Datasheet

MAX1714
High-Speed Step-Down Controller
for Notebook Computers
_______________________________________________________________________________________ 5
60
0.01 1010.1
EFFICIENCY vs. LOAD CURRENT
(4A COMPONENTS, V
OUT
= 2.5V, 300kHz)
80
100
70
90
MAX1714B-01
LOAD CURRENT (A)
EFFICIENCY (%)
V
IN
= 7V
V
IN
= 20V
V
IN
= 12V
60
0.01 1010.1
EFFICIENCY vs. LOAD CURRENT
(8A COMPONENTS, V
OUT
= 1.6V, 300kHz)
100
70
90
80
MAX1714B-02
LOAD CURRENT (A)
EFFICIENCY (%)
V
IN
= 20V
V
IN
= 12V
V
IN
= 7V
60
0.01 1010.1
EFFICIENCY vs. LOAD CURRENT
(1.5A COMPONENTS, V
OUT
= 2.5V,
TON = GND, 600kHz)
80
100
70
90
MAX1714B-03
LOAD CURRENT (A)
EFFICIENCY (%)
V
IN
= 5V
Note 1: For the MAX1714B, AGND and PGND refer to a single pin designated GND.
Note 2: SKIP may be forced below -0.3V, temporarily exceeding the absolute maximum rating, disabling over/undervoltage fault
detection for the purpose of debugging prototypes (Figure 6). Limit the current drawn to 5mA maximum.
Note 3: When the inductor is in continuous conduction, the output voltage will have a DC regulation level higher than the error-
comparator threshold by 50% of the ripple. In discontinuous conduction (SKIP = AGND, light-loaded), the output voltage
will have a DC regulation level higher than the trip level by approximately 1.5% due to slope compensation.
Note 4: On-time and off-time specifications are measured from 50% point to 50% point at the DH pin with LX = PGND, V
BST
= 5V,
and a 250pF capacitor connected from DH to LX. Actual in-circuit times may differ due to MOSFET switching speeds.
Note 5: Specifications to -40°C are guaranteed by design, not production tested.
__________________________________________Typical Operating Characteristics
(Circuit of Figure 1, components from Table 1, V
IN
= +15V, SKIP = AGND, TON = unconnected, T
A
= +25°C, unless otherwise noted.)
CONDITIONS
Measured at FB with respect to error comparator
threshold, falling edge
%-8 -4PGOOD Trip Threshold
I
SINK
= 1mA V0.4PGOOD Output Low Voltage
High state, forced to 5.5V µA1PGOOD Leakage Current
UNITMIN TYP MAXPARAMETER
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, 4A components from Table 1, V+ = +15V, V
CC
= V
DD
= +5V, SKIP = AGND, T
A
= -40°C to +85°C, unless other-
wise noted.) (Notes 1, 5)