MAX1761 Maxim, MAX1761 Datasheet - Page 3

• 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
otherwise noted.) (Note 1)
FAULT PROTECTION
Output Undervoltage Threshold
(Foldback)
Output Undervoltage Blanking
Time
Current-Limit Threshold
Thermal Shutdown Threshold
VL Undervoltage Lockout
Threshold
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 Drive 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
PARAMETER
_______________________________________________________________________________________
VL
= 4.7µF, C
V
SYMBOL
V
V
FB,UVLO(t)
FB,UVFB
VL,UVLO
REF
Buck Controller for Notebooks
2.0V < V
V
V
With respect to the regulation point, no load
Measured from ON_ signal going high
GND - CS_, positive direction
GND - CS_, negative direction, ON2 = floating
GND - CS_, zero crossing, ON2 = 5V
Hysteresis = 10
Rising edge, hysteresis = 20mV, PWM is
disabled below this voltage
V+ = 6V to 20V, DH_, high state
DH_, low state
DL_ , high state
DL_, low state
V
V
V
= 0.1µF, VL not externally driven unless otherwise noted, T
ON2
ON2
DH_
DL_
DL_
= 2.5V
= 2.5V
= 3V, V+ = 6V
> 2.0V
< 0.5V, V
Small, Dual, High-Efficiency
ON1
< VL
ON1
o
CONDITIONS
C
> 2.0V
-135
MIN
2.05
4.1
1.3
60
10
92
50
-1
-2
0
TYP
-120
100
160
100
A
2.5
3.7
6.2
3.4
2.0
0.6
0.9
0.5
1.7
70
-1
1
= 0°C to +85°C, unless
MAX
-105
1.95
108
150
4.4
0.5
80
32
10
8
8
5
1
3
0
UNITS
ms
mV
mV
µA
µA
µA
o
%
Ω
Ω
Ω
Ω
V
A
A
A
V
V
V
C
3