Operating Temperature Range...........................-40oC to +125°C
Maximum Junction Temperature.......................................+150°C
Storage Temperature Range..............................-60°C to +150°C
Lead Temperature (soldering, 10s)...................................+300°C
*As per JEDEC 51 Standard.
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
(V
IN
= V
ON/OFF
= 12V, V
REG
= V
DVREG
, V
SYNC
= PGND = SGND, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values
are at T
A
= + 25°C.) (Note 1)
PARAMETER
Input Voltage Range
Undervoltage Lockout Threshold
Undervoltage Lockout Hysteresis
Switching Supply Current (PWM
Operation)
Efficiency
No-Load Supply Current
(PFM Operation)
Shutdown Current
ON/OFF CONTROL
Input Voltage Threshold
Input Voltage Hysteresis
Input Bias Current
ERROR AMPLIFIER/SOFT-START
Soft-Start Current
Reference Voltage (Soft-Start)
FB Regulation Voltage
FB Input Range
FB Input Current
COMP Voltage Range
Open-Loop Gain
Unity-Gain Bandwidth
FB Offset Voltage
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SYMBOL
V
IN
UVLO
UVLO
HYST
I
SW
MAX5082
MAX5083
CONDITIONS
MIN
4.5
7.5
3.9
6.8
TYP
MAX
40
40
4.2
7.3
UNITS
V
V
V
mA
V
IN
rising, MAX5082
V
IN
rising, MAX5083
MAX5082
MAX5083
V
FB
= 0V, MAX5082
V
FB
= 0V, MAX5083
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 1.5A
V
IN
= 4.5V, V
OUT
= 3.3V, I
OUT
= 1.5A
(MAX5082)
MAX5082
MAX5083
0.4
0.7
10.5
9.5
84
88
1.4
1.3
200
1.20
-250
8
1.215
15
1.228
1.228
1.23
0.12
2.5
2.3
300
1.25
+250
24
1.240
1.240
1.5
+250
4.50
80
1.8
%
mA
µA
V
V
nA
µA
V
V
V
nA
V
dB
MHz
I
SHDN
V
ON/OFF
V
ON/OFF
= 0V, V
IN
= 40V
V
ON/OFF
rising
V
ON/OFF
= 0 to 40V
I
SS
V
SS
V
FB
I
COMP
= -500μA to +500μA
1.215
0
-250
I
COMP
= -500μA to +500μA
0.25
I
COMP
= -500μA to +500μA
-5
+5
mV
Maxim Integrated │
2
MAX5082/MAX5083
Electrical Characteristics (continued)
PARAMETER
OSCILLATOR
Frequency
Maximum Duty Cycle
SYNC High-Level Voltage
SYNC Low-Level Voltage
SYNC Frequency Range
PWM Modulator Gain
Ramp Level Shift (Valley)
POWER SWITCH
Switch On-Resistance
Switch Gate Charge
Switch Leakage Current
BST Leakage Current
CHARGE PUMP
C- Output Voltage Low
C- Output Voltage High
DVREG to C+ On-Resistance
LX to PGND On-Resistance
CURRENT-LIMIT COMPARATOR
Pulse-Skip Threshold
Cycle-by-Cycle Current Limit
Number of Consecutive ILIM
Events to Hiccup
Hiccup Timeout
INTERNAL VOLTAGE REGULATOR
Output Voltage
Line Regulation
Load Regulation
Dropout Voltage
THERMAL SHUTDOWN
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
Temperature rising
V
REG
MAX5082
MAX5083
I
PFM
I
ILIM
V
BST
- V
LX
= 6V
V
BST
- V
LX
= 6V
f
SYNC
f
SW
D
MAX
V
SYNC
= 0V
SYMBOL
1.5A, 40V, MAXPower Step-Down
DC-DC Converters
(V
IN
= V
ON/OFF
= 12V, V
REG
= V
DVREG
, V
SYNC
= PGND = SGND, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values
are at T
A
= + 25°C.) (Note 1)
CONDITIONS
MIN
225
87
87
87
2.2
0.8
150
f
SYNC
= 150kHz to 350kHz
10
0.3
0.3
6
10
10
0.1
0.1
10
12
100
1.9
200
2.7
4
512
Clock
periods
5.25
8.4
1
1
0.25
0.5
0.5
+160
20
300
3.5
0.6
350
V
V
kHz
V/ V
V
Ω
nC
µA
µA
V
V
Ω
Ω
mA
A
%
TYP
250
MAX
275
UNITS
kHz
V
SYNC
= 0V, V
IN
= 4.5V, MAX5082
V
SYNC
= 0V, V
IN
= 7.5V, MAX5083
V
SYNC
= 0V, V
IN
≤ 40V
V
IN
= 40V, V
LX
= V
BST
= 0V
V
BST
= V
LX
= V
IN
= 40V
MAX5082 only, sinking 10mA
MAX5082 only, relative to DVREG,
sourcing 10mA
MAX5082 only, sourcing 10mA
Sinking 10mA
4.75
7.6
5
8
V
mV/ V
V
V
V
IN
= 5.5V to 40V, MAX5082
V
IN
= 9.0V to 40V, MAX5083
I
REG
= 0 to 20mA
V
IN
= 4.5V, I
REG
= 20mA, MAX5082
V
IN
= 4.5V, I
REG
= 20mA, MAX5083
°C
°C
Note 1:
100% production tested at TA = +25°C and TA = +125°C. Limits at -40°C are guaranteed by design.
