MAX1714(1999) データシートの表示（PDF） - Maxim Integrated
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MAX1714 Datasheet PDF : 24 Pages
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High-Speed Step-Down Controller
for Notebook Computers
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, 4A components from Table 1, V+ = +15V, VCC = VDD = +5V, SKIP = AGND, TA = -40°C to +85°C, unless other-
wise noted.) (Notes 1, 5)
PARAMETER
CONDITIONS
MIN TYP MAX UNIT
PGOOD Trip Threshold
Measured at FB with respect to error comparator
threshold, falling edge
-8
-4
%
PGOOD Output Low Voltage
PGOOD Leakage Current
ISINK = 1mA
High state, forced to 5.5V
0.4
V
1
µA
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, VBST = 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, VIN = +15V, SKIP = AGND, TON = unconnected, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(4A COMPONENTS, VOUT = 2.5V, 300kHz)
100
VIN = 7V
90
EFFICIENCY vs. LOAD CURRENT
(8A COMPONENTS, VOUT = 1.6V, 300kHz)
100
VIN = 7V
90
EFFICIENCY vs. LOAD CURRENT
(1.5A COMPONENTS, VOUT = 2.5V,
TON = GND, 600kHz)
100
VIN = 5V
90
80
80
VIN = 12V VIN = 20V
80
VIN = 20V
70
VIN = 12V
70
70
60
60
60
0.01
0.1
1
10
0.01
0.1
1
10
0.01
0.1
1
10
LOAD CURRENT (A)
LOAD CURRENT (A)
LOAD CURRENT (A)
_______________________________________________________________________________________ 5
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