Datasheet

MAX5955/MAX5956
Low-Voltage, Dual Hot-Swap Controllers with
Independent On/Off Control
_______________________________________________________________________________________ 7
UVLO
FAST COMP. SLOW COMP.
FAST DISCHARGE
Q1
OUT1
2.4V 2.4V
BIAS AND
REFERENCES
TIMING
OSCILLATOR
STARTUP
OSCILLATOR
TO STARTUP
LOGIC BLOCKS
CHARGE
PUMP
DEVICE CONTROL
LOGIC
V
SC, TH
V
FS, TH
R
LIM1
SENSE1
IN1
GATE1
R
SENSE1
LIM1
R
LIM2
N
3mA
687mV
543mV
MON1
ON1ON2 PGOOD2PGOOD1
UVLO
FAST COMP.
SLOW COMP.
FAST DISCHARGE
Q2
OUT2
CHARGE-PUMP
OSCILLATOR
TO STARTUP
LOGIC BLOCKS
CHARGE
PUMP
CURRENT CONTROL
AND
STARTUP LOGIC
CURRENT CONTROL
AND
STARTUP LOGIC
V
SC, TH
V
FS, TH
SENSE2 IN2 GATE2
R
SENSE2
LIM2
100µA 3mA
687mV
543mV
MON2
MAX5955 MAX5956
0.875V
R
TIM
TIM
Figure 1. Functional Diagram