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MAX1549ETL Datasheet(PDF) 4 Page - Maxim Integrated Products

Part # MAX1549ETL
Description  Dual, Interleaved, Fixed-Frequency Step-Down Controller with a Dynamically Adjustable Output
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1549ETL Datasheet(HTML) 4 Page - Maxim Integrated Products

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Dual, Interleaved, Fixed-Frequency Step-Down
Controller with a Dynamically Adjustable Output
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VCC = VDD = 5V, SKIP = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
FBLANK = VCC
110
150
190
FBLANK = open
60
100
140
Fault-Blanking Time
tFBLANK
FBLANK = REF
22
50
75
µs
Thermal-Shutdown Threshold
TSHDN
Hysteresis = 15°C
+165
°C
VCC Undervoltage-Lockout
Threshold
VCC(UVLO)
Rising edge, PWM disabled below this
level, hysteresis = 50mV
4.1
4.25
4.4
V
CURRENT LIMIT
ILIM_ Adjustment Range
0.25
VREF
V
Current-Limit Input Range
VCSH_, VCSL _
0
2.7
V
CSH_/CSL_ Input Bias Current
VCSH_ = VCSL _ = 0 to 2.7V
-0.15
+0.15
µA
Current-Limit Threshold (Fixed)
VLIMIT
VCSH_ - VCSL _, ILIM_ = VCC
65
70
75
mV
VILIM_ = 2.0V
170
200
230
VILIM_ = 1.0V
91
100
109
Current-Limit Threshold
(Adjustable)
VLIMIT
VCSH_ - VCSL _
VILIM_ = 0.5V
42
50
58
mV
Current-Limit Threshold
(Zero Crossing)
VZX
VPGND - VLX_, SKIP = GND
3
mV
ILIM_ = VCC
10
15
20
mV
Idle-Mode
™ Threshold
VCSH_ - VCSL _
With respect to
current-limit
threshold
20
%
ILIM_ Leakage Current
-0.1
+0.1
µA
GATE DRIVERS
DH_ Gate-Driver On-Resistance
RDH
BST_ - LX_ forced to 5V
1.5
6
Ω
DL_, high state
1.5
6
DL_ Gate-Driver On-Resistance
RDL
DL_, low state
0.5
2.7
Ω
DH_ Gate-Driver Source/Sink
Current
IDH
DH_ forced to 2.5V, BST_ - LX_ forced to 5V
1A
DL_ Gate-Driver Source Current
IDL (SOURCE) DL_ forced to 2.5V
1
A
DL_ Gate-Driver Sink Current
IDL (SINK)
DL_ forced to 2.5V
3
A
DL_ rising
35
Dead Time
tDEAD
DH_ rising
26
ns
INPUTS AND OUTPUTS
OD_ On-Resistance
ROD_10
100
Ω
OD_ Leakage Current
IOD_
OD_ high impedance, VOD_ = 5.5V
100
nA
ON_ Logic Input Threshold
Rising edge, hysteresis = 600mV
2.4
2.6
2.8
V
High
2.4
Logic Input Voltage
SKIP, G0, G1 hysteresis =
600mV
Low
0.8
V
Idle Mode is a trademark of Maxim Integrated Products, Inc.


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