MAX5052AEUA+ Maxim Integrated Products, MAX5052AEUA+ Datasheet - Page 12

• Manufacturer Part Number: MAX5052AEUA+
• Description: IC CNTRLR PWM CRNT MD 8-UMAX
• Manufacturer: Maxim Integrated Products

Specifications of MAX5052AEUA+

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 290kHz
• Duty Cycle: 50%
• Voltage - Supply: 23.6 V ~ 30 V
• Buck: No
• Boost: Yes
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Frequency-max: 290kHz
• Duty Cycle (max): 50 %
• Output Current: 1000 mA
• Mounting Style: SMD/SMT
• Switching Frequency: 262 KHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Synchronous Pin: No
• Topology: Boost, Flyback
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Current-Mode PWM Controllers with an Error
Amplifier for Isolated/Nonisolated Power Supplies
12
0V
COMP
V
UVLO
SUPPLY
V
R5
R6
CS
FB
IN
______________________________________________________________________________________
C1
R1
CLAMP
26.1V
V
ERROR
IN
AMP
C2
Typical Operating Circuit
C3
D4
0.3V
VO
V
C5
1.4V
CS
PWM
V
V
COMP
FB
IN
CC
MAX5052
SOFT-START
DIGITAL
R7
UVLO/EN
CPWM
ILIM
NDRV
GND
CS
R2
R3
D1
Q1
REFERENCE
R4
1.23V
T1
MAX5052/MAX5053
C4
D2
OSCILLATOR
262kHz*
V
OUT
21.6V
9.74V
1.28V
1.23V
BOOTSTRAP UVLO
*The MAX5053 does not have an internal bootstrap UVLO. The
MAX5053 starts operation as long as the V
7V (the guaranteed output with a V
the UVLO/EN pin is high.
MAX5052A
MAX5052B
MAX5053A
MAX5053B
UVLO
PART
SHUTDOWN
**
THERMAL
S
R
BOOTSTRAP
Q
*MAX5052A/MAX5053A: 50% MAXIMUM DUTY CYCLE,
**MAX5052 ONLY.
MAX5052B/MAX5053B: 75% MAXIMUM DUTY CYCLE.
UVLO
Yes
Yes
IN
REG_OK
No
No
REGULATOR
(INTERNAL 5.25V SUPPLY)
Functional Diagram
IN
V
STARTUP
VOLTAGE
CC
V
Selector Guide
pin voltage of 10.8V) and
L
10.8V*
10.8V*
22 V
22V
DRIVER
CC
pin is higher than
MAX DUTY
CYCLE
50%
75%
50%
75%
V
NDRV
GND
CC