MAX1715 Maxim, MAX1715 Datasheet - Page 5

• Manufacturer Part Number: MAX1715
• Description: Ultra-High Efficiency / Dual Step-Down Controller for Notebook Computers
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, 4A components from Table 1, V
noted.) (Note 1)
(Circuit of Figure 1, components from Table 1, V
Note 1: Specifications to -40°C are guaranteed by design, and not production tested.
Note 2: When the inductor is in continuous conduction, the output voltage will have a DC regulation higher than the trip level by
Note 3: On-time and off-time specifications are measured from the 50% point at the DH pin with LX = PGND, V
__________________________________________Typical Operating Characteristics
Quiescent Battery Current (V+)
Quiescent Supply Current
(V
Reference Voltage
Reference Load Regulation
Overvoltage Trip Threshold
Output Undervoltage Threshold
Current-Limit Threshold (positive
direction, fixed)
Current-Limit Threshold (positive
direction, adjusted)
Thermal Shutdown Threshold
V
Threshold
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
CC
100
CC
90
80
60
70
0.01
Undervoltage Lockout
+ V
(1.8V, 4A COMPONENTS, SKIP = GND)
50% of the ripple. In discontinuous conduction (SKIP = AGND, light load) the output voltage will have DC regulation
higher than the trip level by approximately 1.5% due to slope compensation.
in-circuit times may differ due to MOSFET switching speeds.
PARAMETER
DD
EFFICIENCY vs. LOAD CURRENT
)
V+ = +7V
0.1
LOAD CURRENT (A)
V+ = +20V
_______________________________________________________________________________________
Ultra-High Efficiency, Dual Step-Down
1
V+ = +12V
Controller for Notebook Computers
FB1 and FB2 forced above the regulation point
No external REF load
I
With respect to error comparator threshold
With respect to error comparator threshold
PGND - LX_, I
PGND - LX_, I
PGND - LX_, I
Hysteresis = 10°C
Rising edge, hysteresis = 20mV, PWM disabled below
this level
ON_, SKIP
ON_, SKIP
SKIP, to deactivate OVP circuitry
REF
10
= 0 to 50µA
IN
100
80
LIM
LIM
LIM
60
40
20
= +15V, SKIP = AGND, TON = unconnected, T
0
CC =
0.01
= V
resistor = 100kΩ
resistor = 400kΩ
(1.8V, 4A COMPONENTS, SKIP = V
EFFICIENCY vs. LOAD CURRENT
V
CC
CONDITIONS
DD
V+ = +7V
= +5V, SKIP = AGND, V+ = 15V, T
0.1
LOAD CURRENT (A)
V+ = +20V
V+ = +12V
1
CC
)
10
100
90
80
60
70
0.01
A
A
1.97
(2.5V, 4A COMPONENTS, SKIP = GND)
MIN
= -40°C to +85°C, unless otherwise
160
4.1
2.4
10
60
75
32
= +25°C, unless otherwise noted.)
-5
EFFICIENCY vs. LOAD CURRENT
V+ = +7V
1100
TYP
12.5
0.1
LOAD CURRENT (A)
100
200
150
25
70
50
2
V+ = +20V
BST
= 5V. Actual
MAX
1600
2.03
0.01
125
240
4.4
0.8
70
15
80
62
-1
V+ = +12V
1
UNITS
mA
mV
mV
µA
µA
°C
%
%
V
V
V
V
V
10
5