Storage Temperature Range............................. -65°C to +160°C
Lead Temperature (soldering, 10s).................................+300°C
Soldering Temperature (reflow).......................................+260°C
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.
Package Thermal Characteristics
(Note 1)
TDFN
Junction-to-Ambient Thermal Resistance (θ
JA
) .......67.3°C/W
Junction-to-Case Thermal Resistance (θ
JC
) ............18.2°C/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(V
IN
= 24V, V
GND
= V
PGND
= 0V, C
VIN
= C
VCC
= 1μF, V
EN
= 1.5V, C
SS
= 3300pF, V
FB
= 0.98 x V
OUT
, LX = unconnected,
RESET
= unconnected. T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C. All voltages are referenced to
GND, unless otherwise noted.) (Note 2)
PARAMETER
INPUT SUPPLY (V
IN
)
Input Voltage Range
V
IN
I
IN-SH
Input Supply Current
V
EN
= 0V, shutdown mode
Normal
MAX17501E/F/G
switching mode,
MAX17501H
no load
V
EN
rising
V
EN
falling
V
EN
falling, true shutdown
V
EN
= V
IN
= 60V, T
A
= +25°C
6V < V
IN
< 12V, 0mA < I
VCC
< 10mA,
12V < V
IN
< 60V, 0mA < I
VCC
< 2mA
V
CC
= 4.3V, V
IN
= 12V
V
IN
= 4.5V, I
VCC
= 5mA
V
CC
rising
V
CC
falling
1.194
1.114
I
IN-HIBERNATE
V
FB
= 1.03 x V
OUT
, MAX17501A/B
I
IN-SW
ENABLE/UVLO (EN/UVLO)
V
ENR
EN Threshold
EN Input Leakage Current
LDO
V
CC
Output Voltage Range
V
CC
Current Limit
V
CC
Dropout
V
CC
UVLO
V
CC
I
VCC-MAX
V
CC-DO
V
CC-UVR
V
CC-UVF
4.65
15
4.1
3.85
3.55
4
3.7
4.15
3.85
5
40
5.35
80
V
mA
V
V
V
ENF
V
EN-TRUESD
I
EN
1.218
1.135
0.7
8
200
nA
1.236
1.156
V
4.5
0.9
90
4.75
2.5
60
3.5
145
6.75
3.6
V
µA
mA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
www.maximintegrated.com
Maxim Integrated │ 2
MAX17501
60V, 500mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Electrical Characteristics (continued)
(V
IN
= 24V, V
GND
= V
PGND
= 0V, C
VIN
= C
VCC
= 1μF, V
EN
= 1.5V, C
SS
= 3300pF, V
FB
= 0.98 x V
OUT
, LX = unconnected,
RESET
= unconnected. T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C. All voltages are referenced to
GND, unless otherwise noted.) (Note 2)
PARAMETER
POWER MOSFETs
High-Side pMOS On-Resistance
R
DS-ONH
I
LX
= 0.5A
(sourcing)
I
LX
= 0.5A
(sinking)
T
A
= +25°C
T
A
= T
J
= +125°C
(Note 3)
T
A
= +25°C
T
A
= T
J
= +125°C
(Note 3)
0.2
0.55
0.85
1.2
0.35
0.47
1
Ω
Ω
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Low-Side nMOS On-Resistance
R
DS-ONL
LX Leakage Current
SOFT-START (SS)
Charging Current
FEEDBACK (FB/VO)
FB Regulation Voltage
I
LX_LKG
V
EN
= 0V, T
A
= +25°C,
V
LX
= (V
PGND
+ 1V) to (V
IN
- 1V)
V
SS
= 0.5V
MAX17501G/H
MAX17501A/E, V
FB
= 3.3V
4.7
0.884
6.8
6.8
5
0.9
12
12
µA
I
SS
V
FB_REG
5.3
0.916
17
µA
V
FB Input Bias Current
I
FB
T
A
= +25NC
MAX17501B/F, V
FB
= 5V
MAX17501G/H, V
FB
= 0.9V
µA
17
100
nA
OUTPUT VOLTAGE (V
OUT
)
MAX17501A/E
MAX17501B/F
