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CS5303 Datasheet(PDF) 6 Page - ON Semiconductor

Part No. CS5303
Description  Three−Phase Buck Controller with Integrated Gate Drivers
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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CS5303 Datasheet(HTML) 6 Page - ON Semiconductor

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CS5303
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6
ELECTRICAL CHARACTERISTICS (continued) (0°C < TA < 70°C; 0°C < TJ < 125°C; 4.7 V < VCCL < 14 V; 8 V < VCCH < 20 V;
CGATE(H) = 3.3 nF, CGATE(L) = 3.3 nF, RR(OSC) = 53.6 k, CCOMP = 0.1 μF, CREF = 0.1μF, DAC Code 10000, CVCC = 1.0 μF, ILIM ≥ 1 V;unless other-
wise specified)
Characteristic
Unit
Max
Typ
Min
Test Conditions
Current Sensing and Sharing
ILIM Bias Current
0 < ILIM < 1.0 V
0.1
1.0
μA
Single Phase Pulse by Pulse
Current Limit: V(CSx) − V(CSREF)
60
70
90
mV
Current Share Amplifier Bandwidth
Note 5
1.0
mHz
Reference Output
VREF Output Voltage
0 mA < I(VREF) < 1.0 mA
3.15
3.25
3.35
V
General Electrical Specifications
VCCLL1 Operating Current
VFB = COMP(no switching)
23
28
mA
VCCL23 Operating Current
VFB = COMP(no switching)
8.0
11
mA
VCCH12 Operating Current
VFB = COMP(no switching)
5.5
7.0
mA
VCCH3 Operating Current
VFB = COMP(no switching)
2.5
3.5
mA
VCCLL1 Start Threshold
GATEs switching, COMP charging
4.05
4.40
4.70
V
VCCLL1 Stop Threshold
GATEs stop switching, COMP discharging
3.75
4.20
4.60
V
VCCLL1 Hysteresis
GATEs not switching, COMP not charging
100
200
300
mV
VCCH12 Start Threshold
GATEs switching, COMP charging
1.7
1.9
2.1
V
VCCH12 Stop Threshold
GATEs stop switching, COMP discharging
1.55
1.75
1.90
V
VCCH12 Hysteresis
GATEs not switching, COMP not charging
100
200
300
mV
5. Guaranteed by design. Not tested in production.
PACKAGE PIN DESCRIPTION
PACKAGE PIN #
PIN SYMBOL
FUNCTION
28 Lead SO Wide
1
COMP
Output of the error amplifier and input for the PWM
comparators.
2
VFB
Voltage Feedback Pin. To use Adaptive Voltage Positioning
(AVP) select an offset voltage at light load and connect a
resistor between VFB and VOUT. The input bias current of the
VFB pin and the resistor value determine output voltage off-
set for zero output current. Short VFB to VOUT for no AVP.
3
VDRP
Current sense output for AVP. The offset of this pin above the
DAC voltage is proportional to the output current. Connect a
resistor from this pin to VFB to set amount AVP or leave this
pin open for no AVP.
4−6
CS1−CS3
Current sense amplifier inputs. Connect current sense net-
work for the corresponding phase to each input.
7
CSREF
Reference for current sense amplifiers. To balance input
offset voltages between the inverting and noninverting inputs
of the current sense amplifiers, connect a resistor between
CSREF and the output voltage. The value should be 1/3 of
the value of the resistors connected to the CSx pins.
8−12
VID4−VID0
Voltage ID DAC inputs. These pins are internally pulled up to
3.3 V if left open.
13
ILIM
Sets threshold for current limit. Connect to reference through
a resistive divider.


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