Datasheet

MAX17502 60V, 1A, Ultra-Small, High-Efciency,
Synchronous Step-Down DC-DC Converter
www.maximintegrated.com
Maxim Integrated │ 4
Electrical Characteristics (continued)
(V
IN
= 24V, V
GND
= V
PGND
= 0V, C
VIN
=2.2μF,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 refer-
encedtoGND,unlessotherwisenoted.)(Note2)
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.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CURRENT LIMIT
Peak Current-Limit Threshold I
PEAK-LIMIT
1.4 1.65 1.9 A
RunawayCurrent-LimitThreshold
I
RUNAWAY-
LIMIT
1.45 1.7 2 A
Sink Current-Limit Threshold I
SINK-LIMIT
MAX17502E/F/G/H 0.56 0.65 0.74 A
TIMINGS
Switching Frequency f
SW
V
FB
> V
OUT-
HICF
MAX17502E/F/G 560 600 640
kHzMAX17502H 280 300 320
V
FB
< V
OUT-HICF
280 300 320
EventstoHiccupafterCrossing
RunawayCurrentLimit
1 Event
V
OUT
Undervoltage Trip Level to
CauseHiccup
V
OUT-HICF
V
SS
> 0.95V (soft-start is done) 69.14 71.14 73.14 %
HICCUPTimeout 32,768 Cycles
Minimum On-Time t
ON_MIN
75 120 ns
Maximum Duty Cycle D
MAX
V
FB
= 0.98 x
V
FB-REG
MAX17502E/F/G 92 94 96
%
MAX17502H 96.5 97.5 98.5
LX Dead Time 5 ns
RESET
RESET Output Level Low
I
RESET
= 1mA
0.02 V
RESET Output Leakage
CurrentHigh
V
FB
= 1.01 x V
FB-REG
, T
A
= +25°C 0.45 µA
V
OUT
Threshold for RESET Falling
V
OUT-OKF
V
FB
falling 90.5 92.5 94.5 %
V
OUT
Threshold for RESETRising
V
OUT-OKR
V
FB
rising 93.5 95.5 97.5 %
RESETDelayAfterFBReaches
95%Regulation
V
FB
rising 1024 Cycles
THERMAL SHUTDOWN
Thermal-Shutdown Threshold Temperature rising 165 °C
Thermal-ShutdownHysteresis 10 °C