XRP7714_1009 Datasheet, PDF (3/29 Pages) Exar Corporation – Quad Channel Digital PWM Step Down Controller

XRP7714
Quad Channel Digital PWM Step Down Controller
Low Drop-out Regulator
Parameter
LDOOUT Output Voltage
LDO=LOW
LDOOUT Output Voltage
LDO=HIGH
LDOOUT Short Circuit Current
Limit
Min.
3.15
4.75
110
Typ.
3.3
5.0
Max.
3.45
5.25
220
Units
V
V
mA
Conditions
•
4.75V≤VIN1≤25V
0mA<ILDOOUT<100mA
•
6.3≤VIN1≤25V
0mA<ILDOOUT<100mA
• V_LDOOUT=0V
Auxiliary ADCs
Parameter
Linearity Error Integral
Linearity Error Differential
Input Dynamic Range VIN1
Input Dynamic Range VIN2
Min.
-1
4.8
4.8
Typ.
Max.
2
1
25
25
Units
LSB
LSB
V
•
V
•
Conditions
Isense ADC
Parameter
ADC LSB
Input Dynamic Range
Min.
0
Typ.
5
Max.
-320
Units
mV
mV
Conditions
Referred to the input
PWM Generators and Oscillator
Parameter
Output frequency range
Output Frequency Accuracy
Channel-to-channel phase shift
Minimum On Time
Min.
300
-10
Dead Time Adjustment Step
CLOCK IN Synchronization
Range
-5
Maximum Duty Cycle²
86
78
Typ.
90
40
13
1.5
Max.
1500
10
5
Units
kHz
%
deg
ns
ns
ns
%
%
%
Conditions
Steps defined in the table in the PWM
Switching Frequency Setting section
below
•
1nF of gate capacitance
Switching frequency = 300kHz
10% to 90% duty cycle, Frequency
dependant; refer to the graph in
performance characteristic section
Switching frequency = 1.5MHz
10% to 90% duty cycle, Frequency
dependant; refer to the graph in
performance characteristic section
•
• Switching frequency = 300kHz
• Switching frequency = 1.5MHz
Note 2: The maximum duty cycle represents the maximum duty cycle commanded by the DPWM, is guaranteed by design,
and internally set to ensure proper sampling of the current during the off-time.
© 2010 Exar Corporation
3/29
Rev. 1.1.4