derate 29.7mW/°C above +70°C.)................. mW to 2380mW
Operating Temperature Range ............................-40°C to 125°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 Information
32 pin TQFN
Package Code
Outline Number
Land Pattern Number
Thermal Resistance, Single-Layer Board:
Junction to Ambient (θ
JA
)
Junction to Case (θ
JC
)
Thermal Resistance, Four-Layer Board:
Junction to Ambient (θ
JA
)
Junction to Case (θ
JC
)
36°C/W
3°C/W
U28E+1C
21-100182
90-100069
45°C/W
2°C/W
33.6°C/W
3.3°C/W
47°C/W
3°C/W
T3255Y+6C
21-100041
90-100066
28 pin TSSOP
Package Code
Outline Number
Land Pattern Number
Thermal Resistance, Single-Layer Board:
Junction to Ambient (θ
JA
)
Junction to Case (θ
JC
)
Thermal Resistance, Four-Layer Board:
Junction to Ambient (θ
JA
)
Junction to Case (θ
JC
)
For the latest package outline information and land patterns (footprints), go to
www.maximintegrated.com/packages.
Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
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.
www.maximintegrated.com
Maxim Integrated
│
2
MAX25601A/MAX25601B/
MAX25601C/MAX25601D
Electrical Characteristics
PARAMETER
INPUT VOLTAGE
MAX25601A/MAX25601B
Input Voltage Range
V
IN
MAX25601C/MAX25601D
Synchronous Boost and
Synchronous Buck LED Controllers
(V
IN
= 12V, V
UVEN
= 12V, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
SYMBOL
CONDITIONS
MIN
5
5
4.5
5
TYP
MAX
36
48
5.5
10
12
4.95
4.90
5.0
5.0
35
90
3.92
3.45
5.05
5.10
100
mA
μA
V
UNITS
IN connected to V
DRV
and V
CC
(external bias)
Quiescent Current
Shutdown Current
V
CC
and V
DRV
V
DRV
Output Voltage
V
DRV
Dropout Voltage
V
DRV
Short-Circuit Cur-
rent
V
DRV
Undervoltage
Lockout Rising
V
DRV
Undervoltage
Lockout Falling
UV ENABLE
UVEN Threshold
Hysteresis
FLT
FLTLow
Voltage
FLTLeakage
Current
THERMAL SHUTDOWN
Thermal Shutdown Tem-
perature
Thermal Shutdown Hys-
teresis
BUCK / OFF-TIME CONTROL
Minimum Off-Time
Maximum Off-Time
CS Comparator
Propagation Delay
Linear Range of Pulse
Doubler
t
CS_DLY
t
OFF_MIN_
BUCK
I
Q
I
SHDN
V
DIM
= 5V, V
IN
= 12V, V
OUT_BOOST
= 48V,
boost and buck not switching
V
DIM
= 0V, V
IN
= 12V, V
UVEN
= 0V
I
VDRV
= 30mA, 5.5V ≤ V
IN
≤ 36V
I
VDRV
= 10mA to 60mA, 6V ≤ V
IN
≤ 25V
I
VDRV
= 5mA, V
IN
= 4.5V
V
DRV
= 4.5V, V
IN
= 6V
Rising voltage
Falling voltage
V
DRV
V
mV
mA
V
V
VDRV
IMAX
VDRV
UVLOR
VDRV
UVLOF
V
TH_UVEN
1.12
1.24
100
1.37
V
mV
Any boost or buck fault present
FLT
LK
V
FLT
=
5.5V, 100kΩ pullup
Rising
165
10
0.4
1
V
μA
°C
°C
V
CSP
- V
CSN
= 0V
125
42
65
0
200
ns
μs
ns
5
μs
www.maximintegrated.com
Maxim Integrated
│
3
MAX25601A/MAX25601B/
MAX25601C/MAX25601D
Electrical Characteristics (continued)
PARAMETER
Minimum On-Time
Maximum On-Time
t
ON
Pulldown
Resistance
t
ON
Threshold to DH
Falling Delay
OUT Overvoltage
Threshold
OUT Overvoltage
Hysteresis
Short Fault Threshold
Programmed On-Time
BUCK / ANALOG DIMMING INPUT
REFI Input Voltage
Range
REFI Zero Current
Threshold
Internal REFI Clamp
Voltage
REFI Input Bias Current
BUCK / BUCK FAULTS
LED Open-Fault Enable
Threshold
LED Open-Fault
Detection Threshold
Buck Current-Sense
Gain
Buck Current-Sense
Amplifier Offset
DIM Input High
DIM Input Low
DIM Rising to DL2
Rising Delay
External DIM Frequency
Range
Internal Ramp Frequency
DIM Comparator Offset
Voltage
DIM Voltage for 100%
Duty Cycle
www.maximintegrated.com
Synchronous Boost and
Synchronous Buck LED Controllers
(V
IN
= 12V, V
UVEN
= 12V, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
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