High-Speed Step-Down Controller
for Notebook Computers
MAX1714
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, 4A components from Table 1, V+ = +15V, V
CC
= V
DD
= +5V,
SKIP
= AGND,
T
A
=
0°C to +85°C,
unless otherwise
noted.) (Note 1)
PARAMETER
TON V
CC
Level
TON Float Voltage
TON Reference Level
TON AGND Level
TON Input Current
Forced to AGND or V
CC
-3
CONDITIONS
MIN
V
CC
- 0.4
3.15
1.65
3.85
2.35
0.5
3
TYP
MAX
UNITS
V
V
V
V
µA
ELECTRICAL CHARACTERISTICS
(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)
PARAMETER
Input Voltage Range
Error Comparator Threshold
(DC Output Voltage Accuracy)
(Note 3)
Battery voltage, V+
V
CC,
V
DD
FB = OUT
V+ = 4.5V to 28V,
SKIP
= V
CC
FB = AGND
FB = V
DD
CONDITIONS
MIN
2
4.5
0.985
2.462
3.25
140
175
260
380
TYP
MAX
28
5.5
1.015
2.538
3.35
180
225
320
470
500
750
1.98
10
65
85
35
160
4.1
2.4
0.8
-1
1
2.02
15
75
115
65
240
4.4
ns
µA
V
%
%
mV
mV
V
V
V
µA
ns
V
UNITS
V
TON = AGND (600kHz)
On-Time
V+ = 24V,
V
OUT
= 2V
(Note 4)
(Note 4)
FB forced above the regulation point
V
CC
= 4.5V to 5.5V, no external REF load
With respect to error comparator threshold
(MAX1714A only)
With respect to error comparator threshold
TON = REF (450kHz)
TON = unconnected (300kHz)
TON = V
CC
(200kHz)
Minimum Off-Time
Quiescent Supply Current (V
CC
)
Reference Voltage
Overvoltage Trip Threshold
Output Undervoltage
Protection Threshold
Current-Limit Threshold (Positive
PGND - LX, ILIM = V
CC
Direction, Fixed)
Current-Limit Threshold
(Positive Direction, Adjustable)
V
CC
Undervoltage Lockout
Threshold
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
PGND - LX
V
ILIM
= 0.5V
V
ILIM
= 2.0V
Rising edge, hysteresis = 20mV, PWM disabled below
this level
SHDN, SKIP
SHDN, SKIP
SHDN, SKIP
4
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
