MAX746 Maxim, MAX746 Datasheet - Page 10

• Manufacturer Part Number: MAX746
• Description: High-Efficiency / PWM / Step-Down / N-Channel DC-DC Controller
• Manufacturer: Maxim

High-Efficiency, PWM, Step-Down,
N-Channel DC-DC Controller
Figure 2. Block Diagram
10
OUT
AV+
REF
LBI
CC
CS
SS
______________________________________________________________________________________
FB
SOFT-START
CIRCUITRY
100mV
LOW-BATTERY
COMPARATOR
DUAL-MODE
COMPARATOR
CURRENT-SENSE
AMPLIFIER
CURRENT-LIMIT
COMPARATOR
COMPENSATION
SLOPE-
RAMP
LBO
N
REFERENCE
V
AGND
RAMP
+2V
EXT
ERROR
AMPLIFIER
50mV
HIGH
4.3V
5V
PWM
COMPARATOR
LIGHT-LOAD
COMPARATOR
FROM AV+
GND
CHARGE-PUMP CONTROL
COMPARATOR
UNDERVOLTAGE-
LOCKOUT
COMPARATOR
CONTROL
EXT
T T FLIP-
OSCILLATOR
100kHz
FLOP
Q
V+
PUMP
SHDN