Datasheet

www.maximintegrated.com
MaximIntegrated │ 3
MAX15062 60V, 300mA, Ultra-Small, High-Efciency,
Synchronous Step-Down DC-DC Converters
Electrical Characteristics (continued)
(V
IN
= 24V, V
GND
= 0V, C
IN
= C
VCC
= 1µF, V
EN/UVLO
= 1.5V, LX = MODE = 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 SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER MOSFETs
High-SidepMOSOn-Resistance R
DS-ONH
I
LX
= 0.3A
(sourcing)
T
A
= +25°C 1.35 1.75
Ω
T
A
= T
J
= +125°C 2.7
Low-SidenMOSOn-Resistance R
DS-ONL
I
LX
= 0.3A
(sinking)
T
A
= +25°C 0.45 0.55
Ω
T
A
= T
J
= +125°C 0.9
LX Leakage Current I
LX-LKG
V
EN/UVLO
= 0V, V
IN
= 60V, T
A
= +25°C,
V
LX
= (V
GND
+ 1V) to (V
IN
- 1V)
-1 +1 µA
SOFT-START (SS)
Soft-Start Time t
SS
4.1 ms
FEEDBACK (FB)
FBRegulationVoltage V
FB-REG
MODE=GND,MAX15062C 0.887 0.9 0.913
V
MODE = unconnected, MAX15062C 0.887 0.915 0.936
FB Leakage Current I
FB
MAX15062C -100 -25 nA
OUTPUT VOLTAGE (V
OUT
)
V
OUT
RegulationVoltage V
OUT-REG
MODE=GND,MAX15062A 3.25 3.3 3.35
V
MODE = unconnected, MAX15062A 3.25 3.35 3.42
MODE=GND,MAX15062B 4.93 5 5.07
MODE = unconnected, MAX15062B 4.93 5.08 5.18
CURRENT LIMIT
Peak Current-Limit Threshold I
PEAK-LIMIT
0.49 0.56 0.62 A
RunawayCurrent-LimitThreshold
I
RUNAWAY-
LIMIT
0.58 0.66 0.73 A
Negative Current-Limit Threshold I
SINK-LIMIT
MODE=GND 0.25 0.3 0.35 A
0.01 mA
PFM Current Level I
PFM
0.13 A
TIMING
Switching Frequency f
SW
465 500 535 kHz
EventstoHiccupAfterCrossing
RunawayCurrentLimit
1 Cycles
FB/V
OUT
Undervoltage Trip Level
toCauseHiccup
62.5 64.5 66.5 %
HiccupTimeout 131 ms
Minimum On-Time t
ON-MIN
90 130 ns
Maximum Duty Cycle D
MAX
FB/V
OUT
= 0.98 x FB/V
OUT-REG
89 91.5 94 %