Output Voltage Range
V
OUT
MAX17501G
MAX17501H
V
OUT
Threshold for Entering
Hibernate Mode
V
OUT
Threshold for Exiting
Hibernate Mode
Transconductance
COMP Source Current
COMP Sink Current
Current-Sense Transresistance
V
FB_HBR
V
FB_HBF
V
FB
rising, MAX17501A/B
V
FB
falling, MAX17501A/B
3.248
4.922
0.9
0.9
103.3
101.3
3.3
5
3.352
5.08
0.92 x
V
IN
0.965
x V
IN
%
%
V
TRANSCONDUCTANCE AMPLIFIER (COMP)
G
M
I
COMP_SRC
I
COMP_SINK
R
CS
I
COMP
= ±2.5µA, MAX17501G/H
MAX17501G/H
MAX17501G/H
MAX17501G/H
510
19
19
0.9
590
32
32
1
650
55
55
1.1
µS
µA
µA
V/A
www.maximintegrated.com
Maxim Integrated │ 3
MAX17501
60V, 500mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Electrical Characteristics (continued)
(V
IN
= 24V, V
GND
= V
PGND
= 0V, C
VIN
= C
VCC
= 1μF, V
EN
= 1.5V, C
SS
= 3300pF, V
FB
= 0.98 x V
OUT
, LX = unconnected,
RESET
= unconnected. T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C. All voltages are referenced to
GND, unless otherwise noted.) (Note 2)
PARAMETER
CURRENT LIMIT
Peak Current-Limit Threshold
Runaway Current-Limit Threshold
Sink Current-Limit Threshold
PFM Current-Limit Threshold
TIMINGS
Switching Frequency
Events to Hiccup after Crossing
Runaway Current Limit
V
OUT
Undervoltage Trip Level to
Cause Hiccup
HICCUP Timeout
Minimum On-Time
Maximum Duty Cycle
LX Dead Time
RESET
RESET
Output Level Low
RESET
Output Leakage
Current High
V
OUT
Threshold for
RESET
Falling
V
OUT
Threshold for
RESET Rising
RESET Delay After FB Reaches
95% Regulation
THERMAL SHUTDOWN
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
Note 2:
All limits are 100% tested at +25°C. Limits over temperature are guaranteed by design.
Note 3:
Guaranteed by design, not production tested.
Temperature rising
165
10
°C
°C
V
OUT-OKF
V
OUT-OKR
I
RESET
= 1mA
V
FB
= 1.01 x V
FB-REG
, T
A
= +25°C
V
FB
falling
V
FB
rising
V
FB
rising
90.5
93.5
92.5
95.5
1024
0.02
0.45
94.5
97.5
V
µA
%
%
Cycles
t
ON_MIN
D
MAX
V
FB
= 0.98 x MAX17501A/B/E/F/G
V
FB-REG
MAX17501H
92
96.5
V
OUT-HICF
V
SS
> 0.95V (soft-start is done)
69.14
f
SW
V
FB
> V
OUT-
MAX17501A/B/E/F/G
MAX17501H
HICF
V
FB
< V
OUT-HICF
560
280
280
600
300
300
1
71.14
32,768
75
94
97.5
5
120
96
98.5
73.14
640
320
320
Event
%
Cycles
ns
%
ns
kHz
I
PEAK-LIMIT
I
RUNAWAY-
LIMIT
SYMBOL
CONDITIONS
MIN
0.64
0.65
TYP
0.76
0.78
0.03
MAX
0.86
0.905
UNITS
A
A
A
A
I
SINK-LIMIT
I
PFM
MAX17501A/B
MAX17501E/F/G/H
MAX17501A/B
0.3
0.35
0.125
0.4
www.maximintegrated.com
Maxim Integrated │ 4
MAX17501
60V, 500mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Typical Operating Characteristics
(V
IN
= 24V, V
GND
= V
PGND
= 0V, C
VIN
= C
VCC
= 1μF, V
EN
= 1.5V, C
SS
= 3300pF, V
FB
= 0.98 x V
OUT
, LX = unconnected,
RESET
=
unconnected, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
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