MAX1836 Maxim, MAX1836 Datasheet - Page 2

• Manufacturer Part Number: MAX1836
• Description: 24V Internal Switch / 100% Duty Cycle / Step-Down Converters
• Manufacturer: Maxim

ABSOLUTE MAXIMUM RATINGS
IN, SHDN to GND ...................................................-0.3V to +25V
LX to GND.......................................................-2V to (V
OUT, FB to GND.......................................................-0.3V to +6V
Continuous Power Dissipation (T
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.
24V Internal Switch, 100% Duty Cycle,
Step-Down Converters
Note 1: Thermal properties are specified with product mounted on PC board with 1in
ELECTRICAL CHARACTERISTICS
(Circuits of Figures 1 (MAX1836) and 2 (MAX1837), V
unless otherwise noted.)
Dual Mode is a trademark of Maxim Integrated Products, Inc.
2
Input Supply Range
Input Undervoltage Lockout
Threshold
Input Supply Current
Input Supply Current in Dropout
Input Shutdown Current
Output Voltage (Preset Mode)
Output Voltage Range
(Adjustable Mode)
Feedback Set Voltage
(Adjustable Mode)
OUT Bias Current
FB Bias Current
FB Dual Mode
LX Switch Minimum Off-Time
LX Switch Maximum On-Time
LX Switch On-Resistance
LX Current Limit
LX Zero-Crossing Threshold
6-Pin SOT23 (derate 8.7mW/°C above +70°C)............696mW
_______________________________________________________________________________________
PARAMETER
TM
Threshold
A
= +70°C) (Note 1)
SYMBOL
I
t
t
IN (D ROP)
OFF( M IN)
ON (M AX )
V
V
V
I
UVLO
V
R
V
I
I
OUT
OUT
LIM
FB
IN
FB
LX
IN
V
V
V
SHDN = GND
FB = GND,
I
(MAX1836) or
250mA (MAX1837)
(Note 2)
V
V
V
V
V
MAX1836
MAX1837
LOAD
IN
IN
IN
OUT
FB
FB
FB
IN
rising
falling
= 5V
= 6V
IN
= 0 or 1.25V, T
rising or falling
= 1.3V
IN
= 5V
= 0 to 125mA
+ 0.3V)
= 12V, SHDN = IN, T
CONDITIONS
A
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
= +25°C
MAX183_EUT50
MAX183_EUT33
A
= 0°C to +85°C. Typical values are at T
2
of copper area and still air.
3.168
1.200
3.55
3.45
4.80
1.25
MIN
250
500
-25
-75
4.5
0.2
50
7
TYP
5.00
3.30
1.25
100
312
625
4.0
3.9
2.5
0.4
1.1
12
18
10
3
3.432
1.300
MAX
5.20
+25
+75
150
450
850
V
4.4
4.3
7.4
0.6
24
25
13
7
2
IN
A
= +25°C,
UNITS
mV
mA
mV
µA
µA
µA
µA
nA
µs
µs
Ω
V
V
V
V
V