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CS5212GD14 数据表(PDF) 4 Page - ON Semiconductor

部件名 CS5212GD14
功能描述  Low Voltage Synchronous Buck Controller
PDF  16 Pages
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制造商  ONSEMI [ON Semiconductor]
网页  http://www.onsemi.com
标志 ONSEMI - ON Semiconductor

CS5212GD14 数据表(HTML) 4 Page - ON Semiconductor

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CS5212
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4
ELECTRICAL CHARACTERISTICS (continued) (–40
°C < TA < 85°C (CS5212E); 0°C < TA < 70°C (CS5212G); –40°C < TJ < 125°C;
3.1 V < VCC < 3.5 V; 3.1 V < VC < 7.0 V; 4.5 V < BST < 20 V; CGATE(H) = CGATE(L) = 3.3 nF; ROSC = 51 k; CCOMP = 0.1 µF, unless other-
wise specified.)
Characteristic
Unit
Max
Typ
Min
Test Conditions
GATE(H) and GATE(L)
Rise Time
VC = BST = 7.0 V, Measure:
0.7 V < GATE(L) < 6.3 V,
0.7 V < GATE(H) < 6.3 V
–
40
80
ns
Fall Time
VC = BST = 7.0 V, Measure:
0.7 V < GATE(L) < 6.3 V,
0.7 V < GATE(H) < 6.3 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
K
Ω
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
µA
IS– Bias Current
0 V < IS– < VCC
–1.0
0.1
1.0
µA
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
µA
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
0.35
0.40
0.45
V
Artificial Ramp
Duty Cycle = 90%
40
70
100
mV
VFFB Bias Current
VFFB = 0 V
–
0.1
1.0
µA
VFFB Input Range
Note 3.
–
–
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 k
120
150
180
kHz
ROSC Voltage
–
1.21
1.25
1.29
V
General Electrical Specifications
VCC Supply Current
COMP = 0 V (no switching)
–
5.0
8.0
mA
BST/VC Supply Current
COMP = 0 V (no switching)
–
2.0
3.0
mA
Start Threshold
GATE(H) Switching, COMP Charging
2.7
2.8
2.9
V
Stop Threshold
GATE(H) Not Switching, COMP Not Charging
2.6
2.7
2.8
V
Hysteresis
Start–Stop
75
100
125
mV
Sense Ground Current
Note 4.
–
0.15
1.00
mA
3. GBD.
4. Recommended maximum operating voltage between the three grounds is 200 mV.



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