MAX15035 Datasheet, PDF (4/27 Pages) Maxim Integrated Products – 15A Step-Down Regulator with Internal Switches

15A Step-Down Regulator with Internal Switches
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V_IN = 12V, V_DD = V_CC = V_EN = 5V, REFIN = ILIM = REF, SKIP = GND. T_A = 0°C to +85°C, unless otherwise spec-
ified. Typical values are at T_A = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Ultrasonic Current-Limit
Threshold
SKIP = open (3.3V); V_FB = V_REFIN + 50mV,
-35
mV
V_GND - V_LX
Internal BST Switch
On-Resistance
R_BST I_BST = 10mA, V_DD = 5V
4
7
Ω
INPUTS AND OUTPUTS
EN Logic-Input Threshold
V_EN EN rising edge, hysteresis = 450mV (typ)
1.20
1.7
2.20
V
EN Logic-Input Current
I_EN
EN forced to GND or V_DD, T_A = +25°C
-0.5
+0.5
µA
SKIP Quad-Level Input Logic
Levels
V_SKIP
High (5V V_DD)
Open (3.3V)
Ref (2.0V)
V_CC -
0.4
3.0
1.7
3.6
V
2.3
Low (GND)
0.4
SKIP Logic-Input Current
I_SKIP SKIP forced to GND or V_DD, T_A = +25°C
-2
+2
µA
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V_IN = 12V, V_DD = V_CC = V_EN = 5V, REFIN = ILIM = REF, SKIP = GND. T_A = -40°C to +85°C, unless otherwise
specified.) (Note 1)
PARAMETER
PWM CONTROLLER
Input Voltage Range
Quiescent Supply Current (V_DD)
On-Time
Minimum Off-Time
REFIN Voltage Range
FB Voltage Range
FB Voltage Accuracy
SYMBOL
CONDITIONS
MIN
V_IN
I_DD + I_CC
t_ON
t_OFF(MIN)
V_REFIN
V_FB
V_FB
FB forced above REFIN
V_IN = 12V,
V_FB = 1.0V
(Note 3)
(Note 3)
R_TON = 97.5kΩ (600kHz)
R_TON = 200kΩ (300kHz)
R_TON = 302.5kΩ (200kHz)
(Note 2)
(Note 2)
Measured at FB,
V_IN = 4.5V to
26V, SKIP =
V_DD
V_REFIN = 0.5V
V_REFIN = 1.0V
V_REFIN = 2.0V
4.5
115
270
368
0
0
0.49
0.99
1.985
MAX UNITS
26
V
1.2
mA
213
336
ns
516
400
ns
V_REF
V
V_REF
V
0.51
1.01
V
2.015
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