test Conditions
Min
Typ
Max
Unit
Error Amplifier
VFB Bias Current
VFB = 0 V
0.2
2.0
μA
COMP Source Current
COMP = 1.5 V, VFB = 0.8 V
15
30
60
μA
COMP Sink Current
COMP = 1.5 V, VFB = 1.2 V
15
30
60
μA
Reference Voltage
COMP = VFB
0.975
0.985
0.995
V
COMP Max Voltage
VFB = 0.8 V
2.4
2.7
V
COMP Min Voltage
VFB = 1.2 V
0.1
0.2
V
COMP Fault Discharge Current at
UVLO
COMP = 1.2 V, VCC = 6.9 V
0.5
1.7
mA
COMP Fault Discharge Threshold to
Reset UVLO
COMP = 0.5 V, VCC = 12 V − 6.9 V − 12 V.
Ramp COMP to 0.1 V. Monitor I (COMP)
0.1
0.25
0.3
V
Open Loop Gain
98
dB
Unity Gain Bandwidth
20
kHz
PSRR @ 1.0 kHz
70
dB
Output Transconductance
32
mmho
Output Impedance
2.5
GATE(H) and GATE(L)
Rise Time
1.0 V < GATE(L) & GATE(H) < VCC − 2.0 V
40
80
ns
Fall Time
VCC − 2.0 V < GATE(L) & GATE(H) < 1.0 V
40
80
ns
GATE(H) to GATE(L) Delay
GATE(H) < 2.0 V, GATE(L) > 2.0 V
25
50
75
ns
GATE(L) to GATE(H) Delay
GATE(L) < 2.0 V, GATE(H) > 2.0 V
25
50
75
ns
Minimum Pulse Width
GATE(X) = 4.0 V
250
ns
High Voltage (AC)
Measure GATE(L) or GATE(H)
0.5 nF < CGATE(H) = CGATE(L) < 10 nF
Note 2
VCC − 0.5
VCC
V
Low Voltage (AC)
Measure GATE(L) or GATE(H)
0.5 nF < CGATE(H) = CGATE(L) < 10 nF
Note 2
0
0.5
V
GATE(H)/(L) Pull−Down
Resistance to GND. Note 2
20
50
115
Power Good
Lower Threshold, VO Rising
0.856
0.887
0.917
V
Lower Threshold, VO Falling
0.666
0.690
0.713
V
PWRGD Low Voltage
ISINK = 1.0 mA, VFB = 0 V
0.15
0.4
V
Delay Charge Current
PGDELAY = 2.0 V
7.0
12
18
μA
Delay Clamp Voltage
3.45
4.0
4.3
V
Delay Charge Threshold
Ramp PGDELAY, Monitor PWRGD
3.1
3.3
3.5
V
Delay Discharge Current at UVLO
PGDELAY = 0.5 V, VCC = 6.9 V
0.5
2.0
mA
Delay Discharge Threshold to Reset
UVLO
PGDELAY = 0.5 V, VCC = 12 V to 6.9 V to
12 V, Ramp PGDELAY to 0.1 V, Monitor I
(PGDELAY)
0.1
0.25
0.3
V
“Good” Signal Delay
With 0.01 μF. Note 2
1.0
3.0
5.0
ms
2. Guaranteed by design. Not tested in production.


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