Rainbow Electronics MAX1709 - Manual (Page 3)

MAX1709
4A, Low-Noise, High-Frequency,
Step-Up DC-DC Converter
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V OUT = V CLK = +3.6V, ONA = ONB = FB = GND, T A = 0°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.)
ELECTRICAL CHARACTERISTICS
(V
OUT
= V
CLK
= +3.6V, ONA = ONB = FB = GND, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 9)
PARAMETER CONDITIONS MIN TYP MAX UNITS
ONA, ONB, 3.3/5, 1.2V < V OUT < 5.5 0.8 V OUT
Input High Level
CLK, 2.7 V< V OUT < 5.5V 0.8 x V OUT
V
Logic Input Current ONA, ONB, CLK, 3.3/5 1 µA
Internal Oscillator Frequency 520 600 680 kHz
Maximum Duty Cycle 82 90 94 %
External Clock Frequency
Range
350 1000 kHz
CLK Pulse Width (Note 8) 100 ns
CLK Rise/Fall Time (Note 8) 50 ns
x
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
FB
< 0.1V, V
IN
= +2.4V 3.3/5 = GND, I
SW
= 1A 3.24 3.45
Output Voltage
(Note 1) 3.3/5 = OUT, I SW = 1A 4.9 5.2
V
FB Regulation Voltage I SW = 1A 1.21 1.27 V
FB Input Current V FB = +1.5V 200 nA
Load Regulation Measured between 1A < I SW < 5A (Note 2) -0.45 %/A
Soft-Start Pin Current SS/LIM = 1V 3.2 5.2 µA
OUT Leakage Current in
Shutdown
V ONB = 3.6V 5 µA
OUT Supply Current V FB = 1.5V (Note 6) 400 µA
N-Channel Switch
On-Resistance
40 m Ω
SS/LIM = unconnected 7.5 15
N-Channel Current Limit
SS/LIM = 150k Ω to GND 3.5 7
V
Reference Voltage I REF = 0 1.24 1.28 V