www.maximintegrated.com
Maxim Integrated │
3
MAX5082/MAX5083
1.5A, 40V, MAXPower Step-Down
DC-DC Converters
Typical Operating Characteristics
(V
IN
= 12V, see Figure 5 (MAX5082) and Figure 6 (MAX5083), T
A
= +25°C, unless otherwise noted.)
UNDERVOLTAGE LOCKOUT HYSTERESIS (V)
UNDERVOLTAGE LOCKOUT HYSTERESIS (V)
MAX5082/3 toc01
MAX5082/3 toc02
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-40
-15
10
35
60
85
110
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-40
-15
10
35
60
85
110
ON/OFF THRESHOLD HSYSTERESIS (V)
0.15
0.10
0.05
135
135
0
-40
-15
10
35
60
85
110
135
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE (MAX5082)
MAX5082/3 toc04
MAX5082/3 toc05
SHUTDOWN SUPPLY CURRENT (µA)
SHUTDOWN SYPPLY CURRENT (µA)
225
200
175
150
125
100
75
50
25
0
0
T
A
= +135°C
T
A
= +85°C
T
A
= +135°C
T
A
= +85°C
3.5
SUPPLY CURRENT (mA)
3.0
2.5
2.0
1.5
1.0
0.5
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
T
A
= +135°C
225
200
175
150
125
100
75
50
25
0
T
A
= +25°C
T
A
= -40°C
T
A
= +25°C
T
A
= -40°C
V
ON/OFF
= 0V
5
10
15
20
25
30
35
40
V
ON/OFF
= 0V
0
5
10
15
20
25
30
35
40
0
0
5
10
15
20
25
30
35
40
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
OPERATING FREQUENCY
vs. TEMPERATURE
MAX5082/3 toc07
258
OPERATING FREQUENCY (kHz)
256
254
252
250
248
246
244
242
240
-40
-15
10
35
60
85
110
V
IN
= 40V
V
IN
= 4.5V
98
MAXIMUM DUTY CYCLE (%)
96
94
92
90
88
86
84
82
80
135
0
5
10
15
20
25
30
35
40
TEMPERATURE (°C)
INPUT VOLTAGE (V)
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Maxim Integrated │ 4
MAX5082/3 toc08a
260
100
MAXIMUM DUTY CYCLE
vs. INPUT VOLTAGE (MAX5082)
MAX5082/3 toc06
250
300
275
250
SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE (MAX5083)
4.0
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (MAX5082)
MAX5082/3 toc03
1.0
UNDERVOLTAGE LOCKOUT HYSTERESIS
vs. TEMPERATURE (MAX5082)
1.0
UNDERVOLTAGE LOCKOUT HYSTERESIS
vs. TEMPERATURE (MAX5083)
0.20
ON/OFF THRESHOLD HYSTERESIS
vs. TEMPERATURE
MAX5082/MAX5083
1.5A, 40V, MAXPower Step-Down
DC-DC Converters
Typical Operating Characteristics (continued)
(V
IN
= 12V, see Figure 5 (MAX5082) and Figure 6 (MAX5083), T
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