Datasheet
(Voltages referenced to GND, unless otherwise specified.)
V
IN
.........................................................................-0.3V to +80V
SGND ....................................................................-0.3V to +0.3V
LX.................................................................-0.8V to (V
IN
+ 0.3V)
BST...............................................................-0.3V to (V
IN
+ 10V)
BST (transient < 100ns)................................-0.3V to (V
IN
+ 15V)
BST to LX................................................................-0.3V to +10V
BST to LX (transient < 100ns) ................................-0.3V to +15V
ON/OFF ..................................................................-0.3V to +80V
VD...........................................................................-0.3V to +12V
FB
MAX5033A/MAX5033B/MAX5033C...................-0.3V to +15V
MAX5033D.........................................................-0.3V to +12V
V
OUT
Short-Circuit Duration (V
IN
≤ 40V).....................Indefinite
VD Short-Circuit Duration..............................................Indefinite
Continuous Power Dissipation (T
A
= +70°C)
8-Pin PDIP (derate 9.1mW/°C above +70°C)..............727mW
8-Pin SO (derate 5.9mW/°C above +70°C)..................471mW
Operating Temperature Range
MAX5033_U_ _...................................................0°C to +85°C
MAX5033_A_ _..............................................-40°C to +125°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature.......................................................+150°C
Lead Temperature (soldering, 10s)...................................+300°C
Soldering Temperature (reflow)
SO, PDIP Lead(Pb)-free...............................................+260°C
SO, PDIP Containing lead (Pb)....................................+240°C
(V
IN
= +12V, V
ON/OFF
= +12V, I
OUT
= 0, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C. See the
Typical Operating Circuit.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Voltage Range V
IN
MAX5033A 7.5 76.0
V
MAX5033B 7.5 76.0
MAX5033C 15 76
MAX5033D 7.5 76.0
Undervoltage Lockout UVLO 5.2 V
Output Voltage V
OUT
MAX5033A, V
IN
= 7.5V to 76V,
I
OUT
= 20mA to 500mA
3.185 3.3 3.415
V
MAX5033B, V
IN
= 7.5V to 76V,
I
OUT
= 20mA to 500mA
4.85 5.0 5.15
MAX5033C, V
IN
= 15V to 76V,
I
OUT
= 20mA to 500mA
11.64 12 12.36
Feedback Voltage V
FB
V
IN
= 7.5V to 76V, MAX5033D 1.192 1.221 1.250 V
Efciency η
V
IN
= 12V, I
LOAD
= 500mA, MAX5033A 86
%
V
IN
= 12V, I
LOAD
= 500mA, MAX5033B 90
V
IN
= 24V, I
LOAD
= 500mA, MAX5033C 94
V
IN
= 12V, V
OUT
= 5V, I
LOAD
= 500mA,
MAX5033D
90
Quiescent Supply Current I
Q
V
FB
= 3.5V, V
IN
= 7.5V to 76V, MAX5033A 270 440
µA
V
FB
= 5.5V, V
IN
= 7.5V to 76V, MAX5033B 270 440
V
FB
= 13V, V
IN
= 15V to 76V, MAX5033C 270 440
V
FB
= 1.3V, MAX5033D 270 440
Shutdown Current I
SHDN
V
ON/OFF
= 0V, V
IN
= 7.5V to 76V
10 45 µA
Peak Switch Current Limit I
LIM
(Note 1) 0.95 1.5 2.1 A
Switch Leakage Current I
OL
V
IN
= 76V, V
ON/OFF
= 0V, V
LX
= 0V
1 µA
MAX5033 500mA, 76V, High-Efciency, MAXPower
Step-Down DC-DC Converter
www.maximintegrated.com
Maxim Integrated
│
2
Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics (MAX5033_U_ _)