MAX1966 Maxim, MAX1966 Datasheet - Page 8

• Manufacturer Part Number: MAX1966
• Description: Low-Cost Voltage-Mode PWM Step-Down Controllers
• Manufacturer: Maxim

Low-Cost Voltage-Mode PWM
Step-Down Controllers
8
Figure 1. MAX1966 Functional Diagram
Figure 3. MAX1966 Typical Application
SEE TABLE 1 FOR COMPONENT VALUES.
COMP/EN
VIN
_______________________________________________________________________________________
FB
C6
800mV
GENERATOR
5.5V INPUT
C7
REF
2.7V TO
R3
100kHZ
CLOCK
AMPLIFIER
SOFT-START
VIN
COMP/EN
GND
GENERATOR
ERROR
RAMP
MAX1966
BST
DH
DL
LX
FB
COMPARATOR
ERROR
D1
R2
C5
R1
C1
N1
N2
TEMPERATURE
MAX1966
SHUTDOWN
CONTROL
LOGIC
L1
C2
CURRENT-LIMIT
COMPARATOR
C3
-305mV
V
GND
BST
C4
DH
LX
DL
OUT
Figure 4. MAX1967 Typical Application
Figure 2. MAX1967 Functional Diagram
SEE TABLE 1 FOR COMPONENT VALUES.
COMP/EN
28V INPUT
VIN
V
VL
FB
5V TO
CC
C6
R3
800mV
GENERATOR
REF
100kHZ
CLOCK
INTERNAL
CHIP
SUPPLY
REGULATOR
5V LINEAR
VIN
COMP/EN
GND
MAX1967
AMPLIFIER
SOFT-START
GENERATOR
ERROR
RAMP
VCC
BST
DH
DL
VL
LX
FB
10
10
COMPARATOR
R4
ERROR
D1
R2
C5
C7
TEMPERATURE
MAX1967
SHUTDOWN
CONTROL
LOGIC
R1
N1
N2
C1
L1
CURRENT-LIMIT
COMPARATOR
C2
C3
-305mV
GND
BST
DH
DL
V
LX
OUT
C4