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CS5211 데이터시트(PDF) 4 Page - ON Semiconductor

부품명 CS5211
상세설명  Low Voltage Synchronous Buck Controller
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CS5211
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ELECTRICAL CHARACTERISTICS (−40°C < TA < 85°C; −40°C < TJ < 125°C; 4.5 V < VCC, VC < 14 V; 7.0 V < BST < 20 V;
CGATE(H) = CGATE(L) = 3.3 nF; ROSC = 51 k; CCOMP = 0.1 mF, unless otherwise specified.) (Note 2)
Characteristic
Test Conditions
Min
Typ
Max
Unit
Error Amplifier
VFB Bias Current
VFB = 0 V
0.1
1.0
mA
COMP Source Current
VFB = 0.8 V
15
30
60
mA
COMP SINK Current
VFB = 1.2 V
15
30
60
mA
Open Loop Gain
98
dB
Unity Gain Bandwidth
C = 0.1 mF
50
kHz
PSRR @ 1.0 kHz
70
dB
Output Transconductance
32
mmho
Output Impedance
2.5
MW
Reference Voltage
−0.1 V < SGND < 0.1 V, COMP = VFB, Measure VFB to SGND
0.977
0.992
1.007
V
COMP Max Voltage
VFB = 0.8 V
2.5
3.0
V
COMP Min Voltage
VFB = 1.2 V
0.1
0.2
V
GATE(H) and GATE(L)
High Voltage (AC)
GATE(L),
GATE(H) 0.5 nF < CGATE(H) = CGATE(L) < 10 nF
VC − 0.5
BST − 0.5
V
Low Voltage (AC)
GATE(L) or GATE(H) 0.5 nF < CGATE(H); CGATE(L) < 10 nF
0.5
V
Rise Time
VC = BST = 10 V, Measure:
1.0 V < GATE(L) < 9.0 V, 1.0 V < GATE(H) < 9.0 V
40
80
ns
Fall Time
VC = BST = 10 V, Measure:
1.0 V < GATE(L) < 9.0 V, 1.0 V < GATE(H) < 9.0 V
40
80
ns
GATE(H) to GATE(L) Delay
GATE(H) < 2.0 V, GATE(L) > 2.0 V
40
70
110
ns
GATE(L) to GATE(H) Delay
GATE(L) < 2.0 V, GATE(H) > 2.0 V
40
70
110
ns
GATE(H)/(L) Pull−Down
Resistance to PGND
20
50
115
KW
Overcurrent Protection
OVC Comparator Offset Voltage
0 V < IS+ < VCC, 0 V < IS− < VCC
54
60
66
mV
IS+ Bias Current
0 V < IS+ < VCC
−1.0
0.1
1.0
mA
IS− Bias Current
0 V < IS− < VCC
−1.0
0.1
1.0
mA
COMP Discharge Threshold
0.20
0.25
0.30
V
COMP Discharge Current in
OVC Fault Mode
COMP = 1.0 V
2.0
5.0
8.0
mA
PWM Comparator
Transient Response
COMP = 0 − 1.5 V, VFFB, 20 mV overdrive
100
200
ns
PWM Comparator Offset
VFB = VFFB = 0 V; Increase COMP until GATE(H) starts switching
0.425
0.475
0.525
V
Artificial Ramp
Duty Cycle = 90%
40
70
100
mV
VFFB Bias Current
VFFB = 0 V
0.1
1.0
mA
VFFB Input Range
(Note 4)
1.1
V
Minimum Pulse Width
200
ns
Oscillator
Switching Frequency
ROSC = 18 k
600
750
900
kHz
Switching Frequency
ROSC = 51 k
240
300
360
kHz
Switching Frequency
ROSC = 115 kW
120
150
180
kHz
ROSC Voltage
1.21
1.25
1.29
V
2. Guaranteed by design. Not tested in production.


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