Datasheet MAX25600 (Maxim) - 4

MAX25600 Synchronous High-Voltage Four-Switch Buck- Boost LED Controller
Electrical Characteristics (continued)
(VIN = 12V, VUVEN = 12V, limits are 100% tested at TA = +25°C and TA = +125°C. Limits over the operating temperature range and relevant supply-voltage range are guaranteed by design and characterization.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
VICTRL = 1.3V, 3V < (VISP - VISN) < 60V 213.8 220 226.2 LED Current-Sense Regulation Voltage VICTRL = 1.2V, 3V < (VISP - VISN) < 60V 194 200 206 mV VICTRL = 0.4V, 3V < (VISP - VISN) < 60V 36 40 44 LED Current-Sense Regulation VICTRL = 1.2V, 0V < (VISP- VISN) < 3V 192 200 208 Voltage (Low Range) mV VICTRL = 0.4V, 0V < (VISP - VISN) < 3V 35 40 45 Common-Mode Input Range VISP rising 2.75 2.85 2.95 Selector RNGSEL V VISP falling 2.5 2.6 2.7
OSCILLATOR
Switching-Frequency Range 200 700 kHz Bias Voltage at RT VRT 1.25 V Oscillator Frequency Accuracy Dither disabled -10 +10 % Frequency Dither fDITH Dither enabled, fSW = 200kHz to 700kHz ±6 % RRT = 50KΩ 370 400 430 Switching Frequency fSW RRT=105KΩ 180 200 220 kHz RRT=25.5KΩ 630 700 770
SLOPE COMPENSATION ON CSP
Slope Compensation Peak-current ramp added to CSP input per Current-Ramp Height ISLOPE_PK switching cycle at 100% duty cycle 42.5 50 57.5 µA
ERROR AMPLIFIER
Transconductance gM VISP - VISN = 200mV 1170 1800 2430 µS COMP Sink Current COMPISINK VCOMP = 5V 300 µA COMP Source Current COMPISRC VCOMP = 0V 300 µA
nMOS GATE DRIVERS
DH1 Sourcing Resistance RDH1_SRC 2.2 Ω DH2 Sourcing Resistance RDH2_SRC 1.3 Ω DH_ Sinking Resistance RDH_SINK 0.9 Ω DL_ Sourcing Resistance RDL_SRC DL_ = high 1.3 Ω DL_ Sinking Resistance RDL_SINK DL_ = low 0.9 Ω DH_ to DL_ Dead Time DH_ fall to DL_ rise 20 ns DL_ to DH_ Dead Time DL_ fall to DH_ rise 20 ns www.maximintegrated.com Maxim Integrated │ 4