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CS5302 Datasheet(PDF) 6 Page - ON Semiconductor

Part No. CS5302
Description  Two−Phase Buck Controller with Integrated Gate Drivers and 4−Bit DAC
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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CS5302 Datasheet(HTML) 6 Page - ON Semiconductor

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CS5302
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6
ELECTRICAL CHARACTERISTICS (continued) (0°C < TA < 70°C; 0°C < TJ < 125°C; 4.7 V < VCCL < 14 V; 10 V < VCCH < 20 V;
CGATE(H) = 3.3 nF, CGATE(L) = 3.3 nF, RR(OSC) = 32.4 k, CCOMP = 1.0 nF, CSS = 0.1 μF, CREF = 0.1 μF, DAC Code 1001, CVCC = 1.0 μF,
ILIM ≥ 1.0 V; unless otherwise 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)
90
105
135
mV
Current Share Amplifier Bandwidth
Note 5
1.0
MHz
Reference Output
VREF Output Voltage
0 mA < I(VREF) < 1.0 mA
3.2
3.3
3.4
V
General Electrical Specifications
VCCL Operating Current
VFB = COMP (no switching)
20
24.5
mA
VCCL1 Operating Current
VFB = COMP (no switching)
4.0
5.5
mA
VCCL2 Operating Current
VFB = COMP (no switching)
4.0
5.5
mA
VCCH1 Operating Current
VFB = COMP (no switching)
2.8
4.0
mA
VCCH2 Operating Current
VFB = COMP (no switching)
2.5
3.5
mA
VCCL Start Threshold
GATEs switching, Soft Start charging
4.05
4.4
4.7
V
VCCL Stop Threshold
GATEs stop switching, Soft Start discharging
3.75
4.2
4.6
V
VCCL Hysteresis
GATEs not switching, Soft Start not charging
100
200
300
mV
VCCH1 Start Threshold
GATEs switching, Soft Start charging
8.4
9.2
9.9
V
VCCH1 Stop Threshold
GATEs stop switching, Soft Start discharging
7.8
8.7
9.6
V
VCCH1 Hysteresis
GATEs not switching, Soft Start not charging
300
500
700
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.
4−5
CS1−CS2
Current sense inputs. Connect current sense network for the
corresponding phase to each input.
6
CSREF
Reference for current sense amplifiers and input for Power
Good comparators. To balance input offset voltages between
the inverting and non−inverting inputs of the current sense
amplifiers, connect a resistor between CSREF and the output
voltage. The value should be 2/5 of the value of the resistors
connected to the CSx pins.
7
PWRGD
Power Good Output. Open collector output goes low when
CSREF is out of regulation.


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