Datasheet

MAX5066
Configurable, Single-/Dual-Output, Synchronous
Buck Controller for High-Current Applications
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
REG
= V
DD
= V
EN_
= +5V, T
A
= T
J
= T
MIN
to T
MAX
, unless otherwise noted, circuit of Figure 6. Typical values are at T
A
= +25°C.)
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OSCILLATOR
R
RT
= 12.4kΩ
1000
Switching Frequency f
SW
1MHz (max)
switching
frequency per
phase
R
RT
= 127kΩ 100
kHz
f
SW
= 250kHz nominal, R
RT
= 50kΩ
-7.5 +7.5
Switching Frequency Accuracy
f
SW
= 1MHz nominal, R
RT
= 12.4kΩ
-10 +10
%
RT/CLKIN Output Voltage
V
RT/CLKIN
1.225
V
RT/CLKIN Current Sourcing
Capability
I
RT/CLKIN
0.5 mA
RT/CLKIN Logic-High Threshold
V
RT/CLKIN_H
2.4 V
RT/CLKIN Logic-Low Threshold
V
RT/CLKIN_L
0.8 V
RT/CLKIN High Pulse Width
t
RT/CLKIN
30 ns
RT/CLKIN Synchronization
Frequency Range
f
RT/CLKIN
200 2000
kHz
CURRENT LIMIT
Average Current-Limit Threshold
V
CL_
V
CSP_
- V
CSN_
20.4
22.5
24.75
mV
Reverse Current-Limit Threshold
V
RCL_
V
CSP_
- V
CSN_
-3.13 -1.63 -0.1
mV
Cycle-by-Cycle Current-Limit
Threshold
V
CLpk_
V
CSP_
- V
CSN_
52.5 mV
Cycle-by-Cycle Current-Limit
Response Time
t
R
260 ns
DIGITAL FAULT INTEGRATION (DF_)
Number of Switching Cycles to
Shutdown in Current-Limit
NS
DF_
32,768
Clock
cycles
Number of Switching Cycles to
Recover from Shutdown
NR
DF_
524,288
Clock
cycles
CURRENT-SENSE AMPLIFIER
CSP_ to CSN_ Input Resistance R
CS_
1.9835
kΩ
V
IN
= V
REG
= 4.75V to 5.5V or
V
IN
= 5V to 10V
-0.3 +3.6
V
Common-Mode Range
V
CMR
(
CS
)
V
IN
= 7V to 28V
-0.3 +5.5
V
Input Offset Voltage
V
OS
(
CS
)
100 µV
Amplifier Gain A
V(CS)
36 V/V
-3dB Bandwidth f
-3dB
4
MHz
V
CSP_
= 5.5V, sinking 120
CSP_ Input Bias Current I
CSA(IN)
V
CSP_
= 0V, sourcing 30
µA