MAX1761 Maxim, MAX1761 Datasheet - Page 5

• Manufacturer Part Number: MAX1761
• Description: Small / Dual / High-Efficiency Buck Controller for Notebooks
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, C
unless otherwise noted.) (Note 1)
Note 1: Specifications to -40°C are guaranteed by design, not production tested.
Note 2: If V+ is less than 5V, V+ must be connected to VL. If VL is connected to V+, V+ must be between 4.5V and 5.5V.
Note 3: DC output accuracy specifications refer to the trip-level error of the error amplifier. The output voltage will have a DC regula-
Note 4: One-shot times are measured at the DH pin (V+ = 15V, C
GATE DRIVERS
DH_ Gate Driver On-Resistance
(Pullup)
DH_ Gate Driver On-Resistance
(Pulldown)
DL_ Gate Driver On-Resistance
(Pullup)
DL_ Gate Driver On-Resistance
(Pulldown)
DH_ Gate Driver Source/Sink
Current
DL_ Gate Drive Sink Current
DL_ Gate Driver Source Current
LOGIC CONTROLS
ON_ Logic Input High Voltage
ON2 Logic Input Float Voltage
(Forced-PWM Mode)
ON_ Logic Input Low Voltage
ON1 Logic Input Current
ON2 Logic High Input Current
ON2 Logic Low Input Current
FB_ Dual Mode Threshold
tion higher than the trip level by 50% of the ripple. In PFM mode, the output will rise by approximately 1.5% when transition-
ing from continuous conduction to no load.
be different due to MOSFET switching speeds.This effect can also cause the switching frequency to vary.
PARAMETER
_______________________________________________________________________________________
VL
= 4.7µF, C
SYMBOL
REF
Buck Controller for Notebooks
V+ = 6V to 20V, DH_, high state
DH_, low state
DL_, high state
DL_, low state
V
V
V
V
V
V
DH_
DL_
DL_
ON1
ON2
ON2
= 0.1µF, VL not externally driven unless otherwise noted, T
= 2.5V
= 2.5V
= 3V, V+ = 6V
> 2.0V
> 2.0V
< 0.5V, V
Small, Dual, High-Efficiency
ON1
CONDITIONS
DH
> 2.0V
= 400pF, 90% point to 90% point). Actual in-circuit times may
2.05
MIN
1.3
50
-1
-2
0
TYP
A
= -40°C to +85°C,
MAX
1.95
150
0.5
10
8
8
5
1
3
0
UNITS
mV
µA
µA
µA
Ω
Ω
Ω
Ω
A
A
A
V
V
V
5