MAX1549ETL Datasheet, PDF (4/35 Pages) Maxim Integrated Products – Dual, Interleaved, Fixed-Frequency Step-Down Controller with a Dynamically Adjustable Output

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